<?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/spline-derivative-grapher-visualizing-derivatives-of-spline-curves/sssssbqh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spline-derivative-grapher-visualizing-derivatives-of-spline-curves/sssssbqh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spline-derivative-grapher-visualizing-derivatives-of-spline-curves/sssssbqh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spline-derivative-grapher-visualizing-derivatives-of-spline-curves/sssssbqh"/>
      <lastmod>2026-11-02T00:14:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spline-derivative-grapher-visualizing-derivatives-of-spline-curves/sssssbqh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spline-derivative-grapher-visualizing-derivatives-of-spline-curves/sssssbqh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spline-derivative-grapher-visualizing-derivatives-of-spline-curves/sssssbqh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spline-derivative-grapher-visualizing-derivatives-of-spline-curves/sssssbqh"/>
      <lastmod>2026-11-02T00:14:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-interpretation-of-the-derivative-of-the-arctangent/sssssbqt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-the-derivative-of-the-arctangent/sssssbqt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-interpretation-of-the-derivative-of-the-arctangent/sssssbqt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-the-derivative-of-the-arctangent/sssssbqt"/>
      <lastmod>2026-11-01T20:58:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-interpretation-of-the-derivative-of-the-arctangent/sssssbqt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-the-derivative-of-the-arctangent/sssssbqt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-interpretation-of-the-derivative-of-the-arctangent/sssssbqt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-the-derivative-of-the-arctangent/sssssbqt"/>
      <lastmod>2026-11-01T20:58:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-the-side-length-with-3-digit-square-root/sssssbqx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-side-length-with-3-digit-square-root/sssssbqx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-side-length-with-3-digit-square-root/sssssbqx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-side-length-with-3-digit-square-root/sssssbqx"/>
      <lastmod>2026-11-02T11:48:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-the-side-length-with-3-digit-square-root/sssssbqx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-side-length-with-3-digit-square-root/sssssbqx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-side-length-with-3-digit-square-root/sssssbqx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-side-length-with-3-digit-square-root/sssssbqx"/>
      <lastmod>2026-11-02T11:48:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/optimizing-box-volume/sssssbqi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimizing-box-volume/sssssbqi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimizing-box-volume/sssssbqi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimizing-box-volume/sssssbqi"/>
      <lastmod>2026-11-02T14:56:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/optimizing-box-volume/sssssbqi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimizing-box-volume/sssssbqi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimizing-box-volume/sssssbqi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimizing-box-volume/sssssbqi"/>
      <lastmod>2026-11-02T14:56:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/max-bill-s-geometric-construction-by-mihaela-git-2/sssssbqo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-s-geometric-construction-by-mihaela-git-2/sssssbqo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-s-geometric-construction-by-mihaela-git-2/sssssbqo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-s-geometric-construction-by-mihaela-git-2/sssssbqo"/>
      <lastmod>2026-11-02T18:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/max-bill-s-geometric-construction-by-mihaela-git-2/sssssbqo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-s-geometric-construction-by-mihaela-git-2/sssssbqo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-s-geometric-construction-by-mihaela-git-2/sssssbqo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-s-geometric-construction-by-mihaela-git-2/sssssbqo"/>
      <lastmod>2026-11-02T18:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiply-positive-integers/sssssb1s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiply-positive-integers/sssssb1s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiply-positive-integers/sssssb1s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiply-positive-integers/sssssb1s"/>
      <lastmod>2026-11-02T18:49:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiply-positive-integers/sssssb1s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiply-positive-integers/sssssb1s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiply-positive-integers/sssssb1s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiply-positive-integers/sssssb1s"/>
      <lastmod>2026-11-02T18:49:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-base-position/sssssb17</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-base-position/sssssb17"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-base-position/sssssb17"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-base-position/sssssb17"/>
      <lastmod>2026-11-02T02:53:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-base-position/sssssb17</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-base-position/sssssb17"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-base-position/sssssb17"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-base-position/sssssb17"/>
      <lastmod>2026-11-02T02:53:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-properties-investigation-by-wayne/sssssb1n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-properties-investigation-by-wayne/sssssb1n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-properties-investigation-by-wayne/sssssb1n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-properties-investigation-by-wayne/sssssb1n"/>
      <lastmod>2026-11-02T18:57:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-properties-investigation-by-wayne/sssssb1n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-properties-investigation-by-wayne/sssssb1n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-properties-investigation-by-wayne/sssssb1n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-properties-investigation-by-wayne/sssssb1n"/>
      <lastmod>2026-11-02T18:57:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-cosines-open-middle-problem-sssssb4f/sssssb12</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-cosines-open-middle-problem-sssssb4f/sssssb12"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-cosines-open-middle-problem-sssssb4f/sssssb12"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-cosines-open-middle-problem-sssssb4f/sssssb12"/>
      <lastmod>2026-11-01T20:41:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-cosines-open-middle-problem-sssssb4f/sssssb12</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-cosines-open-middle-problem-sssssb4f/sssssb12"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-cosines-open-middle-problem-sssssb4f/sssssb12"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-cosines-open-middle-problem-sssssb4f/sssssb12"/>
      <lastmod>2026-11-01T20:41:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-perpendicular-bisector-midpoint/sssssb1k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-perpendicular-bisector-midpoint/sssssb1k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-perpendicular-bisector-midpoint/sssssb1k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-perpendicular-bisector-midpoint/sssssb1k"/>
      <lastmod>2026-11-02T17:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-perpendicular-bisector-midpoint/sssssb1k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-perpendicular-bisector-midpoint/sssssb1k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-perpendicular-bisector-midpoint/sssssb1k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-perpendicular-bisector-midpoint/sssssb1k"/>
      <lastmod>2026-11-02T17:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-with-incircle-and-complex-number-connections/sssssb1z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-with-incircle-and-complex-number-connections/sssssb1z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-with-incircle-and-complex-number-connections/sssssb1z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-with-incircle-and-complex-number-connections/sssssb1z"/>
      <lastmod>2026-11-02T17:53:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-with-incircle-and-complex-number-connections/sssssb1z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-with-incircle-and-complex-number-connections/sssssb1z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-with-incircle-and-complex-number-connections/sssssb1z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-with-incircle-and-complex-number-connections/sssssb1z"/>
      <lastmod>2026-11-02T17:53:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/moodle-reflection-and-translation-question/sssssb10</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moodle-reflection-and-translation-question/sssssb10"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moodle-reflection-and-translation-question/sssssb10"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moodle-reflection-and-translation-question/sssssb10"/>
      <lastmod>2026-11-01T23:12:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/moodle-reflection-and-translation-question/sssssb10</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moodle-reflection-and-translation-question/sssssb10"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moodle-reflection-and-translation-question/sssssb10"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moodle-reflection-and-translation-question/sssssb10"/>
      <lastmod>2026-11-01T23:12:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubic-derivative-trace/sssssb1d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-derivative-trace/sssssb1d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-derivative-trace/sssssb1d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-derivative-trace/sssssb1d"/>
      <lastmod>2026-11-01T23:20:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubic-derivative-trace/sssssb1d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-derivative-trace/sssssb1d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-derivative-trace/sssssb1d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-derivative-trace/sssssb1d"/>
      <lastmod>2026-11-01T23:20:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-similarity-9/sssssb1f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-similarity-9/sssssb1f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-similarity-9/sssssb1f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-similarity-9/sssssb1f"/>
      <lastmod>2026-11-02T08:40:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-similarity-9/sssssb1f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-similarity-9/sssssb1f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-similarity-9/sssssb1f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-similarity-9/sssssb1f"/>
      <lastmod>2026-11-02T08:40:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-of-a-triangle-by-kenneth-myers/sssssb18</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-of-a-triangle-by-kenneth-myers/sssssb18"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-of-a-triangle-by-kenneth-myers/sssssb18"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-of-a-triangle-by-kenneth-myers/sssssb18"/>
      <lastmod>2026-11-02T00:51:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-of-a-triangle-by-kenneth-myers/sssssb18</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-of-a-triangle-by-kenneth-myers/sssssb18"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-of-a-triangle-by-kenneth-myers/sssssb18"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-of-a-triangle-by-kenneth-myers/sssssb18"/>
      <lastmod>2026-11-02T00:51:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/percentage-and-derivative-interactive-demonstration/sssssb1u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-and-derivative-interactive-demonstration/sssssb1u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-and-derivative-interactive-demonstration/sssssb1u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-and-derivative-interactive-demonstration/sssssb1u"/>
      <lastmod>2026-11-01T21:54:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/percentage-and-derivative-interactive-demonstration/sssssb1u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-and-derivative-interactive-demonstration/sssssb1u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-and-derivative-interactive-demonstration/sssssb1u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-and-derivative-interactive-demonstration/sssssb1u"/>
      <lastmod>2026-11-01T21:54:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-operations-by-nnhsmath/sssssb15</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-operations-by-nnhsmath/sssssb15"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-operations-by-nnhsmath/sssssb15"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-operations-by-nnhsmath/sssssb15"/>
      <lastmod>2026-11-01T23:31:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-operations-by-nnhsmath/sssssb15</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-operations-by-nnhsmath/sssssb15"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-operations-by-nnhsmath/sssssb15"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-operations-by-nnhsmath/sssssb15"/>
      <lastmod>2026-11-01T23:31:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-a-line-segment/sssssb1b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-a-line-segment/sssssb1b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-a-line-segment/sssssb1b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-a-line-segment/sssssb1b"/>
      <lastmod>2026-11-02T00:46:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-a-line-segment/sssssb1b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-a-line-segment/sssssb1b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-a-line-segment/sssssb1b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-a-line-segment/sssssb1b"/>
      <lastmod>2026-11-02T00:46:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/place-value-cards/sssssb13</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/place-value-cards/sssssb13"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/place-value-cards/sssssb13"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/place-value-cards/sssssb13"/>
      <lastmod>2026-11-01T20:39:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/place-value-cards/sssssb13</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/place-value-cards/sssssb13"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/place-value-cards/sssssb13"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/place-value-cards/sssssb13"/>
      <lastmod>2026-11-01T20:39:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-function-by-michael-l-daly-jones/sssssb1q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function-by-michael-l-daly-jones/sssssb1q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function-by-michael-l-daly-jones/sssssb1q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function-by-michael-l-daly-jones/sssssb1q"/>
      <lastmod>2026-11-02T13:07:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-function-by-michael-l-daly-jones/sssssb1q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function-by-michael-l-daly-jones/sssssb1q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function-by-michael-l-daly-jones/sssssb1q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function-by-michael-l-daly-jones/sssssb1q"/>
      <lastmod>2026-11-02T13:07:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-simulation-by-heather-pierce/sssssb11</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-simulation-by-heather-pierce/sssssb11"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-simulation-by-heather-pierce/sssssb11"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-simulation-by-heather-pierce/sssssb11"/>
      <lastmod>2026-11-02T17:39:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-simulation-by-heather-pierce/sssssb11</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-simulation-by-heather-pierce/sssssb11"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-simulation-by-heather-pierce/sssssb11"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-simulation-by-heather-pierce/sssssb11"/>
      <lastmod>2026-11-02T17:39:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-demonstrating-circle-and-secant-line-geometry/sssssb1m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-circle-and-secant-line-geometry/sssssb1m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-circle-and-secant-line-geometry/sssssb1m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-circle-and-secant-line-geometry/sssssb1m"/>
      <lastmod>2026-11-02T17:14:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-demonstrating-circle-and-secant-line-geometry/sssssb1m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-circle-and-secant-line-geometry/sssssb1m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-circle-and-secant-line-geometry/sssssb1m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-circle-and-secant-line-geometry/sssssb1m"/>
      <lastmod>2026-11-02T17:14:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinate-geometry-to-prove-that-a-quadrilateral-is-a-parallelogram/sssssb1j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-geometry-to-prove-that-a-quadrilateral-is-a-parallelogram/sssssb1j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-geometry-to-prove-that-a-quadrilateral-is-a-parallelogram/sssssb1j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-geometry-to-prove-that-a-quadrilateral-is-a-parallelogram/sssssb1j"/>
      <lastmod>2026-11-02T00:19:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinate-geometry-to-prove-that-a-quadrilateral-is-a-parallelogram/sssssb1j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-geometry-to-prove-that-a-quadrilateral-is-a-parallelogram/sssssb1j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-geometry-to-prove-that-a-quadrilateral-is-a-parallelogram/sssssb1j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-geometry-to-prove-that-a-quadrilateral-is-a-parallelogram/sssssb1j"/>
      <lastmod>2026-11-02T00:19:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-8-5-practice-more-probability-estimation/sssssb1p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-8-5-practice-more-probability-estimation/sssssb1p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-8-5-practice-more-probability-estimation/sssssb1p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-8-5-practice-more-probability-estimation/sssssb1p"/>
      <lastmod>2026-11-02T10:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-8-5-practice-more-probability-estimation/sssssb1p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-8-5-practice-more-probability-estimation/sssssb1p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-8-5-practice-more-probability-estimation/sssssb1p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-8-5-practice-more-probability-estimation/sssssb1p"/>
      <lastmod>2026-11-02T10:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/football-stars-graphics/sssssb1w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/football-stars-graphics/sssssb1w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/football-stars-graphics/sssssb1w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/football-stars-graphics/sssssb1w"/>
      <lastmod>2026-11-01T21:11:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/football-stars-graphics/sssssb1w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/football-stars-graphics/sssssb1w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/football-stars-graphics/sssssb1w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/football-stars-graphics/sssssb1w"/>
      <lastmod>2026-11-01T21:11:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/points-on-curves-animation-of-parametric-curves-with-tangent-and-curvature-vect/sssssb16</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-on-curves-animation-of-parametric-curves-with-tangent-and-curvature-vect/sssssb16"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-on-curves-animation-of-parametric-curves-with-tangent-and-curvature-vect/sssssb16"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-on-curves-animation-of-parametric-curves-with-tangent-and-curvature-vect/sssssb16"/>
      <lastmod>2026-11-02T14:51:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/points-on-curves-animation-of-parametric-curves-with-tangent-and-curvature-vect/sssssb16</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-on-curves-animation-of-parametric-curves-with-tangent-and-curvature-vect/sssssb16"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-on-curves-animation-of-parametric-curves-with-tangent-and-curvature-vect/sssssb16"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-on-curves-animation-of-parametric-curves-with-tangent-and-curvature-vect/sssssb16"/>
      <lastmod>2026-11-02T14:51:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-problem-02/sssssb1g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-problem-02/sssssb1g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-problem-02/sssssb1g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-problem-02/sssssb1g"/>
      <lastmod>2026-11-02T03:04:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-problem-02/sssssb1g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-problem-02/sssssb1g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-problem-02/sssssb1g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-problem-02/sssssb1g"/>
      <lastmod>2026-11-02T03:04:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/centroid-of-three-vectors/sssssb19</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-of-three-vectors/sssssb19"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-of-three-vectors/sssssb19"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-of-three-vectors/sssssb19"/>
      <lastmod>2026-11-01T23:29:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/centroid-of-three-vectors/sssssb19</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-of-three-vectors/sssssb19"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-of-three-vectors/sssssb19"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-of-three-vectors/sssssb19"/>
      <lastmod>2026-11-01T23:29:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-and-classifying-critical-points-with-hessian-matrix-by-roman-chijner/sssssb1e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-and-classifying-critical-points-with-hessian-matrix-by-roman-chijner/sssssb1e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-and-classifying-critical-points-with-hessian-matrix-by-roman-chijner/sssssb1e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-and-classifying-critical-points-with-hessian-matrix-by-roman-chijner/sssssb1e"/>
      <lastmod>2026-11-02T18:26:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-and-classifying-critical-points-with-hessian-matrix-by-roman-chijner/sssssb1e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-and-classifying-critical-points-with-hessian-matrix-by-roman-chijner/sssssb1e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-and-classifying-critical-points-with-hessian-matrix-by-roman-chijner/sssssb1e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-and-classifying-critical-points-with-hessian-matrix-by-roman-chijner/sssssb1e"/>
      <lastmod>2026-11-02T18:26:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/example-qf-2-3/sssssb1v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-qf-2-3/sssssb1v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-qf-2-3/sssssb1v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-qf-2-3/sssssb1v"/>
      <lastmod>2026-11-02T00:10:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/example-qf-2-3/sssssb1v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-qf-2-3/sssssb1v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-qf-2-3/sssssb1v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-qf-2-3/sssssb1v"/>
      <lastmod>2026-11-02T00:10:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-puzzle/sssssb14</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-puzzle/sssssb14"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-puzzle/sssssb14"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-puzzle/sssssb14"/>
      <lastmod>2026-11-02T17:05:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-puzzle/sssssb14</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-puzzle/sssssb14"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-puzzle/sssssb14"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-puzzle/sssssb14"/>
      <lastmod>2026-11-02T17:05:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pair-of-straight-lines-in-double-end-cone/sssssb1l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pair-of-straight-lines-in-double-end-cone/sssssb1l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pair-of-straight-lines-in-double-end-cone/sssssb1l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pair-of-straight-lines-in-double-end-cone/sssssb1l"/>
      <lastmod>2026-11-02T16:45:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pair-of-straight-lines-in-double-end-cone/sssssb1l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pair-of-straight-lines-in-double-end-cone/sssssb1l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pair-of-straight-lines-in-double-end-cone/sssssb1l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pair-of-straight-lines-in-double-end-cone/sssssb1l"/>
      <lastmod>2026-11-02T16:45:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-diagram-of-trigonometric-ratios/sssssb1y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-diagram-of-trigonometric-ratios/sssssb1y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-diagram-of-trigonometric-ratios/sssssb1y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-diagram-of-trigonometric-ratios/sssssb1y"/>
      <lastmod>2026-11-01T21:16:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-diagram-of-trigonometric-ratios/sssssb1y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-diagram-of-trigonometric-ratios/sssssb1y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-diagram-of-trigonometric-ratios/sssssb1y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-diagram-of-trigonometric-ratios/sssssb1y"/>
      <lastmod>2026-11-01T21:16:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-transformations-by-michael-powers/sssssb1a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-transformations-by-michael-powers/sssssb1a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-transformations-by-michael-powers/sssssb1a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-transformations-by-michael-powers/sssssb1a"/>
      <lastmod>2026-11-02T02:15:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-transformations-by-michael-powers/sssssb1a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-transformations-by-michael-powers/sssssb1a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-transformations-by-michael-powers/sssssb1a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-transformations-by-michael-powers/sssssb1a"/>
      <lastmod>2026-11-02T02:15:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/velocity-addition-i/sssssb1c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/velocity-addition-i/sssssb1c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/velocity-addition-i/sssssb1c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/velocity-addition-i/sssssb1c"/>
      <lastmod>2026-11-02T17:53:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/velocity-addition-i/sssssb1c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/velocity-addition-i/sssssb1c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/velocity-addition-i/sssssb1c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/velocity-addition-i/sssssb1c"/>
      <lastmod>2026-11-02T17:53:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demonstration-of-vectors-and-vector-operations/sssssb1r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-vectors-and-vector-operations/sssssb1r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-vectors-and-vector-operations/sssssb1r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-vectors-and-vector-operations/sssssb1r"/>
      <lastmod>2026-11-02T17:34:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demonstration-of-vectors-and-vector-operations/sssssb1r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-vectors-and-vector-operations/sssssb1r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-vectors-and-vector-operations/sssssb1r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-vectors-and-vector-operations/sssssb1r"/>
      <lastmod>2026-11-02T17:34:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-symmetry-demonstration/sssssb1h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-symmetry-demonstration/sssssb1h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-symmetry-demonstration/sssssb1h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-symmetry-demonstration/sssssb1h"/>
      <lastmod>2026-11-01T21:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-symmetry-demonstration/sssssb1h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-symmetry-demonstration/sssssb1h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-symmetry-demonstration/sssssb1h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-symmetry-demonstration/sssssb1h"/>
      <lastmod>2026-11-01T21:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-an-equation-for-variable-h-step-by-step-formula-derivation/sssssb1t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-an-equation-for-variable-h-step-by-step-formula-derivation/sssssb1t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-an-equation-for-variable-h-step-by-step-formula-derivation/sssssb1t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-an-equation-for-variable-h-step-by-step-formula-derivation/sssssb1t"/>
      <lastmod>2026-11-01T20:55:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-an-equation-for-variable-h-step-by-step-formula-derivation/sssssb1t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-an-equation-for-variable-h-step-by-step-formula-derivation/sssssb1t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-an-equation-for-variable-h-step-by-step-formula-derivation/sssssb1t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-an-equation-for-variable-h-step-by-step-formula-derivation/sssssb1t"/>
      <lastmod>2026-11-01T20:55:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-area-and-partial-volume-in-2d-by-ron-van-den-burg-3/sssssb1x</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-3/sssssb1x"/>
      <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-3/sssssb1x"/>
      <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-3/sssssb1x"/>
      <lastmod>2026-11-02T14:55:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-area-and-partial-volume-in-2d-by-ron-van-den-burg-3/sssssb1x</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-3/sssssb1x"/>
      <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-3/sssssb1x"/>
      <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-3/sssssb1x"/>
      <lastmod>2026-11-02T14:55:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-and-derivatives-demo/sssssb1i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-and-derivatives-demo/sssssb1i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-and-derivatives-demo/sssssb1i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-and-derivatives-demo/sssssb1i"/>
      <lastmod>2026-11-02T17:37:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-and-derivatives-demo/sssssb1i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-and-derivatives-demo/sssssb1i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-and-derivatives-demo/sssssb1i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-and-derivatives-demo/sssssb1i"/>
      <lastmod>2026-11-02T17:37:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/r-0-limit-construction-from-circle-to-point-and-geometric-exploration/sssssb1o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/r-0-limit-construction-from-circle-to-point-and-geometric-exploration/sssssb1o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/r-0-limit-construction-from-circle-to-point-and-geometric-exploration/sssssb1o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/r-0-limit-construction-from-circle-to-point-and-geometric-exploration/sssssb1o"/>
      <lastmod>2026-11-02T18:08:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/r-0-limit-construction-from-circle-to-point-and-geometric-exploration/sssssb1o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/r-0-limit-construction-from-circle-to-point-and-geometric-exploration/sssssb1o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/r-0-limit-construction-from-circle-to-point-and-geometric-exploration/sssssb1o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/r-0-limit-construction-from-circle-to-point-and-geometric-exploration/sssssb1o"/>
      <lastmod>2026-11-02T18:08:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draggable-bar-for-bar-chart-etc-demo/sssssbms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draggable-bar-for-bar-chart-etc-demo/sssssbms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draggable-bar-for-bar-chart-etc-demo/sssssbms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draggable-bar-for-bar-chart-etc-demo/sssssbms"/>
      <lastmod>2026-11-01T21:35:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draggable-bar-for-bar-chart-etc-demo/sssssbms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draggable-bar-for-bar-chart-etc-demo/sssssbms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draggable-bar-for-bar-chart-etc-demo/sssssbms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draggable-bar-for-bar-chart-etc-demo/sssssbms"/>
      <lastmod>2026-11-01T21:35:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-harmonic-motion/sssssbm7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-harmonic-motion/sssssbm7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-harmonic-motion/sssssbm7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-harmonic-motion/sssssbm7"/>
      <lastmod>2026-11-02T18:47:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-harmonic-motion/sssssbm7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-harmonic-motion/sssssbm7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-harmonic-motion/sssssbm7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-harmonic-motion/sssssbm7"/>
      <lastmod>2026-11-02T18:47:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-geometric-patterns-gonbad-e-sork/sssssbmn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-gonbad-e-sork/sssssbmn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-patterns-gonbad-e-sork/sssssbmn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-gonbad-e-sork/sssssbmn"/>
      <lastmod>2026-11-02T10:39:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-geometric-patterns-gonbad-e-sork/sssssbmn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-gonbad-e-sork/sssssbmn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-patterns-gonbad-e-sork/sssssbmn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-gonbad-e-sork/sssssbmn"/>
      <lastmod>2026-11-02T10:39:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-and-geometric-properties-demo/sssssbm2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-geometric-properties-demo/sssssbm2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-geometric-properties-demo/sssssbm2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-geometric-properties-demo/sssssbm2"/>
      <lastmod>2026-11-01T23:57:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-and-geometric-properties-demo/sssssbm2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-geometric-properties-demo/sssssbm2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-geometric-properties-demo/sssssbm2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-geometric-properties-demo/sssssbm2"/>
      <lastmod>2026-11-01T23:57:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangles-based-on-a-point/sssssbmk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangles-based-on-a-point/sssssbmk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangles-based-on-a-point/sssssbmk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangles-based-on-a-point/sssssbmk"/>
      <lastmod>2026-11-02T13:14:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangles-based-on-a-point/sssssbmk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangles-based-on-a-point/sssssbmk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangles-based-on-a-point/sssssbmk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangles-based-on-a-point/sssssbmk"/>
      <lastmod>2026-11-02T13:14:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-at-a-point-demo/sssssbmz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-at-a-point-demo/sssssbmz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-at-a-point-demo/sssssbmz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-at-a-point-demo/sssssbmz"/>
      <lastmod>2026-11-02T14:57:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-at-a-point-demo/sssssbmz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-at-a-point-demo/sssssbmz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-at-a-point-demo/sssssbmz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-at-a-point-demo/sssssbmz"/>
      <lastmod>2026-11-02T14:57:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cylinder-by-katie-davidson/sssssbm0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder-by-katie-davidson/sssssbm0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder-by-katie-davidson/sssssbm0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder-by-katie-davidson/sssssbm0"/>
      <lastmod>2026-11-02T18:19:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cylinder-by-katie-davidson/sssssbm0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder-by-katie-davidson/sssssbm0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder-by-katie-davidson/sssssbm0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder-by-katie-davidson/sssssbm0"/>
      <lastmod>2026-11-02T18:19:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-sas-construction-and-properties/sssssbmd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-sas-construction-and-properties/sssssbmd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-sas-construction-and-properties/sssssbmd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-sas-construction-and-properties/sssssbmd"/>
      <lastmod>2026-11-02T00:28:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-sas-construction-and-properties/sssssbmd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-sas-construction-and-properties/sssssbmd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-sas-construction-and-properties/sssssbmd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-sas-construction-and-properties/sssssbmd"/>
      <lastmod>2026-11-02T00:28:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/iterated-function-system-with-affine-maps-by-jos-manuel-dos-santos-dos-santos/sssssbmf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/iterated-function-system-with-affine-maps-by-jos-manuel-dos-santos-dos-santos/sssssbmf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/iterated-function-system-with-affine-maps-by-jos-manuel-dos-santos-dos-santos/sssssbmf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/iterated-function-system-with-affine-maps-by-jos-manuel-dos-santos-dos-santos/sssssbmf"/>
      <lastmod>2026-11-02T08:38:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/iterated-function-system-with-affine-maps-by-jos-manuel-dos-santos-dos-santos/sssssbmf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/iterated-function-system-with-affine-maps-by-jos-manuel-dos-santos-dos-santos/sssssbmf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/iterated-function-system-with-affine-maps-by-jos-manuel-dos-santos-dos-santos/sssssbmf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/iterated-function-system-with-affine-maps-by-jos-manuel-dos-santos-dos-santos/sssssbmf"/>
      <lastmod>2026-11-02T08:38:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-dance-on-a-hexagonal-grid/sssssbm8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-dance-on-a-hexagonal-grid/sssssbm8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-dance-on-a-hexagonal-grid/sssssbm8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-dance-on-a-hexagonal-grid/sssssbm8"/>
      <lastmod>2026-11-01T20:43:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-dance-on-a-hexagonal-grid/sssssbm8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-dance-on-a-hexagonal-grid/sssssbm8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-dance-on-a-hexagonal-grid/sssssbm8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-dance-on-a-hexagonal-grid/sssssbm8"/>
      <lastmod>2026-11-01T20:43:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/t-estimate-of-a-mean/sssssbmu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/t-estimate-of-a-mean/sssssbmu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/t-estimate-of-a-mean/sssssbmu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/t-estimate-of-a-mean/sssssbmu"/>
      <lastmod>2026-11-02T16:30:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/t-estimate-of-a-mean/sssssbmu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/t-estimate-of-a-mean/sssssbmu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/t-estimate-of-a-mean/sssssbmu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/t-estimate-of-a-mean/sssssbmu"/>
      <lastmod>2026-11-02T16:30:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factoring-quadratics-geometric-and-algebraic-approach/sssssbm5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-quadratics-geometric-and-algebraic-approach/sssssbm5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-quadratics-geometric-and-algebraic-approach/sssssbm5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-quadratics-geometric-and-algebraic-approach/sssssbm5"/>
      <lastmod>2026-11-02T02:43:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factoring-quadratics-geometric-and-algebraic-approach/sssssbm5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-quadratics-geometric-and-algebraic-approach/sssssbm5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-quadratics-geometric-and-algebraic-approach/sssssbm5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-quadratics-geometric-and-algebraic-approach/sssssbm5"/>
      <lastmod>2026-11-02T02:43:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logistic-growth-function-zhaw-hs2018-exercise-6/sssssbmb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logistic-growth-function-zhaw-hs2018-exercise-6/sssssbmb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logistic-growth-function-zhaw-hs2018-exercise-6/sssssbmb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logistic-growth-function-zhaw-hs2018-exercise-6/sssssbmb"/>
      <lastmod>2026-11-01T21:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logistic-growth-function-zhaw-hs2018-exercise-6/sssssbmb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logistic-growth-function-zhaw-hs2018-exercise-6/sssssbmb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logistic-growth-function-zhaw-hs2018-exercise-6/sssssbmb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logistic-growth-function-zhaw-hs2018-exercise-6/sssssbmb"/>
      <lastmod>2026-11-01T21:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-experimental-results/sssssbm3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-experimental-results/sssssbm3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-experimental-results/sssssbm3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-experimental-results/sssssbm3"/>
      <lastmod>2026-11-01T21:51:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-experimental-results/sssssbm3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-experimental-results/sssssbm3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-experimental-results/sssssbm3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-experimental-results/sssssbm3"/>
      <lastmod>2026-11-01T21:51:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-volume-exploration-solid-geometry-with-polygon-base/sssssbmq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-exploration-solid-geometry-with-polygon-base/sssssbmq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-exploration-solid-geometry-with-polygon-base/sssssbmq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-exploration-solid-geometry-with-polygon-base/sssssbmq"/>
      <lastmod>2026-11-02T00:05:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-volume-exploration-solid-geometry-with-polygon-base/sssssbmq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-exploration-solid-geometry-with-polygon-base/sssssbmq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-exploration-solid-geometry-with-polygon-base/sssssbmq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-exploration-solid-geometry-with-polygon-base/sssssbmq"/>
      <lastmod>2026-11-02T00:05:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploration-of-function-continuity-at-x-a/sssssbm1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-of-function-continuity-at-x-a/sssssbm1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-of-function-continuity-at-x-a/sssssbm1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-of-function-continuity-at-x-a/sssssbm1"/>
      <lastmod>2026-11-02T12:22:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploration-of-function-continuity-at-x-a/sssssbm1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-of-function-continuity-at-x-a/sssssbm1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-of-function-continuity-at-x-a/sssssbm1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-of-function-continuity-at-x-a/sssssbm1"/>
      <lastmod>2026-11-02T12:22:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-sine-wave-2/sssssbmm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-wave-2/sssssbmm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-wave-2/sssssbmm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-wave-2/sssssbmm"/>
      <lastmod>2026-11-02T00:03:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-sine-wave-2/sssssbmm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-wave-2/sssssbmm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-wave-2/sssssbmm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-wave-2/sssssbmm"/>
      <lastmod>2026-11-02T00:03:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/natural-numbers-and-polygon-construction/sssssbmj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/natural-numbers-and-polygon-construction/sssssbmj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/natural-numbers-and-polygon-construction/sssssbmj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/natural-numbers-and-polygon-construction/sssssbmj"/>
      <lastmod>2026-11-02T11:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/natural-numbers-and-polygon-construction/sssssbmj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/natural-numbers-and-polygon-construction/sssssbmj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/natural-numbers-and-polygon-construction/sssssbmj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/natural-numbers-and-polygon-construction/sssssbmj"/>
      <lastmod>2026-11-02T11:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-congruence-demo-by-billy-kuehnel/sssssbmp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-demo-by-billy-kuehnel/sssssbmp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-demo-by-billy-kuehnel/sssssbmp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-demo-by-billy-kuehnel/sssssbmp"/>
      <lastmod>2026-11-02T17:14:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-congruence-demo-by-billy-kuehnel/sssssbmp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-demo-by-billy-kuehnel/sssssbmp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-demo-by-billy-kuehnel/sssssbmp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-demo-by-billy-kuehnel/sssssbmp"/>
      <lastmod>2026-11-02T17:14:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-and-paul-cezanne-painting-style/sssssbmw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-paul-cezanne-painting-style/sssssbmw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-paul-cezanne-painting-style/sssssbmw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-paul-cezanne-painting-style/sssssbmw"/>
      <lastmod>2026-11-02T17:44:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-and-paul-cezanne-painting-style/sssssbmw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-paul-cezanne-painting-style/sssssbmw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-paul-cezanne-painting-style/sssssbmw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-paul-cezanne-painting-style/sssssbmw"/>
      <lastmod>2026-11-02T17:44:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simplifying-exponents-with-a-rational-expression/sssssbm6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplifying-exponents-with-a-rational-expression/sssssbm6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplifying-exponents-with-a-rational-expression/sssssbm6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplifying-exponents-with-a-rational-expression/sssssbm6"/>
      <lastmod>2026-11-02T16:43:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simplifying-exponents-with-a-rational-expression/sssssbm6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplifying-exponents-with-a-rational-expression/sssssbm6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplifying-exponents-with-a-rational-expression/sssssbm6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplifying-exponents-with-a-rational-expression/sssssbm6"/>
      <lastmod>2026-11-02T16:43:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sample-sizes-to-estimate-a-population-mean/sssssbmg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-sizes-to-estimate-a-population-mean/sssssbmg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-sizes-to-estimate-a-population-mean/sssssbmg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-sizes-to-estimate-a-population-mean/sssssbmg"/>
      <lastmod>2026-11-02T00:03:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sample-sizes-to-estimate-a-population-mean/sssssbmg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-sizes-to-estimate-a-population-mean/sssssbmg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-sizes-to-estimate-a-population-mean/sssssbmg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-sizes-to-estimate-a-population-mean/sssssbmg"/>
      <lastmod>2026-11-02T00:03:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-logarithms/sssssbm9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-logarithms/sssssbm9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-logarithms/sssssbm9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-logarithms/sssssbm9"/>
      <lastmod>2026-11-02T13:34:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-logarithms/sssssbm9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-logarithms/sssssbm9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-logarithms/sssssbm9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-logarithms/sssssbm9"/>
      <lastmod>2026-11-02T13:34:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-theorem-on-regular-n-gons-n-is-even/sssssbme</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-theorem-on-regular-n-gons-n-is-even/sssssbme"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-theorem-on-regular-n-gons-n-is-even/sssssbme"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-theorem-on-regular-n-gons-n-is-even/sssssbme"/>
      <lastmod>2026-11-02T16:36:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-theorem-on-regular-n-gons-n-is-even/sssssbme</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-theorem-on-regular-n-gons-n-is-even/sssssbme"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-theorem-on-regular-n-gons-n-is-even/sssssbme"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-theorem-on-regular-n-gons-n-is-even/sssssbme"/>
      <lastmod>2026-11-02T16:36:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/product-rule-for-exponents-practice-ns1-02-cyu3/sssssbmv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/product-rule-for-exponents-practice-ns1-02-cyu3/sssssbmv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/product-rule-for-exponents-practice-ns1-02-cyu3/sssssbmv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/product-rule-for-exponents-practice-ns1-02-cyu3/sssssbmv"/>
      <lastmod>2026-11-02T00:30:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/product-rule-for-exponents-practice-ns1-02-cyu3/sssssbmv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/product-rule-for-exponents-practice-ns1-02-cyu3/sssssbmv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/product-rule-for-exponents-practice-ns1-02-cyu3/sssssbmv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/product-rule-for-exponents-practice-ns1-02-cyu3/sssssbmv"/>
      <lastmod>2026-11-02T00:30:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-integral-visualization/sssssbm4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-integral-visualization/sssssbm4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-integral-visualization/sssssbm4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-integral-visualization/sssssbm4"/>
      <lastmod>2026-11-02T16:53:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-integral-visualization/sssssbm4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-integral-visualization/sssssbm4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-integral-visualization/sssssbm4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-integral-visualization/sssssbm4"/>
      <lastmod>2026-11-02T16:53:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/substitute-solution-to-equation/sssssbml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/substitute-solution-to-equation/sssssbml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/substitute-solution-to-equation/sssssbml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/substitute-solution-to-equation/sssssbml"/>
      <lastmod>2026-11-02T13:39:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/substitute-solution-to-equation/sssssbml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/substitute-solution-to-equation/sssssbml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/substitute-solution-to-equation/sssssbml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/substitute-solution-to-equation/sssssbml"/>
      <lastmod>2026-11-02T13:39:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/write-an-equation-of-a-line-from-a-graph/sssssbmy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-an-equation-of-a-line-from-a-graph/sssssbmy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-an-equation-of-a-line-from-a-graph/sssssbmy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-an-equation-of-a-line-from-a-graph/sssssbmy"/>
      <lastmod>2026-11-01T21:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/write-an-equation-of-a-line-from-a-graph/sssssbmy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-an-equation-of-a-line-from-a-graph/sssssbmy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-an-equation-of-a-line-from-a-graph/sssssbmy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-an-equation-of-a-line-from-a-graph/sssssbmy"/>
      <lastmod>2026-11-01T21:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-deviation-of-sample-means-demo/sssssbma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-of-sample-means-demo/sssssbma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-of-sample-means-demo/sssssbma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-of-sample-means-demo/sssssbma"/>
      <lastmod>2026-11-01T21:11:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-deviation-of-sample-means-demo/sssssbma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-of-sample-means-demo/sssssbma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-of-sample-means-demo/sssssbma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-of-sample-means-demo/sssssbma"/>
      <lastmod>2026-11-01T21:11:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertex-form-exploration/sssssbmc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form-exploration/sssssbmc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form-exploration/sssssbmc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form-exploration/sssssbmc"/>
      <lastmod>2026-11-01T21:07:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertex-form-exploration/sssssbmc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form-exploration/sssssbmc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form-exploration/sssssbmc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form-exploration/sssssbmc"/>
      <lastmod>2026-11-01T21:07:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-rate-of-increase/sssssbmr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-rate-of-increase/sssssbmr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-exponential-functions-rate-of-increase/sssssbmr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-rate-of-increase/sssssbmr"/>
      <lastmod>2026-11-02T17:46:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphs-of-exponential-functions-rate-of-increase/sssssbmr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-rate-of-increase/sssssbmr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-exponential-functions-rate-of-increase/sssssbmr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-rate-of-increase/sssssbmr"/>
      <lastmod>2026-11-02T17:46:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gogeometry-action-128-dynamic-and-modifiable-geometry-calculus-illustration/sssssbmh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-128-dynamic-and-modifiable-geometry-calculus-illustration/sssssbmh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gogeometry-action-128-dynamic-and-modifiable-geometry-calculus-illustration/sssssbmh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gogeometry-action-128-dynamic-and-modifiable-geometry-calculus-illustration/sssssbmh"/>
      <lastmod>2026-11-02T16:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gogeometry-action-128-dynamic-and-modifiable-geometry-calculus-illustration/sssssbmh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-128-dynamic-and-modifiable-geometry-calculus-illustration/sssssbmh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gogeometry-action-128-dynamic-and-modifiable-geometry-calculus-illustration/sssssbmh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gogeometry-action-128-dynamic-and-modifiable-geometry-calculus-illustration/sssssbmh"/>
      <lastmod>2026-11-02T16:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-multiplication-number-line-model/sssssbmt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-number-line-model/sssssbmt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-number-line-model/sssssbmt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-number-line-model/sssssbmt"/>
      <lastmod>2026-11-01T21:27:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-multiplication-number-line-model/sssssbmt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-number-line-model/sssssbmt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-number-line-model/sssssbmt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-number-line-model/sssssbmt"/>
      <lastmod>2026-11-01T21:27:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-mapping-diagram-coordinate-geometry-demo/sssssbmx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-mapping-diagram-coordinate-geometry-demo/sssssbmx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-mapping-diagram-coordinate-geometry-demo/sssssbmx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-mapping-diagram-coordinate-geometry-demo/sssssbmx"/>
      <lastmod>2026-11-02T16:53:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-mapping-diagram-coordinate-geometry-demo/sssssbmx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-mapping-diagram-coordinate-geometry-demo/sssssbmx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-mapping-diagram-coordinate-geometry-demo/sssssbmx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-mapping-diagram-coordinate-geometry-demo/sssssbmx"/>
      <lastmod>2026-11-02T16:53:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-brooke-skelly/sssssbmi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-brooke-skelly/sssssbmi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-rectangles-and-squares-by-brooke-skelly/sssssbmi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-brooke-skelly/sssssbmi"/>
      <lastmod>2026-11-02T18:40:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-rectangles-and-squares-by-brooke-skelly/sssssbmi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-brooke-skelly/sssssbmi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-rectangles-and-squares-by-brooke-skelly/sssssbmi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-brooke-skelly/sssssbmi"/>
      <lastmod>2026-11-02T18:40:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/degree-to-radian-and-radian-to-degree-quiz-question-generator/sssssbmo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/degree-to-radian-and-radian-to-degree-quiz-question-generator/sssssbmo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/degree-to-radian-and-radian-to-degree-quiz-question-generator/sssssbmo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/degree-to-radian-and-radian-to-degree-quiz-question-generator/sssssbmo"/>
      <lastmod>2026-11-02T18:50:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/degree-to-radian-and-radian-to-degree-quiz-question-generator/sssssbmo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/degree-to-radian-and-radian-to-degree-quiz-question-generator/sssssbmo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/degree-to-radian-and-radian-to-degree-quiz-question-generator/sssssbmo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/degree-to-radian-and-radian-to-degree-quiz-question-generator/sssssbmo"/>
      <lastmod>2026-11-02T18:50:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scatter-plot-and-correlation/sssssbjs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scatter-plot-and-correlation/sssssbjs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scatter-plot-and-correlation/sssssbjs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scatter-plot-and-correlation/sssssbjs"/>
      <lastmod>2026-11-02T03:00:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scatter-plot-and-correlation/sssssbjs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scatter-plot-and-correlation/sssssbjs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scatter-plot-and-correlation/sssssbjs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scatter-plot-and-correlation/sssssbjs"/>
      <lastmod>2026-11-02T03:00:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploration-of-the-inner-triangle/sssssbj7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-of-the-inner-triangle/sssssbj7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-of-the-inner-triangle/sssssbj7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-of-the-inner-triangle/sssssbj7"/>
      <lastmod>2026-11-01T21:33:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploration-of-the-inner-triangle/sssssbj7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-of-the-inner-triangle/sssssbj7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-of-the-inner-triangle/sssssbj7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-of-the-inner-triangle/sssssbj7"/>
      <lastmod>2026-11-01T21:33:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-right-triangles-by-j-edward-ladenburger/sssssbjn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-j-edward-ladenburger/sssssbjn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles-by-j-edward-ladenburger/sssssbjn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-j-edward-ladenburger/sssssbjn"/>
      <lastmod>2026-11-02T12:38:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-right-triangles-by-j-edward-ladenburger/sssssbjn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-j-edward-ladenburger/sssssbjn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles-by-j-edward-ladenburger/sssssbjn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-j-edward-ladenburger/sssssbjn"/>
      <lastmod>2026-11-02T12:38:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/xor-gate/sssssbj2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/xor-gate/sssssbj2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/xor-gate/sssssbj2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/xor-gate/sssssbj2"/>
      <lastmod>2026-11-01T19:29:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/xor-gate/sssssbj2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/xor-gate/sssssbj2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/xor-gate/sssssbj2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/xor-gate/sssssbj2"/>
      <lastmod>2026-11-01T19:29:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-division-3-a-b-grouping/sssssbjk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-3-a-b-grouping/sssssbjk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-3-a-b-grouping/sssssbjk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-3-a-b-grouping/sssssbjk"/>
      <lastmod>2026-11-02T09:38:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-division-3-a-b-grouping/sssssbjk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-3-a-b-grouping/sssssbjk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-3-a-b-grouping/sssssbjk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-3-a-b-grouping/sssssbjk"/>
      <lastmod>2026-11-02T09:38:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gram-schmidt-orthogonalization-and-qr-decomposition/sssssbjz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gram-schmidt-orthogonalization-and-qr-decomposition/sssssbjz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gram-schmidt-orthogonalization-and-qr-decomposition/sssssbjz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gram-schmidt-orthogonalization-and-qr-decomposition/sssssbjz"/>
      <lastmod>2026-11-01T21:24:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gram-schmidt-orthogonalization-and-qr-decomposition/sssssbjz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gram-schmidt-orthogonalization-and-qr-decomposition/sssssbjz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gram-schmidt-orthogonalization-and-qr-decomposition/sssssbjz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gram-schmidt-orthogonalization-and-qr-decomposition/sssssbjz"/>
      <lastmod>2026-11-01T21:24:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bee-pollen-collection-greedy-algorithm-visualization/sssssbj0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bee-pollen-collection-greedy-algorithm-visualization/sssssbj0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bee-pollen-collection-greedy-algorithm-visualization/sssssbj0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bee-pollen-collection-greedy-algorithm-visualization/sssssbj0"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bee-pollen-collection-greedy-algorithm-visualization/sssssbj0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bee-pollen-collection-greedy-algorithm-visualization/sssssbj0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bee-pollen-collection-greedy-algorithm-visualization/sssssbj0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bee-pollen-collection-greedy-algorithm-visualization/sssssbj0"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-matrix-demonstration/sssssbjd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-matrix-demonstration/sssssbjd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-matrix-demonstration/sssssbjd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-matrix-demonstration/sssssbjd"/>
      <lastmod>2026-11-02T17:05:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-matrix-demonstration/sssssbjd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-matrix-demonstration/sssssbjd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-matrix-demonstration/sssssbjd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-matrix-demonstration/sssssbjd"/>
      <lastmod>2026-11-02T17:05:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-a-linear-system-by-substitution/sssssbjf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-a-linear-system-by-substitution/sssssbjf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-a-linear-system-by-substitution/sssssbjf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-a-linear-system-by-substitution/sssssbjf"/>
      <lastmod>2026-11-01T23:30:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-a-linear-system-by-substitution/sssssbjf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-a-linear-system-by-substitution/sssssbjf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-a-linear-system-by-substitution/sssssbjf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-a-linear-system-by-substitution/sssssbjf"/>
      <lastmod>2026-11-01T23:30:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solid-geometry-exploring-nets-of-solids/sssssbj8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solid-geometry-exploring-nets-of-solids/sssssbj8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solid-geometry-exploring-nets-of-solids/sssssbj8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solid-geometry-exploring-nets-of-solids/sssssbj8"/>
      <lastmod>2026-11-02T18:53:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solid-geometry-exploring-nets-of-solids/sssssbj8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solid-geometry-exploring-nets-of-solids/sssssbj8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solid-geometry-exploring-nets-of-solids/sssssbj8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solid-geometry-exploring-nets-of-solids/sssssbj8"/>
      <lastmod>2026-11-02T18:53:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-trig-ratios-by-d-wilson/sssssbju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-trig-ratios-by-d-wilson/sssssbju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-trig-ratios-by-d-wilson/sssssbju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-trig-ratios-by-d-wilson/sssssbju"/>
      <lastmod>2026-11-02T17:36:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-trig-ratios-by-d-wilson/sssssbju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-trig-ratios-by-d-wilson/sssssbju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-trig-ratios-by-d-wilson/sssssbju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-trig-ratios-by-d-wilson/sssssbju"/>
      <lastmod>2026-11-02T17:36:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-fractional-equations/sssssbj5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-fractional-equations/sssssbj5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-fractional-equations/sssssbj5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-fractional-equations/sssssbj5"/>
      <lastmod>2026-11-02T09:58:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-fractional-equations/sssssbj5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-fractional-equations/sssssbj5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-fractional-equations/sssssbj5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-fractional-equations/sssssbj5"/>
      <lastmod>2026-11-02T09:58:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-demo/sssssbjb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-demo/sssssbjb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-polygons-demo/sssssbjb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-demo/sssssbjb"/>
      <lastmod>2026-11-01T20:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angles-of-polygons-demo/sssssbjb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-demo/sssssbjb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-polygons-demo/sssssbjb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-demo/sssssbjb"/>
      <lastmod>2026-11-01T20:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-cylinder-by-n-roach/sssssbj3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-n-roach/sssssbj3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cylinder-by-n-roach/sssssbj3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-n-roach/sssssbj3"/>
      <lastmod>2026-11-02T18:16:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-cylinder-by-n-roach/sssssbj3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-n-roach/sssssbj3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cylinder-by-n-roach/sssssbj3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-n-roach/sssssbj3"/>
      <lastmod>2026-11-02T18:16:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-and-integral-calculus/sssssbjq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-and-integral-calculus/sssssbjq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-and-integral-calculus/sssssbjq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-and-integral-calculus/sssssbjq"/>
      <lastmod>2026-11-02T18:14:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-and-integral-calculus/sssssbjq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-and-integral-calculus/sssssbjq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-and-integral-calculus/sssssbjq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-and-integral-calculus/sssssbjq"/>
      <lastmod>2026-11-02T18:14:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-machine-by-lew-w-s/sssssbj1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-machine-by-lew-w-s/sssssbj1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-machine-by-lew-w-s/sssssbj1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-machine-by-lew-w-s/sssssbj1"/>
      <lastmod>2026-11-02T16:31:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-machine-by-lew-w-s/sssssbj1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-machine-by-lew-w-s/sssssbj1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-machine-by-lew-w-s/sssssbj1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-machine-by-lew-w-s/sssssbj1"/>
      <lastmod>2026-11-02T16:31:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimation-and-addition-on-a-number-line/sssssbjm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimation-and-addition-on-a-number-line/sssssbjm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimation-and-addition-on-a-number-line/sssssbjm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimation-and-addition-on-a-number-line/sssssbjm"/>
      <lastmod>2026-11-02T17:43:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimation-and-addition-on-a-number-line/sssssbjm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimation-and-addition-on-a-number-line/sssssbjm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimation-and-addition-on-a-number-line/sssssbjm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimation-and-addition-on-a-number-line/sssssbjm"/>
      <lastmod>2026-11-02T17:43:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-valued-function-derivative-and-tangent-vector-visualization/sssssbjj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-valued-function-derivative-and-tangent-vector-visualization/sssssbjj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-valued-function-derivative-and-tangent-vector-visualization/sssssbjj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-valued-function-derivative-and-tangent-vector-visualization/sssssbjj"/>
      <lastmod>2026-11-02T00:37:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-valued-function-derivative-and-tangent-vector-visualization/sssssbjj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-valued-function-derivative-and-tangent-vector-visualization/sssssbjj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-valued-function-derivative-and-tangent-vector-visualization/sssssbjj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-valued-function-derivative-and-tangent-vector-visualization/sssssbjj"/>
      <lastmod>2026-11-02T00:37:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-representation-of-roots-of-unity/sssssbjp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-representation-of-roots-of-unity/sssssbjp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-representation-of-roots-of-unity/sssssbjp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-representation-of-roots-of-unity/sssssbjp"/>
      <lastmod>2026-11-02T18:26:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-representation-of-roots-of-unity/sssssbjp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-representation-of-roots-of-unity/sssssbjp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-representation-of-roots-of-unity/sssssbjp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-representation-of-roots-of-unity/sssssbjp"/>
      <lastmod>2026-11-02T18:26:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/max-area-for-a-fixed-perimeter/sssssbjw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-area-for-a-fixed-perimeter/sssssbjw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-area-for-a-fixed-perimeter/sssssbjw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-area-for-a-fixed-perimeter/sssssbjw"/>
      <lastmod>2026-11-01T19:26:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/max-area-for-a-fixed-perimeter/sssssbjw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-area-for-a-fixed-perimeter/sssssbjw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-area-for-a-fixed-perimeter/sssssbjw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-area-for-a-fixed-perimeter/sssssbjw"/>
      <lastmod>2026-11-01T19:26:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions-quiz-gc-3-attempts/sssssbj6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-quiz-gc-3-attempts/sssssbj6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-quiz-gc-3-attempts/sssssbj6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-quiz-gc-3-attempts/sssssbj6"/>
      <lastmod>2026-11-01T20:52:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions-quiz-gc-3-attempts/sssssbj6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-quiz-gc-3-attempts/sssssbj6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-quiz-gc-3-attempts/sssssbj6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-quiz-gc-3-attempts/sssssbj6"/>
      <lastmod>2026-11-01T20:52:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/indian-logic-meets-descartes-multiplication-model/sssssbjg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/indian-logic-meets-descartes-multiplication-model/sssssbjg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/indian-logic-meets-descartes-multiplication-model/sssssbjg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/indian-logic-meets-descartes-multiplication-model/sssssbjg"/>
      <lastmod>2026-11-02T17:40:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/indian-logic-meets-descartes-multiplication-model/sssssbjg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/indian-logic-meets-descartes-multiplication-model/sssssbjg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/indian-logic-meets-descartes-multiplication-model/sssssbjg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/indian-logic-meets-descartes-multiplication-model/sssssbjg"/>
      <lastmod>2026-11-02T17:40:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alpha-beta-power-hypothesis-testing/sssssbj9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alpha-beta-power-hypothesis-testing/sssssbj9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alpha-beta-power-hypothesis-testing/sssssbj9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alpha-beta-power-hypothesis-testing/sssssbj9"/>
      <lastmod>2026-11-01T23:52:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alpha-beta-power-hypothesis-testing/sssssbj9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alpha-beta-power-hypothesis-testing/sssssbj9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alpha-beta-power-hypothesis-testing/sssssbj9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alpha-beta-power-hypothesis-testing/sssssbj9"/>
      <lastmod>2026-11-01T23:52:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-trigonometric-functions/sssssbje</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-trigonometric-functions/sssssbje"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-trigonometric-functions/sssssbje"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-trigonometric-functions/sssssbje"/>
      <lastmod>2026-11-02T12:37:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-of-trigonometric-functions/sssssbje</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-trigonometric-functions/sssssbje"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-trigonometric-functions/sssssbje"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-trigonometric-functions/sssssbje"/>
      <lastmod>2026-11-02T12:37:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/deriving-the-area-of-a-trapezoid/sssssbjv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-the-area-of-a-trapezoid/sssssbjv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-the-area-of-a-trapezoid/sssssbjv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-the-area-of-a-trapezoid/sssssbjv"/>
      <lastmod>2026-11-02T07:00:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/deriving-the-area-of-a-trapezoid/sssssbjv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-the-area-of-a-trapezoid/sssssbjv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-the-area-of-a-trapezoid/sssssbjv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-the-area-of-a-trapezoid/sssssbjv"/>
      <lastmod>2026-11-02T07:00:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-orthocenter/sssssbj4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-orthocenter/sssssbj4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-orthocenter/sssssbj4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-orthocenter/sssssbj4"/>
      <lastmod>2026-11-01T23:49:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-orthocenter/sssssbj4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-orthocenter/sssssbj4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-orthocenter/sssssbj4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-orthocenter/sssssbj4"/>
      <lastmod>2026-11-01T23:49:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-the-given-segment/sssssbjl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-the-given-segment/sssssbjl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-the-given-segment/sssssbjl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-the-given-segment/sssssbjl"/>
      <lastmod>2026-11-02T13:03:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-the-given-segment/sssssbjl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-the-given-segment/sssssbjl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-the-given-segment/sssssbjl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-the-given-segment/sssssbjl"/>
      <lastmod>2026-11-02T13:03:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-2/sssssbjy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-2/sssssbjy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-illustration-by-tim-brzezinski-2/sssssbjy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-2/sssssbjy"/>
      <lastmod>2026-11-02T17:38:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometric-illustration-by-tim-brzezinski-2/sssssbjy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-2/sssssbjy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-illustration-by-tim-brzezinski-2/sssssbjy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-2/sssssbjy"/>
      <lastmod>2026-11-02T17:38:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-with-given-perimeter-and-diagonal-by-marina-sinitsky/sssssbja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-with-given-perimeter-and-diagonal-by-marina-sinitsky/sssssbja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-with-given-perimeter-and-diagonal-by-marina-sinitsky/sssssbja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-with-given-perimeter-and-diagonal-by-marina-sinitsky/sssssbja"/>
      <lastmod>2026-11-02T18:55:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-with-given-perimeter-and-diagonal-by-marina-sinitsky/sssssbja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-with-given-perimeter-and-diagonal-by-marina-sinitsky/sssssbja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-with-given-perimeter-and-diagonal-by-marina-sinitsky/sssssbja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-with-given-perimeter-and-diagonal-by-marina-sinitsky/sssssbja"/>
      <lastmod>2026-11-02T18:55:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-the-presbyterian-church-usa-logo/sssssbjc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-presbyterian-church-usa-logo/sssssbjc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-presbyterian-church-usa-logo/sssssbjc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-presbyterian-church-usa-logo/sssssbjc"/>
      <lastmod>2026-11-01T21:01:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-the-presbyterian-church-usa-logo/sssssbjc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-presbyterian-church-usa-logo/sssssbjc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-presbyterian-church-usa-logo/sssssbjc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-presbyterian-church-usa-logo/sssssbjc"/>
      <lastmod>2026-11-01T21:01:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-similar-3d-figures-by-powere/sssssbjr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-similar-3d-figures-by-powere/sssssbjr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-and-surface-areas-of-similar-3d-figures-by-powere/sssssbjr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-similar-3d-figures-by-powere/sssssbjr"/>
      <lastmod>2026-11-02T00:46:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-and-surface-areas-of-similar-3d-figures-by-powere/sssssbjr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-similar-3d-figures-by-powere/sssssbjr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-and-surface-areas-of-similar-3d-figures-by-powere/sssssbjr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-similar-3d-figures-by-powere/sssssbjr"/>
      <lastmod>2026-11-02T00:46:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modes-and-their-chords-in-an-equal-tempered-scale/sssssbjh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modes-and-their-chords-in-an-equal-tempered-scale/sssssbjh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modes-and-their-chords-in-an-equal-tempered-scale/sssssbjh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modes-and-their-chords-in-an-equal-tempered-scale/sssssbjh"/>
      <lastmod>2026-11-02T00:31:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modes-and-their-chords-in-an-equal-tempered-scale/sssssbjh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modes-and-their-chords-in-an-equal-tempered-scale/sssssbjh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modes-and-their-chords-in-an-equal-tempered-scale/sssssbjh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modes-and-their-chords-in-an-equal-tempered-scale/sssssbjh"/>
      <lastmod>2026-11-02T00:31:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roots-and-asymptotes-of-polynomials/sssssbjt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-and-asymptotes-of-polynomials/sssssbjt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-and-asymptotes-of-polynomials/sssssbjt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-and-asymptotes-of-polynomials/sssssbjt"/>
      <lastmod>2026-11-02T17:36:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roots-and-asymptotes-of-polynomials/sssssbjt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-and-asymptotes-of-polynomials/sssssbjt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-and-asymptotes-of-polynomials/sssssbjt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-and-asymptotes-of-polynomials/sssssbjt"/>
      <lastmod>2026-11-02T17:36:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sliceform-of-sin-x-cos-y/sssssbjx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliceform-of-sin-x-cos-y/sssssbjx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliceform-of-sin-x-cos-y/sssssbjx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliceform-of-sin-x-cos-y/sssssbjx"/>
      <lastmod>2026-11-01T19:00:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sliceform-of-sin-x-cos-y/sssssbjx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliceform-of-sin-x-cos-y/sssssbjx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliceform-of-sin-x-cos-y/sssssbjx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliceform-of-sin-x-cos-y/sssssbjx"/>
      <lastmod>2026-11-01T19:00:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-simon/sssssbji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-simon/sssssbji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rectangular-prism-by-simon/sssssbji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-simon/sssssbji"/>
      <lastmod>2026-11-02T13:43:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-rectangular-prism-by-simon/sssssbji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-simon/sssssbji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rectangular-prism-by-simon/sssssbji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-simon/sssssbji"/>
      <lastmod>2026-11-02T13:43:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/determinants-and-area-for-linear-transformations/sssssbjo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determinants-and-area-for-linear-transformations/sssssbjo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determinants-and-area-for-linear-transformations/sssssbjo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determinants-and-area-for-linear-transformations/sssssbjo"/>
      <lastmod>2026-11-02T16:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/determinants-and-area-for-linear-transformations/sssssbjo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determinants-and-area-for-linear-transformations/sssssbjo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determinants-and-area-for-linear-transformations/sssssbjo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determinants-and-area-for-linear-transformations/sssssbjo"/>
      <lastmod>2026-11-02T16:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-solids/sssssbps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-solids/sssssbps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-solids/sssssbps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-solids/sssssbps"/>
      <lastmod>2026-11-02T17:53:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-solids/sssssbps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-solids/sssssbps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-solids/sssssbps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-solids/sssssbps"/>
      <lastmod>2026-11-02T17:53:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-sines-and-cosines-demo/sssssbp7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-sines-and-cosines-demo/sssssbp7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-sines-and-cosines-demo/sssssbp7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-sines-and-cosines-demo/sssssbp7"/>
      <lastmod>2026-11-02T17:49:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-sines-and-cosines-demo/sssssbp7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-sines-and-cosines-demo/sssssbp7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-sines-and-cosines-demo/sssssbp7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-sines-and-cosines-demo/sssssbp7"/>
      <lastmod>2026-11-02T17:49:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-section-of-a-triangular-prism/sssssbpn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-triangular-prism/sssssbpn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-triangular-prism/sssssbpn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-triangular-prism/sssssbpn"/>
      <lastmod>2026-11-01T19:19:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-section-of-a-triangular-prism/sssssbpn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-triangular-prism/sssssbpn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-triangular-prism/sssssbpn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-triangular-prism/sssssbpn"/>
      <lastmod>2026-11-01T19:19:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-rectangular-prisms-demo/sssssbp2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-prisms-demo/sssssbp2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-rectangular-prisms-demo/sssssbp2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-prisms-demo/sssssbp2"/>
      <lastmod>2026-11-01T19:32:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-rectangular-prisms-demo/sssssbp2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-prisms-demo/sssssbp2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-rectangular-prisms-demo/sssssbp2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-prisms-demo/sssssbp2"/>
      <lastmod>2026-11-01T19:32:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/non-convex-robust-pca-with-special-norm/sssssbpk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-convex-robust-pca-with-special-norm/sssssbpk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-convex-robust-pca-with-special-norm/sssssbpk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-convex-robust-pca-with-special-norm/sssssbpk"/>
      <lastmod>2026-11-01T19:24:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/non-convex-robust-pca-with-special-norm/sssssbpk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-convex-robust-pca-with-special-norm/sssssbpk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-convex-robust-pca-with-special-norm/sssssbpk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-convex-robust-pca-with-special-norm/sssssbpk"/>
      <lastmod>2026-11-01T19:24:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-animation-using-vertical-strips/sssssbpz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-animation-using-vertical-strips/sssssbpz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-animation-using-vertical-strips/sssssbpz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-animation-using-vertical-strips/sssssbpz"/>
      <lastmod>2026-11-02T18:21:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-animation-using-vertical-strips/sssssbpz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-animation-using-vertical-strips/sssssbpz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-animation-using-vertical-strips/sssssbpz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-animation-using-vertical-strips/sssssbpz"/>
      <lastmod>2026-11-02T18:21:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-and-properties-of-triangle-altitudes/sssssbp0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-and-properties-of-triangle-altitudes/sssssbp0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-and-properties-of-triangle-altitudes/sssssbp0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-and-properties-of-triangle-altitudes/sssssbp0"/>
      <lastmod>2026-11-02T18:12:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-and-properties-of-triangle-altitudes/sssssbp0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-and-properties-of-triangle-altitudes/sssssbp0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-and-properties-of-triangle-altitudes/sssssbp0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-and-properties-of-triangle-altitudes/sssssbp0"/>
      <lastmod>2026-11-02T18:12:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratio-of-perimeters-and-area/sssssbpd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-of-perimeters-and-area/sssssbpd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-of-perimeters-and-area/sssssbpd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-of-perimeters-and-area/sssssbpd"/>
      <lastmod>2026-11-01T21:40:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratio-of-perimeters-and-area/sssssbpd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-of-perimeters-and-area/sssssbpd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-of-perimeters-and-area/sssssbpd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-of-perimeters-and-area/sssssbpd"/>
      <lastmod>2026-11-01T21:40:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-revolution-demo/sssssbpf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-revolution-demo/sssssbpf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-revolution-demo/sssssbpf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-revolution-demo/sssssbpf"/>
      <lastmod>2026-11-02T18:03:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-revolution-demo/sssssbpf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-revolution-demo/sssssbpf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-revolution-demo/sssssbpf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-revolution-demo/sssssbpf"/>
      <lastmod>2026-11-02T18:03:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fixed-point-iteration-find-one-root/sssssbp8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fixed-point-iteration-find-one-root/sssssbp8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fixed-point-iteration-find-one-root/sssssbp8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fixed-point-iteration-find-one-root/sssssbp8"/>
      <lastmod>2026-11-02T16:35:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fixed-point-iteration-find-one-root/sssssbp8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fixed-point-iteration-find-one-root/sssssbp8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fixed-point-iteration-find-one-root/sssssbp8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fixed-point-iteration-find-one-root/sssssbp8"/>
      <lastmod>2026-11-02T16:35:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-directional-derivatives/sssssbpu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-directional-derivatives/sssssbpu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-directional-derivatives/sssssbpu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-directional-derivatives/sssssbpu"/>
      <lastmod>2026-11-02T16:48:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-directional-derivatives/sssssbpu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-directional-derivatives/sssssbpu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-directional-derivatives/sssssbpu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-directional-derivatives/sssssbpu"/>
      <lastmod>2026-11-02T16:48:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-of-the-natural-logarithm-function/sssssbp5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-the-natural-logarithm-function/sssssbp5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-the-natural-logarithm-function/sssssbp5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-the-natural-logarithm-function/sssssbp5"/>
      <lastmod>2026-11-02T15:11:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-of-the-natural-logarithm-function/sssssbp5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-the-natural-logarithm-function/sssssbp5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-the-natural-logarithm-function/sssssbp5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-the-natural-logarithm-function/sssssbp5"/>
      <lastmod>2026-11-02T15:11:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-anthonank/sssssbpb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-anthonank/sssssbpb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-anthonank/sssssbpb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-anthonank/sssssbpb"/>
      <lastmod>2026-11-02T12:25:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-anthonank/sssssbpb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-anthonank/sssssbpb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-anthonank/sssssbpb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-anthonank/sssssbpb"/>
      <lastmod>2026-11-02T12:25:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prime-tree/sssssbp3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prime-tree/sssssbp3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prime-tree/sssssbp3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prime-tree/sssssbp3"/>
      <lastmod>2026-11-02T02:31:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prime-tree/sssssbp3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prime-tree/sssssbp3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prime-tree/sssssbp3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prime-tree/sssssbp3"/>
      <lastmod>2026-11-02T02:31:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plane-equations-6-7/sssssbpq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-equations-6-7/sssssbpq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-equations-6-7/sssssbpq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-equations-6-7/sssssbpq"/>
      <lastmod>2026-11-02T16:47:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plane-equations-6-7/sssssbpq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-equations-6-7/sssssbpq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-equations-6-7/sssssbpq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-equations-6-7/sssssbpq"/>
      <lastmod>2026-11-02T16:47:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-ar-building-solids-with-various-cross-sections-via-prism-stacking/sssssbp1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-ar-building-solids-with-various-cross-sections-via-prism-stacking/sssssbp1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-ar-building-solids-with-various-cross-sections-via-prism-stacking/sssssbp1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-ar-building-solids-with-various-cross-sections-via-prism-stacking/sssssbp1"/>
      <lastmod>2026-11-02T00:23:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-ar-building-solids-with-various-cross-sections-via-prism-stacking/sssssbp1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-ar-building-solids-with-various-cross-sections-via-prism-stacking/sssssbp1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-ar-building-solids-with-various-cross-sections-via-prism-stacking/sssssbp1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-ar-building-solids-with-various-cross-sections-via-prism-stacking/sssssbp1"/>
      <lastmod>2026-11-02T00:23:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-incircle-and-excircle-collinearity-in-right-triangles/sssssbpm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-incircle-and-excircle-collinearity-in-right-triangles/sssssbpm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-incircle-and-excircle-collinearity-in-right-triangles/sssssbpm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-incircle-and-excircle-collinearity-in-right-triangles/sssssbpm"/>
      <lastmod>2026-11-01T21:31:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-incircle-and-excircle-collinearity-in-right-triangles/sssssbpm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-incircle-and-excircle-collinearity-in-right-triangles/sssssbpm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-incircle-and-excircle-collinearity-in-right-triangles/sssssbpm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-incircle-and-excircle-collinearity-in-right-triangles/sssssbpm"/>
      <lastmod>2026-11-01T21:31:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-graphing-systems-of-equations/sssssbpj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-graphing-systems-of-equations/sssssbpj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-graphing-systems-of-equations/sssssbpj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-graphing-systems-of-equations/sssssbpj"/>
      <lastmod>2026-11-01T21:12:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-graphing-systems-of-equations/sssssbpj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-graphing-systems-of-equations/sssssbpj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-graphing-systems-of-equations/sssssbpj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-graphing-systems-of-equations/sssssbpj"/>
      <lastmod>2026-11-01T21:12:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-simulation/sssssbpp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-simulation/sssssbpp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-simulation/sssssbpp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-simulation/sssssbpp"/>
      <lastmod>2026-11-01T21:40:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-simulation/sssssbpp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-simulation/sssssbpp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-simulation/sssssbpp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-simulation/sssssbpp"/>
      <lastmod>2026-11-01T21:40:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-pythagoras-theorem-a-dynamic-geometry-demonstration/sssssbpw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-pythagoras-theorem-a-dynamic-geometry-demonstration/sssssbpw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-pythagoras-theorem-a-dynamic-geometry-demonstration/sssssbpw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-pythagoras-theorem-a-dynamic-geometry-demonstration/sssssbpw"/>
      <lastmod>2026-11-01T19:05:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-pythagoras-theorem-a-dynamic-geometry-demonstration/sssssbpw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-pythagoras-theorem-a-dynamic-geometry-demonstration/sssssbpw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-pythagoras-theorem-a-dynamic-geometry-demonstration/sssssbpw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-pythagoras-theorem-a-dynamic-geometry-demonstration/sssssbpw"/>
      <lastmod>2026-11-01T19:05:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-with-a-side-on-a-given-line/sssssbp6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-with-a-side-on-a-given-line/sssssbp6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-with-a-side-on-a-given-line/sssssbp6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-with-a-side-on-a-given-line/sssssbp6"/>
      <lastmod>2026-11-01T21:07:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-with-a-side-on-a-given-line/sssssbp6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-with-a-side-on-a-given-line/sssssbp6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-with-a-side-on-a-given-line/sssssbp6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-with-a-side-on-a-given-line/sssssbp6"/>
      <lastmod>2026-11-01T21:07:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/no-solution-example-1/sssssbpg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/no-solution-example-1/sssssbpg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/no-solution-example-1/sssssbpg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/no-solution-example-1/sssssbpg"/>
      <lastmod>2026-11-02T17:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/no-solution-example-1/sssssbpg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/no-solution-example-1/sssssbpg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/no-solution-example-1/sssssbpg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/no-solution-example-1/sssssbpg"/>
      <lastmod>2026-11-02T17:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-plane-to-surface-with-partial-directional-derivatives/sssssbp9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-plane-to-surface-with-partial-directional-derivatives/sssssbp9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-plane-to-surface-with-partial-directional-derivatives/sssssbp9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-plane-to-surface-with-partial-directional-derivatives/sssssbp9"/>
      <lastmod>2026-11-02T18:52:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-plane-to-surface-with-partial-directional-derivatives/sssssbp9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-plane-to-surface-with-partial-directional-derivatives/sssssbp9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-plane-to-surface-with-partial-directional-derivatives/sssssbp9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-plane-to-surface-with-partial-directional-derivatives/sssssbp9"/>
      <lastmod>2026-11-02T18:52:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-andrew-knauft/sssssbpe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-andrew-knauft/sssssbpe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-inequalities-by-andrew-knauft/sssssbpe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-andrew-knauft/sssssbpe"/>
      <lastmod>2026-11-02T13:37:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-inequalities-by-andrew-knauft/sssssbpe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-andrew-knauft/sssssbpe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-inequalities-by-andrew-knauft/sssssbpe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-andrew-knauft/sssssbpe"/>
      <lastmod>2026-11-02T13:37:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/team-task-rectangle-coordinates/sssssbpv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/team-task-rectangle-coordinates/sssssbpv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/team-task-rectangle-coordinates/sssssbpv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/team-task-rectangle-coordinates/sssssbpv"/>
      <lastmod>2026-11-02T18:33:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/team-task-rectangle-coordinates/sssssbpv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/team-task-rectangle-coordinates/sssssbpv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/team-task-rectangle-coordinates/sssssbpv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/team-task-rectangle-coordinates/sssssbpv"/>
      <lastmod>2026-11-02T18:33:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/qr4-04-cyu1-graphing-parabolas-in-standard-form-using-vertex-form/sssssbp4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/qr4-04-cyu1-graphing-parabolas-in-standard-form-using-vertex-form/sssssbp4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/qr4-04-cyu1-graphing-parabolas-in-standard-form-using-vertex-form/sssssbp4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/qr4-04-cyu1-graphing-parabolas-in-standard-form-using-vertex-form/sssssbp4"/>
      <lastmod>2026-11-02T02:57:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/qr4-04-cyu1-graphing-parabolas-in-standard-form-using-vertex-form/sssssbp4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/qr4-04-cyu1-graphing-parabolas-in-standard-form-using-vertex-form/sssssbp4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/qr4-04-cyu1-graphing-parabolas-in-standard-form-using-vertex-form/sssssbp4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/qr4-04-cyu1-graphing-parabolas-in-standard-form-using-vertex-form/sssssbp4"/>
      <lastmod>2026-11-02T02:57:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploration-3-8/sssssbpl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-3-8/sssssbpl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-3-8/sssssbpl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-3-8/sssssbpl"/>
      <lastmod>2026-11-01T21:45:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploration-3-8/sssssbpl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-3-8/sssssbpl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-3-8/sssssbpl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-3-8/sssssbpl"/>
      <lastmod>2026-11-01T21:45:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-area-of-parallelograms/sssssbpy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-area-of-parallelograms/sssssbpy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-area-of-parallelograms/sssssbpy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-area-of-parallelograms/sssssbpy"/>
      <lastmod>2026-11-02T17:39:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-area-of-parallelograms/sssssbpy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-area-of-parallelograms/sssssbpy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-area-of-parallelograms/sssssbpy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-area-of-parallelograms/sssssbpy"/>
      <lastmod>2026-11-02T17:39:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-equations-by-alenikp/sssssbpa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-by-alenikp/sssssbpa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-by-alenikp/sssssbpa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-by-alenikp/sssssbpa"/>
      <lastmod>2026-11-02T12:43:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-equations-by-alenikp/sssssbpa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-by-alenikp/sssssbpa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-by-alenikp/sssssbpa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-by-alenikp/sssssbpa"/>
      <lastmod>2026-11-02T12:43:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-exploration-by-leon-brin/sssssbpc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-exploration-by-leon-brin/sssssbpc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-exploration-by-leon-brin/sssssbpc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-exploration-by-leon-brin/sssssbpc"/>
      <lastmod>2026-11-02T15:46:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-exploration-by-leon-brin/sssssbpc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-exploration-by-leon-brin/sssssbpc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-exploration-by-leon-brin/sssssbpc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-exploration-by-leon-brin/sssssbpc"/>
      <lastmod>2026-11-02T15:46:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-about-line-y-x-exploration/sssssbpr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-about-line-y-x-exploration/sssssbpr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-about-line-y-x-exploration/sssssbpr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-about-line-y-x-exploration/sssssbpr"/>
      <lastmod>2026-11-01T23:29:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-about-line-y-x-exploration/sssssbpr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-about-line-y-x-exploration/sssssbpr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-about-line-y-x-exploration/sssssbpr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-about-line-y-x-exploration/sssssbpr"/>
      <lastmod>2026-11-01T23:29:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr/sssssbph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr/sssssbph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-matrix-by-chris-cambr/sssssbph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr/sssssbph"/>
      <lastmod>2026-11-02T17:55:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connectivity-matrix-by-chris-cambr/sssssbph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr/sssssbph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-matrix-by-chris-cambr/sssssbph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr/sssssbph"/>
      <lastmod>2026-11-02T17:55:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-two-planes-by-skv/sssssbpt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-skv/sssssbpt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-by-skv/sssssbpt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-skv/sssssbpt"/>
      <lastmod>2026-11-01T19:19:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-two-planes-by-skv/sssssbpt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-skv/sssssbpt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-by-skv/sssssbpt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-skv/sssssbpt"/>
      <lastmod>2026-11-01T19:19:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-multiplication-sign-rules-demonstration-by-praveen-kumar/sssssbpx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-sign-rules-demonstration-by-praveen-kumar/sssssbpx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-sign-rules-demonstration-by-praveen-kumar/sssssbpx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-sign-rules-demonstration-by-praveen-kumar/sssssbpx"/>
      <lastmod>2026-11-01T23:51:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-multiplication-sign-rules-demonstration-by-praveen-kumar/sssssbpx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-sign-rules-demonstration-by-praveen-kumar/sssssbpx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-sign-rules-demonstration-by-praveen-kumar/sssssbpx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-sign-rules-demonstration-by-praveen-kumar/sssssbpx"/>
      <lastmod>2026-11-01T23:51:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions-parameter-plane-sssss965/sssssbpi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-parameter-plane-sssss965/sssssbpi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-parameter-plane-sssss965/sssssbpi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-parameter-plane-sssss965/sssssbpi"/>
      <lastmod>2026-11-02T15:03:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions-parameter-plane-sssss965/sssssbpi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-parameter-plane-sssss965/sssssbpi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-parameter-plane-sssss965/sssssbpi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-parameter-plane-sssss965/sssssbpi"/>
      <lastmod>2026-11-02T15:03:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic-function-by-mark-beckwith/sssssbpo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic-function-by-mark-beckwith/sssssbpo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form-of-a-quadratic-function-by-mark-beckwith/sssssbpo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic-function-by-mark-beckwith/sssssbpo"/>
      <lastmod>2026-11-02T18:17:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertex-form-of-a-quadratic-function-by-mark-beckwith/sssssbpo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic-function-by-mark-beckwith/sssssbpo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form-of-a-quadratic-function-by-mark-beckwith/sssssbpo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic-function-by-mark-beckwith/sssssbpo"/>
      <lastmod>2026-11-02T18:17:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-equations-to-solve-problems-by-geogebra-classroom-activities/sssssbws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-equations-to-solve-problems-by-geogebra-classroom-activities/sssssbws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-equations-to-solve-problems-by-geogebra-classroom-activities/sssssbws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-equations-to-solve-problems-by-geogebra-classroom-activities/sssssbws"/>
      <lastmod>2026-11-01T23:05:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-equations-to-solve-problems-by-geogebra-classroom-activities/sssssbws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-equations-to-solve-problems-by-geogebra-classroom-activities/sssssbws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-equations-to-solve-problems-by-geogebra-classroom-activities/sssssbws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-equations-to-solve-problems-by-geogebra-classroom-activities/sssssbws"/>
      <lastmod>2026-11-01T23:05:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/points-lines-and-planes-practice/sssssbw7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-practice/sssssbw7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-lines-and-planes-practice/sssssbw7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-practice/sssssbw7"/>
      <lastmod>2026-11-01T23:21:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/points-lines-and-planes-practice/sssssbw7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-practice/sssssbw7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-lines-and-planes-practice/sssssbw7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-practice/sssssbw7"/>
      <lastmod>2026-11-01T23:21:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/challenge-2a-reflection-in-the-line-y-a/sssssbwn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/challenge-2a-reflection-in-the-line-y-a/sssssbwn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/challenge-2a-reflection-in-the-line-y-a/sssssbwn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/challenge-2a-reflection-in-the-line-y-a/sssssbwn"/>
      <lastmod>2026-11-01T21:14:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/challenge-2a-reflection-in-the-line-y-a/sssssbwn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/challenge-2a-reflection-in-the-line-y-a/sssssbwn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/challenge-2a-reflection-in-the-line-y-a/sssssbwn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/challenge-2a-reflection-in-the-line-y-a/sssssbwn"/>
      <lastmod>2026-11-01T21:14:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/clive-s-candles-linear-programming-example/sssssbw2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clive-s-candles-linear-programming-example/sssssbw2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clive-s-candles-linear-programming-example/sssssbw2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clive-s-candles-linear-programming-example/sssssbw2"/>
      <lastmod>2026-11-01T20:42:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/clive-s-candles-linear-programming-example/sssssbw2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clive-s-candles-linear-programming-example/sssssbw2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clive-s-candles-linear-programming-example/sssssbw2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clive-s-candles-linear-programming-example/sssssbw2"/>
      <lastmod>2026-11-01T20:42:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scatter-plot-visualizing-data-distribution-and-relationships/sssssbwk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scatter-plot-visualizing-data-distribution-and-relationships/sssssbwk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scatter-plot-visualizing-data-distribution-and-relationships/sssssbwk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scatter-plot-visualizing-data-distribution-and-relationships/sssssbwk"/>
      <lastmod>2026-11-02T00:47:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scatter-plot-visualizing-data-distribution-and-relationships/sssssbwk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scatter-plot-visualizing-data-distribution-and-relationships/sssssbwk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scatter-plot-visualizing-data-distribution-and-relationships/sssssbwk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scatter-plot-visualizing-data-distribution-and-relationships/sssssbwk"/>
      <lastmod>2026-11-02T00:47:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sums-of-triangular-numbers/sssssbwz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sums-of-triangular-numbers/sssssbwz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sums-of-triangular-numbers/sssssbwz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sums-of-triangular-numbers/sssssbwz"/>
      <lastmod>2026-11-02T17:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sums-of-triangular-numbers/sssssbwz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sums-of-triangular-numbers/sssssbwz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sums-of-triangular-numbers/sssssbwz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sums-of-triangular-numbers/sssssbwz"/>
      <lastmod>2026-11-02T17:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-integration-z-2-over-curve/sssssbw0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-integration-z-2-over-curve/sssssbw0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-integration-z-2-over-curve/sssssbw0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-integration-z-2-over-curve/sssssbw0"/>
      <lastmod>2026-11-02T12:43:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-integration-z-2-over-curve/sssssbw0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-integration-z-2-over-curve/sssssbw0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-integration-z-2-over-curve/sssssbw0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-integration-z-2-over-curve/sssssbw0"/>
      <lastmod>2026-11-02T12:43:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-platonic-sets-and-geometric-construction/sssssbwd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-platonic-sets-and-geometric-construction/sssssbwd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-platonic-sets-and-geometric-construction/sssssbwd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-platonic-sets-and-geometric-construction/sssssbwd"/>
      <lastmod>2026-11-01T21:49:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-of-platonic-sets-and-geometric-construction/sssssbwd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-platonic-sets-and-geometric-construction/sssssbwd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-platonic-sets-and-geometric-construction/sssssbwd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-platonic-sets-and-geometric-construction/sssssbwd"/>
      <lastmod>2026-11-01T21:49:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-a-regular-pentagon/sssssbwf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-a-regular-pentagon/sssssbwf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-a-regular-pentagon/sssssbwf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-a-regular-pentagon/sssssbwf"/>
      <lastmod>2026-11-01T21:54:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-a-regular-pentagon/sssssbwf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-a-regular-pentagon/sssssbwf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-a-regular-pentagon/sssssbwf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-a-regular-pentagon/sssssbwf"/>
      <lastmod>2026-11-01T21:54:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-illusion-demo/sssssbw8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-illusion-demo/sssssbw8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-illusion-demo/sssssbw8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-illusion-demo/sssssbw8"/>
      <lastmod>2026-11-01T19:21:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-illusion-demo/sssssbw8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-illusion-demo/sssssbw8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-illusion-demo/sssssbw8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-illusion-demo/sssssbw8"/>
      <lastmod>2026-11-01T19:21:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/schueller-rhombus/sssssbwu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/schueller-rhombus/sssssbwu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/schueller-rhombus/sssssbwu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/schueller-rhombus/sssssbwu"/>
      <lastmod>2026-11-02T08:46:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/schueller-rhombus/sssssbwu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/schueller-rhombus/sssssbwu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/schueller-rhombus/sssssbwu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/schueller-rhombus/sssssbwu"/>
      <lastmod>2026-11-02T08:46:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/percentage-money-calculator/sssssbw5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-money-calculator/sssssbw5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-money-calculator/sssssbw5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-money-calculator/sssssbw5"/>
      <lastmod>2026-11-01T21:06:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/percentage-money-calculator/sssssbw5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-money-calculator/sssssbw5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-money-calculator/sssssbw5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-money-calculator/sssssbw5"/>
      <lastmod>2026-11-01T21:06:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-perpendicular-line-method-2/sssssbwb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-perpendicular-line-method-2/sssssbwb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-perpendicular-line-method-2/sssssbwb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-perpendicular-line-method-2/sssssbwb"/>
      <lastmod>2026-11-01T21:51:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-perpendicular-line-method-2/sssssbwb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-perpendicular-line-method-2/sssssbwb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-perpendicular-line-method-2/sssssbwb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-perpendicular-line-method-2/sssssbwb"/>
      <lastmod>2026-11-01T21:51:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-as-envelope-of-straight-lines/sssssbw3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-as-envelope-of-straight-lines/sssssbw3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-as-envelope-of-straight-lines/sssssbw3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-as-envelope-of-straight-lines/sssssbw3"/>
      <lastmod>2026-11-01T23:34:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-as-envelope-of-straight-lines/sssssbw3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-as-envelope-of-straight-lines/sssssbw3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-as-envelope-of-straight-lines/sssssbw3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-as-envelope-of-straight-lines/sssssbw3"/>
      <lastmod>2026-11-01T23:34:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/measuring-angles-with-protractor-by-d-vasu-raj/sssssbwq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-angles-with-protractor-by-d-vasu-raj/sssssbwq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-angles-with-protractor-by-d-vasu-raj/sssssbwq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-angles-with-protractor-by-d-vasu-raj/sssssbwq"/>
      <lastmod>2026-11-02T16:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/measuring-angles-with-protractor-by-d-vasu-raj/sssssbwq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-angles-with-protractor-by-d-vasu-raj/sssssbwq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-angles-with-protractor-by-d-vasu-raj/sssssbwq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-angles-with-protractor-by-d-vasu-raj/sssssbwq"/>
      <lastmod>2026-11-02T16:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-parallelogram-exploration/sssssbw1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-exploration/sssssbw1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-parallelogram-exploration/sssssbw1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-exploration/sssssbw1"/>
      <lastmod>2026-11-01T19:11:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-parallelogram-exploration/sssssbw1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-exploration/sssssbw1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-parallelogram-exploration/sssssbw1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-exploration/sssssbw1"/>
      <lastmod>2026-11-01T19:11:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-net-and-intersection-demonstration/sssssbwm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-net-and-intersection-demonstration/sssssbwm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-net-and-intersection-demonstration/sssssbwm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-net-and-intersection-demonstration/sssssbwm"/>
      <lastmod>2026-11-02T02:32:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-net-and-intersection-demonstration/sssssbwm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-net-and-intersection-demonstration/sssssbwm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-net-and-intersection-demonstration/sssssbwm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-net-and-intersection-demonstration/sssssbwm"/>
      <lastmod>2026-11-02T02:32:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/on-both-of-the-lines-im-8-4-11-lesson/sssssbwj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/on-both-of-the-lines-im-8-4-11-lesson/sssssbwj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/on-both-of-the-lines-im-8-4-11-lesson/sssssbwj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/on-both-of-the-lines-im-8-4-11-lesson/sssssbwj"/>
      <lastmod>2026-11-01T20:21:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/on-both-of-the-lines-im-8-4-11-lesson/sssssbwj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/on-both-of-the-lines-im-8-4-11-lesson/sssssbwj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/on-both-of-the-lines-im-8-4-11-lesson/sssssbwj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/on-both-of-the-lines-im-8-4-11-lesson/sssssbwj"/>
      <lastmod>2026-11-01T20:21:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-of-revolution-disk-vs-shell-method-comparison/sssssbwp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-disk-vs-shell-method-comparison/sssssbwp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution-disk-vs-shell-method-comparison/sssssbwp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-disk-vs-shell-method-comparison/sssssbwp"/>
      <lastmod>2026-11-01T20:42:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-of-revolution-disk-vs-shell-method-comparison/sssssbwp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-disk-vs-shell-method-comparison/sssssbwp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution-disk-vs-shell-method-comparison/sssssbwp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-disk-vs-shell-method-comparison/sssssbwp"/>
      <lastmod>2026-11-01T20:42:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-graph/sssssbww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-graph/sssssbww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-graph/sssssbww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-graph/sssssbww"/>
      <lastmod>2026-11-02T18:48:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-graph/sssssbww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-graph/sssssbww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-graph/sssssbww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-graph/sssssbww"/>
      <lastmod>2026-11-02T18:48:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translated-circle-art/sssssbw6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translated-circle-art/sssssbw6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translated-circle-art/sssssbw6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translated-circle-art/sssssbw6"/>
      <lastmod>2026-11-01T23:52:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translated-circle-art/sssssbw6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translated-circle-art/sssssbw6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translated-circle-art/sssssbw6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translated-circle-art/sssssbw6"/>
      <lastmod>2026-11-01T23:52:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-template-exploring-geometric-properties/sssssbwg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-template-exploring-geometric-properties/sssssbwg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-template-exploring-geometric-properties/sssssbwg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-template-exploring-geometric-properties/sssssbwg"/>
      <lastmod>2026-11-02T18:13:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-template-exploring-geometric-properties/sssssbwg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-template-exploring-geometric-properties/sssssbwg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-template-exploring-geometric-properties/sssssbwg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-template-exploring-geometric-properties/sssssbwg"/>
      <lastmod>2026-11-02T18:13:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-distributes-over-addition-demonstration/sssssbw9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-distributes-over-addition-demonstration/sssssbw9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-distributes-over-addition-demonstration/sssssbw9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-distributes-over-addition-demonstration/sssssbw9"/>
      <lastmod>2026-11-01T21:07:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-distributes-over-addition-demonstration/sssssbw9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-distributes-over-addition-demonstration/sssssbw9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-distributes-over-addition-demonstration/sssssbw9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-distributes-over-addition-demonstration/sssssbw9"/>
      <lastmod>2026-11-01T21:07:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/voronoi-diagram-construction-with-4-points/sssssbwe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-diagram-construction-with-4-points/sssssbwe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-diagram-construction-with-4-points/sssssbwe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-diagram-construction-with-4-points/sssssbwe"/>
      <lastmod>2026-11-02T11:44:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/voronoi-diagram-construction-with-4-points/sssssbwe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-diagram-construction-with-4-points/sssssbwe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-diagram-construction-with-4-points/sssssbwe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-diagram-construction-with-4-points/sssssbwe"/>
      <lastmod>2026-11-02T11:44:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersecting-cylinders/sssssbwv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-cylinders/sssssbwv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-cylinders/sssssbwv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-cylinders/sssssbwv"/>
      <lastmod>2026-11-01T20:41:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersecting-cylinders/sssssbwv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-cylinders/sssssbwv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-cylinders/sssssbwv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-cylinders/sssssbwv"/>
      <lastmod>2026-11-01T20:41:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-cross-sections-of-triangular-prisms/sssssbw4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-cross-sections-of-triangular-prisms/sssssbw4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-cross-sections-of-triangular-prisms/sssssbw4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-cross-sections-of-triangular-prisms/sssssbw4"/>
      <lastmod>2026-11-02T00:19:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-cross-sections-of-triangular-prisms/sssssbw4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-cross-sections-of-triangular-prisms/sssssbw4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-cross-sections-of-triangular-prisms/sssssbw4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-cross-sections-of-triangular-prisms/sssssbw4"/>
      <lastmod>2026-11-02T00:19:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-cube-and-its-diagonals/sssssbwl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-cube-and-its-diagonals/sssssbwl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-cube-and-its-diagonals/sssssbwl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-cube-and-its-diagonals/sssssbwl"/>
      <lastmod>2026-11-01T19:19:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-cube-and-its-diagonals/sssssbwl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-cube-and-its-diagonals/sssssbwl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-cube-and-its-diagonals/sssssbwl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-cube-and-its-diagonals/sssssbwl"/>
      <lastmod>2026-11-01T19:19:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-sine-wave/sssssbwy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-sine-wave/sssssbwy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-sine-wave/sssssbwy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-sine-wave/sssssbwy"/>
      <lastmod>2026-11-02T17:41:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-sine-wave/sssssbwy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-sine-wave/sssssbwy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-sine-wave/sssssbwy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-sine-wave/sssssbwy"/>
      <lastmod>2026-11-02T17:41:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/new-hexagon-exploration/sssssbwa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-hexagon-exploration/sssssbwa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-hexagon-exploration/sssssbwa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-hexagon-exploration/sssssbwa"/>
      <lastmod>2026-11-02T12:57:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/new-hexagon-exploration/sssssbwa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-hexagon-exploration/sssssbwa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-hexagon-exploration/sssssbwa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-hexagon-exploration/sssssbwa"/>
      <lastmod>2026-11-02T12:57:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alan-davis-polygons-math-art/sssssbwc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alan-davis-polygons-math-art/sssssbwc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alan-davis-polygons-math-art/sssssbwc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alan-davis-polygons-math-art/sssssbwc"/>
      <lastmod>2026-11-02T02:23:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alan-davis-polygons-math-art/sssssbwc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alan-davis-polygons-math-art/sssssbwc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alan-davis-polygons-math-art/sssssbwc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alan-davis-polygons-math-art/sssssbwc"/>
      <lastmod>2026-11-02T02:23:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-of-piecewise-defined-function-1/sssssbwr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-of-piecewise-defined-function-1/sssssbwr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-of-piecewise-defined-function-1/sssssbwr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-of-piecewise-defined-function-1/sssssbwr"/>
      <lastmod>2026-11-02T00:41:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-of-piecewise-defined-function-1/sssssbwr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-of-piecewise-defined-function-1/sssssbwr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-of-piecewise-defined-function-1/sssssbwr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-of-piecewise-defined-function-1/sssssbwr"/>
      <lastmod>2026-11-02T00:41:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-lcm-by-listing-multiples-by-alex-chik/sssssbwh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-lcm-by-listing-multiples-by-alex-chik/sssssbwh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-lcm-by-listing-multiples-by-alex-chik/sssssbwh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-lcm-by-listing-multiples-by-alex-chik/sssssbwh"/>
      <lastmod>2026-11-01T21:01:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-lcm-by-listing-multiples-by-alex-chik/sssssbwh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-lcm-by-listing-multiples-by-alex-chik/sssssbwh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-lcm-by-listing-multiples-by-alex-chik/sssssbwh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-lcm-by-listing-multiples-by-alex-chik/sssssbwh"/>
      <lastmod>2026-11-01T21:01:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiple-prism-refractions-lens-construction/sssssbwt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiple-prism-refractions-lens-construction/sssssbwt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiple-prism-refractions-lens-construction/sssssbwt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiple-prism-refractions-lens-construction/sssssbwt"/>
      <lastmod>2026-11-02T18:50:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiple-prism-refractions-lens-construction/sssssbwt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiple-prism-refractions-lens-construction/sssssbwt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiple-prism-refractions-lens-construction/sssssbwt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiple-prism-refractions-lens-construction/sssssbwt"/>
      <lastmod>2026-11-02T18:50:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cruciform-curve-as-a-parametric-curve-in-3d-space/sssssbwx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cruciform-curve-as-a-parametric-curve-in-3d-space/sssssbwx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cruciform-curve-as-a-parametric-curve-in-3d-space/sssssbwx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cruciform-curve-as-a-parametric-curve-in-3d-space/sssssbwx"/>
      <lastmod>2026-11-01T21:58:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cruciform-curve-as-a-parametric-curve-in-3d-space/sssssbwx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cruciform-curve-as-a-parametric-curve-in-3d-space/sssssbwx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cruciform-curve-as-a-parametric-curve-in-3d-space/sssssbwx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cruciform-curve-as-a-parametric-curve-in-3d-space/sssssbwx"/>
      <lastmod>2026-11-01T21:58:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/head-to-tail-vector-construction/sssssbwi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/head-to-tail-vector-construction/sssssbwi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/head-to-tail-vector-construction/sssssbwi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/head-to-tail-vector-construction/sssssbwi"/>
      <lastmod>2026-11-01T21:32:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/head-to-tail-vector-construction/sssssbwi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/head-to-tail-vector-construction/sssssbwi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/head-to-tail-vector-construction/sssssbwi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/head-to-tail-vector-construction/sssssbwi"/>
      <lastmod>2026-11-01T21:32:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-triangles-geometric-construction-and-mathematical-concepts/sssssbwo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangles-geometric-construction-and-mathematical-concepts/sssssbwo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangles-geometric-construction-and-mathematical-concepts/sssssbwo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangles-geometric-construction-and-mathematical-concepts/sssssbwo"/>
      <lastmod>2026-11-02T02:28:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-triangles-geometric-construction-and-mathematical-concepts/sssssbwo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangles-geometric-construction-and-mathematical-concepts/sssssbwo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangles-geometric-construction-and-mathematical-concepts/sssssbwo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangles-geometric-construction-and-mathematical-concepts/sssssbwo"/>
      <lastmod>2026-11-02T02:28:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equations-of-parallel-and-perpendicular-lines/sssssb6s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equations-of-parallel-and-perpendicular-lines/sssssb6s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equations-of-parallel-and-perpendicular-lines/sssssb6s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equations-of-parallel-and-perpendicular-lines/sssssb6s"/>
      <lastmod>2026-11-01T23:51:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equations-of-parallel-and-perpendicular-lines/sssssb6s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equations-of-parallel-and-perpendicular-lines/sssssb6s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equations-of-parallel-and-perpendicular-lines/sssssb6s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equations-of-parallel-and-perpendicular-lines/sssssb6s"/>
      <lastmod>2026-11-01T23:51:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-angled-triangles-practice/sssssb67</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-angled-triangles-practice/sssssb67"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-angled-triangles-practice/sssssb67"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-angled-triangles-practice/sssssb67"/>
      <lastmod>2026-11-01T22:05:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-angled-triangles-practice/sssssb67</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-angled-triangles-practice/sssssb67"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-angled-triangles-practice/sssssb67"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-angled-triangles-practice/sssssb67"/>
      <lastmod>2026-11-01T22:05:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-and-polygon-transformation/sssssb6n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-and-polygon-transformation/sssssb6n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-and-polygon-transformation/sssssb6n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-and-polygon-transformation/sssssb6n"/>
      <lastmod>2026-11-02T18:53:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-and-polygon-transformation/sssssb6n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-and-polygon-transformation/sssssb6n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-and-polygon-transformation/sssssb6n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-and-polygon-transformation/sssssb6n"/>
      <lastmod>2026-11-02T18:53:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-of-a-cube/sssssb62</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-a-cube/sssssb62"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-a-cube/sssssb62"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-a-cube/sssssb62"/>
      <lastmod>2026-11-02T17:43:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-of-a-cube/sssssb62</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-a-cube/sssssb62"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-a-cube/sssssb62"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-a-cube/sssssb62"/>
      <lastmod>2026-11-02T17:43:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-area-calculation-example/sssssb6k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-example/sssssb6k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-calculation-example/sssssb6k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-example/sssssb6k"/>
      <lastmod>2026-11-01T23:51:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-area-calculation-example/sssssb6k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-example/sssssb6k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-calculation-example/sssssb6k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-example/sssssb6k"/>
      <lastmod>2026-11-01T23:51:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-plane-to-sphere-by-norm-prokup/sssssb6z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-plane-to-sphere-by-norm-prokup/sssssb6z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-plane-to-sphere-by-norm-prokup/sssssb6z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-plane-to-sphere-by-norm-prokup/sssssb6z"/>
      <lastmod>2026-11-02T17:14:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-plane-to-sphere-by-norm-prokup/sssssb6z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-plane-to-sphere-by-norm-prokup/sssssb6z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-plane-to-sphere-by-norm-prokup/sssssb6z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-plane-to-sphere-by-norm-prokup/sssssb6z"/>
      <lastmod>2026-11-02T17:14:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-interactive-applet/sssssb60</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-interactive-applet/sssssb60"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-and-rectangular-coordinates-interactive-applet/sssssb60"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-interactive-applet/sssssb60"/>
      <lastmod>2026-11-02T18:00:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-and-rectangular-coordinates-interactive-applet/sssssb60</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-interactive-applet/sssssb60"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-and-rectangular-coordinates-interactive-applet/sssssb60"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-interactive-applet/sssssb60"/>
      <lastmod>2026-11-02T18:00:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-by-martin-graham/sssssb6d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-martin-graham/sssssb6d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-martin-graham/sssssb6d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-martin-graham/sssssb6d"/>
      <lastmod>2026-11-02T00:28:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-by-martin-graham/sssssb6d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-martin-graham/sssssb6d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-martin-graham/sssssb6d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-martin-graham/sssssb6d"/>
      <lastmod>2026-11-02T00:28:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/concentric-circle-sections-with-black-intervals/sssssb6f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concentric-circle-sections-with-black-intervals/sssssb6f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concentric-circle-sections-with-black-intervals/sssssb6f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concentric-circle-sections-with-black-intervals/sssssb6f"/>
      <lastmod>2026-11-01T21:17:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/concentric-circle-sections-with-black-intervals/sssssb6f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concentric-circle-sections-with-black-intervals/sssssb6f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concentric-circle-sections-with-black-intervals/sssssb6f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concentric-circle-sections-with-black-intervals/sssssb6f"/>
      <lastmod>2026-11-01T21:17:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/incenter-of-a-triangle-by-karen-campe/sssssb68</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incenter-of-a-triangle-by-karen-campe/sssssb68"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incenter-of-a-triangle-by-karen-campe/sssssb68"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incenter-of-a-triangle-by-karen-campe/sssssb68"/>
      <lastmod>2026-11-02T13:30:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/incenter-of-a-triangle-by-karen-campe/sssssb68</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incenter-of-a-triangle-by-karen-campe/sssssb68"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incenter-of-a-triangle-by-karen-campe/sssssb68"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incenter-of-a-triangle-by-karen-campe/sssssb68"/>
      <lastmod>2026-11-02T13:30:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-equations-graphically-symbolically-by-judah-l-schwartz/sssssb6u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-graphically-symbolically-by-judah-l-schwartz/sssssb6u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-graphically-symbolically-by-judah-l-schwartz/sssssb6u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-graphically-symbolically-by-judah-l-schwartz/sssssb6u"/>
      <lastmod>2026-11-02T02:28:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-equations-graphically-symbolically-by-judah-l-schwartz/sssssb6u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-graphically-symbolically-by-judah-l-schwartz/sssssb6u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-graphically-symbolically-by-judah-l-schwartz/sssssb6u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-graphically-symbolically-by-judah-l-schwartz/sssssb6u"/>
      <lastmod>2026-11-02T02:28:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sampling-distribution-comparison/sssssb65</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sampling-distribution-comparison/sssssb65"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sampling-distribution-comparison/sssssb65"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sampling-distribution-comparison/sssssb65"/>
      <lastmod>2026-11-02T14:51:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sampling-distribution-comparison/sssssb65</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sampling-distribution-comparison/sssssb65"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sampling-distribution-comparison/sssssb65"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sampling-distribution-comparison/sssssb65"/>
      <lastmod>2026-11-02T14:51:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-demonstration-3/sssssb6b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-demonstration-3/sssssb6b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-demonstration-3/sssssb6b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-demonstration-3/sssssb6b"/>
      <lastmod>2026-11-01T23:48:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-demonstration-3/sssssb6b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-demonstration-3/sssssb6b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-demonstration-3/sssssb6b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-demonstration-3/sssssb6b"/>
      <lastmod>2026-11-01T23:48:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangles-and-circles/sssssb63</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles-and-circles/sssssb63"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles-and-circles/sssssb63"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles-and-circles/sssssb63"/>
      <lastmod>2026-11-02T00:15:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangles-and-circles/sssssb63</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles-and-circles/sssssb63"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles-and-circles/sssssb63"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles-and-circles/sssssb63"/>
      <lastmod>2026-11-02T00:15:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-functions-modeling-v1/sssssb6q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-modeling-v1/sssssb6q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-modeling-v1/sssssb6q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-modeling-v1/sssssb6q"/>
      <lastmod>2026-11-02T11:48:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-functions-modeling-v1/sssssb6q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-modeling-v1/sssssb6q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-modeling-v1/sssssb6q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-modeling-v1/sssssb6q"/>
      <lastmod>2026-11-02T11:48:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-root-of-x/sssssb61</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-of-x/sssssb61"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-of-x/sssssb61"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-of-x/sssssb61"/>
      <lastmod>2026-11-02T00:46:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-root-of-x/sssssb61</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-of-x/sssssb61"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-of-x/sssssb61"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-of-x/sssssb61"/>
      <lastmod>2026-11-02T00:46:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-sequence-transformation/sssssb6m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-sequence-transformation/sssssb6m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-sequence-transformation/sssssb6m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-sequence-transformation/sssssb6m"/>
      <lastmod>2026-11-02T02:48:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-sequence-transformation/sssssb6m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-sequence-transformation/sssssb6m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-sequence-transformation/sssssb6m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-sequence-transformation/sssssb6m"/>
      <lastmod>2026-11-02T02:48:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fragment-bridget-riley-math-example/sssssb6j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fragment-bridget-riley-math-example/sssssb6j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fragment-bridget-riley-math-example/sssssb6j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fragment-bridget-riley-math-example/sssssb6j"/>
      <lastmod>2026-11-01T20:57:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fragment-bridget-riley-math-example/sssssb6j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fragment-bridget-riley-math-example/sssssb6j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fragment-bridget-riley-math-example/sssssb6j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fragment-bridget-riley-math-example/sssssb6j"/>
      <lastmod>2026-11-01T20:57:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplicities-of-roots-by-jacob-schares/sssssb6p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplicities-of-roots-by-jacob-schares/sssssb6p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplicities-of-roots-by-jacob-schares/sssssb6p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplicities-of-roots-by-jacob-schares/sssssb6p"/>
      <lastmod>2026-11-02T18:47:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplicities-of-roots-by-jacob-schares/sssssb6p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplicities-of-roots-by-jacob-schares/sssssb6p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplicities-of-roots-by-jacob-schares/sssssb6p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplicities-of-roots-by-jacob-schares/sssssb6p"/>
      <lastmod>2026-11-02T18:47:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-trigonometric-ratios/sssssb6w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-trigonometric-ratios/sssssb6w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-trigonometric-ratios/sssssb6w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-trigonometric-ratios/sssssb6w"/>
      <lastmod>2026-11-02T00:07:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-trigonometric-ratios/sssssb6w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-trigonometric-ratios/sssssb6w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-trigonometric-ratios/sssssb6w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-trigonometric-ratios/sssssb6w"/>
      <lastmod>2026-11-02T00:07:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/match-functions-with-their-derivatives-by-cemccourseware/sssssb66</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/match-functions-with-their-derivatives-by-cemccourseware/sssssb66"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/match-functions-with-their-derivatives-by-cemccourseware/sssssb66"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/match-functions-with-their-derivatives-by-cemccourseware/sssssb66"/>
      <lastmod>2026-11-02T02:22:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/match-functions-with-their-derivatives-by-cemccourseware/sssssb66</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/match-functions-with-their-derivatives-by-cemccourseware/sssssb66"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/match-functions-with-their-derivatives-by-cemccourseware/sssssb66"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/match-functions-with-their-derivatives-by-cemccourseware/sssssb66"/>
      <lastmod>2026-11-02T02:22:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coupled-differential-equations-demo-by-ben-sparks/sssssb6g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coupled-differential-equations-demo-by-ben-sparks/sssssb6g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coupled-differential-equations-demo-by-ben-sparks/sssssb6g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coupled-differential-equations-demo-by-ben-sparks/sssssb6g"/>
      <lastmod>2026-11-02T02:47:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coupled-differential-equations-demo-by-ben-sparks/sssssb6g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coupled-differential-equations-demo-by-ben-sparks/sssssb6g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coupled-differential-equations-demo-by-ben-sparks/sssssb6g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coupled-differential-equations-demo-by-ben-sparks/sssssb6g"/>
      <lastmod>2026-11-02T02:47:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-subtraction-adding-the-opposite-method/sssssb69</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-adding-the-opposite-method/sssssb69"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-adding-the-opposite-method/sssssb69"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-adding-the-opposite-method/sssssb69"/>
      <lastmod>2026-11-02T18:34:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-subtraction-adding-the-opposite-method/sssssb69</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-adding-the-opposite-method/sssssb69"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-adding-the-opposite-method/sssssb69"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-adding-the-opposite-method/sssssb69"/>
      <lastmod>2026-11-02T18:34:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-laws/sssssb6e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-laws/sssssb6e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-laws/sssssb6e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-laws/sssssb6e"/>
      <lastmod>2026-11-02T18:52:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-laws/sssssb6e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-laws/sssssb6e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-laws/sssssb6e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-laws/sssssb6e"/>
      <lastmod>2026-11-02T18:52:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/viviani-s-theorem-demonstration/sssssb6v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/viviani-s-theorem-demonstration/sssssb6v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/viviani-s-theorem-demonstration/sssssb6v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/viviani-s-theorem-demonstration/sssssb6v"/>
      <lastmod>2026-11-02T02:32:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/viviani-s-theorem-demonstration/sssssb6v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/viviani-s-theorem-demonstration/sssssb6v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/viviani-s-theorem-demonstration/sssssb6v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/viviani-s-theorem-demonstration/sssssb6v"/>
      <lastmod>2026-11-02T02:32:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-problem/sssssb64</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-problem/sssssb64"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-problem/sssssb64"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-problem/sssssb64"/>
      <lastmod>2026-11-02T18:06:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-problem/sssssb64</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-problem/sssssb64"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-problem/sssssb64"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-problem/sssssb64"/>
      <lastmod>2026-11-02T18:06:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-multiple-transformation/sssssb6l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-multiple-transformation/sssssb6l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-multiple-transformation/sssssb6l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-multiple-transformation/sssssb6l"/>
      <lastmod>2026-11-02T00:35:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-multiple-transformation/sssssb6l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-multiple-transformation/sssssb6l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-multiple-transformation/sssssb6l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-multiple-transformation/sssssb6l"/>
      <lastmod>2026-11-02T00:35:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-geometric-pattern-gunbad-e-kabud/sssssb6y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-gunbad-e-kabud/sssssb6y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-pattern-gunbad-e-kabud/sssssb6y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-gunbad-e-kabud/sssssb6y"/>
      <lastmod>2026-11-02T02:17:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-geometric-pattern-gunbad-e-kabud/sssssb6y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-gunbad-e-kabud/sssssb6y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-pattern-gunbad-e-kabud/sssssb6y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-gunbad-e-kabud/sssssb6y"/>
      <lastmod>2026-11-02T02:17:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pasta-machine-2-0/sssssb6a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pasta-machine-2-0/sssssb6a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pasta-machine-2-0/sssssb6a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pasta-machine-2-0/sssssb6a"/>
      <lastmod>2026-11-01T20:41:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pasta-machine-2-0/sssssb6a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pasta-machine-2-0/sssssb6a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pasta-machine-2-0/sssssb6a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pasta-machine-2-0/sssssb6a"/>
      <lastmod>2026-11-01T20:41:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factor-trinomials-practice/sssssb6c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factor-trinomials-practice/sssssb6c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factor-trinomials-practice/sssssb6c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factor-trinomials-practice/sssssb6c"/>
      <lastmod>2026-11-01T19:09:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factor-trinomials-practice/sssssb6c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factor-trinomials-practice/sssssb6c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factor-trinomials-practice/sssssb6c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factor-trinomials-practice/sssssb6c"/>
      <lastmod>2026-11-01T19:09:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fundamental-theorem-of-calculus-by-menchublancodelprado/sssssb6r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fundamental-theorem-of-calculus-by-menchublancodelprado/sssssb6r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fundamental-theorem-of-calculus-by-menchublancodelprado/sssssb6r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fundamental-theorem-of-calculus-by-menchublancodelprado/sssssb6r"/>
      <lastmod>2026-11-01T21:51:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fundamental-theorem-of-calculus-by-menchublancodelprado/sssssb6r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fundamental-theorem-of-calculus-by-menchublancodelprado/sssssb6r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fundamental-theorem-of-calculus-by-menchublancodelprado/sssssb6r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fundamental-theorem-of-calculus-by-menchublancodelprado/sssssb6r"/>
      <lastmod>2026-11-01T21:51:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-unit-vector-component-form/sssssb6h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-unit-vector-component-form/sssssb6h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-unit-vector-component-form/sssssb6h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-unit-vector-component-form/sssssb6h"/>
      <lastmod>2026-11-01T21:35:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-unit-vector-component-form/sssssb6h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-unit-vector-component-form/sssssb6h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-unit-vector-component-form/sssssb6h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-unit-vector-component-form/sssssb6h"/>
      <lastmod>2026-11-01T21:35:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-unit-vectors/sssssb6t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-unit-vectors/sssssb6t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-unit-vectors/sssssb6t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-unit-vectors/sssssb6t"/>
      <lastmod>2026-11-02T18:20:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-unit-vectors/sssssb6t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-unit-vectors/sssssb6t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-unit-vectors/sssssb6t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-unit-vectors/sssssb6t"/>
      <lastmod>2026-11-02T18:20:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertex-on-the-circle/sssssb6x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-on-the-circle/sssssb6x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-on-the-circle/sssssb6x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-on-the-circle/sssssb6x"/>
      <lastmod>2026-11-02T18:18:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertex-on-the-circle/sssssb6x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-on-the-circle/sssssb6x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-on-the-circle/sssssb6x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-on-the-circle/sssssb6x"/>
      <lastmod>2026-11-02T18:18:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotate-parallelograms/sssssb6i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotate-parallelograms/sssssb6i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotate-parallelograms/sssssb6i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotate-parallelograms/sssssb6i"/>
      <lastmod>2026-11-02T16:58:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotate-parallelograms/sssssb6i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotate-parallelograms/sssssb6i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotate-parallelograms/sssssb6i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotate-parallelograms/sssssb6i"/>
      <lastmod>2026-11-02T16:58:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-changing-the-y-intercept-affects-a-linear-relation/sssssb6o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-changing-the-y-intercept-affects-a-linear-relation/sssssb6o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-changing-the-y-intercept-affects-a-linear-relation/sssssb6o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-changing-the-y-intercept-affects-a-linear-relation/sssssb6o"/>
      <lastmod>2026-11-02T02:47:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-changing-the-y-intercept-affects-a-linear-relation/sssssb6o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-changing-the-y-intercept-affects-a-linear-relation/sssssb6o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-changing-the-y-intercept-affects-a-linear-relation/sssssb6o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-changing-the-y-intercept-affects-a-linear-relation/sssssb6o"/>
      <lastmod>2026-11-02T02:47:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/outer-common-tangent-of-two-circles/sssssbgs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/outer-common-tangent-of-two-circles/sssssbgs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/outer-common-tangent-of-two-circles/sssssbgs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/outer-common-tangent-of-two-circles/sssssbgs"/>
      <lastmod>2026-11-01T19:35:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/outer-common-tangent-of-two-circles/sssssbgs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/outer-common-tangent-of-two-circles/sssssbgs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/outer-common-tangent-of-two-circles/sssssbgs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/outer-common-tangent-of-two-circles/sssssbgs"/>
      <lastmod>2026-11-01T19:35:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-and-poisson-distributions-comparison/sssssbg7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-and-poisson-distributions-comparison/sssssbg7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-and-poisson-distributions-comparison/sssssbg7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-and-poisson-distributions-comparison/sssssbg7"/>
      <lastmod>2026-11-02T02:17:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-and-poisson-distributions-comparison/sssssbg7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-and-poisson-distributions-comparison/sssssbg7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-and-poisson-distributions-comparison/sssssbg7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-and-poisson-distributions-comparison/sssssbg7"/>
      <lastmod>2026-11-02T02:17:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-surface-of-revolution-from-two-curves/sssssbgn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-surface-of-revolution-from-two-curves/sssssbgn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-surface-of-revolution-from-two-curves/sssssbgn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-surface-of-revolution-from-two-curves/sssssbgn"/>
      <lastmod>2026-11-02T18:16:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-surface-of-revolution-from-two-curves/sssssbgn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-surface-of-revolution-from-two-curves/sssssbgn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-surface-of-revolution-from-two-curves/sssssbgn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-surface-of-revolution-from-two-curves/sssssbgn"/>
      <lastmod>2026-11-02T18:16:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/500-coin-flips-demonstration/sssssbg2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/500-coin-flips-demonstration/sssssbg2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/500-coin-flips-demonstration/sssssbg2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/500-coin-flips-demonstration/sssssbg2"/>
      <lastmod>2026-11-02T02:58:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/500-coin-flips-demonstration/sssssbg2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/500-coin-flips-demonstration/sssssbg2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/500-coin-flips-demonstration/sssssbg2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/500-coin-flips-demonstration/sssssbg2"/>
      <lastmod>2026-11-02T02:58:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/extremely-high-powers-geometric-construction-via-rotation-and-polygon-chains/sssssbgk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/extremely-high-powers-geometric-construction-via-rotation-and-polygon-chains/sssssbgk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/extremely-high-powers-geometric-construction-via-rotation-and-polygon-chains/sssssbgk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/extremely-high-powers-geometric-construction-via-rotation-and-polygon-chains/sssssbgk"/>
      <lastmod>2026-11-01T21:54:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/extremely-high-powers-geometric-construction-via-rotation-and-polygon-chains/sssssbgk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/extremely-high-powers-geometric-construction-via-rotation-and-polygon-chains/sssssbgk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/extremely-high-powers-geometric-construction-via-rotation-and-polygon-chains/sssssbgk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/extremely-high-powers-geometric-construction-via-rotation-and-polygon-chains/sssssbgk"/>
      <lastmod>2026-11-01T21:54:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-cryptography-demonstration/sssssbgz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-cryptography-demonstration/sssssbgz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-cryptography-demonstration/sssssbgz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-cryptography-demonstration/sssssbgz"/>
      <lastmod>2026-11-01T23:54:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-cryptography-demonstration/sssssbgz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-cryptography-demonstration/sssssbgz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-cryptography-demonstration/sssssbgz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-cryptography-demonstration/sssssbgz"/>
      <lastmod>2026-11-01T23:54:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-quadratic-equations-with-quadratic-formula/sssssbg0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-with-quadratic-formula/sssssbg0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-with-quadratic-formula/sssssbg0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-with-quadratic-formula/sssssbg0"/>
      <lastmod>2026-11-02T18:30:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-quadratic-equations-with-quadratic-formula/sssssbg0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-with-quadratic-formula/sssssbg0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-with-quadratic-formula/sssssbg0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-with-quadratic-formula/sssssbg0"/>
      <lastmod>2026-11-02T18:30:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-proof-demonstration/sssssbgd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-proof-demonstration/sssssbgd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-proof-demonstration/sssssbgd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-proof-demonstration/sssssbgd"/>
      <lastmod>2026-11-02T18:56:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-proof-demonstration/sssssbgd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-proof-demonstration/sssssbgd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-proof-demonstration/sssssbgd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-proof-demonstration/sssssbgd"/>
      <lastmod>2026-11-02T18:56:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-angle-bisectors-construction/sssssbgf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-angle-bisectors-construction/sssssbgf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-angle-bisectors-construction/sssssbgf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-angle-bisectors-construction/sssssbgf"/>
      <lastmod>2026-11-02T13:03:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-angle-bisectors-construction/sssssbgf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-angle-bisectors-construction/sssssbgf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-angle-bisectors-construction/sssssbgf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-angle-bisectors-construction/sssssbgf"/>
      <lastmod>2026-11-02T13:03:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-abc-dilation/sssssbg8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-abc-dilation/sssssbg8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-abc-dilation/sssssbg8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-abc-dilation/sssssbg8"/>
      <lastmod>2026-11-02T18:44:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-abc-dilation/sssssbg8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-abc-dilation/sssssbg8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-abc-dilation/sssssbg8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-abc-dilation/sssssbg8"/>
      <lastmod>2026-11-02T18:44:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagon-cross-sections-volume/sssssbgu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-cross-sections-volume/sssssbgu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-cross-sections-volume/sssssbgu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-cross-sections-volume/sssssbgu"/>
      <lastmod>2026-11-02T16:43:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagon-cross-sections-volume/sssssbgu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-cross-sections-volume/sssssbgu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-cross-sections-volume/sssssbgu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-cross-sections-volume/sssssbgu"/>
      <lastmod>2026-11-02T16:43:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cast-and-tan-graph/sssssbg5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cast-and-tan-graph/sssssbg5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cast-and-tan-graph/sssssbg5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cast-and-tan-graph/sssssbg5"/>
      <lastmod>2026-11-01T23:48:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cast-and-tan-graph/sssssbg5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cast-and-tan-graph/sssssbg5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cast-and-tan-graph/sssssbg5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cast-and-tan-graph/sssssbg5"/>
      <lastmod>2026-11-01T23:48:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-of-a-parallelogram/sssssbgb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-a-parallelogram/sssssbgb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-a-parallelogram/sssssbgb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-a-parallelogram/sssssbgb"/>
      <lastmod>2026-11-02T17:14:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-a-parallelogram/sssssbgb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-a-parallelogram/sssssbgb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-a-parallelogram/sssssbgb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-a-parallelogram/sssssbgb"/>
      <lastmod>2026-11-02T17:14:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/candy-bar-template/sssssbg3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/candy-bar-template/sssssbg3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/candy-bar-template/sssssbg3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/candy-bar-template/sssssbg3"/>
      <lastmod>2026-11-01T23:34:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/candy-bar-template/sssssbg3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/candy-bar-template/sssssbg3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/candy-bar-template/sssssbg3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/candy-bar-template/sssssbg3"/>
      <lastmod>2026-11-01T23:34:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-2/sssssbgq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-2/sssssbgq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-2/sssssbgq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-2/sssssbgq"/>
      <lastmod>2026-11-01T23:16:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-2/sssssbgq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-2/sssssbgq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-2/sssssbgq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-2/sssssbgq"/>
      <lastmod>2026-11-01T23:16:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/effect-of-length-on-estimating-right-angles/sssssbg1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effect-of-length-on-estimating-right-angles/sssssbg1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effect-of-length-on-estimating-right-angles/sssssbg1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effect-of-length-on-estimating-right-angles/sssssbg1"/>
      <lastmod>2026-11-01T23:17:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/effect-of-length-on-estimating-right-angles/sssssbg1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effect-of-length-on-estimating-right-angles/sssssbg1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effect-of-length-on-estimating-right-angles/sssssbg1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effect-of-length-on-estimating-right-angles/sssssbg1"/>
      <lastmod>2026-11-01T23:17:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-constructions-example/sssssbgm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-constructions-example/sssssbgm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-constructions-example/sssssbgm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-constructions-example/sssssbgm"/>
      <lastmod>2026-11-02T17:54:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-constructions-example/sssssbgm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-constructions-example/sssssbgm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-constructions-example/sssssbgm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-constructions-example/sssssbgm"/>
      <lastmod>2026-11-02T17:54:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-by-pappus-theorem/sssssbgj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-by-pappus-theorem/sssssbgj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-by-pappus-theorem/sssssbgj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-by-pappus-theorem/sssssbgj"/>
      <lastmod>2026-11-01T20:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-by-pappus-theorem/sssssbgj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-by-pappus-theorem/sssssbgj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-by-pappus-theorem/sssssbgj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-by-pappus-theorem/sssssbgj"/>
      <lastmod>2026-11-01T20:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interesting-properties-of-the-regular-decagon/sssssbgp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interesting-properties-of-the-regular-decagon/sssssbgp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interesting-properties-of-the-regular-decagon/sssssbgp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interesting-properties-of-the-regular-decagon/sssssbgp"/>
      <lastmod>2026-11-02T13:29:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interesting-properties-of-the-regular-decagon/sssssbgp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interesting-properties-of-the-regular-decagon/sssssbgp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interesting-properties-of-the-regular-decagon/sssssbgp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interesting-properties-of-the-regular-decagon/sssssbgp"/>
      <lastmod>2026-11-02T13:29:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-correlation/sssssbgw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-correlation/sssssbgw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-correlation/sssssbgw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-correlation/sssssbgw"/>
      <lastmod>2026-11-02T00:53:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-correlation/sssssbgw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-correlation/sssssbgw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-correlation/sssssbgw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-correlation/sssssbgw"/>
      <lastmod>2026-11-02T00:53:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersecting-planes-exercise/sssssbg6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-planes-exercise/sssssbg6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-planes-exercise/sssssbg6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-planes-exercise/sssssbg6"/>
      <lastmod>2026-11-02T09:39:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersecting-planes-exercise/sssssbg6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-planes-exercise/sssssbg6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-planes-exercise/sssssbg6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-planes-exercise/sssssbg6"/>
      <lastmod>2026-11-02T09:39:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-properties-interactive-demo-g-gco-10/sssssbgg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-interactive-demo-g-gco-10/sssssbgg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-interactive-demo-g-gco-10/sssssbgg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-interactive-demo-g-gco-10/sssssbgg"/>
      <lastmod>2026-11-01T21:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-properties-interactive-demo-g-gco-10/sssssbgg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-interactive-demo-g-gco-10/sssssbgg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-interactive-demo-g-gco-10/sssssbgg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-interactive-demo-g-gco-10/sssssbgg"/>
      <lastmod>2026-11-01T21:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sliceform-of-sin-x-y/sssssbg9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliceform-of-sin-x-y/sssssbg9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliceform-of-sin-x-y/sssssbg9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliceform-of-sin-x-y/sssssbg9"/>
      <lastmod>2026-11-01T19:00:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sliceform-of-sin-x-y/sssssbg9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliceform-of-sin-x-y/sssssbg9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliceform-of-sin-x-y/sssssbg9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliceform-of-sin-x-y/sssssbg9"/>
      <lastmod>2026-11-01T19:00:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-construction-by-alyssarkoch-2/sssssbge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-alyssarkoch-2/sssssbge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-by-alyssarkoch-2/sssssbge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-alyssarkoch-2/sssssbge"/>
      <lastmod>2026-11-02T17:54:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-construction-by-alyssarkoch-2/sssssbge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-alyssarkoch-2/sssssbge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-by-alyssarkoch-2/sssssbge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-alyssarkoch-2/sssssbge"/>
      <lastmod>2026-11-02T17:54:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-from-a-point-on-a-line/sssssbgv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-from-a-point-on-a-line/sssssbgv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-from-a-point-on-a-line/sssssbgv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-from-a-point-on-a-line/sssssbgv"/>
      <lastmod>2026-11-01T21:24:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-from-a-point-on-a-line/sssssbgv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-from-a-point-on-a-line/sssssbgv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-from-a-point-on-a-line/sssssbgv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-from-a-point-on-a-line/sssssbgv"/>
      <lastmod>2026-11-01T21:24:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-5-3-practice-changing-elevation/sssssbg4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-5-3-practice-changing-elevation/sssssbg4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-5-3-practice-changing-elevation/sssssbg4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-5-3-practice-changing-elevation/sssssbg4"/>
      <lastmod>2026-11-01T20:19:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-5-3-practice-changing-elevation/sssssbg4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-5-3-practice-changing-elevation/sssssbg4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-5-3-practice-changing-elevation/sssssbg4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-5-3-practice-changing-elevation/sssssbg4"/>
      <lastmod>2026-11-01T20:19:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-proof-of-pythagorean-theorem-by-cemccourseware/sssssbgl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-proof-of-pythagorean-theorem-by-cemccourseware/sssssbgl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-proof-of-pythagorean-theorem-by-cemccourseware/sssssbgl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-proof-of-pythagorean-theorem-by-cemccourseware/sssssbgl"/>
      <lastmod>2026-11-02T00:27:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-proof-of-pythagorean-theorem-by-cemccourseware/sssssbgl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-proof-of-pythagorean-theorem-by-cemccourseware/sssssbgl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-proof-of-pythagorean-theorem-by-cemccourseware/sssssbgl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-proof-of-pythagorean-theorem-by-cemccourseware/sssssbgl"/>
      <lastmod>2026-11-02T00:27:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-of-cube-root-functions/sssssbgy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-cube-root-functions/sssssbgy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-cube-root-functions/sssssbgy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-cube-root-functions/sssssbgy"/>
      <lastmod>2026-11-01T23:39:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-of-cube-root-functions/sssssbgy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-cube-root-functions/sssssbgy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-cube-root-functions/sssssbgy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-cube-root-functions/sssssbgy"/>
      <lastmod>2026-11-01T23:39:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-translations/sssssbga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-translations/sssssbga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-translations/sssssbga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-translations/sssssbga"/>
      <lastmod>2026-11-02T00:26:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-translations/sssssbga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-translations/sssssbga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-translations/sssssbga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-translations/sssssbga"/>
      <lastmod>2026-11-02T00:26:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reference-angle-in-the-first-quadrant/sssssbgc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reference-angle-in-the-first-quadrant/sssssbgc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reference-angle-in-the-first-quadrant/sssssbgc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reference-angle-in-the-first-quadrant/sssssbgc"/>
      <lastmod>2026-11-02T17:38:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reference-angle-in-the-first-quadrant/sssssbgc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reference-angle-in-the-first-quadrant/sssssbgc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reference-angle-in-the-first-quadrant/sssssbgc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reference-angle-in-the-first-quadrant/sssssbgc"/>
      <lastmod>2026-11-02T17:38:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-exact-values-by-kirsty-watts/sssssbgr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exact-values-by-kirsty-watts/sssssbgr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exact-values-by-kirsty-watts/sssssbgr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exact-values-by-kirsty-watts/sssssbgr"/>
      <lastmod>2026-11-02T11:03:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-exact-values-by-kirsty-watts/sssssbgr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exact-values-by-kirsty-watts/sssssbgr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exact-values-by-kirsty-watts/sssssbgr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exact-values-by-kirsty-watts/sssssbgr"/>
      <lastmod>2026-11-02T11:03:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-and-fractions/sssssbgh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-and-fractions/sssssbgh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-and-fractions/sssssbgh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-and-fractions/sssssbgh"/>
      <lastmod>2026-11-02T00:56:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-and-fractions/sssssbgh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-and-fractions/sssssbgh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-and-fractions/sssssbgh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-and-fractions/sssssbgh"/>
      <lastmod>2026-11-02T00:56:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adjustable-triangular-prism/sssssbgt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjustable-triangular-prism/sssssbgt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjustable-triangular-prism/sssssbgt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjustable-triangular-prism/sssssbgt"/>
      <lastmod>2026-11-02T02:51:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adjustable-triangular-prism/sssssbgt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjustable-triangular-prism/sssssbgt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjustable-triangular-prism/sssssbgt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjustable-triangular-prism/sssssbgt"/>
      <lastmod>2026-11-02T02:51:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-4-8-practice-percent-increase-and-decrease-with-equations/sssssbgx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-4-8-practice-percent-increase-and-decrease-with-equations/sssssbgx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-4-8-practice-percent-increase-and-decrease-with-equations/sssssbgx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-4-8-practice-percent-increase-and-decrease-with-equations/sssssbgx"/>
      <lastmod>2026-11-01T20:22:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-4-8-practice-percent-increase-and-decrease-with-equations/sssssbgx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-4-8-practice-percent-increase-and-decrease-with-equations/sssssbgx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-4-8-practice-percent-increase-and-decrease-with-equations/sssssbgx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-4-8-practice-percent-increase-and-decrease-with-equations/sssssbgx"/>
      <lastmod>2026-11-01T20:22:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-similar-parallelograms/sssssbgi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-similar-parallelograms/sssssbgi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-similar-parallelograms/sssssbgi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-similar-parallelograms/sssssbgi"/>
      <lastmod>2026-11-02T17:47:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-similar-parallelograms/sssssbgi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-similar-parallelograms/sssssbgi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-similar-parallelograms/sssssbgi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-similar-parallelograms/sssssbgi"/>
      <lastmod>2026-11-02T17:47:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bernstein-polynomials/sssssbgo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bernstein-polynomials/sssssbgo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bernstein-polynomials/sssssbgo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bernstein-polynomials/sssssbgo"/>
      <lastmod>2026-11-02T09:46:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bernstein-polynomials/sssssbgo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bernstein-polynomials/sssssbgo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bernstein-polynomials/sssssbgo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bernstein-polynomials/sssssbgo"/>
      <lastmod>2026-11-02T09:46:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/deriving-pi-with-polygon-areas/sssssb9s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-pi-with-polygon-areas/sssssb9s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-pi-with-polygon-areas/sssssb9s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-pi-with-polygon-areas/sssssb9s"/>
      <lastmod>2026-11-01T21:05:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/deriving-pi-with-polygon-areas/sssssb9s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-pi-with-polygon-areas/sssssb9s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-pi-with-polygon-areas/sssssb9s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-pi-with-polygon-areas/sssssb9s"/>
      <lastmod>2026-11-01T21:05:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-derivative-and-its-geometric-meaning/sssssb97</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-derivative-and-its-geometric-meaning/sssssb97"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-derivative-and-its-geometric-meaning/sssssb97"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-derivative-and-its-geometric-meaning/sssssb97"/>
      <lastmod>2026-11-02T17:58:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-of-derivative-and-its-geometric-meaning/sssssb97</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-derivative-and-its-geometric-meaning/sssssb97"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-derivative-and-its-geometric-meaning/sssssb97"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-derivative-and-its-geometric-meaning/sssssb97"/>
      <lastmod>2026-11-02T17:58:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-pyramid-with-open-and-close-function/sssssb9n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid-with-open-and-close-function/sssssb9n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid-with-open-and-close-function/sssssb9n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid-with-open-and-close-function/sssssb9n"/>
      <lastmod>2026-11-02T16:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-pyramid-with-open-and-close-function/sssssb9n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid-with-open-and-close-function/sssssb9n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid-with-open-and-close-function/sssssb9n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid-with-open-and-close-function/sssssb9n"/>
      <lastmod>2026-11-02T16:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integration-introduction-formula-display-and-construction/sssssb92</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-introduction-formula-display-and-construction/sssssb92"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-introduction-formula-display-and-construction/sssssb92"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-introduction-formula-display-and-construction/sssssb92"/>
      <lastmod>2026-11-01T20:44:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integration-introduction-formula-display-and-construction/sssssb92</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-introduction-formula-display-and-construction/sssssb92"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-introduction-formula-display-and-construction/sssssb92"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-introduction-formula-display-and-construction/sssssb92"/>
      <lastmod>2026-11-01T20:44:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-and-polar-coordinates-conversion/sssssb9k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-and-polar-coordinates-conversion/sssssb9k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-and-polar-coordinates-conversion/sssssb9k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-and-polar-coordinates-conversion/sssssb9k"/>
      <lastmod>2026-11-01T23:55:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-and-polar-coordinates-conversion/sssssb9k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-and-polar-coordinates-conversion/sssssb9k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-and-polar-coordinates-conversion/sssssb9k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-and-polar-coordinates-conversion/sssssb9k"/>
      <lastmod>2026-11-01T23:55:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/repsol-logo-vector-and-geometric-construction/sssssb9z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/repsol-logo-vector-and-geometric-construction/sssssb9z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/repsol-logo-vector-and-geometric-construction/sssssb9z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/repsol-logo-vector-and-geometric-construction/sssssb9z"/>
      <lastmod>2026-11-01T20:45:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/repsol-logo-vector-and-geometric-construction/sssssb9z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/repsol-logo-vector-and-geometric-construction/sssssb9z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/repsol-logo-vector-and-geometric-construction/sssssb9z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/repsol-logo-vector-and-geometric-construction/sssssb9z"/>
      <lastmod>2026-11-01T20:45:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtraction-visualized-interactive-pie-bar-and-parabola-teaching-tool/sssssb90</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-visualized-interactive-pie-bar-and-parabola-teaching-tool/sssssb90"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-visualized-interactive-pie-bar-and-parabola-teaching-tool/sssssb90"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-visualized-interactive-pie-bar-and-parabola-teaching-tool/sssssb90"/>
      <lastmod>2026-11-02T00:24:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtraction-visualized-interactive-pie-bar-and-parabola-teaching-tool/sssssb90</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-visualized-interactive-pie-bar-and-parabola-teaching-tool/sssssb90"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-visualized-interactive-pie-bar-and-parabola-teaching-tool/sssssb90"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-visualized-interactive-pie-bar-and-parabola-teaching-tool/sssssb90"/>
      <lastmod>2026-11-02T00:24:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-section-relative-position/sssssb9d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-relative-position/sssssb9d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-relative-position/sssssb9d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-relative-position/sssssb9d"/>
      <lastmod>2026-11-01T22:08:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-section-relative-position/sssssb9d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-relative-position/sssssb9d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-relative-position/sssssb9d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-relative-position/sssssb9d"/>
      <lastmod>2026-11-01T22:08:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/day-5-rhombus-construction-and-symmetry-exploration/sssssb9f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/day-5-rhombus-construction-and-symmetry-exploration/sssssb9f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/day-5-rhombus-construction-and-symmetry-exploration/sssssb9f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/day-5-rhombus-construction-and-symmetry-exploration/sssssb9f"/>
      <lastmod>2026-11-02T15:38:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/day-5-rhombus-construction-and-symmetry-exploration/sssssb9f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/day-5-rhombus-construction-and-symmetry-exploration/sssssb9f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/day-5-rhombus-construction-and-symmetry-exploration/sssssb9f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/day-5-rhombus-construction-and-symmetry-exploration/sssssb9f"/>
      <lastmod>2026-11-02T15:38:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-rotation/sssssb98</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-rotation/sssssb98"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-rotation/sssssb98"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-rotation/sssssb98"/>
      <lastmod>2026-11-02T02:31:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-rotation/sssssb98</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-rotation/sssssb98"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-rotation/sssssb98"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-rotation/sssssb98"/>
      <lastmod>2026-11-02T02:31:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/expected-value-and-standard-deviation/sssssb9u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expected-value-and-standard-deviation/sssssb9u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expected-value-and-standard-deviation/sssssb9u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expected-value-and-standard-deviation/sssssb9u"/>
      <lastmod>2026-11-02T18:44:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/expected-value-and-standard-deviation/sssssb9u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expected-value-and-standard-deviation/sssssb9u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expected-value-and-standard-deviation/sssssb9u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expected-value-and-standard-deviation/sssssb9u"/>
      <lastmod>2026-11-02T18:44:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explanation-of-complex-polynomial-roots/sssssb95</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explanation-of-complex-polynomial-roots/sssssb95"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explanation-of-complex-polynomial-roots/sssssb95"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explanation-of-complex-polynomial-roots/sssssb95"/>
      <lastmod>2026-11-02T13:49:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explanation-of-complex-polynomial-roots/sssssb95</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explanation-of-complex-polynomial-roots/sssssb95"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explanation-of-complex-polynomial-roots/sssssb95"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explanation-of-complex-polynomial-roots/sssssb95"/>
      <lastmod>2026-11-02T13:49:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-fractions-on-a-number-line-visualizing-fraction-addition/sssssb9b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions-on-a-number-line-visualizing-fraction-addition/sssssb9b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions-on-a-number-line-visualizing-fraction-addition/sssssb9b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions-on-a-number-line-visualizing-fraction-addition/sssssb9b"/>
      <lastmod>2026-11-01T19:16:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-fractions-on-a-number-line-visualizing-fraction-addition/sssssb9b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions-on-a-number-line-visualizing-fraction-addition/sssssb9b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions-on-a-number-line-visualizing-fraction-addition/sssssb9b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions-on-a-number-line-visualizing-fraction-addition/sssssb9b"/>
      <lastmod>2026-11-01T19:16:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-daisy-a-flower-for-fractions-by-daniel-mentrard/sssssb93</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-daisy-a-flower-for-fractions-by-daniel-mentrard/sssssb93"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-daisy-a-flower-for-fractions-by-daniel-mentrard/sssssb93"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-daisy-a-flower-for-fractions-by-daniel-mentrard/sssssb93"/>
      <lastmod>2026-11-01T19:11:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-daisy-a-flower-for-fractions-by-daniel-mentrard/sssssb93</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-daisy-a-flower-for-fractions-by-daniel-mentrard/sssssb93"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-daisy-a-flower-for-fractions-by-daniel-mentrard/sssssb93"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-daisy-a-flower-for-fractions-by-daniel-mentrard/sssssb93"/>
      <lastmod>2026-11-01T19:11:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruent-angles/sssssb9q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-angles/sssssb9q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-angles/sssssb9q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-angles/sssssb9q"/>
      <lastmod>2026-11-02T18:26:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruent-angles/sssssb9q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-angles/sssssb9q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-angles/sssssb9q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-angles/sssssb9q"/>
      <lastmod>2026-11-02T18:26:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtraction-of-decimals-using-grid-model/sssssb91</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-of-decimals-using-grid-model/sssssb91"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-of-decimals-using-grid-model/sssssb91"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-of-decimals-using-grid-model/sssssb91"/>
      <lastmod>2026-11-01T20:49:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtraction-of-decimals-using-grid-model/sssssb91</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-of-decimals-using-grid-model/sssssb91"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-of-decimals-using-grid-model/sssssb91"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-of-decimals-using-grid-model/sssssb91"/>
      <lastmod>2026-11-01T20:49:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-the-ratio-of-areas-of-triangles/sssssb9m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-the-ratio-of-areas-of-triangles/sssssb9m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-the-ratio-of-areas-of-triangles/sssssb9m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-the-ratio-of-areas-of-triangles/sssssb9m"/>
      <lastmod>2026-11-02T09:47:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-the-ratio-of-areas-of-triangles/sssssb9m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-the-ratio-of-areas-of-triangles/sssssb9m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-the-ratio-of-areas-of-triangles/sssssb9m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-the-ratio-of-areas-of-triangles/sssssb9m"/>
      <lastmod>2026-11-02T09:47:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sequence-series-convergent/sssssb9j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-series-convergent/sssssb9j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-series-convergent/sssssb9j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-series-convergent/sssssb9j"/>
      <lastmod>2026-11-01T19:01:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sequence-series-convergent/sssssb9j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-series-convergent/sssssb9j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-series-convergent/sssssb9j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-series-convergent/sssssb9j"/>
      <lastmod>2026-11-01T19:01:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-linear-equations-for-cubic-spline-interpolation/sssssb9p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-linear-equations-for-cubic-spline-interpolation/sssssb9p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-linear-equations-for-cubic-spline-interpolation/sssssb9p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-linear-equations-for-cubic-spline-interpolation/sssssb9p"/>
      <lastmod>2026-11-01T21:23:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-linear-equations-for-cubic-spline-interpolation/sssssb9p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-linear-equations-for-cubic-spline-interpolation/sssssb9p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-linear-equations-for-cubic-spline-interpolation/sssssb9p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-linear-equations-for-cubic-spline-interpolation/sssssb9p"/>
      <lastmod>2026-11-01T21:23:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-translations-visualizing-shifts-in-functions-and-geometry/sssssb9w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-translations-visualizing-shifts-in-functions-and-geometry/sssssb9w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-translations-visualizing-shifts-in-functions-and-geometry/sssssb9w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-translations-visualizing-shifts-in-functions-and-geometry/sssssb9w"/>
      <lastmod>2026-11-01T21:38:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-translations-visualizing-shifts-in-functions-and-geometry/sssssb9w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-translations-visualizing-shifts-in-functions-and-geometry/sssssb9w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-translations-visualizing-shifts-in-functions-and-geometry/sssssb9w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-translations-visualizing-shifts-in-functions-and-geometry/sssssb9w"/>
      <lastmod>2026-11-01T21:38:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/poisson-distribution-graph/sssssb96</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-distribution-graph/sssssb96"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-distribution-graph/sssssb96"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-distribution-graph/sssssb96"/>
      <lastmod>2026-11-02T15:30:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/poisson-distribution-graph/sssssb96</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-distribution-graph/sssssb96"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-distribution-graph/sssssb96"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-distribution-graph/sssssb96"/>
      <lastmod>2026-11-02T15:30:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-wave-with-phasor-demo/sssssb9g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-with-phasor-demo/sssssb9g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-with-phasor-demo/sssssb9g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-with-phasor-demo/sssssb9g"/>
      <lastmod>2026-11-01T21:53:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-wave-with-phasor-demo/sssssb9g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-with-phasor-demo/sssssb9g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-with-phasor-demo/sssssb9g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-with-phasor-demo/sssssb9g"/>
      <lastmod>2026-11-01T21:53:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-by-jonathan-holland/sssssb99</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-by-jonathan-holland/sssssb99"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-by-jonathan-holland/sssssb99"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-by-jonathan-holland/sssssb99"/>
      <lastmod>2026-11-02T13:01:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-by-jonathan-holland/sssssb99</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-by-jonathan-holland/sssssb99"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-by-jonathan-holland/sssssb99"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-by-jonathan-holland/sssssb99"/>
      <lastmod>2026-11-02T13:01:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-similarity-from-a-variable-parts-perspective/sssssb9e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-similarity-from-a-variable-parts-perspective/sssssb9e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-similarity-from-a-variable-parts-perspective/sssssb9e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-similarity-from-a-variable-parts-perspective/sssssb9e"/>
      <lastmod>2026-11-01T19:29:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-similarity-from-a-variable-parts-perspective/sssssb9e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-similarity-from-a-variable-parts-perspective/sssssb9e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-similarity-from-a-variable-parts-perspective/sssssb9e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-similarity-from-a-variable-parts-perspective/sssssb9e"/>
      <lastmod>2026-11-01T19:29:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-error-types-demo/sssssb9v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-error-types-demo/sssssb9v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-error-types-demo/sssssb9v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-error-types-demo/sssssb9v"/>
      <lastmod>2026-11-01T23:17:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-error-types-demo/sssssb9v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-error-types-demo/sssssb9v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-error-types-demo/sssssb9v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-error-types-demo/sssssb9v"/>
      <lastmod>2026-11-01T23:17:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-truncated-fourier-series/sssssb94</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-truncated-fourier-series/sssssb94"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-truncated-fourier-series/sssssb94"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-truncated-fourier-series/sssssb94"/>
      <lastmod>2026-11-02T02:18:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-truncated-fourier-series/sssssb94</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-truncated-fourier-series/sssssb94"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-truncated-fourier-series/sssssb94"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-truncated-fourier-series/sssssb94"/>
      <lastmod>2026-11-02T02:18:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limit-of-sin-x-x/sssssb9l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limit-of-sin-x-x/sssssb9l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limit-of-sin-x-x/sssssb9l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limit-of-sin-x-x/sssssb9l"/>
      <lastmod>2026-11-02T17:39:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limit-of-sin-x-x/sssssb9l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limit-of-sin-x-x/sssssb9l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limit-of-sin-x-x/sssssb9l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limit-of-sin-x-x/sssssb9l"/>
      <lastmod>2026-11-02T17:39:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/confidence-intervals-for-proportions/sssssb9y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-intervals-for-proportions/sssssb9y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-intervals-for-proportions/sssssb9y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-intervals-for-proportions/sssssb9y"/>
      <lastmod>2026-11-02T15:10:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/confidence-intervals-for-proportions/sssssb9y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-intervals-for-proportions/sssssb9y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-intervals-for-proportions/sssssb9y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-intervals-for-proportions/sssssb9y"/>
      <lastmod>2026-11-02T15:10:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/stereographic-projection-mapping-the-sphere-to-the-plane/sssssb9a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stereographic-projection-mapping-the-sphere-to-the-plane/sssssb9a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stereographic-projection-mapping-the-sphere-to-the-plane/sssssb9a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stereographic-projection-mapping-the-sphere-to-the-plane/sssssb9a"/>
      <lastmod>2026-11-02T11:00:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/stereographic-projection-mapping-the-sphere-to-the-plane/sssssb9a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stereographic-projection-mapping-the-sphere-to-the-plane/sssssb9a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stereographic-projection-mapping-the-sphere-to-the-plane/sssssb9a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stereographic-projection-mapping-the-sphere-to-the-plane/sssssb9a"/>
      <lastmod>2026-11-02T11:00:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-dr/sssssb9c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-dr/sssssb9c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-dr/sssssb9c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-dr/sssssb9c"/>
      <lastmod>2026-11-02T08:53:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-dr/sssssb9c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-dr/sssssb9c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-dr/sssssb9c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-dr/sssssb9c"/>
      <lastmod>2026-11-02T08:53:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visual-fraction-addition-tool/sssssb9r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-fraction-addition-tool/sssssb9r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-fraction-addition-tool/sssssb9r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-fraction-addition-tool/sssssb9r"/>
      <lastmod>2026-11-02T00:17:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visual-fraction-addition-tool/sssssb9r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-fraction-addition-tool/sssssb9r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-fraction-addition-tool/sssssb9r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-fraction-addition-tool/sssssb9r"/>
      <lastmod>2026-11-02T00:17:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lengths-of-diagonals-in-rectangles-and-rhombi/sssssb9h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lengths-of-diagonals-in-rectangles-and-rhombi/sssssb9h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lengths-of-diagonals-in-rectangles-and-rhombi/sssssb9h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lengths-of-diagonals-in-rectangles-and-rhombi/sssssb9h"/>
      <lastmod>2026-11-02T18:24:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lengths-of-diagonals-in-rectangles-and-rhombi/sssssb9h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lengths-of-diagonals-in-rectangles-and-rhombi/sssssb9h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lengths-of-diagonals-in-rectangles-and-rhombi/sssssb9h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lengths-of-diagonals-in-rectangles-and-rhombi/sssssb9h"/>
      <lastmod>2026-11-02T18:24:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximizing-cuboid-volume/sssssb9t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximizing-cuboid-volume/sssssb9t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximizing-cuboid-volume/sssssb9t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximizing-cuboid-volume/sssssb9t"/>
      <lastmod>2026-11-02T18:52:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximizing-cuboid-volume/sssssb9t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximizing-cuboid-volume/sssssb9t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximizing-cuboid-volume/sssssb9t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximizing-cuboid-volume/sssssb9t"/>
      <lastmod>2026-11-02T18:52:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/taylor-series-for-cos-x/sssssb9x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-series-for-cos-x/sssssb9x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-series-for-cos-x/sssssb9x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-series-for-cos-x/sssssb9x"/>
      <lastmod>2026-11-01T19:28:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/taylor-series-for-cos-x/sssssb9x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-series-for-cos-x/sssssb9x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-series-for-cos-x/sssssb9x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-series-for-cos-x/sssssb9x"/>
      <lastmod>2026-11-01T19:28:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-fields-and-euler-s-method-interactive-visualization-of-differential-equat/sssssb9i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-fields-and-euler-s-method-interactive-visualization-of-differential-equat/sssssb9i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-fields-and-euler-s-method-interactive-visualization-of-differential-equat/sssssb9i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-fields-and-euler-s-method-interactive-visualization-of-differential-equat/sssssb9i"/>
      <lastmod>2026-11-02T12:34:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-fields-and-euler-s-method-interactive-visualization-of-differential-equat/sssssb9i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-fields-and-euler-s-method-interactive-visualization-of-differential-equat/sssssb9i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-fields-and-euler-s-method-interactive-visualization-of-differential-equat/sssssb9i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-fields-and-euler-s-method-interactive-visualization-of-differential-equat/sssssb9i"/>
      <lastmod>2026-11-02T12:34:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modeling-a-hershey-kiss-as-a-solid-of-revolution/sssssb9o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-a-hershey-kiss-as-a-solid-of-revolution/sssssb9o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-a-hershey-kiss-as-a-solid-of-revolution/sssssb9o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-a-hershey-kiss-as-a-solid-of-revolution/sssssb9o"/>
      <lastmod>2026-11-01T23:40:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modeling-a-hershey-kiss-as-a-solid-of-revolution/sssssb9o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-a-hershey-kiss-as-a-solid-of-revolution/sssssb9o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-a-hershey-kiss-as-a-solid-of-revolution/sssssb9o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-a-hershey-kiss-as-a-solid-of-revolution/sssssb9o"/>
      <lastmod>2026-11-01T23:40:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-unit-circle-trigonometry-vector-visualization/sssssbes</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-unit-circle-trigonometry-vector-visualization/sssssbes"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-unit-circle-trigonometry-vector-visualization/sssssbes"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-unit-circle-trigonometry-vector-visualization/sssssbes"/>
      <lastmod>2026-11-02T00:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-unit-circle-trigonometry-vector-visualization/sssssbes</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-unit-circle-trigonometry-vector-visualization/sssssbes"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-unit-circle-trigonometry-vector-visualization/sssssbes"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-unit-circle-trigonometry-vector-visualization/sssssbes"/>
      <lastmod>2026-11-02T00:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/paper-folding-cubic-equations/sssssbe7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paper-folding-cubic-equations/sssssbe7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paper-folding-cubic-equations/sssssbe7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paper-folding-cubic-equations/sssssbe7"/>
      <lastmod>2026-11-02T16:40:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/paper-folding-cubic-equations/sssssbe7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paper-folding-cubic-equations/sssssbe7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paper-folding-cubic-equations/sssssbe7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paper-folding-cubic-equations/sssssbe7"/>
      <lastmod>2026-11-02T16:40:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-problem-demonstration-by-tim-brzezinski/sssssben</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-problem-demonstration-by-tim-brzezinski/sssssben"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-problem-demonstration-by-tim-brzezinski/sssssben"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-problem-demonstration-by-tim-brzezinski/sssssben"/>
      <lastmod>2026-11-02T18:44:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-problem-demonstration-by-tim-brzezinski/sssssben</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-problem-demonstration-by-tim-brzezinski/sssssben"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-problem-demonstration-by-tim-brzezinski/sssssben"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-problem-demonstration-by-tim-brzezinski/sssssben"/>
      <lastmod>2026-11-02T18:44:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/differential-equations-mapping-diagram-slope-field-solution/sssssbe2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differential-equations-mapping-diagram-slope-field-solution/sssssbe2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differential-equations-mapping-diagram-slope-field-solution/sssssbe2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differential-equations-mapping-diagram-slope-field-solution/sssssbe2"/>
      <lastmod>2026-11-02T14:55:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/differential-equations-mapping-diagram-slope-field-solution/sssssbe2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differential-equations-mapping-diagram-slope-field-solution/sssssbe2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differential-equations-mapping-diagram-slope-field-solution/sssssbe2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differential-equations-mapping-diagram-slope-field-solution/sssssbe2"/>
      <lastmod>2026-11-02T14:55:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-in-sphere-and-dodecahedron/sssssbek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-in-sphere-and-dodecahedron/sssssbek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-in-sphere-and-dodecahedron/sssssbek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-in-sphere-and-dodecahedron/sssssbek"/>
      <lastmod>2026-11-01T23:25:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-in-sphere-and-dodecahedron/sssssbek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-in-sphere-and-dodecahedron/sssssbek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-in-sphere-and-dodecahedron/sssssbek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-in-sphere-and-dodecahedron/sssssbek"/>
      <lastmod>2026-11-01T23:25:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetrical-beauty-of-powers-2b/sssssbez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetrical-beauty-of-powers-2b/sssssbez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetrical-beauty-of-powers-2b/sssssbez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetrical-beauty-of-powers-2b/sssssbez"/>
      <lastmod>2026-11-02T17:36:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetrical-beauty-of-powers-2b/sssssbez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetrical-beauty-of-powers-2b/sssssbez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetrical-beauty-of-powers-2b/sssssbez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetrical-beauty-of-powers-2b/sssssbez"/>
      <lastmod>2026-11-02T17:36:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-using-circle-method/sssssbe0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-using-circle-method/sssssbe0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-using-circle-method/sssssbe0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-using-circle-method/sssssbe0"/>
      <lastmod>2026-11-02T03:09:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-using-circle-method/sssssbe0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-using-circle-method/sssssbe0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-using-circle-method/sssssbe0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-using-circle-method/sssssbe0"/>
      <lastmod>2026-11-02T03:09:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chi-squared-test-example/sssssbed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chi-squared-test-example/sssssbed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chi-squared-test-example/sssssbed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chi-squared-test-example/sssssbed"/>
      <lastmod>2026-11-02T00:03:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chi-squared-test-example/sssssbed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chi-squared-test-example/sssssbed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chi-squared-test-example/sssssbed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chi-squared-test-example/sssssbed"/>
      <lastmod>2026-11-02T00:03:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/axial-symmetry/sssssbef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axial-symmetry/sssssbef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axial-symmetry/sssssbef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axial-symmetry/sssssbef"/>
      <lastmod>2026-11-01T19:03:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/axial-symmetry/sssssbef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axial-symmetry/sssssbef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axial-symmetry/sssssbef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axial-symmetry/sssssbef"/>
      <lastmod>2026-11-01T19:03:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demo-of-conditional-probability-linear-programming/sssssbe8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-conditional-probability-linear-programming/sssssbe8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-conditional-probability-linear-programming/sssssbe8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-conditional-probability-linear-programming/sssssbe8"/>
      <lastmod>2026-11-01T20:52:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demo-of-conditional-probability-linear-programming/sssssbe8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-conditional-probability-linear-programming/sssssbe8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-conditional-probability-linear-programming/sssssbe8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-conditional-probability-linear-programming/sssssbe8"/>
      <lastmod>2026-11-01T20:52:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/octagons-in-islamic-geometric-patterns/sssssbeu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octagons-in-islamic-geometric-patterns/sssssbeu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octagons-in-islamic-geometric-patterns/sssssbeu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octagons-in-islamic-geometric-patterns/sssssbeu"/>
      <lastmod>2026-11-01T21:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/octagons-in-islamic-geometric-patterns/sssssbeu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octagons-in-islamic-geometric-patterns/sssssbeu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octagons-in-islamic-geometric-patterns/sssssbeu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octagons-in-islamic-geometric-patterns/sssssbeu"/>
      <lastmod>2026-11-01T21:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometric-constructions/sssssbe5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-constructions/sssssbe5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-constructions/sssssbe5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-constructions/sssssbe5"/>
      <lastmod>2026-11-02T13:11:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometric-constructions/sssssbe5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-constructions/sssssbe5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-constructions/sssssbe5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-constructions/sssssbe5"/>
      <lastmod>2026-11-02T13:11:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nullcline-plot-construction/sssssbeb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nullcline-plot-construction/sssssbeb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nullcline-plot-construction/sssssbeb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nullcline-plot-construction/sssssbeb"/>
      <lastmod>2026-11-02T00:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nullcline-plot-construction/sssssbeb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nullcline-plot-construction/sssssbeb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nullcline-plot-construction/sssssbeb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nullcline-plot-construction/sssssbeb"/>
      <lastmod>2026-11-02T00:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-of-sinus-math-art/sssssbe3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-of-sinus-math-art/sssssbe3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-of-sinus-math-art/sssssbe3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-of-sinus-math-art/sssssbe3"/>
      <lastmod>2026-11-01T19:25:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-of-sinus-math-art/sssssbe3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-of-sinus-math-art/sssssbe3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-of-sinus-math-art/sssssbe3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-of-sinus-math-art/sssssbe3"/>
      <lastmod>2026-11-01T19:25:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-interactives/sssssbeq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-interactives/sssssbeq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-interactives/sssssbeq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-interactives/sssssbeq"/>
      <lastmod>2026-11-02T03:14:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-interactives/sssssbeq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-interactives/sssssbeq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-interactives/sssssbeq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-interactives/sssssbeq"/>
      <lastmod>2026-11-02T03:14:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-tracer-dynamic-tangent-and-derivative-visualization/sssssbe1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-tracer-dynamic-tangent-and-derivative-visualization/sssssbe1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-tracer-dynamic-tangent-and-derivative-visualization/sssssbe1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-tracer-dynamic-tangent-and-derivative-visualization/sssssbe1"/>
      <lastmod>2026-11-02T00:12:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-tracer-dynamic-tangent-and-derivative-visualization/sssssbe1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-tracer-dynamic-tangent-and-derivative-visualization/sssssbe1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-tracer-dynamic-tangent-and-derivative-visualization/sssssbe1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-tracer-dynamic-tangent-and-derivative-visualization/sssssbe1"/>
      <lastmod>2026-11-02T00:12:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-areas-of-squares-and-right-triangles/sssssbem</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-areas-of-squares-and-right-triangles/sssssbem"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-areas-of-squares-and-right-triangles/sssssbem"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-areas-of-squares-and-right-triangles/sssssbem"/>
      <lastmod>2026-11-01T20:48:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-areas-of-squares-and-right-triangles/sssssbem</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-areas-of-squares-and-right-triangles/sssssbem"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-areas-of-squares-and-right-triangles/sssssbem"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-areas-of-squares-and-right-triangles/sssssbem"/>
      <lastmod>2026-11-01T20:48:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-folding-construction-and-quadratic-equations/sssssbej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-folding-construction-and-quadratic-equations/sssssbej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-folding-construction-and-quadratic-equations/sssssbej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-folding-construction-and-quadratic-equations/sssssbej"/>
      <lastmod>2026-11-02T03:16:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-folding-construction-and-quadratic-equations/sssssbej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-folding-construction-and-quadratic-equations/sssssbej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-folding-construction-and-quadratic-equations/sssssbej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-folding-construction-and-quadratic-equations/sssssbej"/>
      <lastmod>2026-11-02T03:16:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-trig-generator-v1-4/sssssbep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-trig-generator-v1-4/sssssbep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-trig-generator-v1-4/sssssbep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-trig-generator-v1-4/sssssbep"/>
      <lastmod>2026-11-02T18:54:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-trig-generator-v1-4/sssssbep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-trig-generator-v1-4/sssssbep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-trig-generator-v1-4/sssssbep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-trig-generator-v1-4/sssssbep"/>
      <lastmod>2026-11-02T18:54:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-conic-sections/sssssbew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-conic-sections/sssssbew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-conic-sections/sssssbew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-conic-sections/sssssbew"/>
      <lastmod>2026-11-02T03:00:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-conic-sections/sssssbew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-conic-sections/sssssbew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-conic-sections/sssssbew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-conic-sections/sssssbew"/>
      <lastmod>2026-11-02T03:00:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-pyramids/sssssbe6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-pyramids/sssssbe6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-pyramids/sssssbe6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-pyramids/sssssbe6"/>
      <lastmod>2026-11-02T17:35:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-pyramids/sssssbe6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-pyramids/sssssbe6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-pyramids/sssssbe6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-pyramids/sssssbe6"/>
      <lastmod>2026-11-02T17:35:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-inscribed-and-central-angles-in-a-circle/sssssbeg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-inscribed-and-central-angles-in-a-circle/sssssbeg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-inscribed-and-central-angles-in-a-circle/sssssbeg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-inscribed-and-central-angles-in-a-circle/sssssbeg"/>
      <lastmod>2026-11-02T11:55:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-inscribed-and-central-angles-in-a-circle/sssssbeg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-inscribed-and-central-angles-in-a-circle/sssssbeg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-inscribed-and-central-angles-in-a-circle/sssssbeg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-inscribed-and-central-angles-in-a-circle/sssssbeg"/>
      <lastmod>2026-11-02T11:55:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/numerical-derivative-calculation/sssssbe9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numerical-derivative-calculation/sssssbe9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numerical-derivative-calculation/sssssbe9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numerical-derivative-calculation/sssssbe9"/>
      <lastmod>2026-11-02T18:05:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/numerical-derivative-calculation/sssssbe9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numerical-derivative-calculation/sssssbe9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numerical-derivative-calculation/sssssbe9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numerical-derivative-calculation/sssssbe9"/>
      <lastmod>2026-11-02T18:05:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-intersections/sssssbee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-intersections/sssssbee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-intersections/sssssbee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-intersections/sssssbee"/>
      <lastmod>2026-11-02T16:30:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-intersections/sssssbee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-intersections/sssssbee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-intersections/sssssbee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-intersections/sssssbee"/>
      <lastmod>2026-11-02T16:30:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proving-triangles-similar-with-transformations/sssssbev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-with-transformations/sssssbev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-similar-with-transformations/sssssbev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-with-transformations/sssssbev"/>
      <lastmod>2026-11-02T18:10:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proving-triangles-similar-with-transformations/sssssbev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-with-transformations/sssssbev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-similar-with-transformations/sssssbev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-with-transformations/sssssbev"/>
      <lastmod>2026-11-02T18:10:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-pyramid/sssssbe4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid/sssssbe4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid/sssssbe4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid/sssssbe4"/>
      <lastmod>2026-11-01T22:00:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-pyramid/sssssbe4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid/sssssbe4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid/sssssbe4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid/sssssbe4"/>
      <lastmod>2026-11-01T22:00:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kaylie-number-stack-polygon-midpoint-stacking-construction/sssssbel</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kaylie-number-stack-polygon-midpoint-stacking-construction/sssssbel"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kaylie-number-stack-polygon-midpoint-stacking-construction/sssssbel"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kaylie-number-stack-polygon-midpoint-stacking-construction/sssssbel"/>
      <lastmod>2026-11-01T21:16:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kaylie-number-stack-polygon-midpoint-stacking-construction/sssssbel</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kaylie-number-stack-polygon-midpoint-stacking-construction/sssssbel"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kaylie-number-stack-polygon-midpoint-stacking-construction/sssssbel"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kaylie-number-stack-polygon-midpoint-stacking-construction/sssssbel"/>
      <lastmod>2026-11-01T21:16:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/paper-folding-angle-trisection/sssssbey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paper-folding-angle-trisection/sssssbey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paper-folding-angle-trisection/sssssbey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paper-folding-angle-trisection/sssssbey"/>
      <lastmod>2026-11-02T03:14:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/paper-folding-angle-trisection/sssssbey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paper-folding-angle-trisection/sssssbey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paper-folding-angle-trisection/sssssbey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paper-folding-angle-trisection/sssssbey"/>
      <lastmod>2026-11-02T03:14:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-strange-triangular-puzzle-can-you-explain-that/sssssbea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-strange-triangular-puzzle-can-you-explain-that/sssssbea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-strange-triangular-puzzle-can-you-explain-that/sssssbea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-strange-triangular-puzzle-can-you-explain-that/sssssbea"/>
      <lastmod>2026-11-01T23:09:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-strange-triangular-puzzle-can-you-explain-that/sssssbea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-strange-triangular-puzzle-can-you-explain-that/sssssbea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-strange-triangular-puzzle-can-you-explain-that/sssssbea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-strange-triangular-puzzle-can-you-explain-that/sssssbea"/>
      <lastmod>2026-11-01T23:09:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-division-quotitive-model-a-b/sssssbec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-quotitive-model-a-b/sssssbec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-quotitive-model-a-b/sssssbec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-quotitive-model-a-b/sssssbec"/>
      <lastmod>2026-11-02T00:06:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-division-quotitive-model-a-b/sssssbec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-quotitive-model-a-b/sssssbec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-quotitive-model-a-b/sssssbec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-quotitive-model-a-b/sssssbec"/>
      <lastmod>2026-11-02T00:06:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/moments-under-rotation-mohr-s-circle/sssssber</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moments-under-rotation-mohr-s-circle/sssssber"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moments-under-rotation-mohr-s-circle/sssssber"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moments-under-rotation-mohr-s-circle/sssssber"/>
      <lastmod>2026-11-01T21:05:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/moments-under-rotation-mohr-s-circle/sssssber</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moments-under-rotation-mohr-s-circle/sssssber"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moments-under-rotation-mohr-s-circle/sssssber"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moments-under-rotation-mohr-s-circle/sssssber"/>
      <lastmod>2026-11-01T21:05:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/more-practice-with-modeling-exponential-functions/sssssbeh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/more-practice-with-modeling-exponential-functions/sssssbeh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/more-practice-with-modeling-exponential-functions/sssssbeh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/more-practice-with-modeling-exponential-functions/sssssbeh"/>
      <lastmod>2026-11-01T22:06:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/more-practice-with-modeling-exponential-functions/sssssbeh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/more-practice-with-modeling-exponential-functions/sssssbeh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/more-practice-with-modeling-exponential-functions/sssssbeh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/more-practice-with-modeling-exponential-functions/sssssbeh"/>
      <lastmod>2026-11-01T22:06:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/variable-animation-of-equilateral-triangles-squares-and-regular-hexagons-tesse/sssssbet</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-animation-of-equilateral-triangles-squares-and-regular-hexagons-tesse/sssssbet"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-animation-of-equilateral-triangles-squares-and-regular-hexagons-tesse/sssssbet"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-animation-of-equilateral-triangles-squares-and-regular-hexagons-tesse/sssssbet"/>
      <lastmod>2026-11-02T16:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/variable-animation-of-equilateral-triangles-squares-and-regular-hexagons-tesse/sssssbet</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-animation-of-equilateral-triangles-squares-and-regular-hexagons-tesse/sssssbet"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-animation-of-equilateral-triangles-squares-and-regular-hexagons-tesse/sssssbet"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-animation-of-equilateral-triangles-squares-and-regular-hexagons-tesse/sssssbet"/>
      <lastmod>2026-11-02T16:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-volume-surface-area-practice/sssssbex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-surface-area-practice/sssssbex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-surface-area-practice/sssssbex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-surface-area-practice/sssssbex"/>
      <lastmod>2026-11-02T16:56:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-volume-surface-area-practice/sssssbex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-surface-area-practice/sssssbex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-surface-area-practice/sssssbex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-surface-area-practice/sssssbex"/>
      <lastmod>2026-11-02T16:56:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplicative-commutativity-demo/sssssbei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplicative-commutativity-demo/sssssbei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplicative-commutativity-demo/sssssbei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplicative-commutativity-demo/sssssbei"/>
      <lastmod>2026-11-02T18:03:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplicative-commutativity-demo/sssssbei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplicative-commutativity-demo/sssssbei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplicative-commutativity-demo/sssssbei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplicative-commutativity-demo/sssssbei"/>
      <lastmod>2026-11-02T18:03:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-demonstrating-geometric-transformations-and-probability-distributions/sssssbeo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-geometric-transformations-and-probability-distributions/sssssbeo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-geometric-transformations-and-probability-distributions/sssssbeo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-geometric-transformations-and-probability-distributions/sssssbeo"/>
      <lastmod>2026-11-02T18:16:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-demonstrating-geometric-transformations-and-probability-distributions/sssssbeo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-geometric-transformations-and-probability-distributions/sssssbeo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-geometric-transformations-and-probability-distributions/sssssbeo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-geometric-transformations-and-probability-distributions/sssssbeo"/>
      <lastmod>2026-11-02T18:16:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-mean-flash-in-a-parabola/sssssbvs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-flash-in-a-parabola/sssssbvs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-flash-in-a-parabola/sssssbvs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-flash-in-a-parabola/sssssbvs"/>
      <lastmod>2026-11-02T00:13:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-mean-flash-in-a-parabola/sssssbvs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-flash-in-a-parabola/sssssbvs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-flash-in-a-parabola/sssssbvs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-flash-in-a-parabola/sssssbvs"/>
      <lastmod>2026-11-02T00:13:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copy-of-implicit-differentiation-intro/sssssbv7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-of-implicit-differentiation-intro/sssssbv7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-of-implicit-differentiation-intro/sssssbv7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-of-implicit-differentiation-intro/sssssbv7"/>
      <lastmod>2026-11-01T21:40:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copy-of-implicit-differentiation-intro/sssssbv7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-of-implicit-differentiation-intro/sssssbv7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-of-implicit-differentiation-intro/sssssbv7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-of-implicit-differentiation-intro/sssssbv7"/>
      <lastmod>2026-11-01T21:40:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/growing-hair-task/sssssbvn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/growing-hair-task/sssssbvn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/growing-hair-task/sssssbvn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/growing-hair-task/sssssbvn"/>
      <lastmod>2026-11-02T18:11:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/growing-hair-task/sssssbvn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/growing-hair-task/sssssbvn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/growing-hair-task/sssssbvn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/growing-hair-task/sssssbvn"/>
      <lastmod>2026-11-02T18:11:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-inequality-theorem-exploration-by-jessica-ringler/sssssbv2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequality-theorem-exploration-by-jessica-ringler/sssssbv2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequality-theorem-exploration-by-jessica-ringler/sssssbv2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequality-theorem-exploration-by-jessica-ringler/sssssbv2"/>
      <lastmod>2026-11-01T23:41:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-inequality-theorem-exploration-by-jessica-ringler/sssssbv2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequality-theorem-exploration-by-jessica-ringler/sssssbv2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequality-theorem-exploration-by-jessica-ringler/sssssbv2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequality-theorem-exploration-by-jessica-ringler/sssssbv2"/>
      <lastmod>2026-11-01T23:41:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-exponential-function-by-christian-haich/sssssbvk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-exponential-function-by-christian-haich/sssssbvk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-exponential-function-by-christian-haich/sssssbvk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-exponential-function-by-christian-haich/sssssbvk"/>
      <lastmod>2026-11-02T11:44:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-exponential-function-by-christian-haich/sssssbvk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-exponential-function-by-christian-haich/sssssbvk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-exponential-function-by-christian-haich/sssssbvk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-exponential-function-by-christian-haich/sssssbvk"/>
      <lastmod>2026-11-02T11:44:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modulus-inequalities/sssssbvz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modulus-inequalities/sssssbvz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modulus-inequalities/sssssbvz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modulus-inequalities/sssssbvz"/>
      <lastmod>2026-11-02T12:26:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modulus-inequalities/sssssbvz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modulus-inequalities/sssssbvz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modulus-inequalities/sssssbvz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modulus-inequalities/sssssbvz"/>
      <lastmod>2026-11-02T12:26:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integral-constant-multiplication-demo/sssssbv0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integral-constant-multiplication-demo/sssssbv0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integral-constant-multiplication-demo/sssssbv0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integral-constant-multiplication-demo/sssssbv0"/>
      <lastmod>2026-11-02T17:37:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integral-constant-multiplication-demo/sssssbv0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integral-constant-multiplication-demo/sssssbv0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integral-constant-multiplication-demo/sssssbv0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integral-constant-multiplication-demo/sssssbv0"/>
      <lastmod>2026-11-02T17:37:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractal-geometry-trigonometry-interactive-demo/sssssbvd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-geometry-trigonometry-interactive-demo/sssssbvd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-geometry-trigonometry-interactive-demo/sssssbvd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-geometry-trigonometry-interactive-demo/sssssbvd"/>
      <lastmod>2026-11-02T02:56:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractal-geometry-trigonometry-interactive-demo/sssssbvd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-geometry-trigonometry-interactive-demo/sssssbvd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-geometry-trigonometry-interactive-demo/sssssbvd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-geometry-trigonometry-interactive-demo/sssssbvd"/>
      <lastmod>2026-11-02T02:56:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-surface-restriction-geometric-construction-example/sssssbvf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-surface-restriction-geometric-construction-example/sssssbvf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-surface-restriction-geometric-construction-example/sssssbvf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-surface-restriction-geometric-construction-example/sssssbvf"/>
      <lastmod>2026-11-02T00:09:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-surface-restriction-geometric-construction-example/sssssbvf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-surface-restriction-geometric-construction-example/sssssbvf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-surface-restriction-geometric-construction-example/sssssbvf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-surface-restriction-geometric-construction-example/sssssbvf"/>
      <lastmod>2026-11-02T00:09:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p3-making-triangles-1-grid/sssssbv8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p3-making-triangles-1-grid/sssssbv8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p3-making-triangles-1-grid/sssssbv8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p3-making-triangles-1-grid/sssssbv8"/>
      <lastmod>2026-11-01T21:08:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p3-making-triangles-1-grid/sssssbv8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p3-making-triangles-1-grid/sssssbv8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p3-making-triangles-1-grid/sssssbv8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p3-making-triangles-1-grid/sssssbv8"/>
      <lastmod>2026-11-01T21:08:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-speeds-and-prices-im-6-3-5-lesson/sssssbvu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-speeds-and-prices-im-6-3-5-lesson/sssssbvu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-speeds-and-prices-im-6-3-5-lesson/sssssbvu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-speeds-and-prices-im-6-3-5-lesson/sssssbvu"/>
      <lastmod>2026-11-01T20:36:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-speeds-and-prices-im-6-3-5-lesson/sssssbvu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-speeds-and-prices-im-6-3-5-lesson/sssssbvu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-speeds-and-prices-im-6-3-5-lesson/sssssbvu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-speeds-and-prices-im-6-3-5-lesson/sssssbvu"/>
      <lastmod>2026-11-01T20:36:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nazar-mosaic/sssssbv5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nazar-mosaic/sssssbv5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nazar-mosaic/sssssbv5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nazar-mosaic/sssssbv5"/>
      <lastmod>2026-11-01T23:33:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nazar-mosaic/sssssbv5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nazar-mosaic/sssssbv5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nazar-mosaic/sssssbv5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nazar-mosaic/sssssbv5"/>
      <lastmod>2026-11-01T23:33:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-to-prove-triangles-congruent/sssssbvb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-to-prove-triangles-congruent/sssssbvb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-to-prove-triangles-congruent/sssssbvb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-to-prove-triangles-congruent/sssssbvb"/>
      <lastmod>2026-11-02T02:48:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-to-prove-triangles-congruent/sssssbvb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-to-prove-triangles-congruent/sssssbvb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-to-prove-triangles-congruent/sssssbvb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-to-prove-triangles-congruent/sssssbvb"/>
      <lastmod>2026-11-02T02:48:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-spiral-cluster-model/sssssbv3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-spiral-cluster-model/sssssbv3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-spiral-cluster-model/sssssbv3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-spiral-cluster-model/sssssbv3"/>
      <lastmod>2026-11-02T00:52:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-spiral-cluster-model/sssssbv3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-spiral-cluster-model/sssssbv3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-spiral-cluster-model/sssssbv3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-spiral-cluster-model/sssssbv3"/>
      <lastmod>2026-11-02T00:52:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-from-the-definition/sssssbvq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-from-the-definition/sssssbvq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-from-the-definition/sssssbvq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-from-the-definition/sssssbvq"/>
      <lastmod>2026-11-01T22:04:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-from-the-definition/sssssbvq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-from-the-definition/sssssbvq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-from-the-definition/sssssbvq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-from-the-definition/sssssbvq"/>
      <lastmod>2026-11-01T22:04:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-interior-angles-of-regular-polygons/sssssbv1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-interior-angles-of-regular-polygons/sssssbv1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-interior-angles-of-regular-polygons/sssssbv1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-interior-angles-of-regular-polygons/sssssbv1"/>
      <lastmod>2026-11-02T18:00:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-interior-angles-of-regular-polygons/sssssbv1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-interior-angles-of-regular-polygons/sssssbv1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-interior-angles-of-regular-polygons/sssssbv1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-interior-angles-of-regular-polygons/sssssbv1"/>
      <lastmod>2026-11-02T18:00:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinate-inversion/sssssbvm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-inversion/sssssbvm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-inversion/sssssbvm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-inversion/sssssbvm"/>
      <lastmod>2026-11-02T08:42:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinate-inversion/sssssbvm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-inversion/sssssbvm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-inversion/sssssbvm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-inversion/sssssbvm"/>
      <lastmod>2026-11-02T08:42:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-field-of-a-differential-equation/sssssbvj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-field-of-a-differential-equation/sssssbvj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-field-of-a-differential-equation/sssssbvj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-field-of-a-differential-equation/sssssbvj"/>
      <lastmod>2026-11-01T20:59:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-field-of-a-differential-equation/sssssbvj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-field-of-a-differential-equation/sssssbvj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-field-of-a-differential-equation/sssssbvj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-field-of-a-differential-equation/sssssbvj"/>
      <lastmod>2026-11-01T20:59:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-and-symbolic-solution-of-linear-equations-game/sssssbvp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-and-symbolic-solution-of-linear-equations-game/sssssbvp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-and-symbolic-solution-of-linear-equations-game/sssssbvp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-and-symbolic-solution-of-linear-equations-game/sssssbvp"/>
      <lastmod>2026-11-02T02:53:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-and-symbolic-solution-of-linear-equations-game/sssssbvp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-and-symbolic-solution-of-linear-equations-game/sssssbvp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-and-symbolic-solution-of-linear-equations-game/sssssbvp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-and-symbolic-solution-of-linear-equations-game/sssssbvp"/>
      <lastmod>2026-11-02T02:53:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-properties-investigation-by-marcia-cyr/sssssbvw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-properties-investigation-by-marcia-cyr/sssssbvw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-properties-investigation-by-marcia-cyr/sssssbvw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-properties-investigation-by-marcia-cyr/sssssbvw"/>
      <lastmod>2026-11-01T21:11:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-properties-investigation-by-marcia-cyr/sssssbvw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-properties-investigation-by-marcia-cyr/sssssbvw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-properties-investigation-by-marcia-cyr/sssssbvw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-properties-investigation-by-marcia-cyr/sssssbvw"/>
      <lastmod>2026-11-01T21:11:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-ellipse-and-circle/sssssbv6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-ellipse-and-circle/sssssbv6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-ellipse-and-circle/sssssbv6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-ellipse-and-circle/sssssbv6"/>
      <lastmod>2026-11-02T18:34:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-ellipse-and-circle/sssssbv6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-ellipse-and-circle/sssssbv6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-ellipse-and-circle/sssssbv6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-ellipse-and-circle/sssssbv6"/>
      <lastmod>2026-11-02T18:34:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/illustrating-irrational-numbers-on-a-number-line/sssssbvg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/illustrating-irrational-numbers-on-a-number-line/sssssbvg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/illustrating-irrational-numbers-on-a-number-line/sssssbvg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/illustrating-irrational-numbers-on-a-number-line/sssssbvg"/>
      <lastmod>2026-11-01T23:32:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/illustrating-irrational-numbers-on-a-number-line/sssssbvg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/illustrating-irrational-numbers-on-a-number-line/sssssbvg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/illustrating-irrational-numbers-on-a-number-line/sssssbvg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/illustrating-irrational-numbers-on-a-number-line/sssssbvg"/>
      <lastmod>2026-11-01T23:32:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-modeling-of-famous-domes-around-the-world/sssssbv9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-modeling-of-famous-domes-around-the-world/sssssbv9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-modeling-of-famous-domes-around-the-world/sssssbv9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-modeling-of-famous-domes-around-the-world/sssssbv9"/>
      <lastmod>2026-11-02T03:00:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-modeling-of-famous-domes-around-the-world/sssssbv9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-modeling-of-famous-domes-around-the-world/sssssbv9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-modeling-of-famous-domes-around-the-world/sssssbv9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-modeling-of-famous-domes-around-the-world/sssssbv9"/>
      <lastmod>2026-11-02T03:00:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangle-demonstration/sssssbve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-demonstration/sssssbve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-demonstration/sssssbve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-demonstration/sssssbve"/>
      <lastmod>2026-11-02T10:58:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangle-demonstration/sssssbve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-demonstration/sssssbve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-demonstration/sssssbve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-demonstration/sssssbve"/>
      <lastmod>2026-11-02T10:58:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-toyota-logo/sssssbvv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-toyota-logo/sssssbvv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-toyota-logo/sssssbvv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-toyota-logo/sssssbvv"/>
      <lastmod>2026-11-02T15:27:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-toyota-logo/sssssbvv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-toyota-logo/sssssbvv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-toyota-logo/sssssbvv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-toyota-logo/sssssbvv"/>
      <lastmod>2026-11-02T15:27:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-triangle-quick-discovery/sssssbv4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangle-quick-discovery/sssssbv4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangle-quick-discovery/sssssbv4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangle-quick-discovery/sssssbv4"/>
      <lastmod>2026-11-02T17:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-triangle-quick-discovery/sssssbv4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangle-quick-discovery/sssssbv4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangle-quick-discovery/sssssbv4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangle-quick-discovery/sssssbv4"/>
      <lastmod>2026-11-02T17:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-by-hannu-m-ki/sssssbvl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-by-hannu-m-ki/sssssbvl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-by-hannu-m-ki/sssssbvl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-by-hannu-m-ki/sssssbvl"/>
      <lastmod>2026-11-01T21:30:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-by-hannu-m-ki/sssssbvl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-by-hannu-m-ki/sssssbvl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-by-hannu-m-ki/sssssbvl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-by-hannu-m-ki/sssssbvl"/>
      <lastmod>2026-11-01T21:30:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-similarity/sssssbvy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-similarity/sssssbvy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-similarity/sssssbvy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-similarity/sssssbvy"/>
      <lastmod>2026-11-02T12:25:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-similarity/sssssbvy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-similarity/sssssbvy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-similarity/sssssbvy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-similarity/sssssbvy"/>
      <lastmod>2026-11-02T12:25:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-areas-of-regular-polygons-with-fixed-perimeter/sssssbva</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-areas-of-regular-polygons-with-fixed-perimeter/sssssbva"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-areas-of-regular-polygons-with-fixed-perimeter/sssssbva"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-areas-of-regular-polygons-with-fixed-perimeter/sssssbva"/>
      <lastmod>2026-11-02T18:34:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-areas-of-regular-polygons-with-fixed-perimeter/sssssbva</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-areas-of-regular-polygons-with-fixed-perimeter/sssssbva"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-areas-of-regular-polygons-with-fixed-perimeter/sssssbva"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-areas-of-regular-polygons-with-fixed-perimeter/sssssbva"/>
      <lastmod>2026-11-02T18:34:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-side-of-an-equilateral-triangle/sssssbvc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-side-of-an-equilateral-triangle/sssssbvc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-side-of-an-equilateral-triangle/sssssbvc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-side-of-an-equilateral-triangle/sssssbvc"/>
      <lastmod>2026-11-01T23:32:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-side-of-an-equilateral-triangle/sssssbvc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-side-of-an-equilateral-triangle/sssssbvc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-side-of-an-equilateral-triangle/sssssbvc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-side-of-an-equilateral-triangle/sssssbvc"/>
      <lastmod>2026-11-01T23:32:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-square-numbers-by-cheung-pak-hin/sssssbvr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-square-numbers-by-cheung-pak-hin/sssssbvr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-square-numbers-by-cheung-pak-hin/sssssbvr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-square-numbers-by-cheung-pak-hin/sssssbvr"/>
      <lastmod>2026-11-01T23:14:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-square-numbers-by-cheung-pak-hin/sssssbvr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-square-numbers-by-cheung-pak-hin/sssssbvr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-square-numbers-by-cheung-pak-hin/sssssbvr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-square-numbers-by-cheung-pak-hin/sssssbvr"/>
      <lastmod>2026-11-01T23:14:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-exploration-of-complex-number-subtraction/sssssbvh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-exploration-of-complex-number-subtraction/sssssbvh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-exploration-of-complex-number-subtraction/sssssbvh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-exploration-of-complex-number-subtraction/sssssbvh"/>
      <lastmod>2026-11-02T12:49:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-exploration-of-complex-number-subtraction/sssssbvh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-exploration-of-complex-number-subtraction/sssssbvh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-exploration-of-complex-number-subtraction/sssssbvh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-exploration-of-complex-number-subtraction/sssssbvh"/>
      <lastmod>2026-11-02T12:49:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/clustered-circles-with-single-intersection-points/sssssbvt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clustered-circles-with-single-intersection-points/sssssbvt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clustered-circles-with-single-intersection-points/sssssbvt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clustered-circles-with-single-intersection-points/sssssbvt"/>
      <lastmod>2026-11-01T21:14:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/clustered-circles-with-single-intersection-points/sssssbvt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clustered-circles-with-single-intersection-points/sssssbvt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clustered-circles-with-single-intersection-points/sssssbvt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clustered-circles-with-single-intersection-points/sssssbvt"/>
      <lastmod>2026-11-01T21:14:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-and-geometry-division/sssssbvx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-division/sssssbvx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-geometry-division/sssssbvx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-division/sssssbvx"/>
      <lastmod>2026-11-02T15:02:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-and-geometry-division/sssssbvx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-division/sssssbvx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-geometry-division/sssssbvx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-division/sssssbvx"/>
      <lastmod>2026-11-02T15:02:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-and-exponential-functions-comparison/sssssbvi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-and-exponential-functions-comparison/sssssbvi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-and-exponential-functions-comparison/sssssbvi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-and-exponential-functions-comparison/sssssbvi"/>
      <lastmod>2026-11-02T08:39:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-and-exponential-functions-comparison/sssssbvi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-and-exponential-functions-comparison/sssssbvi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-and-exponential-functions-comparison/sssssbvi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-and-exponential-functions-comparison/sssssbvi"/>
      <lastmod>2026-11-02T08:39:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-exploration-by-travis-kleinschmidt/sssssbvo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-exploration-by-travis-kleinschmidt/sssssbvo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-exploration-by-travis-kleinschmidt/sssssbvo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-exploration-by-travis-kleinschmidt/sssssbvo"/>
      <lastmod>2026-11-02T17:13:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-exploration-by-travis-kleinschmidt/sssssbvo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-exploration-by-travis-kleinschmidt/sssssbvo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-exploration-by-travis-kleinschmidt/sssssbvo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-exploration-by-travis-kleinschmidt/sssssbvo"/>
      <lastmod>2026-11-02T17:13:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/differentiability-and-continuity/sssssb4s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differentiability-and-continuity/sssssb4s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differentiability-and-continuity/sssssb4s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differentiability-and-continuity/sssssb4s"/>
      <lastmod>2026-11-01T23:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/differentiability-and-continuity/sssssb4s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differentiability-and-continuity/sssssb4s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differentiability-and-continuity/sssssb4s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differentiability-and-continuity/sssssb4s"/>
      <lastmod>2026-11-01T23:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/straight-edge-and-compass-square-construction/sssssb47</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/straight-edge-and-compass-square-construction/sssssb47"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/straight-edge-and-compass-square-construction/sssssb47"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/straight-edge-and-compass-square-construction/sssssb47"/>
      <lastmod>2026-11-02T00:12:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/straight-edge-and-compass-square-construction/sssssb47</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/straight-edge-and-compass-square-construction/sssssb47"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/straight-edge-and-compass-square-construction/sssssb47"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/straight-edge-and-compass-square-construction/sssssb47"/>
      <lastmod>2026-11-02T00:12:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-diagonals-animation/sssssb4n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-diagonals-animation/sssssb4n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-diagonals-animation/sssssb4n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-diagonals-animation/sssssb4n"/>
      <lastmod>2026-11-02T12:09:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-diagonals-animation/sssssb4n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-diagonals-animation/sssssb4n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-diagonals-animation/sssssb4n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-diagonals-animation/sssssb4n"/>
      <lastmod>2026-11-02T12:09:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chi-squared-test-illustrated-with-ellipses-case-control-counts-over-time/sssssb42</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chi-squared-test-illustrated-with-ellipses-case-control-counts-over-time/sssssb42"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chi-squared-test-illustrated-with-ellipses-case-control-counts-over-time/sssssb42"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chi-squared-test-illustrated-with-ellipses-case-control-counts-over-time/sssssb42"/>
      <lastmod>2026-11-01T19:06:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chi-squared-test-illustrated-with-ellipses-case-control-counts-over-time/sssssb42</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chi-squared-test-illustrated-with-ellipses-case-control-counts-over-time/sssssb42"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chi-squared-test-illustrated-with-ellipses-case-control-counts-over-time/sssssb42"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chi-squared-test-illustrated-with-ellipses-case-control-counts-over-time/sssssb42"/>
      <lastmod>2026-11-01T19:06:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-kathryn-peake/sssssb4k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-kathryn-peake/sssssb4k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-calculation-by-kathryn-peake/sssssb4k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-kathryn-peake/sssssb4k"/>
      <lastmod>2026-11-02T17:01:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-area-calculation-by-kathryn-peake/sssssb4k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-kathryn-peake/sssssb4k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-calculation-by-kathryn-peake/sssssb4k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-kathryn-peake/sssssb4k"/>
      <lastmod>2026-11-02T17:01:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/understanding-proportional-relationships/sssssb4z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-proportional-relationships/sssssb4z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-proportional-relationships/sssssb4z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-proportional-relationships/sssssb4z"/>
      <lastmod>2026-11-01T20:29:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/understanding-proportional-relationships/sssssb4z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-proportional-relationships/sssssb4z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-proportional-relationships/sssssb4z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-proportional-relationships/sssssb4z"/>
      <lastmod>2026-11-01T20:29:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-function-example/sssssb40</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-example/sssssb40"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-example/sssssb40"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-example/sssssb40"/>
      <lastmod>2026-11-02T17:00:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-function-example/sssssb40</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-example/sssssb40"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-example/sssssb40"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-example/sssssb40"/>
      <lastmod>2026-11-02T17:00:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/filling-rate-of-a-sphere/sssssb4d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/filling-rate-of-a-sphere/sssssb4d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/filling-rate-of-a-sphere/sssssb4d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/filling-rate-of-a-sphere/sssssb4d"/>
      <lastmod>2026-11-02T08:56:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/filling-rate-of-a-sphere/sssssb4d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/filling-rate-of-a-sphere/sssssb4d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/filling-rate-of-a-sphere/sssssb4d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/filling-rate-of-a-sphere/sssssb4d"/>
      <lastmod>2026-11-02T08:56:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelograms-in-triangle/sssssb4f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-in-triangle/sssssb4f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-in-triangle/sssssb4f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-in-triangle/sssssb4f"/>
      <lastmod>2026-11-02T13:42:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelograms-in-triangle/sssssb4f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-in-triangle/sssssb4f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-in-triangle/sssssb4f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-in-triangle/sssssb4f"/>
      <lastmod>2026-11-02T13:42:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-squares-and-concurrent-lines/sssssb48</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-squares-and-concurrent-lines/sssssb48"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-two-squares-and-concurrent-lines/sssssb48"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-squares-and-concurrent-lines/sssssb48"/>
      <lastmod>2026-11-02T02:27:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-two-squares-and-concurrent-lines/sssssb48</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-squares-and-concurrent-lines/sssssb48"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-two-squares-and-concurrent-lines/sssssb48"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-squares-and-concurrent-lines/sssssb48"/>
      <lastmod>2026-11-02T02:27:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pascal-s-mystical-hyperbola/sssssb4u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pascal-s-mystical-hyperbola/sssssb4u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pascal-s-mystical-hyperbola/sssssb4u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pascal-s-mystical-hyperbola/sssssb4u"/>
      <lastmod>2026-11-02T18:57:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pascal-s-mystical-hyperbola/sssssb4u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pascal-s-mystical-hyperbola/sssssb4u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pascal-s-mystical-hyperbola/sssssb4u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pascal-s-mystical-hyperbola/sssssb4u"/>
      <lastmod>2026-11-02T18:57:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-mean-inequality-and-hyperbola/sssssb45</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-mean-inequality-and-hyperbola/sssssb45"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-mean-inequality-and-hyperbola/sssssb45"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-mean-inequality-and-hyperbola/sssssb45"/>
      <lastmod>2026-11-02T08:43:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-mean-inequality-and-hyperbola/sssssb45</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-mean-inequality-and-hyperbola/sssssb45"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-mean-inequality-and-hyperbola/sssssb45"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-mean-inequality-and-hyperbola/sssssb45"/>
      <lastmod>2026-11-02T08:43:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/statistics-simulation-with-data/sssssb4b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-simulation-with-data/sssssb4b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-simulation-with-data/sssssb4b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-simulation-with-data/sssssb4b"/>
      <lastmod>2026-11-02T18:26:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/statistics-simulation-with-data/sssssb4b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-simulation-with-data/sssssb4b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-simulation-with-data/sssssb4b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-simulation-with-data/sssssb4b"/>
      <lastmod>2026-11-02T18:26:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-inequalities-example/sssssb43</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-inequalities-example/sssssb43"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-inequalities-example/sssssb43"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-inequalities-example/sssssb43"/>
      <lastmod>2026-11-02T17:03:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-inequalities-example/sssssb43</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-inequalities-example/sssssb43"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-inequalities-example/sssssb43"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-inequalities-example/sssssb43"/>
      <lastmod>2026-11-02T17:03:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-carlos-uribe-gartner/sssssb4q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-carlos-uribe-gartner/sssssb4q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-vectors-in-physics-by-carlos-uribe-gartner/sssssb4q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-carlos-uribe-gartner/sssssb4q"/>
      <lastmod>2026-11-01T21:30:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/application-of-vectors-in-physics-by-carlos-uribe-gartner/sssssb4q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-carlos-uribe-gartner/sssssb4q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-vectors-in-physics-by-carlos-uribe-gartner/sssssb4q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-carlos-uribe-gartner/sssssb4q"/>
      <lastmod>2026-11-01T21:30:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-dilations-by-debbie-steffen/sssssb41</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-dilations-by-debbie-steffen/sssssb41"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-dilations-by-debbie-steffen/sssssb41"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-dilations-by-debbie-steffen/sssssb41"/>
      <lastmod>2026-11-02T02:40:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-dilations-by-debbie-steffen/sssssb41</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-dilations-by-debbie-steffen/sssssb41"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-dilations-by-debbie-steffen/sssssb41"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-dilations-by-debbie-steffen/sssssb41"/>
      <lastmod>2026-11-02T02:40:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-bisector-theorem-demonstration/sssssb4m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-theorem-demonstration/sssssb4m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-theorem-demonstration/sssssb4m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-theorem-demonstration/sssssb4m"/>
      <lastmod>2026-11-02T02:44:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-bisector-theorem-demonstration/sssssb4m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-theorem-demonstration/sssssb4m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-theorem-demonstration/sssssb4m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-theorem-demonstration/sssssb4m"/>
      <lastmod>2026-11-02T02:44:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-time-line-tool/sssssb4j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-time-line-tool/sssssb4j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-time-line-tool/sssssb4j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-time-line-tool/sssssb4j"/>
      <lastmod>2026-11-02T09:28:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-time-line-tool/sssssb4j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-time-line-tool/sssssb4j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-time-line-tool/sssssb4j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-time-line-tool/sssssb4j"/>
      <lastmod>2026-11-02T09:28:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-christopher-richards/sssssb4p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-christopher-richards/sssssb4p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-christopher-richards/sssssb4p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-christopher-richards/sssssb4p"/>
      <lastmod>2026-11-02T18:18:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-christopher-richards/sssssb4p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-christopher-richards/sssssb4p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-christopher-richards/sssssb4p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-christopher-richards/sssssb4p"/>
      <lastmod>2026-11-02T18:18:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-inside-sphere/sssssb4w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-inside-sphere/sssssb4w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-inside-sphere/sssssb4w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-inside-sphere/sssssb4w"/>
      <lastmod>2026-11-01T19:36:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-inside-sphere/sssssb4w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-inside-sphere/sssssb4w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-inside-sphere/sssssb4w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-inside-sphere/sssssb4w"/>
      <lastmod>2026-11-01T19:36:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-dials/sssssb46</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-dials/sssssb46"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-dials/sssssb46"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-dials/sssssb46"/>
      <lastmod>2026-11-01T21:24:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-dials/sssssb46</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-dials/sssssb46"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-dials/sssssb46"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-dials/sssssb46"/>
      <lastmod>2026-11-01T21:24:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/variable-perimeter/sssssb4g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-perimeter/sssssb4g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-perimeter/sssssb4g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-perimeter/sssssb4g"/>
      <lastmod>2026-11-02T18:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/variable-perimeter/sssssb4g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-perimeter/sssssb4g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-perimeter/sssssb4g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-perimeter/sssssb4g"/>
      <lastmod>2026-11-02T18:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-cross-sections-dynamic-demonstration/sssssb49</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-cross-sections-dynamic-demonstration/sssssb49"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-cross-sections-dynamic-demonstration/sssssb49"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-cross-sections-dynamic-demonstration/sssssb49"/>
      <lastmod>2026-11-02T18:13:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-cross-sections-dynamic-demonstration/sssssb49</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-cross-sections-dynamic-demonstration/sssssb49"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-cross-sections-dynamic-demonstration/sssssb49"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-cross-sections-dynamic-demonstration/sssssb49"/>
      <lastmod>2026-11-02T18:13:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/midsegment-construction-of-a-triangle/sssssb4e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midsegment-construction-of-a-triangle/sssssb4e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midsegment-construction-of-a-triangle/sssssb4e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midsegment-construction-of-a-triangle/sssssb4e"/>
      <lastmod>2026-11-01T21:40:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/midsegment-construction-of-a-triangle/sssssb4e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midsegment-construction-of-a-triangle/sssssb4e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midsegment-construction-of-a-triangle/sssssb4e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midsegment-construction-of-a-triangle/sssssb4e"/>
      <lastmod>2026-11-01T21:40:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-of-y-e-x/sssssb4v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-of-y-e-x/sssssb4v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-of-y-e-x/sssssb4v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-of-y-e-x/sssssb4v"/>
      <lastmod>2026-11-02T12:26:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-of-y-e-x/sssssb4v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-of-y-e-x/sssssb4v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-of-y-e-x/sssssb4v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-of-y-e-x/sssssb4v"/>
      <lastmod>2026-11-02T12:26:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-multi-step-equations/sssssb44</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-multi-step-equations/sssssb44"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-multi-step-equations/sssssb44"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-multi-step-equations/sssssb44"/>
      <lastmod>2026-11-02T16:59:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-multi-step-equations/sssssb44</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-multi-step-equations/sssssb44"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-multi-step-equations/sssssb44"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-multi-step-equations/sssssb44"/>
      <lastmod>2026-11-02T16:59:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruent-line-segments-by-jalafnicole/sssssb4l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-line-segments-by-jalafnicole/sssssb4l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-line-segments-by-jalafnicole/sssssb4l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-line-segments-by-jalafnicole/sssssb4l"/>
      <lastmod>2026-11-02T16:56:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruent-line-segments-by-jalafnicole/sssssb4l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-line-segments-by-jalafnicole/sssssb4l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-line-segments-by-jalafnicole/sssssb4l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-line-segments-by-jalafnicole/sssssb4l"/>
      <lastmod>2026-11-02T16:56:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-numbers-investigation-geometric-and-vector-representation-for-ibhl/sssssb4y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-investigation-geometric-and-vector-representation-for-ibhl/sssssb4y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-investigation-geometric-and-vector-representation-for-ibhl/sssssb4y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-investigation-geometric-and-vector-representation-for-ibhl/sssssb4y"/>
      <lastmod>2026-11-02T02:51:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-numbers-investigation-geometric-and-vector-representation-for-ibhl/sssssb4y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-investigation-geometric-and-vector-representation-for-ibhl/sssssb4y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-investigation-geometric-and-vector-representation-for-ibhl/sssssb4y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-investigation-geometric-and-vector-representation-for-ibhl/sssssb4y"/>
      <lastmod>2026-11-02T02:51:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-functions-by-josh/sssssb4a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-functions-by-josh/sssssb4a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-and-vertical-translations-of-functions-by-josh/sssssb4a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-functions-by-josh/sssssb4a"/>
      <lastmod>2026-11-02T00:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-and-vertical-translations-of-functions-by-josh/sssssb4a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-functions-by-josh/sssssb4a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-and-vertical-translations-of-functions-by-josh/sssssb4a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-functions-by-josh/sssssb4a"/>
      <lastmod>2026-11-02T00:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/altitudes-of-a-triangle-orthocentre/sssssb4c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/altitudes-of-a-triangle-orthocentre/sssssb4c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/altitudes-of-a-triangle-orthocentre/sssssb4c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/altitudes-of-a-triangle-orthocentre/sssssb4c"/>
      <lastmod>2026-11-01T20:42:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/altitudes-of-a-triangle-orthocentre/sssssb4c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/altitudes-of-a-triangle-orthocentre/sssssb4c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/altitudes-of-a-triangle-orthocentre/sssssb4c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/altitudes-of-a-triangle-orthocentre/sssssb4c"/>
      <lastmod>2026-11-01T20:42:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reciprocal-function-graphs/sssssb4r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-function-graphs/sssssb4r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-function-graphs/sssssb4r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-function-graphs/sssssb4r"/>
      <lastmod>2026-11-02T17:16:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reciprocal-function-graphs/sssssb4r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-function-graphs/sssssb4r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-function-graphs/sssssb4r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-function-graphs/sssssb4r"/>
      <lastmod>2026-11-02T17:16:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/applying-volume-and-surface-area-im-7-7-16-lesson/sssssb4h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/applying-volume-and-surface-area-im-7-7-16-lesson/sssssb4h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/applying-volume-and-surface-area-im-7-7-16-lesson/sssssb4h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/applying-volume-and-surface-area-im-7-7-16-lesson/sssssb4h"/>
      <lastmod>2026-11-01T20:13:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/applying-volume-and-surface-area-im-7-7-16-lesson/sssssb4h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/applying-volume-and-surface-area-im-7-7-16-lesson/sssssb4h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/applying-volume-and-surface-area-im-7-7-16-lesson/sssssb4h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/applying-volume-and-surface-area-im-7-7-16-lesson/sssssb4h"/>
      <lastmod>2026-11-01T20:13:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/direction-fields-and-solution-curves-by-dr-doug-davis-3d/sssssb4t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direction-fields-and-solution-curves-by-dr-doug-davis-3d/sssssb4t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direction-fields-and-solution-curves-by-dr-doug-davis-3d/sssssb4t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direction-fields-and-solution-curves-by-dr-doug-davis-3d/sssssb4t"/>
      <lastmod>2026-11-02T02:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/direction-fields-and-solution-curves-by-dr-doug-davis-3d/sssssb4t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direction-fields-and-solution-curves-by-dr-doug-davis-3d/sssssb4t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direction-fields-and-solution-curves-by-dr-doug-davis-3d/sssssb4t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direction-fields-and-solution-curves-by-dr-doug-davis-3d/sssssb4t"/>
      <lastmod>2026-11-02T02:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-congruent-non-concurrent-triangles/sssssb4x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-congruent-non-concurrent-triangles/sssssb4x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-congruent-non-concurrent-triangles/sssssb4x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-congruent-non-concurrent-triangles/sssssb4x"/>
      <lastmod>2026-11-01T20:52:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-congruent-non-concurrent-triangles/sssssb4x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-congruent-non-concurrent-triangles/sssssb4x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-congruent-non-concurrent-triangles/sssssb4x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-congruent-non-concurrent-triangles/sssssb4x"/>
      <lastmod>2026-11-01T20:52:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/touching-pentagons/sssssb4i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/touching-pentagons/sssssb4i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/touching-pentagons/sssssb4i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/touching-pentagons/sssssb4i"/>
      <lastmod>2026-11-02T17:56:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/touching-pentagons/sssssb4i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/touching-pentagons/sssssb4i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/touching-pentagons/sssssb4i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/touching-pentagons/sssssb4i"/>
      <lastmod>2026-11-02T17:56:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-by-mr-duncan/sssssb4o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-by-mr-duncan/sssssb4o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-by-mr-duncan/sssssb4o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-by-mr-duncan/sssssb4o"/>
      <lastmod>2026-11-01T21:01:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-by-mr-duncan/sssssb4o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-by-mr-duncan/sssssb4o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-by-mr-duncan/sssssb4o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-by-mr-duncan/sssssb4o"/>
      <lastmod>2026-11-01T21:01:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/applying-area-of-circles-im-7-3-9-lesson/sssssbls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/applying-area-of-circles-im-7-3-9-lesson/sssssbls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/applying-area-of-circles-im-7-3-9-lesson/sssssbls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/applying-area-of-circles-im-7-3-9-lesson/sssssbls"/>
      <lastmod>2026-11-02T10:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/applying-area-of-circles-im-7-3-9-lesson/sssssbls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/applying-area-of-circles-im-7-3-9-lesson/sssssbls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/applying-area-of-circles-im-7-3-9-lesson/sssssbls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/applying-area-of-circles-im-7-3-9-lesson/sssssbls"/>
      <lastmod>2026-11-02T10:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratios-and-lengths-by-david-wees/sssssbl7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-and-lengths-by-david-wees/sssssbl7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-and-lengths-by-david-wees/sssssbl7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-and-lengths-by-david-wees/sssssbl7"/>
      <lastmod>2026-11-02T16:33:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratios-and-lengths-by-david-wees/sssssbl7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-and-lengths-by-david-wees/sssssbl7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-and-lengths-by-david-wees/sssssbl7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-and-lengths-by-david-wees/sssssbl7"/>
      <lastmod>2026-11-02T16:33:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/central-limit-theorem-demonstration/sssssbln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-limit-theorem-demonstration/sssssbln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-limit-theorem-demonstration/sssssbln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-limit-theorem-demonstration/sssssbln"/>
      <lastmod>2026-11-01T21:09:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/central-limit-theorem-demonstration/sssssbln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-limit-theorem-demonstration/sssssbln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-limit-theorem-demonstration/sssssbln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-limit-theorem-demonstration/sssssbln"/>
      <lastmod>2026-11-01T21:09:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/boat-coordinate-game/sssssbl2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/boat-coordinate-game/sssssbl2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/boat-coordinate-game/sssssbl2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/boat-coordinate-game/sssssbl2"/>
      <lastmod>2026-11-01T23:34:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/boat-coordinate-game/sssssbl2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/boat-coordinate-game/sssssbl2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/boat-coordinate-game/sssssbl2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/boat-coordinate-game/sssssbl2"/>
      <lastmod>2026-11-01T23:34:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-relationship-between-squares-and-square-roots/sssssblk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-relationship-between-squares-and-square-roots/sssssblk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-relationship-between-squares-and-square-roots/sssssblk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-relationship-between-squares-and-square-roots/sssssblk"/>
      <lastmod>2026-11-02T18:26:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-relationship-between-squares-and-square-roots/sssssblk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-relationship-between-squares-and-square-roots/sssssblk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-relationship-between-squares-and-square-roots/sssssblk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-relationship-between-squares-and-square-roots/sssssblk"/>
      <lastmod>2026-11-02T18:26:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratio-of-areas-and-volumes-of-similar-figures/sssssblz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-of-areas-and-volumes-of-similar-figures/sssssblz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-of-areas-and-volumes-of-similar-figures/sssssblz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-of-areas-and-volumes-of-similar-figures/sssssblz"/>
      <lastmod>2026-11-01T21:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratio-of-areas-and-volumes-of-similar-figures/sssssblz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-of-areas-and-volumes-of-similar-figures/sssssblz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-of-areas-and-volumes-of-similar-figures/sssssblz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-of-areas-and-volumes-of-similar-figures/sssssblz"/>
      <lastmod>2026-11-01T21:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/real-number-sets-demo/sssssbl0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-number-sets-demo/sssssbl0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-number-sets-demo/sssssbl0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-number-sets-demo/sssssbl0"/>
      <lastmod>2026-11-02T09:07:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/real-number-sets-demo/sssssbl0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-number-sets-demo/sssssbl0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-number-sets-demo/sssssbl0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-number-sets-demo/sssssbl0"/>
      <lastmod>2026-11-02T09:07:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-function-art/sssssbld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-function-art/sssssbld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-function-art/sssssbld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-function-art/sssssbld"/>
      <lastmod>2026-11-01T22:08:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-function-art/sssssbld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-function-art/sssssbld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-function-art/sssssbld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-function-art/sssssbld"/>
      <lastmod>2026-11-01T22:08:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-quiz/sssssblf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-quiz/sssssblf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-quiz/sssssblf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-quiz/sssssblf"/>
      <lastmod>2026-11-02T16:30:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-quiz/sssssblf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-quiz/sssssblf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-quiz/sssssblf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-quiz/sssssblf"/>
      <lastmod>2026-11-02T16:30:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/thales-theorem-and-similar-triangles-beginning/sssssbl8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/thales-theorem-and-similar-triangles-beginning/sssssbl8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/thales-theorem-and-similar-triangles-beginning/sssssbl8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/thales-theorem-and-similar-triangles-beginning/sssssbl8"/>
      <lastmod>2026-11-02T17:54:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/thales-theorem-and-similar-triangles-beginning/sssssbl8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/thales-theorem-and-similar-triangles-beginning/sssssbl8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/thales-theorem-and-similar-triangles-beginning/sssssbl8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/thales-theorem-and-similar-triangles-beginning/sssssbl8"/>
      <lastmod>2026-11-02T17:54:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-selecting-balls-by-elmouttaki-ayoub/sssssblu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-elmouttaki-ayoub/sssssblu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-selecting-balls-by-elmouttaki-ayoub/sssssblu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-elmouttaki-ayoub/sssssblu"/>
      <lastmod>2026-11-02T18:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-selecting-balls-by-elmouttaki-ayoub/sssssblu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-elmouttaki-ayoub/sssssblu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-selecting-balls-by-elmouttaki-ayoub/sssssblu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-elmouttaki-ayoub/sssssblu"/>
      <lastmod>2026-11-02T18:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-is-abc-related-to-fun/sssssbl5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-is-abc-related-to-fun/sssssbl5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-is-abc-related-to-fun/sssssbl5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-is-abc-related-to-fun/sssssbl5"/>
      <lastmod>2026-11-02T00:32:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-is-abc-related-to-fun/sssssbl5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-is-abc-related-to-fun/sssssbl5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-is-abc-related-to-fun/sssssbl5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-is-abc-related-to-fun/sssssbl5"/>
      <lastmod>2026-11-02T00:32:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramids-in-a-prism/sssssblb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramids-in-a-prism/sssssblb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramids-in-a-prism/sssssblb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramids-in-a-prism/sssssblb"/>
      <lastmod>2026-11-02T11:47:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramids-in-a-prism/sssssblb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramids-in-a-prism/sssssblb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramids-in-a-prism/sssssblb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramids-in-a-prism/sssssblb"/>
      <lastmod>2026-11-02T11:47:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-nth-roots-of-unity/sssssbl3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-nth-roots-of-unity/sssssbl3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-nth-roots-of-unity/sssssbl3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-nth-roots-of-unity/sssssbl3"/>
      <lastmod>2026-11-02T13:52:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-nth-roots-of-unity/sssssbl3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-nth-roots-of-unity/sssssbl3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-nth-roots-of-unity/sssssbl3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-nth-roots-of-unity/sssssbl3"/>
      <lastmod>2026-11-02T13:52:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identifying-trig-ratios-quick-formative-assessment-by-dan-dale/sssssblq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-trig-ratios-quick-formative-assessment-by-dan-dale/sssssblq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-trig-ratios-quick-formative-assessment-by-dan-dale/sssssblq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-trig-ratios-quick-formative-assessment-by-dan-dale/sssssblq"/>
      <lastmod>2026-11-02T14:52:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identifying-trig-ratios-quick-formative-assessment-by-dan-dale/sssssblq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-trig-ratios-quick-formative-assessment-by-dan-dale/sssssblq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-trig-ratios-quick-formative-assessment-by-dan-dale/sssssblq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-trig-ratios-quick-formative-assessment-by-dan-dale/sssssblq"/>
      <lastmod>2026-11-02T14:52:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiples-of-7-circle-sort/sssssbl1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiples-of-7-circle-sort/sssssbl1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiples-of-7-circle-sort/sssssbl1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiples-of-7-circle-sort/sssssbl1"/>
      <lastmod>2026-11-01T20:54:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiples-of-7-circle-sort/sssssbl1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiples-of-7-circle-sort/sssssbl1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiples-of-7-circle-sort/sssssbl1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiples-of-7-circle-sort/sssssbl1"/>
      <lastmod>2026-11-01T20:54:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nth-roots-of-a-complex-number-by-brian-sterr/sssssblm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nth-roots-of-a-complex-number-by-brian-sterr/sssssblm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nth-roots-of-a-complex-number-by-brian-sterr/sssssblm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nth-roots-of-a-complex-number-by-brian-sterr/sssssblm"/>
      <lastmod>2026-11-02T18:18:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nth-roots-of-a-complex-number-by-brian-sterr/sssssblm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nth-roots-of-a-complex-number-by-brian-sterr/sssssblm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nth-roots-of-a-complex-number-by-brian-sterr/sssssblm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nth-roots-of-a-complex-number-by-brian-sterr/sssssblm"/>
      <lastmod>2026-11-02T18:18:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-volumes-of-rectangular-prisms/sssssblj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-volumes-of-rectangular-prisms/sssssblj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-volumes-of-rectangular-prisms/sssssblj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-volumes-of-rectangular-prisms/sssssblj"/>
      <lastmod>2026-11-02T15:05:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-volumes-of-rectangular-prisms/sssssblj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-volumes-of-rectangular-prisms/sssssblj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-volumes-of-rectangular-prisms/sssssblj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-volumes-of-rectangular-prisms/sssssblj"/>
      <lastmod>2026-11-02T15:05:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-three-dice/sssssblp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-three-dice/sssssblp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-three-dice/sssssblp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-three-dice/sssssblp"/>
      <lastmod>2026-11-02T16:37:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-three-dice/sssssblp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-three-dice/sssssblp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-three-dice/sssssblp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-three-dice/sssssblp"/>
      <lastmod>2026-11-02T16:37:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sweep-probability-question/sssssblw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sweep-probability-question/sssssblw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sweep-probability-question/sssssblw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sweep-probability-question/sssssblw"/>
      <lastmod>2026-11-02T17:08:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sweep-probability-question/sssssblw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sweep-probability-question/sssssblw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sweep-probability-question/sssssblw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sweep-probability-question/sssssblw"/>
      <lastmod>2026-11-02T17:08:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-relationship-between-angles-in-tangent-circles/sssssbl6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-between-angles-in-tangent-circles/sssssbl6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-between-angles-in-tangent-circles/sssssbl6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-between-angles-in-tangent-circles/sssssbl6"/>
      <lastmod>2026-11-02T18:02:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-relationship-between-angles-in-tangent-circles/sssssbl6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-between-angles-in-tangent-circles/sssssbl6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-between-angles-in-tangent-circles/sssssbl6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-between-angles-in-tangent-circles/sssssbl6"/>
      <lastmod>2026-11-02T18:02:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponents-of-2-positive-negative-zero/sssssblg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-of-2-positive-negative-zero/sssssblg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-of-2-positive-negative-zero/sssssblg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-of-2-positive-negative-zero/sssssblg"/>
      <lastmod>2026-11-01T21:32:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponents-of-2-positive-negative-zero/sssssblg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-of-2-positive-negative-zero/sssssblg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-of-2-positive-negative-zero/sssssblg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-of-2-positive-negative-zero/sssssblg"/>
      <lastmod>2026-11-01T21:32:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/centroid-and-circumcenter-demo/sssssbl9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-and-circumcenter-demo/sssssbl9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-and-circumcenter-demo/sssssbl9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-and-circumcenter-demo/sssssbl9"/>
      <lastmod>2026-11-02T18:43:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/centroid-and-circumcenter-demo/sssssbl9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-and-circumcenter-demo/sssssbl9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-and-circumcenter-demo/sssssbl9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-and-circumcenter-demo/sssssbl9"/>
      <lastmod>2026-11-02T18:43:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-matching/sssssble</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-matching/sssssble"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-matching/sssssble"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-matching/sssssble"/>
      <lastmod>2026-11-01T22:09:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-matching/sssssble</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-matching/sssssble"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-matching/sssssble"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-matching/sssssble"/>
      <lastmod>2026-11-01T22:09:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-moving-in-the-plane/sssssblv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-moving-in-the-plane/sssssblv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-moving-in-the-plane/sssssblv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-moving-in-the-plane/sssssblv"/>
      <lastmod>2026-11-01T20:31:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-moving-in-the-plane/sssssblv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-moving-in-the-plane/sssssblv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-moving-in-the-plane/sssssblv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-moving-in-the-plane/sssssblv"/>
      <lastmod>2026-11-01T20:31:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ferris-wheel-animation-sine-function-and-trigonometric-relations/sssssbl4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ferris-wheel-animation-sine-function-and-trigonometric-relations/sssssbl4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ferris-wheel-animation-sine-function-and-trigonometric-relations/sssssbl4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ferris-wheel-animation-sine-function-and-trigonometric-relations/sssssbl4"/>
      <lastmod>2026-11-01T19:20:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ferris-wheel-animation-sine-function-and-trigonometric-relations/sssssbl4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ferris-wheel-animation-sine-function-and-trigonometric-relations/sssssbl4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ferris-wheel-animation-sine-function-and-trigonometric-relations/sssssbl4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ferris-wheel-animation-sine-function-and-trigonometric-relations/sssssbl4"/>
      <lastmod>2026-11-01T19:20:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shortest-path-on-a-sphere/sssssbll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shortest-path-on-a-sphere/sssssbll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shortest-path-on-a-sphere/sssssbll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shortest-path-on-a-sphere/sssssbll"/>
      <lastmod>2026-11-02T03:19:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shortest-path-on-a-sphere/sssssbll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shortest-path-on-a-sphere/sssssbll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shortest-path-on-a-sphere/sssssbll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shortest-path-on-a-sphere/sssssbll"/>
      <lastmod>2026-11-02T03:19:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-relationship/sssssbly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-relationship/sssssbly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-relationship/sssssbly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-relationship/sssssbly"/>
      <lastmod>2026-11-01T19:01:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-relationship/sssssbly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-relationship/sssssbly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-relationship/sssssbly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-relationship/sssssbly"/>
      <lastmod>2026-11-01T19:01:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/math-art/sssssbla</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-art/sssssbla"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-art/sssssbla"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-art/sssssbla"/>
      <lastmod>2026-11-01T19:18:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/math-art/sssssbla</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-art/sssssbla"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-art/sssssbla"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-art/sssssbla"/>
      <lastmod>2026-11-01T19:18:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-properties-of-parallelograms/sssssblc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-properties-of-parallelograms/sssssblc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-properties-of-parallelograms/sssssblc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-properties-of-parallelograms/sssssblc"/>
      <lastmod>2026-11-01T23:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-properties-of-parallelograms/sssssblc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-properties-of-parallelograms/sssssblc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-properties-of-parallelograms/sssssblc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-properties-of-parallelograms/sssssblc"/>
      <lastmod>2026-11-01T23:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-probability-curve-demo/sssssblr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-probability-curve-demo/sssssblr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-probability-curve-demo/sssssblr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-probability-curve-demo/sssssblr"/>
      <lastmod>2026-11-02T14:58:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-probability-curve-demo/sssssblr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-probability-curve-demo/sssssblr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-probability-curve-demo/sssssblr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-probability-curve-demo/sssssblr"/>
      <lastmod>2026-11-02T14:58:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-fraction-division/sssssblh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-fraction-division/sssssblh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-fraction-division/sssssblh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-fraction-division/sssssblh"/>
      <lastmod>2026-11-01T23:52:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-fraction-division/sssssblh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-fraction-division/sssssblh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-fraction-division/sssssblh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-fraction-division/sssssblh"/>
      <lastmod>2026-11-01T23:52:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-intersection-demo/sssssblt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-intersection-demo/sssssblt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-intersection-demo/sssssblt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-intersection-demo/sssssblt"/>
      <lastmod>2026-11-01T23:51:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-intersection-demo/sssssblt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-intersection-demo/sssssblt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-intersection-demo/sssssblt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-intersection-demo/sssssblt"/>
      <lastmod>2026-11-01T23:51:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vibrant-cous-cous-math-demonstration/sssssblx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vibrant-cous-cous-math-demonstration/sssssblx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vibrant-cous-cous-math-demonstration/sssssblx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vibrant-cous-cous-math-demonstration/sssssblx"/>
      <lastmod>2026-11-02T17:42:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vibrant-cous-cous-math-demonstration/sssssblx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vibrant-cous-cous-math-demonstration/sssssblx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vibrant-cous-cous-math-demonstration/sssssblx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vibrant-cous-cous-math-demonstration/sssssblx"/>
      <lastmod>2026-11-02T17:42:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-exponential-functions-by-mischaboswellbeta/sssssbli</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-exponential-functions-by-mischaboswellbeta/sssssbli"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-exponential-functions-by-mischaboswellbeta/sssssbli"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-exponential-functions-by-mischaboswellbeta/sssssbli"/>
      <lastmod>2026-11-02T16:36:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-exponential-functions-by-mischaboswellbeta/sssssbli</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-exponential-functions-by-mischaboswellbeta/sssssbli"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-exponential-functions-by-mischaboswellbeta/sssssbli"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-exponential-functions-by-mischaboswellbeta/sssssbli"/>
      <lastmod>2026-11-02T16:36:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-the-centroid-of-an-area/sssssblo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-the-centroid-of-an-area/sssssblo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-the-centroid-of-an-area/sssssblo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-the-centroid-of-an-area/sssssblo"/>
      <lastmod>2026-11-02T00:21:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-the-centroid-of-an-area/sssssblo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-the-centroid-of-an-area/sssssblo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-the-centroid-of-an-area/sssssblo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-the-centroid-of-an-area/sssssblo"/>
      <lastmod>2026-11-02T00:21:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-ellipse/sssssbys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-ellipse/sssssbys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-ellipse/sssssbys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-ellipse/sssssbys"/>
      <lastmod>2026-11-01T21:18:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-ellipse/sssssbys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-ellipse/sssssbys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-ellipse/sssssbys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-ellipse/sssssbys"/>
      <lastmod>2026-11-01T21:18:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-sine-cosine-functions/sssssby7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-cosine-functions/sssssby7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-cosine-functions/sssssby7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-cosine-functions/sssssby7"/>
      <lastmod>2026-11-01T21:23:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-sine-cosine-functions/sssssby7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-cosine-functions/sssssby7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-cosine-functions/sssssby7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-cosine-functions/sssssby7"/>
      <lastmod>2026-11-01T21:23:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/order-of-rotational-symmetry/sssssbyn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/order-of-rotational-symmetry/sssssbyn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/order-of-rotational-symmetry/sssssbyn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/order-of-rotational-symmetry/sssssbyn"/>
      <lastmod>2026-11-02T13:37:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/order-of-rotational-symmetry/sssssbyn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/order-of-rotational-symmetry/sssssbyn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/order-of-rotational-symmetry/sssssbyn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/order-of-rotational-symmetry/sssssbyn"/>
      <lastmod>2026-11-02T13:37:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mapping-diagrams-composite-functions/sssssby2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagrams-composite-functions/sssssby2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagrams-composite-functions/sssssby2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagrams-composite-functions/sssssby2"/>
      <lastmod>2026-11-02T12:30:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mapping-diagrams-composite-functions/sssssby2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagrams-composite-functions/sssssby2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagrams-composite-functions/sssssby2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagrams-composite-functions/sssssby2"/>
      <lastmod>2026-11-02T12:30:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-quadratic-functions-ax-bx-c-0/sssssbyk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-quadratic-functions-ax-bx-c-0/sssssbyk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-quadratic-functions-ax-bx-c-0/sssssbyk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-quadratic-functions-ax-bx-c-0/sssssbyk"/>
      <lastmod>2026-11-01T19:14:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-quadratic-functions-ax-bx-c-0/sssssbyk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-quadratic-functions-ax-bx-c-0/sssssbyk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-quadratic-functions-ax-bx-c-0/sssssbyk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-quadratic-functions-ax-bx-c-0/sssssbyk"/>
      <lastmod>2026-11-01T19:14:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-numbers-game/sssssbyz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-numbers-game/sssssbyz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-numbers-game/sssssbyz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-numbers-game/sssssbyz"/>
      <lastmod>2026-11-02T09:56:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-numbers-game/sssssbyz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-numbers-game/sssssbyz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-numbers-game/sssssbyz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-numbers-game/sssssbyz"/>
      <lastmod>2026-11-02T09:56:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/julia-set-fractal-c-0-38-0-34i-in-the-complex-plane/sssssby0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/julia-set-fractal-c-0-38-0-34i-in-the-complex-plane/sssssby0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/julia-set-fractal-c-0-38-0-34i-in-the-complex-plane/sssssby0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/julia-set-fractal-c-0-38-0-34i-in-the-complex-plane/sssssby0"/>
      <lastmod>2026-11-01T21:12:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/julia-set-fractal-c-0-38-0-34i-in-the-complex-plane/sssssby0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/julia-set-fractal-c-0-38-0-34i-in-the-complex-plane/sssssby0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/julia-set-fractal-c-0-38-0-34i-in-the-complex-plane/sssssby0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/julia-set-fractal-c-0-38-0-34i-in-the-complex-plane/sssssby0"/>
      <lastmod>2026-11-01T21:12:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-triangle-ii-30-60-90-triangle-as-half-an-equilateral-triangle/sssssbyd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-triangle-ii-30-60-90-triangle-as-half-an-equilateral-triangle/sssssbyd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-triangle-ii-30-60-90-triangle-as-half-an-equilateral-triangle/sssssbyd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-triangle-ii-30-60-90-triangle-as-half-an-equilateral-triangle/sssssbyd"/>
      <lastmod>2026-11-02T00:52:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-triangle-ii-30-60-90-triangle-as-half-an-equilateral-triangle/sssssbyd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-triangle-ii-30-60-90-triangle-as-half-an-equilateral-triangle/sssssbyd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-triangle-ii-30-60-90-triangle-as-half-an-equilateral-triangle/sssssbyd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-triangle-ii-30-60-90-triangle-as-half-an-equilateral-triangle/sssssbyd"/>
      <lastmod>2026-11-02T00:52:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/filling-a-cone-dv-dt-vs-dh-dt-constant/sssssbyf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/filling-a-cone-dv-dt-vs-dh-dt-constant/sssssbyf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/filling-a-cone-dv-dt-vs-dh-dt-constant/sssssbyf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/filling-a-cone-dv-dt-vs-dh-dt-constant/sssssbyf"/>
      <lastmod>2026-11-02T17:57:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/filling-a-cone-dv-dt-vs-dh-dt-constant/sssssbyf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/filling-a-cone-dv-dt-vs-dh-dt-constant/sssssbyf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/filling-a-cone-dv-dt-vs-dh-dt-constant/sssssbyf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/filling-a-cone-dv-dt-vs-dh-dt-constant/sssssbyf"/>
      <lastmod>2026-11-02T17:57:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-of-objects-addition/sssssby8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-objects-addition/sssssby8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-objects-addition/sssssby8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-objects-addition/sssssby8"/>
      <lastmod>2026-11-02T16:42:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-of-objects-addition/sssssby8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-objects-addition/sssssby8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-objects-addition/sssssby8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-objects-addition/sssssby8"/>
      <lastmod>2026-11-02T16:42:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pedal-point-construction-of-conics/sssssbyu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pedal-point-construction-of-conics/sssssbyu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pedal-point-construction-of-conics/sssssbyu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pedal-point-construction-of-conics/sssssbyu"/>
      <lastmod>2026-11-02T18:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pedal-point-construction-of-conics/sssssbyu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pedal-point-construction-of-conics/sssssbyu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pedal-point-construction-of-conics/sssssbyu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pedal-point-construction-of-conics/sssssbyu"/>
      <lastmod>2026-11-02T18:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-of-tangent-to-parabola/sssssby5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-of-tangent-to-parabola/sssssby5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-of-tangent-to-parabola/sssssby5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-of-tangent-to-parabola/sssssby5"/>
      <lastmod>2026-11-02T02:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-of-tangent-to-parabola/sssssby5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-of-tangent-to-parabola/sssssby5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-of-tangent-to-parabola/sssssby5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-of-tangent-to-parabola/sssssby5"/>
      <lastmod>2026-11-02T02:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-parametric-equations/sssssbyb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-parametric-equations/sssssbyb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-parametric-equations/sssssbyb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-parametric-equations/sssssbyb"/>
      <lastmod>2026-11-02T02:50:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-parametric-equations/sssssbyb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-parametric-equations/sssssbyb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-parametric-equations/sssssbyb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-parametric-equations/sssssbyb"/>
      <lastmod>2026-11-02T02:50:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-with-slider-animation/sssssby3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-with-slider-animation/sssssby3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-with-slider-animation/sssssby3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-with-slider-animation/sssssby3"/>
      <lastmod>2026-11-02T00:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-with-slider-animation/sssssby3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-with-slider-animation/sssssby3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-with-slider-animation/sssssby3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-with-slider-animation/sssssby3"/>
      <lastmod>2026-11-02T00:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rounding-to-10s-100s-1000s/sssssbyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rounding-to-10s-100s-1000s/sssssbyq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rounding-to-10s-100s-1000s/sssssbyq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rounding-to-10s-100s-1000s/sssssbyq"/>
      <lastmod>2026-11-02T18:46:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rounding-to-10s-100s-1000s/sssssbyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rounding-to-10s-100s-1000s/sssssbyq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rounding-to-10s-100s-1000s/sssssbyq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rounding-to-10s-100s-1000s/sssssbyq"/>
      <lastmod>2026-11-02T18:46:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-trapezoid-area-discovery/sssssby1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-trapezoid-area-discovery/sssssby1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-trapezoid-area-discovery/sssssby1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-trapezoid-area-discovery/sssssby1"/>
      <lastmod>2026-11-01T23:57:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-trapezoid-area-discovery/sssssby1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-trapezoid-area-discovery/sssssby1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-trapezoid-area-discovery/sssssby1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-trapezoid-area-discovery/sssssby1"/>
      <lastmod>2026-11-01T23:57:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/droz-farny-line-on-a-sphere/sssssbym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/droz-farny-line-on-a-sphere/sssssbym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/droz-farny-line-on-a-sphere/sssssbym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/droz-farny-line-on-a-sphere/sssssbym"/>
      <lastmod>2026-11-02T03:18:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/droz-farny-line-on-a-sphere/sssssbym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/droz-farny-line-on-a-sphere/sssssbym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/droz-farny-line-on-a-sphere/sssssbym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/droz-farny-line-on-a-sphere/sssssbym"/>
      <lastmod>2026-11-02T03:18:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-vector-translation-demonstration/sssssbyj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vector-translation-demonstration/sssssbyj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vector-translation-demonstration/sssssbyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vector-translation-demonstration/sssssbyj"/>
      <lastmod>2026-11-02T02:21:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-vector-translation-demonstration/sssssbyj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vector-translation-demonstration/sssssbyj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vector-translation-demonstration/sssssbyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vector-translation-demonstration/sssssbyj"/>
      <lastmod>2026-11-02T02:21:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-planes-demonstration/sssssbyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-planes-demonstration/sssssbyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-planes-demonstration/sssssbyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-planes-demonstration/sssssbyp"/>
      <lastmod>2026-11-02T17:07:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-planes-demonstration/sssssbyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-planes-demonstration/sssssbyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-planes-demonstration/sssssbyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-planes-demonstration/sssssbyp"/>
      <lastmod>2026-11-02T17:07:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-of-peripheral-circles/sssssbyw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-of-peripheral-circles/sssssbyw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-of-peripheral-circles/sssssbyw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-of-peripheral-circles/sssssbyw"/>
      <lastmod>2026-11-01T23:16:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-of-peripheral-circles/sssssbyw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-of-peripheral-circles/sssssbyw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-of-peripheral-circles/sssssbyw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-of-peripheral-circles/sssssbyw"/>
      <lastmod>2026-11-01T23:16:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-circles-and-dynamic-illustration/sssssby6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-circles-and-dynamic-illustration/sssssby6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-circles-and-dynamic-illustration/sssssby6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-circles-and-dynamic-illustration/sssssby6"/>
      <lastmod>2026-11-01T22:04:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-circles-and-dynamic-illustration/sssssby6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-circles-and-dynamic-illustration/sssssby6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-circles-and-dynamic-illustration/sssssby6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-circles-and-dynamic-illustration/sssssby6"/>
      <lastmod>2026-11-01T22:04:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinates-and-reflections-level-3/sssssbyg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinates-and-reflections-level-3/sssssbyg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinates-and-reflections-level-3/sssssbyg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinates-and-reflections-level-3/sssssbyg"/>
      <lastmod>2026-11-02T17:45:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinates-and-reflections-level-3/sssssbyg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinates-and-reflections-level-3/sssssbyg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinates-and-reflections-level-3/sssssbyg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinates-and-reflections-level-3/sssssbyg"/>
      <lastmod>2026-11-02T17:45:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-quiz-systems-of-equations/sssssby9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-quiz-systems-of-equations/sssssby9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-quiz-systems-of-equations/sssssby9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-quiz-systems-of-equations/sssssby9"/>
      <lastmod>2026-11-02T18:39:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-quiz-systems-of-equations/sssssby9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-quiz-systems-of-equations/sssssby9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-quiz-systems-of-equations/sssssby9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-quiz-systems-of-equations/sssssby9"/>
      <lastmod>2026-11-02T18:39:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bearing-illustrator-2/sssssbye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bearing-illustrator-2/sssssbye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bearing-illustrator-2/sssssbye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bearing-illustrator-2/sssssbye"/>
      <lastmod>2026-11-02T18:54:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bearing-illustrator-2/sssssbye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bearing-illustrator-2/sssssbye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bearing-illustrator-2/sssssbye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bearing-illustrator-2/sssssbye"/>
      <lastmod>2026-11-02T18:54:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-normal-curve-probability/sssssbyv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-normal-curve-probability/sssssbyv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-normal-curve-probability/sssssbyv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-normal-curve-probability/sssssbyv"/>
      <lastmod>2026-11-02T08:46:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-normal-curve-probability/sssssbyv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-normal-curve-probability/sssssbyv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-normal-curve-probability/sssssbyv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-normal-curve-probability/sssssbyv"/>
      <lastmod>2026-11-02T08:46:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-perimeter/sssssby4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-perimeter/sssssby4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-perimeter/sssssby4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-perimeter/sssssby4"/>
      <lastmod>2026-11-02T16:43:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-perimeter/sssssby4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-perimeter/sssssby4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-perimeter/sssssby4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-perimeter/sssssby4"/>
      <lastmod>2026-11-02T16:43:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/water-surface-wave/sssssbyl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/water-surface-wave/sssssbyl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/water-surface-wave/sssssbyl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/water-surface-wave/sssssbyl"/>
      <lastmod>2026-11-02T08:38:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/water-surface-wave/sssssbyl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/water-surface-wave/sssssbyl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/water-surface-wave/sssssbyl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/water-surface-wave/sssssbyl"/>
      <lastmod>2026-11-02T08:38:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-graphing-eq-in-general-form-quiz/sssssbyy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-graphing-eq-in-general-form-quiz/sssssbyy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-graphing-eq-in-general-form-quiz/sssssbyy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-graphing-eq-in-general-form-quiz/sssssbyy"/>
      <lastmod>2026-11-01T21:34:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-graphing-eq-in-general-form-quiz/sssssbyy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-graphing-eq-in-general-form-quiz/sssssbyy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-graphing-eq-in-general-form-quiz/sssssbyy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-graphing-eq-in-general-form-quiz/sssssbyy"/>
      <lastmod>2026-11-01T21:34:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/max-bill-geometric-construction-by-mihaela-git-3/sssssbya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-geometric-construction-by-mihaela-git-3/sssssbya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-geometric-construction-by-mihaela-git-3/sssssbya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-geometric-construction-by-mihaela-git-3/sssssbya"/>
      <lastmod>2026-11-02T17:50:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/max-bill-geometric-construction-by-mihaela-git-3/sssssbya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-geometric-construction-by-mihaela-git-3/sssssbya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-geometric-construction-by-mihaela-git-3/sssssbya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-geometric-construction-by-mihaela-git-3/sssssbya"/>
      <lastmod>2026-11-02T17:50:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-inequalities-by-depy-makri/sssssbyc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-depy-makri/sssssbyc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-by-depy-makri/sssssbyc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-depy-makri/sssssbyc"/>
      <lastmod>2026-11-02T18:51:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-inequalities-by-depy-makri/sssssbyc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-depy-makri/sssssbyc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-by-depy-makri/sssssbyc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-depy-makri/sssssbyc"/>
      <lastmod>2026-11-02T18:51:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-congruence-verification/sssssbyr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-verification/sssssbyr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-verification/sssssbyr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-verification/sssssbyr"/>
      <lastmod>2026-11-01T23:51:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-congruence-verification/sssssbyr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-verification/sssssbyr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-verification/sssssbyr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-verification/sssssbyr"/>
      <lastmod>2026-11-01T23:51:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squares-set-demonstration/sssssbyh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-set-demonstration/sssssbyh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-set-demonstration/sssssbyh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-set-demonstration/sssssbyh"/>
      <lastmod>2026-11-01T19:00:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/squares-set-demonstration/sssssbyh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-set-demonstration/sssssbyh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-set-demonstration/sssssbyh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-set-demonstration/sssssbyh"/>
      <lastmod>2026-11-01T19:00:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-parabolas-with-ancient-tools/sssssbyt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-parabolas-with-ancient-tools/sssssbyt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-parabolas-with-ancient-tools/sssssbyt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-parabolas-with-ancient-tools/sssssbyt"/>
      <lastmod>2026-11-02T16:49:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-parabolas-with-ancient-tools/sssssbyt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-parabolas-with-ancient-tools/sssssbyt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-parabolas-with-ancient-tools/sssssbyt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-parabolas-with-ancient-tools/sssssbyt"/>
      <lastmod>2026-11-02T16:49:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-an-equilateral-triangle-problem/sssssbyx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-an-equilateral-triangle-problem/sssssbyx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-an-equilateral-triangle-problem/sssssbyx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-an-equilateral-triangle-problem/sssssbyx"/>
      <lastmod>2026-11-02T09:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-an-equilateral-triangle-problem/sssssbyx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-an-equilateral-triangle-problem/sssssbyx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-an-equilateral-triangle-problem/sssssbyx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-an-equilateral-triangle-problem/sssssbyx"/>
      <lastmod>2026-11-02T09:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parameterized-gauss-system/sssssbyi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parameterized-gauss-system/sssssbyi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parameterized-gauss-system/sssssbyi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parameterized-gauss-system/sssssbyi"/>
      <lastmod>2026-11-02T17:12:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parameterized-gauss-system/sssssbyi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parameterized-gauss-system/sssssbyi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parameterized-gauss-system/sssssbyi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parameterized-gauss-system/sssssbyi"/>
      <lastmod>2026-11-02T17:12:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-square/sssssbyo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-square/sssssbyo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-square/sssssbyo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-square/sssssbyo"/>
      <lastmod>2026-11-02T18:27:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-square/sssssbyo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-square/sssssbyo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-square/sssssbyo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-square/sssssbyo"/>
      <lastmod>2026-11-02T18:27:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolic-cylinder-dynamic-construction-and-visualization/sssssbas</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-cylinder-dynamic-construction-and-visualization/sssssbas"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-cylinder-dynamic-construction-and-visualization/sssssbas"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-cylinder-dynamic-construction-and-visualization/sssssbas"/>
      <lastmod>2026-11-02T18:40:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabolic-cylinder-dynamic-construction-and-visualization/sssssbas</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-cylinder-dynamic-construction-and-visualization/sssssbas"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-cylinder-dynamic-construction-and-visualization/sssssbas"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-cylinder-dynamic-construction-and-visualization/sssssbas"/>
      <lastmod>2026-11-02T18:40:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-asymptotes-demo/sssssba7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-asymptotes-demo/sssssba7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-asymptotes-demo/sssssba7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-asymptotes-demo/sssssba7"/>
      <lastmod>2026-11-02T02:17:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-asymptotes-demo/sssssba7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-asymptotes-demo/sssssba7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-asymptotes-demo/sssssba7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-asymptotes-demo/sssssba7"/>
      <lastmod>2026-11-02T02:17:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-beyond-0-and-2-sine-and-cosine-of-any-angle/sssssban</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-beyond-0-and-2-sine-and-cosine-of-any-angle/sssssban"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-beyond-0-and-2-sine-and-cosine-of-any-angle/sssssban"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-beyond-0-and-2-sine-and-cosine-of-any-angle/sssssban"/>
      <lastmod>2026-11-01T20:47:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-beyond-0-and-2-sine-and-cosine-of-any-angle/sssssban</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-beyond-0-and-2-sine-and-cosine-of-any-angle/sssssban"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-beyond-0-and-2-sine-and-cosine-of-any-angle/sssssban"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-beyond-0-and-2-sine-and-cosine-of-any-angle/sssssban"/>
      <lastmod>2026-11-01T20:47:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-comparison-of-ln-x-and-ln-x/sssssba2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-comparison-of-ln-x-and-ln-x/sssssba2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-comparison-of-ln-x-and-ln-x/sssssba2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-comparison-of-ln-x-and-ln-x/sssssba2"/>
      <lastmod>2026-11-02T03:05:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-comparison-of-ln-x-and-ln-x/sssssba2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-comparison-of-ln-x-and-ln-x/sssssba2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-comparison-of-ln-x-and-ln-x/sssssba2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-comparison-of-ln-x-and-ln-x/sssssba2"/>
      <lastmod>2026-11-02T03:05:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-and-tangent-construction/sssssbak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-tangent-construction/sssssbak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-tangent-construction/sssssbak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-tangent-construction/sssssbak"/>
      <lastmod>2026-11-02T15:48:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-and-tangent-construction/sssssbak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-tangent-construction/sssssbak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-tangent-construction/sssssbak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-tangent-construction/sssssbak"/>
      <lastmod>2026-11-02T15:48:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-using-cubes/sssssbaz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-using-cubes/sssssbaz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-using-cubes/sssssbaz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-using-cubes/sssssbaz"/>
      <lastmod>2026-11-02T18:17:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-using-cubes/sssssbaz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-using-cubes/sssssbaz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-using-cubes/sssssbaz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-using-cubes/sssssbaz"/>
      <lastmod>2026-11-02T18:17:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-inscribed-in-sphere/sssssba0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-inscribed-in-sphere/sssssba0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-inscribed-in-sphere/sssssba0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-inscribed-in-sphere/sssssba0"/>
      <lastmod>2026-11-02T08:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-inscribed-in-sphere/sssssba0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-inscribed-in-sphere/sssssba0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-inscribed-in-sphere/sssssba0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-inscribed-in-sphere/sssssba0"/>
      <lastmod>2026-11-02T08:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-of-functions/sssssbad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-of-functions/sssssbad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-of-functions/sssssbad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-of-functions/sssssbad"/>
      <lastmod>2026-11-01T19:16:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-of-functions/sssssbad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-of-functions/sssssbad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-of-functions/sssssbad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-of-functions/sssssbad"/>
      <lastmod>2026-11-01T19:16:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-area-under-curve/sssssbaf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-area-under-curve/sssssbaf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-area-under-curve/sssssbaf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-area-under-curve/sssssbaf"/>
      <lastmod>2026-11-02T00:16:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-area-under-curve/sssssbaf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-area-under-curve/sssssbaf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-area-under-curve/sssssbaf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-area-under-curve/sssssbaf"/>
      <lastmod>2026-11-02T00:16:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-example-integral-and-logarithm-functions/sssssba8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-integral-and-logarithm-functions/sssssba8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-integral-and-logarithm-functions/sssssba8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-integral-and-logarithm-functions/sssssba8"/>
      <lastmod>2026-11-02T18:39:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-example-integral-and-logarithm-functions/sssssba8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-integral-and-logarithm-functions/sssssba8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-integral-and-logarithm-functions/sssssba8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-integral-and-logarithm-functions/sssssba8"/>
      <lastmod>2026-11-02T18:39:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/10-and-11-pointed-stars/sssssbau</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/10-and-11-pointed-stars/sssssbau"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/10-and-11-pointed-stars/sssssbau"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/10-and-11-pointed-stars/sssssbau"/>
      <lastmod>2026-11-01T19:34:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/10-and-11-pointed-stars/sssssbau</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/10-and-11-pointed-stars/sssssbau"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/10-and-11-pointed-stars/sssssbau"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/10-and-11-pointed-stars/sssssbau"/>
      <lastmod>2026-11-01T19:34:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/altitudes-and-orthocenter-of-a-triangle-by-donald-york/sssssba5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/altitudes-and-orthocenter-of-a-triangle-by-donald-york/sssssba5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/altitudes-and-orthocenter-of-a-triangle-by-donald-york/sssssba5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/altitudes-and-orthocenter-of-a-triangle-by-donald-york/sssssba5"/>
      <lastmod>2026-11-01T21:19:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/altitudes-and-orthocenter-of-a-triangle-by-donald-york/sssssba5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/altitudes-and-orthocenter-of-a-triangle-by-donald-york/sssssba5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/altitudes-and-orthocenter-of-a-triangle-by-donald-york/sssssba5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/altitudes-and-orthocenter-of-a-triangle-by-donald-york/sssssba5"/>
      <lastmod>2026-11-01T21:19:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-screw-bisection-of-a-cone/sssssbab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-screw-bisection-of-a-cone/sssssbab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-screw-bisection-of-a-cone/sssssbab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-screw-bisection-of-a-cone/sssssbab"/>
      <lastmod>2026-11-02T02:59:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-screw-bisection-of-a-cone/sssssbab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-screw-bisection-of-a-cone/sssssbab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-screw-bisection-of-a-cone/sssssbab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-screw-bisection-of-a-cone/sssssbab"/>
      <lastmod>2026-11-02T02:59:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cygnus-geometry-demo/sssssba3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cygnus-geometry-demo/sssssba3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cygnus-geometry-demo/sssssba3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cygnus-geometry-demo/sssssba3"/>
      <lastmod>2026-11-01T20:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cygnus-geometry-demo/sssssba3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cygnus-geometry-demo/sssssba3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cygnus-geometry-demo/sssssba3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cygnus-geometry-demo/sssssba3"/>
      <lastmod>2026-11-01T20:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-volume/sssssbaq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-volume/sssssbaq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-volume/sssssbaq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-volume/sssssbaq"/>
      <lastmod>2026-11-02T18:17:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-volume/sssssbaq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-volume/sssssbaq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-volume/sssssbaq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-volume/sssssbaq"/>
      <lastmod>2026-11-02T18:17:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/seesaw-model/sssssba1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/seesaw-model/sssssba1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/seesaw-model/sssssba1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/seesaw-model/sssssba1"/>
      <lastmod>2026-11-01T21:08:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/seesaw-model/sssssba1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/seesaw-model/sssssba1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/seesaw-model/sssssba1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/seesaw-model/sssssba1"/>
      <lastmod>2026-11-01T21:08:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identifying-trig-ratios-practice/sssssbam</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-trig-ratios-practice/sssssbam"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-trig-ratios-practice/sssssbam"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-trig-ratios-practice/sssssbam"/>
      <lastmod>2026-11-02T07:03:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identifying-trig-ratios-practice/sssssbam</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-trig-ratios-practice/sssssbam"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-trig-ratios-practice/sssssbam"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-trig-ratios-practice/sssssbam"/>
      <lastmod>2026-11-02T07:03:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-wendy-sanchez/sssssbaj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-wendy-sanchez/sssssbaj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-wendy-sanchez/sssssbaj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-wendy-sanchez/sssssbaj"/>
      <lastmod>2026-11-02T18:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-wendy-sanchez/sssssbaj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-wendy-sanchez/sssssbaj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-wendy-sanchez/sssssbaj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-wendy-sanchez/sssssbaj"/>
      <lastmod>2026-11-02T18:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-interpretation-of-cross-product/sssssbap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-cross-product/sssssbap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-interpretation-of-cross-product/sssssbap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-cross-product/sssssbap"/>
      <lastmod>2026-11-01T19:36:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-interpretation-of-cross-product/sssssbap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-cross-product/sssssbap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-interpretation-of-cross-product/sssssbap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-cross-product/sssssbap"/>
      <lastmod>2026-11-01T19:36:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-function-and-geometric-construction/sssssbaw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-and-geometric-construction/sssssbaw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-and-geometric-construction/sssssbaw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-and-geometric-construction/sssssbaw"/>
      <lastmod>2026-11-02T00:39:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-function-and-geometric-construction/sssssbaw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-and-geometric-construction/sssssbaw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-and-geometric-construction/sssssbaw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-and-geometric-construction/sssssbaw"/>
      <lastmod>2026-11-02T00:39:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gogeometry-action-47-dynamic-parallelogram-exploration/sssssba6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-47-dynamic-parallelogram-exploration/sssssba6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gogeometry-action-47-dynamic-parallelogram-exploration/sssssba6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gogeometry-action-47-dynamic-parallelogram-exploration/sssssba6"/>
      <lastmod>2026-11-02T17:02:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gogeometry-action-47-dynamic-parallelogram-exploration/sssssba6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-47-dynamic-parallelogram-exploration/sssssba6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gogeometry-action-47-dynamic-parallelogram-exploration/sssssba6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gogeometry-action-47-dynamic-parallelogram-exploration/sssssba6"/>
      <lastmod>2026-11-02T17:02:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/5-2-practice-graphing-linear-equations-in-standard-form/sssssbag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/5-2-practice-graphing-linear-equations-in-standard-form/sssssbag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/5-2-practice-graphing-linear-equations-in-standard-form/sssssbag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/5-2-practice-graphing-linear-equations-in-standard-form/sssssbag"/>
      <lastmod>2026-11-01T20:53:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/5-2-practice-graphing-linear-equations-in-standard-form/sssssbag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/5-2-practice-graphing-linear-equations-in-standard-form/sssssbag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/5-2-practice-graphing-linear-equations-in-standard-form/sssssbag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/5-2-practice-graphing-linear-equations-in-standard-form/sssssbag"/>
      <lastmod>2026-11-01T20:53:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mccall-circle-constructions-geometry-and-tangent-properties/sssssba9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mccall-circle-constructions-geometry-and-tangent-properties/sssssba9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mccall-circle-constructions-geometry-and-tangent-properties/sssssba9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mccall-circle-constructions-geometry-and-tangent-properties/sssssba9"/>
      <lastmod>2026-11-02T18:42:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mccall-circle-constructions-geometry-and-tangent-properties/sssssba9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mccall-circle-constructions-geometry-and-tangent-properties/sssssba9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mccall-circle-constructions-geometry-and-tangent-properties/sssssba9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mccall-circle-constructions-geometry-and-tangent-properties/sssssba9"/>
      <lastmod>2026-11-02T18:42:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-segment-partitioning-level-1/sssssbae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-partitioning-level-1/sssssbae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-partitioning-level-1/sssssbae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-partitioning-level-1/sssssbae"/>
      <lastmod>2026-11-02T09:40:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-segment-partitioning-level-1/sssssbae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-partitioning-level-1/sssssbae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-partitioning-level-1/sssssbae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-partitioning-level-1/sssssbae"/>
      <lastmod>2026-11-02T09:40:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pattern-blocks-template/sssssbav</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pattern-blocks-template/sssssbav"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pattern-blocks-template/sssssbav"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pattern-blocks-template/sssssbav"/>
      <lastmod>2026-11-01T23:31:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pattern-blocks-template/sssssbav</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pattern-blocks-template/sssssbav"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pattern-blocks-template/sssssbav"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pattern-blocks-template/sssssbav"/>
      <lastmod>2026-11-01T23:31:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-creating-bar-graphs/sssssba4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-creating-bar-graphs/sssssba4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-creating-bar-graphs/sssssba4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-creating-bar-graphs/sssssba4"/>
      <lastmod>2026-11-01T19:24:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-creating-bar-graphs/sssssba4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-creating-bar-graphs/sssssba4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-creating-bar-graphs/sssssba4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-creating-bar-graphs/sssssba4"/>
      <lastmod>2026-11-01T19:24:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-pyramids-method-2/sssssbal</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-pyramids-method-2/sssssbal"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-pyramids-method-2/sssssbal"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-pyramids-method-2/sssssbal"/>
      <lastmod>2026-11-01T21:39:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-pyramids-method-2/sssssbal</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-pyramids-method-2/sssssbal"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-pyramids-method-2/sssssbal"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-pyramids-method-2/sssssbal"/>
      <lastmod>2026-11-01T21:39:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-total-surface-area-calculator-and-net/sssssbay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-total-surface-area-calculator-and-net/sssssbay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-total-surface-area-calculator-and-net/sssssbay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-total-surface-area-calculator-and-net/sssssbay"/>
      <lastmod>2026-11-01T19:10:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-total-surface-area-calculator-and-net/sssssbay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-total-surface-area-calculator-and-net/sssssbay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-total-surface-area-calculator-and-net/sssssbay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-total-surface-area-calculator-and-net/sssssbay"/>
      <lastmod>2026-11-01T19:10:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-and-similarity/sssssbaa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-similarity/sssssbaa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-similarity/sssssbaa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-similarity/sssssbaa"/>
      <lastmod>2026-11-01T21:32:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-and-similarity/sssssbaa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-similarity/sssssbaa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-similarity/sssssbaa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-similarity/sssssbaa"/>
      <lastmod>2026-11-01T21:32:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-sum-approximating-area-under-a-curve-with-rectangles/sssssbac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sum-approximating-area-under-a-curve-with-rectangles/sssssbac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sum-approximating-area-under-a-curve-with-rectangles/sssssbac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sum-approximating-area-under-a-curve-with-rectangles/sssssbac"/>
      <lastmod>2026-11-01T21:40:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-sum-approximating-area-under-a-curve-with-rectangles/sssssbac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sum-approximating-area-under-a-curve-with-rectangles/sssssbac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sum-approximating-area-under-a-curve-with-rectangles/sssssbac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sum-approximating-area-under-a-curve-with-rectangles/sssssbac"/>
      <lastmod>2026-11-01T21:40:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lawson-klein-bottle/sssssbar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lawson-klein-bottle/sssssbar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lawson-klein-bottle/sssssbar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lawson-klein-bottle/sssssbar"/>
      <lastmod>2026-11-02T07:29:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lawson-klein-bottle/sssssbar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lawson-klein-bottle/sssssbar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lawson-klein-bottle/sssssbar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lawson-klein-bottle/sssssbar"/>
      <lastmod>2026-11-02T07:29:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-with-regular-polygons/sssssbah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-with-regular-polygons/sssssbah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-with-regular-polygons/sssssbah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-with-regular-polygons/sssssbah"/>
      <lastmod>2026-11-01T19:30:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-with-regular-polygons/sssssbah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-with-regular-polygons/sssssbah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-with-regular-polygons/sssssbah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-with-regular-polygons/sssssbah"/>
      <lastmod>2026-11-01T19:30:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-construction-and-volume-calculation/sssssbat</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-volume-calculation/sssssbat"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-and-volume-calculation/sssssbat"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-volume-calculation/sssssbat"/>
      <lastmod>2026-11-01T20:46:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-construction-and-volume-calculation/sssssbat</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-volume-calculation/sssssbat"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-and-volume-calculation/sssssbat"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-volume-calculation/sssssbat"/>
      <lastmod>2026-11-01T20:46:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fermat-point-triangle/sssssbax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fermat-point-triangle/sssssbax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fermat-point-triangle/sssssbax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fermat-point-triangle/sssssbax"/>
      <lastmod>2026-11-02T12:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fermat-point-triangle/sssssbax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fermat-point-triangle/sssssbax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fermat-point-triangle/sssssbax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fermat-point-triangle/sssssbax"/>
      <lastmod>2026-11-02T12:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-graphics-view-in-geogebra/sssssbai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-graphics-view-in-geogebra/sssssbai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-graphics-view-in-geogebra/sssssbai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-graphics-view-in-geogebra/sssssbai"/>
      <lastmod>2026-11-01T21:57:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-graphics-view-in-geogebra/sssssbai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-graphics-view-in-geogebra/sssssbai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-graphics-view-in-geogebra/sssssbai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-graphics-view-in-geogebra/sssssbai"/>
      <lastmod>2026-11-01T21:57:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cumulative-frequency-distributions/sssssbao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cumulative-frequency-distributions/sssssbao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cumulative-frequency-distributions/sssssbao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cumulative-frequency-distributions/sssssbao"/>
      <lastmod>2026-11-01T19:02:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cumulative-frequency-distributions/sssssbao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cumulative-frequency-distributions/sssssbao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cumulative-frequency-distributions/sssssbao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cumulative-frequency-distributions/sssssbao"/>
      <lastmod>2026-11-01T19:02:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partners-to-nine/sssssbcs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partners-to-nine/sssssbcs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partners-to-nine/sssssbcs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partners-to-nine/sssssbcs"/>
      <lastmod>2026-11-01T20:51:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partners-to-nine/sssssbcs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partners-to-nine/sssssbcs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partners-to-nine/sssssbcs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partners-to-nine/sssssbcs"/>
      <lastmod>2026-11-01T20:51:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/total-area-calculation/sssssbc7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/total-area-calculation/sssssbc7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/total-area-calculation/sssssbc7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/total-area-calculation/sssssbc7"/>
      <lastmod>2026-11-01T23:48:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/total-area-calculation/sssssbc7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/total-area-calculation/sssssbc7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/total-area-calculation/sssssbc7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/total-area-calculation/sssssbc7"/>
      <lastmod>2026-11-01T23:48:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph-by-mario/sssssbcn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph-by-mario/sssssbcn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-cosine-graph-by-mario/sssssbcn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph-by-mario/sssssbcn"/>
      <lastmod>2026-11-02T16:58:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-cosine-graph-by-mario/sssssbcn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph-by-mario/sssssbcn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-cosine-graph-by-mario/sssssbcn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph-by-mario/sssssbcn"/>
      <lastmod>2026-11-02T16:58:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-limit-demonstration/sssssbc2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-limit-demonstration/sssssbc2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-limit-demonstration/sssssbc2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-limit-demonstration/sssssbc2"/>
      <lastmod>2026-11-02T18:24:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-limit-demonstration/sssssbc2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-limit-demonstration/sssssbc2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-limit-demonstration/sssssbc2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-limit-demonstration/sssssbc2"/>
      <lastmod>2026-11-02T18:24:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bee-confidence-interval-given-m-e-sample-size/sssssbck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bee-confidence-interval-given-m-e-sample-size/sssssbck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bee-confidence-interval-given-m-e-sample-size/sssssbck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bee-confidence-interval-given-m-e-sample-size/sssssbck"/>
      <lastmod>2026-11-02T18:06:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bee-confidence-interval-given-m-e-sample-size/sssssbck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bee-confidence-interval-given-m-e-sample-size/sssssbck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bee-confidence-interval-given-m-e-sample-size/sssssbck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bee-confidence-interval-given-m-e-sample-size/sssssbck"/>
      <lastmod>2026-11-02T18:06:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gogeometry-action-93-dynamic-geometry-problem/sssssbcz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-93-dynamic-geometry-problem/sssssbcz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gogeometry-action-93-dynamic-geometry-problem/sssssbcz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gogeometry-action-93-dynamic-geometry-problem/sssssbcz"/>
      <lastmod>2026-11-02T18:45:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gogeometry-action-93-dynamic-geometry-problem/sssssbcz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-93-dynamic-geometry-problem/sssssbcz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gogeometry-action-93-dynamic-geometry-problem/sssssbcz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gogeometry-action-93-dynamic-geometry-problem/sssssbcz"/>
      <lastmod>2026-11-02T18:45:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chapter-3-constructions-assessment-rhombus-and-riemann-sums/sssssbc0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chapter-3-constructions-assessment-rhombus-and-riemann-sums/sssssbc0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chapter-3-constructions-assessment-rhombus-and-riemann-sums/sssssbc0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chapter-3-constructions-assessment-rhombus-and-riemann-sums/sssssbc0"/>
      <lastmod>2026-11-01T21:20:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chapter-3-constructions-assessment-rhombus-and-riemann-sums/sssssbc0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chapter-3-constructions-assessment-rhombus-and-riemann-sums/sssssbc0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chapter-3-constructions-assessment-rhombus-and-riemann-sums/sssssbc0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chapter-3-constructions-assessment-rhombus-and-riemann-sums/sssssbc0"/>
      <lastmod>2026-11-01T21:20:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruence-of-triangles-sss/sssssbcd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-of-triangles-sss/sssssbcd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-of-triangles-sss/sssssbcd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-of-triangles-sss/sssssbcd"/>
      <lastmod>2026-11-02T18:26:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruence-of-triangles-sss/sssssbcd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-of-triangles-sss/sssssbcd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-of-triangles-sss/sssssbcd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-of-triangles-sss/sssssbcd"/>
      <lastmod>2026-11-02T18:26:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-and-exploring-a-triangular-prism/sssssbcf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-and-exploring-a-triangular-prism/sssssbcf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-and-exploring-a-triangular-prism/sssssbcf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-and-exploring-a-triangular-prism/sssssbcf"/>
      <lastmod>2026-11-01T22:01:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-and-exploring-a-triangular-prism/sssssbcf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-and-exploring-a-triangular-prism/sssssbcf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-and-exploring-a-triangular-prism/sssssbcf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-and-exploring-a-triangular-prism/sssssbcf"/>
      <lastmod>2026-11-01T22:01:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-subtraction-demonstration/sssssbc8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-demonstration/sssssbc8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-demonstration/sssssbc8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-demonstration/sssssbc8"/>
      <lastmod>2026-11-02T16:34:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-subtraction-demonstration/sssssbc8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-demonstration/sssssbc8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-demonstration/sssssbc8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-demonstration/sssssbc8"/>
      <lastmod>2026-11-02T16:34:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-construct-an-angle-bisector/sssssbcu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-construct-an-angle-bisector/sssssbcu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-construct-an-angle-bisector/sssssbcu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-construct-an-angle-bisector/sssssbcu"/>
      <lastmod>2026-11-01T21:14:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-construct-an-angle-bisector/sssssbcu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-construct-an-angle-bisector/sssssbcu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-construct-an-angle-bisector/sssssbcu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-construct-an-angle-bisector/sssssbcu"/>
      <lastmod>2026-11-01T21:14:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modulus-of-continuity-demonstration/sssssbc5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modulus-of-continuity-demonstration/sssssbc5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modulus-of-continuity-demonstration/sssssbc5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modulus-of-continuity-demonstration/sssssbc5"/>
      <lastmod>2026-11-01T23:48:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modulus-of-continuity-demonstration/sssssbc5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modulus-of-continuity-demonstration/sssssbc5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modulus-of-continuity-demonstration/sssssbc5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modulus-of-continuity-demonstration/sssssbc5"/>
      <lastmod>2026-11-01T23:48:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ford-circles/sssssbcb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ford-circles/sssssbcb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ford-circles/sssssbcb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ford-circles/sssssbcb"/>
      <lastmod>2026-11-02T09:36:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ford-circles/sssssbcb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ford-circles/sssssbcb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ford-circles/sssssbcb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ford-circles/sssssbcb"/>
      <lastmod>2026-11-02T09:36:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-angle-addition-postulate/sssssbc3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-angle-addition-postulate/sssssbc3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-angle-addition-postulate/sssssbc3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-angle-addition-postulate/sssssbc3"/>
      <lastmod>2026-11-02T00:31:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-angle-addition-postulate/sssssbc3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-angle-addition-postulate/sssssbc3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-angle-addition-postulate/sssssbc3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-angle-addition-postulate/sssssbc3"/>
      <lastmod>2026-11-02T00:31:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-dimensional-elastic-collisions/sssssbcq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-dimensional-elastic-collisions/sssssbcq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-dimensional-elastic-collisions/sssssbcq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-dimensional-elastic-collisions/sssssbcq"/>
      <lastmod>2026-11-02T15:17:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-dimensional-elastic-collisions/sssssbcq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-dimensional-elastic-collisions/sssssbcq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-dimensional-elastic-collisions/sssssbcq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-dimensional-elastic-collisions/sssssbcq"/>
      <lastmod>2026-11-02T15:17:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-parallelogram-by-ms-muusse/sssssbc1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-by-ms-muusse/sssssbc1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-parallelogram-by-ms-muusse/sssssbc1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-by-ms-muusse/sssssbc1"/>
      <lastmod>2026-11-02T08:40:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-parallelogram-by-ms-muusse/sssssbc1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-by-ms-muusse/sssssbc1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-parallelogram-by-ms-muusse/sssssbc1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-by-ms-muusse/sssssbc1"/>
      <lastmod>2026-11-02T08:40:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-example-exploring-right-triangles-and-volume/sssssbcm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-exploring-right-triangles-and-volume/sssssbcm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-exploring-right-triangles-and-volume/sssssbcm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-exploring-right-triangles-and-volume/sssssbcm"/>
      <lastmod>2026-11-02T00:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-example-exploring-right-triangles-and-volume/sssssbcm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-exploring-right-triangles-and-volume/sssssbcm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-exploring-right-triangles-and-volume/sssssbcm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-exploring-right-triangles-and-volume/sssssbcm"/>
      <lastmod>2026-11-02T00:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/example-of-complex-number-multiplication-2/sssssbcj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-of-complex-number-multiplication-2/sssssbcj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-of-complex-number-multiplication-2/sssssbcj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-of-complex-number-multiplication-2/sssssbcj"/>
      <lastmod>2026-11-01T23:34:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/example-of-complex-number-multiplication-2/sssssbcj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-of-complex-number-multiplication-2/sssssbcj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-of-complex-number-multiplication-2/sssssbcj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-of-complex-number-multiplication-2/sssssbcj"/>
      <lastmod>2026-11-01T23:34:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-proof-of-multiplying-complex-numbers-in-polar-form/sssssbcp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-proof-of-multiplying-complex-numbers-in-polar-form/sssssbcp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-proof-of-multiplying-complex-numbers-in-polar-form/sssssbcp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-proof-of-multiplying-complex-numbers-in-polar-form/sssssbcp"/>
      <lastmod>2026-11-02T13:39:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-proof-of-multiplying-complex-numbers-in-polar-form/sssssbcp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-proof-of-multiplying-complex-numbers-in-polar-form/sssssbcp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-proof-of-multiplying-complex-numbers-in-polar-form/sssssbcp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-proof-of-multiplying-complex-numbers-in-polar-form/sssssbcp"/>
      <lastmod>2026-11-02T13:39:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotations-reflections-and-dilations/sssssbcw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-reflections-and-dilations/sssssbcw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-reflections-and-dilations/sssssbcw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-reflections-and-dilations/sssssbcw"/>
      <lastmod>2026-11-02T13:16:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotations-reflections-and-dilations/sssssbcw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-reflections-and-dilations/sssssbcw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-reflections-and-dilations/sssssbcw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-reflections-and-dilations/sssssbcw"/>
      <lastmod>2026-11-02T13:16:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/division-problems/sssssbc6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-problems/sssssbc6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-problems/sssssbc6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-problems/sssssbc6"/>
      <lastmod>2026-11-02T15:02:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/division-problems/sssssbc6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-problems/sssssbc6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-problems/sssssbc6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-problems/sssssbc6"/>
      <lastmod>2026-11-02T15:02:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/side-length-quotients-in-similar-triangles/sssssbcg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/side-length-quotients-in-similar-triangles/sssssbcg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/side-length-quotients-in-similar-triangles/sssssbcg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/side-length-quotients-in-similar-triangles/sssssbcg"/>
      <lastmod>2026-11-02T18:51:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/side-length-quotients-in-similar-triangles/sssssbcg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/side-length-quotients-in-similar-triangles/sssssbcg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/side-length-quotients-in-similar-triangles/sssssbcg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/side-length-quotients-in-similar-triangles/sssssbcg"/>
      <lastmod>2026-11-02T18:51:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-two-normal-curves-with-0-5/sssssbc9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-two-normal-curves-with-0-5/sssssbc9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-two-normal-curves-with-0-5/sssssbc9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-two-normal-curves-with-0-5/sssssbc9"/>
      <lastmod>2026-11-02T13:15:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-two-normal-curves-with-0-5/sssssbc9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-two-normal-curves-with-0-5/sssssbc9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-two-normal-curves-with-0-5/sssssbc9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-two-normal-curves-with-0-5/sssssbc9"/>
      <lastmod>2026-11-02T13:15:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-addition-visualized-vector-translation-and-parallelogram-rule/sssssbce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-addition-visualized-vector-translation-and-parallelogram-rule/sssssbce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-addition-visualized-vector-translation-and-parallelogram-rule/sssssbce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-addition-visualized-vector-translation-and-parallelogram-rule/sssssbce"/>
      <lastmod>2026-11-02T03:10:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-addition-visualized-vector-translation-and-parallelogram-rule/sssssbce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-addition-visualized-vector-translation-and-parallelogram-rule/sssssbce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-addition-visualized-vector-translation-and-parallelogram-rule/sssssbce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-addition-visualized-vector-translation-and-parallelogram-rule/sssssbce"/>
      <lastmod>2026-11-02T03:10:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-and-edge-rotation/sssssbcv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-edge-rotation/sssssbcv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-edge-rotation/sssssbcv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-edge-rotation/sssssbcv"/>
      <lastmod>2026-11-02T11:47:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-and-edge-rotation/sssssbcv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-edge-rotation/sssssbcv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-edge-rotation/sssssbcv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-edge-rotation/sssssbcv"/>
      <lastmod>2026-11-02T11:47:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-problem-constructing-and-exploring-scaled-polygons/sssssbc4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-problem-constructing-and-exploring-scaled-polygons/sssssbc4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-problem-constructing-and-exploring-scaled-polygons/sssssbc4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-problem-constructing-and-exploring-scaled-polygons/sssssbc4"/>
      <lastmod>2026-11-01T19:06:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-problem-constructing-and-exploring-scaled-polygons/sssssbc4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-problem-constructing-and-exploring-scaled-polygons/sssssbc4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-problem-constructing-and-exploring-scaled-polygons/sssssbc4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-problem-constructing-and-exploring-scaled-polygons/sssssbc4"/>
      <lastmod>2026-11-01T19:06:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/supertorus/sssssbcl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/supertorus/sssssbcl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/supertorus/sssssbcl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/supertorus/sssssbcl"/>
      <lastmod>2026-11-02T02:53:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/supertorus/sssssbcl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/supertorus/sssssbcl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/supertorus/sssssbcl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/supertorus/sssssbcl"/>
      <lastmod>2026-11-02T02:53:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-addition-postulate-practice/sssssbcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-practice/sssssbcy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-addition-postulate-practice/sssssbcy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-practice/sssssbcy"/>
      <lastmod>2026-11-01T19:28:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-addition-postulate-practice/sssssbcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-practice/sssssbcy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-addition-postulate-practice/sssssbcy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-practice/sssssbcy"/>
      <lastmod>2026-11-01T19:28:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-the-incenter-of-horry-county/sssssbca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-incenter-of-horry-county/sssssbca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-incenter-of-horry-county/sssssbca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-incenter-of-horry-county/sssssbca"/>
      <lastmod>2026-11-02T18:23:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-the-incenter-of-horry-county/sssssbca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-incenter-of-horry-county/sssssbca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-incenter-of-horry-county/sssssbca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-incenter-of-horry-county/sssssbca"/>
      <lastmod>2026-11-02T18:23:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-screw-bisection-of-a-sphere-v2/sssssbcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-screw-bisection-of-a-sphere-v2/sssssbcc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-screw-bisection-of-a-sphere-v2/sssssbcc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-screw-bisection-of-a-sphere-v2/sssssbcc"/>
      <lastmod>2026-11-01T23:54:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-screw-bisection-of-a-sphere-v2/sssssbcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-screw-bisection-of-a-sphere-v2/sssssbcc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-screw-bisection-of-a-sphere-v2/sssssbcc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-screw-bisection-of-a-sphere-v2/sssssbcc"/>
      <lastmod>2026-11-01T23:54:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/math-problem-on-the-move-8/sssssbcr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-problem-on-the-move-8/sssssbcr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-problem-on-the-move-8/sssssbcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-problem-on-the-move-8/sssssbcr"/>
      <lastmod>2026-11-01T20:53:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/math-problem-on-the-move-8/sssssbcr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-problem-on-the-move-8/sssssbcr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-problem-on-the-move-8/sssssbcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-problem-on-the-move-8/sssssbcr"/>
      <lastmod>2026-11-01T20:53:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-transformations-translations/sssssbch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-transformations-translations/sssssbch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-transformations-translations/sssssbch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-transformations-translations/sssssbch"/>
      <lastmod>2026-11-02T11:51:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-transformations-translations/sssssbch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-transformations-translations/sssssbch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-transformations-translations/sssssbch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-transformations-translations/sssssbch"/>
      <lastmod>2026-11-02T11:51:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolic-triangle/sssssbct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-triangle/sssssbct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-triangle/sssssbct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-triangle/sssssbct"/>
      <lastmod>2026-11-02T17:42:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabolic-triangle/sssssbct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-triangle/sssssbct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-triangle/sssssbct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-triangle/sssssbct"/>
      <lastmod>2026-11-02T17:42:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponents-game-level-4/sssssbcx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-game-level-4/sssssbcx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-game-level-4/sssssbcx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-game-level-4/sssssbcx"/>
      <lastmod>2026-11-01T21:36:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponents-game-level-4/sssssbcx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-game-level-4/sssssbcx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-game-level-4/sssssbcx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-game-level-4/sssssbcx"/>
      <lastmod>2026-11-01T21:36:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-compass-and-straightedge-trisection/sssssbci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-compass-and-straightedge-trisection/sssssbci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-compass-and-straightedge-trisection/sssssbci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-compass-and-straightedge-trisection/sssssbci"/>
      <lastmod>2026-11-02T03:19:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-compass-and-straightedge-trisection/sssssbci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-compass-and-straightedge-trisection/sssssbci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-compass-and-straightedge-trisection/sssssbci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-compass-and-straightedge-trisection/sssssbci"/>
      <lastmod>2026-11-02T03:19:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-two-planes-by-daniel-proctor/sssssbco</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-planes-by-daniel-proctor/sssssbco"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-planes-by-daniel-proctor/sssssbco"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-planes-by-daniel-proctor/sssssbco"/>
      <lastmod>2026-11-01T22:06:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-two-planes-by-daniel-proctor/sssssbco</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-planes-by-daniel-proctor/sssssbco"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-planes-by-daniel-proctor/sssssbco"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-planes-by-daniel-proctor/sssssbco"/>
      <lastmod>2026-11-01T22:06:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-michelle/sssssbrs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-michelle/sssssbrs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-demonstration-by-michelle/sssssbrs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-michelle/sssssbrs"/>
      <lastmod>2026-11-02T11:45:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-demonstration-by-michelle/sssssbrs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-michelle/sssssbrs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-demonstration-by-michelle/sssssbrs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-michelle/sssssbrs"/>
      <lastmod>2026-11-02T11:45:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/approximating-pi-using-s-ramanujan-s-method/sssssbr7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-pi-using-s-ramanujan-s-method/sssssbr7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-pi-using-s-ramanujan-s-method/sssssbr7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-pi-using-s-ramanujan-s-method/sssssbr7"/>
      <lastmod>2026-11-01T19:29:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/approximating-pi-using-s-ramanujan-s-method/sssssbr7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-pi-using-s-ramanujan-s-method/sssssbr7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-pi-using-s-ramanujan-s-method/sssssbr7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-pi-using-s-ramanujan-s-method/sssssbr7"/>
      <lastmod>2026-11-01T19:29:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-demo-of-angle-types/sssssbrn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-demo-of-angle-types/sssssbrn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-demo-of-angle-types/sssssbrn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-demo-of-angle-types/sssssbrn"/>
      <lastmod>2026-11-02T15:49:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-demo-of-angle-types/sssssbrn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-demo-of-angle-types/sssssbrn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-demo-of-angle-types/sssssbrn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-demo-of-angle-types/sssssbrn"/>
      <lastmod>2026-11-02T15:49:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/secant-to-tangent-and-derivative-trace/sssssbr2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/secant-to-tangent-and-derivative-trace/sssssbr2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/secant-to-tangent-and-derivative-trace/sssssbr2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/secant-to-tangent-and-derivative-trace/sssssbr2"/>
      <lastmod>2026-11-01T21:28:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/secant-to-tangent-and-derivative-trace/sssssbr2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/secant-to-tangent-and-derivative-trace/sssssbr2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/secant-to-tangent-and-derivative-trace/sssssbr2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/secant-to-tangent-and-derivative-trace/sssssbr2"/>
      <lastmod>2026-11-01T21:28:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-surface-of-rotation-around-x-axis/sssssbrk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-surface-of-rotation-around-x-axis/sssssbrk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-surface-of-rotation-around-x-axis/sssssbrk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-surface-of-rotation-around-x-axis/sssssbrk"/>
      <lastmod>2026-11-02T18:37:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-surface-of-rotation-around-x-axis/sssssbrk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-surface-of-rotation-around-x-axis/sssssbrk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-surface-of-rotation-around-x-axis/sssssbrk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-surface-of-rotation-around-x-axis/sssssbrk"/>
      <lastmod>2026-11-02T18:37:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trisecting-a-cube-into-three-pyramids-by-anthony-or/sssssbrz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trisecting-a-cube-into-three-pyramids-by-anthony-or/sssssbrz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trisecting-a-cube-into-three-pyramids-by-anthony-or/sssssbrz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trisecting-a-cube-into-three-pyramids-by-anthony-or/sssssbrz"/>
      <lastmod>2026-11-02T17:46:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trisecting-a-cube-into-three-pyramids-by-anthony-or/sssssbrz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trisecting-a-cube-into-three-pyramids-by-anthony-or/sssssbrz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trisecting-a-cube-into-three-pyramids-by-anthony-or/sssssbrz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trisecting-a-cube-into-three-pyramids-by-anthony-or/sssssbrz"/>
      <lastmod>2026-11-02T17:46:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rainbow-snake-with-attractor/sssssbr0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-snake-with-attractor/sssssbr0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-snake-with-attractor/sssssbr0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-snake-with-attractor/sssssbr0"/>
      <lastmod>2026-11-01T21:17:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rainbow-snake-with-attractor/sssssbr0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-snake-with-attractor/sssssbr0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-snake-with-attractor/sssssbr0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-snake-with-attractor/sssssbr0"/>
      <lastmod>2026-11-01T21:17:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-neha-saraf-2/sssssbrd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-neha-saraf-2/sssssbrd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-neha-saraf-2/sssssbrd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-neha-saraf-2/sssssbrd"/>
      <lastmod>2026-11-02T18:41:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-neha-saraf-2/sssssbrd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-neha-saraf-2/sssssbrd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-neha-saraf-2/sssssbrd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-neha-saraf-2/sssssbrd"/>
      <lastmod>2026-11-02T18:41:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-triangles-practice-part-2/sssssbrf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-triangles-practice-part-2/sssssbrf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-triangles-practice-part-2/sssssbrf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-triangles-practice-part-2/sssssbrf"/>
      <lastmod>2026-11-01T22:52:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-triangles-practice-part-2/sssssbrf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-triangles-practice-part-2/sssssbrf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-triangles-practice-part-2/sssssbrf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-triangles-practice-part-2/sssssbrf"/>
      <lastmod>2026-11-01T22:52:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-cross-sections-perpendicular-to-x-axis/sssssbr8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-cross-sections-perpendicular-to-x-axis/sssssbr8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-cross-sections-perpendicular-to-x-axis/sssssbr8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-cross-sections-perpendicular-to-x-axis/sssssbr8"/>
      <lastmod>2026-11-01T20:53:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-cross-sections-perpendicular-to-x-axis/sssssbr8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-cross-sections-perpendicular-to-x-axis/sssssbr8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-cross-sections-perpendicular-to-x-axis/sssssbr8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-cross-sections-perpendicular-to-x-axis/sssssbr8"/>
      <lastmod>2026-11-01T20:53:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-wes-dunnavant/sssssbru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-wes-dunnavant/sssssbru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-wes-dunnavant/sssssbru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-wes-dunnavant/sssssbru"/>
      <lastmod>2026-11-02T18:10:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-wes-dunnavant/sssssbru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-wes-dunnavant/sssssbru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-wes-dunnavant/sssssbru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-wes-dunnavant/sssssbru"/>
      <lastmod>2026-11-02T18:10:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-magnitude/sssssbr5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-magnitude/sssssbr5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-magnitude/sssssbr5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-magnitude/sssssbr5"/>
      <lastmod>2026-11-02T18:10:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-magnitude/sssssbr5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-magnitude/sssssbr5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-magnitude/sssssbr5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-magnitude/sssssbr5"/>
      <lastmod>2026-11-02T18:10:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-in-similar-triangles/sssssbrb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-in-similar-triangles/sssssbrb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-in-similar-triangles/sssssbrb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-in-similar-triangles/sssssbrb"/>
      <lastmod>2026-11-01T20:59:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-in-similar-triangles/sssssbrb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-in-similar-triangles/sssssbrb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-in-similar-triangles/sssssbrb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-in-similar-triangles/sssssbrb"/>
      <lastmod>2026-11-01T20:59:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-construction-by-alyssarkoch/sssssbr3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-alyssarkoch/sssssbr3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-by-alyssarkoch/sssssbr3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-alyssarkoch/sssssbr3"/>
      <lastmod>2026-11-02T12:24:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-construction-by-alyssarkoch/sssssbr3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-alyssarkoch/sssssbr3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-by-alyssarkoch/sssssbr3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-alyssarkoch/sssssbr3"/>
      <lastmod>2026-11-02T12:24:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/resistance-to-outliers-demo/sssssbrq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/resistance-to-outliers-demo/sssssbrq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/resistance-to-outliers-demo/sssssbrq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/resistance-to-outliers-demo/sssssbrq"/>
      <lastmod>2026-11-02T17:01:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/resistance-to-outliers-demo/sssssbrq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/resistance-to-outliers-demo/sssssbrq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/resistance-to-outliers-demo/sssssbrq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/resistance-to-outliers-demo/sssssbrq"/>
      <lastmod>2026-11-02T17:01:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/further-estimating-roots-using-geogebra-s-root-command-to-explore-function-zero/sssssbr1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/further-estimating-roots-using-geogebra-s-root-command-to-explore-function-zero/sssssbr1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/further-estimating-roots-using-geogebra-s-root-command-to-explore-function-zero/sssssbr1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/further-estimating-roots-using-geogebra-s-root-command-to-explore-function-zero/sssssbr1"/>
      <lastmod>2026-11-02T18:46:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/further-estimating-roots-using-geogebra-s-root-command-to-explore-function-zero/sssssbr1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/further-estimating-roots-using-geogebra-s-root-command-to-explore-function-zero/sssssbr1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/further-estimating-roots-using-geogebra-s-root-command-to-explore-function-zero/sssssbr1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/further-estimating-roots-using-geogebra-s-root-command-to-explore-function-zero/sssssbr1"/>
      <lastmod>2026-11-02T18:46:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-project/sssssbrm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-project/sssssbrm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-project/sssssbrm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-project/sssssbrm"/>
      <lastmod>2026-11-02T18:03:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-project/sssssbrm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-project/sssssbrm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-project/sssssbrm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-project/sssssbrm"/>
      <lastmod>2026-11-02T18:03:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-vectors-i-j-k/sssssbrj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-vectors-i-j-k/sssssbrj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-vectors-i-j-k/sssssbrj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-vectors-i-j-k/sssssbrj"/>
      <lastmod>2026-11-02T00:10:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-vectors-i-j-k/sssssbrj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-vectors-i-j-k/sssssbrj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-vectors-i-j-k/sssssbrj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-vectors-i-j-k/sssssbrj"/>
      <lastmod>2026-11-02T00:10:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-lines-gradients/sssssbrp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-lines-gradients/sssssbrp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-lines-gradients/sssssbrp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-lines-gradients/sssssbrp"/>
      <lastmod>2026-11-02T16:51:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-lines-gradients/sssssbrp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-lines-gradients/sssssbrp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-lines-gradients/sssssbrp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-lines-gradients/sssssbrp"/>
      <lastmod>2026-11-02T16:51:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/n-gon-exterior-angles/sssssbrw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/n-gon-exterior-angles/sssssbrw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/n-gon-exterior-angles/sssssbrw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/n-gon-exterior-angles/sssssbrw"/>
      <lastmod>2026-11-02T00:54:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/n-gon-exterior-angles/sssssbrw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/n-gon-exterior-angles/sssssbrw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/n-gon-exterior-angles/sssssbrw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/n-gon-exterior-angles/sssssbrw"/>
      <lastmod>2026-11-02T00:54:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/year-12-basic-algebra-skills-test/sssssbr6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/year-12-basic-algebra-skills-test/sssssbr6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/year-12-basic-algebra-skills-test/sssssbr6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/year-12-basic-algebra-skills-test/sssssbr6"/>
      <lastmod>2026-11-01T21:43:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/year-12-basic-algebra-skills-test/sssssbr6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/year-12-basic-algebra-skills-test/sssssbr6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/year-12-basic-algebra-skills-test/sssssbr6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/year-12-basic-algebra-skills-test/sssssbr6"/>
      <lastmod>2026-11-01T21:43:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conformal-mapping-and-cosmatesque/sssssbrg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conformal-mapping-and-cosmatesque/sssssbrg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conformal-mapping-and-cosmatesque/sssssbrg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conformal-mapping-and-cosmatesque/sssssbrg"/>
      <lastmod>2026-11-01T21:05:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conformal-mapping-and-cosmatesque/sssssbrg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conformal-mapping-and-cosmatesque/sssssbrg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conformal-mapping-and-cosmatesque/sssssbrg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conformal-mapping-and-cosmatesque/sssssbrg"/>
      <lastmod>2026-11-01T21:05:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pie-fraction-creator-dynamic-sector-division-and-ratio-visualization/sssssbr9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pie-fraction-creator-dynamic-sector-division-and-ratio-visualization/sssssbr9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pie-fraction-creator-dynamic-sector-division-and-ratio-visualization/sssssbr9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pie-fraction-creator-dynamic-sector-division-and-ratio-visualization/sssssbr9"/>
      <lastmod>2026-11-02T16:50:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pie-fraction-creator-dynamic-sector-division-and-ratio-visualization/sssssbr9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pie-fraction-creator-dynamic-sector-division-and-ratio-visualization/sssssbr9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pie-fraction-creator-dynamic-sector-division-and-ratio-visualization/sssssbr9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pie-fraction-creator-dynamic-sector-division-and-ratio-visualization/sssssbr9"/>
      <lastmod>2026-11-02T16:50:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-5/sssssbre</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-5/sssssbre"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan-5/sssssbre"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-5/sssssbre"/>
      <lastmod>2026-11-02T17:58:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan-5/sssssbre</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-5/sssssbre"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan-5/sssssbre"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-5/sssssbre"/>
      <lastmod>2026-11-02T17:58:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-surface-area-using-riemann-integral/sssssbrv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-surface-area-using-riemann-integral/sssssbrv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-surface-area-using-riemann-integral/sssssbrv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-surface-area-using-riemann-integral/sssssbrv"/>
      <lastmod>2026-11-02T18:10:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-surface-area-using-riemann-integral/sssssbrv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-surface-area-using-riemann-integral/sssssbrv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-surface-area-using-riemann-integral/sssssbrv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-surface-area-using-riemann-integral/sssssbrv"/>
      <lastmod>2026-11-02T18:10:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decompose-a-spherical-polyhedron/sssssbr4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decompose-a-spherical-polyhedron/sssssbr4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decompose-a-spherical-polyhedron/sssssbr4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decompose-a-spherical-polyhedron/sssssbr4"/>
      <lastmod>2026-11-02T03:03:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decompose-a-spherical-polyhedron/sssssbr4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decompose-a-spherical-polyhedron/sssssbr4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decompose-a-spherical-polyhedron/sssssbr4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decompose-a-spherical-polyhedron/sssssbr4"/>
      <lastmod>2026-11-02T03:03:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-area-of-a-circle-by-geogebra-classroom-activities-2/sssssbrl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-area-of-a-circle-by-geogebra-classroom-activities-2/sssssbrl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-area-of-a-circle-by-geogebra-classroom-activities-2/sssssbrl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-area-of-a-circle-by-geogebra-classroom-activities-2/sssssbrl"/>
      <lastmod>2026-11-02T10:38:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-area-of-a-circle-by-geogebra-classroom-activities-2/sssssbrl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-area-of-a-circle-by-geogebra-classroom-activities-2/sssssbrl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-area-of-a-circle-by-geogebra-classroom-activities-2/sssssbrl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-area-of-a-circle-by-geogebra-classroom-activities-2/sssssbrl"/>
      <lastmod>2026-11-02T10:38:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-based-pyramid-tent-3/sssssbry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-based-pyramid-tent-3/sssssbry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-based-pyramid-tent-3/sssssbry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-based-pyramid-tent-3/sssssbry"/>
      <lastmod>2026-11-02T17:18:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-based-pyramid-tent-3/sssssbry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-based-pyramid-tent-3/sssssbry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-based-pyramid-tent-3/sssssbry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-based-pyramid-tent-3/sssssbry"/>
      <lastmod>2026-11-02T17:18:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/when-pqrs-becomes-a-rhombus/sssssbra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/when-pqrs-becomes-a-rhombus/sssssbra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/when-pqrs-becomes-a-rhombus/sssssbra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/when-pqrs-becomes-a-rhombus/sssssbra"/>
      <lastmod>2026-11-02T11:43:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/when-pqrs-becomes-a-rhombus/sssssbra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/when-pqrs-becomes-a-rhombus/sssssbra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/when-pqrs-becomes-a-rhombus/sssssbra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/when-pqrs-becomes-a-rhombus/sssssbra"/>
      <lastmod>2026-11-02T11:43:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rational-number-addition-and-subtraction-practice/sssssbrc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-number-addition-and-subtraction-practice/sssssbrc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-number-addition-and-subtraction-practice/sssssbrc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-number-addition-and-subtraction-practice/sssssbrc"/>
      <lastmod>2026-11-01T23:35:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rational-number-addition-and-subtraction-practice/sssssbrc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-number-addition-and-subtraction-practice/sssssbrc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-number-addition-and-subtraction-practice/sssssbrc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-number-addition-and-subtraction-practice/sssssbrc"/>
      <lastmod>2026-11-01T23:35:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-nets/sssssbrr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-nets/sssssbrr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-nets/sssssbrr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-nets/sssssbrr"/>
      <lastmod>2026-11-02T02:26:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-nets/sssssbrr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-nets/sssssbrr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-nets/sssssbrr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-nets/sssssbrr"/>
      <lastmod>2026-11-02T02:26:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/picard-s-method-of-successive-approximations/sssssbrh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/picard-s-method-of-successive-approximations/sssssbrh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/picard-s-method-of-successive-approximations/sssssbrh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/picard-s-method-of-successive-approximations/sssssbrh"/>
      <lastmod>2026-11-01T21:08:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/picard-s-method-of-successive-approximations/sssssbrh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/picard-s-method-of-successive-approximations/sssssbrh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/picard-s-method-of-successive-approximations/sssssbrh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/picard-s-method-of-successive-approximations/sssssbrh"/>
      <lastmod>2026-11-01T21:08:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mass-volume-and-density-word-problem/sssssbrt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mass-volume-and-density-word-problem/sssssbrt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mass-volume-and-density-word-problem/sssssbrt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mass-volume-and-density-word-problem/sssssbrt"/>
      <lastmod>2026-11-02T00:09:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mass-volume-and-density-word-problem/sssssbrt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mass-volume-and-density-word-problem/sssssbrt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mass-volume-and-density-word-problem/sssssbrt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mass-volume-and-density-word-problem/sssssbrt"/>
      <lastmod>2026-11-02T00:09:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/super-ellipsoid/sssssbrx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/super-ellipsoid/sssssbrx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/super-ellipsoid/sssssbrx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/super-ellipsoid/sssssbrx"/>
      <lastmod>2026-11-02T16:32:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/super-ellipsoid/sssssbrx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/super-ellipsoid/sssssbrx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/super-ellipsoid/sssssbrx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/super-ellipsoid/sssssbrx"/>
      <lastmod>2026-11-02T16:32:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wave-interference/sssssbri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-interference/sssssbri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-interference/sssssbri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-interference/sssssbri"/>
      <lastmod>2026-11-02T18:01:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wave-interference/sssssbri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-interference/sssssbri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-interference/sssssbri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-interference/sssssbri"/>
      <lastmod>2026-11-02T18:01:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-generated-by-region-between-2-curves/sssssbro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-generated-by-region-between-2-curves/sssssbro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-generated-by-region-between-2-curves/sssssbro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-generated-by-region-between-2-curves/sssssbro"/>
      <lastmod>2026-11-02T17:39:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-generated-by-region-between-2-curves/sssssbro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-generated-by-region-between-2-curves/sssssbro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-generated-by-region-between-2-curves/sssssbro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-generated-by-region-between-2-curves/sssssbro"/>
      <lastmod>2026-11-02T17:39:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-the-renault-logo/sssssbhs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-renault-logo/sssssbhs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-renault-logo/sssssbhs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-renault-logo/sssssbhs"/>
      <lastmod>2026-11-01T19:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-the-renault-logo/sssssbhs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-renault-logo/sssssbhs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-renault-logo/sssssbhs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-renault-logo/sssssbhs"/>
      <lastmod>2026-11-01T19:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-relationship-of-triangle-and-circumcenter/sssssbh7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-of-triangle-and-circumcenter/sssssbh7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-of-triangle-and-circumcenter/sssssbh7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-of-triangle-and-circumcenter/sssssbh7"/>
      <lastmod>2026-11-02T18:02:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-relationship-of-triangle-and-circumcenter/sssssbh7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-of-triangle-and-circumcenter/sssssbh7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-of-triangle-and-circumcenter/sssssbh7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-of-triangle-and-circumcenter/sssssbh7"/>
      <lastmod>2026-11-02T18:02:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/composite-surface-area-cube-and-prism-combination/sssssbhn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-surface-area-cube-and-prism-combination/sssssbhn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-surface-area-cube-and-prism-combination/sssssbhn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-surface-area-cube-and-prism-combination/sssssbhn"/>
      <lastmod>2026-11-02T16:44:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/composite-surface-area-cube-and-prism-combination/sssssbhn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-surface-area-cube-and-prism-combination/sssssbhn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-surface-area-cube-and-prism-combination/sssssbhn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-surface-area-cube-and-prism-combination/sssssbhn"/>
      <lastmod>2026-11-02T16:44:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/if2-02-cyu3-name-the-translations/sssssbh2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/if2-02-cyu3-name-the-translations/sssssbh2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/if2-02-cyu3-name-the-translations/sssssbh2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/if2-02-cyu3-name-the-translations/sssssbh2"/>
      <lastmod>2026-11-02T11:46:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/if2-02-cyu3-name-the-translations/sssssbh2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/if2-02-cyu3-name-the-translations/sssssbh2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/if2-02-cyu3-name-the-translations/sssssbh2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/if2-02-cyu3-name-the-translations/sssssbh2"/>
      <lastmod>2026-11-02T11:46:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-mean-median-and-sd-are-affected-by-data/sssssbhk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-mean-median-and-sd-are-affected-by-data/sssssbhk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-mean-median-and-sd-are-affected-by-data/sssssbhk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-mean-median-and-sd-are-affected-by-data/sssssbhk"/>
      <lastmod>2026-11-01T19:36:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-mean-median-and-sd-are-affected-by-data/sssssbhk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-mean-median-and-sd-are-affected-by-data/sssssbhk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-mean-median-and-sd-are-affected-by-data/sssssbhk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-mean-median-and-sd-are-affected-by-data/sssssbhk"/>
      <lastmod>2026-11-01T19:36:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-steve-cheung/sssssbhz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-steve-cheung/sssssbhz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demonstration-by-steve-cheung/sssssbhz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-steve-cheung/sssssbhz"/>
      <lastmod>2026-11-02T17:15:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-demonstration-by-steve-cheung/sssssbhz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-steve-cheung/sssssbhz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demonstration-by-steve-cheung/sssssbhz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-steve-cheung/sssssbhz"/>
      <lastmod>2026-11-02T17:15:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-in-the-line-x-0/sssssbh0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-the-line-x-0/sssssbh0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-the-line-x-0/sssssbh0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-the-line-x-0/sssssbh0"/>
      <lastmod>2026-11-01T21:11:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-in-the-line-x-0/sssssbh0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-the-line-x-0/sssssbh0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-the-line-x-0/sssssbh0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-the-line-x-0/sssssbh0"/>
      <lastmod>2026-11-01T21:11:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-derivatives-definition/sssssbhd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivatives-definition/sssssbhd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivatives-definition/sssssbhd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivatives-definition/sssssbhd"/>
      <lastmod>2026-11-01T23:30:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-derivatives-definition/sssssbhd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivatives-definition/sssssbhd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivatives-definition/sssssbhd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivatives-definition/sssssbhd"/>
      <lastmod>2026-11-01T23:30:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/optimization-pizza-box/sssssbhf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-pizza-box/sssssbhf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-pizza-box/sssssbhf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-pizza-box/sssssbhf"/>
      <lastmod>2026-11-01T21:08:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/optimization-pizza-box/sssssbhf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-pizza-box/sssssbhf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-pizza-box/sssssbhf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-pizza-box/sssssbhf"/>
      <lastmod>2026-11-01T21:08:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebraic-fraction-generator/sssssbh8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebraic-fraction-generator/sssssbh8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebraic-fraction-generator/sssssbh8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebraic-fraction-generator/sssssbh8"/>
      <lastmod>2026-11-02T16:41:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebraic-fraction-generator/sssssbh8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebraic-fraction-generator/sssssbh8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebraic-fraction-generator/sssssbh8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebraic-fraction-generator/sssssbh8"/>
      <lastmod>2026-11-02T16:41:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-construction-and-reflection-properties-of-parabolas/sssssbhu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-construction-and-reflection-properties-of-parabolas/sssssbhu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-construction-and-reflection-properties-of-parabolas/sssssbhu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-construction-and-reflection-properties-of-parabolas/sssssbhu"/>
      <lastmod>2026-11-02T10:55:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-construction-and-reflection-properties-of-parabolas/sssssbhu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-construction-and-reflection-properties-of-parabolas/sssssbhu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-construction-and-reflection-properties-of-parabolas/sssssbhu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-construction-and-reflection-properties-of-parabolas/sssssbhu"/>
      <lastmod>2026-11-02T10:55:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hole-18-geometry-demo/sssssbh5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-18-geometry-demo/sssssbh5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hole-18-geometry-demo/sssssbh5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hole-18-geometry-demo/sssssbh5"/>
      <lastmod>2026-11-02T07:34:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hole-18-geometry-demo/sssssbh5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-18-geometry-demo/sssssbh5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hole-18-geometry-demo/sssssbh5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hole-18-geometry-demo/sssssbh5"/>
      <lastmod>2026-11-02T07:34:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/midpoint-segment-addition-postulate-geometric-construction-and-mathematical-con/sssssbhb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoint-segment-addition-postulate-geometric-construction-and-mathematical-con/sssssbhb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoint-segment-addition-postulate-geometric-construction-and-mathematical-con/sssssbhb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoint-segment-addition-postulate-geometric-construction-and-mathematical-con/sssssbhb"/>
      <lastmod>2026-11-02T00:38:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/midpoint-segment-addition-postulate-geometric-construction-and-mathematical-con/sssssbhb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoint-segment-addition-postulate-geometric-construction-and-mathematical-con/sssssbhb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoint-segment-addition-postulate-geometric-construction-and-mathematical-con/sssssbhb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoint-segment-addition-postulate-geometric-construction-and-mathematical-con/sssssbhb"/>
      <lastmod>2026-11-02T00:38:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integration-counter-examples-witch-s-hat-functions/sssssbh3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-counter-examples-witch-s-hat-functions/sssssbh3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-counter-examples-witch-s-hat-functions/sssssbh3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-counter-examples-witch-s-hat-functions/sssssbh3"/>
      <lastmod>2026-11-01T21:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integration-counter-examples-witch-s-hat-functions/sssssbh3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-counter-examples-witch-s-hat-functions/sssssbh3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-counter-examples-witch-s-hat-functions/sssssbh3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-counter-examples-witch-s-hat-functions/sssssbh3"/>
      <lastmod>2026-11-01T21:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-3d-getting-started/sssssbhq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-3d-getting-started/sssssbhq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-3d-getting-started/sssssbhq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-3d-getting-started/sssssbhq"/>
      <lastmod>2026-11-01T23:31:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-3d-getting-started/sssssbhq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-3d-getting-started/sssssbhq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-3d-getting-started/sssssbhq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-3d-getting-started/sssssbhq"/>
      <lastmod>2026-11-01T23:31:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-perimeter-and-area-basics-with-vector-transformations/sssssbh1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-perimeter-and-area-basics-with-vector-transformations/sssssbh1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-perimeter-and-area-basics-with-vector-transformations/sssssbh1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-perimeter-and-area-basics-with-vector-transformations/sssssbh1"/>
      <lastmod>2026-11-02T00:05:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-perimeter-and-area-basics-with-vector-transformations/sssssbh1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-perimeter-and-area-basics-with-vector-transformations/sssssbh1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-perimeter-and-area-basics-with-vector-transformations/sssssbh1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-perimeter-and-area-basics-with-vector-transformations/sssssbh1"/>
      <lastmod>2026-11-02T00:05:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-squares-with-a-common-vertex/sssssbhm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-squares-with-a-common-vertex/sssssbhm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-two-squares-with-a-common-vertex/sssssbhm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-squares-with-a-common-vertex/sssssbhm"/>
      <lastmod>2026-11-02T17:36:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-two-squares-with-a-common-vertex/sssssbhm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-squares-with-a-common-vertex/sssssbhm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-two-squares-with-a-common-vertex/sssssbhm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-squares-with-a-common-vertex/sssssbhm"/>
      <lastmod>2026-11-02T17:36:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/menorah-symmetric-3d-construction-with-vectors-and-linear-equations/sssssbhj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/menorah-symmetric-3d-construction-with-vectors-and-linear-equations/sssssbhj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/menorah-symmetric-3d-construction-with-vectors-and-linear-equations/sssssbhj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/menorah-symmetric-3d-construction-with-vectors-and-linear-equations/sssssbhj"/>
      <lastmod>2026-11-01T21:04:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/menorah-symmetric-3d-construction-with-vectors-and-linear-equations/sssssbhj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/menorah-symmetric-3d-construction-with-vectors-and-linear-equations/sssssbhj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/menorah-symmetric-3d-construction-with-vectors-and-linear-equations/sssssbhj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/menorah-symmetric-3d-construction-with-vectors-and-linear-equations/sssssbhj"/>
      <lastmod>2026-11-01T21:04:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/master-s-degree-student-designs/sssssbhp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/master-s-degree-student-designs/sssssbhp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/master-s-degree-student-designs/sssssbhp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/master-s-degree-student-designs/sssssbhp"/>
      <lastmod>2026-11-01T21:40:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/master-s-degree-student-designs/sssssbhp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/master-s-degree-student-designs/sssssbhp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/master-s-degree-student-designs/sssssbhp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/master-s-degree-student-designs/sssssbhp"/>
      <lastmod>2026-11-01T21:40:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagon-circle-dissection-area-problem-with-hint/sssssbhw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-circle-dissection-area-problem-with-hint/sssssbhw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-circle-dissection-area-problem-with-hint/sssssbhw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-circle-dissection-area-problem-with-hint/sssssbhw"/>
      <lastmod>2026-11-01T19:12:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagon-circle-dissection-area-problem-with-hint/sssssbhw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-circle-dissection-area-problem-with-hint/sssssbhw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-circle-dissection-area-problem-with-hint/sssssbhw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-circle-dissection-area-problem-with-hint/sssssbhw"/>
      <lastmod>2026-11-01T19:12:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-parallelograms-exploration-by-stephanie-neul/sssssbh6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-parallelograms-exploration-by-stephanie-neul/sssssbh6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-parallelograms-exploration-by-stephanie-neul/sssssbh6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-parallelograms-exploration-by-stephanie-neul/sssssbh6"/>
      <lastmod>2026-11-02T13:29:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-parallelograms-exploration-by-stephanie-neul/sssssbh6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-parallelograms-exploration-by-stephanie-neul/sssssbh6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-parallelograms-exploration-by-stephanie-neul/sssssbh6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-parallelograms-exploration-by-stephanie-neul/sssssbh6"/>
      <lastmod>2026-11-02T13:29:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-cubic-bezier-curves/sssssbhg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-cubic-bezier-curves/sssssbhg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-cubic-bezier-curves/sssssbhg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-cubic-bezier-curves/sssssbhg"/>
      <lastmod>2026-11-02T11:44:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-cubic-bezier-curves/sssssbhg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-cubic-bezier-curves/sssssbhg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-cubic-bezier-curves/sssssbhg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-cubic-bezier-curves/sssssbhg"/>
      <lastmod>2026-11-02T11:44:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-geometry-demo/sssssbh9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-geometry-demo/sssssbh9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-geometry-demo/sssssbh9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-geometry-demo/sssssbh9"/>
      <lastmod>2026-11-02T10:45:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-geometry-demo/sssssbh9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-geometry-demo/sssssbh9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-geometry-demo/sssssbh9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-geometry-demo/sssssbh9"/>
      <lastmod>2026-11-02T10:45:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/marked-price-selling-price-cost-discount-profit-loss-diagram/sssssbhe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/marked-price-selling-price-cost-discount-profit-loss-diagram/sssssbhe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/marked-price-selling-price-cost-discount-profit-loss-diagram/sssssbhe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/marked-price-selling-price-cost-discount-profit-loss-diagram/sssssbhe"/>
      <lastmod>2026-11-02T09:28:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/marked-price-selling-price-cost-discount-profit-loss-diagram/sssssbhe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/marked-price-selling-price-cost-discount-profit-loss-diagram/sssssbhe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/marked-price-selling-price-cost-discount-profit-loss-diagram/sssssbhe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/marked-price-selling-price-cost-discount-profit-loss-diagram/sssssbhe"/>
      <lastmod>2026-11-02T09:28:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-asa-theorem-by-ryanmurphy/sssssbhv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-asa-theorem-by-ryanmurphy/sssssbhv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-asa-theorem-by-ryanmurphy/sssssbhv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-asa-theorem-by-ryanmurphy/sssssbhv"/>
      <lastmod>2026-11-01T23:59:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-asa-theorem-by-ryanmurphy/sssssbhv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-asa-theorem-by-ryanmurphy/sssssbhv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-asa-theorem-by-ryanmurphy/sssssbhv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-asa-theorem-by-ryanmurphy/sssssbhv"/>
      <lastmod>2026-11-01T23:59:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trig-ratios-of-special-angles/sssssbh4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-ratios-of-special-angles/sssssbh4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-ratios-of-special-angles/sssssbh4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-ratios-of-special-angles/sssssbh4"/>
      <lastmod>2026-11-02T02:26:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trig-ratios-of-special-angles/sssssbh4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-ratios-of-special-angles/sssssbh4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-ratios-of-special-angles/sssssbh4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-ratios-of-special-angles/sssssbh4"/>
      <lastmod>2026-11-02T02:26:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curve-fitting/sssssbhl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-fitting/sssssbhl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-fitting/sssssbhl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-fitting/sssssbhl"/>
      <lastmod>2026-11-02T02:40:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curve-fitting/sssssbhl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-fitting/sssssbhl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-fitting/sssssbhl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-fitting/sssssbhl"/>
      <lastmod>2026-11-02T02:40:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-intersection-demo-by-geogebra-team/sssssbhy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-intersection-demo-by-geogebra-team/sssssbhy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-intersection-demo-by-geogebra-team/sssssbhy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-intersection-demo-by-geogebra-team/sssssbhy"/>
      <lastmod>2026-11-01T21:20:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-intersection-demo-by-geogebra-team/sssssbhy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-intersection-demo-by-geogebra-team/sssssbhy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-intersection-demo-by-geogebra-team/sssssbhy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-intersection-demo-by-geogebra-team/sssssbhy"/>
      <lastmod>2026-11-01T21:20:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/functions-and-their-tangent-lines/sssssbha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-and-their-tangent-lines/sssssbha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-and-their-tangent-lines/sssssbha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-and-their-tangent-lines/sssssbha"/>
      <lastmod>2026-11-02T15:40:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/functions-and-their-tangent-lines/sssssbha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-and-their-tangent-lines/sssssbha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-and-their-tangent-lines/sssssbha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-and-their-tangent-lines/sssssbha"/>
      <lastmod>2026-11-02T15:40:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/forming-quadratic-equations/sssssbhc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/forming-quadratic-equations/sssssbhc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/forming-quadratic-equations/sssssbhc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/forming-quadratic-equations/sssssbhc"/>
      <lastmod>2026-11-02T18:18:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/forming-quadratic-equations/sssssbhc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/forming-quadratic-equations/sssssbhc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/forming-quadratic-equations/sssssbhc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/forming-quadratic-equations/sssssbhc"/>
      <lastmod>2026-11-02T18:18:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-radians-by-mirjana-bla-evi-mandi/sssssbhr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-radians-by-mirjana-bla-evi-mandi/sssssbhr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-values-on-the-unit-circle-radians-by-mirjana-bla-evi-mandi/sssssbhr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-radians-by-mirjana-bla-evi-mandi/sssssbhr"/>
      <lastmod>2026-11-02T16:56:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exact-values-on-the-unit-circle-radians-by-mirjana-bla-evi-mandi/sssssbhr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-radians-by-mirjana-bla-evi-mandi/sssssbhr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-values-on-the-unit-circle-radians-by-mirjana-bla-evi-mandi/sssssbhr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-radians-by-mirjana-bla-evi-mandi/sssssbhr"/>
      <lastmod>2026-11-02T16:56:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-calculator-by-john-rodgers/sssssbhh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-calculator-by-john-rodgers/sssssbhh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-calculator-by-john-rodgers/sssssbhh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-calculator-by-john-rodgers/sssssbhh"/>
      <lastmod>2026-11-02T13:49:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-calculator-by-john-rodgers/sssssbhh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-calculator-by-john-rodgers/sssssbhh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-calculator-by-john-rodgers/sssssbhh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-calculator-by-john-rodgers/sssssbhh"/>
      <lastmod>2026-11-02T13:49:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-3/sssssbht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-3/sssssbht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan-3/sssssbht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-3/sssssbht"/>
      <lastmod>2026-11-02T17:58:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan-3/sssssbht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-3/sssssbht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan-3/sssssbht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-3/sssssbht"/>
      <lastmod>2026-11-02T17:58:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/expected-value-demonstration/sssssbhx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expected-value-demonstration/sssssbhx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expected-value-demonstration/sssssbhx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expected-value-demonstration/sssssbhx"/>
      <lastmod>2026-11-02T17:12:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/expected-value-demonstration/sssssbhx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expected-value-demonstration/sssssbhx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expected-value-demonstration/sssssbhx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expected-value-demonstration/sssssbhx"/>
      <lastmod>2026-11-02T17:12:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/many-sided-polygon-approaching-a-circle/sssssbhi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/many-sided-polygon-approaching-a-circle/sssssbhi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/many-sided-polygon-approaching-a-circle/sssssbhi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/many-sided-polygon-approaching-a-circle/sssssbhi"/>
      <lastmod>2026-11-02T09:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/many-sided-polygon-approaching-a-circle/sssssbhi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/many-sided-polygon-approaching-a-circle/sssssbhi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/many-sided-polygon-approaching-a-circle/sssssbhi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/many-sided-polygon-approaching-a-circle/sssssbhi"/>
      <lastmod>2026-11-02T09:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/thales-and-the-pyramids/sssssbho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/thales-and-the-pyramids/sssssbho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/thales-and-the-pyramids/sssssbho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/thales-and-the-pyramids/sssssbho"/>
      <lastmod>2026-11-01T20:57:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/thales-and-the-pyramids/sssssbho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/thales-and-the-pyramids/sssssbho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/thales-and-the-pyramids/sssssbho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/thales-and-the-pyramids/sssssbho"/>
      <lastmod>2026-11-01T20:57:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-by-marko-kne-evi/sssssbts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-by-marko-kne-evi/sssssbts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-by-marko-kne-evi/sssssbts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-by-marko-kne-evi/sssssbts"/>
      <lastmod>2026-11-02T12:20:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-by-marko-kne-evi/sssssbts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-by-marko-kne-evi/sssssbts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-by-marko-kne-evi/sssssbts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-by-marko-kne-evi/sssssbts"/>
      <lastmod>2026-11-02T12:20:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-trigonometric-function-characteristics-via-unit-circle/sssssbt7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-function-characteristics-via-unit-circle/sssssbt7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-trigonometric-function-characteristics-via-unit-circle/sssssbt7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-function-characteristics-via-unit-circle/sssssbt7"/>
      <lastmod>2026-11-02T18:33:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-trigonometric-function-characteristics-via-unit-circle/sssssbt7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-function-characteristics-via-unit-circle/sssssbt7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-trigonometric-function-characteristics-via-unit-circle/sssssbt7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-function-characteristics-via-unit-circle/sssssbt7"/>
      <lastmod>2026-11-02T18:33:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-triangle-congruence/sssssbtn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-triangle-congruence/sssssbtn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-triangle-congruence/sssssbtn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-triangle-congruence/sssssbtn"/>
      <lastmod>2026-11-02T18:06:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-triangle-congruence/sssssbtn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-triangle-congruence/sssssbtn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-triangle-congruence/sssssbtn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-triangle-congruence/sssssbtn"/>
      <lastmod>2026-11-02T18:06:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-visualization-of-mean-median-and-mode/sssssbt2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-mean-median-and-mode/sssssbt2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-visualization-of-mean-median-and-mode/sssssbt2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-mean-median-and-mode/sssssbt2"/>
      <lastmod>2026-11-02T11:51:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-visualization-of-mean-median-and-mode/sssssbt2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-mean-median-and-mode/sssssbt2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-visualization-of-mean-median-and-mode/sssssbt2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-mean-median-and-mode/sssssbt2"/>
      <lastmod>2026-11-02T11:51:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-on-a-cone-by-haal8322/sssssbtk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-on-a-cone-by-haal8322/sssssbtk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-on-a-cone-by-haal8322/sssssbtk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-on-a-cone-by-haal8322/sssssbtk"/>
      <lastmod>2026-11-02T02:25:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-on-a-cone-by-haal8322/sssssbtk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-on-a-cone-by-haal8322/sssssbtk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-on-a-cone-by-haal8322/sssssbtk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-on-a-cone-by-haal8322/sssssbtk"/>
      <lastmod>2026-11-02T02:25:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-and-the-circle-through-vertices-of-its-inscribed-rectangles/sssssbtz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-the-circle-through-vertices-of-its-inscribed-rectangles/sssssbtz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-the-circle-through-vertices-of-its-inscribed-rectangles/sssssbtz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-the-circle-through-vertices-of-its-inscribed-rectangles/sssssbtz"/>
      <lastmod>2026-11-02T18:05:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-and-the-circle-through-vertices-of-its-inscribed-rectangles/sssssbtz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-the-circle-through-vertices-of-its-inscribed-rectangles/sssssbtz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-the-circle-through-vertices-of-its-inscribed-rectangles/sssssbtz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-the-circle-through-vertices-of-its-inscribed-rectangles/sssssbtz"/>
      <lastmod>2026-11-02T18:05:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-scaling-and-grid-demo/sssssbt0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-scaling-and-grid-demo/sssssbt0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-scaling-and-grid-demo/sssssbt0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-scaling-and-grid-demo/sssssbt0"/>
      <lastmod>2026-11-01T19:25:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-scaling-and-grid-demo/sssssbt0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-scaling-and-grid-demo/sssssbt0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-scaling-and-grid-demo/sssssbt0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-scaling-and-grid-demo/sssssbt0"/>
      <lastmod>2026-11-01T19:25:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/barandilla-geometry/sssssbtd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/barandilla-geometry/sssssbtd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/barandilla-geometry/sssssbtd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/barandilla-geometry/sssssbtd"/>
      <lastmod>2026-11-01T21:47:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/barandilla-geometry/sssssbtd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/barandilla-geometry/sssssbtd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/barandilla-geometry/sssssbtd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/barandilla-geometry/sssssbtd"/>
      <lastmod>2026-11-01T21:47:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperboloid-views-2/sssssbtf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloid-views-2/sssssbtf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloid-views-2/sssssbtf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloid-views-2/sssssbtf"/>
      <lastmod>2026-11-01T19:25:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperboloid-views-2/sssssbtf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloid-views-2/sssssbtf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloid-views-2/sssssbtf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloid-views-2/sssssbtf"/>
      <lastmod>2026-11-01T19:25:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-design/sssssbt8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-design/sssssbt8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-design/sssssbt8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-design/sssssbt8"/>
      <lastmod>2026-11-02T16:44:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-design/sssssbt8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-design/sssssbt8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-design/sssssbt8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-design/sssssbt8"/>
      <lastmod>2026-11-02T16:44:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-section/sssssbtu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-section/sssssbtu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-section/sssssbtu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-section/sssssbtu"/>
      <lastmod>2026-11-02T16:59:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-section/sssssbtu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-section/sssssbtu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-section/sssssbtu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-section/sssssbtu"/>
      <lastmod>2026-11-02T16:59:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-and-prism-area-calculation/sssssbt5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-and-prism-area-calculation/sssssbt5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-and-prism-area-calculation/sssssbt5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-and-prism-area-calculation/sssssbt5"/>
      <lastmod>2026-11-02T17:11:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-and-prism-area-calculation/sssssbt5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-and-prism-area-calculation/sssssbt5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-and-prism-area-calculation/sssssbt5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-and-prism-area-calculation/sssssbt5"/>
      <lastmod>2026-11-02T17:11:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-altitudes/sssssbtb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-altitudes/sssssbtb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-altitudes/sssssbtb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-altitudes/sssssbtb"/>
      <lastmod>2026-11-02T12:57:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-altitudes/sssssbtb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-altitudes/sssssbtb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-altitudes/sssssbtb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-altitudes/sssssbtb"/>
      <lastmod>2026-11-02T12:57:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complement-and-addition-rule-practice/sssssbt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complement-and-addition-rule-practice/sssssbt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complement-and-addition-rule-practice/sssssbt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complement-and-addition-rule-practice/sssssbt3"/>
      <lastmod>2026-11-01T21:55:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complement-and-addition-rule-practice/sssssbt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complement-and-addition-rule-practice/sssssbt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complement-and-addition-rule-practice/sssssbt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complement-and-addition-rule-practice/sssssbt3"/>
      <lastmod>2026-11-01T21:55:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubic-function-transformations-by-javier-l-pez/sssssbtq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-function-transformations-by-javier-l-pez/sssssbtq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-function-transformations-by-javier-l-pez/sssssbtq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-function-transformations-by-javier-l-pez/sssssbtq"/>
      <lastmod>2026-11-02T18:47:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubic-function-transformations-by-javier-l-pez/sssssbtq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-function-transformations-by-javier-l-pez/sssssbtq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-function-transformations-by-javier-l-pez/sssssbtq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-function-transformations-by-javier-l-pez/sssssbtq"/>
      <lastmod>2026-11-02T18:47:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-integer-points-in-linear-programming-by-stgss-tsn/sssssbt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-integer-points-in-linear-programming-by-stgss-tsn/sssssbt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-integer-points-in-linear-programming-by-stgss-tsn/sssssbt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-integer-points-in-linear-programming-by-stgss-tsn/sssssbt1"/>
      <lastmod>2026-11-01T20:41:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-integer-points-in-linear-programming-by-stgss-tsn/sssssbt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-integer-points-in-linear-programming-by-stgss-tsn/sssssbt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-integer-points-in-linear-programming-by-stgss-tsn/sssssbt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-integer-points-in-linear-programming-by-stgss-tsn/sssssbt1"/>
      <lastmod>2026-11-01T20:41:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-triangular-prism-by-mark-willis/sssssbtm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-triangular-prism-by-mark-willis/sssssbtm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-triangular-prism-by-mark-willis/sssssbtm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-triangular-prism-by-mark-willis/sssssbtm"/>
      <lastmod>2026-11-02T13:15:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-triangular-prism-by-mark-willis/sssssbtm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-triangular-prism-by-mark-willis/sssssbtm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-triangular-prism-by-mark-willis/sssssbtm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-triangular-prism-by-mark-willis/sssssbtm"/>
      <lastmod>2026-11-02T13:15:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/grass-blade-problem/sssssbtj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/grass-blade-problem/sssssbtj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/grass-blade-problem/sssssbtj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/grass-blade-problem/sssssbtj"/>
      <lastmod>2026-11-01T23:28:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/grass-blade-problem/sssssbtj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/grass-blade-problem/sssssbtj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/grass-blade-problem/sssssbtj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/grass-blade-problem/sssssbtj"/>
      <lastmod>2026-11-01T23:28:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tetrahedral-cones/sssssbtp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tetrahedral-cones/sssssbtp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tetrahedral-cones/sssssbtp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tetrahedral-cones/sssssbtp"/>
      <lastmod>2026-11-02T16:36:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tetrahedral-cones/sssssbtp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tetrahedral-cones/sssssbtp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tetrahedral-cones/sssssbtp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tetrahedral-cones/sssssbtp"/>
      <lastmod>2026-11-02T16:36:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rainbow-rotation-illusion/sssssbtw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-rotation-illusion/sssssbtw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-rotation-illusion/sssssbtw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-rotation-illusion/sssssbtw"/>
      <lastmod>2026-11-01T23:15:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rainbow-rotation-illusion/sssssbtw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-rotation-illusion/sssssbtw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-rotation-illusion/sssssbtw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-rotation-illusion/sssssbtw"/>
      <lastmod>2026-11-01T23:15:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cycloid-parameterization/sssssbt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cycloid-parameterization/sssssbt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cycloid-parameterization/sssssbt6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cycloid-parameterization/sssssbt6"/>
      <lastmod>2026-11-02T18:16:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cycloid-parameterization/sssssbt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cycloid-parameterization/sssssbt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cycloid-parameterization/sssssbt6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cycloid-parameterization/sssssbt6"/>
      <lastmod>2026-11-02T18:16:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gauss-elimination-for-3x3-linear-equations/sssssbtg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gauss-elimination-for-3x3-linear-equations/sssssbtg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gauss-elimination-for-3x3-linear-equations/sssssbtg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gauss-elimination-for-3x3-linear-equations/sssssbtg"/>
      <lastmod>2026-11-02T18:37:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gauss-elimination-for-3x3-linear-equations/sssssbtg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gauss-elimination-for-3x3-linear-equations/sssssbtg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gauss-elimination-for-3x3-linear-equations/sssssbtg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gauss-elimination-for-3x3-linear-equations/sssssbtg"/>
      <lastmod>2026-11-02T18:37:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hcf-and-lcm-of-smaller-integers/sssssbt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hcf-and-lcm-of-smaller-integers/sssssbt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hcf-and-lcm-of-smaller-integers/sssssbt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hcf-and-lcm-of-smaller-integers/sssssbt9"/>
      <lastmod>2026-11-02T13:01:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hcf-and-lcm-of-smaller-integers/sssssbt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hcf-and-lcm-of-smaller-integers/sssssbt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hcf-and-lcm-of-smaller-integers/sssssbt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hcf-and-lcm-of-smaller-integers/sssssbt9"/>
      <lastmod>2026-11-02T13:01:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-1-sssss4wb/sssssbte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-1-sssss4wb/sssssbte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-1-sssss4wb/sssssbte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-1-sssss4wb/sssssbte"/>
      <lastmod>2026-11-02T18:32:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-1-sssss4wb/sssssbte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-1-sssss4wb/sssssbte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-1-sssss4wb/sssssbte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-1-sssss4wb/sssssbte"/>
      <lastmod>2026-11-02T18:32:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-addition-modeling-practice/sssssbtv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-modeling-practice/sssssbtv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-modeling-practice/sssssbtv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-modeling-practice/sssssbtv"/>
      <lastmod>2026-11-01T23:15:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-addition-modeling-practice/sssssbtv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-modeling-practice/sssssbtv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-modeling-practice/sssssbtv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-modeling-practice/sssssbtv"/>
      <lastmod>2026-11-01T23:15:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/position-speed-and-direction-practice/sssssbt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/position-speed-and-direction-practice/sssssbt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/position-speed-and-direction-practice/sssssbt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/position-speed-and-direction-practice/sssssbt4"/>
      <lastmod>2026-11-01T22:56:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/position-speed-and-direction-practice/sssssbt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/position-speed-and-direction-practice/sssssbt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/position-speed-and-direction-practice/sssssbt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/position-speed-and-direction-practice/sssssbt4"/>
      <lastmod>2026-11-01T22:56:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-practice-1-scored/sssssbtl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-practice-1-scored/sssssbtl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-practice-1-scored/sssssbtl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-practice-1-scored/sssssbtl"/>
      <lastmod>2026-11-02T08:56:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-practice-1-scored/sssssbtl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-practice-1-scored/sssssbtl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-practice-1-scored/sssssbtl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-practice-1-scored/sssssbtl"/>
      <lastmod>2026-11-02T08:56:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-disk-1-2/sssssbty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-disk-1-2/sssssbty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-disk-1-2/sssssbty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-disk-1-2/sssssbty"/>
      <lastmod>2026-11-02T17:05:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-disk-1-2/sssssbty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-disk-1-2/sssssbty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-disk-1-2/sssssbty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-disk-1-2/sssssbty"/>
      <lastmod>2026-11-02T17:05:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gathering-like-terms-cards/sssssbta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gathering-like-terms-cards/sssssbta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gathering-like-terms-cards/sssssbta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gathering-like-terms-cards/sssssbta"/>
      <lastmod>2026-11-02T17:50:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gathering-like-terms-cards/sssssbta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gathering-like-terms-cards/sssssbta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gathering-like-terms-cards/sssssbta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gathering-like-terms-cards/sssssbta"/>
      <lastmod>2026-11-02T17:50:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/completing-the-square-quiz-generator/sssssbtc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/completing-the-square-quiz-generator/sssssbtc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/completing-the-square-quiz-generator/sssssbtc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/completing-the-square-quiz-generator/sssssbtc"/>
      <lastmod>2026-11-02T18:12:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/completing-the-square-quiz-generator/sssssbtc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/completing-the-square-quiz-generator/sssssbtc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/completing-the-square-quiz-generator/sssssbtc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/completing-the-square-quiz-generator/sssssbtc"/>
      <lastmod>2026-11-02T18:12:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translations-on-a-grid/sssssbtr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-on-a-grid/sssssbtr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-on-a-grid/sssssbtr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-on-a-grid/sssssbtr"/>
      <lastmod>2026-11-01T21:23:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translations-on-a-grid/sssssbtr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-on-a-grid/sssssbtr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-on-a-grid/sssssbtr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-on-a-grid/sssssbtr"/>
      <lastmod>2026-11-01T21:23:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-and-y-intercept-with-hints/sssssbth</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-and-y-intercept-with-hints/sssssbth"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-and-y-intercept-with-hints/sssssbth"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-and-y-intercept-with-hints/sssssbth"/>
      <lastmod>2026-11-01T20:53:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-and-y-intercept-with-hints/sssssbth</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-and-y-intercept-with-hints/sssssbth"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-and-y-intercept-with-hints/sssssbth"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-and-y-intercept-with-hints/sssssbth"/>
      <lastmod>2026-11-01T20:53:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mei-further-maths-statistics-ex8-1-q10-histogram-construction/sssssbtt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mei-further-maths-statistics-ex8-1-q10-histogram-construction/sssssbtt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mei-further-maths-statistics-ex8-1-q10-histogram-construction/sssssbtt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mei-further-maths-statistics-ex8-1-q10-histogram-construction/sssssbtt"/>
      <lastmod>2026-11-01T19:36:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mei-further-maths-statistics-ex8-1-q10-histogram-construction/sssssbtt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mei-further-maths-statistics-ex8-1-q10-histogram-construction/sssssbtt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mei-further-maths-statistics-ex8-1-q10-histogram-construction/sssssbtt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mei-further-maths-statistics-ex8-1-q10-histogram-construction/sssssbtt"/>
      <lastmod>2026-11-01T19:36:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-tangent-circles-tangents-and-secant/sssssbtx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-tangent-circles-tangents-and-secant/sssssbtx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-tangent-circles-tangents-and-secant/sssssbtx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-tangent-circles-tangents-and-secant/sssssbtx"/>
      <lastmod>2026-11-02T18:22:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-tangent-circles-tangents-and-secant/sssssbtx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-tangent-circles-tangents-and-secant/sssssbtx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-tangent-circles-tangents-and-secant/sssssbtx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-tangent-circles-tangents-and-secant/sssssbtx"/>
      <lastmod>2026-11-02T18:22:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-cylindric-parabolas/sssssbti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cylindric-parabolas/sssssbti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cylindric-parabolas/sssssbti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cylindric-parabolas/sssssbti"/>
      <lastmod>2026-11-02T17:56:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-cylindric-parabolas/sssssbti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cylindric-parabolas/sssssbti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cylindric-parabolas/sssssbti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cylindric-parabolas/sssssbti"/>
      <lastmod>2026-11-02T17:56:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-equations-with-variables-on-both-sides/sssssbto</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-equations-with-variables-on-both-sides/sssssbto"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-equations-with-variables-on-both-sides/sssssbto"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-equations-with-variables-on-both-sides/sssssbto"/>
      <lastmod>2026-11-02T16:58:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-equations-with-variables-on-both-sides/sssssbto</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-equations-with-variables-on-both-sides/sssssbto"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-equations-with-variables-on-both-sides/sssssbto"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-equations-with-variables-on-both-sides/sssssbto"/>
      <lastmod>2026-11-02T16:58:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-to-hyperbola/sssssbxs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-to-hyperbola/sssssbxs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-to-hyperbola/sssssbxs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-to-hyperbola/sssssbxs"/>
      <lastmod>2026-11-01T23:40:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-to-hyperbola/sssssbxs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-to-hyperbola/sssssbxs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-to-hyperbola/sssssbxs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-to-hyperbola/sssssbxs"/>
      <lastmod>2026-11-01T23:40:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones-3/sssssbx7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones-3/sssssbx7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exploration-by-barbara-e-jones-3/sssssbx7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones-3/sssssbx7"/>
      <lastmod>2026-11-02T08:34:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-exploration-by-barbara-e-jones-3/sssssbx7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones-3/sssssbx7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exploration-by-barbara-e-jones-3/sssssbx7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones-3/sssssbx7"/>
      <lastmod>2026-11-02T08:34:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-of-a-difference-trig-identity-puzzle-proof/sssssbxn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-of-a-difference-trig-identity-puzzle-proof/sssssbxn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-of-a-difference-trig-identity-puzzle-proof/sssssbxn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-of-a-difference-trig-identity-puzzle-proof/sssssbxn"/>
      <lastmod>2026-11-02T13:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-of-a-difference-trig-identity-puzzle-proof/sssssbxn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-of-a-difference-trig-identity-puzzle-proof/sssssbxn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-of-a-difference-trig-identity-puzzle-proof/sssssbxn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-of-a-difference-trig-identity-puzzle-proof/sssssbxn"/>
      <lastmod>2026-11-02T13:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/u4-review-translations/sssssbx2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/u4-review-translations/sssssbx2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/u4-review-translations/sssssbx2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/u4-review-translations/sssssbx2"/>
      <lastmod>2026-11-02T15:51:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/u4-review-translations/sssssbx2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/u4-review-translations/sssssbx2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/u4-review-translations/sssssbx2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/u4-review-translations/sssssbx2"/>
      <lastmod>2026-11-02T15:51:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-graphs-and-geometric-constructions-example/sssssbxk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphs-and-geometric-constructions-example/sssssbxk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphs-and-geometric-constructions-example/sssssbxk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphs-and-geometric-constructions-example/sssssbxk"/>
      <lastmod>2026-11-02T09:37:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-graphs-and-geometric-constructions-example/sssssbxk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphs-and-geometric-constructions-example/sssssbxk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphs-and-geometric-constructions-example/sssssbxk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphs-and-geometric-constructions-example/sssssbxk"/>
      <lastmod>2026-11-02T09:37:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratio-of-a-circle-dynamic-visualization-of-area-and-circumference/sssssbxz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-of-a-circle-dynamic-visualization-of-area-and-circumference/sssssbxz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-of-a-circle-dynamic-visualization-of-area-and-circumference/sssssbxz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-of-a-circle-dynamic-visualization-of-area-and-circumference/sssssbxz"/>
      <lastmod>2026-11-02T17:54:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratio-of-a-circle-dynamic-visualization-of-area-and-circumference/sssssbxz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-of-a-circle-dynamic-visualization-of-area-and-circumference/sssssbxz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-of-a-circle-dynamic-visualization-of-area-and-circumference/sssssbxz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-of-a-circle-dynamic-visualization-of-area-and-circumference/sssssbxz"/>
      <lastmod>2026-11-02T17:54:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/projection-line-intersection-demo/sssssbx0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projection-line-intersection-demo/sssssbx0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projection-line-intersection-demo/sssssbx0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projection-line-intersection-demo/sssssbx0"/>
      <lastmod>2026-11-02T02:31:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/projection-line-intersection-demo/sssssbx0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projection-line-intersection-demo/sssssbx0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projection-line-intersection-demo/sssssbx0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projection-line-intersection-demo/sssssbx0"/>
      <lastmod>2026-11-02T02:31:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proving-theorems-interactive-geometry-with-circles-sectors-and-vector-transfo/sssssbxd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-theorems-interactive-geometry-with-circles-sectors-and-vector-transfo/sssssbxd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-theorems-interactive-geometry-with-circles-sectors-and-vector-transfo/sssssbxd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-theorems-interactive-geometry-with-circles-sectors-and-vector-transfo/sssssbxd"/>
      <lastmod>2026-11-02T15:18:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proving-theorems-interactive-geometry-with-circles-sectors-and-vector-transfo/sssssbxd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-theorems-interactive-geometry-with-circles-sectors-and-vector-transfo/sssssbxd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-theorems-interactive-geometry-with-circles-sectors-and-vector-transfo/sssssbxd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-theorems-interactive-geometry-with-circles-sectors-and-vector-transfo/sssssbxd"/>
      <lastmod>2026-11-02T15:18:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-improper-fractions/sssssbxf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-improper-fractions/sssssbxf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-improper-fractions/sssssbxf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-improper-fractions/sssssbxf"/>
      <lastmod>2026-11-02T18:58:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-improper-fractions/sssssbxf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-improper-fractions/sssssbxf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-improper-fractions/sssssbxf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-improper-fractions/sssssbxf"/>
      <lastmod>2026-11-02T18:58:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-moniquep/sssssbx8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-moniquep/sssssbx8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rectangular-prism-by-moniquep/sssssbx8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-moniquep/sssssbx8"/>
      <lastmod>2026-11-02T17:15:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-rectangular-prism-by-moniquep/sssssbx8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-moniquep/sssssbx8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rectangular-prism-by-moniquep/sssssbx8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-moniquep/sssssbx8"/>
      <lastmod>2026-11-02T17:15:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/corollary-12-1-4-example/sssssbxu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corollary-12-1-4-example/sssssbxu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corollary-12-1-4-example/sssssbxu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corollary-12-1-4-example/sssssbxu"/>
      <lastmod>2026-11-02T00:54:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/corollary-12-1-4-example/sssssbxu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corollary-12-1-4-example/sssssbxu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corollary-12-1-4-example/sssssbxu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corollary-12-1-4-example/sssssbxu"/>
      <lastmod>2026-11-02T00:54:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-auston-b-cron-2/sssssbx5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-auston-b-cron-2/sssssbx5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-auston-b-cron-2/sssssbx5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-auston-b-cron-2/sssssbx5"/>
      <lastmod>2026-11-02T15:18:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-auston-b-cron-2/sssssbx5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-auston-b-cron-2/sssssbx5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-auston-b-cron-2/sssssbx5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-auston-b-cron-2/sssssbx5"/>
      <lastmod>2026-11-02T15:18:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagon-rotation-puzzle/sssssbxb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-rotation-puzzle/sssssbxb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-rotation-puzzle/sssssbxb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-rotation-puzzle/sssssbxb"/>
      <lastmod>2026-11-02T09:32:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagon-rotation-puzzle/sssssbxb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-rotation-puzzle/sssssbxb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-rotation-puzzle/sssssbxb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-rotation-puzzle/sssssbxb"/>
      <lastmod>2026-11-02T09:32:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-on-a-directed-line-segment/sssssbx3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-on-a-directed-line-segment/sssssbx3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-on-a-directed-line-segment/sssssbx3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-on-a-directed-line-segment/sssssbx3"/>
      <lastmod>2026-11-02T18:49:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-on-a-directed-line-segment/sssssbx3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-on-a-directed-line-segment/sssssbx3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-on-a-directed-line-segment/sssssbx3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-on-a-directed-line-segment/sssssbx3"/>
      <lastmod>2026-11-02T18:49:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-systems-of-linear-equations/sssssbxq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-systems-of-linear-equations/sssssbxq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-systems-of-linear-equations/sssssbxq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-systems-of-linear-equations/sssssbxq"/>
      <lastmod>2026-11-02T17:01:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-systems-of-linear-equations/sssssbxq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-systems-of-linear-equations/sssssbxq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-systems-of-linear-equations/sssssbxq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-systems-of-linear-equations/sssssbxq"/>
      <lastmod>2026-11-02T17:01:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diagonals-of-isosceles-trapezoid/sssssbx1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-isosceles-trapezoid/sssssbx1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-isosceles-trapezoid/sssssbx1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-isosceles-trapezoid/sssssbx1"/>
      <lastmod>2026-11-02T18:46:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diagonals-of-isosceles-trapezoid/sssssbx1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-isosceles-trapezoid/sssssbx1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-isosceles-trapezoid/sssssbx1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-isosceles-trapezoid/sssssbx1"/>
      <lastmod>2026-11-02T18:46:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-function-demo/sssssbxm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-function-demo/sssssbxm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-function-demo/sssssbxm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-function-demo/sssssbxm"/>
      <lastmod>2026-11-01T20:50:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-function-demo/sssssbxm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-function-demo/sssssbxm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-function-demo/sssssbxm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-function-demo/sssssbxm"/>
      <lastmod>2026-11-01T20:50:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-point-symmetry/sssssbxj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-point-symmetry/sssssbxj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-point-symmetry/sssssbxj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-point-symmetry/sssssbxj"/>
      <lastmod>2026-11-02T00:38:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-point-symmetry/sssssbxj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-point-symmetry/sssssbxj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-point-symmetry/sssssbxj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-point-symmetry/sssssbxj"/>
      <lastmod>2026-11-02T00:38:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cylinder-by-co-daly/sssssbxp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder-by-co-daly/sssssbxp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder-by-co-daly/sssssbxp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder-by-co-daly/sssssbxp"/>
      <lastmod>2026-11-02T18:15:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cylinder-by-co-daly/sssssbxp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder-by-co-daly/sssssbxp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder-by-co-daly/sssssbxp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder-by-co-daly/sssssbxp"/>
      <lastmod>2026-11-02T18:15:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-between-two-points/sssssbxw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-between-two-points/sssssbxw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-between-two-points/sssssbxw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-between-two-points/sssssbxw"/>
      <lastmod>2026-11-02T17:39:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-between-two-points/sssssbxw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-between-two-points/sssssbxw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-between-two-points/sssssbxw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-between-two-points/sssssbxw"/>
      <lastmod>2026-11-02T17:39:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-demo-by-k-hodgson/sssssbx6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-k-hodgson/sssssbx6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demo-by-k-hodgson/sssssbx6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-k-hodgson/sssssbx6"/>
      <lastmod>2026-11-01T19:30:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-demo-by-k-hodgson/sssssbx6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-k-hodgson/sssssbx6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demo-by-k-hodgson/sssssbx6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-k-hodgson/sssssbx6"/>
      <lastmod>2026-11-01T19:30:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/improper-fractions-visual-improved/sssssbxg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/improper-fractions-visual-improved/sssssbxg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/improper-fractions-visual-improved/sssssbxg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/improper-fractions-visual-improved/sssssbxg"/>
      <lastmod>2026-11-01T21:29:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/improper-fractions-visual-improved/sssssbxg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/improper-fractions-visual-improved/sssssbxg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/improper-fractions-visual-improved/sssssbxg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/improper-fractions-visual-improved/sssssbxg"/>
      <lastmod>2026-11-01T21:29:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curve-discussion-extremum-inflection-point/sssssbx9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-discussion-extremum-inflection-point/sssssbx9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-discussion-extremum-inflection-point/sssssbx9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-discussion-extremum-inflection-point/sssssbx9"/>
      <lastmod>2026-11-02T11:44:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curve-discussion-extremum-inflection-point/sssssbx9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-discussion-extremum-inflection-point/sssssbx9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-discussion-extremum-inflection-point/sssssbx9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-discussion-extremum-inflection-point/sssssbx9"/>
      <lastmod>2026-11-02T11:44:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-e-x-visualizing-tangent-slope-and-function/sssssbxe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-e-x-visualizing-tangent-slope-and-function/sssssbxe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-e-x-visualizing-tangent-slope-and-function/sssssbxe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-e-x-visualizing-tangent-slope-and-function/sssssbxe"/>
      <lastmod>2026-11-02T03:10:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-e-x-visualizing-tangent-slope-and-function/sssssbxe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-e-x-visualizing-tangent-slope-and-function/sssssbxe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-e-x-visualizing-tangent-slope-and-function/sssssbxe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-e-x-visualizing-tangent-slope-and-function/sssssbxe"/>
      <lastmod>2026-11-02T03:10:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-investigation/sssssbxv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-investigation/sssssbxv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-investigation/sssssbxv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-investigation/sssssbxv"/>
      <lastmod>2026-11-01T19:37:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-investigation/sssssbxv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-investigation/sssssbxv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-investigation/sssssbxv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-investigation/sssssbxv"/>
      <lastmod>2026-11-01T19:37:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simplifying-fractions/sssssbx4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplifying-fractions/sssssbx4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplifying-fractions/sssssbx4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplifying-fractions/sssssbx4"/>
      <lastmod>2026-11-02T17:01:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simplifying-fractions/sssssbx4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplifying-fractions/sssssbx4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplifying-fractions/sssssbx4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplifying-fractions/sssssbx4"/>
      <lastmod>2026-11-02T17:01:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sinusoidal-surface-construction/sssssbxl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sinusoidal-surface-construction/sssssbxl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sinusoidal-surface-construction/sssssbxl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sinusoidal-surface-construction/sssssbxl"/>
      <lastmod>2026-11-02T16:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sinusoidal-surface-construction/sssssbxl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sinusoidal-surface-construction/sssssbxl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sinusoidal-surface-construction/sssssbxl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sinusoidal-surface-construction/sssssbxl"/>
      <lastmod>2026-11-02T16:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-hyperbola-geometric-construction-and-graph/sssssbxy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-hyperbola-geometric-construction-and-graph/sssssbxy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-hyperbola-geometric-construction-and-graph/sssssbxy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-hyperbola-geometric-construction-and-graph/sssssbxy"/>
      <lastmod>2026-11-02T18:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-hyperbola-geometric-construction-and-graph/sssssbxy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-hyperbola-geometric-construction-and-graph/sssssbxy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-hyperbola-geometric-construction-and-graph/sssssbxy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-hyperbola-geometric-construction-and-graph/sssssbxy"/>
      <lastmod>2026-11-02T18:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-and-surface-area-of-cylinders-and-cones/sssssbxa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-cylinders-and-cones/sssssbxa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-surface-area-of-cylinders-and-cones/sssssbxa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-cylinders-and-cones/sssssbxa"/>
      <lastmod>2026-11-02T00:32:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-and-surface-area-of-cylinders-and-cones/sssssbxa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-cylinders-and-cones/sssssbxa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-surface-area-of-cylinders-and-cones/sssssbxa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-cylinders-and-cones/sssssbxa"/>
      <lastmod>2026-11-02T00:32:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflecting-shapes/sssssbxc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflecting-shapes/sssssbxc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflecting-shapes/sssssbxc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflecting-shapes/sssssbxc"/>
      <lastmod>2026-11-01T22:03:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflecting-shapes/sssssbxc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflecting-shapes/sssssbxc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflecting-shapes/sssssbxc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflecting-shapes/sssssbxc"/>
      <lastmod>2026-11-01T22:03:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fundamental-theorem-of-calculus-by-malin-christersson/sssssbxr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fundamental-theorem-of-calculus-by-malin-christersson/sssssbxr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fundamental-theorem-of-calculus-by-malin-christersson/sssssbxr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fundamental-theorem-of-calculus-by-malin-christersson/sssssbxr"/>
      <lastmod>2026-11-02T02:45:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fundamental-theorem-of-calculus-by-malin-christersson/sssssbxr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fundamental-theorem-of-calculus-by-malin-christersson/sssssbxr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fundamental-theorem-of-calculus-by-malin-christersson/sssssbxr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fundamental-theorem-of-calculus-by-malin-christersson/sssssbxr"/>
      <lastmod>2026-11-02T02:45:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reasoning-about-square-roots-practice/sssssbxh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-about-square-roots-practice/sssssbxh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-about-square-roots-practice/sssssbxh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-about-square-roots-practice/sssssbxh"/>
      <lastmod>2026-11-02T10:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reasoning-about-square-roots-practice/sssssbxh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-about-square-roots-practice/sssssbxh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-about-square-roots-practice/sssssbxh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-about-square-roots-practice/sssssbxh"/>
      <lastmod>2026-11-02T10:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/traffic-matrix-network-flow/sssssbxt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/traffic-matrix-network-flow/sssssbxt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/traffic-matrix-network-flow/sssssbxt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/traffic-matrix-network-flow/sssssbxt"/>
      <lastmod>2026-11-01T21:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/traffic-matrix-network-flow/sssssbxt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/traffic-matrix-network-flow/sssssbxt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/traffic-matrix-network-flow/sssssbxt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/traffic-matrix-network-flow/sssssbxt"/>
      <lastmod>2026-11-01T21:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copy-line-segments/sssssbxx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-line-segments/sssssbxx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-line-segments/sssssbxx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-line-segments/sssssbxx"/>
      <lastmod>2026-11-01T21:57:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copy-line-segments/sssssbxx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-line-segments/sssssbxx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-line-segments/sssssbxx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-line-segments/sssssbxx"/>
      <lastmod>2026-11-01T21:57:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/whistler-applet-1-multiply-geometric-transformations-and-vector-applications/sssssbxi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/whistler-applet-1-multiply-geometric-transformations-and-vector-applications/sssssbxi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/whistler-applet-1-multiply-geometric-transformations-and-vector-applications/sssssbxi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/whistler-applet-1-multiply-geometric-transformations-and-vector-applications/sssssbxi"/>
      <lastmod>2026-11-02T00:11:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/whistler-applet-1-multiply-geometric-transformations-and-vector-applications/sssssbxi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/whistler-applet-1-multiply-geometric-transformations-and-vector-applications/sssssbxi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/whistler-applet-1-multiply-geometric-transformations-and-vector-applications/sssssbxi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/whistler-applet-1-multiply-geometric-transformations-and-vector-applications/sssssbxi"/>
      <lastmod>2026-11-02T00:11:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dependence-of-vertex-average-distance-on-truncation-parameter-in-a-truncated-oct/sssssbxo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dependence-of-vertex-average-distance-on-truncation-parameter-in-a-truncated-oct/sssssbxo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dependence-of-vertex-average-distance-on-truncation-parameter-in-a-truncated-oct/sssssbxo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dependence-of-vertex-average-distance-on-truncation-parameter-in-a-truncated-oct/sssssbxo"/>
      <lastmod>2026-11-01T21:02:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dependence-of-vertex-average-distance-on-truncation-parameter-in-a-truncated-oct/sssssbxo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dependence-of-vertex-average-distance-on-truncation-parameter-in-a-truncated-oct/sssssbxo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dependence-of-vertex-average-distance-on-truncation-parameter-in-a-truncated-oct/sssssbxo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dependence-of-vertex-average-distance-on-truncation-parameter-in-a-truncated-oct/sssssbxo"/>
      <lastmod>2026-11-01T21:02:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-subtraction-on-number-line/sssssbis</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-subtraction-on-number-line/sssssbis"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-subtraction-on-number-line/sssssbis"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-subtraction-on-number-line/sssssbis"/>
      <lastmod>2026-11-02T16:35:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-subtraction-on-number-line/sssssbis</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-subtraction-on-number-line/sssssbis"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-subtraction-on-number-line/sssssbis"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-subtraction-on-number-line/sssssbis"/>
      <lastmod>2026-11-02T16:35:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visual-model-for-subtracting-fractions/sssssbi7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-model-for-subtracting-fractions/sssssbi7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-model-for-subtracting-fractions/sssssbi7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-model-for-subtracting-fractions/sssssbi7"/>
      <lastmod>2026-11-01T19:35:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visual-model-for-subtracting-fractions/sssssbi7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-model-for-subtracting-fractions/sssssbi7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-model-for-subtracting-fractions/sssssbi7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-model-for-subtracting-fractions/sssssbi7"/>
      <lastmod>2026-11-01T19:35:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution/sssssbin</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution/sssssbin"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution/sssssbin"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution/sssssbin"/>
      <lastmod>2026-11-01T23:47:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution/sssssbin</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution/sssssbin"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution/sssssbin"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution/sssssbin"/>
      <lastmod>2026-11-01T23:47:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-sequence-demonstration/sssssbi2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-demonstration/sssssbi2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-demonstration/sssssbi2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-demonstration/sssssbi2"/>
      <lastmod>2026-11-02T13:36:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-sequence-demonstration/sssssbi2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-demonstration/sssssbi2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-demonstration/sssssbi2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-demonstration/sssssbi2"/>
      <lastmod>2026-11-02T13:36:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-and-perimeter-of-a-rectangle-by-merton-dsilva/sssssbik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-a-rectangle-by-merton-dsilva/sssssbik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-a-rectangle-by-merton-dsilva/sssssbik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-a-rectangle-by-merton-dsilva/sssssbik"/>
      <lastmod>2026-11-01T19:27:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-and-perimeter-of-a-rectangle-by-merton-dsilva/sssssbik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-a-rectangle-by-merton-dsilva/sssssbik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-a-rectangle-by-merton-dsilva/sssssbik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-a-rectangle-by-merton-dsilva/sssssbik"/>
      <lastmod>2026-11-01T19:27:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-area-ratio-demonstration/sssssbiz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-ratio-demonstration/sssssbiz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-ratio-demonstration/sssssbiz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-ratio-demonstration/sssssbiz"/>
      <lastmod>2026-11-02T18:26:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-area-ratio-demonstration/sssssbiz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-ratio-demonstration/sssssbiz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-ratio-demonstration/sssssbiz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-ratio-demonstration/sssssbiz"/>
      <lastmod>2026-11-02T18:26:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/robot-avoiding-enemies/sssssbi0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/robot-avoiding-enemies/sssssbi0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/robot-avoiding-enemies/sssssbi0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/robot-avoiding-enemies/sssssbi0"/>
      <lastmod>2026-11-02T17:41:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/robot-avoiding-enemies/sssssbi0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/robot-avoiding-enemies/sssssbi0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/robot-avoiding-enemies/sssssbi0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/robot-avoiding-enemies/sssssbi0"/>
      <lastmod>2026-11-02T17:41:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hl-exploration-dynamic-construction-of-right-triangle-congruence/sssssbid</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hl-exploration-dynamic-construction-of-right-triangle-congruence/sssssbid"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hl-exploration-dynamic-construction-of-right-triangle-congruence/sssssbid"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hl-exploration-dynamic-construction-of-right-triangle-congruence/sssssbid"/>
      <lastmod>2026-11-01T21:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hl-exploration-dynamic-construction-of-right-triangle-congruence/sssssbid</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hl-exploration-dynamic-construction-of-right-triangle-congruence/sssssbid"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hl-exploration-dynamic-construction-of-right-triangle-congruence/sssssbid"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hl-exploration-dynamic-construction-of-right-triangle-congruence/sssssbid"/>
      <lastmod>2026-11-01T21:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-power-functions-y-x-n/sssssbif</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-power-functions-y-x-n/sssssbif"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-power-functions-y-x-n/sssssbif"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-power-functions-y-x-n/sssssbif"/>
      <lastmod>2026-11-02T18:30:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-power-functions-y-x-n/sssssbif</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-power-functions-y-x-n/sssssbif"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-power-functions-y-x-n/sssssbif"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-power-functions-y-x-n/sssssbif"/>
      <lastmod>2026-11-02T18:30:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-gcd-and-lcm-by-geogebra-team/sssssbi8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-gcd-and-lcm-by-geogebra-team/sssssbi8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-gcd-and-lcm-by-geogebra-team/sssssbi8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-gcd-and-lcm-by-geogebra-team/sssssbi8"/>
      <lastmod>2026-11-01T22:02:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-gcd-and-lcm-by-geogebra-team/sssssbi8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-gcd-and-lcm-by-geogebra-team/sssssbi8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-gcd-and-lcm-by-geogebra-team/sssssbi8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-gcd-and-lcm-by-geogebra-team/sssssbi8"/>
      <lastmod>2026-11-01T22:02:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-7-11-practice-points-on-the-coordinate-plane/sssssbiu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-7-11-practice-points-on-the-coordinate-plane/sssssbiu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-7-11-practice-points-on-the-coordinate-plane/sssssbiu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-7-11-practice-points-on-the-coordinate-plane/sssssbiu"/>
      <lastmod>2026-11-02T10:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-7-11-practice-points-on-the-coordinate-plane/sssssbiu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-7-11-practice-points-on-the-coordinate-plane/sssssbiu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-7-11-practice-points-on-the-coordinate-plane/sssssbiu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-7-11-practice-points-on-the-coordinate-plane/sssssbiu"/>
      <lastmod>2026-11-02T10:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-isomorphism-demo/sssssbi5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-isomorphism-demo/sssssbi5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-isomorphism-demo/sssssbi5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-isomorphism-demo/sssssbi5"/>
      <lastmod>2026-11-01T19:11:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-isomorphism-demo/sssssbi5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-isomorphism-demo/sssssbi5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-isomorphism-demo/sssssbi5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-isomorphism-demo/sssssbi5"/>
      <lastmod>2026-11-01T19:11:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/different-prices-task/sssssbib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-prices-task/sssssbib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-prices-task/sssssbib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-prices-task/sssssbib"/>
      <lastmod>2026-11-02T18:04:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/different-prices-task/sssssbib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-prices-task/sssssbib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-prices-task/sssssbib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-prices-task/sssssbib"/>
      <lastmod>2026-11-02T18:04:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/escher-inspired-patterns/sssssbi3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/escher-inspired-patterns/sssssbi3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/escher-inspired-patterns/sssssbi3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/escher-inspired-patterns/sssssbi3"/>
      <lastmod>2026-11-02T08:31:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/escher-inspired-patterns/sssssbi3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/escher-inspired-patterns/sssssbi3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/escher-inspired-patterns/sssssbi3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/escher-inspired-patterns/sssssbi3"/>
      <lastmod>2026-11-02T08:31:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/265bfe-summer-jobs-example/sssssbiq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/265bfe-summer-jobs-example/sssssbiq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/265bfe-summer-jobs-example/sssssbiq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/265bfe-summer-jobs-example/sssssbiq"/>
      <lastmod>2026-11-02T18:59:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/265bfe-summer-jobs-example/sssssbiq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/265bfe-summer-jobs-example/sssssbiq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/265bfe-summer-jobs-example/sssssbiq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/265bfe-summer-jobs-example/sssssbiq"/>
      <lastmod>2026-11-02T18:59:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factorization-of-quadratic-polynomials/sssssbi1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factorization-of-quadratic-polynomials/sssssbi1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factorization-of-quadratic-polynomials/sssssbi1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factorization-of-quadratic-polynomials/sssssbi1"/>
      <lastmod>2026-11-01T21:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factorization-of-quadratic-polynomials/sssssbi1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factorization-of-quadratic-polynomials/sssssbi1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factorization-of-quadratic-polynomials/sssssbi1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factorization-of-quadratic-polynomials/sssssbi1"/>
      <lastmod>2026-11-01T21:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/soma-cube-240-solutions-3d-geogebra-demonstration/sssssbim</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/soma-cube-240-solutions-3d-geogebra-demonstration/sssssbim"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/soma-cube-240-solutions-3d-geogebra-demonstration/sssssbim"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/soma-cube-240-solutions-3d-geogebra-demonstration/sssssbim"/>
      <lastmod>2026-11-02T18:39:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/soma-cube-240-solutions-3d-geogebra-demonstration/sssssbim</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/soma-cube-240-solutions-3d-geogebra-demonstration/sssssbim"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/soma-cube-240-solutions-3d-geogebra-demonstration/sssssbim"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/soma-cube-240-solutions-3d-geogebra-demonstration/sssssbim"/>
      <lastmod>2026-11-02T18:39:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shapes-with-same-area/sssssbij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shapes-with-same-area/sssssbij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shapes-with-same-area/sssssbij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shapes-with-same-area/sssssbij"/>
      <lastmod>2026-11-02T08:51:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shapes-with-same-area/sssssbij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shapes-with-same-area/sssssbij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shapes-with-same-area/sssssbij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shapes-with-same-area/sssssbij"/>
      <lastmod>2026-11-02T08:51:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-first-4-terms-of-a-sequence/sssssbip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-first-4-terms-of-a-sequence/sssssbip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-first-4-terms-of-a-sequence/sssssbip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-first-4-terms-of-a-sequence/sssssbip"/>
      <lastmod>2026-11-02T02:20:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-first-4-terms-of-a-sequence/sssssbip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-first-4-terms-of-a-sequence/sssssbip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-first-4-terms-of-a-sequence/sssssbip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-first-4-terms-of-a-sequence/sssssbip"/>
      <lastmod>2026-11-02T02:20:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-planes-by-steven-white/sssssbiw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-planes-by-steven-white/sssssbiw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-planes-by-steven-white/sssssbiw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-planes-by-steven-white/sssssbiw"/>
      <lastmod>2026-11-02T10:59:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-planes-by-steven-white/sssssbiw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-planes-by-steven-white/sssssbiw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-planes-by-steven-white/sssssbiw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-planes-by-steven-white/sssssbiw"/>
      <lastmod>2026-11-02T10:59:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explaining-tangent-slope/sssssbi6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explaining-tangent-slope/sssssbi6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explaining-tangent-slope/sssssbi6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explaining-tangent-slope/sssssbi6"/>
      <lastmod>2026-11-02T15:05:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explaining-tangent-slope/sssssbi6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explaining-tangent-slope/sssssbi6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explaining-tangent-slope/sssssbi6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explaining-tangent-slope/sssssbi6"/>
      <lastmod>2026-11-02T15:05:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identifying-parameters-statistics/sssssbig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-parameters-statistics/sssssbig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-parameters-statistics/sssssbig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-parameters-statistics/sssssbig"/>
      <lastmod>2026-11-02T15:29:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identifying-parameters-statistics/sssssbig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-parameters-statistics/sssssbig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-parameters-statistics/sssssbig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-parameters-statistics/sssssbig"/>
      <lastmod>2026-11-02T15:29:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/peculiarities-of-a-circumcircle/sssssbi9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/peculiarities-of-a-circumcircle/sssssbi9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/peculiarities-of-a-circumcircle/sssssbi9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/peculiarities-of-a-circumcircle/sssssbi9"/>
      <lastmod>2026-11-02T16:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/peculiarities-of-a-circumcircle/sssssbi9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/peculiarities-of-a-circumcircle/sssssbi9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/peculiarities-of-a-circumcircle/sssssbi9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/peculiarities-of-a-circumcircle/sssssbi9"/>
      <lastmod>2026-11-02T16:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/classification-of-polygons-interactive-teaching-example/sssssbie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classification-of-polygons-interactive-teaching-example/sssssbie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classification-of-polygons-interactive-teaching-example/sssssbie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classification-of-polygons-interactive-teaching-example/sssssbie"/>
      <lastmod>2026-11-02T18:24:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/classification-of-polygons-interactive-teaching-example/sssssbie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classification-of-polygons-interactive-teaching-example/sssssbie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classification-of-polygons-interactive-teaching-example/sssssbie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classification-of-polygons-interactive-teaching-example/sssssbie"/>
      <lastmod>2026-11-02T18:24:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mechanical-flapping-bird-a-3d-linkage-driven-animation/sssssbiv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mechanical-flapping-bird-a-3d-linkage-driven-animation/sssssbiv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mechanical-flapping-bird-a-3d-linkage-driven-animation/sssssbiv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mechanical-flapping-bird-a-3d-linkage-driven-animation/sssssbiv"/>
      <lastmod>2026-11-01T21:10:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mechanical-flapping-bird-a-3d-linkage-driven-animation/sssssbiv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mechanical-flapping-bird-a-3d-linkage-driven-animation/sssssbiv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mechanical-flapping-bird-a-3d-linkage-driven-animation/sssssbiv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mechanical-flapping-bird-a-3d-linkage-driven-animation/sssssbiv"/>
      <lastmod>2026-11-01T21:10:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/guess-the-orthocenter/sssssbi4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/guess-the-orthocenter/sssssbi4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/guess-the-orthocenter/sssssbi4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/guess-the-orthocenter/sssssbi4"/>
      <lastmod>2026-11-01T20:49:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/guess-the-orthocenter/sssssbi4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/guess-the-orthocenter/sssssbi4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/guess-the-orthocenter/sssssbi4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/guess-the-orthocenter/sssssbi4"/>
      <lastmod>2026-11-01T20:49:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/types-of-brackets-in-inequalities-geogebra-construction-example/sssssbil</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/types-of-brackets-in-inequalities-geogebra-construction-example/sssssbil"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/types-of-brackets-in-inequalities-geogebra-construction-example/sssssbil"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/types-of-brackets-in-inequalities-geogebra-construction-example/sssssbil"/>
      <lastmod>2026-11-02T09:59:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/types-of-brackets-in-inequalities-geogebra-construction-example/sssssbil</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/types-of-brackets-in-inequalities-geogebra-construction-example/sssssbil"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/types-of-brackets-in-inequalities-geogebra-construction-example/sssssbil"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/types-of-brackets-in-inequalities-geogebra-construction-example/sssssbil"/>
      <lastmod>2026-11-02T09:59:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-pyramid-construction-in-3d/sssssbiy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-pyramid-construction-in-3d/sssssbiy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-pyramid-construction-in-3d/sssssbiy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-pyramid-construction-in-3d/sssssbiy"/>
      <lastmod>2026-11-02T15:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-pyramid-construction-in-3d/sssssbiy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-pyramid-construction-in-3d/sssssbiy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-pyramid-construction-in-3d/sssssbiy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-pyramid-construction-in-3d/sssssbiy"/>
      <lastmod>2026-11-02T15:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-solid/sssssbia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-solid/sssssbia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-solid/sssssbia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-solid/sssssbia"/>
      <lastmod>2026-11-02T13:17:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-solid/sssssbia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-solid/sssssbia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-solid/sssssbia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-solid/sssssbia"/>
      <lastmod>2026-11-02T13:17:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/percentage-change-demonstration-by-anthony-or/sssssbic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-change-demonstration-by-anthony-or/sssssbic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-change-demonstration-by-anthony-or/sssssbic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-change-demonstration-by-anthony-or/sssssbic"/>
      <lastmod>2026-11-01T22:02:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/percentage-change-demonstration-by-anthony-or/sssssbic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-change-demonstration-by-anthony-or/sssssbic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-change-demonstration-by-anthony-or/sssssbic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-change-demonstration-by-anthony-or/sssssbic"/>
      <lastmod>2026-11-01T22:02:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-demo/sssssbir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-demo/sssssbir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-isosceles-triangles-demo/sssssbir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-demo/sssssbir"/>
      <lastmod>2026-11-01T21:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-isosceles-triangles-demo/sssssbir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-demo/sssssbir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-isosceles-triangles-demo/sssssbir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-demo/sssssbir"/>
      <lastmod>2026-11-01T21:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-in-the-coordinate-plane-2/sssssbih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-in-the-coordinate-plane-2/sssssbih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-in-the-coordinate-plane-2/sssssbih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-in-the-coordinate-plane-2/sssssbih"/>
      <lastmod>2026-11-02T00:29:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-in-the-coordinate-plane-2/sssssbih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-in-the-coordinate-plane-2/sssssbih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-in-the-coordinate-plane-2/sssssbih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-in-the-coordinate-plane-2/sssssbih"/>
      <lastmod>2026-11-02T00:29:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conditional-probability-interaction-3/sssssbit</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conditional-probability-interaction-3/sssssbit"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conditional-probability-interaction-3/sssssbit"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conditional-probability-interaction-3/sssssbit"/>
      <lastmod>2026-11-02T09:07:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conditional-probability-interaction-3/sssssbit</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conditional-probability-interaction-3/sssssbit"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conditional-probability-interaction-3/sssssbit"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conditional-probability-interaction-3/sssssbit"/>
      <lastmod>2026-11-02T09:07:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/impossible-star/sssssbix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/impossible-star/sssssbix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/impossible-star/sssssbix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/impossible-star/sssssbix"/>
      <lastmod>2026-11-02T16:30:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/impossible-star/sssssbix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/impossible-star/sssssbix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/impossible-star/sssssbix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/impossible-star/sssssbix"/>
      <lastmod>2026-11-02T16:30:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-integral-volume-demo/sssssbii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-integral-volume-demo/sssssbii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-integral-volume-demo/sssssbii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-integral-volume-demo/sssssbii"/>
      <lastmod>2026-11-01T19:25:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-integral-volume-demo/sssssbii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-integral-volume-demo/sssssbii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-integral-volume-demo/sssssbii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-integral-volume-demo/sssssbii"/>
      <lastmod>2026-11-01T19:25:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-critical-points-with-hessian-matrix/sssssbio</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-critical-points-with-hessian-matrix/sssssbio"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-critical-points-with-hessian-matrix/sssssbio"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-critical-points-with-hessian-matrix/sssssbio"/>
      <lastmod>2026-11-01T23:29:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-critical-points-with-hessian-matrix/sssssbio</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-critical-points-with-hessian-matrix/sssssbio"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-critical-points-with-hessian-matrix/sssssbio"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-critical-points-with-hessian-matrix/sssssbio"/>
      <lastmod>2026-11-01T23:29:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-by-ian-cantley-2/sssssbos</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-by-ian-cantley-2/sssssbos"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-by-ian-cantley-2/sssssbos"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-by-ian-cantley-2/sssssbos"/>
      <lastmod>2026-11-02T12:27:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-by-ian-cantley-2/sssssbos</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-by-ian-cantley-2/sssssbos"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-by-ian-cantley-2/sssssbos"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-by-ian-cantley-2/sssssbos"/>
      <lastmod>2026-11-02T12:27:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-prime-numbers/sssssbo7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-prime-numbers/sssssbo7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-prime-numbers/sssssbo7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-prime-numbers/sssssbo7"/>
      <lastmod>2026-11-02T00:21:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-prime-numbers/sssssbo7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-prime-numbers/sssssbo7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-prime-numbers/sssssbo7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-prime-numbers/sssssbo7"/>
      <lastmod>2026-11-02T00:21:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-triangle-construction-task/sssssbon</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangle-construction-task/sssssbon"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangle-construction-task/sssssbon"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangle-construction-task/sssssbon"/>
      <lastmod>2026-11-02T13:57:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-triangle-construction-task/sssssbon</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangle-construction-task/sssssbon"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangle-construction-task/sssssbon"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangle-construction-task/sssssbon"/>
      <lastmod>2026-11-02T13:57:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-volume-of-rotation-from-rectangles-to-cones-and-pyramids/sssssbo2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volume-of-rotation-from-rectangles-to-cones-and-pyramids/sssssbo2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volume-of-rotation-from-rectangles-to-cones-and-pyramids/sssssbo2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volume-of-rotation-from-rectangles-to-cones-and-pyramids/sssssbo2"/>
      <lastmod>2026-11-01T21:44:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-volume-of-rotation-from-rectangles-to-cones-and-pyramids/sssssbo2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volume-of-rotation-from-rectangles-to-cones-and-pyramids/sssssbo2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volume-of-rotation-from-rectangles-to-cones-and-pyramids/sssssbo2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volume-of-rotation-from-rectangles-to-cones-and-pyramids/sssssbo2"/>
      <lastmod>2026-11-01T21:44:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-and-vector-operations/sssssbok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-and-vector-operations/sssssbok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-and-vector-operations/sssssbok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-and-vector-operations/sssssbok"/>
      <lastmod>2026-11-02T12:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-and-vector-operations/sssssbok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-and-vector-operations/sssssbok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-and-vector-operations/sssssbok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-and-vector-operations/sssssbok"/>
      <lastmod>2026-11-02T12:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-x-axis/sssssboz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-x-axis/sssssboz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-x-axis/sssssboz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-x-axis/sssssboz"/>
      <lastmod>2026-11-01T19:36:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-x-axis/sssssboz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-x-axis/sssssboz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-x-axis/sssssboz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-x-axis/sssssboz"/>
      <lastmod>2026-11-01T19:36:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-a-sequence-of-6-terms/sssssbo0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-a-sequence-of-6-terms/sssssbo0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-a-sequence-of-6-terms/sssssbo0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-a-sequence-of-6-terms/sssssbo0"/>
      <lastmod>2026-11-02T02:31:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-a-sequence-of-6-terms/sssssbo0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-a-sequence-of-6-terms/sssssbo0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-a-sequence-of-6-terms/sssssbo0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-a-sequence-of-6-terms/sssssbo0"/>
      <lastmod>2026-11-02T02:31:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/observing-more-patterns-in-scatter-plots/sssssbod</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/observing-more-patterns-in-scatter-plots/sssssbod"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/observing-more-patterns-in-scatter-plots/sssssbod"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/observing-more-patterns-in-scatter-plots/sssssbod"/>
      <lastmod>2026-11-01T20:15:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/observing-more-patterns-in-scatter-plots/sssssbod</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/observing-more-patterns-in-scatter-plots/sssssbod"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/observing-more-patterns-in-scatter-plots/sssssbod"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/observing-more-patterns-in-scatter-plots/sssssbod"/>
      <lastmod>2026-11-01T20:15:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-equations-ii-by-ksiegel16/sssssbof</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-ii-by-ksiegel16/sssssbof"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-ii-by-ksiegel16/sssssbof"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-ii-by-ksiegel16/sssssbof"/>
      <lastmod>2026-11-02T09:27:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-equations-ii-by-ksiegel16/sssssbof</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-ii-by-ksiegel16/sssssbof"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-ii-by-ksiegel16/sssssbof"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-ii-by-ksiegel16/sssssbof"/>
      <lastmod>2026-11-02T09:27:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-coordinates/sssssbo8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-coordinates/sssssbo8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-coordinates/sssssbo8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-coordinates/sssssbo8"/>
      <lastmod>2026-11-01T23:16:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-coordinates/sssssbo8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-coordinates/sssssbo8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-coordinates/sssssbo8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-coordinates/sssssbo8"/>
      <lastmod>2026-11-01T23:16:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-net-11-different-cube-net-models/sssssbou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-net-11-different-cube-net-models/sssssbou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-net-11-different-cube-net-models/sssssbou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-net-11-different-cube-net-models/sssssbou"/>
      <lastmod>2026-11-02T00:41:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-net-11-different-cube-net-models/sssssbou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-net-11-different-cube-net-models/sssssbou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-net-11-different-cube-net-models/sssssbou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-net-11-different-cube-net-models/sssssbou"/>
      <lastmod>2026-11-02T00:41:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sampling-distribution-from-a-normal-distribution/sssssbo5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sampling-distribution-from-a-normal-distribution/sssssbo5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sampling-distribution-from-a-normal-distribution/sssssbo5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sampling-distribution-from-a-normal-distribution/sssssbo5"/>
      <lastmod>2026-11-01T21:44:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sampling-distribution-from-a-normal-distribution/sssssbo5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sampling-distribution-from-a-normal-distribution/sssssbo5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sampling-distribution-from-a-normal-distribution/sssssbo5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sampling-distribution-from-a-normal-distribution/sssssbo5"/>
      <lastmod>2026-11-01T21:44:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-addition-and-multiplication-equations-with-scales/sssssbob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-addition-and-multiplication-equations-with-scales/sssssbob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-addition-and-multiplication-equations-with-scales/sssssbob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-addition-and-multiplication-equations-with-scales/sssssbob"/>
      <lastmod>2026-11-02T13:31:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-addition-and-multiplication-equations-with-scales/sssssbob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-addition-and-multiplication-equations-with-scales/sssssbob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-addition-and-multiplication-equations-with-scales/sssssbob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-addition-and-multiplication-equations-with-scales/sssssbob"/>
      <lastmod>2026-11-02T13:31:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-inequality-theorem-demo/sssssbo3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequality-theorem-demo/sssssbo3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequality-theorem-demo/sssssbo3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequality-theorem-demo/sssssbo3"/>
      <lastmod>2026-11-02T18:48:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-inequality-theorem-demo/sssssbo3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequality-theorem-demo/sssssbo3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequality-theorem-demo/sssssbo3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequality-theorem-demo/sssssbo3"/>
      <lastmod>2026-11-02T18:48:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangles-rhombus-squares/sssssboq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangles-rhombus-squares/sssssboq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangles-rhombus-squares/sssssboq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangles-rhombus-squares/sssssboq"/>
      <lastmod>2026-11-01T21:14:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangles-rhombus-squares/sssssboq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangles-rhombus-squares/sssssboq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangles-rhombus-squares/sssssboq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangles-rhombus-squares/sssssboq"/>
      <lastmod>2026-11-01T21:14:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reciprocal-trig-ratios/sssssbo1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-trig-ratios/sssssbo1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-trig-ratios/sssssbo1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-trig-ratios/sssssbo1"/>
      <lastmod>2026-11-01T23:38:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reciprocal-trig-ratios/sssssbo1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-trig-ratios/sssssbo1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-trig-ratios/sssssbo1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-trig-ratios/sssssbo1"/>
      <lastmod>2026-11-01T23:38:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/designing-an-open-box-from-a-rectangular-cardboard/sssssbom</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/designing-an-open-box-from-a-rectangular-cardboard/sssssbom"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/designing-an-open-box-from-a-rectangular-cardboard/sssssbom"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/designing-an-open-box-from-a-rectangular-cardboard/sssssbom"/>
      <lastmod>2026-11-01T19:35:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/designing-an-open-box-from-a-rectangular-cardboard/sssssbom</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/designing-an-open-box-from-a-rectangular-cardboard/sssssbom"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/designing-an-open-box-from-a-rectangular-cardboard/sssssbom"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/designing-an-open-box-from-a-rectangular-cardboard/sssssbom"/>
      <lastmod>2026-11-01T19:35:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gcd-of-three-numbers/sssssboj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gcd-of-three-numbers/sssssboj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gcd-of-three-numbers/sssssboj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gcd-of-three-numbers/sssssboj"/>
      <lastmod>2026-11-02T09:03:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gcd-of-three-numbers/sssssboj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gcd-of-three-numbers/sssssboj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gcd-of-three-numbers/sssssboj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gcd-of-three-numbers/sssssboj"/>
      <lastmod>2026-11-02T09:03:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-derivative-of-an-implicit-function/sssssbop</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-derivative-of-an-implicit-function/sssssbop"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-derivative-of-an-implicit-function/sssssbop"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-derivative-of-an-implicit-function/sssssbop"/>
      <lastmod>2026-11-02T17:01:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-derivative-of-an-implicit-function/sssssbop</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-derivative-of-an-implicit-function/sssssbop"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-derivative-of-an-implicit-function/sssssbop"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-derivative-of-an-implicit-function/sssssbop"/>
      <lastmod>2026-11-02T17:01:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagram-from-cube/sssssbow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagram-from-cube/sssssbow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagram-from-cube/sssssbow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagram-from-cube/sssssbow"/>
      <lastmod>2026-11-02T14:56:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagram-from-cube/sssssbow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagram-from-cube/sssssbow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagram-from-cube/sssssbow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagram-from-cube/sssssbow"/>
      <lastmod>2026-11-02T14:56:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/affensattel-math-example/sssssbo6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/affensattel-math-example/sssssbo6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/affensattel-math-example/sssssbo6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/affensattel-math-example/sssssbo6"/>
      <lastmod>2026-11-02T02:42:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/affensattel-math-example/sssssbo6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/affensattel-math-example/sssssbo6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/affensattel-math-example/sssssbo6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/affensattel-math-example/sssssbo6"/>
      <lastmod>2026-11-02T02:42:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-perimeter-1-exercise/sssssbog</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-perimeter-1-exercise/sssssbog"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-perimeter-1-exercise/sssssbog"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-perimeter-1-exercise/sssssbog"/>
      <lastmod>2026-11-02T18:46:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-perimeter-1-exercise/sssssbog</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-perimeter-1-exercise/sssssbog"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-perimeter-1-exercise/sssssbog"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-perimeter-1-exercise/sssssbog"/>
      <lastmod>2026-11-02T18:46:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-angle-bisectors-in-a-triangle-with-a-120-degree-angle/sssssbo9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-angle-bisectors-in-a-triangle-with-a-120-degree-angle/sssssbo9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-angle-bisectors-in-a-triangle-with-a-120-degree-angle/sssssbo9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-angle-bisectors-in-a-triangle-with-a-120-degree-angle/sssssbo9"/>
      <lastmod>2026-11-02T18:09:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-angle-bisectors-in-a-triangle-with-a-120-degree-angle/sssssbo9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-angle-bisectors-in-a-triangle-with-a-120-degree-angle/sssssbo9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-angle-bisectors-in-a-triangle-with-a-120-degree-angle/sssssbo9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-angle-bisectors-in-a-triangle-with-a-120-degree-angle/sssssbo9"/>
      <lastmod>2026-11-02T18:09:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-roots-of-unity/sssssboe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-roots-of-unity/sssssboe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-roots-of-unity/sssssboe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-roots-of-unity/sssssboe"/>
      <lastmod>2026-11-02T09:27:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-roots-of-unity/sssssboe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-roots-of-unity/sssssboe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-roots-of-unity/sssssboe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-roots-of-unity/sssssboe"/>
      <lastmod>2026-11-02T09:27:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-arrangement/sssssbov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-arrangement/sssssbov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-arrangement/sssssbov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-arrangement/sssssbov"/>
      <lastmod>2026-11-01T19:37:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-arrangement/sssssbov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-arrangement/sssssbov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-arrangement/sssssbov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-arrangement/sssssbov"/>
      <lastmod>2026-11-01T19:37:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-16-sine-function-and-sphere-scatter-plot/sssssbo4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-16-sine-function-and-sphere-scatter-plot/sssssbo4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-16-sine-function-and-sphere-scatter-plot/sssssbo4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-16-sine-function-and-sphere-scatter-plot/sssssbo4"/>
      <lastmod>2026-11-02T16:59:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-16-sine-function-and-sphere-scatter-plot/sssssbo4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-16-sine-function-and-sphere-scatter-plot/sssssbo4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-16-sine-function-and-sphere-scatter-plot/sssssbo4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-16-sine-function-and-sphere-scatter-plot/sssssbo4"/>
      <lastmod>2026-11-02T16:59:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diy-estimation-multiplication/sssssbol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diy-estimation-multiplication/sssssbol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diy-estimation-multiplication/sssssbol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diy-estimation-multiplication/sssssbol"/>
      <lastmod>2026-11-02T13:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diy-estimation-multiplication/sssssbol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diy-estimation-multiplication/sssssbol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diy-estimation-multiplication/sssssbol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diy-estimation-multiplication/sssssbol"/>
      <lastmod>2026-11-02T13:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-function-example-3/sssssboy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-example-3/sssssboy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-example-3/sssssboy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-example-3/sssssboy"/>
      <lastmod>2026-11-02T17:58:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-function-example-3/sssssboy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-example-3/sssssboy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-example-3/sssssboy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-example-3/sssssboy"/>
      <lastmod>2026-11-02T17:58:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-circles-through-three-random-points/sssssboa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-circles-through-three-random-points/sssssboa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-circles-through-three-random-points/sssssboa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-circles-through-three-random-points/sssssboa"/>
      <lastmod>2026-11-01T20:58:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-circles-through-three-random-points/sssssboa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-circles-through-three-random-points/sssssboa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-circles-through-three-random-points/sssssboa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-circles-through-three-random-points/sssssboa"/>
      <lastmod>2026-11-01T20:58:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/set-theory-and-cube-combinatorics-example/sssssboc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-theory-and-cube-combinatorics-example/sssssboc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-theory-and-cube-combinatorics-example/sssssboc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-theory-and-cube-combinatorics-example/sssssboc"/>
      <lastmod>2026-11-02T16:33:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/set-theory-and-cube-combinatorics-example/sssssboc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-theory-and-cube-combinatorics-example/sssssboc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-theory-and-cube-combinatorics-example/sssssboc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-theory-and-cube-combinatorics-example/sssssboc"/>
      <lastmod>2026-11-02T16:33:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sas-similarity-theorem-exploration-by-kevin-agnew/sssssbor</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-similarity-theorem-exploration-by-kevin-agnew/sssssbor"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-similarity-theorem-exploration-by-kevin-agnew/sssssbor"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-similarity-theorem-exploration-by-kevin-agnew/sssssbor"/>
      <lastmod>2026-11-01T23:38:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sas-similarity-theorem-exploration-by-kevin-agnew/sssssbor</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-similarity-theorem-exploration-by-kevin-agnew/sssssbor"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-similarity-theorem-exploration-by-kevin-agnew/sssssbor"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-similarity-theorem-exploration-by-kevin-agnew/sssssbor"/>
      <lastmod>2026-11-01T23:38:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-1-ssss7sav/sssssboh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-1-ssss7sav/sssssboh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-1-ssss7sav/sssssboh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-1-ssss7sav/sssssboh"/>
      <lastmod>2026-11-02T10:44:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-1-ssss7sav/sssssboh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-1-ssss7sav/sssssboh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-1-ssss7sav/sssssboh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-1-ssss7sav/sssssboh"/>
      <lastmod>2026-11-02T10:44:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-congruent-sides-with-congruent-angle-in-between/sssssbot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-congruent-sides-with-congruent-angle-in-between/sssssbot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-congruent-sides-with-congruent-angle-in-between/sssssbot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-congruent-sides-with-congruent-angle-in-between/sssssbot"/>
      <lastmod>2026-11-02T16:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-congruent-sides-with-congruent-angle-in-between/sssssbot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-congruent-sides-with-congruent-angle-in-between/sssssbot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-congruent-sides-with-congruent-angle-in-between/sssssbot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-congruent-sides-with-congruent-angle-in-between/sssssbot"/>
      <lastmod>2026-11-02T16:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-drone-model-2/sssssbox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-drone-model-2/sssssbox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-drone-model-2/sssssbox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-drone-model-2/sssssbox"/>
      <lastmod>2026-11-01T23:11:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-drone-model-2/sssssbox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-drone-model-2/sssssbox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-drone-model-2/sssssbox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-drone-model-2/sssssbox"/>
      <lastmod>2026-11-01T23:11:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/more-ratio-problems-practice/sssssboi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/more-ratio-problems-practice/sssssboi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/more-ratio-problems-practice/sssssboi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/more-ratio-problems-practice/sssssboi"/>
      <lastmod>2026-11-01T23:07:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/more-ratio-problems-practice/sssssboi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/more-ratio-problems-practice/sssssboi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/more-ratio-problems-practice/sssssboi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/more-ratio-problems-practice/sssssboi"/>
      <lastmod>2026-11-01T23:07:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-histogram-dot-and-stem-leaf-diagrams/sssssboo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-histogram-dot-and-stem-leaf-diagrams/sssssboo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-histogram-dot-and-stem-leaf-diagrams/sssssboo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-histogram-dot-and-stem-leaf-diagrams/sssssboo"/>
      <lastmod>2026-11-01T21:22:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-histogram-dot-and-stem-leaf-diagrams/sssssboo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-histogram-dot-and-stem-leaf-diagrams/sssssboo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-histogram-dot-and-stem-leaf-diagrams/sssssboo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-histogram-dot-and-stem-leaf-diagrams/sssssboo"/>
      <lastmod>2026-11-01T21:22:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-the-caixa-geral-de-dep-sitos-logo/sssss3ss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-caixa-geral-de-dep-sitos-logo/sssss3ss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-caixa-geral-de-dep-sitos-logo/sssss3ss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-caixa-geral-de-dep-sitos-logo/sssss3ss"/>
      <lastmod>2026-11-01T21:05:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-the-caixa-geral-de-dep-sitos-logo/sssss3ss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-caixa-geral-de-dep-sitos-logo/sssss3ss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-caixa-geral-de-dep-sitos-logo/sssss3ss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-caixa-geral-de-dep-sitos-logo/sssss3ss"/>
      <lastmod>2026-11-01T21:05:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculus-mini-quiz-9-the-definite-integral/sssss3s7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculus-mini-quiz-9-the-definite-integral/sssss3s7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculus-mini-quiz-9-the-definite-integral/sssss3s7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculus-mini-quiz-9-the-definite-integral/sssss3s7"/>
      <lastmod>2026-11-02T09:53:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculus-mini-quiz-9-the-definite-integral/sssss3s7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculus-mini-quiz-9-the-definite-integral/sssss3s7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculus-mini-quiz-9-the-definite-integral/sssss3s7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculus-mini-quiz-9-the-definite-integral/sssss3s7"/>
      <lastmod>2026-11-02T09:53:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-sun-pyramid-height/sssss3sn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-sun-pyramid-height/sssss3sn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-sun-pyramid-height/sssss3sn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-sun-pyramid-height/sssss3sn"/>
      <lastmod>2026-11-02T17:48:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-sun-pyramid-height/sssss3sn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-sun-pyramid-height/sssss3sn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-sun-pyramid-height/sssss3sn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-sun-pyramid-height/sssss3sn"/>
      <lastmod>2026-11-02T17:48:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-extension-demonstration/sssss3s2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-extension-demonstration/sssss3s2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-extension-demonstration/sssss3s2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-extension-demonstration/sssss3s2"/>
      <lastmod>2026-11-02T10:53:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-extension-demonstration/sssss3s2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-extension-demonstration/sssss3s2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-extension-demonstration/sssss3s2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-extension-demonstration/sssss3s2"/>
      <lastmod>2026-11-02T10:53:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-and-random-variables-interaction-demo/sssss3sk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-and-random-variables-interaction-demo/sssss3sk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-and-random-variables-interaction-demo/sssss3sk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-and-random-variables-interaction-demo/sssss3sk"/>
      <lastmod>2026-11-02T16:58:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-and-random-variables-interaction-demo/sssss3sk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-and-random-variables-interaction-demo/sssss3sk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-and-random-variables-interaction-demo/sssss3sk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-and-random-variables-interaction-demo/sssss3sk"/>
      <lastmod>2026-11-02T16:58:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-construction-by-jonathan-holland/sssss3sz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-construction-by-jonathan-holland/sssss3sz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-construction-by-jonathan-holland/sssss3sz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-construction-by-jonathan-holland/sssss3sz"/>
      <lastmod>2026-11-02T18:36:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-construction-by-jonathan-holland/sssss3sz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-construction-by-jonathan-holland/sssss3sz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-construction-by-jonathan-holland/sssss3sz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-construction-by-jonathan-holland/sssss3sz"/>
      <lastmod>2026-11-02T18:36:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/energy-diagrams-6/sssss3s0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-diagrams-6/sssss3s0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-diagrams-6/sssss3s0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-diagrams-6/sssss3s0"/>
      <lastmod>2026-11-02T16:34:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/energy-diagrams-6/sssss3s0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-diagrams-6/sssss3s0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-diagrams-6/sssss3s0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-diagrams-6/sssss3s0"/>
      <lastmod>2026-11-02T16:34:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-double-cone-1/sssss3sd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-double-cone-1/sssss3sd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-double-cone-1/sssss3sd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-double-cone-1/sssss3sd"/>
      <lastmod>2026-11-01T19:30:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-double-cone-1/sssss3sd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-double-cone-1/sssss3sd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-double-cone-1/sssss3sd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-double-cone-1/sssss3sd"/>
      <lastmod>2026-11-01T19:30:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-2-5-practice-defining-equivalent-ratios/sssss3sf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-2-5-practice-defining-equivalent-ratios/sssss3sf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-2-5-practice-defining-equivalent-ratios/sssss3sf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-2-5-practice-defining-equivalent-ratios/sssss3sf"/>
      <lastmod>2026-11-01T23:00:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-2-5-practice-defining-equivalent-ratios/sssss3sf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-2-5-practice-defining-equivalent-ratios/sssss3sf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-2-5-practice-defining-equivalent-ratios/sssss3sf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-2-5-practice-defining-equivalent-ratios/sssss3sf"/>
      <lastmod>2026-11-01T23:00:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-and-polygon-intersection-demo/sssss3s8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-polygon-intersection-demo/sssss3s8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-polygon-intersection-demo/sssss3s8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-polygon-intersection-demo/sssss3s8"/>
      <lastmod>2026-11-02T18:54:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-and-polygon-intersection-demo/sssss3s8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-polygon-intersection-demo/sssss3s8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-polygon-intersection-demo/sssss3s8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-polygon-intersection-demo/sssss3s8"/>
      <lastmod>2026-11-02T18:54:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squared-rectangle-2/sssss3su</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squared-rectangle-2/sssss3su"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squared-rectangle-2/sssss3su"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squared-rectangle-2/sssss3su"/>
      <lastmod>2026-11-02T08:30:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/squared-rectangle-2/sssss3su</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squared-rectangle-2/sssss3su"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squared-rectangle-2/sssss3su"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squared-rectangle-2/sssss3su"/>
      <lastmod>2026-11-02T08:30:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-linear-equation-parameters/sssss3s5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-linear-equation-parameters/sssss3s5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-linear-equation-parameters/sssss3s5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-linear-equation-parameters/sssss3s5"/>
      <lastmod>2026-11-01T21:58:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-linear-equation-parameters/sssss3s5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-linear-equation-parameters/sssss3s5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-linear-equation-parameters/sssss3s5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-linear-equation-parameters/sssss3s5"/>
      <lastmod>2026-11-01T21:58:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-rectangle-and-square-lab/sssss3sb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-rectangle-and-square-lab/sssss3sb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-rectangle-and-square-lab/sssss3sb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-rectangle-and-square-lab/sssss3sb"/>
      <lastmod>2026-11-01T21:10:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-rectangle-and-square-lab/sssss3sb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-rectangle-and-square-lab/sssss3sb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-rectangle-and-square-lab/sssss3sb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-rectangle-and-square-lab/sssss3sb"/>
      <lastmod>2026-11-01T21:10:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modifiable-solid-with-equilateral-triangle-cross-sections-parallel-to-yaxis/sssss3s3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-with-equilateral-triangle-cross-sections-parallel-to-yaxis/sssss3s3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-with-equilateral-triangle-cross-sections-parallel-to-yaxis/sssss3s3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-with-equilateral-triangle-cross-sections-parallel-to-yaxis/sssss3s3"/>
      <lastmod>2026-11-01T23:33:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modifiable-solid-with-equilateral-triangle-cross-sections-parallel-to-yaxis/sssss3s3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-with-equilateral-triangle-cross-sections-parallel-to-yaxis/sssss3s3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-with-equilateral-triangle-cross-sections-parallel-to-yaxis/sssss3s3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-with-equilateral-triangle-cross-sections-parallel-to-yaxis/sssss3s3"/>
      <lastmod>2026-11-01T23:33:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dot-product-of-two-vectors-by-gary-rubinstein/sssss3sq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dot-product-of-two-vectors-by-gary-rubinstein/sssss3sq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dot-product-of-two-vectors-by-gary-rubinstein/sssss3sq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dot-product-of-two-vectors-by-gary-rubinstein/sssss3sq"/>
      <lastmod>2026-11-02T00:01:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dot-product-of-two-vectors-by-gary-rubinstein/sssss3sq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dot-product-of-two-vectors-by-gary-rubinstein/sssss3sq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dot-product-of-two-vectors-by-gary-rubinstein/sssss3sq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dot-product-of-two-vectors-by-gary-rubinstein/sssss3sq"/>
      <lastmod>2026-11-02T00:01:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-growth-modeling-solving-linear-systems-by-graphing/sssss3s1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-growth-modeling-solving-linear-systems-by-graphing/sssss3s1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-growth-modeling-solving-linear-systems-by-graphing/sssss3s1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-growth-modeling-solving-linear-systems-by-graphing/sssss3s1"/>
      <lastmod>2026-11-01T21:41:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-growth-modeling-solving-linear-systems-by-graphing/sssss3s1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-growth-modeling-solving-linear-systems-by-graphing/sssss3s1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-growth-modeling-solving-linear-systems-by-graphing/sssss3s1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-growth-modeling-solving-linear-systems-by-graphing/sssss3s1"/>
      <lastmod>2026-11-01T21:41:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-slope-from-a-slope-triangle/sssss3sm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-slope-from-a-slope-triangle/sssss3sm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-slope-from-a-slope-triangle/sssss3sm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-slope-from-a-slope-triangle/sssss3sm"/>
      <lastmod>2026-11-02T17:02:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-slope-from-a-slope-triangle/sssss3sm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-slope-from-a-slope-triangle/sssss3sm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-slope-from-a-slope-triangle/sssss3sm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-slope-from-a-slope-triangle/sssss3sm"/>
      <lastmod>2026-11-02T17:02:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-fractions-visualization-bar-models-with-random-practice/sssss3sj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-visualization-bar-models-with-random-practice/sssss3sj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-visualization-bar-models-with-random-practice/sssss3sj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-visualization-bar-models-with-random-practice/sssss3sj"/>
      <lastmod>2026-11-01T21:51:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-fractions-visualization-bar-models-with-random-practice/sssss3sj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-visualization-bar-models-with-random-practice/sssss3sj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-visualization-bar-models-with-random-practice/sssss3sj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-visualization-bar-models-with-random-practice/sssss3sj"/>
      <lastmod>2026-11-01T21:51:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/optimization-rectangle-under-parabola/sssss3sp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-rectangle-under-parabola/sssss3sp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-rectangle-under-parabola/sssss3sp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-rectangle-under-parabola/sssss3sp"/>
      <lastmod>2026-11-02T08:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/optimization-rectangle-under-parabola/sssss3sp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-rectangle-under-parabola/sssss3sp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-rectangle-under-parabola/sssss3sp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-rectangle-under-parabola/sssss3sp"/>
      <lastmod>2026-11-02T08:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-nature-of-roots/sssss3sw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-nature-of-roots/sssss3sw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-nature-of-roots/sssss3sw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-nature-of-roots/sssss3sw"/>
      <lastmod>2026-11-02T18:52:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-nature-of-roots/sssss3sw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-nature-of-roots/sssss3sw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-nature-of-roots/sssss3sw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-nature-of-roots/sssss3sw"/>
      <lastmod>2026-11-02T18:52:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-formed-by-rotating-area-between-two-functions/sssss3s6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-formed-by-rotating-area-between-two-functions/sssss3s6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-formed-by-rotating-area-between-two-functions/sssss3s6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-formed-by-rotating-area-between-two-functions/sssss3s6"/>
      <lastmod>2026-11-02T09:55:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-formed-by-rotating-area-between-two-functions/sssss3s6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-formed-by-rotating-area-between-two-functions/sssss3s6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-formed-by-rotating-area-between-two-functions/sssss3s6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-formed-by-rotating-area-between-two-functions/sssss3s6"/>
      <lastmod>2026-11-02T09:55:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-proof-of-incenters-in-isosceles-triangle-divided-by-cevian/sssss3sg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-incenters-in-isosceles-triangle-divided-by-cevian/sssss3sg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-incenters-in-isosceles-triangle-divided-by-cevian/sssss3sg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-incenters-in-isosceles-triangle-divided-by-cevian/sssss3sg"/>
      <lastmod>2026-11-02T18:36:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-proof-of-incenters-in-isosceles-triangle-divided-by-cevian/sssss3sg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-incenters-in-isosceles-triangle-divided-by-cevian/sssss3sg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-incenters-in-isosceles-triangle-divided-by-cevian/sssss3sg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-incenters-in-isosceles-triangle-divided-by-cevian/sssss3sg"/>
      <lastmod>2026-11-02T18:36:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-5-6-lesson-methods-for-multiplying-decimals/sssss3s9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-5-6-lesson-methods-for-multiplying-decimals/sssss3s9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-5-6-lesson-methods-for-multiplying-decimals/sssss3s9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-5-6-lesson-methods-for-multiplying-decimals/sssss3s9"/>
      <lastmod>2026-11-01T20:25:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-5-6-lesson-methods-for-multiplying-decimals/sssss3s9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-5-6-lesson-methods-for-multiplying-decimals/sssss3s9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-5-6-lesson-methods-for-multiplying-decimals/sssss3s9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-5-6-lesson-methods-for-multiplying-decimals/sssss3s9"/>
      <lastmod>2026-11-01T20:25:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/length-of-the-path-on-a-rectangular-grid/sssss3se</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/length-of-the-path-on-a-rectangular-grid/sssss3se"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/length-of-the-path-on-a-rectangular-grid/sssss3se"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/length-of-the-path-on-a-rectangular-grid/sssss3se"/>
      <lastmod>2026-11-01T20:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/length-of-the-path-on-a-rectangular-grid/sssss3se</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/length-of-the-path-on-a-rectangular-grid/sssss3se"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/length-of-the-path-on-a-rectangular-grid/sssss3se"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/length-of-the-path-on-a-rectangular-grid/sssss3se"/>
      <lastmod>2026-11-01T20:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-construction-sas-case/sssss3sv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-construction-sas-case/sssss3sv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-construction-sas-case/sssss3sv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-construction-sas-case/sssss3sv"/>
      <lastmod>2026-11-01T21:27:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-construction-sas-case/sssss3sv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-construction-sas-case/sssss3sv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-construction-sas-case/sssss3sv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-construction-sas-case/sssss3sv"/>
      <lastmod>2026-11-01T21:27:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-roxana-kim/sssss3s4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-roxana-kim/sssss3s4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-roxana-kim/sssss3s4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-roxana-kim/sssss3s4"/>
      <lastmod>2026-11-02T12:45:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-roxana-kim/sssss3s4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-roxana-kim/sssss3s4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-roxana-kim/sssss3s4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-roxana-kim/sssss3s4"/>
      <lastmod>2026-11-02T12:45:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/no-solution-2-visualizing-cube-volume-definite-integral-and-expected-value/sssss3sl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/no-solution-2-visualizing-cube-volume-definite-integral-and-expected-value/sssss3sl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/no-solution-2-visualizing-cube-volume-definite-integral-and-expected-value/sssss3sl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/no-solution-2-visualizing-cube-volume-definite-integral-and-expected-value/sssss3sl"/>
      <lastmod>2026-11-02T18:36:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/no-solution-2-visualizing-cube-volume-definite-integral-and-expected-value/sssss3sl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/no-solution-2-visualizing-cube-volume-definite-integral-and-expected-value/sssss3sl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/no-solution-2-visualizing-cube-volume-definite-integral-and-expected-value/sssss3sl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/no-solution-2-visualizing-cube-volume-definite-integral-and-expected-value/sssss3sl"/>
      <lastmod>2026-11-02T18:36:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-calculator/sssss3sy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-calculator/sssss3sy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-calculator/sssss3sy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-calculator/sssss3sy"/>
      <lastmod>2026-11-01T21:34:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-calculator/sssss3sy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-calculator/sssss3sy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-calculator/sssss3sy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-calculator/sssss3sy"/>
      <lastmod>2026-11-01T21:34:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sketching-second-derivatives-by-d-jayaseelan/sssss3sa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketching-second-derivatives-by-d-jayaseelan/sssss3sa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketching-second-derivatives-by-d-jayaseelan/sssss3sa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketching-second-derivatives-by-d-jayaseelan/sssss3sa"/>
      <lastmod>2026-11-02T18:02:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sketching-second-derivatives-by-d-jayaseelan/sssss3sa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketching-second-derivatives-by-d-jayaseelan/sssss3sa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketching-second-derivatives-by-d-jayaseelan/sssss3sa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketching-second-derivatives-by-d-jayaseelan/sssss3sa"/>
      <lastmod>2026-11-02T18:02:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-equations-and-roots-of-parabolas/sssss3sc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-equations-and-roots-of-parabolas/sssss3sc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-equations-and-roots-of-parabolas/sssss3sc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-equations-and-roots-of-parabolas/sssss3sc"/>
      <lastmod>2026-11-02T15:48:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-equations-and-roots-of-parabolas/sssss3sc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-equations-and-roots-of-parabolas/sssss3sc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-equations-and-roots-of-parabolas/sssss3sc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-equations-and-roots-of-parabolas/sssss3sc"/>
      <lastmod>2026-11-02T15:48:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-subtraction-demo/sssss3sr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-subtraction-demo/sssss3sr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-subtraction-demo/sssss3sr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-subtraction-demo/sssss3sr"/>
      <lastmod>2026-11-02T17:01:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-subtraction-demo/sssss3sr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-subtraction-demo/sssss3sr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-subtraction-demo/sssss3sr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-subtraction-demo/sssss3sr"/>
      <lastmod>2026-11-02T17:01:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-line-pantograph/sssss3sh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-line-pantograph/sssss3sh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-line-pantograph/sssss3sh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-line-pantograph/sssss3sh"/>
      <lastmod>2026-11-02T02:32:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-line-pantograph/sssss3sh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-line-pantograph/sssss3sh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-line-pantograph/sssss3sh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-line-pantograph/sssss3sh"/>
      <lastmod>2026-11-02T02:32:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/energy-diagrams-4/sssss3st</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-diagrams-4/sssss3st"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-diagrams-4/sssss3st"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-diagrams-4/sssss3st"/>
      <lastmod>2026-11-01T23:57:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/energy-diagrams-4/sssss3st</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-diagrams-4/sssss3st"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-diagrams-4/sssss3st"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-diagrams-4/sssss3st"/>
      <lastmod>2026-11-01T23:57:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-5-random-triangle-and-vector-quadrilateral-exploration/sssss3sx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-5-random-triangle-and-vector-quadrilateral-exploration/sssss3sx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-5-random-triangle-and-vector-quadrilateral-exploration/sssss3sx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-5-random-triangle-and-vector-quadrilateral-exploration/sssss3sx"/>
      <lastmod>2026-11-02T18:08:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-5-random-triangle-and-vector-quadrilateral-exploration/sssss3sx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-5-random-triangle-and-vector-quadrilateral-exploration/sssss3sx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-5-random-triangle-and-vector-quadrilateral-exploration/sssss3sx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-5-random-triangle-and-vector-quadrilateral-exploration/sssss3sx"/>
      <lastmod>2026-11-02T18:08:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-and-non-linear-equations-demo/sssss3si</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-and-non-linear-equations-demo/sssss3si"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-and-non-linear-equations-demo/sssss3si"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-and-non-linear-equations-demo/sssss3si"/>
      <lastmod>2026-11-01T23:37:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-and-non-linear-equations-demo/sssss3si</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-and-non-linear-equations-demo/sssss3si"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-and-non-linear-equations-demo/sssss3si"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-and-non-linear-equations-demo/sssss3si"/>
      <lastmod>2026-11-01T23:37:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-by-jesus-perez/sssss3so</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-jesus-perez/sssss3so"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-by-jesus-perez/sssss3so"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-jesus-perez/sssss3so"/>
      <lastmod>2026-11-02T18:27:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-by-jesus-perez/sssss3so</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-jesus-perez/sssss3so"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-by-jesus-perez/sssss3so"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-jesus-perez/sssss3so"/>
      <lastmod>2026-11-02T18:27:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-sum-demonstration/sssss37s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-sum-demonstration/sssss37s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-sum-demonstration/sssss37s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-sum-demonstration/sssss37s"/>
      <lastmod>2026-11-01T21:35:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-sum-demonstration/sssss37s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-sum-demonstration/sssss37s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-sum-demonstration/sssss37s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-sum-demonstration/sssss37s"/>
      <lastmod>2026-11-01T21:35:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-2/sssss377</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-2/sssss377"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dr-fisher-s-exponents-game-level-2/sssss377"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-2/sssss377"/>
      <lastmod>2026-11-02T02:18:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dr-fisher-s-exponents-game-level-2/sssss377</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-2/sssss377"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dr-fisher-s-exponents-game-level-2/sssss377"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-2/sssss377"/>
      <lastmod>2026-11-02T02:18:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/expected-value-and-geometry-interaction-demo/sssss37n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expected-value-and-geometry-interaction-demo/sssss37n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expected-value-and-geometry-interaction-demo/sssss37n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expected-value-and-geometry-interaction-demo/sssss37n"/>
      <lastmod>2026-11-01T23:18:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/expected-value-and-geometry-interaction-demo/sssss37n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expected-value-and-geometry-interaction-demo/sssss37n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expected-value-and-geometry-interaction-demo/sssss37n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expected-value-and-geometry-interaction-demo/sssss37n"/>
      <lastmod>2026-11-01T23:18:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-function-bounding-box/sssss372</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-bounding-box/sssss372"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-bounding-box/sssss372"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-bounding-box/sssss372"/>
      <lastmod>2026-11-02T07:31:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-function-bounding-box/sssss372</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-bounding-box/sssss372"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-bounding-box/sssss372"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-bounding-box/sssss372"/>
      <lastmod>2026-11-02T07:31:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-lowest-terms-dynamic-demonstration/sssss37k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-lowest-terms-dynamic-demonstration/sssss37k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-lowest-terms-dynamic-demonstration/sssss37k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-lowest-terms-dynamic-demonstration/sssss37k"/>
      <lastmod>2026-11-02T12:49:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-lowest-terms-dynamic-demonstration/sssss37k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-lowest-terms-dynamic-demonstration/sssss37k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-lowest-terms-dynamic-demonstration/sssss37k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-lowest-terms-dynamic-demonstration/sssss37k"/>
      <lastmod>2026-11-02T12:49:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-demo-by-bernat/sssss37z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-demo-by-bernat/sssss37z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-demo-by-bernat/sssss37z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-demo-by-bernat/sssss37z"/>
      <lastmod>2026-11-01T23:41:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-demo-by-bernat/sssss37z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-demo-by-bernat/sssss37z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-demo-by-bernat/sssss37z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-demo-by-bernat/sssss37z"/>
      <lastmod>2026-11-01T23:41:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-block-minecraft-demo/sssss370</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-block-minecraft-demo/sssss370"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-block-minecraft-demo/sssss370"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-block-minecraft-demo/sssss370"/>
      <lastmod>2026-11-02T12:44:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-block-minecraft-demo/sssss370</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-block-minecraft-demo/sssss370"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-block-minecraft-demo/sssss370"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-block-minecraft-demo/sssss370"/>
      <lastmod>2026-11-02T12:44:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-at-two-points/sssss37d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-at-two-points/sssss37d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-at-two-points/sssss37d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-at-two-points/sssss37d"/>
      <lastmod>2026-11-02T16:43:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-at-two-points/sssss37d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-at-two-points/sssss37d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-at-two-points/sssss37d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-at-two-points/sssss37d"/>
      <lastmod>2026-11-02T16:43:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/charged-spheres/sssss37f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/charged-spheres/sssss37f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/charged-spheres/sssss37f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/charged-spheres/sssss37f"/>
      <lastmod>2026-11-02T02:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/charged-spheres/sssss37f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/charged-spheres/sssss37f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/charged-spheres/sssss37f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/charged-spheres/sssss37f"/>
      <lastmod>2026-11-02T02:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-4-demonstrates-geometric-construction-of-seg/sssss378</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-4-demonstrates-geometric-construction-of-seg/sssss378"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-problem-4-demonstrates-geometric-construction-of-seg/sssss378"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-4-demonstrates-geometric-construction-of-seg/sssss378"/>
      <lastmod>2026-11-02T00:55:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/segment-addition-postulate-problem-4-demonstrates-geometric-construction-of-seg/sssss378</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-4-demonstrates-geometric-construction-of-seg/sssss378"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-problem-4-demonstrates-geometric-construction-of-seg/sssss378"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-4-demonstrates-geometric-construction-of-seg/sssss378"/>
      <lastmod>2026-11-02T00:55:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-negative-numbers-escape-room-challenge/sssss37u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-negative-numbers-escape-room-challenge/sssss37u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-negative-numbers-escape-room-challenge/sssss37u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-negative-numbers-escape-room-challenge/sssss37u"/>
      <lastmod>2026-11-01T23:22:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-negative-numbers-escape-room-challenge/sssss37u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-negative-numbers-escape-room-challenge/sssss37u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-negative-numbers-escape-room-challenge/sssss37u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-negative-numbers-escape-room-challenge/sssss37u"/>
      <lastmod>2026-11-01T23:22:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/determine-if-a-decimal-is-repeating/sssss375</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determine-if-a-decimal-is-repeating/sssss375"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determine-if-a-decimal-is-repeating/sssss375"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determine-if-a-decimal-is-repeating/sssss375"/>
      <lastmod>2026-11-02T17:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/determine-if-a-decimal-is-repeating/sssss375</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determine-if-a-decimal-is-repeating/sssss375"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determine-if-a-decimal-is-repeating/sssss375"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determine-if-a-decimal-is-repeating/sssss375"/>
      <lastmod>2026-11-02T17:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphs-of-common-probability-distributions/sssss37b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-common-probability-distributions/sssss37b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-common-probability-distributions/sssss37b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-common-probability-distributions/sssss37b"/>
      <lastmod>2026-11-01T20:59:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphs-of-common-probability-distributions/sssss37b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-common-probability-distributions/sssss37b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-common-probability-distributions/sssss37b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-common-probability-distributions/sssss37b"/>
      <lastmod>2026-11-01T20:59:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-and-net-of-a-cuboid/sssss373</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-and-net-of-a-cuboid/sssss373"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-and-net-of-a-cuboid/sssss373"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-and-net-of-a-cuboid/sssss373"/>
      <lastmod>2026-11-02T14:55:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-and-net-of-a-cuboid/sssss373</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-and-net-of-a-cuboid/sssss373"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-and-net-of-a-cuboid/sssss373"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-and-net-of-a-cuboid/sssss373"/>
      <lastmod>2026-11-02T14:55:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-case-where-the-second-derivative-test-fails/sssss37q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-case-where-the-second-derivative-test-fails/sssss37q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-case-where-the-second-derivative-test-fails/sssss37q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-case-where-the-second-derivative-test-fails/sssss37q"/>
      <lastmod>2026-11-02T11:05:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-case-where-the-second-derivative-test-fails/sssss37q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-case-where-the-second-derivative-test-fails/sssss37q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-case-where-the-second-derivative-test-fails/sssss37q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-case-where-the-second-derivative-test-fails/sssss37q"/>
      <lastmod>2026-11-02T11:05:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curve-and-surface-matching-game-review/sssss371</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-and-surface-matching-game-review/sssss371"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-and-surface-matching-game-review/sssss371"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-and-surface-matching-game-review/sssss371"/>
      <lastmod>2026-11-02T02:27:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curve-and-surface-matching-game-review/sssss371</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-and-surface-matching-game-review/sssss371"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-and-surface-matching-game-review/sssss371"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-and-surface-matching-game-review/sssss371"/>
      <lastmod>2026-11-02T02:27:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/straight-line-graph-example/sssss37m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/straight-line-graph-example/sssss37m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/straight-line-graph-example/sssss37m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/straight-line-graph-example/sssss37m"/>
      <lastmod>2026-11-01T19:16:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/straight-line-graph-example/sssss37m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/straight-line-graph-example/sssss37m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/straight-line-graph-example/sssss37m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/straight-line-graph-example/sssss37m"/>
      <lastmod>2026-11-01T19:16:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-linear-equations-by-sangeeta-gulati/sssss37j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-linear-equations-by-sangeeta-gulati/sssss37j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-linear-equations-by-sangeeta-gulati/sssss37j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-linear-equations-by-sangeeta-gulati/sssss37j"/>
      <lastmod>2026-11-02T17:59:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-linear-equations-by-sangeeta-gulati/sssss37j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-linear-equations-by-sangeeta-gulati/sssss37j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-linear-equations-by-sangeeta-gulati/sssss37j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-linear-equations-by-sangeeta-gulati/sssss37j"/>
      <lastmod>2026-11-02T17:59:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-the-missing-supplementary-angle/sssss37p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-missing-supplementary-angle/sssss37p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-missing-supplementary-angle/sssss37p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-missing-supplementary-angle/sssss37p"/>
      <lastmod>2026-11-01T19:31:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-the-missing-supplementary-angle/sssss37p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-missing-supplementary-angle/sssss37p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-missing-supplementary-angle/sssss37p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-missing-supplementary-angle/sssss37p"/>
      <lastmod>2026-11-01T19:31:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-upper-and-lower-sums-riemann-sum-by-martin-flashman/sssss37w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-upper-and-lower-sums-riemann-sum-by-martin-flashman/sssss37w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-upper-and-lower-sums-riemann-sum-by-martin-flashman/sssss37w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-upper-and-lower-sums-riemann-sum-by-martin-flashman/sssss37w"/>
      <lastmod>2026-11-02T17:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-upper-and-lower-sums-riemann-sum-by-martin-flashman/sssss37w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-upper-and-lower-sums-riemann-sum-by-martin-flashman/sssss37w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-upper-and-lower-sums-riemann-sum-by-martin-flashman/sssss37w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-upper-and-lower-sums-riemann-sum-by-martin-flashman/sssss37w"/>
      <lastmod>2026-11-02T17:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-standard-equation-and-focus-properties/sssss376</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-standard-equation-and-focus-properties/sssss376"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-standard-equation-and-focus-properties/sssss376"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-standard-equation-and-focus-properties/sssss376"/>
      <lastmod>2026-11-02T08:32:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-standard-equation-and-focus-properties/sssss376</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-standard-equation-and-focus-properties/sssss376"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-standard-equation-and-focus-properties/sssss376"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-standard-equation-and-focus-properties/sssss376"/>
      <lastmod>2026-11-02T08:32:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/icosahedron-demo/sssss37g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedron-demo/sssss37g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedron-demo/sssss37g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedron-demo/sssss37g"/>
      <lastmod>2026-11-01T23:16:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/icosahedron-demo/sssss37g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedron-demo/sssss37g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedron-demo/sssss37g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedron-demo/sssss37g"/>
      <lastmod>2026-11-01T23:16:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtraction-quiz-level-1/sssss379</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-quiz-level-1/sssss379"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-quiz-level-1/sssss379"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-quiz-level-1/sssss379"/>
      <lastmod>2026-11-02T18:03:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtraction-quiz-level-1/sssss379</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-quiz-level-1/sssss379"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-quiz-level-1/sssss379"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-quiz-level-1/sssss379"/>
      <lastmod>2026-11-02T18:03:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-vs-cylinder-volume-comparison/sssss37e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-vs-cylinder-volume-comparison/sssss37e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-vs-cylinder-volume-comparison/sssss37e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-vs-cylinder-volume-comparison/sssss37e"/>
      <lastmod>2026-11-01T23:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-vs-cylinder-volume-comparison/sssss37e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-vs-cylinder-volume-comparison/sssss37e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-vs-cylinder-volume-comparison/sssss37e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-vs-cylinder-volume-comparison/sssss37e"/>
      <lastmod>2026-11-01T23:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-pythagorean-theorem-demo/sssss37v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-pythagorean-theorem-demo/sssss37v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-pythagorean-theorem-demo/sssss37v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-pythagorean-theorem-demo/sssss37v"/>
      <lastmod>2026-11-02T13:29:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-pythagorean-theorem-demo/sssss37v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-pythagorean-theorem-demo/sssss37v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-pythagorean-theorem-demo/sssss37v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-pythagorean-theorem-demo/sssss37v"/>
      <lastmod>2026-11-02T13:29:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/critical-points-of-the-function-surface-of-the-eight-point-model/sssss374</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/critical-points-of-the-function-surface-of-the-eight-point-model/sssss374"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/critical-points-of-the-function-surface-of-the-eight-point-model/sssss374"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/critical-points-of-the-function-surface-of-the-eight-point-model/sssss374"/>
      <lastmod>2026-11-02T09:34:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/critical-points-of-the-function-surface-of-the-eight-point-model/sssss374</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/critical-points-of-the-function-surface-of-the-eight-point-model/sssss374"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/critical-points-of-the-function-surface-of-the-eight-point-model/sssss374"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/critical-points-of-the-function-surface-of-the-eight-point-model/sssss374"/>
      <lastmod>2026-11-02T09:34:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-demonstration-of-adding-and-subtracting-integers/sssss37l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-demonstration-of-adding-and-subtracting-integers/sssss37l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-demonstration-of-adding-and-subtracting-integers/sssss37l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-demonstration-of-adding-and-subtracting-integers/sssss37l"/>
      <lastmod>2026-11-01T20:42:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-demonstration-of-adding-and-subtracting-integers/sssss37l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-demonstration-of-adding-and-subtracting-integers/sssss37l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-demonstration-of-adding-and-subtracting-integers/sssss37l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-demonstration-of-adding-and-subtracting-integers/sssss37l"/>
      <lastmod>2026-11-01T20:42:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-sine-and-cosine-ratios-on-the-unit-circle/sssss37y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-sine-and-cosine-ratios-on-the-unit-circle/sssss37y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-sine-and-cosine-ratios-on-the-unit-circle/sssss37y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-sine-and-cosine-ratios-on-the-unit-circle/sssss37y"/>
      <lastmod>2026-11-01T23:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-sine-and-cosine-ratios-on-the-unit-circle/sssss37y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-sine-and-cosine-ratios-on-the-unit-circle/sssss37y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-sine-and-cosine-ratios-on-the-unit-circle/sssss37y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-sine-and-cosine-ratios-on-the-unit-circle/sssss37y"/>
      <lastmod>2026-11-01T23:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/understanding-multiplication-and-division/sssss37a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-multiplication-and-division/sssss37a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-multiplication-and-division/sssss37a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-multiplication-and-division/sssss37a"/>
      <lastmod>2026-11-02T18:50:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/understanding-multiplication-and-division/sssss37a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-multiplication-and-division/sssss37a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-multiplication-and-division/sssss37a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-multiplication-and-division/sssss37a"/>
      <lastmod>2026-11-02T18:50:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-construction-example-by-gocemenbusra/sssss37c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-construction-example-by-gocemenbusra/sssss37c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-construction-example-by-gocemenbusra/sssss37c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-construction-example-by-gocemenbusra/sssss37c"/>
      <lastmod>2026-11-02T17:40:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-construction-example-by-gocemenbusra/sssss37c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-construction-example-by-gocemenbusra/sssss37c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-construction-example-by-gocemenbusra/sssss37c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-construction-example-by-gocemenbusra/sssss37c"/>
      <lastmod>2026-11-02T17:40:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-properties-exploration/sssss37r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-properties-exploration/sssss37r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-properties-exploration/sssss37r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-properties-exploration/sssss37r"/>
      <lastmod>2026-11-02T00:16:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-properties-exploration/sssss37r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-properties-exploration/sssss37r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-properties-exploration/sssss37r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-properties-exploration/sssss37r"/>
      <lastmod>2026-11-02T00:16:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-plane-orientation-in-geogebra/sssss37h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-plane-orientation-in-geogebra/sssss37h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-plane-orientation-in-geogebra/sssss37h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-plane-orientation-in-geogebra/sssss37h"/>
      <lastmod>2026-11-02T16:42:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-plane-orientation-in-geogebra/sssss37h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-plane-orientation-in-geogebra/sssss37h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-plane-orientation-in-geogebra/sssss37h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-plane-orientation-in-geogebra/sssss37h"/>
      <lastmod>2026-11-02T16:42:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-practice/sssss37t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-practice/sssss37t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-practice/sssss37t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-practice/sssss37t"/>
      <lastmod>2026-11-01T21:08:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-practice/sssss37t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-practice/sssss37t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-practice/sssss37t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-practice/sssss37t"/>
      <lastmod>2026-11-01T21:08:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-lines/sssss37x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines/sssss37x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines/sssss37x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines/sssss37x"/>
      <lastmod>2026-11-01T22:10:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-lines/sssss37x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines/sssss37x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines/sssss37x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines/sssss37x"/>
      <lastmod>2026-11-01T22:10:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-unit-fractions/sssss37i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-unit-fractions/sssss37i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-unit-fractions/sssss37i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-unit-fractions/sssss37i"/>
      <lastmod>2026-11-02T18:42:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-unit-fractions/sssss37i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-unit-fractions/sssss37i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-unit-fractions/sssss37i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-unit-fractions/sssss37i"/>
      <lastmod>2026-11-02T18:42:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parkland-puzzle-5/sssss37o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parkland-puzzle-5/sssss37o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parkland-puzzle-5/sssss37o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parkland-puzzle-5/sssss37o"/>
      <lastmod>2026-11-01T21:51:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parkland-puzzle-5/sssss37o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parkland-puzzle-5/sssss37o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parkland-puzzle-5/sssss37o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parkland-puzzle-5/sssss37o"/>
      <lastmod>2026-11-01T21:51:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/check-the-formula/sssss3ns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-the-formula/sssss3ns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-the-formula/sssss3ns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-the-formula/sssss3ns"/>
      <lastmod>2026-11-01T23:42:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/check-the-formula/sssss3ns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-the-formula/sssss3ns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-the-formula/sssss3ns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-the-formula/sssss3ns"/>
      <lastmod>2026-11-01T23:42:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-over-linear-rational-functions/sssss3n7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-over-linear-rational-functions/sssss3n7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-over-linear-rational-functions/sssss3n7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-over-linear-rational-functions/sssss3n7"/>
      <lastmod>2026-11-02T06:49:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-over-linear-rational-functions/sssss3n7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-over-linear-rational-functions/sssss3n7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-over-linear-rational-functions/sssss3n7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-over-linear-rational-functions/sssss3n7"/>
      <lastmod>2026-11-02T06:49:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-pi-estimation/sssss3nn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-pi-estimation/sssss3nn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-pi-estimation/sssss3nn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-pi-estimation/sssss3nn"/>
      <lastmod>2026-11-02T18:59:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-pi-estimation/sssss3nn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-pi-estimation/sssss3nn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-pi-estimation/sssss3nn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-pi-estimation/sssss3nn"/>
      <lastmod>2026-11-02T18:59:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-4-4-lesson-half-as-much-again/sssss3n2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-4-4-lesson-half-as-much-again/sssss3n2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-4-4-lesson-half-as-much-again/sssss3n2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-4-4-lesson-half-as-much-again/sssss3n2"/>
      <lastmod>2026-11-02T10:37:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-4-4-lesson-half-as-much-again/sssss3n2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-4-4-lesson-half-as-much-again/sssss3n2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-4-4-lesson-half-as-much-again/sssss3n2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-4-4-lesson-half-as-much-again/sssss3n2"/>
      <lastmod>2026-11-02T10:37:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truck-transport-task/sssss3nk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truck-transport-task/sssss3nk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truck-transport-task/sssss3nk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truck-transport-task/sssss3nk"/>
      <lastmod>2026-11-02T18:54:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truck-transport-task/sssss3nk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truck-transport-task/sssss3nk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truck-transport-task/sssss3nk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truck-transport-task/sssss3nk"/>
      <lastmod>2026-11-02T18:54:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-geometric-construction-by-ejwaldron/sssss3nz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-geometric-construction-by-ejwaldron/sssss3nz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-geometric-construction-by-ejwaldron/sssss3nz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-geometric-construction-by-ejwaldron/sssss3nz"/>
      <lastmod>2026-11-02T11:48:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-geometric-construction-by-ejwaldron/sssss3nz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-geometric-construction-by-ejwaldron/sssss3nz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-geometric-construction-by-ejwaldron/sssss3nz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-geometric-construction-by-ejwaldron/sssss3nz"/>
      <lastmod>2026-11-02T11:48:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-2/sssss3n0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-2/sssss3n0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan-2/sssss3n0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-2/sssss3n0"/>
      <lastmod>2026-11-02T17:53:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan-2/sssss3n0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-2/sssss3n0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan-2/sssss3n0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-2/sssss3n0"/>
      <lastmod>2026-11-02T17:53:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-equations-by-plotting-points/sssss3nd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-by-plotting-points/sssss3nd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-by-plotting-points/sssss3nd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-by-plotting-points/sssss3nd"/>
      <lastmod>2026-11-01T20:58:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-equations-by-plotting-points/sssss3nd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-by-plotting-points/sssss3nd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-by-plotting-points/sssss3nd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-by-plotting-points/sssss3nd"/>
      <lastmod>2026-11-01T20:58:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-triangles-1-square-grid/sssss3nf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-triangles-1-square-grid/sssss3nf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-triangles-1-square-grid/sssss3nf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-triangles-1-square-grid/sssss3nf"/>
      <lastmod>2026-11-01T19:06:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-triangles-1-square-grid/sssss3nf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-triangles-1-square-grid/sssss3nf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-triangles-1-square-grid/sssss3nf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-triangles-1-square-grid/sssss3nf"/>
      <lastmod>2026-11-01T19:06:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/small-angle-approximations-sine/sssss3n8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/small-angle-approximations-sine/sssss3n8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/small-angle-approximations-sine/sssss3n8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/small-angle-approximations-sine/sssss3n8"/>
      <lastmod>2026-11-01T19:23:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/small-angle-approximations-sine/sssss3n8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/small-angle-approximations-sine/sssss3n8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/small-angle-approximations-sine/sssss3n8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/small-angle-approximations-sine/sssss3n8"/>
      <lastmod>2026-11-01T19:23:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-shadows-demonstration/sssss3nu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-shadows-demonstration/sssss3nu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-shadows-demonstration/sssss3nu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-shadows-demonstration/sssss3nu"/>
      <lastmod>2026-11-01T21:58:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-shadows-demonstration/sssss3nu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-shadows-demonstration/sssss3nu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-shadows-demonstration/sssss3nu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-shadows-demonstration/sssss3nu"/>
      <lastmod>2026-11-01T21:58:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/determine-equivalent-fractions/sssss3n5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determine-equivalent-fractions/sssss3n5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determine-equivalent-fractions/sssss3n5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determine-equivalent-fractions/sssss3n5"/>
      <lastmod>2026-11-02T09:09:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/determine-equivalent-fractions/sssss3n5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determine-equivalent-fractions/sssss3n5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determine-equivalent-fractions/sssss3n5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determine-equivalent-fractions/sssss3n5"/>
      <lastmod>2026-11-02T09:09:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-comparison-more-or-less-than-1-4-1-2-or-3-4-card-game/sssss3nb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-comparison-more-or-less-than-1-4-1-2-or-3-4-card-game/sssss3nb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-comparison-more-or-less-than-1-4-1-2-or-3-4-card-game/sssss3nb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-comparison-more-or-less-than-1-4-1-2-or-3-4-card-game/sssss3nb"/>
      <lastmod>2026-11-01T21:26:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-comparison-more-or-less-than-1-4-1-2-or-3-4-card-game/sssss3nb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-comparison-more-or-less-than-1-4-1-2-or-3-4-card-game/sssss3nb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-comparison-more-or-less-than-1-4-1-2-or-3-4-card-game/sssss3nb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-comparison-more-or-less-than-1-4-1-2-or-3-4-card-game/sssss3nb"/>
      <lastmod>2026-11-01T21:26:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-function-graph-geogebra-example/sssss3n3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-function-graph-geogebra-example/sssss3n3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-function-graph-geogebra-example/sssss3n3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-function-graph-geogebra-example/sssss3n3"/>
      <lastmod>2026-11-02T10:40:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-function-graph-geogebra-example/sssss3n3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-function-graph-geogebra-example/sssss3n3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-function-graph-geogebra-example/sssss3n3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-function-graph-geogebra-example/sssss3n3"/>
      <lastmod>2026-11-02T10:40:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shifted-parabola-demonstration/sssss3nq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shifted-parabola-demonstration/sssss3nq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shifted-parabola-demonstration/sssss3nq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shifted-parabola-demonstration/sssss3nq"/>
      <lastmod>2026-11-02T16:38:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shifted-parabola-demonstration/sssss3nq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shifted-parabola-demonstration/sssss3nq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shifted-parabola-demonstration/sssss3nq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shifted-parabola-demonstration/sssss3nq"/>
      <lastmod>2026-11-02T16:38:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-normal-approximation-to-binomial-with-continuity-correction/sssss3n1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-normal-approximation-to-binomial-with-continuity-correction/sssss3n1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-normal-approximation-to-binomial-with-continuity-correction/sssss3n1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-normal-approximation-to-binomial-with-continuity-correction/sssss3n1"/>
      <lastmod>2026-11-01T21:53:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-normal-approximation-to-binomial-with-continuity-correction/sssss3n1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-normal-approximation-to-binomial-with-continuity-correction/sssss3n1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-normal-approximation-to-binomial-with-continuity-correction/sssss3n1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-normal-approximation-to-binomial-with-continuity-correction/sssss3n1"/>
      <lastmod>2026-11-01T21:53:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-midsegment-guided-exploration/sssss3nm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-midsegment-guided-exploration/sssss3nm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-midsegment-guided-exploration/sssss3nm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-midsegment-guided-exploration/sssss3nm"/>
      <lastmod>2026-11-01T21:09:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-midsegment-guided-exploration/sssss3nm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-midsegment-guided-exploration/sssss3nm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-midsegment-guided-exploration/sssss3nm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-midsegment-guided-exploration/sssss3nm"/>
      <lastmod>2026-11-01T21:09:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-construction/sssss3nj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-construction/sssss3nj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-construction/sssss3nj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-construction/sssss3nj"/>
      <lastmod>2026-11-02T03:05:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-construction/sssss3nj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-construction/sssss3nj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-construction/sssss3nj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-construction/sssss3nj"/>
      <lastmod>2026-11-02T03:05:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-7b-sine-cosine-and-tangent-lines/sssss3np</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-7b-sine-cosine-and-tangent-lines/sssss3np"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-7b-sine-cosine-and-tangent-lines/sssss3np"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-7b-sine-cosine-and-tangent-lines/sssss3np"/>
      <lastmod>2026-11-02T18:41:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-7b-sine-cosine-and-tangent-lines/sssss3np</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-7b-sine-cosine-and-tangent-lines/sssss3np"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-7b-sine-cosine-and-tangent-lines/sssss3np"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-7b-sine-cosine-and-tangent-lines/sssss3np"/>
      <lastmod>2026-11-02T18:41:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-cone-interaction-demo/sssss3nw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-cone-interaction-demo/sssss3nw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-cone-interaction-demo/sssss3nw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-cone-interaction-demo/sssss3nw"/>
      <lastmod>2026-11-02T00:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-cone-interaction-demo/sssss3nw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-cone-interaction-demo/sssss3nw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-cone-interaction-demo/sssss3nw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-cone-interaction-demo/sssss3nw"/>
      <lastmod>2026-11-02T00:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/toro-sinusoidal-surface/sssss3n6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/toro-sinusoidal-surface/sssss3n6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/toro-sinusoidal-surface/sssss3n6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/toro-sinusoidal-surface/sssss3n6"/>
      <lastmod>2026-11-02T17:52:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/toro-sinusoidal-surface/sssss3n6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/toro-sinusoidal-surface/sssss3n6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/toro-sinusoidal-surface/sssss3n6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/toro-sinusoidal-surface/sssss3n6"/>
      <lastmod>2026-11-02T17:52:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/least-squares-regression-example/sssss3ng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/least-squares-regression-example/sssss3ng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/least-squares-regression-example/sssss3ng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/least-squares-regression-example/sssss3ng"/>
      <lastmod>2026-11-01T21:15:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/least-squares-regression-example/sssss3ng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/least-squares-regression-example/sssss3ng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/least-squares-regression-example/sssss3ng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/least-squares-regression-example/sssss3ng"/>
      <lastmod>2026-11-01T21:15:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sector-to-lateral-area-of-cone/sssss3n9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sector-to-lateral-area-of-cone/sssss3n9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sector-to-lateral-area-of-cone/sssss3n9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sector-to-lateral-area-of-cone/sssss3n9"/>
      <lastmod>2026-11-02T00:25:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sector-to-lateral-area-of-cone/sssss3n9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sector-to-lateral-area-of-cone/sssss3n9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sector-to-lateral-area-of-cone/sssss3n9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sector-to-lateral-area-of-cone/sssss3n9"/>
      <lastmod>2026-11-02T00:25:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equation-graphing-in-standard-form-question-generator/sssss3ne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-graphing-in-standard-form-question-generator/sssss3ne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-graphing-in-standard-form-question-generator/sssss3ne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-graphing-in-standard-form-question-generator/sssss3ne"/>
      <lastmod>2026-11-02T16:41:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equation-graphing-in-standard-form-question-generator/sssss3ne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-graphing-in-standard-form-question-generator/sssss3ne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-graphing-in-standard-form-question-generator/sssss3ne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-graphing-in-standard-form-question-generator/sssss3ne"/>
      <lastmod>2026-11-02T16:41:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-krupongsak-wuttisant-th/sssss3nv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-krupongsak-wuttisant-th/sssss3nv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-by-krupongsak-wuttisant-th/sssss3nv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-krupongsak-wuttisant-th/sssss3nv"/>
      <lastmod>2026-11-02T07:11:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-quadratic-equations-by-krupongsak-wuttisant-th/sssss3nv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-krupongsak-wuttisant-th/sssss3nv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-by-krupongsak-wuttisant-th/sssss3nv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-krupongsak-wuttisant-th/sssss3nv"/>
      <lastmod>2026-11-02T07:11:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-coordinates-by-bijan-rabbani/sssss3n4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-bijan-rabbani/sssss3n4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-by-bijan-rabbani/sssss3n4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-bijan-rabbani/sssss3n4"/>
      <lastmod>2026-11-01T21:25:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-coordinates-by-bijan-rabbani/sssss3n4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-bijan-rabbani/sssss3n4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-by-bijan-rabbani/sssss3n4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-bijan-rabbani/sssss3n4"/>
      <lastmod>2026-11-01T21:25:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-triangle-s-orthocenter-midpoint/sssss3nl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-triangle-s-orthocenter-midpoint/sssss3nl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-triangle-s-orthocenter-midpoint/sssss3nl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-triangle-s-orthocenter-midpoint/sssss3nl"/>
      <lastmod>2026-11-02T18:10:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-triangle-s-orthocenter-midpoint/sssss3nl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-triangle-s-orthocenter-midpoint/sssss3nl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-triangle-s-orthocenter-midpoint/sssss3nl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-triangle-s-orthocenter-midpoint/sssss3nl"/>
      <lastmod>2026-11-02T18:10:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-template/sssss3ny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-template/sssss3ny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-template/sssss3ny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-template/sssss3ny"/>
      <lastmod>2026-11-01T21:18:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-template/sssss3ny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-template/sssss3ny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-template/sssss3ny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-template/sssss3ny"/>
      <lastmod>2026-11-01T21:18:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-stretching/sssss3na</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-stretching/sssss3na"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-stretching/sssss3na"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-stretching/sssss3na"/>
      <lastmod>2026-11-01T19:18:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-stretching/sssss3na</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-stretching/sssss3na"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-stretching/sssss3na"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-stretching/sssss3na"/>
      <lastmod>2026-11-01T19:18:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolas-as-products-of-linear-functions/sssss3nc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas-as-products-of-linear-functions/sssss3nc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas-as-products-of-linear-functions/sssss3nc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas-as-products-of-linear-functions/sssss3nc"/>
      <lastmod>2026-11-01T23:46:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabolas-as-products-of-linear-functions/sssss3nc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas-as-products-of-linear-functions/sssss3nc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas-as-products-of-linear-functions/sssss3nc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas-as-products-of-linear-functions/sssss3nc"/>
      <lastmod>2026-11-01T23:46:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/snowflakes-and-kaleidoscopes/sssss3nr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snowflakes-and-kaleidoscopes/sssss3nr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snowflakes-and-kaleidoscopes/sssss3nr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snowflakes-and-kaleidoscopes/sssss3nr"/>
      <lastmod>2026-11-02T18:44:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/snowflakes-and-kaleidoscopes/sssss3nr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snowflakes-and-kaleidoscopes/sssss3nr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snowflakes-and-kaleidoscopes/sssss3nr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snowflakes-and-kaleidoscopes/sssss3nr"/>
      <lastmod>2026-11-02T18:44:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nested-and-rotated-cubes-by-steve-phelps/sssss3nh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nested-and-rotated-cubes-by-steve-phelps/sssss3nh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nested-and-rotated-cubes-by-steve-phelps/sssss3nh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nested-and-rotated-cubes-by-steve-phelps/sssss3nh"/>
      <lastmod>2026-11-02T18:45:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nested-and-rotated-cubes-by-steve-phelps/sssss3nh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nested-and-rotated-cubes-by-steve-phelps/sssss3nh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nested-and-rotated-cubes-by-steve-phelps/sssss3nh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nested-and-rotated-cubes-by-steve-phelps/sssss3nh"/>
      <lastmod>2026-11-02T18:45:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-a-cuboid/sssss3nt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-a-cuboid/sssss3nt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-a-cuboid/sssss3nt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-a-cuboid/sssss3nt"/>
      <lastmod>2026-11-01T23:16:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-a-cuboid/sssss3nt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-a-cuboid/sssss3nt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-a-cuboid/sssss3nt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-a-cuboid/sssss3nt"/>
      <lastmod>2026-11-01T23:16:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transforming-quadratics/sssss3nx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-quadratics/sssss3nx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-quadratics/sssss3nx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-quadratics/sssss3nx"/>
      <lastmod>2026-11-02T12:22:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transforming-quadratics/sssss3nx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-quadratics/sssss3nx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-quadratics/sssss3nx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-quadratics/sssss3nx"/>
      <lastmod>2026-11-02T12:22:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scatter-plot-and-statistics-demonstration/sssss3ni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scatter-plot-and-statistics-demonstration/sssss3ni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scatter-plot-and-statistics-demonstration/sssss3ni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scatter-plot-and-statistics-demonstration/sssss3ni"/>
      <lastmod>2026-11-02T00:34:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scatter-plot-and-statistics-demonstration/sssss3ni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scatter-plot-and-statistics-demonstration/sssss3ni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scatter-plot-and-statistics-demonstration/sssss3ni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scatter-plot-and-statistics-demonstration/sssss3ni"/>
      <lastmod>2026-11-02T00:34:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipses-and-symmetry-patterns/sssss3no</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipses-and-symmetry-patterns/sssss3no"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipses-and-symmetry-patterns/sssss3no"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipses-and-symmetry-patterns/sssss3no"/>
      <lastmod>2026-11-02T18:28:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipses-and-symmetry-patterns/sssss3no</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipses-and-symmetry-patterns/sssss3no"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipses-and-symmetry-patterns/sssss3no"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipses-and-symmetry-patterns/sssss3no"/>
      <lastmod>2026-11-02T18:28:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-stars-a-geometric-pattern-with-linear-and-quadratic-functions/sssss32s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-stars-a-geometric-pattern-with-linear-and-quadratic-functions/sssss32s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-stars-a-geometric-pattern-with-linear-and-quadratic-functions/sssss32s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-stars-a-geometric-pattern-with-linear-and-quadratic-functions/sssss32s"/>
      <lastmod>2026-11-01T19:07:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-stars-a-geometric-pattern-with-linear-and-quadratic-functions/sssss32s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-stars-a-geometric-pattern-with-linear-and-quadratic-functions/sssss32s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-stars-a-geometric-pattern-with-linear-and-quadratic-functions/sssss32s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-stars-a-geometric-pattern-with-linear-and-quadratic-functions/sssss32s"/>
      <lastmod>2026-11-01T19:07:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-lines-definition-demo/sssss327</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-definition-demo/sssss327"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-definition-demo/sssss327"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-definition-demo/sssss327"/>
      <lastmod>2026-11-01T22:07:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-lines-definition-demo/sssss327</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-definition-demo/sssss327"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-definition-demo/sssss327"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-definition-demo/sssss327"/>
      <lastmod>2026-11-01T22:07:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-equivalent-fractions/sssss32n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-equivalent-fractions/sssss32n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-equivalent-fractions/sssss32n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-equivalent-fractions/sssss32n"/>
      <lastmod>2026-11-01T20:52:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-equivalent-fractions/sssss32n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-equivalent-fractions/sssss32n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-equivalent-fractions/sssss32n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-equivalent-fractions/sssss32n"/>
      <lastmod>2026-11-01T20:52:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone-aps-dynamic-3d-to-2d-unfolding/sssss322</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-aps-dynamic-3d-to-2d-unfolding/sssss322"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-aps-dynamic-3d-to-2d-unfolding/sssss322"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-aps-dynamic-3d-to-2d-unfolding/sssss322"/>
      <lastmod>2026-11-01T21:49:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cone-aps-dynamic-3d-to-2d-unfolding/sssss322</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-aps-dynamic-3d-to-2d-unfolding/sssss322"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-aps-dynamic-3d-to-2d-unfolding/sssss322"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-aps-dynamic-3d-to-2d-unfolding/sssss322"/>
      <lastmod>2026-11-01T21:49:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-fraction-division-by-ibrahim-el-hage-2/sssss32k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-fraction-division-by-ibrahim-el-hage-2/sssss32k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-fraction-division-by-ibrahim-el-hage-2/sssss32k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-fraction-division-by-ibrahim-el-hage-2/sssss32k"/>
      <lastmod>2026-11-02T18:10:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-fraction-division-by-ibrahim-el-hage-2/sssss32k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-fraction-division-by-ibrahim-el-hage-2/sssss32k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-fraction-division-by-ibrahim-el-hage-2/sssss32k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-fraction-division-by-ibrahim-el-hage-2/sssss32k"/>
      <lastmod>2026-11-02T18:10:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/laws-of-logarithms-by-dr-sedaghatjou/sssss32z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/laws-of-logarithms-by-dr-sedaghatjou/sssss32z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/laws-of-logarithms-by-dr-sedaghatjou/sssss32z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/laws-of-logarithms-by-dr-sedaghatjou/sssss32z"/>
      <lastmod>2026-11-01T23:18:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/laws-of-logarithms-by-dr-sedaghatjou/sssss32z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/laws-of-logarithms-by-dr-sedaghatjou/sssss32z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/laws-of-logarithms-by-dr-sedaghatjou/sssss32z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/laws-of-logarithms-by-dr-sedaghatjou/sssss32z"/>
      <lastmod>2026-11-01T23:18:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sample-means-distribution-repeated-sampling-and-histogram/sssss320</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-means-distribution-repeated-sampling-and-histogram/sssss320"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-means-distribution-repeated-sampling-and-histogram/sssss320"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-means-distribution-repeated-sampling-and-histogram/sssss320"/>
      <lastmod>2026-11-02T03:18:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sample-means-distribution-repeated-sampling-and-histogram/sssss320</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-means-distribution-repeated-sampling-and-histogram/sssss320"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-means-distribution-repeated-sampling-and-histogram/sssss320"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-means-distribution-repeated-sampling-and-histogram/sssss320"/>
      <lastmod>2026-11-02T03:18:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-characteristics/sssss32d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-characteristics/sssss32d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-characteristics/sssss32d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-characteristics/sssss32d"/>
      <lastmod>2026-11-01T23:25:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-characteristics/sssss32d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-characteristics/sssss32d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-characteristics/sssss32d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-characteristics/sssss32d"/>
      <lastmod>2026-11-01T23:25:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/folding-and-symmetry-line-investigation/sssss32f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folding-and-symmetry-line-investigation/sssss32f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folding-and-symmetry-line-investigation/sssss32f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folding-and-symmetry-line-investigation/sssss32f"/>
      <lastmod>2026-11-02T17:44:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/folding-and-symmetry-line-investigation/sssss32f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folding-and-symmetry-line-investigation/sssss32f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folding-and-symmetry-line-investigation/sssss32f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folding-and-symmetry-line-investigation/sssss32f"/>
      <lastmod>2026-11-02T17:44:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p6-symmetry-appreciation-exploring-symmetrical-figures/sssss328</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p6-symmetry-appreciation-exploring-symmetrical-figures/sssss328"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p6-symmetry-appreciation-exploring-symmetrical-figures/sssss328"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p6-symmetry-appreciation-exploring-symmetrical-figures/sssss328"/>
      <lastmod>2026-11-01T20:48:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p6-symmetry-appreciation-exploring-symmetrical-figures/sssss328</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p6-symmetry-appreciation-exploring-symmetrical-figures/sssss328"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p6-symmetry-appreciation-exploring-symmetrical-figures/sssss328"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p6-symmetry-appreciation-exploring-symmetrical-figures/sssss328"/>
      <lastmod>2026-11-01T20:48:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimating-multiplication-up-to-10000/sssss32u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-multiplication-up-to-10000/sssss32u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-multiplication-up-to-10000/sssss32u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-multiplication-up-to-10000/sssss32u"/>
      <lastmod>2026-11-02T18:47:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimating-multiplication-up-to-10000/sssss32u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-multiplication-up-to-10000/sssss32u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-multiplication-up-to-10000/sssss32u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-multiplication-up-to-10000/sssss32u"/>
      <lastmod>2026-11-02T18:47:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphs-and-correspondence-rules-1-task/sssss325</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-and-correspondence-rules-1-task/sssss325"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-and-correspondence-rules-1-task/sssss325"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-and-correspondence-rules-1-task/sssss325"/>
      <lastmod>2026-11-02T18:03:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphs-and-correspondence-rules-1-task/sssss325</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-and-correspondence-rules-1-task/sssss325"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-and-correspondence-rules-1-task/sssss325"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-and-correspondence-rules-1-task/sssss325"/>
      <lastmod>2026-11-02T18:03:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/correlation-coefficient-explorer-with-z-points/sssss32b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-coefficient-explorer-with-z-points/sssss32b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-coefficient-explorer-with-z-points/sssss32b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-coefficient-explorer-with-z-points/sssss32b"/>
      <lastmod>2026-11-02T17:54:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/correlation-coefficient-explorer-with-z-points/sssss32b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-coefficient-explorer-with-z-points/sssss32b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-coefficient-explorer-with-z-points/sssss32b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-coefficient-explorer-with-z-points/sssss32b"/>
      <lastmod>2026-11-02T17:54:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractal-curve-iterated-semicircles-with-scaling-and-rotation/sssss323</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-curve-iterated-semicircles-with-scaling-and-rotation/sssss323"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-curve-iterated-semicircles-with-scaling-and-rotation/sssss323"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-curve-iterated-semicircles-with-scaling-and-rotation/sssss323"/>
      <lastmod>2026-11-01T21:19:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractal-curve-iterated-semicircles-with-scaling-and-rotation/sssss323</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-curve-iterated-semicircles-with-scaling-and-rotation/sssss323"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-curve-iterated-semicircles-with-scaling-and-rotation/sssss323"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-curve-iterated-semicircles-with-scaling-and-rotation/sssss323"/>
      <lastmod>2026-11-01T21:19:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-spiral/sssss32q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-spiral/sssss32q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-spiral/sssss32q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-spiral/sssss32q"/>
      <lastmod>2026-11-02T02:36:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-spiral/sssss32q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-spiral/sssss32q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-spiral/sssss32q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-spiral/sssss32q"/>
      <lastmod>2026-11-02T02:36:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bivariate-distribution-dual-input-demo/sssss321</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bivariate-distribution-dual-input-demo/sssss321"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bivariate-distribution-dual-input-demo/sssss321"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bivariate-distribution-dual-input-demo/sssss321"/>
      <lastmod>2026-11-02T16:36:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bivariate-distribution-dual-input-demo/sssss321</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bivariate-distribution-dual-input-demo/sssss321"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bivariate-distribution-dual-input-demo/sssss321"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bivariate-distribution-dual-input-demo/sssss321"/>
      <lastmod>2026-11-02T16:36:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-geometry-demo/sssss32m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-geometry-demo/sssss32m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-geometry-demo/sssss32m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-geometry-demo/sssss32m"/>
      <lastmod>2026-11-02T16:31:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-geometry-demo/sssss32m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-geometry-demo/sssss32m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-geometry-demo/sssss32m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-geometry-demo/sssss32m"/>
      <lastmod>2026-11-02T16:31:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connecting-derivatives-and-integrals-from-slope-to-area/sssss32j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connecting-derivatives-and-integrals-from-slope-to-area/sssss32j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connecting-derivatives-and-integrals-from-slope-to-area/sssss32j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connecting-derivatives-and-integrals-from-slope-to-area/sssss32j"/>
      <lastmod>2026-11-01T21:40:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connecting-derivatives-and-integrals-from-slope-to-area/sssss32j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connecting-derivatives-and-integrals-from-slope-to-area/sssss32j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connecting-derivatives-and-integrals-from-slope-to-area/sssss32j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connecting-derivatives-and-integrals-from-slope-to-area/sssss32j"/>
      <lastmod>2026-11-01T21:40:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-trig-ratios-of-similar-right-triangles/sssss32p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-trig-ratios-of-similar-right-triangles/sssss32p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-trig-ratios-of-similar-right-triangles/sssss32p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-trig-ratios-of-similar-right-triangles/sssss32p"/>
      <lastmod>2026-11-02T06:16:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-trig-ratios-of-similar-right-triangles/sssss32p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-trig-ratios-of-similar-right-triangles/sssss32p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-trig-ratios-of-similar-right-triangles/sssss32p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-trig-ratios-of-similar-right-triangles/sssss32p"/>
      <lastmod>2026-11-02T06:16:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-factorization-ii/sssss32w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-factorization-ii/sssss32w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-by-factorization-ii/sssss32w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-factorization-ii/sssss32w"/>
      <lastmod>2026-11-02T18:41:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-quadratic-equations-by-factorization-ii/sssss32w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-factorization-ii/sssss32w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-by-factorization-ii/sssss32w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-factorization-ii/sssss32w"/>
      <lastmod>2026-11-02T18:41:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratios-in-right-triangles/sssss326</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-in-right-triangles/sssss326"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-in-right-triangles/sssss326"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-in-right-triangles/sssss326"/>
      <lastmod>2026-11-01T22:01:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratios-in-right-triangles/sssss326</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-in-right-triangles/sssss326"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-in-right-triangles/sssss326"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-in-right-triangles/sssss326"/>
      <lastmod>2026-11-01T22:01:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-formula/sssss32g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-formula/sssss32g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-formula/sssss32g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-formula/sssss32g"/>
      <lastmod>2026-11-02T09:38:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-formula/sssss32g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-formula/sssss32g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-formula/sssss32g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-formula/sssss32g"/>
      <lastmod>2026-11-02T09:38:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pearson-correlation-coefficient-demo/sssss329</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pearson-correlation-coefficient-demo/sssss329"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pearson-correlation-coefficient-demo/sssss329"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pearson-correlation-coefficient-demo/sssss329"/>
      <lastmod>2026-11-02T00:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pearson-correlation-coefficient-demo/sssss329</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pearson-correlation-coefficient-demo/sssss329"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pearson-correlation-coefficient-demo/sssss329"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pearson-correlation-coefficient-demo/sssss329"/>
      <lastmod>2026-11-02T00:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-definition/sssss32e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-definition/sssss32e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-definition/sssss32e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-definition/sssss32e"/>
      <lastmod>2026-11-02T08:51:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-definition/sssss32e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-definition/sssss32e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-definition/sssss32e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-definition/sssss32e"/>
      <lastmod>2026-11-02T08:51:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-exponential-function/sssss32v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-exponential-function/sssss32v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-exponential-function/sssss32v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-exponential-function/sssss32v"/>
      <lastmod>2026-11-02T02:38:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-exponential-function/sssss32v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-exponential-function/sssss32v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-exponential-function/sssss32v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-exponential-function/sssss32v"/>
      <lastmod>2026-11-02T02:38:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-sine-x-example/sssss324</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-sine-x-example/sssss324"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-sine-x-example/sssss324"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-sine-x-example/sssss324"/>
      <lastmod>2026-11-02T03:01:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-sine-x-example/sssss324</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-sine-x-example/sssss324"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-sine-x-example/sssss324"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-sine-x-example/sssss324"/>
      <lastmod>2026-11-02T03:01:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-swimming-fish-animation/sssss32l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-swimming-fish-animation/sssss32l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-swimming-fish-animation/sssss32l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-swimming-fish-animation/sssss32l"/>
      <lastmod>2026-11-01T21:26:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-swimming-fish-animation/sssss32l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-swimming-fish-animation/sssss32l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-swimming-fish-animation/sssss32l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-swimming-fish-animation/sssss32l"/>
      <lastmod>2026-11-01T21:26:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-net/sssss32y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net/sssss32y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net/sssss32y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net/sssss32y"/>
      <lastmod>2026-11-02T03:07:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-net/sssss32y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net/sssss32y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net/sssss32y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net/sssss32y"/>
      <lastmod>2026-11-02T03:07:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-dynamic-geogebra-demo/sssss32a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-dynamic-geogebra-demo/sssss32a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-dynamic-geogebra-demo/sssss32a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-dynamic-geogebra-demo/sssss32a"/>
      <lastmod>2026-11-02T18:15:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-dynamic-geogebra-demo/sssss32a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-dynamic-geogebra-demo/sssss32a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-dynamic-geogebra-demo/sssss32a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-dynamic-geogebra-demo/sssss32a"/>
      <lastmod>2026-11-02T18:15:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translated-and-dilated-circles/sssss32c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translated-and-dilated-circles/sssss32c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translated-and-dilated-circles/sssss32c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translated-and-dilated-circles/sssss32c"/>
      <lastmod>2026-11-02T00:57:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translated-and-dilated-circles/sssss32c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translated-and-dilated-circles/sssss32c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translated-and-dilated-circles/sssss32c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translated-and-dilated-circles/sssss32c"/>
      <lastmod>2026-11-02T00:57:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter/sssss32r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter/sssss32r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter/sssss32r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter/sssss32r"/>
      <lastmod>2026-11-01T21:06:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter/sssss32r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter/sssss32r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter/sssss32r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter/sssss32r"/>
      <lastmod>2026-11-01T21:06:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-the-ubuntu-logo/sssss32h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-ubuntu-logo/sssss32h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-ubuntu-logo/sssss32h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-ubuntu-logo/sssss32h"/>
      <lastmod>2026-11-01T21:56:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-the-ubuntu-logo/sssss32h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-ubuntu-logo/sssss32h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-ubuntu-logo/sssss32h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-ubuntu-logo/sssss32h"/>
      <lastmod>2026-11-01T21:56:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-ellipses-show-circle-or-cross/sssss32t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-ellipses-show-circle-or-cross/sssss32t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-ellipses-show-circle-or-cross/sssss32t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-ellipses-show-circle-or-cross/sssss32t"/>
      <lastmod>2026-11-01T21:29:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-ellipses-show-circle-or-cross/sssss32t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-ellipses-show-circle-or-cross/sssss32t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-ellipses-show-circle-or-cross/sssss32t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-ellipses-show-circle-or-cross/sssss32t"/>
      <lastmod>2026-11-01T21:29:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compass-bearing-quiz/sssss32x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compass-bearing-quiz/sssss32x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compass-bearing-quiz/sssss32x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compass-bearing-quiz/sssss32x"/>
      <lastmod>2026-11-02T08:40:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compass-bearing-quiz/sssss32x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compass-bearing-quiz/sssss32x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compass-bearing-quiz/sssss32x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compass-bearing-quiz/sssss32x"/>
      <lastmod>2026-11-02T08:40:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pringles-modeling-in-geogebra-3d-quick-demo/sssss32i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pringles-modeling-in-geogebra-3d-quick-demo/sssss32i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pringles-modeling-in-geogebra-3d-quick-demo/sssss32i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pringles-modeling-in-geogebra-3d-quick-demo/sssss32i"/>
      <lastmod>2026-11-01T19:24:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pringles-modeling-in-geogebra-3d-quick-demo/sssss32i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pringles-modeling-in-geogebra-3d-quick-demo/sssss32i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pringles-modeling-in-geogebra-3d-quick-demo/sssss32i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pringles-modeling-in-geogebra-3d-quick-demo/sssss32i"/>
      <lastmod>2026-11-01T19:24:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-sections-of-a-trapezoidal-prism/sssss32o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-trapezoidal-prism/sssss32o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-trapezoidal-prism/sssss32o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-trapezoidal-prism/sssss32o"/>
      <lastmod>2026-11-02T15:54:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-sections-of-a-trapezoidal-prism/sssss32o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-trapezoidal-prism/sssss32o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-trapezoidal-prism/sssss32o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-trapezoidal-prism/sssss32o"/>
      <lastmod>2026-11-02T15:54:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-norm-prokup/sssss3ks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-norm-prokup/sssss3ks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-pyramid-by-norm-prokup/sssss3ks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-norm-prokup/sssss3ks"/>
      <lastmod>2026-11-02T17:01:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-pyramid-by-norm-prokup/sssss3ks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-norm-prokup/sssss3ks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-pyramid-by-norm-prokup/sssss3ks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-norm-prokup/sssss3ks"/>
      <lastmod>2026-11-02T17:01:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-pyramid-via-prisms/sssss3k7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-pyramid-via-prisms/sssss3k7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-pyramid-via-prisms/sssss3k7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-pyramid-via-prisms/sssss3k7"/>
      <lastmod>2026-11-02T16:53:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-pyramid-via-prisms/sssss3k7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-pyramid-via-prisms/sssss3k7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-pyramid-via-prisms/sssss3k7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-pyramid-via-prisms/sssss3k7"/>
      <lastmod>2026-11-02T16:53:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-and-indefinite-integral/sssss3kn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-and-indefinite-integral/sssss3kn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-and-indefinite-integral/sssss3kn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-and-indefinite-integral/sssss3kn"/>
      <lastmod>2026-11-02T18:57:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-and-indefinite-integral/sssss3kn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-and-indefinite-integral/sssss3kn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-and-indefinite-integral/sssss3kn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-and-indefinite-integral/sssss3kn"/>
      <lastmod>2026-11-02T18:57:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/h-trapezoid-construction/sssss3k2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h-trapezoid-construction/sssss3k2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h-trapezoid-construction/sssss3k2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h-trapezoid-construction/sssss3k2"/>
      <lastmod>2026-11-02T17:35:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/h-trapezoid-construction/sssss3k2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h-trapezoid-construction/sssss3k2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h-trapezoid-construction/sssss3k2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h-trapezoid-construction/sssss3k2"/>
      <lastmod>2026-11-02T17:35:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-functions-demo-by-presley-ncube/sssss3kk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-demo-by-presley-ncube/sssss3kk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-demo-by-presley-ncube/sssss3kk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-demo-by-presley-ncube/sssss3kk"/>
      <lastmod>2026-11-01T23:14:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-functions-demo-by-presley-ncube/sssss3kk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-demo-by-presley-ncube/sssss3kk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-demo-by-presley-ncube/sssss3kk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-demo-by-presley-ncube/sssss3kk"/>
      <lastmod>2026-11-01T23:14:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-surfaces-in-space/sssss3kz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-surfaces-in-space/sssss3kz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-surfaces-in-space/sssss3kz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-surfaces-in-space/sssss3kz"/>
      <lastmod>2026-11-02T18:09:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-surfaces-in-space/sssss3kz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-surfaces-in-space/sssss3kz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-surfaces-in-space/sssss3kz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-surfaces-in-space/sssss3kz"/>
      <lastmod>2026-11-02T18:09:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lotka-volterra-system-with-physical-space/sssss3k0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lotka-volterra-system-with-physical-space/sssss3k0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lotka-volterra-system-with-physical-space/sssss3k0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lotka-volterra-system-with-physical-space/sssss3k0"/>
      <lastmod>2026-11-02T17:35:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lotka-volterra-system-with-physical-space/sssss3k0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lotka-volterra-system-with-physical-space/sssss3k0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lotka-volterra-system-with-physical-space/sssss3k0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lotka-volterra-system-with-physical-space/sssss3k0"/>
      <lastmod>2026-11-02T17:35:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/profit-and-loss-interactive-visualization-of-business-math/sssss3kd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/profit-and-loss-interactive-visualization-of-business-math/sssss3kd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/profit-and-loss-interactive-visualization-of-business-math/sssss3kd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/profit-and-loss-interactive-visualization-of-business-math/sssss3kd"/>
      <lastmod>2026-11-01T21:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/profit-and-loss-interactive-visualization-of-business-math/sssss3kd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/profit-and-loss-interactive-visualization-of-business-math/sssss3kd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/profit-and-loss-interactive-visualization-of-business-math/sssss3kd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/profit-and-loss-interactive-visualization-of-business-math/sssss3kd"/>
      <lastmod>2026-11-01T21:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformation-and-art/sssss3kf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-and-art/sssss3kf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-and-art/sssss3kf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-and-art/sssss3kf"/>
      <lastmod>2026-11-02T17:48:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformation-and-art/sssss3kf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-and-art/sssss3kf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-and-art/sssss3kf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-and-art/sssss3kf"/>
      <lastmod>2026-11-02T17:48:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-a-circle-in-a-plane-in-4-space/sssss3k8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-a-circle-in-a-plane-in-4-space/sssss3k8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-a-circle-in-a-plane-in-4-space/sssss3k8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-a-circle-in-a-plane-in-4-space/sssss3k8"/>
      <lastmod>2026-11-01T21:33:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-a-circle-in-a-plane-in-4-space/sssss3k8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-a-circle-in-a-plane-in-4-space/sssss3k8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-a-circle-in-a-plane-in-4-space/sssss3k8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-a-circle-in-a-plane-in-4-space/sssss3k8"/>
      <lastmod>2026-11-01T21:33:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivation-of-trigonometric-ratios/sssss3ku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivation-of-trigonometric-ratios/sssss3ku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivation-of-trigonometric-ratios/sssss3ku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivation-of-trigonometric-ratios/sssss3ku"/>
      <lastmod>2026-11-02T17:55:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivation-of-trigonometric-ratios/sssss3ku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivation-of-trigonometric-ratios/sssss3ku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivation-of-trigonometric-ratios/sssss3ku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivation-of-trigonometric-ratios/sssss3ku"/>
      <lastmod>2026-11-02T17:55:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-volume-exploration-module-8b-pri-hastuti-suryaningrum-smpn-57/sssss3k5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-exploration-module-8b-pri-hastuti-suryaningrum-smpn-57/sssss3k5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-exploration-module-8b-pri-hastuti-suryaningrum-smpn-57/sssss3k5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-exploration-module-8b-pri-hastuti-suryaningrum-smpn-57/sssss3k5"/>
      <lastmod>2026-11-02T00:43:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-volume-exploration-module-8b-pri-hastuti-suryaningrum-smpn-57/sssss3k5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-exploration-module-8b-pri-hastuti-suryaningrum-smpn-57/sssss3k5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-exploration-module-8b-pri-hastuti-suryaningrum-smpn-57/sssss3k5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-exploration-module-8b-pri-hastuti-suryaningrum-smpn-57/sssss3k5"/>
      <lastmod>2026-11-02T00:43:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-cone/sssss3kb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-cone/sssss3kb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-cone/sssss3kb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-cone/sssss3kb"/>
      <lastmod>2026-11-01T20:57:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-cone/sssss3kb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-cone/sssss3kb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-cone/sssss3kb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-cone/sssss3kb"/>
      <lastmod>2026-11-01T20:57:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-translation-demonstrations/sssss3k3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-translation-demonstrations/sssss3k3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-translation-demonstrations/sssss3k3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-translation-demonstrations/sssss3k3"/>
      <lastmod>2026-11-01T23:41:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-translation-demonstrations/sssss3k3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-translation-demonstrations/sssss3k3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-translation-demonstrations/sssss3k3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-translation-demonstrations/sssss3k3"/>
      <lastmod>2026-11-01T23:41:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visual-addition-and-subtraction-of-proper-fractions-with-like-or-unlike-denomina/sssss3kq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-addition-and-subtraction-of-proper-fractions-with-like-or-unlike-denomina/sssss3kq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-addition-and-subtraction-of-proper-fractions-with-like-or-unlike-denomina/sssss3kq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-addition-and-subtraction-of-proper-fractions-with-like-or-unlike-denomina/sssss3kq"/>
      <lastmod>2026-11-02T00:54:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visual-addition-and-subtraction-of-proper-fractions-with-like-or-unlike-denomina/sssss3kq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-addition-and-subtraction-of-proper-fractions-with-like-or-unlike-denomina/sssss3kq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-addition-and-subtraction-of-proper-fractions-with-like-or-unlike-denomina/sssss3kq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-addition-and-subtraction-of-proper-fractions-with-like-or-unlike-denomina/sssss3kq"/>
      <lastmod>2026-11-02T00:54:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/real-numbers-activity-3/sssss3k1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-numbers-activity-3/sssss3k1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-numbers-activity-3/sssss3k1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-numbers-activity-3/sssss3k1"/>
      <lastmod>2026-11-02T08:37:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/real-numbers-activity-3/sssss3k1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-numbers-activity-3/sssss3k1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-numbers-activity-3/sssss3k1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-numbers-activity-3/sssss3k1"/>
      <lastmod>2026-11-02T08:37:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-generated-by-rotating-a-right-triangle/sssss3km</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-generated-by-rotating-a-right-triangle/sssss3km"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-generated-by-rotating-a-right-triangle/sssss3km"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-generated-by-rotating-a-right-triangle/sssss3km"/>
      <lastmod>2026-11-02T18:23:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-generated-by-rotating-a-right-triangle/sssss3km</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-generated-by-rotating-a-right-triangle/sssss3km"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-generated-by-rotating-a-right-triangle/sssss3km"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-generated-by-rotating-a-right-triangle/sssss3km"/>
      <lastmod>2026-11-02T18:23:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case-exploration/sssss3kj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case-exploration/sssss3kj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-ambiguous-case-exploration/sssss3kj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case-exploration/sssss3kj"/>
      <lastmod>2026-11-02T00:14:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-rule-ambiguous-case-exploration/sssss3kj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case-exploration/sssss3kj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-ambiguous-case-exploration/sssss3kj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case-exploration/sssss3kj"/>
      <lastmod>2026-11-02T00:14:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-ellipse-equation/sssss3kp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-ellipse-equation/sssss3kp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-ellipse-equation/sssss3kp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-ellipse-equation/sssss3kp"/>
      <lastmod>2026-11-02T16:46:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-ellipse-equation/sssss3kp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-ellipse-equation/sssss3kp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-ellipse-equation/sssss3kp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-ellipse-equation/sssss3kp"/>
      <lastmod>2026-11-02T16:46:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modulus-dilation-in-relativity/sssss3kw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modulus-dilation-in-relativity/sssss3kw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modulus-dilation-in-relativity/sssss3kw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modulus-dilation-in-relativity/sssss3kw"/>
      <lastmod>2026-11-01T23:38:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modulus-dilation-in-relativity/sssss3kw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modulus-dilation-in-relativity/sssss3kw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modulus-dilation-in-relativity/sssss3kw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modulus-dilation-in-relativity/sssss3kw"/>
      <lastmod>2026-11-01T23:38:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/five-by-five/sssss3k6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/five-by-five/sssss3k6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/five-by-five/sssss3k6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/five-by-five/sssss3k6"/>
      <lastmod>2026-11-02T02:24:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/five-by-five/sssss3k6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/five-by-five/sssss3k6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/five-by-five/sssss3k6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/five-by-five/sssss3k6"/>
      <lastmod>2026-11-02T02:24:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-area-of-a-circle-by-aline-lemmertz/sssss3kg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-area-of-a-circle-by-aline-lemmertz/sssss3kg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-area-of-a-circle-by-aline-lemmertz/sssss3kg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-area-of-a-circle-by-aline-lemmertz/sssss3kg"/>
      <lastmod>2026-11-02T18:07:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-area-of-a-circle-by-aline-lemmertz/sssss3kg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-area-of-a-circle-by-aline-lemmertz/sssss3kg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-area-of-a-circle-by-aline-lemmertz/sssss3kg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-area-of-a-circle-by-aline-lemmertz/sssss3kg"/>
      <lastmod>2026-11-02T18:07:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-demo/sssss3k9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-demo/sssss3k9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-demo/sssss3k9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-demo/sssss3k9"/>
      <lastmod>2026-11-01T21:04:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-demo/sssss3k9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-demo/sssss3k9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-demo/sssss3k9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-demo/sssss3k9"/>
      <lastmod>2026-11-01T21:04:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-first-n-natural-numbers/sssss3ke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-first-n-natural-numbers/sssss3ke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-first-n-natural-numbers/sssss3ke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-first-n-natural-numbers/sssss3ke"/>
      <lastmod>2026-11-02T12:03:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-first-n-natural-numbers/sssss3ke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-first-n-natural-numbers/sssss3ke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-first-n-natural-numbers/sssss3ke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-first-n-natural-numbers/sssss3ke"/>
      <lastmod>2026-11-02T12:03:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/overlapping-quarters-of-a-cube-demo/sssss3kv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/overlapping-quarters-of-a-cube-demo/sssss3kv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/overlapping-quarters-of-a-cube-demo/sssss3kv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/overlapping-quarters-of-a-cube-demo/sssss3kv"/>
      <lastmod>2026-11-01T23:50:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/overlapping-quarters-of-a-cube-demo/sssss3kv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/overlapping-quarters-of-a-cube-demo/sssss3kv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/overlapping-quarters-of-a-cube-demo/sssss3kv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/overlapping-quarters-of-a-cube-demo/sssss3kv"/>
      <lastmod>2026-11-01T23:50:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arc-and-number-interaction-demo/sssss3k4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-and-number-interaction-demo/sssss3k4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-and-number-interaction-demo/sssss3k4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-and-number-interaction-demo/sssss3k4"/>
      <lastmod>2026-11-01T22:09:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arc-and-number-interaction-demo/sssss3k4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-and-number-interaction-demo/sssss3k4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-and-number-interaction-demo/sssss3k4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-and-number-interaction-demo/sssss3k4"/>
      <lastmod>2026-11-01T22:09:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-and-triangle-by-arthur-lee/sssss3kl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-triangle-by-arthur-lee/sssss3kl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-triangle-by-arthur-lee/sssss3kl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-triangle-by-arthur-lee/sssss3kl"/>
      <lastmod>2026-11-01T21:22:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-and-triangle-by-arthur-lee/sssss3kl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-triangle-by-arthur-lee/sssss3kl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-triangle-by-arthur-lee/sssss3kl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-triangle-by-arthur-lee/sssss3kl"/>
      <lastmod>2026-11-01T21:22:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-polygon-area-geometric-construction-and-area-calculation-by-tawkac/sssss3ky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-polygon-area-geometric-construction-and-area-calculation-by-tawkac/sssss3ky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-polygon-area-geometric-construction-and-area-calculation-by-tawkac/sssss3ky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-polygon-area-geometric-construction-and-area-calculation-by-tawkac/sssss3ky"/>
      <lastmod>2026-11-02T02:33:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-polygon-area-geometric-construction-and-area-calculation-by-tawkac/sssss3ky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-polygon-area-geometric-construction-and-area-calculation-by-tawkac/sssss3ky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-polygon-area-geometric-construction-and-area-calculation-by-tawkac/sssss3ky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-polygon-area-geometric-construction-and-area-calculation-by-tawkac/sssss3ky"/>
      <lastmod>2026-11-02T02:33:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-construction-by-kaews/sssss3ka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kaews/sssss3ka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-by-kaews/sssss3ka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kaews/sssss3ka"/>
      <lastmod>2026-11-02T00:37:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-construction-by-kaews/sssss3ka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kaews/sssss3ka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-by-kaews/sssss3ka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kaews/sssss3ka"/>
      <lastmod>2026-11-02T00:37:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/percentage-contexts-im-7-4-11-lesson/sssss3kc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-contexts-im-7-4-11-lesson/sssss3kc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-contexts-im-7-4-11-lesson/sssss3kc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-contexts-im-7-4-11-lesson/sssss3kc"/>
      <lastmod>2026-11-01T20:23:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/percentage-contexts-im-7-4-11-lesson/sssss3kc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-contexts-im-7-4-11-lesson/sssss3kc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-contexts-im-7-4-11-lesson/sssss3kc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-contexts-im-7-4-11-lesson/sssss3kc"/>
      <lastmod>2026-11-01T20:23:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-exercise-v1/sssss3kr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-exercise-v1/sssss3kr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-exercise-v1/sssss3kr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-exercise-v1/sssss3kr"/>
      <lastmod>2026-11-02T16:59:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-exercise-v1/sssss3kr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-exercise-v1/sssss3kr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-exercise-v1/sssss3kr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-exercise-v1/sssss3kr"/>
      <lastmod>2026-11-02T16:59:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scale-factor-with-a-rectangle-visualizing-dilation/sssss3kh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scale-factor-with-a-rectangle-visualizing-dilation/sssss3kh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scale-factor-with-a-rectangle-visualizing-dilation/sssss3kh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scale-factor-with-a-rectangle-visualizing-dilation/sssss3kh"/>
      <lastmod>2026-11-02T15:32:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scale-factor-with-a-rectangle-visualizing-dilation/sssss3kh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scale-factor-with-a-rectangle-visualizing-dilation/sssss3kh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scale-factor-with-a-rectangle-visualizing-dilation/sssss3kh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scale-factor-with-a-rectangle-visualizing-dilation/sssss3kh"/>
      <lastmod>2026-11-02T15:32:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/candy-bar-7-6/sssss3kt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/candy-bar-7-6/sssss3kt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/candy-bar-7-6/sssss3kt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/candy-bar-7-6/sssss3kt"/>
      <lastmod>2026-11-01T23:44:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/candy-bar-7-6/sssss3kt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/candy-bar-7-6/sssss3kt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/candy-bar-7-6/sssss3kt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/candy-bar-7-6/sssss3kt"/>
      <lastmod>2026-11-01T23:44:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-right-angle-triangle-fixed-perimeter/sssss3kx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-right-angle-triangle-fixed-perimeter/sssss3kx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-right-angle-triangle-fixed-perimeter/sssss3kx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-right-angle-triangle-fixed-perimeter/sssss3kx"/>
      <lastmod>2026-11-02T08:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-right-angle-triangle-fixed-perimeter/sssss3kx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-right-angle-triangle-fixed-perimeter/sssss3kx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-right-angle-triangle-fixed-perimeter/sssss3kx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-right-angle-triangle-fixed-perimeter/sssss3kx"/>
      <lastmod>2026-11-02T08:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-properties-and-parametric-construction-of-circular-cylinders/sssss3ki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-properties-and-parametric-construction-of-circular-cylinders/sssss3ki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-properties-and-parametric-construction-of-circular-cylinders/sssss3ki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-properties-and-parametric-construction-of-circular-cylinders/sssss3ki"/>
      <lastmod>2026-11-02T17:37:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-properties-and-parametric-construction-of-circular-cylinders/sssss3ki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-properties-and-parametric-construction-of-circular-cylinders/sssss3ki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-properties-and-parametric-construction-of-circular-cylinders/sssss3ki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-properties-and-parametric-construction-of-circular-cylinders/sssss3ki"/>
      <lastmod>2026-11-02T17:37:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/max-area-rectangle-in-ellipse/sssss3ko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-area-rectangle-in-ellipse/sssss3ko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-area-rectangle-in-ellipse/sssss3ko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-area-rectangle-in-ellipse/sssss3ko"/>
      <lastmod>2026-11-01T23:26:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/max-area-rectangle-in-ellipse/sssss3ko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-area-rectangle-in-ellipse/sssss3ko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-area-rectangle-in-ellipse/sssss3ko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-area-rectangle-in-ellipse/sssss3ko"/>
      <lastmod>2026-11-01T23:26:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-by-matt-killam/sssss3zs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-by-matt-killam/sssss3zs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-by-matt-killam/sssss3zs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-by-matt-killam/sssss3zs"/>
      <lastmod>2026-11-02T18:08:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-by-matt-killam/sssss3zs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-by-matt-killam/sssss3zs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-by-matt-killam/sssss3zs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-by-matt-killam/sssss3zs"/>
      <lastmod>2026-11-02T18:08:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-domain-and-range/sssss3z7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-domain-and-range/sssss3z7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-domain-and-range/sssss3z7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-domain-and-range/sssss3z7"/>
      <lastmod>2026-11-01T22:04:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-domain-and-range/sssss3z7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-domain-and-range/sssss3z7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-domain-and-range/sssss3z7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-domain-and-range/sssss3z7"/>
      <lastmod>2026-11-01T22:04:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-the-sine-rule/sssss3zn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-the-sine-rule/sssss3zn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-the-sine-rule/sssss3zn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-the-sine-rule/sssss3zn"/>
      <lastmod>2026-11-02T02:30:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-the-sine-rule/sssss3zn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-the-sine-rule/sssss3zn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-the-sine-rule/sssss3zn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-the-sine-rule/sssss3zn"/>
      <lastmod>2026-11-02T02:30:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-possible-preimages/sssss3z2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-possible-preimages/sssss3z2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-possible-preimages/sssss3z2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-possible-preimages/sssss3z2"/>
      <lastmod>2026-11-01T20:53:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-possible-preimages/sssss3z2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-possible-preimages/sssss3z2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-possible-preimages/sssss3z2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-possible-preimages/sssss3z2"/>
      <lastmod>2026-11-01T20:53:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-and-hyperbola-review/sssss3zk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-hyperbola-review/sssss3zk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-hyperbola-review/sssss3zk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-hyperbola-review/sssss3zk"/>
      <lastmod>2026-11-02T14:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-and-hyperbola-review/sssss3zk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-hyperbola-review/sssss3zk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-hyperbola-review/sssss3zk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-hyperbola-review/sssss3zk"/>
      <lastmod>2026-11-02T14:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-hyperbola/sssss3zz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-hyperbola/sssss3zz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-hyperbola/sssss3zz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-hyperbola/sssss3zz"/>
      <lastmod>2026-11-02T17:38:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-hyperbola/sssss3zz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-hyperbola/sssss3zz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-hyperbola/sssss3zz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-hyperbola/sssss3zz"/>
      <lastmod>2026-11-02T17:38:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-construction/sssss3z0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction/sssss3z0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction/sssss3z0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction/sssss3z0"/>
      <lastmod>2026-11-01T21:11:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-construction/sssss3z0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction/sssss3z0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction/sssss3z0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction/sssss3z0"/>
      <lastmod>2026-11-01T21:11:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/globe-in-cylinder/sssss3zd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/globe-in-cylinder/sssss3zd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/globe-in-cylinder/sssss3zd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/globe-in-cylinder/sssss3zd"/>
      <lastmod>2026-11-02T17:16:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/globe-in-cylinder/sssss3zd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/globe-in-cylinder/sssss3zd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/globe-in-cylinder/sssss3zd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/globe-in-cylinder/sssss3zd"/>
      <lastmod>2026-11-02T17:16:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/designing-a-tent-geogebra-example/sssss3zf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/designing-a-tent-geogebra-example/sssss3zf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/designing-a-tent-geogebra-example/sssss3zf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/designing-a-tent-geogebra-example/sssss3zf"/>
      <lastmod>2026-11-01T20:38:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/designing-a-tent-geogebra-example/sssss3zf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/designing-a-tent-geogebra-example/sssss3zf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/designing-a-tent-geogebra-example/sssss3zf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/designing-a-tent-geogebra-example/sssss3zf"/>
      <lastmod>2026-11-01T20:38:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tips-for-algebraic-input-in-geogebra/sssss3z8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tips-for-algebraic-input-in-geogebra/sssss3z8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tips-for-algebraic-input-in-geogebra/sssss3z8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tips-for-algebraic-input-in-geogebra/sssss3z8"/>
      <lastmod>2026-11-01T22:03:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tips-for-algebraic-input-in-geogebra/sssss3z8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tips-for-algebraic-input-in-geogebra/sssss3z8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tips-for-algebraic-input-in-geogebra/sssss3z8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tips-for-algebraic-input-in-geogebra/sssss3z8"/>
      <lastmod>2026-11-01T22:03:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tetrahedron-in-cube/sssss3zu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tetrahedron-in-cube/sssss3zu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tetrahedron-in-cube/sssss3zu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tetrahedron-in-cube/sssss3zu"/>
      <lastmod>2026-11-02T13:39:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tetrahedron-in-cube/sssss3zu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tetrahedron-in-cube/sssss3zu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tetrahedron-in-cube/sssss3zu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tetrahedron-in-cube/sssss3zu"/>
      <lastmod>2026-11-02T13:39:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-limit-non-existence-study/sssss3z5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-limit-non-existence-study/sssss3z5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-limit-non-existence-study/sssss3z5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-limit-non-existence-study/sssss3z5"/>
      <lastmod>2026-11-02T13:43:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-limit-non-existence-study/sssss3z5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-limit-non-existence-study/sssss3z5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-limit-non-existence-study/sssss3z5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-limit-non-existence-study/sssss3z5"/>
      <lastmod>2026-11-02T13:43:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions-parameters-exploring-slope-and-intercept/sssss3zb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-parameters-exploring-slope-and-intercept/sssss3zb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-parameters-exploring-slope-and-intercept/sssss3zb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-parameters-exploring-slope-and-intercept/sssss3zb"/>
      <lastmod>2026-11-02T12:32:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions-parameters-exploring-slope-and-intercept/sssss3zb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-parameters-exploring-slope-and-intercept/sssss3zb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-parameters-exploring-slope-and-intercept/sssss3zb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-parameters-exploring-slope-and-intercept/sssss3zb"/>
      <lastmod>2026-11-02T12:32:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-linear-relations-from-a-table/sssss3z3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-linear-relations-from-a-table/sssss3z3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-linear-relations-from-a-table/sssss3z3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-linear-relations-from-a-table/sssss3z3"/>
      <lastmod>2026-11-02T09:36:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-linear-relations-from-a-table/sssss3z3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-linear-relations-from-a-table/sssss3z3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-linear-relations-from-a-table/sssss3z3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-linear-relations-from-a-table/sssss3z3"/>
      <lastmod>2026-11-02T09:36:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-ratios-by-ayoub/sssss3zq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-ratios-by-ayoub/sssss3zq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-ratios-by-ayoub/sssss3zq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-ratios-by-ayoub/sssss3zq"/>
      <lastmod>2026-11-01T23:38:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-ratios-by-ayoub/sssss3zq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-ratios-by-ayoub/sssss3zq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-ratios-by-ayoub/sssss3zq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-ratios-by-ayoub/sssss3zq"/>
      <lastmod>2026-11-01T23:38:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case-ssa-dynamic-demonstration/sssss3z1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case-ssa-dynamic-demonstration/sssss3z1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-ambiguous-case-ssa-dynamic-demonstration/sssss3z1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case-ssa-dynamic-demonstration/sssss3z1"/>
      <lastmod>2026-11-01T21:19:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-rule-ambiguous-case-ssa-dynamic-demonstration/sssss3z1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case-ssa-dynamic-demonstration/sssss3z1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-ambiguous-case-ssa-dynamic-demonstration/sssss3z1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case-ssa-dynamic-demonstration/sssss3z1"/>
      <lastmod>2026-11-01T21:19:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-slope-and-y-intercept/sssss3zm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-slope-and-y-intercept/sssss3zm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-slope-and-y-intercept/sssss3zm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-slope-and-y-intercept/sssss3zm"/>
      <lastmod>2026-11-01T21:07:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-slope-and-y-intercept/sssss3zm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-slope-and-y-intercept/sssss3zm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-slope-and-y-intercept/sssss3zm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-slope-and-y-intercept/sssss3zm"/>
      <lastmod>2026-11-01T21:07:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-dilation-demo-by-ben-dougherty/sssss3zj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-dilation-demo-by-ben-dougherty/sssss3zj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-dilation-demo-by-ben-dougherty/sssss3zj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-dilation-demo-by-ben-dougherty/sssss3zj"/>
      <lastmod>2026-11-02T18:52:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-dilation-demo-by-ben-dougherty/sssss3zj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-dilation-demo-by-ben-dougherty/sssss3zj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-dilation-demo-by-ben-dougherty/sssss3zj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-dilation-demo-by-ben-dougherty/sssss3zj"/>
      <lastmod>2026-11-02T18:52:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/jellyfish/sssss3zp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/jellyfish/sssss3zp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/jellyfish/sssss3zp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/jellyfish/sssss3zp"/>
      <lastmod>2026-11-02T02:28:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/jellyfish/sssss3zp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/jellyfish/sssss3zp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/jellyfish/sssss3zp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/jellyfish/sssss3zp"/>
      <lastmod>2026-11-02T02:28:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-fractions-by-ibrahim-el-hage/sssss3zw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-fractions-by-ibrahim-el-hage/sssss3zw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-fractions-by-ibrahim-el-hage/sssss3zw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-fractions-by-ibrahim-el-hage/sssss3zw"/>
      <lastmod>2026-11-02T18:51:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-fractions-by-ibrahim-el-hage/sssss3zw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-fractions-by-ibrahim-el-hage/sssss3zw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-fractions-by-ibrahim-el-hage/sssss3zw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-fractions-by-ibrahim-el-hage/sssss3zw"/>
      <lastmod>2026-11-02T18:51:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-sections-of-cone-sphere-and-cylinder/sssss3z6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-cone-sphere-and-cylinder/sssss3z6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-cone-sphere-and-cylinder/sssss3z6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-cone-sphere-and-cylinder/sssss3z6"/>
      <lastmod>2026-11-02T17:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-sections-of-cone-sphere-and-cylinder/sssss3z6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-cone-sphere-and-cylinder/sssss3z6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-cone-sphere-and-cylinder/sssss3z6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-cone-sphere-and-cylinder/sssss3z6"/>
      <lastmod>2026-11-02T17:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-function-by-ken-schwartz/sssss3zg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function-by-ken-schwartz/sssss3zg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function-by-ken-schwartz/sssss3zg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function-by-ken-schwartz/sssss3zg"/>
      <lastmod>2026-11-02T16:44:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-function-by-ken-schwartz/sssss3zg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function-by-ken-schwartz/sssss3zg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function-by-ken-schwartz/sssss3zg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function-by-ken-schwartz/sssss3zg"/>
      <lastmod>2026-11-02T16:44:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/new-trig-identities-from-similar-right-triangles/sssss3z9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-trig-identities-from-similar-right-triangles/sssss3z9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-trig-identities-from-similar-right-triangles/sssss3z9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-trig-identities-from-similar-right-triangles/sssss3z9"/>
      <lastmod>2026-11-01T19:10:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/new-trig-identities-from-similar-right-triangles/sssss3z9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-trig-identities-from-similar-right-triangles/sssss3z9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-trig-identities-from-similar-right-triangles/sssss3z9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-trig-identities-from-similar-right-triangles/sssss3z9"/>
      <lastmod>2026-11-01T19:10:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-of-surface-about-x-axis/sssss3ze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-of-surface-about-x-axis/sssss3ze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-of-surface-about-x-axis/sssss3ze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-of-surface-about-x-axis/sssss3ze"/>
      <lastmod>2026-11-01T21:18:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-of-surface-about-x-axis/sssss3ze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-of-surface-about-x-axis/sssss3ze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-of-surface-about-x-axis/sssss3ze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-of-surface-about-x-axis/sssss3ze"/>
      <lastmod>2026-11-01T21:18:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-complex-number-multiplication/sssss3zv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-complex-number-multiplication/sssss3zv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-complex-number-multiplication/sssss3zv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-complex-number-multiplication/sssss3zv"/>
      <lastmod>2026-11-02T17:56:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-complex-number-multiplication/sssss3zv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-complex-number-multiplication/sssss3zv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-complex-number-multiplication/sssss3zv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-complex-number-multiplication/sssss3zv"/>
      <lastmod>2026-11-02T17:56:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-subtraction-on-number-line/sssss3z4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-on-number-line/sssss3z4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-on-number-line/sssss3z4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-on-number-line/sssss3z4"/>
      <lastmod>2026-11-01T21:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-subtraction-on-number-line/sssss3z4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-on-number-line/sssss3z4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-on-number-line/sssss3z4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-on-number-line/sssss3z4"/>
      <lastmod>2026-11-01T21:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equation-of-a-line-and-a-circle-focusing-on-change/sssss3zl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-a-line-and-a-circle-focusing-on-change/sssss3zl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-a-line-and-a-circle-focusing-on-change/sssss3zl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-a-line-and-a-circle-focusing-on-change/sssss3zl"/>
      <lastmod>2026-11-01T19:17:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equation-of-a-line-and-a-circle-focusing-on-change/sssss3zl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-a-line-and-a-circle-focusing-on-change/sssss3zl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-a-line-and-a-circle-focusing-on-change/sssss3zl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-a-line-and-a-circle-focusing-on-change/sssss3zl"/>
      <lastmod>2026-11-01T19:17:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shifting-cylinder-volume-demonstration/sssss3zy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shifting-cylinder-volume-demonstration/sssss3zy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shifting-cylinder-volume-demonstration/sssss3zy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shifting-cylinder-volume-demonstration/sssss3zy"/>
      <lastmod>2026-11-01T21:54:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shifting-cylinder-volume-demonstration/sssss3zy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shifting-cylinder-volume-demonstration/sssss3zy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shifting-cylinder-volume-demonstration/sssss3zy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shifting-cylinder-volume-demonstration/sssss3zy"/>
      <lastmod>2026-11-01T21:54:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-area-calculation/sssss3za</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-area-calculation/sssss3za"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-area-calculation/sssss3za"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-area-calculation/sssss3za"/>
      <lastmod>2026-11-01T20:58:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-area-calculation/sssss3za</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-area-calculation/sssss3za"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-area-calculation/sssss3za"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-area-calculation/sssss3za"/>
      <lastmod>2026-11-01T20:58:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lr7-01-xt1-midpoint-of-a-line-segment/sssss3zc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lr7-01-xt1-midpoint-of-a-line-segment/sssss3zc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lr7-01-xt1-midpoint-of-a-line-segment/sssss3zc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lr7-01-xt1-midpoint-of-a-line-segment/sssss3zc"/>
      <lastmod>2026-11-01T22:11:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lr7-01-xt1-midpoint-of-a-line-segment/sssss3zc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lr7-01-xt1-midpoint-of-a-line-segment/sssss3zc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lr7-01-xt1-midpoint-of-a-line-segment/sssss3zc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lr7-01-xt1-midpoint-of-a-line-segment/sssss3zc"/>
      <lastmod>2026-11-01T22:11:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/root-rectangles-and-light/sssss3zr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangles-and-light/sssss3zr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangles-and-light/sssss3zr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangles-and-light/sssss3zr"/>
      <lastmod>2026-11-01T23:25:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/root-rectangles-and-light/sssss3zr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangles-and-light/sssss3zr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangles-and-light/sssss3zr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangles-and-light/sssss3zr"/>
      <lastmod>2026-11-01T23:25:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-trig-practice-finding-acute-angles/sssss3zh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-trig-practice-finding-acute-angles/sssss3zh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-trig-practice-finding-acute-angles/sssss3zh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-trig-practice-finding-acute-angles/sssss3zh"/>
      <lastmod>2026-11-01T20:52:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-trig-practice-finding-acute-angles/sssss3zh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-trig-practice-finding-acute-angles/sssss3zh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-trig-practice-finding-acute-angles/sssss3zh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-trig-practice-finding-acute-angles/sssss3zh"/>
      <lastmod>2026-11-01T20:52:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-proof-of-the-cosine-law/sssss3zt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-proof-of-the-cosine-law/sssss3zt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-proof-of-the-cosine-law/sssss3zt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-proof-of-the-cosine-law/sssss3zt"/>
      <lastmod>2026-11-02T09:35:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-proof-of-the-cosine-law/sssss3zt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-proof-of-the-cosine-law/sssss3zt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-proof-of-the-cosine-law/sssss3zt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-proof-of-the-cosine-law/sssss3zt"/>
      <lastmod>2026-11-02T09:35:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-base-pyramid/sssss3zx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-base-pyramid/sssss3zx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-base-pyramid/sssss3zx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-base-pyramid/sssss3zx"/>
      <lastmod>2026-11-02T17:03:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-base-pyramid/sssss3zx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-base-pyramid/sssss3zx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-base-pyramid/sssss3zx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-base-pyramid/sssss3zx"/>
      <lastmod>2026-11-02T17:03:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/show-derivative/sssss3zi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/show-derivative/sssss3zi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/show-derivative/sssss3zi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/show-derivative/sssss3zi"/>
      <lastmod>2026-11-01T19:31:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/show-derivative/sssss3zi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/show-derivative/sssss3zi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/show-derivative/sssss3zi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/show-derivative/sssss3zi"/>
      <lastmod>2026-11-01T19:31:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/division-of-a-decimal-by-a-power-of-10/sssss3zo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-of-a-decimal-by-a-power-of-10/sssss3zo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-of-a-decimal-by-a-power-of-10/sssss3zo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-of-a-decimal-by-a-power-of-10/sssss3zo"/>
      <lastmod>2026-11-02T13:58:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/division-of-a-decimal-by-a-power-of-10/sssss3zo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-of-a-decimal-by-a-power-of-10/sssss3zo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-of-a-decimal-by-a-power-of-10/sssss3zo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-of-a-decimal-by-a-power-of-10/sssss3zo"/>
      <lastmod>2026-11-02T13:58:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruent-segments-via-transformations/sssss30s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-segments-via-transformations/sssss30s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-segments-via-transformations/sssss30s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-segments-via-transformations/sssss30s"/>
      <lastmod>2026-11-01T21:48:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruent-segments-via-transformations/sssss30s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-segments-via-transformations/sssss30s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-segments-via-transformations/sssss30s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-segments-via-transformations/sssss30s"/>
      <lastmod>2026-11-01T21:48:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-construction-of-perpendicular-bisector/sssss307</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-construction-of-perpendicular-bisector/sssss307"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-construction-of-perpendicular-bisector/sssss307"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-construction-of-perpendicular-bisector/sssss307"/>
      <lastmod>2026-11-02T11:51:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-construction-of-perpendicular-bisector/sssss307</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-construction-of-perpendicular-bisector/sssss307"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-construction-of-perpendicular-bisector/sssss307"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-construction-of-perpendicular-bisector/sssss307"/>
      <lastmod>2026-11-02T11:51:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-polygon-area-calculation/sssss30n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygon-area-calculation/sssss30n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygon-area-calculation/sssss30n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygon-area-calculation/sssss30n"/>
      <lastmod>2026-11-01T19:16:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-polygon-area-calculation/sssss30n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygon-area-calculation/sssss30n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygon-area-calculation/sssss30n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygon-area-calculation/sssss30n"/>
      <lastmod>2026-11-01T19:16:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-and-coordinate-geometry-example-in-geogebra/sssss302</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-coordinate-geometry-example-in-geogebra/sssss302"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-coordinate-geometry-example-in-geogebra/sssss302"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-coordinate-geometry-example-in-geogebra/sssss302"/>
      <lastmod>2026-11-01T21:11:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-and-coordinate-geometry-example-in-geogebra/sssss302</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-coordinate-geometry-example-in-geogebra/sssss302"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-coordinate-geometry-example-in-geogebra/sssss302"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-coordinate-geometry-example-in-geogebra/sssss302"/>
      <lastmod>2026-11-01T21:11:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-squares-on-a-screen/sssss30k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-squares-on-a-screen/sssss30k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-squares-on-a-screen/sssss30k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-squares-on-a-screen/sssss30k"/>
      <lastmod>2026-11-01T21:55:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-squares-on-a-screen/sssss30k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-squares-on-a-screen/sssss30k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-squares-on-a-screen/sssss30k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-squares-on-a-screen/sssss30k"/>
      <lastmod>2026-11-01T21:55:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-quiz-on-linear-inequalities-in-two-variables/sssss30z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-quiz-on-linear-inequalities-in-two-variables/sssss30z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-quiz-on-linear-inequalities-in-two-variables/sssss30z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-quiz-on-linear-inequalities-in-two-variables/sssss30z"/>
      <lastmod>2026-11-02T10:45:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-quiz-on-linear-inequalities-in-two-variables/sssss30z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-quiz-on-linear-inequalities-in-two-variables/sssss30z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-quiz-on-linear-inequalities-in-two-variables/sssss30z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-quiz-on-linear-inequalities-in-two-variables/sssss30z"/>
      <lastmod>2026-11-02T10:45:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angle-sum-of-a-polygon-is-360/sssss300</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angle-sum-of-a-polygon-is-360/sssss300"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angle-sum-of-a-polygon-is-360/sssss300"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angle-sum-of-a-polygon-is-360/sssss300"/>
      <lastmod>2026-11-01T19:05:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angle-sum-of-a-polygon-is-360/sssss300</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angle-sum-of-a-polygon-is-360/sssss300"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angle-sum-of-a-polygon-is-360/sssss300"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angle-sum-of-a-polygon-is-360/sssss300"/>
      <lastmod>2026-11-01T19:05:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/magic-six-times-table/sssss30d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magic-six-times-table/sssss30d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magic-six-times-table/sssss30d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magic-six-times-table/sssss30d"/>
      <lastmod>2026-11-01T19:12:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/magic-six-times-table/sssss30d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magic-six-times-table/sssss30d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magic-six-times-table/sssss30d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magic-six-times-table/sssss30d"/>
      <lastmod>2026-11-01T19:12:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-sequence-gaps/sssss30f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-gaps/sssss30f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-gaps/sssss30f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-gaps/sssss30f"/>
      <lastmod>2026-11-02T10:52:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-sequence-gaps/sssss30f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-gaps/sssss30f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-gaps/sssss30f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-gaps/sssss30f"/>
      <lastmod>2026-11-02T10:52:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumference-and-circle/sssss308</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumference-and-circle/sssss308"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumference-and-circle/sssss308"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumference-and-circle/sssss308"/>
      <lastmod>2026-11-02T02:18:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumference-and-circle/sssss308</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumference-and-circle/sssss308"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumference-and-circle/sssss308"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumference-and-circle/sssss308"/>
      <lastmod>2026-11-02T02:18:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/midpoint-of-a-line-segment-by-keegan/sssss30u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoint-of-a-line-segment-by-keegan/sssss30u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoint-of-a-line-segment-by-keegan/sssss30u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoint-of-a-line-segment-by-keegan/sssss30u"/>
      <lastmod>2026-11-02T18:22:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/midpoint-of-a-line-segment-by-keegan/sssss30u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoint-of-a-line-segment-by-keegan/sssss30u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoint-of-a-line-segment-by-keegan/sssss30u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoint-of-a-line-segment-by-keegan/sssss30u"/>
      <lastmod>2026-11-02T18:22:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-powers-of-the-unit-circle/sssss305</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-powers-of-the-unit-circle/sssss305"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-powers-of-the-unit-circle/sssss305"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-powers-of-the-unit-circle/sssss305"/>
      <lastmod>2026-11-02T16:43:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-powers-of-the-unit-circle/sssss305</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-powers-of-the-unit-circle/sssss305"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-powers-of-the-unit-circle/sssss305"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-powers-of-the-unit-circle/sssss305"/>
      <lastmod>2026-11-02T16:43:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-as-scaling-using-sliders/sssss30b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-as-scaling-using-sliders/sssss30b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-as-scaling-using-sliders/sssss30b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-as-scaling-using-sliders/sssss30b"/>
      <lastmod>2026-11-02T13:38:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-as-scaling-using-sliders/sssss30b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-as-scaling-using-sliders/sssss30b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-as-scaling-using-sliders/sssss30b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-as-scaling-using-sliders/sssss30b"/>
      <lastmod>2026-11-02T13:38:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-8-7-13-practice-definition-of-scientific-notation/sssss303</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-7-13-practice-definition-of-scientific-notation/sssss303"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-7-13-practice-definition-of-scientific-notation/sssss303"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-7-13-practice-definition-of-scientific-notation/sssss303"/>
      <lastmod>2026-11-01T22:51:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-8-7-13-practice-definition-of-scientific-notation/sssss303</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-7-13-practice-definition-of-scientific-notation/sssss303"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-7-13-practice-definition-of-scientific-notation/sssss303"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-7-13-practice-definition-of-scientific-notation/sssss303"/>
      <lastmod>2026-11-01T22:51:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-polar-connection/sssss30q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-polar-connection/sssss30q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-polar-connection/sssss30q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-polar-connection/sssss30q"/>
      <lastmod>2026-11-02T12:08:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-polar-connection/sssss30q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-polar-connection/sssss30q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-polar-connection/sssss30q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-polar-connection/sssss30q"/>
      <lastmod>2026-11-02T12:08:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiply-by-2-with-dice/sssss301</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiply-by-2-with-dice/sssss301"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiply-by-2-with-dice/sssss301"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiply-by-2-with-dice/sssss301"/>
      <lastmod>2026-11-01T19:32:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiply-by-2-with-dice/sssss301</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiply-by-2-with-dice/sssss301"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiply-by-2-with-dice/sssss301"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiply-by-2-with-dice/sssss301"/>
      <lastmod>2026-11-01T19:32:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-algebra-real-numbers-example/sssss30m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-algebra-real-numbers-example/sssss30m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-algebra-real-numbers-example/sssss30m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-algebra-real-numbers-example/sssss30m"/>
      <lastmod>2026-11-02T18:50:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-algebra-real-numbers-example/sssss30m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-algebra-real-numbers-example/sssss30m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-algebra-real-numbers-example/sssss30m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-algebra-real-numbers-example/sssss30m"/>
      <lastmod>2026-11-02T18:50:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-between-integers/sssss30j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-between-integers/sssss30j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-between-integers/sssss30j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-between-integers/sssss30j"/>
      <lastmod>2026-11-02T08:44:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-between-integers/sssss30j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-between-integers/sssss30j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-between-integers/sssss30j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-between-integers/sssss30j"/>
      <lastmod>2026-11-02T08:44:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shell-logo/sssss30p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shell-logo/sssss30p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shell-logo/sssss30p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shell-logo/sssss30p"/>
      <lastmod>2026-11-01T23:23:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shell-logo/sssss30p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shell-logo/sssss30p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shell-logo/sssss30p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shell-logo/sssss30p"/>
      <lastmod>2026-11-01T23:23:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilaterals-abcd-and-efgh-dilation/sssss30w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilaterals-abcd-and-efgh-dilation/sssss30w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilaterals-abcd-and-efgh-dilation/sssss30w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilaterals-abcd-and-efgh-dilation/sssss30w"/>
      <lastmod>2026-11-02T17:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilaterals-abcd-and-efgh-dilation/sssss30w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilaterals-abcd-and-efgh-dilation/sssss30w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilaterals-abcd-and-efgh-dilation/sssss30w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilaterals-abcd-and-efgh-dilation/sssss30w"/>
      <lastmod>2026-11-02T17:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-parallelogram-using-symmetries/sssss306</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-using-symmetries/sssss306"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallelogram-using-symmetries/sssss306"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-using-symmetries/sssss306"/>
      <lastmod>2026-11-02T03:06:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-parallelogram-using-symmetries/sssss306</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-using-symmetries/sssss306"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallelogram-using-symmetries/sssss306"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-using-symmetries/sssss306"/>
      <lastmod>2026-11-02T03:06:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-prism-tent-2/sssss30g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-tent-2/sssss30g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-tent-2/sssss30g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-tent-2/sssss30g"/>
      <lastmod>2026-11-02T18:19:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-prism-tent-2/sssss30g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-tent-2/sssss30g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-tent-2/sssss30g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-tent-2/sssss30g"/>
      <lastmod>2026-11-02T18:19:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-standard-form/sssss309</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-standard-form/sssss309"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-standard-form/sssss309"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-standard-form/sssss309"/>
      <lastmod>2026-11-02T18:21:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-standard-form/sssss309</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-standard-form/sssss309"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-standard-form/sssss309"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-standard-form/sssss309"/>
      <lastmod>2026-11-02T18:21:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformation-of-quadratic-functions/sssss30e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-of-quadratic-functions/sssss30e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-of-quadratic-functions/sssss30e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-of-quadratic-functions/sssss30e"/>
      <lastmod>2026-11-02T00:44:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformation-of-quadratic-functions/sssss30e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-of-quadratic-functions/sssss30e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-of-quadratic-functions/sssss30e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-of-quadratic-functions/sssss30e"/>
      <lastmod>2026-11-02T00:44:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-inside-the-torus/sssss30v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-inside-the-torus/sssss30v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-inside-the-torus/sssss30v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-inside-the-torus/sssss30v"/>
      <lastmod>2026-11-02T18:12:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-inside-the-torus/sssss30v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-inside-the-torus/sssss30v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-inside-the-torus/sssss30v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-inside-the-torus/sssss30v"/>
      <lastmod>2026-11-02T18:12:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hundred-grid-with-blank-spaces/sssss304</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hundred-grid-with-blank-spaces/sssss304"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hundred-grid-with-blank-spaces/sssss304"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hundred-grid-with-blank-spaces/sssss304"/>
      <lastmod>2026-11-02T15:38:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hundred-grid-with-blank-spaces/sssss304</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hundred-grid-with-blank-spaces/sssss304"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hundred-grid-with-blank-spaces/sssss304"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hundred-grid-with-blank-spaces/sssss304"/>
      <lastmod>2026-11-02T15:38:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-under-cycloide/sssss30l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-cycloide/sssss30l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-cycloide/sssss30l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-cycloide/sssss30l"/>
      <lastmod>2026-11-01T20:41:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-under-cycloide/sssss30l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-cycloide/sssss30l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-cycloide/sssss30l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-cycloide/sssss30l"/>
      <lastmod>2026-11-01T20:41:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-real-roots-of-a-parabola/sssss30y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-real-roots-of-a-parabola/sssss30y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-real-roots-of-a-parabola/sssss30y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-real-roots-of-a-parabola/sssss30y"/>
      <lastmod>2026-11-02T02:29:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-real-roots-of-a-parabola/sssss30y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-real-roots-of-a-parabola/sssss30y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-real-roots-of-a-parabola/sssss30y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-real-roots-of-a-parabola/sssss30y"/>
      <lastmod>2026-11-02T02:29:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-quadratic-equations-quadratic-formula/sssss30a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-quadratic-formula/sssss30a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-quadratic-formula/sssss30a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-quadratic-formula/sssss30a"/>
      <lastmod>2026-11-02T02:40:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-quadratic-equations-quadratic-formula/sssss30a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-quadratic-formula/sssss30a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-quadratic-formula/sssss30a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-quadratic-formula/sssss30a"/>
      <lastmod>2026-11-02T02:40:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylindrical-and-spherical-coordinates/sssss30c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-and-spherical-coordinates/sssss30c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-and-spherical-coordinates/sssss30c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-and-spherical-coordinates/sssss30c"/>
      <lastmod>2026-11-02T18:27:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylindrical-and-spherical-coordinates/sssss30c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-and-spherical-coordinates/sssss30c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-and-spherical-coordinates/sssss30c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-and-spherical-coordinates/sssss30c"/>
      <lastmod>2026-11-02T18:27:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rounding-to-the-nearest-10-or-100/sssss30r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rounding-to-the-nearest-10-or-100/sssss30r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rounding-to-the-nearest-10-or-100/sssss30r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rounding-to-the-nearest-10-or-100/sssss30r"/>
      <lastmod>2026-11-02T13:37:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rounding-to-the-nearest-10-or-100/sssss30r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rounding-to-the-nearest-10-or-100/sssss30r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rounding-to-the-nearest-10-or-100/sssss30r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rounding-to-the-nearest-10-or-100/sssss30r"/>
      <lastmod>2026-11-02T13:37:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ps-2-logo/sssss30h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ps-2-logo/sssss30h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ps-2-logo/sssss30h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ps-2-logo/sssss30h"/>
      <lastmod>2026-11-01T23:10:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ps-2-logo/sssss30h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ps-2-logo/sssss30h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ps-2-logo/sssss30h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ps-2-logo/sssss30h"/>
      <lastmod>2026-11-01T23:10:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-variable-function-mapping-diagrams-and-solving-real-cubic-equations/sssss30t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-variable-function-mapping-diagrams-and-solving-real-cubic-equations/sssss30t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-variable-function-mapping-diagrams-and-solving-real-cubic-equations/sssss30t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-variable-function-mapping-diagrams-and-solving-real-cubic-equations/sssss30t"/>
      <lastmod>2026-11-02T17:01:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-variable-function-mapping-diagrams-and-solving-real-cubic-equations/sssss30t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-variable-function-mapping-diagrams-and-solving-real-cubic-equations/sssss30t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-variable-function-mapping-diagrams-and-solving-real-cubic-equations/sssss30t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-variable-function-mapping-diagrams-and-solving-real-cubic-equations/sssss30t"/>
      <lastmod>2026-11-02T17:01:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fermat-point-construction-by-bernat/sssss30x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fermat-point-construction-by-bernat/sssss30x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fermat-point-construction-by-bernat/sssss30x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fermat-point-construction-by-bernat/sssss30x"/>
      <lastmod>2026-11-02T06:08:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fermat-point-construction-by-bernat/sssss30x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fermat-point-construction-by-bernat/sssss30x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fermat-point-construction-by-bernat/sssss30x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fermat-point-construction-by-bernat/sssss30x"/>
      <lastmod>2026-11-02T06:08:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-spreadsheet-tools-for-data-analysis/sssss30i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-spreadsheet-tools-for-data-analysis/sssss30i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-spreadsheet-tools-for-data-analysis/sssss30i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-spreadsheet-tools-for-data-analysis/sssss30i"/>
      <lastmod>2026-11-02T06:43:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-spreadsheet-tools-for-data-analysis/sssss30i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-spreadsheet-tools-for-data-analysis/sssss30i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-spreadsheet-tools-for-data-analysis/sssss30i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-spreadsheet-tools-for-data-analysis/sssss30i"/>
      <lastmod>2026-11-02T06:43:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-tracing/sssss30o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-tracing/sssss30o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-tracing/sssss30o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-tracing/sssss30o"/>
      <lastmod>2026-11-01T21:20:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-tracing/sssss30o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-tracing/sssss30o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-tracing/sssss30o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-tracing/sssss30o"/>
      <lastmod>2026-11-01T21:20:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/write-the-equation-of-the-parabola/sssss3ds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-the-equation-of-the-parabola/sssss3ds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-the-equation-of-the-parabola/sssss3ds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-the-equation-of-the-parabola/sssss3ds"/>
      <lastmod>2026-11-02T15:17:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/write-the-equation-of-the-parabola/sssss3ds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-the-equation-of-the-parabola/sssss3ds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-the-equation-of-the-parabola/sssss3ds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-the-equation-of-the-parabola/sssss3ds"/>
      <lastmod>2026-11-02T15:17:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/non-square-rhombus-by-421302/sssss3d7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-421302/sssss3d7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-square-rhombus-by-421302/sssss3d7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-421302/sssss3d7"/>
      <lastmod>2026-11-02T17:57:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/non-square-rhombus-by-421302/sssss3d7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-421302/sssss3d7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-square-rhombus-by-421302/sssss3d7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-421302/sssss3d7"/>
      <lastmod>2026-11-02T17:57:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transitive-property-demo/sssss3dn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transitive-property-demo/sssss3dn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transitive-property-demo/sssss3dn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transitive-property-demo/sssss3dn"/>
      <lastmod>2026-11-02T00:17:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transitive-property-demo/sssss3dn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transitive-property-demo/sssss3dn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transitive-property-demo/sssss3dn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transitive-property-demo/sssss3dn"/>
      <lastmod>2026-11-02T00:17:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/b4-1-sphere-exploring-natural-numbers-equations-and-parametric-curves-in-so/sssss3d2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/b4-1-sphere-exploring-natural-numbers-equations-and-parametric-curves-in-so/sssss3d2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/b4-1-sphere-exploring-natural-numbers-equations-and-parametric-curves-in-so/sssss3d2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/b4-1-sphere-exploring-natural-numbers-equations-and-parametric-curves-in-so/sssss3d2"/>
      <lastmod>2026-11-02T00:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/b4-1-sphere-exploring-natural-numbers-equations-and-parametric-curves-in-so/sssss3d2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/b4-1-sphere-exploring-natural-numbers-equations-and-parametric-curves-in-so/sssss3d2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/b4-1-sphere-exploring-natural-numbers-equations-and-parametric-curves-in-so/sssss3d2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/b4-1-sphere-exploring-natural-numbers-equations-and-parametric-curves-in-so/sssss3d2"/>
      <lastmod>2026-11-02T00:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperboloid-views/sssss3dk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloid-views/sssss3dk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloid-views/sssss3dk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloid-views/sssss3dk"/>
      <lastmod>2026-11-01T19:11:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperboloid-views/sssss3dk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloid-views/sssss3dk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloid-views/sssss3dk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloid-views/sssss3dk"/>
      <lastmod>2026-11-01T19:11:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trig-graphs-and-the-unit-circle-dynamic-visualization/sssss3dz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-graphs-and-the-unit-circle-dynamic-visualization/sssss3dz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-graphs-and-the-unit-circle-dynamic-visualization/sssss3dz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-graphs-and-the-unit-circle-dynamic-visualization/sssss3dz"/>
      <lastmod>2026-11-01T21:32:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trig-graphs-and-the-unit-circle-dynamic-visualization/sssss3dz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-graphs-and-the-unit-circle-dynamic-visualization/sssss3dz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-graphs-and-the-unit-circle-dynamic-visualization/sssss3dz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-graphs-and-the-unit-circle-dynamic-visualization/sssss3dz"/>
      <lastmod>2026-11-01T21:32:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/revolution-volume-integration-demo/sssss3d0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/revolution-volume-integration-demo/sssss3d0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/revolution-volume-integration-demo/sssss3d0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/revolution-volume-integration-demo/sssss3d0"/>
      <lastmod>2026-11-01T19:07:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/revolution-volume-integration-demo/sssss3d0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/revolution-volume-integration-demo/sssss3d0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/revolution-volume-integration-demo/sssss3d0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/revolution-volume-integration-demo/sssss3d0"/>
      <lastmod>2026-11-01T19:07:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-planes-intersection-demo/sssss3dd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-planes-intersection-demo/sssss3dd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-planes-intersection-demo/sssss3dd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-planes-intersection-demo/sssss3dd"/>
      <lastmod>2026-11-02T12:12:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-planes-intersection-demo/sssss3dd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-planes-intersection-demo/sssss3dd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-planes-intersection-demo/sssss3dd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-planes-intersection-demo/sssss3dd"/>
      <lastmod>2026-11-02T12:12:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/piecewise-linear-function-visualizing-domain-and-range/sssss3df</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piecewise-linear-function-visualizing-domain-and-range/sssss3df"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piecewise-linear-function-visualizing-domain-and-range/sssss3df"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piecewise-linear-function-visualizing-domain-and-range/sssss3df"/>
      <lastmod>2026-11-01T20:51:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/piecewise-linear-function-visualizing-domain-and-range/sssss3df</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piecewise-linear-function-visualizing-domain-and-range/sssss3df"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piecewise-linear-function-visualizing-domain-and-range/sssss3df"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piecewise-linear-function-visualizing-domain-and-range/sssss3df"/>
      <lastmod>2026-11-01T20:51:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/set-union-and-intersection-visual-quiz/sssss3d8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-union-and-intersection-visual-quiz/sssss3d8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-union-and-intersection-visual-quiz/sssss3d8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-union-and-intersection-visual-quiz/sssss3d8"/>
      <lastmod>2026-11-02T00:32:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/set-union-and-intersection-visual-quiz/sssss3d8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-union-and-intersection-visual-quiz/sssss3d8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-union-and-intersection-visual-quiz/sssss3d8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-union-and-intersection-visual-quiz/sssss3d8"/>
      <lastmod>2026-11-02T00:32:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/girig-tiles-and-decorative-patterns/sssss3du</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/girig-tiles-and-decorative-patterns/sssss3du"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/girig-tiles-and-decorative-patterns/sssss3du"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/girig-tiles-and-decorative-patterns/sssss3du"/>
      <lastmod>2026-11-02T07:04:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/girig-tiles-and-decorative-patterns/sssss3du</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/girig-tiles-and-decorative-patterns/sssss3du"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/girig-tiles-and-decorative-patterns/sssss3du"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/girig-tiles-and-decorative-patterns/sssss3du"/>
      <lastmod>2026-11-02T07:04:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-to-parallelogram/sssss3d5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-to-parallelogram/sssss3d5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-to-parallelogram/sssss3d5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-to-parallelogram/sssss3d5"/>
      <lastmod>2026-11-01T21:24:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-to-parallelogram/sssss3d5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-to-parallelogram/sssss3d5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-to-parallelogram/sssss3d5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-to-parallelogram/sssss3d5"/>
      <lastmod>2026-11-01T21:24:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/projection-of-a-cube-onto-a-plane/sssss3db</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projection-of-a-cube-onto-a-plane/sssss3db"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projection-of-a-cube-onto-a-plane/sssss3db"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projection-of-a-cube-onto-a-plane/sssss3db"/>
      <lastmod>2026-11-02T08:59:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/projection-of-a-cube-onto-a-plane/sssss3db</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projection-of-a-cube-onto-a-plane/sssss3db"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projection-of-a-cube-onto-a-plane/sssss3db"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projection-of-a-cube-onto-a-plane/sssss3db"/>
      <lastmod>2026-11-02T08:59:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/270-degree-counterclockwise-rotation/sssss3d3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/270-degree-counterclockwise-rotation/sssss3d3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/270-degree-counterclockwise-rotation/sssss3d3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/270-degree-counterclockwise-rotation/sssss3d3"/>
      <lastmod>2026-11-02T12:42:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/270-degree-counterclockwise-rotation/sssss3d3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/270-degree-counterclockwise-rotation/sssss3d3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/270-degree-counterclockwise-rotation/sssss3d3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/270-degree-counterclockwise-rotation/sssss3d3"/>
      <lastmod>2026-11-02T12:42:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/train-problem-geometry-demo/sssss3dq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/train-problem-geometry-demo/sssss3dq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/train-problem-geometry-demo/sssss3dq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/train-problem-geometry-demo/sssss3dq"/>
      <lastmod>2026-11-02T17:36:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/train-problem-geometry-demo/sssss3dq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/train-problem-geometry-demo/sssss3dq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/train-problem-geometry-demo/sssss3dq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/train-problem-geometry-demo/sssss3dq"/>
      <lastmod>2026-11-02T17:36:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-concurrent-relationships-in-any-hexagon/sssss3d1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-concurrent-relationships-in-any-hexagon/sssss3d1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-concurrent-relationships-in-any-hexagon/sssss3d1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-concurrent-relationships-in-any-hexagon/sssss3d1"/>
      <lastmod>2026-11-02T17:13:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-concurrent-relationships-in-any-hexagon/sssss3d1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-concurrent-relationships-in-any-hexagon/sssss3d1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-concurrent-relationships-in-any-hexagon/sssss3d1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-concurrent-relationships-in-any-hexagon/sssss3d1"/>
      <lastmod>2026-11-02T17:13:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kalman-filter-and-orthogonal-projections-a-geometric-visualization/sssss3dm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kalman-filter-and-orthogonal-projections-a-geometric-visualization/sssss3dm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kalman-filter-and-orthogonal-projections-a-geometric-visualization/sssss3dm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kalman-filter-and-orthogonal-projections-a-geometric-visualization/sssss3dm"/>
      <lastmod>2026-11-02T17:57:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kalman-filter-and-orthogonal-projections-a-geometric-visualization/sssss3dm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kalman-filter-and-orthogonal-projections-a-geometric-visualization/sssss3dm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kalman-filter-and-orthogonal-projections-a-geometric-visualization/sssss3dm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kalman-filter-and-orthogonal-projections-a-geometric-visualization/sssss3dm"/>
      <lastmod>2026-11-02T17:57:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/heat-equation-demonstration/sssss3dj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heat-equation-demonstration/sssss3dj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heat-equation-demonstration/sssss3dj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heat-equation-demonstration/sssss3dj"/>
      <lastmod>2026-11-02T18:56:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/heat-equation-demonstration/sssss3dj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heat-equation-demonstration/sssss3dj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heat-equation-demonstration/sssss3dj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heat-equation-demonstration/sssss3dj"/>
      <lastmod>2026-11-02T18:56:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-derivatives-dynamic-illustrator/sssss3dp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivatives-dynamic-illustrator/sssss3dp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivatives-dynamic-illustrator/sssss3dp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivatives-dynamic-illustrator/sssss3dp"/>
      <lastmod>2026-11-02T16:51:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-derivatives-dynamic-illustrator/sssss3dp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivatives-dynamic-illustrator/sssss3dp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivatives-dynamic-illustrator/sssss3dp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivatives-dynamic-illustrator/sssss3dp"/>
      <lastmod>2026-11-02T16:51:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubic-doubling-by-archimedes/sssss3dw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-doubling-by-archimedes/sssss3dw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-doubling-by-archimedes/sssss3dw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-doubling-by-archimedes/sssss3dw"/>
      <lastmod>2026-11-02T16:51:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubic-doubling-by-archimedes/sssss3dw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-doubling-by-archimedes/sssss3dw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-doubling-by-archimedes/sssss3dw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-doubling-by-archimedes/sssss3dw"/>
      <lastmod>2026-11-02T16:51:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-cross-section-comparison/sssss3d6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-cross-section-comparison/sssss3d6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-cross-section-comparison/sssss3d6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-cross-section-comparison/sssss3d6"/>
      <lastmod>2026-11-02T08:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-cross-section-comparison/sssss3d6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-cross-section-comparison/sssss3d6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-cross-section-comparison/sssss3d6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-cross-section-comparison/sssss3d6"/>
      <lastmod>2026-11-02T08:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-slider/sssss3dg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-slider/sssss3dg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-slider/sssss3dg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-slider/sssss3dg"/>
      <lastmod>2026-11-02T13:33:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-slider/sssss3dg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-slider/sssss3dg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-slider/sssss3dg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-slider/sssss3dg"/>
      <lastmod>2026-11-02T13:33:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-quadrilateral-theorem-2/sssss3d9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-quadrilateral-theorem-2/sssss3d9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-quadrilateral-theorem-2/sssss3d9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-quadrilateral-theorem-2/sssss3d9"/>
      <lastmod>2026-11-02T12:02:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-quadrilateral-theorem-2/sssss3d9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-quadrilateral-theorem-2/sssss3d9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-quadrilateral-theorem-2/sssss3d9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-quadrilateral-theorem-2/sssss3d9"/>
      <lastmod>2026-11-02T12:02:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-area-and-partial-volume-in-2d-by-ron-van-den-burg-2/sssss3de</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-2/sssss3de"/>
      <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-2/sssss3de"/>
      <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-2/sssss3de"/>
      <lastmod>2026-11-02T03:13:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-area-and-partial-volume-in-2d-by-ron-van-den-burg-2/sssss3de</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-2/sssss3de"/>
      <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-2/sssss3de"/>
      <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-2/sssss3de"/>
      <lastmod>2026-11-02T03:13:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-fractions-circles-and-sequences-for-numerator-denominator/sssss3dv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-fractions-circles-and-sequences-for-numerator-denominator/sssss3dv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-fractions-circles-and-sequences-for-numerator-denominator/sssss3dv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-fractions-circles-and-sequences-for-numerator-denominator/sssss3dv"/>
      <lastmod>2026-11-01T22:06:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-fractions-circles-and-sequences-for-numerator-denominator/sssss3dv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-fractions-circles-and-sequences-for-numerator-denominator/sssss3dv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-fractions-circles-and-sequences-for-numerator-denominator/sssss3dv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-fractions-circles-and-sequences-for-numerator-denominator/sssss3dv"/>
      <lastmod>2026-11-01T22:06:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-functions-slope-intercept-and-dynamic-exploration/sssss3d4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-functions-slope-intercept-and-dynamic-exploration/sssss3d4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-functions-slope-intercept-and-dynamic-exploration/sssss3d4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-functions-slope-intercept-and-dynamic-exploration/sssss3d4"/>
      <lastmod>2026-11-02T18:14:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-functions-slope-intercept-and-dynamic-exploration/sssss3d4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-functions-slope-intercept-and-dynamic-exploration/sssss3d4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-functions-slope-intercept-and-dynamic-exploration/sssss3d4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-functions-slope-intercept-and-dynamic-exploration/sssss3d4"/>
      <lastmod>2026-11-02T18:14:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dyme-2-5-with-numbers/sssss3dl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dyme-2-5-with-numbers/sssss3dl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dyme-2-5-with-numbers/sssss3dl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dyme-2-5-with-numbers/sssss3dl"/>
      <lastmod>2026-11-01T21:24:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dyme-2-5-with-numbers/sssss3dl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dyme-2-5-with-numbers/sssss3dl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dyme-2-5-with-numbers/sssss3dl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dyme-2-5-with-numbers/sssss3dl"/>
      <lastmod>2026-11-01T21:24:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/glide-reflection-tool-demo/sssss3dy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/glide-reflection-tool-demo/sssss3dy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/glide-reflection-tool-demo/sssss3dy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/glide-reflection-tool-demo/sssss3dy"/>
      <lastmod>2026-11-01T23:28:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/glide-reflection-tool-demo/sssss3dy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/glide-reflection-tool-demo/sssss3dy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/glide-reflection-tool-demo/sssss3dy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/glide-reflection-tool-demo/sssss3dy"/>
      <lastmod>2026-11-01T23:28:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-interpretation-of-lcm-and-gcd/sssss3da</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-lcm-and-gcd/sssss3da"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-interpretation-of-lcm-and-gcd/sssss3da"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-lcm-and-gcd/sssss3da"/>
      <lastmod>2026-11-02T17:57:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-interpretation-of-lcm-and-gcd/sssss3da</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-lcm-and-gcd/sssss3da"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-interpretation-of-lcm-and-gcd/sssss3da"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-lcm-and-gcd/sssss3da"/>
      <lastmod>2026-11-02T17:57:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-trig-functions-demo/sssss3dc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-trig-functions-demo/sssss3dc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-trig-functions-demo/sssss3dc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-trig-functions-demo/sssss3dc"/>
      <lastmod>2026-11-02T00:36:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-trig-functions-demo/sssss3dc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-trig-functions-demo/sssss3dc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-trig-functions-demo/sssss3dc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-trig-functions-demo/sssss3dc"/>
      <lastmod>2026-11-02T00:36:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-solid-volume-shell-method/sssss3dr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-solid-volume-shell-method/sssss3dr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-solid-volume-shell-method/sssss3dr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-solid-volume-shell-method/sssss3dr"/>
      <lastmod>2026-11-02T18:39:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-solid-volume-shell-method/sssss3dr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-solid-volume-shell-method/sssss3dr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-solid-volume-shell-method/sssss3dr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-solid-volume-shell-method/sssss3dr"/>
      <lastmod>2026-11-02T18:39:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-rule-demonstration/sssss3dh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-rule-demonstration/sssss3dh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-rule-demonstration/sssss3dh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-rule-demonstration/sssss3dh"/>
      <lastmod>2026-11-01T21:37:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-rule-demonstration/sssss3dh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-rule-demonstration/sssss3dh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-rule-demonstration/sssss3dh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-rule-demonstration/sssss3dh"/>
      <lastmod>2026-11-01T21:37:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-coordinates-robphy-3d-visualization/sssss3dt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-robphy-3d-visualization/sssss3dt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-robphy-3d-visualization/sssss3dt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-robphy-3d-visualization/sssss3dt"/>
      <lastmod>2026-11-02T08:34:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-coordinates-robphy-3d-visualization/sssss3dt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-robphy-3d-visualization/sssss3dt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-robphy-3d-visualization/sssss3dt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-robphy-3d-visualization/sssss3dt"/>
      <lastmod>2026-11-02T08:34:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-regression-page-3/sssss3dx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-page-3/sssss3dx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-page-3/sssss3dx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-page-3/sssss3dx"/>
      <lastmod>2026-11-01T23:59:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-regression-page-3/sssss3dx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-page-3/sssss3dx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-page-3/sssss3dx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-page-3/sssss3dx"/>
      <lastmod>2026-11-01T23:59:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-fractions-fix/sssss3di</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-fractions-fix/sssss3di"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-fractions-fix/sssss3di"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-fractions-fix/sssss3di"/>
      <lastmod>2026-11-02T12:08:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-fractions-fix/sssss3di</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-fractions-fix/sssss3di"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-fractions-fix/sssss3di"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-fractions-fix/sssss3di"/>
      <lastmod>2026-11-02T12:08:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bayes-theorem-visualization/sssss3do</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bayes-theorem-visualization/sssss3do"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bayes-theorem-visualization/sssss3do"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bayes-theorem-visualization/sssss3do"/>
      <lastmod>2026-11-01T19:00:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bayes-theorem-visualization/sssss3do</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bayes-theorem-visualization/sssss3do"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bayes-theorem-visualization/sssss3do"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bayes-theorem-visualization/sssss3do"/>
      <lastmod>2026-11-01T19:00:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-4-fractions-of-ropes/sssss3fs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-4-fractions-of-ropes/sssss3fs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-4-fractions-of-ropes/sssss3fs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-4-fractions-of-ropes/sssss3fs"/>
      <lastmod>2026-11-02T12:26:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-4-fractions-of-ropes/sssss3fs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-4-fractions-of-ropes/sssss3fs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-4-fractions-of-ropes/sssss3fs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-4-fractions-of-ropes/sssss3fs"/>
      <lastmod>2026-11-02T12:26:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-in-origin-scored-practice/sssss3f7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-origin-scored-practice/sssss3f7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-origin-scored-practice/sssss3f7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-origin-scored-practice/sssss3f7"/>
      <lastmod>2026-11-02T00:48:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-in-origin-scored-practice/sssss3f7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-origin-scored-practice/sssss3f7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-origin-scored-practice/sssss3f7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-origin-scored-practice/sssss3f7"/>
      <lastmod>2026-11-02T00:48:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/activity-4-the-basics-of-sine-and-cosine/sssss3fn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-4-the-basics-of-sine-and-cosine/sssss3fn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-4-the-basics-of-sine-and-cosine/sssss3fn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-4-the-basics-of-sine-and-cosine/sssss3fn"/>
      <lastmod>2026-11-01T21:31:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/activity-4-the-basics-of-sine-and-cosine/sssss3fn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-4-the-basics-of-sine-and-cosine/sssss3fn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-4-the-basics-of-sine-and-cosine/sssss3fn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-4-the-basics-of-sine-and-cosine/sssss3fn"/>
      <lastmod>2026-11-01T21:31:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/statistics-histograms-and-frequency-tables/sssss3f2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-histograms-and-frequency-tables/sssss3f2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-histograms-and-frequency-tables/sssss3f2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-histograms-and-frequency-tables/sssss3f2"/>
      <lastmod>2026-11-02T18:03:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/statistics-histograms-and-frequency-tables/sssss3f2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-histograms-and-frequency-tables/sssss3f2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-histograms-and-frequency-tables/sssss3f2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-histograms-and-frequency-tables/sssss3f2"/>
      <lastmod>2026-11-02T18:03:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-solution/sssss3fk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-solution/sssss3fk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-solution/sssss3fk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-solution/sssss3fk"/>
      <lastmod>2026-11-02T18:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-solution/sssss3fk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-solution/sssss3fk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-solution/sssss3fk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-solution/sssss3fk"/>
      <lastmod>2026-11-02T18:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-quadratic-functions-standard-form/sssss3fz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-quadratic-functions-standard-form/sssss3fz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-quadratic-functions-standard-form/sssss3fz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-quadratic-functions-standard-form/sssss3fz"/>
      <lastmod>2026-11-02T17:53:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-quadratic-functions-standard-form/sssss3fz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-quadratic-functions-standard-form/sssss3fz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-quadratic-functions-standard-form/sssss3fz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-quadratic-functions-standard-form/sssss3fz"/>
      <lastmod>2026-11-02T17:53:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-demonstration-by-cuauhtemoc-herrera/sssss3f0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-demonstration-by-cuauhtemoc-herrera/sssss3f0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-demonstration-by-cuauhtemoc-herrera/sssss3f0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-demonstration-by-cuauhtemoc-herrera/sssss3f0"/>
      <lastmod>2026-11-01T21:07:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-demonstration-by-cuauhtemoc-herrera/sssss3f0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-demonstration-by-cuauhtemoc-herrera/sssss3f0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-demonstration-by-cuauhtemoc-herrera/sssss3f0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-demonstration-by-cuauhtemoc-herrera/sssss3f0"/>
      <lastmod>2026-11-01T21:07:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-three-cuboids/sssss3fd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-three-cuboids/sssss3fd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-three-cuboids/sssss3fd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-three-cuboids/sssss3fd"/>
      <lastmod>2026-11-01T20:42:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-three-cuboids/sssss3fd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-three-cuboids/sssss3fd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-three-cuboids/sssss3fd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-three-cuboids/sssss3fd"/>
      <lastmod>2026-11-01T20:42:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-game-c/sssss3ff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-game-c/sssss3ff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-game-c/sssss3ff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-game-c/sssss3ff"/>
      <lastmod>2026-11-02T03:01:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-game-c/sssss3ff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-game-c/sssss3ff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-game-c/sssss3ff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-game-c/sssss3ff"/>
      <lastmod>2026-11-02T03:01:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-sections-investigation/sssss3f8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-sections-investigation/sssss3f8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-sections-investigation/sssss3f8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-sections-investigation/sssss3f8"/>
      <lastmod>2026-11-01T23:20:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-sections-investigation/sssss3f8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-sections-investigation/sssss3f8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-sections-investigation/sssss3f8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-sections-investigation/sssss3f8"/>
      <lastmod>2026-11-01T23:20:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-of-directed-numbers-practice-interactive-positive-negative-number-ad/sssss3fu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-directed-numbers-practice-interactive-positive-negative-number-ad/sssss3fu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-directed-numbers-practice-interactive-positive-negative-number-ad/sssss3fu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-directed-numbers-practice-interactive-positive-negative-number-ad/sssss3fu"/>
      <lastmod>2026-11-01T19:21:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-of-directed-numbers-practice-interactive-positive-negative-number-ad/sssss3fu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-directed-numbers-practice-interactive-positive-negative-number-ad/sssss3fu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-directed-numbers-practice-interactive-positive-negative-number-ad/sssss3fu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-directed-numbers-practice-interactive-positive-negative-number-ad/sssss3fu"/>
      <lastmod>2026-11-01T19:21:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-1-sssss0zk/sssss3f5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-1-sssss0zk/sssss3f5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-1-sssss0zk/sssss3f5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-1-sssss0zk/sssss3f5"/>
      <lastmod>2026-11-02T18:38:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-1-sssss0zk/sssss3f5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-1-sssss0zk/sssss3f5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-1-sssss0zk/sssss3f5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-1-sssss0zk/sssss3f5"/>
      <lastmod>2026-11-02T18:38:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-frustum-from-a-cone/sssss3fb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-frustum-from-a-cone/sssss3fb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-volume-of-a-frustum-from-a-cone/sssss3fb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-frustum-from-a-cone/sssss3fb"/>
      <lastmod>2026-11-02T18:01:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-and-volume-of-a-frustum-from-a-cone/sssss3fb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-frustum-from-a-cone/sssss3fb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-volume-of-a-frustum-from-a-cone/sssss3fb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-frustum-from-a-cone/sssss3fb"/>
      <lastmod>2026-11-02T18:01:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-sine-cosine-and-secant-on-the-unit-circle/sssss3f3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-sine-cosine-and-secant-on-the-unit-circle/sssss3f3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-sine-cosine-and-secant-on-the-unit-circle/sssss3f3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-sine-cosine-and-secant-on-the-unit-circle/sssss3f3"/>
      <lastmod>2026-11-01T19:16:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-sine-cosine-and-secant-on-the-unit-circle/sssss3f3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-sine-cosine-and-secant-on-the-unit-circle/sssss3f3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-sine-cosine-and-secant-on-the-unit-circle/sssss3f3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-sine-cosine-and-secant-on-the-unit-circle/sssss3f3"/>
      <lastmod>2026-11-01T19:16:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-p3/sssss3fq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-p3/sssss3fq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallpaper-symmetry-group-p3/sssss3fq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-p3/sssss3fq"/>
      <lastmod>2026-11-02T13:34:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wallpaper-symmetry-group-p3/sssss3fq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-p3/sssss3fq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallpaper-symmetry-group-p3/sssss3fq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-p3/sssss3fq"/>
      <lastmod>2026-11-02T13:34:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-extreme-points-and-derivative-examination/sssss3f1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-extreme-points-and-derivative-examination/sssss3f1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-extreme-points-and-derivative-examination/sssss3f1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-extreme-points-and-derivative-examination/sssss3f1"/>
      <lastmod>2026-11-02T16:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-extreme-points-and-derivative-examination/sssss3f1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-extreme-points-and-derivative-examination/sssss3f1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-extreme-points-and-derivative-examination/sssss3f1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-extreme-points-and-derivative-examination/sssss3f1"/>
      <lastmod>2026-11-02T16:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-conical-frustum/sssss3fm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-conical-frustum/sssss3fm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-conical-frustum/sssss3fm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-conical-frustum/sssss3fm"/>
      <lastmod>2026-11-02T16:44:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-conical-frustum/sssss3fm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-conical-frustum/sssss3fm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-conical-frustum/sssss3fm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-conical-frustum/sssss3fm"/>
      <lastmod>2026-11-02T16:44:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/component-vectors/sssss3fj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/component-vectors/sssss3fj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/component-vectors/sssss3fj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/component-vectors/sssss3fj"/>
      <lastmod>2026-11-02T18:19:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/component-vectors/sssss3fj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/component-vectors/sssss3fj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/component-vectors/sssss3fj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/component-vectors/sssss3fj"/>
      <lastmod>2026-11-02T18:19:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/smartboard-dartboard-coordinates/sssss3fp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smartboard-dartboard-coordinates/sssss3fp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smartboard-dartboard-coordinates/sssss3fp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smartboard-dartboard-coordinates/sssss3fp"/>
      <lastmod>2026-11-02T16:44:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/smartboard-dartboard-coordinates/sssss3fp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smartboard-dartboard-coordinates/sssss3fp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smartboard-dartboard-coordinates/sssss3fp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smartboard-dartboard-coordinates/sssss3fp"/>
      <lastmod>2026-11-02T16:44:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-exact-values-sssssxyn/sssss3fw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exact-values-sssssxyn/sssss3fw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exact-values-sssssxyn/sssss3fw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exact-values-sssssxyn/sssss3fw"/>
      <lastmod>2026-11-01T21:33:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-exact-values-sssssxyn/sssss3fw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exact-values-sssssxyn/sssss3fw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exact-values-sssssxyn/sssss3fw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exact-values-sssssxyn/sssss3fw"/>
      <lastmod>2026-11-01T21:33:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-inequalities-by-vrvm8/sssss3f6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-inequalities-by-vrvm8/sssss3f6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-inequalities-by-vrvm8/sssss3f6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-inequalities-by-vrvm8/sssss3f6"/>
      <lastmod>2026-11-02T09:42:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-inequalities-by-vrvm8/sssss3f6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-inequalities-by-vrvm8/sssss3f6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-inequalities-by-vrvm8/sssss3f6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-inequalities-by-vrvm8/sssss3f6"/>
      <lastmod>2026-11-02T09:42:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-lines-by-edward-james-kirk/sssss3fg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines-by-edward-james-kirk/sssss3fg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines-by-edward-james-kirk/sssss3fg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines-by-edward-james-kirk/sssss3fg"/>
      <lastmod>2026-11-02T17:01:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-lines-by-edward-james-kirk/sssss3fg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines-by-edward-james-kirk/sssss3fg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines-by-edward-james-kirk/sssss3fg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines-by-edward-james-kirk/sssss3fg"/>
      <lastmod>2026-11-02T17:01:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/semicircle-example/sssss3f9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/semicircle-example/sssss3f9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/semicircle-example/sssss3f9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/semicircle-example/sssss3f9"/>
      <lastmod>2026-11-02T02:56:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/semicircle-example/sssss3f9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/semicircle-example/sssss3f9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/semicircle-example/sssss3f9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/semicircle-example/sssss3f9"/>
      <lastmod>2026-11-02T02:56:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-planes/sssss3fe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-planes/sssss3fe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-planes/sssss3fe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-planes/sssss3fe"/>
      <lastmod>2026-11-02T18:29:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-planes/sssss3fe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-planes/sssss3fe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-planes/sssss3fe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-planes/sssss3fe"/>
      <lastmod>2026-11-02T18:29:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/big-tree-branch-diagram/sssss3fv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/big-tree-branch-diagram/sssss3fv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/big-tree-branch-diagram/sssss3fv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/big-tree-branch-diagram/sssss3fv"/>
      <lastmod>2026-11-01T20:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/big-tree-branch-diagram/sssss3fv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/big-tree-branch-diagram/sssss3fv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/big-tree-branch-diagram/sssss3fv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/big-tree-branch-diagram/sssss3fv"/>
      <lastmod>2026-11-01T20:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spline-fractal-curve/sssss3f4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spline-fractal-curve/sssss3f4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spline-fractal-curve/sssss3f4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spline-fractal-curve/sssss3f4"/>
      <lastmod>2026-11-01T21:20:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spline-fractal-curve/sssss3f4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spline-fractal-curve/sssss3f4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spline-fractal-curve/sssss3f4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spline-fractal-curve/sssss3f4"/>
      <lastmod>2026-11-01T21:20:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/city-bus-problem/sssss3fl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/city-bus-problem/sssss3fl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/city-bus-problem/sssss3fl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/city-bus-problem/sssss3fl"/>
      <lastmod>2026-11-01T19:28:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/city-bus-problem/sssss3fl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/city-bus-problem/sssss3fl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/city-bus-problem/sssss3fl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/city-bus-problem/sssss3fl"/>
      <lastmod>2026-11-01T19:28:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/example-3-the-parabola/sssss3fy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-3-the-parabola/sssss3fy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-3-the-parabola/sssss3fy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-3-the-parabola/sssss3fy"/>
      <lastmod>2026-11-02T11:02:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/example-3-the-parabola/sssss3fy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-3-the-parabola/sssss3fy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-3-the-parabola/sssss3fy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-3-the-parabola/sssss3fy"/>
      <lastmod>2026-11-02T11:02:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/characteristic-property-of-hyperbola/sssss3fa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/characteristic-property-of-hyperbola/sssss3fa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/characteristic-property-of-hyperbola/sssss3fa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/characteristic-property-of-hyperbola/sssss3fa"/>
      <lastmod>2026-11-01T23:49:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/characteristic-property-of-hyperbola/sssss3fa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/characteristic-property-of-hyperbola/sssss3fa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/characteristic-property-of-hyperbola/sssss3fa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/characteristic-property-of-hyperbola/sssss3fa"/>
      <lastmod>2026-11-01T23:49:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-properties-eccentricity-tangents-and-focal-radius/sssss3fc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-properties-eccentricity-tangents-and-focal-radius/sssss3fc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-properties-eccentricity-tangents-and-focal-radius/sssss3fc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-properties-eccentricity-tangents-and-focal-radius/sssss3fc"/>
      <lastmod>2026-11-02T00:08:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-properties-eccentricity-tangents-and-focal-radius/sssss3fc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-properties-eccentricity-tangents-and-focal-radius/sssss3fc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-properties-eccentricity-tangents-and-focal-radius/sssss3fc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-properties-eccentricity-tangents-and-focal-radius/sssss3fc"/>
      <lastmod>2026-11-02T00:08:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-area-of-regular-polygons/sssss3fr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-area-of-regular-polygons/sssss3fr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-area-of-regular-polygons/sssss3fr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-area-of-regular-polygons/sssss3fr"/>
      <lastmod>2026-11-01T21:07:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-area-of-regular-polygons/sssss3fr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-area-of-regular-polygons/sssss3fr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-area-of-regular-polygons/sssss3fr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-area-of-regular-polygons/sssss3fr"/>
      <lastmod>2026-11-01T21:07:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-derivatives-interactive-exploration-of-function-and-its-derivative/sssss3fh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-derivatives-interactive-exploration-of-function-and-its-derivative/sssss3fh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-derivatives-interactive-exploration-of-function-and-its-derivative/sssss3fh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-derivatives-interactive-exploration-of-function-and-its-derivative/sssss3fh"/>
      <lastmod>2026-11-01T21:36:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-derivatives-interactive-exploration-of-function-and-its-derivative/sssss3fh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-derivatives-interactive-exploration-of-function-and-its-derivative/sssss3fh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-derivatives-interactive-exploration-of-function-and-its-derivative/sssss3fh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-derivatives-interactive-exploration-of-function-and-its-derivative/sssss3fh"/>
      <lastmod>2026-11-01T21:36:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-logarithm-calculation/sssss3ft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-logarithm-calculation/sssss3ft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-logarithm-calculation/sssss3ft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-logarithm-calculation/sssss3ft"/>
      <lastmod>2026-11-01T23:44:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-logarithm-calculation/sssss3ft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-logarithm-calculation/sssss3ft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-logarithm-calculation/sssss3ft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-logarithm-calculation/sssss3ft"/>
      <lastmod>2026-11-01T23:44:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-construction-and-transformation-demo/sssss3fx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-transformation-demo/sssss3fx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-and-transformation-demo/sssss3fx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-transformation-demo/sssss3fx"/>
      <lastmod>2026-11-02T18:11:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-construction-and-transformation-demo/sssss3fx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-transformation-demo/sssss3fx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-and-transformation-demo/sssss3fx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-transformation-demo/sssss3fx"/>
      <lastmod>2026-11-02T18:11:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-demo-by-elkane01/sssss3fi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-demo-by-elkane01/sssss3fi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-demo-by-elkane01/sssss3fi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-demo-by-elkane01/sssss3fi"/>
      <lastmod>2026-11-02T18:40:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-demo-by-elkane01/sssss3fi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-demo-by-elkane01/sssss3fi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-demo-by-elkane01/sssss3fi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-demo-by-elkane01/sssss3fi"/>
      <lastmod>2026-11-02T18:40:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-symmetric-circles-nested-inside-each-other/sssss3fo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-symmetric-circles-nested-inside-each-other/sssss3fo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-symmetric-circles-nested-inside-each-other/sssss3fo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-symmetric-circles-nested-inside-each-other/sssss3fo"/>
      <lastmod>2026-11-01T21:55:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-symmetric-circles-nested-inside-each-other/sssss3fo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-symmetric-circles-nested-inside-each-other/sssss3fo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-symmetric-circles-nested-inside-each-other/sssss3fo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-symmetric-circles-nested-inside-each-other/sssss3fo"/>
      <lastmod>2026-11-01T21:55:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-vectors-and-geometric-constructions/sssss38s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vectors-and-geometric-constructions/sssss38s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vectors-and-geometric-constructions/sssss38s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vectors-and-geometric-constructions/sssss38s"/>
      <lastmod>2026-11-01T20:44:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-vectors-and-geometric-constructions/sssss38s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vectors-and-geometric-constructions/sssss38s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vectors-and-geometric-constructions/sssss38s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vectors-and-geometric-constructions/sssss38s"/>
      <lastmod>2026-11-01T20:44:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-function-domain-and-range/sssss387</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-domain-and-range/sssss387"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-domain-and-range/sssss387"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-domain-and-range/sssss387"/>
      <lastmod>2026-11-02T00:04:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-function-domain-and-range/sssss387</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-domain-and-range/sssss387"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-domain-and-range/sssss387"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-domain-and-range/sssss387"/>
      <lastmod>2026-11-02T00:04:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/stretches-and-reflections-of-exponential-functions-interactive-practice/sssss38n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stretches-and-reflections-of-exponential-functions-interactive-practice/sssss38n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stretches-and-reflections-of-exponential-functions-interactive-practice/sssss38n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stretches-and-reflections-of-exponential-functions-interactive-practice/sssss38n"/>
      <lastmod>2026-11-02T18:26:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/stretches-and-reflections-of-exponential-functions-interactive-practice/sssss38n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stretches-and-reflections-of-exponential-functions-interactive-practice/sssss38n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stretches-and-reflections-of-exponential-functions-interactive-practice/sssss38n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stretches-and-reflections-of-exponential-functions-interactive-practice/sssss38n"/>
      <lastmod>2026-11-02T18:26:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lesson-5-exploring-the-area-of-a-circle/sssss382</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lesson-5-exploring-the-area-of-a-circle/sssss382"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lesson-5-exploring-the-area-of-a-circle/sssss382"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lesson-5-exploring-the-area-of-a-circle/sssss382"/>
      <lastmod>2026-11-02T16:54:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lesson-5-exploring-the-area-of-a-circle/sssss382</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lesson-5-exploring-the-area-of-a-circle/sssss382"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lesson-5-exploring-the-area-of-a-circle/sssss382"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lesson-5-exploring-the-area-of-a-circle/sssss382"/>
      <lastmod>2026-11-02T16:54:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-calculations-infinite-questions-for-rectangle-triangle-trapezoid-circl/sssss38k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-calculations-infinite-questions-for-rectangle-triangle-trapezoid-circl/sssss38k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-calculations-infinite-questions-for-rectangle-triangle-trapezoid-circl/sssss38k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-calculations-infinite-questions-for-rectangle-triangle-trapezoid-circl/sssss38k"/>
      <lastmod>2026-11-02T18:14:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-calculations-infinite-questions-for-rectangle-triangle-trapezoid-circl/sssss38k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-calculations-infinite-questions-for-rectangle-triangle-trapezoid-circl/sssss38k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-calculations-infinite-questions-for-rectangle-triangle-trapezoid-circl/sssss38k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-calculations-infinite-questions-for-rectangle-triangle-trapezoid-circl/sssss38k"/>
      <lastmod>2026-11-02T18:14:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-vectors-and-quadratic-equations/sssss38z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-vectors-and-quadratic-equations/sssss38z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-vectors-and-quadratic-equations/sssss38z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-vectors-and-quadratic-equations/sssss38z"/>
      <lastmod>2026-11-02T15:36:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-vectors-and-quadratic-equations/sssss38z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-vectors-and-quadratic-equations/sssss38z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-vectors-and-quadratic-equations/sssss38z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-vectors-and-quadratic-equations/sssss38z"/>
      <lastmod>2026-11-02T15:36:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometric-construction-demo/sssss380</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-construction-demo/sssss380"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-construction-demo/sssss380"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-construction-demo/sssss380"/>
      <lastmod>2026-11-02T16:48:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometric-construction-demo/sssss380</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-construction-demo/sssss380"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-construction-demo/sssss380"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-construction-demo/sssss380"/>
      <lastmod>2026-11-02T16:48:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-cone-dynamic-construction-and-unfolding/sssss38d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-cone-dynamic-construction-and-unfolding/sssss38d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-cone-dynamic-construction-and-unfolding/sssss38d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-cone-dynamic-construction-and-unfolding/sssss38d"/>
      <lastmod>2026-11-02T02:18:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-cone-dynamic-construction-and-unfolding/sssss38d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-cone-dynamic-construction-and-unfolding/sssss38d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-cone-dynamic-construction-and-unfolding/sssss38d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-cone-dynamic-construction-and-unfolding/sssss38d"/>
      <lastmod>2026-11-02T02:18:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-x-axis-3d-glasses/sssss38f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-x-axis-3d-glasses/sssss38f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-x-axis-3d-glasses/sssss38f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-x-axis-3d-glasses/sssss38f"/>
      <lastmod>2026-11-01T19:30:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-x-axis-3d-glasses/sssss38f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-x-axis-3d-glasses/sssss38f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-x-axis-3d-glasses/sssss38f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-x-axis-3d-glasses/sssss38f"/>
      <lastmod>2026-11-01T19:30:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-surface-area-calculation/sssss388</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-calculation/sssss388"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-surface-area-calculation/sssss388"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-calculation/sssss388"/>
      <lastmod>2026-11-02T00:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-surface-area-calculation/sssss388</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-calculation/sssss388"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-surface-area-calculation/sssss388"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-calculation/sssss388"/>
      <lastmod>2026-11-02T00:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-construction-and-demonstration/sssss38u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-demonstration/sssss38u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-and-demonstration/sssss38u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-demonstration/sssss38u"/>
      <lastmod>2026-11-02T17:17:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-construction-and-demonstration/sssss38u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-demonstration/sssss38u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-and-demonstration/sssss38u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-demonstration/sssss38u"/>
      <lastmod>2026-11-02T17:17:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-and-star-polygons/sssss385</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-and-star-polygons/sssss385"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-and-star-polygons/sssss385"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-and-star-polygons/sssss385"/>
      <lastmod>2026-11-02T18:33:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-and-star-polygons/sssss385</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-and-star-polygons/sssss385"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-and-star-polygons/sssss385"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-and-star-polygons/sssss385"/>
      <lastmod>2026-11-02T18:33:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-equation-solver/sssss38b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equation-solver/sssss38b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equation-solver/sssss38b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equation-solver/sssss38b"/>
      <lastmod>2026-11-02T13:14:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-equation-solver/sssss38b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equation-solver/sssss38b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equation-solver/sssss38b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equation-solver/sssss38b"/>
      <lastmod>2026-11-02T13:14:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-pattern/sssss383</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-pattern/sssss383"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-pattern/sssss383"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-pattern/sssss383"/>
      <lastmod>2026-11-02T16:58:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-pattern/sssss383</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-pattern/sssss383"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-pattern/sssss383"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-pattern/sssss383"/>
      <lastmod>2026-11-02T16:58:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-maintaining-fixed-distance-from-a-point/sssss38q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-maintaining-fixed-distance-from-a-point/sssss38q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-maintaining-fixed-distance-from-a-point/sssss38q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-maintaining-fixed-distance-from-a-point/sssss38q"/>
      <lastmod>2026-11-02T18:40:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-maintaining-fixed-distance-from-a-point/sssss38q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-maintaining-fixed-distance-from-a-point/sssss38q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-maintaining-fixed-distance-from-a-point/sssss38q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-maintaining-fixed-distance-from-a-point/sssss38q"/>
      <lastmod>2026-11-02T18:40:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-action-5-dynamic-illustration-of-two-inverse-properties-of-logar/sssss381</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-action-5-dynamic-illustration-of-two-inverse-properties-of-logar/sssss381"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-action-5-dynamic-illustration-of-two-inverse-properties-of-logar/sssss381"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-action-5-dynamic-illustration-of-two-inverse-properties-of-logar/sssss381"/>
      <lastmod>2026-11-01T21:48:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-action-5-dynamic-illustration-of-two-inverse-properties-of-logar/sssss381</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-action-5-dynamic-illustration-of-two-inverse-properties-of-logar/sssss381"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-action-5-dynamic-illustration-of-two-inverse-properties-of-logar/sssss381"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-action-5-dynamic-illustration-of-two-inverse-properties-of-logar/sssss381"/>
      <lastmod>2026-11-01T21:48:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-rotation-to-conic-sections-animation/sssss38m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-rotation-to-conic-sections-animation/sssss38m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-rotation-to-conic-sections-animation/sssss38m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-rotation-to-conic-sections-animation/sssss38m"/>
      <lastmod>2026-11-02T12:43:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-rotation-to-conic-sections-animation/sssss38m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-rotation-to-conic-sections-animation/sssss38m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-rotation-to-conic-sections-animation/sssss38m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-rotation-to-conic-sections-animation/sssss38m"/>
      <lastmod>2026-11-02T12:43:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-angled-triangles-accuracy-quiz/sssss38j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-angled-triangles-accuracy-quiz/sssss38j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-angled-triangles-accuracy-quiz/sssss38j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-angled-triangles-accuracy-quiz/sssss38j"/>
      <lastmod>2026-11-01T21:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-angled-triangles-accuracy-quiz/sssss38j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-angled-triangles-accuracy-quiz/sssss38j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-angled-triangles-accuracy-quiz/sssss38j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-angled-triangles-accuracy-quiz/sssss38j"/>
      <lastmod>2026-11-01T21:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/four-thirteenths-triangle/sssss38p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/four-thirteenths-triangle/sssss38p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/four-thirteenths-triangle/sssss38p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/four-thirteenths-triangle/sssss38p"/>
      <lastmod>2026-11-01T23:14:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/four-thirteenths-triangle/sssss38p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/four-thirteenths-triangle/sssss38p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/four-thirteenths-triangle/sssss38p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/four-thirteenths-triangle/sssss38p"/>
      <lastmod>2026-11-01T23:14:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dandelin-spheres/sssss38w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dandelin-spheres/sssss38w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dandelin-spheres/sssss38w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dandelin-spheres/sssss38w"/>
      <lastmod>2026-11-02T09:57:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dandelin-spheres/sssss38w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dandelin-spheres/sssss38w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dandelin-spheres/sssss38w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dandelin-spheres/sssss38w"/>
      <lastmod>2026-11-02T09:57:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiples-of-2-circle-sort/sssss386</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiples-of-2-circle-sort/sssss386"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiples-of-2-circle-sort/sssss386"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiples-of-2-circle-sort/sssss386"/>
      <lastmod>2026-11-01T19:13:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiples-of-2-circle-sort/sssss386</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiples-of-2-circle-sort/sssss386"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiples-of-2-circle-sort/sssss386"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiples-of-2-circle-sort/sssss386"/>
      <lastmod>2026-11-01T19:13:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-two-cylinders-steinmetz-solid-in-geogebra/sssss38g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-cylinders-steinmetz-solid-in-geogebra/sssss38g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-cylinders-steinmetz-solid-in-geogebra/sssss38g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-cylinders-steinmetz-solid-in-geogebra/sssss38g"/>
      <lastmod>2026-11-02T06:46:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-two-cylinders-steinmetz-solid-in-geogebra/sssss38g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-cylinders-steinmetz-solid-in-geogebra/sssss38g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-cylinders-steinmetz-solid-in-geogebra/sssss38g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-cylinders-steinmetz-solid-in-geogebra/sssss38g"/>
      <lastmod>2026-11-02T06:46:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/look-inside-geometric-and-calculus-integration/sssss389</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/look-inside-geometric-and-calculus-integration/sssss389"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/look-inside-geometric-and-calculus-integration/sssss389"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/look-inside-geometric-and-calculus-integration/sssss389"/>
      <lastmod>2026-11-02T02:28:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/look-inside-geometric-and-calculus-integration/sssss389</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/look-inside-geometric-and-calculus-integration/sssss389"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/look-inside-geometric-and-calculus-integration/sssss389"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/look-inside-geometric-and-calculus-integration/sssss389"/>
      <lastmod>2026-11-02T02:28:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-bridge-and-the-train-addition-for-children/sssss38e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-bridge-and-the-train-addition-for-children/sssss38e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-bridge-and-the-train-addition-for-children/sssss38e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-bridge-and-the-train-addition-for-children/sssss38e"/>
      <lastmod>2026-11-01T19:33:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-bridge-and-the-train-addition-for-children/sssss38e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-bridge-and-the-train-addition-for-children/sssss38e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-bridge-and-the-train-addition-for-children/sssss38e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-bridge-and-the-train-addition-for-children/sssss38e"/>
      <lastmod>2026-11-01T19:33:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximum-area-with-fixed-perimeter/sssss38v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-area-with-fixed-perimeter/sssss38v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-area-with-fixed-perimeter/sssss38v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-area-with-fixed-perimeter/sssss38v"/>
      <lastmod>2026-11-01T19:20:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximum-area-with-fixed-perimeter/sssss38v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-area-with-fixed-perimeter/sssss38v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-area-with-fixed-perimeter/sssss38v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-area-with-fixed-perimeter/sssss38v"/>
      <lastmod>2026-11-01T19:20:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/add-a-roof-to-the-house/sssss384</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/add-a-roof-to-the-house/sssss384"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/add-a-roof-to-the-house/sssss384"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/add-a-roof-to-the-house/sssss384"/>
      <lastmod>2026-11-01T21:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/add-a-roof-to-the-house/sssss384</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/add-a-roof-to-the-house/sssss384"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/add-a-roof-to-the-house/sssss384"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/add-a-roof-to-the-house/sssss384"/>
      <lastmod>2026-11-01T21:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-real-numbers/sssss38l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-real-numbers/sssss38l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-real-numbers/sssss38l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-real-numbers/sssss38l"/>
      <lastmod>2026-11-02T13:37:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-real-numbers/sssss38l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-real-numbers/sssss38l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-real-numbers/sssss38l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-real-numbers/sssss38l"/>
      <lastmod>2026-11-02T13:37:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-cross-section-similarity/sssss38y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-cross-section-similarity/sssss38y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-cross-section-similarity/sssss38y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-cross-section-similarity/sssss38y"/>
      <lastmod>2026-11-01T19:34:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-cross-section-similarity/sssss38y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-cross-section-similarity/sssss38y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-cross-section-similarity/sssss38y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-cross-section-similarity/sssss38y"/>
      <lastmod>2026-11-01T19:34:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/measuring-polygon-area/sssss38a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-polygon-area/sssss38a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-polygon-area/sssss38a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-polygon-area/sssss38a"/>
      <lastmod>2026-11-01T23:33:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/measuring-polygon-area/sssss38a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-polygon-area/sssss38a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-polygon-area/sssss38a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-polygon-area/sssss38a"/>
      <lastmod>2026-11-01T23:33:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-and-subtracting-signed-integers-on-a-number-line-by-elen/sssss38c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-signed-integers-on-a-number-line-by-elen/sssss38c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-and-subtracting-signed-integers-on-a-number-line-by-elen/sssss38c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-signed-integers-on-a-number-line-by-elen/sssss38c"/>
      <lastmod>2026-11-02T00:03:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-and-subtracting-signed-integers-on-a-number-line-by-elen/sssss38c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-signed-integers-on-a-number-line-by-elen/sssss38c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-and-subtracting-signed-integers-on-a-number-line-by-elen/sssss38c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-signed-integers-on-a-number-line-by-elen/sssss38c"/>
      <lastmod>2026-11-02T00:03:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-quadratics/sssss38r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-quadratics/sssss38r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-roots-of-quadratics/sssss38r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-quadratics/sssss38r"/>
      <lastmod>2026-11-02T07:35:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-complex-roots-of-quadratics/sssss38r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-quadratics/sssss38r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-roots-of-quadratics/sssss38r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-quadratics/sssss38r"/>
      <lastmod>2026-11-02T07:35:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/12-13-14-graphic-organizer-exploring-angles-area-perimeter-and-transfor/sssss38h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/12-13-14-graphic-organizer-exploring-angles-area-perimeter-and-transfor/sssss38h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/12-13-14-graphic-organizer-exploring-angles-area-perimeter-and-transfor/sssss38h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/12-13-14-graphic-organizer-exploring-angles-area-perimeter-and-transfor/sssss38h"/>
      <lastmod>2026-11-02T18:44:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/12-13-14-graphic-organizer-exploring-angles-area-perimeter-and-transfor/sssss38h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/12-13-14-graphic-organizer-exploring-angles-area-perimeter-and-transfor/sssss38h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/12-13-14-graphic-organizer-exploring-angles-area-perimeter-and-transfor/sssss38h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/12-13-14-graphic-organizer-exploring-angles-area-perimeter-and-transfor/sssss38h"/>
      <lastmod>2026-11-02T18:44:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-in-three-forms-modified-copy/sssss38t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-in-three-forms-modified-copy/sssss38t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-in-three-forms-modified-copy/sssss38t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-in-three-forms-modified-copy/sssss38t"/>
      <lastmod>2026-11-01T19:03:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-in-three-forms-modified-copy/sssss38t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-in-three-forms-modified-copy/sssss38t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-in-three-forms-modified-copy/sssss38t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-in-three-forms-modified-copy/sssss38t"/>
      <lastmod>2026-11-01T19:03:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-rectangle-for-expanding-algebraic-expressions/sssss38x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-rectangle-for-expanding-algebraic-expressions/sssss38x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-rectangle-for-expanding-algebraic-expressions/sssss38x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-rectangle-for-expanding-algebraic-expressions/sssss38x"/>
      <lastmod>2026-11-01T23:39:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-rectangle-for-expanding-algebraic-expressions/sssss38x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-rectangle-for-expanding-algebraic-expressions/sssss38x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-rectangle-for-expanding-algebraic-expressions/sssss38x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-rectangle-for-expanding-algebraic-expressions/sssss38x"/>
      <lastmod>2026-11-01T23:39:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-of-functions-by-ben-sparks/sssss38i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-functions-by-ben-sparks/sssss38i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-functions-by-ben-sparks/sssss38i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-functions-by-ben-sparks/sssss38i"/>
      <lastmod>2026-11-02T16:51:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-of-functions-by-ben-sparks/sssss38i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-functions-by-ben-sparks/sssss38i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-functions-by-ben-sparks/sssss38i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-functions-by-ben-sparks/sssss38i"/>
      <lastmod>2026-11-02T16:51:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-sqrt-x/sssss38o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sqrt-x/sssss38o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sqrt-x/sssss38o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sqrt-x/sssss38o"/>
      <lastmod>2026-11-02T00:04:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-sqrt-x/sssss38o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sqrt-x/sssss38o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sqrt-x/sssss38o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sqrt-x/sssss38o"/>
      <lastmod>2026-11-02T00:04:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-model-demonstration/sssss3us</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-model-demonstration/sssss3us"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-model-demonstration/sssss3us"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-model-demonstration/sssss3us"/>
      <lastmod>2026-11-01T19:26:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-model-demonstration/sssss3us</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-model-demonstration/sssss3us"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-model-demonstration/sssss3us"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-model-demonstration/sssss3us"/>
      <lastmod>2026-11-01T19:26:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-cone-exploration/sssss3u7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-cone-exploration/sssss3u7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-cone-exploration/sssss3u7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-cone-exploration/sssss3u7"/>
      <lastmod>2026-11-01T22:06:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-cone-exploration/sssss3u7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-cone-exploration/sssss3u7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-cone-exploration/sssss3u7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-cone-exploration/sssss3u7"/>
      <lastmod>2026-11-01T22:06:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-equations-by-tessa-whitmoyer/sssss3un</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-equations-by-tessa-whitmoyer/sssss3un"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-equations-by-tessa-whitmoyer/sssss3un"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-equations-by-tessa-whitmoyer/sssss3un"/>
      <lastmod>2026-11-02T16:28:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-equations-by-tessa-whitmoyer/sssss3un</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-equations-by-tessa-whitmoyer/sssss3un"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-equations-by-tessa-whitmoyer/sssss3un"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-equations-by-tessa-whitmoyer/sssss3un"/>
      <lastmod>2026-11-02T16:28:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-loop-or-not/sssss3u2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-loop-or-not/sssss3u2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-loop-or-not/sssss3u2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-loop-or-not/sssss3u2"/>
      <lastmod>2026-11-01T21:36:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-loop-or-not/sssss3u2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-loop-or-not/sssss3u2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-loop-or-not/sssss3u2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-loop-or-not/sssss3u2"/>
      <lastmod>2026-11-01T21:36:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-of-x-4-1-x-2/sssss3uk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-x-4-1-x-2/sssss3uk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-x-4-1-x-2/sssss3uk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-x-4-1-x-2/sssss3uk"/>
      <lastmod>2026-11-02T17:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-of-x-4-1-x-2/sssss3uk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-x-4-1-x-2/sssss3uk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-x-4-1-x-2/sssss3uk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-x-4-1-x-2/sssss3uk"/>
      <lastmod>2026-11-02T17:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-tessellation/sssss3uz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-tessellation/sssss3uz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-tessellation/sssss3uz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-tessellation/sssss3uz"/>
      <lastmod>2026-11-01T21:17:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-tessellation/sssss3uz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-tessellation/sssss3uz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-tessellation/sssss3uz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-tessellation/sssss3uz"/>
      <lastmod>2026-11-01T21:17:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roots-of-related-cubics-k-k-k/sssss3u0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-related-cubics-k-k-k/sssss3u0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-related-cubics-k-k-k/sssss3u0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-related-cubics-k-k-k/sssss3u0"/>
      <lastmod>2026-11-02T02:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roots-of-related-cubics-k-k-k/sssss3u0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-related-cubics-k-k-k/sssss3u0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-related-cubics-k-k-k/sssss3u0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-related-cubics-k-k-k/sssss3u0"/>
      <lastmod>2026-11-02T02:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-and-interior-of-an-angle/sssss3ud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-and-interior-of-an-angle/sssss3ud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-and-interior-of-an-angle/sssss3ud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-and-interior-of-an-angle/sssss3ud"/>
      <lastmod>2026-11-02T18:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-and-interior-of-an-angle/sssss3ud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-and-interior-of-an-angle/sssss3ud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-and-interior-of-an-angle/sssss3ud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-and-interior-of-an-angle/sssss3ud"/>
      <lastmod>2026-11-02T18:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-demo-by-tom-harding/sssss3uf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-tom-harding/sssss3uf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demo-by-tom-harding/sssss3uf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-tom-harding/sssss3uf"/>
      <lastmod>2026-11-01T23:45:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-demo-by-tom-harding/sssss3uf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-tom-harding/sssss3uf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demo-by-tom-harding/sssss3uf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-tom-harding/sssss3uf"/>
      <lastmod>2026-11-01T23:45:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/do-you-know-the-names-of-these-solids/sssss3u8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/do-you-know-the-names-of-these-solids/sssss3u8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/do-you-know-the-names-of-these-solids/sssss3u8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/do-you-know-the-names-of-these-solids/sssss3u8"/>
      <lastmod>2026-11-02T15:19:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/do-you-know-the-names-of-these-solids/sssss3u8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/do-you-know-the-names-of-these-solids/sssss3u8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/do-you-know-the-names-of-these-solids/sssss3u8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/do-you-know-the-names-of-these-solids/sssss3u8"/>
      <lastmod>2026-11-02T15:19:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-square-root-function-ns1-05-xt1/sssss3uu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-square-root-function-ns1-05-xt1/sssss3uu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-square-root-function-ns1-05-xt1/sssss3uu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-square-root-function-ns1-05-xt1/sssss3uu"/>
      <lastmod>2026-11-02T00:26:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-square-root-function-ns1-05-xt1/sssss3uu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-square-root-function-ns1-05-xt1/sssss3uu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-square-root-function-ns1-05-xt1/sssss3uu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-square-root-function-ns1-05-xt1/sssss3uu"/>
      <lastmod>2026-11-02T00:26:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-and-point/sssss3u5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-point/sssss3u5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-point/sssss3u5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-point/sssss3u5"/>
      <lastmod>2026-11-02T17:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-and-point/sssss3u5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-point/sssss3u5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-point/sssss3u5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-point/sssss3u5"/>
      <lastmod>2026-11-02T17:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-a-system-with-substitution/sssss3ub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-a-system-with-substitution/sssss3ub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-a-system-with-substitution/sssss3ub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-a-system-with-substitution/sssss3ub"/>
      <lastmod>2026-11-02T10:49:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-a-system-with-substitution/sssss3ub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-a-system-with-substitution/sssss3ub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-a-system-with-substitution/sssss3ub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-a-system-with-substitution/sssss3ub"/>
      <lastmod>2026-11-02T10:49:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-parabolas/sssss3u3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-parabolas/sssss3u3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-parabolas/sssss3u3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-parabolas/sssss3u3"/>
      <lastmod>2026-11-02T14:58:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-parabolas/sssss3u3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-parabolas/sssss3u3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-parabolas/sssss3u3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-parabolas/sssss3u3"/>
      <lastmod>2026-11-02T14:58:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/beats-logo-composite-construction-with-vectors-and-geometric-transformations/sssss3uq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/beats-logo-composite-construction-with-vectors-and-geometric-transformations/sssss3uq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/beats-logo-composite-construction-with-vectors-and-geometric-transformations/sssss3uq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/beats-logo-composite-construction-with-vectors-and-geometric-transformations/sssss3uq"/>
      <lastmod>2026-11-01T22:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/beats-logo-composite-construction-with-vectors-and-geometric-transformations/sssss3uq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/beats-logo-composite-construction-with-vectors-and-geometric-transformations/sssss3uq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/beats-logo-composite-construction-with-vectors-and-geometric-transformations/sssss3uq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/beats-logo-composite-construction-with-vectors-and-geometric-transformations/sssss3uq"/>
      <lastmod>2026-11-01T22:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-sines-ambiguous-case-by-amanda-huelbig/sssss3u1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-sines-ambiguous-case-by-amanda-huelbig/sssss3u1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-sines-ambiguous-case-by-amanda-huelbig/sssss3u1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-sines-ambiguous-case-by-amanda-huelbig/sssss3u1"/>
      <lastmod>2026-11-02T02:53:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-sines-ambiguous-case-by-amanda-huelbig/sssss3u1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-sines-ambiguous-case-by-amanda-huelbig/sssss3u1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-sines-ambiguous-case-by-amanda-huelbig/sssss3u1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-sines-ambiguous-case-by-amanda-huelbig/sssss3u1"/>
      <lastmod>2026-11-02T02:53:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a1-ace-2-equation-of-a-line-interactive-slope-exploration/sssss3um</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a1-ace-2-equation-of-a-line-interactive-slope-exploration/sssss3um"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a1-ace-2-equation-of-a-line-interactive-slope-exploration/sssss3um"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a1-ace-2-equation-of-a-line-interactive-slope-exploration/sssss3um"/>
      <lastmod>2026-11-01T21:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a1-ace-2-equation-of-a-line-interactive-slope-exploration/sssss3um</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a1-ace-2-equation-of-a-line-interactive-slope-exploration/sssss3um"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a1-ace-2-equation-of-a-line-interactive-slope-exploration/sssss3um"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a1-ace-2-equation-of-a-line-interactive-slope-exploration/sssss3um"/>
      <lastmod>2026-11-01T21:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-jeanne-kelly/sssss3uj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-jeanne-kelly/sssss3uj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-jeanne-kelly/sssss3uj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-jeanne-kelly/sssss3uj"/>
      <lastmod>2026-11-01T23:11:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-jeanne-kelly/sssss3uj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-jeanne-kelly/sssss3uj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-jeanne-kelly/sssss3uj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-jeanne-kelly/sssss3uj"/>
      <lastmod>2026-11-01T23:11:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-transformation-and-polygon-demo/sssss3up</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-transformation-and-polygon-demo/sssss3up"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-transformation-and-polygon-demo/sssss3up"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-transformation-and-polygon-demo/sssss3up"/>
      <lastmod>2026-11-01T21:55:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-transformation-and-polygon-demo/sssss3up</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-transformation-and-polygon-demo/sssss3up"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-transformation-and-polygon-demo/sssss3up"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-transformation-and-polygon-demo/sssss3up"/>
      <lastmod>2026-11-01T21:55:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-functions-vertex-form/sssss3uw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-vertex-form/sssss3uw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-vertex-form/sssss3uw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-vertex-form/sssss3uw"/>
      <lastmod>2026-11-02T00:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-functions-vertex-form/sssss3uw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-vertex-form/sssss3uw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-vertex-form/sssss3uw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-vertex-form/sssss3uw"/>
      <lastmod>2026-11-02T00:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/step-by-step-gaussian-elimination-javascript-interactive/sssss3u6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/step-by-step-gaussian-elimination-javascript-interactive/sssss3u6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/step-by-step-gaussian-elimination-javascript-interactive/sssss3u6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/step-by-step-gaussian-elimination-javascript-interactive/sssss3u6"/>
      <lastmod>2026-11-02T16:44:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/step-by-step-gaussian-elimination-javascript-interactive/sssss3u6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/step-by-step-gaussian-elimination-javascript-interactive/sssss3u6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/step-by-step-gaussian-elimination-javascript-interactive/sssss3u6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/step-by-step-gaussian-elimination-javascript-interactive/sssss3u6"/>
      <lastmod>2026-11-02T16:44:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter-by-spkwan/sssss3ug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter-by-spkwan/sssss3ug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rugby-shape-and-its-perimeter-by-spkwan/sssss3ug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter-by-spkwan/sssss3ug"/>
      <lastmod>2026-11-01T23:24:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rugby-shape-and-its-perimeter-by-spkwan/sssss3ug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter-by-spkwan/sssss3ug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rugby-shape-and-its-perimeter-by-spkwan/sssss3ug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter-by-spkwan/sssss3ug"/>
      <lastmod>2026-11-01T23:24:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-3-geometric-construction/sssss3u9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-3-geometric-construction/sssss3u9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-3-geometric-construction/sssss3u9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-3-geometric-construction/sssss3u9"/>
      <lastmod>2026-11-01T23:57:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-3-geometric-construction/sssss3u9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-3-geometric-construction/sssss3u9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-3-geometric-construction/sssss3u9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-3-geometric-construction/sssss3u9"/>
      <lastmod>2026-11-01T23:57:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-sequence-general-term-demo/sssss3ue</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-general-term-demo/sssss3ue"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-general-term-demo/sssss3ue"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-general-term-demo/sssss3ue"/>
      <lastmod>2026-11-01T19:13:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-sequence-general-term-demo/sssss3ue</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-general-term-demo/sssss3ue"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-general-term-demo/sssss3ue"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-general-term-demo/sssss3ue"/>
      <lastmod>2026-11-01T19:13:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-geometric-line-patterns/sssss3uv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-line-patterns/sssss3uv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-line-patterns/sssss3uv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-line-patterns/sssss3uv"/>
      <lastmod>2026-11-01T19:30:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-geometric-line-patterns/sssss3uv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-line-patterns/sssss3uv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-line-patterns/sssss3uv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-line-patterns/sssss3uv"/>
      <lastmod>2026-11-01T19:30:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-progression-demo/sssss3u4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-progression-demo/sssss3u4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-progression-demo/sssss3u4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-progression-demo/sssss3u4"/>
      <lastmod>2026-11-02T18:18:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-progression-demo/sssss3u4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-progression-demo/sssss3u4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-progression-demo/sssss3u4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-progression-demo/sssss3u4"/>
      <lastmod>2026-11-02T18:18:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-dimensions/sssss3ul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-dimensions/sssss3ul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-dimensions/sssss3ul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-dimensions/sssss3ul"/>
      <lastmod>2026-11-02T13:01:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-dimensions/sssss3ul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-dimensions/sssss3ul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-dimensions/sssss3ul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-dimensions/sssss3ul"/>
      <lastmod>2026-11-02T13:01:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wineglass-volume-calculation-example/sssss3uy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wineglass-volume-calculation-example/sssss3uy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wineglass-volume-calculation-example/sssss3uy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wineglass-volume-calculation-example/sssss3uy"/>
      <lastmod>2026-11-02T17:04:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wineglass-volume-calculation-example/sssss3uy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wineglass-volume-calculation-example/sssss3uy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wineglass-volume-calculation-example/sssss3uy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wineglass-volume-calculation-example/sssss3uy"/>
      <lastmod>2026-11-02T17:04:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-net-demonstration-by-math-team-energytech/sssss3ua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net-demonstration-by-math-team-energytech/sssss3ua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net-demonstration-by-math-team-energytech/sssss3ua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net-demonstration-by-math-team-energytech/sssss3ua"/>
      <lastmod>2026-11-02T00:56:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-net-demonstration-by-math-team-energytech/sssss3ua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net-demonstration-by-math-team-energytech/sssss3ua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net-demonstration-by-math-team-energytech/sssss3ua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net-demonstration-by-math-team-energytech/sssss3ua"/>
      <lastmod>2026-11-02T00:56:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/astroid-geometric-construction-and-perimeter-exploration/sssss3uc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/astroid-geometric-construction-and-perimeter-exploration/sssss3uc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/astroid-geometric-construction-and-perimeter-exploration/sssss3uc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/astroid-geometric-construction-and-perimeter-exploration/sssss3uc"/>
      <lastmod>2026-11-02T18:32:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/astroid-geometric-construction-and-perimeter-exploration/sssss3uc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/astroid-geometric-construction-and-perimeter-exploration/sssss3uc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/astroid-geometric-construction-and-perimeter-exploration/sssss3uc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/astroid-geometric-construction-and-perimeter-exploration/sssss3uc"/>
      <lastmod>2026-11-02T18:32:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-on-a-number-line/sssss3ur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-on-a-number-line/sssss3ur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-and-subtraction-on-a-number-line/sssss3ur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-on-a-number-line/sssss3ur"/>
      <lastmod>2026-11-01T19:02:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-addition-and-subtraction-on-a-number-line/sssss3ur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-on-a-number-line/sssss3ur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-and-subtraction-on-a-number-line/sssss3ur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-on-a-number-line/sssss3ur"/>
      <lastmod>2026-11-01T19:02:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/projectile-motion-parametric-equations/sssss3uh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-parametric-equations/sssss3uh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-parametric-equations/sssss3uh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-parametric-equations/sssss3uh"/>
      <lastmod>2026-11-02T07:08:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/projectile-motion-parametric-equations/sssss3uh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-parametric-equations/sssss3uh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-parametric-equations/sssss3uh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-parametric-equations/sssss3uh"/>
      <lastmod>2026-11-02T07:08:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-demo-by-gareth-dudding/sssss3ut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-by-gareth-dudding/sssss3ut"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-demo-by-gareth-dudding/sssss3ut"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-by-gareth-dudding/sssss3ut"/>
      <lastmod>2026-11-02T09:42:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-demo-by-gareth-dudding/sssss3ut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-by-gareth-dudding/sssss3ut"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-demo-by-gareth-dudding/sssss3ut"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-by-gareth-dudding/sssss3ut"/>
      <lastmod>2026-11-02T09:42:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-adding-and-subtracting-decimals/sssss3ux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-adding-and-subtracting-decimals/sssss3ux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-adding-and-subtracting-decimals/sssss3ux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-adding-and-subtracting-decimals/sssss3ux"/>
      <lastmod>2026-11-02T10:38:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-adding-and-subtracting-decimals/sssss3ux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-adding-and-subtracting-decimals/sssss3ux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-adding-and-subtracting-decimals/sssss3ux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-adding-and-subtracting-decimals/sssss3ux"/>
      <lastmod>2026-11-02T10:38:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphs-of-proportional-relationships-im-8-3-2-lesson/sssss3ui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-proportional-relationships-im-8-3-2-lesson/sssss3ui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-proportional-relationships-im-8-3-2-lesson/sssss3ui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-proportional-relationships-im-8-3-2-lesson/sssss3ui"/>
      <lastmod>2026-11-01T20:26:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphs-of-proportional-relationships-im-8-3-2-lesson/sssss3ui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-proportional-relationships-im-8-3-2-lesson/sssss3ui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-proportional-relationships-im-8-3-2-lesson/sssss3ui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-proportional-relationships-im-8-3-2-lesson/sssss3ui"/>
      <lastmod>2026-11-01T20:26:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fitting-a-parabola/sssss3uo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fitting-a-parabola/sssss3uo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fitting-a-parabola/sssss3uo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fitting-a-parabola/sssss3uo"/>
      <lastmod>2026-11-01T23:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fitting-a-parabola/sssss3uo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fitting-a-parabola/sssss3uo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fitting-a-parabola/sssss3uo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fitting-a-parabola/sssss3uo"/>
      <lastmod>2026-11-01T23:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-fractions-by-pedro-arlindo/sssss35s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-pedro-arlindo/sssss35s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-by-pedro-arlindo/sssss35s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-pedro-arlindo/sssss35s"/>
      <lastmod>2026-11-01T21:56:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-fractions-by-pedro-arlindo/sssss35s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-pedro-arlindo/sssss35s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-by-pedro-arlindo/sssss35s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-pedro-arlindo/sssss35s"/>
      <lastmod>2026-11-01T21:56:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-table-quiz-11-15/sssss357</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-table-quiz-11-15/sssss357"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-table-quiz-11-15/sssss357"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-table-quiz-11-15/sssss357"/>
      <lastmod>2026-11-02T18:48:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-table-quiz-11-15/sssss357</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-table-quiz-11-15/sssss357"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-table-quiz-11-15/sssss357"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-table-quiz-11-15/sssss357"/>
      <lastmod>2026-11-02T18:48:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-the-lcm-of-a-b-c/sssss35n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-lcm-of-a-b-c/sssss35n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-lcm-of-a-b-c/sssss35n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-lcm-of-a-b-c/sssss35n"/>
      <lastmod>2026-11-02T16:45:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-the-lcm-of-a-b-c/sssss35n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-lcm-of-a-b-c/sssss35n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-lcm-of-a-b-c/sssss35n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-lcm-of-a-b-c/sssss35n"/>
      <lastmod>2026-11-02T16:45:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dome-structure-model/sssss352</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dome-structure-model/sssss352"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dome-structure-model/sssss352"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dome-structure-model/sssss352"/>
      <lastmod>2026-11-01T23:09:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dome-structure-model/sssss352</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dome-structure-model/sssss352"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dome-structure-model/sssss352"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dome-structure-model/sssss352"/>
      <lastmod>2026-11-01T23:09:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruence-and-transformations/sssss35k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-and-transformations/sssss35k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-and-transformations/sssss35k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-and-transformations/sssss35k"/>
      <lastmod>2026-11-01T23:49:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruence-and-transformations/sssss35k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-and-transformations/sssss35k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-and-transformations/sssss35k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-and-transformations/sssss35k"/>
      <lastmod>2026-11-01T23:49:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pascal-s-triangle-hockey-stick-pattern-demo/sssss35z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pascal-s-triangle-hockey-stick-pattern-demo/sssss35z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pascal-s-triangle-hockey-stick-pattern-demo/sssss35z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pascal-s-triangle-hockey-stick-pattern-demo/sssss35z"/>
      <lastmod>2026-11-02T02:46:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pascal-s-triangle-hockey-stick-pattern-demo/sssss35z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pascal-s-triangle-hockey-stick-pattern-demo/sssss35z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pascal-s-triangle-hockey-stick-pattern-demo/sssss35z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pascal-s-triangle-hockey-stick-pattern-demo/sssss35z"/>
      <lastmod>2026-11-02T02:46:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interior-intersections-demo/sssss350</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-intersections-demo/sssss350"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-intersections-demo/sssss350"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-intersections-demo/sssss350"/>
      <lastmod>2026-11-02T11:45:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interior-intersections-demo/sssss350</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-intersections-demo/sssss350"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-intersections-demo/sssss350"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-intersections-demo/sssss350"/>
      <lastmod>2026-11-02T11:45:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/between-ness-in-addition-subtraction-demo/sssss35d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/between-ness-in-addition-subtraction-demo/sssss35d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/between-ness-in-addition-subtraction-demo/sssss35d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/between-ness-in-addition-subtraction-demo/sssss35d"/>
      <lastmod>2026-11-02T17:03:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/between-ness-in-addition-subtraction-demo/sssss35d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/between-ness-in-addition-subtraction-demo/sssss35d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/between-ness-in-addition-subtraction-demo/sssss35d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/between-ness-in-addition-subtraction-demo/sssss35d"/>
      <lastmod>2026-11-02T17:03:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-line-using-integers-a-mathematical-demonstration/sssss35f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-using-integers-a-mathematical-demonstration/sssss35f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-using-integers-a-mathematical-demonstration/sssss35f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-using-integers-a-mathematical-demonstration/sssss35f"/>
      <lastmod>2026-11-02T00:40:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-line-using-integers-a-mathematical-demonstration/sssss35f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-using-integers-a-mathematical-demonstration/sssss35f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-using-integers-a-mathematical-demonstration/sssss35f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-using-integers-a-mathematical-demonstration/sssss35f"/>
      <lastmod>2026-11-02T00:40:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wage-problem/sssss358</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wage-problem/sssss358"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wage-problem/sssss358"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wage-problem/sssss358"/>
      <lastmod>2026-11-02T11:53:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wage-problem/sssss358</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wage-problem/sssss358"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wage-problem/sssss358"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wage-problem/sssss358"/>
      <lastmod>2026-11-02T11:53:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-graph-transformations-in-degrees/sssss35u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-graph-transformations-in-degrees/sssss35u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-graph-transformations-in-degrees/sssss35u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-graph-transformations-in-degrees/sssss35u"/>
      <lastmod>2026-11-01T23:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-graph-transformations-in-degrees/sssss35u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-graph-transformations-in-degrees/sssss35u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-graph-transformations-in-degrees/sssss35u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-graph-transformations-in-degrees/sssss35u"/>
      <lastmod>2026-11-01T23:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-graphs-of-quadratic-functions/sssss355</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-graphs-of-quadratic-functions/sssss355"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-graphs-of-quadratic-functions/sssss355"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-graphs-of-quadratic-functions/sssss355"/>
      <lastmod>2026-11-02T18:23:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-graphs-of-quadratic-functions/sssss355</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-graphs-of-quadratic-functions/sssss355"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-graphs-of-quadratic-functions/sssss355"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-graphs-of-quadratic-functions/sssss355"/>
      <lastmod>2026-11-02T18:23:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tree-growth-iteration/sssss35b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tree-growth-iteration/sssss35b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tree-growth-iteration/sssss35b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tree-growth-iteration/sssss35b"/>
      <lastmod>2026-11-01T19:25:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tree-growth-iteration/sssss35b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tree-growth-iteration/sssss35b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tree-growth-iteration/sssss35b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tree-growth-iteration/sssss35b"/>
      <lastmod>2026-11-01T19:25:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-abcd-dilation/sssss353</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-abcd-dilation/sssss353"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-abcd-dilation/sssss353"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-abcd-dilation/sssss353"/>
      <lastmod>2026-11-02T17:52:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-abcd-dilation/sssss353</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-abcd-dilation/sssss353"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-abcd-dilation/sssss353"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-abcd-dilation/sssss353"/>
      <lastmod>2026-11-02T17:52:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/homotopy-with-surfaces/sssss35q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/homotopy-with-surfaces/sssss35q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/homotopy-with-surfaces/sssss35q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/homotopy-with-surfaces/sssss35q"/>
      <lastmod>2026-11-02T18:03:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/homotopy-with-surfaces/sssss35q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/homotopy-with-surfaces/sssss35q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/homotopy-with-surfaces/sssss35q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/homotopy-with-surfaces/sssss35q"/>
      <lastmod>2026-11-02T18:03:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-and-oblique-cone/sssss351</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-and-oblique-cone/sssss351"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-and-oblique-cone/sssss351"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-and-oblique-cone/sssss351"/>
      <lastmod>2026-11-02T18:08:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-and-oblique-cone/sssss351</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-and-oblique-cone/sssss351"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-and-oblique-cone/sssss351"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-and-oblique-cone/sssss351"/>
      <lastmod>2026-11-02T18:08:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tubes-around-polynomial-regressions/sssss35m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tubes-around-polynomial-regressions/sssss35m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tubes-around-polynomial-regressions/sssss35m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tubes-around-polynomial-regressions/sssss35m"/>
      <lastmod>2026-11-01T19:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tubes-around-polynomial-regressions/sssss35m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tubes-around-polynomial-regressions/sssss35m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tubes-around-polynomial-regressions/sssss35m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tubes-around-polynomial-regressions/sssss35m"/>
      <lastmod>2026-11-01T19:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-scalene-triangles/sssss35j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-scalene-triangles/sssss35j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-scalene-triangles/sssss35j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-scalene-triangles/sssss35j"/>
      <lastmod>2026-11-02T18:20:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-scalene-triangles/sssss35j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-scalene-triangles/sssss35j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-scalene-triangles/sssss35j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-scalene-triangles/sssss35j"/>
      <lastmod>2026-11-02T18:20:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-graphing-ellipses-eq-in-standard-form/sssss35p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-graphing-ellipses-eq-in-standard-form/sssss35p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-graphing-ellipses-eq-in-standard-form/sssss35p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-graphing-ellipses-eq-in-standard-form/sssss35p"/>
      <lastmod>2026-11-01T21:31:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-graphing-ellipses-eq-in-standard-form/sssss35p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-graphing-ellipses-eq-in-standard-form/sssss35p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-graphing-ellipses-eq-in-standard-form/sssss35p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-graphing-ellipses-eq-in-standard-form/sssss35p"/>
      <lastmod>2026-11-01T21:31:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3-d-pyramids/sssss35w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3-d-pyramids/sssss35w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3-d-pyramids/sssss35w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3-d-pyramids/sssss35w"/>
      <lastmod>2026-11-02T08:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3-d-pyramids/sssss35w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3-d-pyramids/sssss35w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3-d-pyramids/sssss35w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3-d-pyramids/sssss35w"/>
      <lastmod>2026-11-02T08:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-lines-of-symmetry-geometric-construction-and-mirror-transformation/sssss356</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-lines-of-symmetry-geometric-construction-and-mirror-transformation/sssss356"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-lines-of-symmetry-geometric-construction-and-mirror-transformation/sssss356"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-lines-of-symmetry-geometric-construction-and-mirror-transformation/sssss356"/>
      <lastmod>2026-11-02T00:18:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-lines-of-symmetry-geometric-construction-and-mirror-transformation/sssss356</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-lines-of-symmetry-geometric-construction-and-mirror-transformation/sssss356"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-lines-of-symmetry-geometric-construction-and-mirror-transformation/sssss356"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-lines-of-symmetry-geometric-construction-and-mirror-transformation/sssss356"/>
      <lastmod>2026-11-02T00:18:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-ellipsoid-and-parabolic-cylinder/sssss35g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-ellipsoid-and-parabolic-cylinder/sssss35g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-ellipsoid-and-parabolic-cylinder/sssss35g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-ellipsoid-and-parabolic-cylinder/sssss35g"/>
      <lastmod>2026-11-01T19:25:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-ellipsoid-and-parabolic-cylinder/sssss35g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-ellipsoid-and-parabolic-cylinder/sssss35g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-ellipsoid-and-parabolic-cylinder/sssss35g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-ellipsoid-and-parabolic-cylinder/sssss35g"/>
      <lastmod>2026-11-01T19:25:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/energy-diagrams-7/sssss359</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-diagrams-7/sssss359"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-diagrams-7/sssss359"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-diagrams-7/sssss359"/>
      <lastmod>2026-11-02T10:42:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/energy-diagrams-7/sssss359</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-diagrams-7/sssss359"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-diagrams-7/sssss359"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-diagrams-7/sssss359"/>
      <lastmod>2026-11-02T10:42:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-regression-and-statistical-graphs/sssss35e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-and-statistical-graphs/sssss35e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-and-statistical-graphs/sssss35e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-and-statistical-graphs/sssss35e"/>
      <lastmod>2026-11-02T17:52:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-regression-and-statistical-graphs/sssss35e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-and-statistical-graphs/sssss35e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-and-statistical-graphs/sssss35e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-and-statistical-graphs/sssss35e"/>
      <lastmod>2026-11-02T17:52:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cone-by-israel-castro-jr/sssss35v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cone-by-israel-castro-jr/sssss35v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-sphere-and-cone-by-israel-castro-jr/sssss35v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cone-by-israel-castro-jr/sssss35v"/>
      <lastmod>2026-11-02T13:27:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-sphere-and-cone-by-israel-castro-jr/sssss35v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cone-by-israel-castro-jr/sssss35v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-sphere-and-cone-by-israel-castro-jr/sssss35v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cone-by-israel-castro-jr/sssss35v"/>
      <lastmod>2026-11-02T13:27:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-by-j-lacoste/sssss354</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-by-j-lacoste/sssss354"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-by-j-lacoste/sssss354"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-by-j-lacoste/sssss354"/>
      <lastmod>2026-11-02T18:20:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-by-j-lacoste/sssss354</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-by-j-lacoste/sssss354"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-by-j-lacoste/sssss354"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-by-j-lacoste/sssss354"/>
      <lastmod>2026-11-02T18:20:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/working-with-sequences/sssss35l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/working-with-sequences/sssss35l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/working-with-sequences/sssss35l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/working-with-sequences/sssss35l"/>
      <lastmod>2026-11-01T22:01:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/working-with-sequences/sssss35l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/working-with-sequences/sssss35l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/working-with-sequences/sssss35l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/working-with-sequences/sssss35l"/>
      <lastmod>2026-11-01T22:01:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-parabolas-by-changing-x-coefficient-and-constant/sssss35y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-parabolas-by-changing-x-coefficient-and-constant/sssss35y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-parabolas-by-changing-x-coefficient-and-constant/sssss35y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-parabolas-by-changing-x-coefficient-and-constant/sssss35y"/>
      <lastmod>2026-11-02T17:48:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-parabolas-by-changing-x-coefficient-and-constant/sssss35y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-parabolas-by-changing-x-coefficient-and-constant/sssss35y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-parabolas-by-changing-x-coefficient-and-constant/sssss35y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-parabolas-by-changing-x-coefficient-and-constant/sssss35y"/>
      <lastmod>2026-11-02T17:48:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagons-and-related-geometric-constructions/sssss35a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagons-and-related-geometric-constructions/sssss35a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagons-and-related-geometric-constructions/sssss35a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagons-and-related-geometric-constructions/sssss35a"/>
      <lastmod>2026-11-02T06:11:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagons-and-related-geometric-constructions/sssss35a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagons-and-related-geometric-constructions/sssss35a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagons-and-related-geometric-constructions/sssss35a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagons-and-related-geometric-constructions/sssss35a"/>
      <lastmod>2026-11-02T06:11:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-with-vectors/sssss35c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-with-vectors/sssss35c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-with-vectors/sssss35c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-with-vectors/sssss35c"/>
      <lastmod>2026-11-02T16:57:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-with-vectors/sssss35c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-with-vectors/sssss35c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-with-vectors/sssss35c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-with-vectors/sssss35c"/>
      <lastmod>2026-11-02T16:57:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tiled-sphere/sssss35r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tiled-sphere/sssss35r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tiled-sphere/sssss35r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tiled-sphere/sssss35r"/>
      <lastmod>2026-11-01T19:19:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tiled-sphere/sssss35r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tiled-sphere/sssss35r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tiled-sphere/sssss35r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tiled-sphere/sssss35r"/>
      <lastmod>2026-11-01T19:19:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cobweb-diagram-example/sssss35h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cobweb-diagram-example/sssss35h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cobweb-diagram-example/sssss35h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cobweb-diagram-example/sssss35h"/>
      <lastmod>2026-11-02T13:49:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cobweb-diagram-example/sssss35h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cobweb-diagram-example/sssss35h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cobweb-diagram-example/sssss35h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cobweb-diagram-example/sssss35h"/>
      <lastmod>2026-11-02T13:49:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-volumes-of-revolution/sssss35t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volumes-of-revolution/sssss35t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volumes-of-revolution/sssss35t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volumes-of-revolution/sssss35t"/>
      <lastmod>2026-11-01T21:26:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-volumes-of-revolution/sssss35t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volumes-of-revolution/sssss35t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volumes-of-revolution/sssss35t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volumes-of-revolution/sssss35t"/>
      <lastmod>2026-11-01T21:26:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-game-exploring-polygon-mirror-transformations/sssss35x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-game-exploring-polygon-mirror-transformations/sssss35x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-game-exploring-polygon-mirror-transformations/sssss35x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-game-exploring-polygon-mirror-transformations/sssss35x"/>
      <lastmod>2026-11-02T12:58:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-game-exploring-polygon-mirror-transformations/sssss35x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-game-exploring-polygon-mirror-transformations/sssss35x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-game-exploring-polygon-mirror-transformations/sssss35x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-game-exploring-polygon-mirror-transformations/sssss35x"/>
      <lastmod>2026-11-02T12:58:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-a-fish-shape-with-points/sssss35i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-a-fish-shape-with-points/sssss35i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-a-fish-shape-with-points/sssss35i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-a-fish-shape-with-points/sssss35i"/>
      <lastmod>2026-11-02T16:39:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-a-fish-shape-with-points/sssss35i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-a-fish-shape-with-points/sssss35i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-a-fish-shape-with-points/sssss35i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-a-fish-shape-with-points/sssss35i"/>
      <lastmod>2026-11-02T16:39:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-with-trigonometric-and-logarithmic-functions-isabelle-gara/sssss35o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-with-trigonometric-and-logarithmic-functions-isabelle-gara/sssss35o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-with-trigonometric-and-logarithmic-functions-isabelle-gara/sssss35o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-with-trigonometric-and-logarithmic-functions-isabelle-gara/sssss35o"/>
      <lastmod>2026-11-02T00:13:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-with-trigonometric-and-logarithmic-functions-isabelle-gara/sssss35o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-with-trigonometric-and-logarithmic-functions-isabelle-gara/sssss35o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-with-trigonometric-and-logarithmic-functions-isabelle-gara/sssss35o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-with-trigonometric-and-logarithmic-functions-isabelle-gara/sssss35o"/>
      <lastmod>2026-11-02T00:13:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complementary-angles-demonstration/sssss3bs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complementary-angles-demonstration/sssss3bs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complementary-angles-demonstration/sssss3bs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complementary-angles-demonstration/sssss3bs"/>
      <lastmod>2026-11-02T02:27:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complementary-angles-demonstration/sssss3bs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complementary-angles-demonstration/sssss3bs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complementary-angles-demonstration/sssss3bs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complementary-angles-demonstration/sssss3bs"/>
      <lastmod>2026-11-02T02:27:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-rdraper/sssss3b7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-rdraper/sssss3b7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-demo-by-rdraper/sssss3b7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-rdraper/sssss3b7"/>
      <lastmod>2026-11-02T16:48:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-demo-by-rdraper/sssss3b7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-rdraper/sssss3b7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-demo-by-rdraper/sssss3b7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-rdraper/sssss3b7"/>
      <lastmod>2026-11-02T16:48:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euler-s-line-collinearity-of-circumcenter-centroid-and-orthocenter/sssss3bn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-s-line-collinearity-of-circumcenter-centroid-and-orthocenter/sssss3bn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-s-line-collinearity-of-circumcenter-centroid-and-orthocenter/sssss3bn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-s-line-collinearity-of-circumcenter-centroid-and-orthocenter/sssss3bn"/>
      <lastmod>2026-11-02T18:09:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euler-s-line-collinearity-of-circumcenter-centroid-and-orthocenter/sssss3bn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-s-line-collinearity-of-circumcenter-centroid-and-orthocenter/sssss3bn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-s-line-collinearity-of-circumcenter-centroid-and-orthocenter/sssss3bn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-s-line-collinearity-of-circumcenter-centroid-and-orthocenter/sssss3bn"/>
      <lastmod>2026-11-02T18:09:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/representing-a-prism/sssss3b2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-a-prism/sssss3b2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-a-prism/sssss3b2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-a-prism/sssss3b2"/>
      <lastmod>2026-11-02T16:51:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/representing-a-prism/sssss3b2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-a-prism/sssss3b2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-a-prism/sssss3b2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-a-prism/sssss3b2"/>
      <lastmod>2026-11-02T16:51:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/feuerbach-point-dynamic-demonstration/sssss3bk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/feuerbach-point-dynamic-demonstration/sssss3bk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/feuerbach-point-dynamic-demonstration/sssss3bk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/feuerbach-point-dynamic-demonstration/sssss3bk"/>
      <lastmod>2026-11-01T23:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/feuerbach-point-dynamic-demonstration/sssss3bk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/feuerbach-point-dynamic-demonstration/sssss3bk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/feuerbach-point-dynamic-demonstration/sssss3bk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/feuerbach-point-dynamic-demonstration/sssss3bk"/>
      <lastmod>2026-11-01T23:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-by-malin-christersson/sssss3bz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-malin-christersson/sssss3bz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-malin-christersson/sssss3bz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-malin-christersson/sssss3bz"/>
      <lastmod>2026-11-02T02:42:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-by-malin-christersson/sssss3bz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-malin-christersson/sssss3bz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-malin-christersson/sssss3bz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-malin-christersson/sssss3bz"/>
      <lastmod>2026-11-02T02:42:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-division/sssss3b0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-division/sssss3b0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-division/sssss3b0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-division/sssss3b0"/>
      <lastmod>2026-11-02T18:35:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-division/sssss3b0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-division/sssss3b0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-division/sssss3b0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-division/sssss3b0"/>
      <lastmod>2026-11-02T18:35:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/upward-and-downward-parabola/sssss3bd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/upward-and-downward-parabola/sssss3bd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/upward-and-downward-parabola/sssss3bd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/upward-and-downward-parabola/sssss3bd"/>
      <lastmod>2026-11-02T03:16:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/upward-and-downward-parabola/sssss3bd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/upward-and-downward-parabola/sssss3bd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/upward-and-downward-parabola/sssss3bd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/upward-and-downward-parabola/sssss3bd"/>
      <lastmod>2026-11-02T03:16:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-prism-dimensions-and-surface-area/sssss3bf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-dimensions-and-surface-area/sssss3bf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-dimensions-and-surface-area/sssss3bf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-dimensions-and-surface-area/sssss3bf"/>
      <lastmod>2026-11-02T09:33:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-prism-dimensions-and-surface-area/sssss3bf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-dimensions-and-surface-area/sssss3bf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-dimensions-and-surface-area/sssss3bf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-dimensions-and-surface-area/sssss3bf"/>
      <lastmod>2026-11-02T09:33:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-volume-calculation-example/sssss3b8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-example/sssss3b8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-example/sssss3b8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-example/sssss3b8"/>
      <lastmod>2026-11-01T20:17:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-volume-calculation-example/sssss3b8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-example/sssss3b8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-example/sssss3b8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-example/sssss3b8"/>
      <lastmod>2026-11-01T20:17:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-two-circles-by-stephanie-soto01/sssss3bu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-circles-by-stephanie-soto01/sssss3bu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-circles-by-stephanie-soto01/sssss3bu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-circles-by-stephanie-soto01/sssss3bu"/>
      <lastmod>2026-11-02T10:44:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-two-circles-by-stephanie-soto01/sssss3bu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-circles-by-stephanie-soto01/sssss3bu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-circles-by-stephanie-soto01/sssss3bu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-circles-by-stephanie-soto01/sssss3bu"/>
      <lastmod>2026-11-02T10:44:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-normal-distribution/sssss3b5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-normal-distribution/sssss3b5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-normal-distribution/sssss3b5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-normal-distribution/sssss3b5"/>
      <lastmod>2026-11-01T23:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-normal-distribution/sssss3b5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-normal-distribution/sssss3b5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-normal-distribution/sssss3b5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-normal-distribution/sssss3b5"/>
      <lastmod>2026-11-01T23:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-vectors/sssss3bb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-vectors/sssss3bb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-vectors/sssss3bb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-vectors/sssss3bb"/>
      <lastmod>2026-11-02T15:04:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-vectors/sssss3bb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-vectors/sssss3bb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-vectors/sssss3bb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-vectors/sssss3bb"/>
      <lastmod>2026-11-02T15:04:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-curve-families-tennis-and-basketball-via-translation-and-similarity/sssss3b3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-curve-families-tennis-and-basketball-via-translation-and-similarity/sssss3b3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-curve-families-tennis-and-basketball-via-translation-and-similarity/sssss3b3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-curve-families-tennis-and-basketball-via-translation-and-similarity/sssss3b3"/>
      <lastmod>2026-11-02T17:08:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-curve-families-tennis-and-basketball-via-translation-and-similarity/sssss3b3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-curve-families-tennis-and-basketball-via-translation-and-similarity/sssss3b3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-curve-families-tennis-and-basketball-via-translation-and-similarity/sssss3b3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-curve-families-tennis-and-basketball-via-translation-and-similarity/sssss3b3"/>
      <lastmod>2026-11-02T17:08:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-beauty-of-polygons/sssss3bq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-beauty-of-polygons/sssss3bq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-beauty-of-polygons/sssss3bq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-beauty-of-polygons/sssss3bq"/>
      <lastmod>2026-11-01T23:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-beauty-of-polygons/sssss3bq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-beauty-of-polygons/sssss3bq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-beauty-of-polygons/sssss3bq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-beauty-of-polygons/sssss3bq"/>
      <lastmod>2026-11-01T23:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-functions-by-gal/sssss3b1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-functions-by-gal/sssss3b1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-functions-by-gal/sssss3b1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-functions-by-gal/sssss3b1"/>
      <lastmod>2026-11-01T21:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-functions-by-gal/sssss3b1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-functions-by-gal/sssss3b1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-functions-by-gal/sssss3b1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-functions-by-gal/sssss3b1"/>
      <lastmod>2026-11-01T21:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-kite/sssss3bm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-kite/sssss3bm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-kite/sssss3bm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-kite/sssss3bm"/>
      <lastmod>2026-11-01T19:34:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-kite/sssss3bm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-kite/sssss3bm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-kite/sssss3bm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-kite/sssss3bm"/>
      <lastmod>2026-11-01T19:34:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-slope-line-drawing-practice/sssss3bj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-slope-line-drawing-practice/sssss3bj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-slope-line-drawing-practice/sssss3bj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-slope-line-drawing-practice/sssss3bj"/>
      <lastmod>2026-11-01T20:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-slope-line-drawing-practice/sssss3bj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-slope-line-drawing-practice/sssss3bj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-slope-line-drawing-practice/sssss3bj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-slope-line-drawing-practice/sssss3bj"/>
      <lastmod>2026-11-01T20:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-inches-to-centimeters/sssss3bp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-inches-to-centimeters/sssss3bp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-inches-to-centimeters/sssss3bp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-inches-to-centimeters/sssss3bp"/>
      <lastmod>2026-11-01T20:41:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-inches-to-centimeters/sssss3bp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-inches-to-centimeters/sssss3bp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-inches-to-centimeters/sssss3bp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-inches-to-centimeters/sssss3bp"/>
      <lastmod>2026-11-01T20:41:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-trigonometric-functions-and-vectors/sssss3bw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-trigonometric-functions-and-vectors/sssss3bw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-trigonometric-functions-and-vectors/sssss3bw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-trigonometric-functions-and-vectors/sssss3bw"/>
      <lastmod>2026-11-02T18:22:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-trigonometric-functions-and-vectors/sssss3bw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-trigonometric-functions-and-vectors/sssss3bw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-trigonometric-functions-and-vectors/sssss3bw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-trigonometric-functions-and-vectors/sssss3bw"/>
      <lastmod>2026-11-02T18:22:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-a-prism-from-polygon-to-solid/sssss3b6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-a-prism-from-polygon-to-solid/sssss3b6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-a-prism-from-polygon-to-solid/sssss3b6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-a-prism-from-polygon-to-solid/sssss3b6"/>
      <lastmod>2026-11-02T17:38:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-a-prism-from-polygon-to-solid/sssss3b6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-a-prism-from-polygon-to-solid/sssss3b6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-a-prism-from-polygon-to-solid/sssss3b6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-a-prism-from-polygon-to-solid/sssss3b6"/>
      <lastmod>2026-11-02T17:38:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/natural-logarithm-function-graph/sssss3bg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/natural-logarithm-function-graph/sssss3bg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/natural-logarithm-function-graph/sssss3bg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/natural-logarithm-function-graph/sssss3bg"/>
      <lastmod>2026-11-02T12:24:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/natural-logarithm-function-graph/sssss3bg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/natural-logarithm-function-graph/sssss3bg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/natural-logarithm-function-graph/sssss3bg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/natural-logarithm-function-graph/sssss3bg"/>
      <lastmod>2026-11-02T12:24:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maria-s-spiral-art-dynamic-geometry-with-parallelograms-and-perpendiculars/sssss3b9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maria-s-spiral-art-dynamic-geometry-with-parallelograms-and-perpendiculars/sssss3b9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maria-s-spiral-art-dynamic-geometry-with-parallelograms-and-perpendiculars/sssss3b9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maria-s-spiral-art-dynamic-geometry-with-parallelograms-and-perpendiculars/sssss3b9"/>
      <lastmod>2026-11-01T22:06:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maria-s-spiral-art-dynamic-geometry-with-parallelograms-and-perpendiculars/sssss3b9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maria-s-spiral-art-dynamic-geometry-with-parallelograms-and-perpendiculars/sssss3b9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maria-s-spiral-art-dynamic-geometry-with-parallelograms-and-perpendiculars/sssss3b9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maria-s-spiral-art-dynamic-geometry-with-parallelograms-and-perpendiculars/sssss3b9"/>
      <lastmod>2026-11-01T22:06:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualize-surfaces-of-revolution/sssss3be</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualize-surfaces-of-revolution/sssss3be"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualize-surfaces-of-revolution/sssss3be"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualize-surfaces-of-revolution/sssss3be"/>
      <lastmod>2026-11-02T18:03:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualize-surfaces-of-revolution/sssss3be</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualize-surfaces-of-revolution/sssss3be"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualize-surfaces-of-revolution/sssss3be"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualize-surfaces-of-revolution/sssss3be"/>
      <lastmod>2026-11-02T18:03:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-animation/sssss3bv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-animation/sssss3bv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-animation/sssss3bv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-animation/sssss3bv"/>
      <lastmod>2026-11-02T18:03:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-animation/sssss3bv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-animation/sssss3bv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-animation/sssss3bv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-animation/sssss3bv"/>
      <lastmod>2026-11-02T18:03:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-investigation/sssss3b4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-investigation/sssss3b4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-investigation/sssss3b4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-investigation/sssss3b4"/>
      <lastmod>2026-11-01T21:08:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-investigation/sssss3b4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-investigation/sssss3b4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-investigation/sssss3b4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-investigation/sssss3b4"/>
      <lastmod>2026-11-01T21:08:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wide-parabola-demo/sssss3bl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wide-parabola-demo/sssss3bl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wide-parabola-demo/sssss3bl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wide-parabola-demo/sssss3bl"/>
      <lastmod>2026-11-02T16:43:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wide-parabola-demo/sssss3bl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wide-parabola-demo/sssss3bl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wide-parabola-demo/sssss3bl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wide-parabola-demo/sssss3bl"/>
      <lastmod>2026-11-02T16:43:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-the-length-of-a-line-segment-geometric-construction/sssss3by</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-the-length-of-a-line-segment-geometric-construction/sssss3by"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-the-length-of-a-line-segment-geometric-construction/sssss3by"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-the-length-of-a-line-segment-geometric-construction/sssss3by"/>
      <lastmod>2026-11-01T23:04:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-the-length-of-a-line-segment-geometric-construction/sssss3by</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-the-length-of-a-line-segment-geometric-construction/sssss3by"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-the-length-of-a-line-segment-geometric-construction/sssss3by"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-the-length-of-a-line-segment-geometric-construction/sssss3by"/>
      <lastmod>2026-11-01T23:04:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotate-around-any-line/sssss3ba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotate-around-any-line/sssss3ba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotate-around-any-line/sssss3ba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotate-around-any-line/sssss3ba"/>
      <lastmod>2026-11-02T18:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotate-around-any-line/sssss3ba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotate-around-any-line/sssss3ba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotate-around-any-line/sssss3ba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotate-around-any-line/sssss3ba"/>
      <lastmod>2026-11-02T18:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-perpendicular-lines/sssss3bc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-perpendicular-lines/sssss3bc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-perpendicular-lines/sssss3bc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-perpendicular-lines/sssss3bc"/>
      <lastmod>2026-11-01T23:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-perpendicular-lines/sssss3bc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-perpendicular-lines/sssss3bc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-perpendicular-lines/sssss3bc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-perpendicular-lines/sssss3bc"/>
      <lastmod>2026-11-01T23:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-on-solving-equations-meaning/sssss3br</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-solving-equations-meaning/sssss3br"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-solving-equations-meaning/sssss3br"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-solving-equations-meaning/sssss3br"/>
      <lastmod>2026-11-02T17:38:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-on-solving-equations-meaning/sssss3br</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-solving-equations-meaning/sssss3br"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-solving-equations-meaning/sssss3br"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-solving-equations-meaning/sssss3br"/>
      <lastmod>2026-11-02T17:38:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-fractions-by-dave-pfaffle/sssss3bh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-dave-pfaffle/sssss3bh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-by-dave-pfaffle/sssss3bh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-dave-pfaffle/sssss3bh"/>
      <lastmod>2026-11-01T21:06:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-fractions-by-dave-pfaffle/sssss3bh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-dave-pfaffle/sssss3bh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-by-dave-pfaffle/sssss3bh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-dave-pfaffle/sssss3bh"/>
      <lastmod>2026-11-01T21:06:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-area-calculation/sssss3bt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-area-calculation/sssss3bt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-area-calculation/sssss3bt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-area-calculation/sssss3bt"/>
      <lastmod>2026-11-01T22:00:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-area-calculation/sssss3bt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-area-calculation/sssss3bt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-area-calculation/sssss3bt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-area-calculation/sssss3bt"/>
      <lastmod>2026-11-01T22:00:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/theorem-11-5-1-for-trapezoid/sssss3bx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/theorem-11-5-1-for-trapezoid/sssss3bx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/theorem-11-5-1-for-trapezoid/sssss3bx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/theorem-11-5-1-for-trapezoid/sssss3bx"/>
      <lastmod>2026-11-02T17:15:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/theorem-11-5-1-for-trapezoid/sssss3bx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/theorem-11-5-1-for-trapezoid/sssss3bx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/theorem-11-5-1-for-trapezoid/sssss3bx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/theorem-11-5-1-for-trapezoid/sssss3bx"/>
      <lastmod>2026-11-02T17:15:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotations-exploration/sssss3bi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-exploration/sssss3bi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-exploration/sssss3bi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-exploration/sssss3bi"/>
      <lastmod>2026-11-02T18:04:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotations-exploration/sssss3bi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-exploration/sssss3bi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-exploration/sssss3bi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-exploration/sssss3bi"/>
      <lastmod>2026-11-02T18:04:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-and-perimeter-of-parallelograms/sssss3bo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-parallelograms/sssss3bo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-parallelograms/sssss3bo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-parallelograms/sssss3bo"/>
      <lastmod>2026-11-02T18:22:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-and-perimeter-of-parallelograms/sssss3bo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-parallelograms/sssss3bo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-parallelograms/sssss3bo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-parallelograms/sssss3bo"/>
      <lastmod>2026-11-02T18:22:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-table-practice/sssss33s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-table-practice/sssss33s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-table-practice/sssss33s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-table-practice/sssss33s"/>
      <lastmod>2026-11-02T00:46:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-table-practice/sssss33s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-table-practice/sssss33s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-table-practice/sssss33s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-table-practice/sssss33s"/>
      <lastmod>2026-11-02T00:46:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/singapore-method-tool-visualizing-fractions-and-geometry/sssss337</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/singapore-method-tool-visualizing-fractions-and-geometry/sssss337"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/singapore-method-tool-visualizing-fractions-and-geometry/sssss337"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/singapore-method-tool-visualizing-fractions-and-geometry/sssss337"/>
      <lastmod>2026-11-02T18:44:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/singapore-method-tool-visualizing-fractions-and-geometry/sssss337</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/singapore-method-tool-visualizing-fractions-and-geometry/sssss337"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/singapore-method-tool-visualizing-fractions-and-geometry/sssss337"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/singapore-method-tool-visualizing-fractions-and-geometry/sssss337"/>
      <lastmod>2026-11-02T18:44:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-and-scaling/sssss33n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-scaling/sssss33n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-scaling/sssss33n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-scaling/sssss33n"/>
      <lastmod>2026-11-02T17:03:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-and-scaling/sssss33n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-scaling/sssss33n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-scaling/sssss33n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-scaling/sssss33n"/>
      <lastmod>2026-11-02T17:03:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-matrix/sssss332</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-matrix/sssss332"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-matrix/sssss332"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-matrix/sssss332"/>
      <lastmod>2026-11-02T02:31:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-matrix/sssss332</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-matrix/sssss332"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-matrix/sssss332"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-matrix/sssss332"/>
      <lastmod>2026-11-02T02:31:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introductory-questions-on-limits/sssss33k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introductory-questions-on-limits/sssss33k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introductory-questions-on-limits/sssss33k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introductory-questions-on-limits/sssss33k"/>
      <lastmod>2026-11-02T07:18:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introductory-questions-on-limits/sssss33k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introductory-questions-on-limits/sssss33k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introductory-questions-on-limits/sssss33k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introductory-questions-on-limits/sssss33k"/>
      <lastmod>2026-11-02T07:18:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/forced-vibrations-with-damping/sssss33z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/forced-vibrations-with-damping/sssss33z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/forced-vibrations-with-damping/sssss33z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/forced-vibrations-with-damping/sssss33z"/>
      <lastmod>2026-11-02T18:52:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/forced-vibrations-with-damping/sssss33z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/forced-vibrations-with-damping/sssss33z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/forced-vibrations-with-damping/sssss33z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/forced-vibrations-with-damping/sssss33z"/>
      <lastmod>2026-11-02T18:52:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-intersections-visualizing-elliptical-cross-sections-in-3d/sssss330</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-intersections-visualizing-elliptical-cross-sections-in-3d/sssss330"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-intersections-visualizing-elliptical-cross-sections-in-3d/sssss330"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-intersections-visualizing-elliptical-cross-sections-in-3d/sssss330"/>
      <lastmod>2026-11-02T18:54:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-intersections-visualizing-elliptical-cross-sections-in-3d/sssss330</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-intersections-visualizing-elliptical-cross-sections-in-3d/sssss330"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-intersections-visualizing-elliptical-cross-sections-in-3d/sssss330"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-intersections-visualizing-elliptical-cross-sections-in-3d/sssss330"/>
      <lastmod>2026-11-02T18:54:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lg-logo-2d-vector-geometry-construction/sssss33d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lg-logo-2d-vector-geometry-construction/sssss33d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lg-logo-2d-vector-geometry-construction/sssss33d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lg-logo-2d-vector-geometry-construction/sssss33d"/>
      <lastmod>2026-11-01T23:16:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lg-logo-2d-vector-geometry-construction/sssss33d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lg-logo-2d-vector-geometry-construction/sssss33d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lg-logo-2d-vector-geometry-construction/sssss33d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lg-logo-2d-vector-geometry-construction/sssss33d"/>
      <lastmod>2026-11-01T23:16:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-johnvannorman/sssss33f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-johnvannorman/sssss33f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-johnvannorman/sssss33f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-johnvannorman/sssss33f"/>
      <lastmod>2026-11-01T21:15:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-johnvannorman/sssss33f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-johnvannorman/sssss33f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-johnvannorman/sssss33f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-johnvannorman/sssss33f"/>
      <lastmod>2026-11-01T21:15:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-inscribed-angle-theorem-discovery/sssss338</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-inscribed-angle-theorem-discovery/sssss338"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-inscribed-angle-theorem-discovery/sssss338"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-inscribed-angle-theorem-discovery/sssss338"/>
      <lastmod>2026-11-02T00:35:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-inscribed-angle-theorem-discovery/sssss338</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-inscribed-angle-theorem-discovery/sssss338"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-inscribed-angle-theorem-discovery/sssss338"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-inscribed-angle-theorem-discovery/sssss338"/>
      <lastmod>2026-11-02T00:35:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modeling-with-linear-equations/sssss33u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-with-linear-equations/sssss33u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-with-linear-equations/sssss33u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-with-linear-equations/sssss33u"/>
      <lastmod>2026-11-01T23:17:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modeling-with-linear-equations/sssss33u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-with-linear-equations/sssss33u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-with-linear-equations/sssss33u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-with-linear-equations/sssss33u"/>
      <lastmod>2026-11-01T23:17:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-ratio/sssss335</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-ratio/sssss335"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-ratio/sssss335"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-ratio/sssss335"/>
      <lastmod>2026-11-02T00:04:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-ratio/sssss335</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-ratio/sssss335"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-ratio/sssss335"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-ratio/sssss335"/>
      <lastmod>2026-11-02T00:04:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-problem-2/sssss33b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-problem-2/sssss33b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-problem-2/sssss33b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-problem-2/sssss33b"/>
      <lastmod>2026-11-02T18:14:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-problem-2/sssss33b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-problem-2/sssss33b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-problem-2/sssss33b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-problem-2/sssss33b"/>
      <lastmod>2026-11-02T18:14:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mickey-mouse-theorem-dynamic-illustration/sssss333</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mickey-mouse-theorem-dynamic-illustration/sssss333"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mickey-mouse-theorem-dynamic-illustration/sssss333"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mickey-mouse-theorem-dynamic-illustration/sssss333"/>
      <lastmod>2026-11-02T17:02:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mickey-mouse-theorem-dynamic-illustration/sssss333</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mickey-mouse-theorem-dynamic-illustration/sssss333"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mickey-mouse-theorem-dynamic-illustration/sssss333"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mickey-mouse-theorem-dynamic-illustration/sssss333"/>
      <lastmod>2026-11-02T17:02:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euler-method-with-100-points-numerical-ode-solving-via-spreadsheet/sssss33q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-method-with-100-points-numerical-ode-solving-via-spreadsheet/sssss33q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-method-with-100-points-numerical-ode-solving-via-spreadsheet/sssss33q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-method-with-100-points-numerical-ode-solving-via-spreadsheet/sssss33q"/>
      <lastmod>2026-11-02T08:55:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euler-method-with-100-points-numerical-ode-solving-via-spreadsheet/sssss33q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-method-with-100-points-numerical-ode-solving-via-spreadsheet/sssss33q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-method-with-100-points-numerical-ode-solving-via-spreadsheet/sssss33q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-method-with-100-points-numerical-ode-solving-via-spreadsheet/sssss33q"/>
      <lastmod>2026-11-02T08:55:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-surface-area-calculation/sssss331</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-surface-area-calculation/sssss331"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-surface-area-calculation/sssss331"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-surface-area-calculation/sssss331"/>
      <lastmod>2026-11-02T09:46:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-surface-area-calculation/sssss331</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-surface-area-calculation/sssss331"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-surface-area-calculation/sssss331"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-surface-area-calculation/sssss331"/>
      <lastmod>2026-11-02T09:46:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-puthanet-hinsui/sssss33m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-puthanet-hinsui/sssss33m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-puthanet-hinsui/sssss33m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-puthanet-hinsui/sssss33m"/>
      <lastmod>2026-11-02T00:55:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-puthanet-hinsui/sssss33m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-puthanet-hinsui/sssss33m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-puthanet-hinsui/sssss33m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-puthanet-hinsui/sssss33m"/>
      <lastmod>2026-11-02T00:55:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-selecting-balls-by-elisabeth-bade/sssss33j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-elisabeth-bade/sssss33j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-selecting-balls-by-elisabeth-bade/sssss33j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-elisabeth-bade/sssss33j"/>
      <lastmod>2026-11-02T09:35:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-selecting-balls-by-elisabeth-bade/sssss33j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-elisabeth-bade/sssss33j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-selecting-balls-by-elisabeth-bade/sssss33j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-elisabeth-bade/sssss33j"/>
      <lastmod>2026-11-02T09:35:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-natural-numbers-demo/sssss33p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-natural-numbers-demo/sssss33p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-natural-numbers-demo/sssss33p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-natural-numbers-demo/sssss33p"/>
      <lastmod>2026-11-02T15:15:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-natural-numbers-demo/sssss33p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-natural-numbers-demo/sssss33p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-natural-numbers-demo/sssss33p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-natural-numbers-demo/sssss33p"/>
      <lastmod>2026-11-02T15:15:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-generator/sssss33w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-generator/sssss33w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-generator/sssss33w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-generator/sssss33w"/>
      <lastmod>2026-11-02T18:12:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-generator/sssss33w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-generator/sssss33w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-generator/sssss33w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-generator/sssss33w"/>
      <lastmod>2026-11-02T18:12:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilating-a-line/sssss336</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilating-a-line/sssss336"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilating-a-line/sssss336"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilating-a-line/sssss336"/>
      <lastmod>2026-11-01T22:08:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilating-a-line/sssss336</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilating-a-line/sssss336"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilating-a-line/sssss336"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilating-a-line/sssss336"/>
      <lastmod>2026-11-01T22:08:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-quiz/sssss33g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-quiz/sssss33g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-systems-by-graphing-quiz/sssss33g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-quiz/sssss33g"/>
      <lastmod>2026-11-01T19:09:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-systems-by-graphing-quiz/sssss33g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-quiz/sssss33g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-systems-by-graphing-quiz/sssss33g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-quiz/sssss33g"/>
      <lastmod>2026-11-01T19:09:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-sum-demonstration/sssss339</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-sum-demonstration/sssss339"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-sum-demonstration/sssss339"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-sum-demonstration/sssss339"/>
      <lastmod>2026-11-01T20:39:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-sum-demonstration/sssss339</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-sum-demonstration/sssss339"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-sum-demonstration/sssss339"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-sum-demonstration/sssss339"/>
      <lastmod>2026-11-01T20:39:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/friction-pulling-a-box-on-a-horizontal-surface/sssss33e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/friction-pulling-a-box-on-a-horizontal-surface/sssss33e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/friction-pulling-a-box-on-a-horizontal-surface/sssss33e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/friction-pulling-a-box-on-a-horizontal-surface/sssss33e"/>
      <lastmod>2026-11-01T19:00:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/friction-pulling-a-box-on-a-horizontal-surface/sssss33e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/friction-pulling-a-box-on-a-horizontal-surface/sssss33e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/friction-pulling-a-box-on-a-horizontal-surface/sssss33e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/friction-pulling-a-box-on-a-horizontal-surface/sssss33e"/>
      <lastmod>2026-11-01T19:00:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ferris-wheel-vertical-drop-animation-no-values/sssss33v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ferris-wheel-vertical-drop-animation-no-values/sssss33v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ferris-wheel-vertical-drop-animation-no-values/sssss33v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ferris-wheel-vertical-drop-animation-no-values/sssss33v"/>
      <lastmod>2026-11-02T18:02:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ferris-wheel-vertical-drop-animation-no-values/sssss33v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ferris-wheel-vertical-drop-animation-no-values/sssss33v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ferris-wheel-vertical-drop-animation-no-values/sssss33v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ferris-wheel-vertical-drop-animation-no-values/sssss33v"/>
      <lastmod>2026-11-02T18:02:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/math-dance/sssss334</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-dance/sssss334"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-dance/sssss334"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-dance/sssss334"/>
      <lastmod>2026-11-01T21:07:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/math-dance/sssss334</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-dance/sssss334"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-dance/sssss334"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-dance/sssss334"/>
      <lastmod>2026-11-01T21:07:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-parameter-model-transformations-of-the-icosahedron-with-extreme-distributi/sssss33l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-parameter-model-transformations-of-the-icosahedron-with-extreme-distributi/sssss33l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-parameter-model-transformations-of-the-icosahedron-with-extreme-distributi/sssss33l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-parameter-model-transformations-of-the-icosahedron-with-extreme-distributi/sssss33l"/>
      <lastmod>2026-11-01T19:18:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-parameter-model-transformations-of-the-icosahedron-with-extreme-distributi/sssss33l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-parameter-model-transformations-of-the-icosahedron-with-extreme-distributi/sssss33l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-parameter-model-transformations-of-the-icosahedron-with-extreme-distributi/sssss33l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-parameter-model-transformations-of-the-icosahedron-with-extreme-distributi/sssss33l"/>
      <lastmod>2026-11-01T19:18:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-annulus-by-rearrangement/sssss33y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-annulus-by-rearrangement/sssss33y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-annulus-by-rearrangement/sssss33y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-annulus-by-rearrangement/sssss33y"/>
      <lastmod>2026-11-01T21:53:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-annulus-by-rearrangement/sssss33y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-annulus-by-rearrangement/sssss33y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-annulus-by-rearrangement/sssss33y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-annulus-by-rearrangement/sssss33y"/>
      <lastmod>2026-11-01T21:53:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiples-of-a-natural-number-generator/sssss33a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiples-of-a-natural-number-generator/sssss33a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiples-of-a-natural-number-generator/sssss33a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiples-of-a-natural-number-generator/sssss33a"/>
      <lastmod>2026-11-02T00:27:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiples-of-a-natural-number-generator/sssss33a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiples-of-a-natural-number-generator/sssss33a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiples-of-a-natural-number-generator/sssss33a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiples-of-a-natural-number-generator/sssss33a"/>
      <lastmod>2026-11-02T00:27:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/classifying-real-numbers/sssss33c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-real-numbers/sssss33c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-real-numbers/sssss33c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-real-numbers/sssss33c"/>
      <lastmod>2026-11-02T00:11:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/classifying-real-numbers/sssss33c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-real-numbers/sssss33c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-real-numbers/sssss33c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-real-numbers/sssss33c"/>
      <lastmod>2026-11-02T00:11:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/general-definition-for-integral-1-x/sssss33r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-definition-for-integral-1-x/sssss33r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-definition-for-integral-1-x/sssss33r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-definition-for-integral-1-x/sssss33r"/>
      <lastmod>2026-11-01T21:34:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/general-definition-for-integral-1-x/sssss33r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-definition-for-integral-1-x/sssss33r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-definition-for-integral-1-x/sssss33r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-definition-for-integral-1-x/sssss33r"/>
      <lastmod>2026-11-01T21:34:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipses-and-hyperbolas/sssss33h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipses-and-hyperbolas/sssss33h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipses-and-hyperbolas/sssss33h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipses-and-hyperbolas/sssss33h"/>
      <lastmod>2026-11-02T16:36:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipses-and-hyperbolas/sssss33h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipses-and-hyperbolas/sssss33h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipses-and-hyperbolas/sssss33h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipses-and-hyperbolas/sssss33h"/>
      <lastmod>2026-11-02T16:36:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/position-vectors-demo/sssss33t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/position-vectors-demo/sssss33t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/position-vectors-demo/sssss33t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/position-vectors-demo/sssss33t"/>
      <lastmod>2026-11-01T21:17:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/position-vectors-demo/sssss33t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/position-vectors-demo/sssss33t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/position-vectors-demo/sssss33t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/position-vectors-demo/sssss33t"/>
      <lastmod>2026-11-01T21:17:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-1-17-practice-squares-and-cubes/sssss33x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-1-17-practice-squares-and-cubes/sssss33x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-1-17-practice-squares-and-cubes/sssss33x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-1-17-practice-squares-and-cubes/sssss33x"/>
      <lastmod>2026-11-01T23:07:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-1-17-practice-squares-and-cubes/sssss33x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-1-17-practice-squares-and-cubes/sssss33x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-1-17-practice-squares-and-cubes/sssss33x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-1-17-practice-squares-and-cubes/sssss33x"/>
      <lastmod>2026-11-01T23:07:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-geometry-construction-project-hn/sssss33i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-geometry-construction-project-hn/sssss33i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-geometry-construction-project-hn/sssss33i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-geometry-construction-project-hn/sssss33i"/>
      <lastmod>2026-11-02T16:57:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-geometry-construction-project-hn/sssss33i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-geometry-construction-project-hn/sssss33i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-geometry-construction-project-hn/sssss33i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-geometry-construction-project-hn/sssss33i"/>
      <lastmod>2026-11-02T16:57:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mixed-coordinate-system-natural-space-time-geometry/sssss33o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixed-coordinate-system-natural-space-time-geometry/sssss33o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixed-coordinate-system-natural-space-time-geometry/sssss33o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixed-coordinate-system-natural-space-time-geometry/sssss33o"/>
      <lastmod>2026-11-02T18:23:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mixed-coordinate-system-natural-space-time-geometry/sssss33o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixed-coordinate-system-natural-space-time-geometry/sssss33o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixed-coordinate-system-natural-space-time-geometry/sssss33o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixed-coordinate-system-natural-space-time-geometry/sssss33o"/>
      <lastmod>2026-11-02T18:23:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/representing-decimals-on-number-line/sssss3qs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-decimals-on-number-line/sssss3qs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-decimals-on-number-line/sssss3qs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-decimals-on-number-line/sssss3qs"/>
      <lastmod>2026-11-02T16:48:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/representing-decimals-on-number-line/sssss3qs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-decimals-on-number-line/sssss3qs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-decimals-on-number-line/sssss3qs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-decimals-on-number-line/sssss3qs"/>
      <lastmod>2026-11-02T16:48:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-and-1d-eigenspaces/sssss3q7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-and-1d-eigenspaces/sssss3q7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-and-1d-eigenspaces/sssss3q7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-and-1d-eigenspaces/sssss3q7"/>
      <lastmod>2026-11-01T20:49:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-and-1d-eigenspaces/sssss3q7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-and-1d-eigenspaces/sssss3q7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-and-1d-eigenspaces/sssss3q7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-and-1d-eigenspaces/sssss3q7"/>
      <lastmod>2026-11-01T20:49:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/luxembourg-coronavirus-cases-in-may-2020/sssss3qn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/luxembourg-coronavirus-cases-in-may-2020/sssss3qn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/luxembourg-coronavirus-cases-in-may-2020/sssss3qn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/luxembourg-coronavirus-cases-in-may-2020/sssss3qn"/>
      <lastmod>2026-11-01T20:45:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/luxembourg-coronavirus-cases-in-may-2020/sssss3qn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/luxembourg-coronavirus-cases-in-may-2020/sssss3qn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/luxembourg-coronavirus-cases-in-may-2020/sssss3qn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/luxembourg-coronavirus-cases-in-may-2020/sssss3qn"/>
      <lastmod>2026-11-01T20:45:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rlc-circuit-instantaneous-power-demonstration/sssss3q2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rlc-circuit-instantaneous-power-demonstration/sssss3q2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rlc-circuit-instantaneous-power-demonstration/sssss3q2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rlc-circuit-instantaneous-power-demonstration/sssss3q2"/>
      <lastmod>2026-11-01T21:59:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rlc-circuit-instantaneous-power-demonstration/sssss3q2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rlc-circuit-instantaneous-power-demonstration/sssss3q2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rlc-circuit-instantaneous-power-demonstration/sssss3q2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rlc-circuit-instantaneous-power-demonstration/sssss3q2"/>
      <lastmod>2026-11-01T21:59:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-triangular-prism-by-mrvisconti/sssss3qk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-triangular-prism-by-mrvisconti/sssss3qk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-triangular-prism-by-mrvisconti/sssss3qk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-triangular-prism-by-mrvisconti/sssss3qk"/>
      <lastmod>2026-11-01T20:45:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-triangular-prism-by-mrvisconti/sssss3qk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-triangular-prism-by-mrvisconti/sssss3qk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-triangular-prism-by-mrvisconti/sssss3qk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-triangular-prism-by-mrvisconti/sssss3qk"/>
      <lastmod>2026-11-01T20:45:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-wave-pattern-on-a-cylinder/sssss3qz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-pattern-on-a-cylinder/sssss3qz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-pattern-on-a-cylinder/sssss3qz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-pattern-on-a-cylinder/sssss3qz"/>
      <lastmod>2026-11-02T16:39:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-wave-pattern-on-a-cylinder/sssss3qz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-pattern-on-a-cylinder/sssss3qz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-pattern-on-a-cylinder/sssss3qz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-pattern-on-a-cylinder/sssss3qz"/>
      <lastmod>2026-11-02T16:39:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelograms-investigation/sssss3q0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-investigation/sssss3q0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-investigation/sssss3q0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-investigation/sssss3q0"/>
      <lastmod>2026-11-02T02:50:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelograms-investigation/sssss3q0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-investigation/sssss3q0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-investigation/sssss3q0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-investigation/sssss3q0"/>
      <lastmod>2026-11-02T02:50:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoidal-rule-demonstration/sssss3qd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoidal-rule-demonstration/sssss3qd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoidal-rule-demonstration/sssss3qd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoidal-rule-demonstration/sssss3qd"/>
      <lastmod>2026-11-01T23:46:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoidal-rule-demonstration/sssss3qd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoidal-rule-demonstration/sssss3qd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoidal-rule-demonstration/sssss3qd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoidal-rule-demonstration/sssss3qd"/>
      <lastmod>2026-11-01T23:46:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-animation-effects-of-mean-and-standard-deviation/sssss3qf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-animation-effects-of-mean-and-standard-deviation/sssss3qf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-animation-effects-of-mean-and-standard-deviation/sssss3qf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-animation-effects-of-mean-and-standard-deviation/sssss3qf"/>
      <lastmod>2026-11-01T21:42:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-animation-effects-of-mean-and-standard-deviation/sssss3qf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-animation-effects-of-mean-and-standard-deviation/sssss3qf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-animation-effects-of-mean-and-standard-deviation/sssss3qf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-animation-effects-of-mean-and-standard-deviation/sssss3qf"/>
      <lastmod>2026-11-01T21:42:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demonstration-of-the-parallel-axis-theorem/sssss3q8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-the-parallel-axis-theorem/sssss3q8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-the-parallel-axis-theorem/sssss3q8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-the-parallel-axis-theorem/sssss3q8"/>
      <lastmod>2026-11-02T18:33:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demonstration-of-the-parallel-axis-theorem/sssss3q8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-the-parallel-axis-theorem/sssss3q8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-the-parallel-axis-theorem/sssss3q8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-the-parallel-axis-theorem/sssss3q8"/>
      <lastmod>2026-11-02T18:33:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-by-matthew-p-wilson/sssss3qu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-by-matthew-p-wilson/sssss3qu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-by-matthew-p-wilson/sssss3qu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-by-matthew-p-wilson/sssss3qu"/>
      <lastmod>2026-11-01T21:18:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-by-matthew-p-wilson/sssss3qu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-by-matthew-p-wilson/sssss3qu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-by-matthew-p-wilson/sssss3qu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-by-matthew-p-wilson/sssss3qu"/>
      <lastmod>2026-11-01T21:18:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/taylor-polynomials/sssss3q5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-polynomials/sssss3q5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-polynomials/sssss3q5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-polynomials/sssss3q5"/>
      <lastmod>2026-11-01T21:55:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/taylor-polynomials/sssss3q5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-polynomials/sssss3q5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-polynomials/sssss3q5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-polynomials/sssss3q5"/>
      <lastmod>2026-11-01T21:55:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-intersections-by-chritsopher/sssss3qb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-intersections-by-chritsopher/sssss3qb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-intersections-by-chritsopher/sssss3qb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-intersections-by-chritsopher/sssss3qb"/>
      <lastmod>2026-11-01T21:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-intersections-by-chritsopher/sssss3qb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-intersections-by-chritsopher/sssss3qb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-intersections-by-chritsopher/sssss3qb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-intersections-by-chritsopher/sssss3qb"/>
      <lastmod>2026-11-01T21:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-translations/sssss3q3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-translations/sssss3q3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-translations/sssss3q3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-translations/sssss3q3"/>
      <lastmod>2026-11-02T09:33:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-translations/sssss3q3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-translations/sssss3q3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-translations/sssss3q3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-translations/sssss3q3"/>
      <lastmod>2026-11-02T09:33:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-definition-pa-pb-2a/sssss3qq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-definition-pa-pb-2a/sssss3qq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-definition-pa-pb-2a/sssss3qq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-definition-pa-pb-2a/sssss3qq"/>
      <lastmod>2026-11-02T08:39:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-definition-pa-pb-2a/sssss3qq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-definition-pa-pb-2a/sssss3qq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-definition-pa-pb-2a/sssss3qq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-definition-pa-pb-2a/sssss3qq"/>
      <lastmod>2026-11-02T08:39:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-pyramid-anatomy-modifiable-discovery-lesson/sssss3q1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid-anatomy-modifiable-discovery-lesson/sssss3q1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid-anatomy-modifiable-discovery-lesson/sssss3q1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid-anatomy-modifiable-discovery-lesson/sssss3q1"/>
      <lastmod>2026-11-01T21:48:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-pyramid-anatomy-modifiable-discovery-lesson/sssss3q1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid-anatomy-modifiable-discovery-lesson/sssss3q1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid-anatomy-modifiable-discovery-lesson/sssss3q1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid-anatomy-modifiable-discovery-lesson/sssss3q1"/>
      <lastmod>2026-11-01T21:48:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-and-linear-programming-demo/sssss3qm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-and-linear-programming-demo/sssss3qm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-and-linear-programming-demo/sssss3qm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-and-linear-programming-demo/sssss3qm"/>
      <lastmod>2026-11-02T16:51:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-and-linear-programming-demo/sssss3qm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-and-linear-programming-demo/sssss3qm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-and-linear-programming-demo/sssss3qm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-and-linear-programming-demo/sssss3qm"/>
      <lastmod>2026-11-02T16:51:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/broken-stick-triangle-simulation-can-random-breaks-form-a-triangle/sssss3qj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/broken-stick-triangle-simulation-can-random-breaks-form-a-triangle/sssss3qj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/broken-stick-triangle-simulation-can-random-breaks-form-a-triangle/sssss3qj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/broken-stick-triangle-simulation-can-random-breaks-form-a-triangle/sssss3qj"/>
      <lastmod>2026-11-01T20:45:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/broken-stick-triangle-simulation-can-random-breaks-form-a-triangle/sssss3qj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/broken-stick-triangle-simulation-can-random-breaks-form-a-triangle/sssss3qj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/broken-stick-triangle-simulation-can-random-breaks-form-a-triangle/sssss3qj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/broken-stick-triangle-simulation-can-random-breaks-form-a-triangle/sssss3qj"/>
      <lastmod>2026-11-01T20:45:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chinese-match-puzzles-1-8-puzzles/sssss3qp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chinese-match-puzzles-1-8-puzzles/sssss3qp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chinese-match-puzzles-1-8-puzzles/sssss3qp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chinese-match-puzzles-1-8-puzzles/sssss3qp"/>
      <lastmod>2026-11-02T15:32:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chinese-match-puzzles-1-8-puzzles/sssss3qp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chinese-match-puzzles-1-8-puzzles/sssss3qp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chinese-match-puzzles-1-8-puzzles/sssss3qp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chinese-match-puzzles-1-8-puzzles/sssss3qp"/>
      <lastmod>2026-11-02T15:32:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculus-surface-area/sssss3qw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculus-surface-area/sssss3qw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculus-surface-area/sssss3qw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculus-surface-area/sssss3qw"/>
      <lastmod>2026-11-02T16:49:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculus-surface-area/sssss3qw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculus-surface-area/sssss3qw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculus-surface-area/sssss3qw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculus-surface-area/sssss3qw"/>
      <lastmod>2026-11-02T16:49:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-normal-densities/sssss3q6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-normal-densities/sssss3q6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-normal-densities/sssss3q6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-normal-densities/sssss3q6"/>
      <lastmod>2026-11-02T17:54:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-normal-densities/sssss3q6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-normal-densities/sssss3q6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-normal-densities/sssss3q6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-normal-densities/sssss3q6"/>
      <lastmod>2026-11-02T17:54:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transforming-exponential-functions/sssss3qg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-exponential-functions/sssss3qg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-exponential-functions/sssss3qg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-exponential-functions/sssss3qg"/>
      <lastmod>2026-11-02T18:55:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transforming-exponential-functions/sssss3qg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-exponential-functions/sssss3qg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-exponential-functions/sssss3qg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-exponential-functions/sssss3qg"/>
      <lastmod>2026-11-02T18:55:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-perpendicular-bisector-of-a-line-segment/sssss3q9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-perpendicular-bisector-of-a-line-segment/sssss3q9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-perpendicular-bisector-of-a-line-segment/sssss3q9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-perpendicular-bisector-of-a-line-segment/sssss3q9"/>
      <lastmod>2026-11-01T21:28:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-perpendicular-bisector-of-a-line-segment/sssss3q9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-perpendicular-bisector-of-a-line-segment/sssss3q9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-perpendicular-bisector-of-a-line-segment/sssss3q9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-perpendicular-bisector-of-a-line-segment/sssss3q9"/>
      <lastmod>2026-11-01T21:28:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euclidean-division-demo/sssss3qe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euclidean-division-demo/sssss3qe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euclidean-division-demo/sssss3qe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euclidean-division-demo/sssss3qe"/>
      <lastmod>2026-11-02T02:21:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euclidean-division-demo/sssss3qe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euclidean-division-demo/sssss3qe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euclidean-division-demo/sssss3qe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euclidean-division-demo/sssss3qe"/>
      <lastmod>2026-11-02T02:21:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-tschirnhaus-s-cubic/sssss3qv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-tschirnhaus-s-cubic/sssss3qv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-tschirnhaus-s-cubic/sssss3qv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-tschirnhaus-s-cubic/sssss3qv"/>
      <lastmod>2026-11-02T16:35:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-tschirnhaus-s-cubic/sssss3qv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-tschirnhaus-s-cubic/sssss3qv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-tschirnhaus-s-cubic/sssss3qv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-tschirnhaus-s-cubic/sssss3qv"/>
      <lastmod>2026-11-02T16:35:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-banco-de-santander-logo/sssss3q4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-banco-de-santander-logo/sssss3q4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-banco-de-santander-logo/sssss3q4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-banco-de-santander-logo/sssss3q4"/>
      <lastmod>2026-11-01T23:15:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-banco-de-santander-logo/sssss3q4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-banco-de-santander-logo/sssss3q4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-banco-de-santander-logo/sssss3q4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-banco-de-santander-logo/sssss3q4"/>
      <lastmod>2026-11-01T23:15:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multivariable-calculus-surfaces-and-traces-demo/sssss3ql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multivariable-calculus-surfaces-and-traces-demo/sssss3ql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multivariable-calculus-surfaces-and-traces-demo/sssss3ql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multivariable-calculus-surfaces-and-traces-demo/sssss3ql"/>
      <lastmod>2026-11-01T21:26:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multivariable-calculus-surfaces-and-traces-demo/sssss3ql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multivariable-calculus-surfaces-and-traces-demo/sssss3ql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multivariable-calculus-surfaces-and-traces-demo/sssss3ql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multivariable-calculus-surfaces-and-traces-demo/sssss3ql"/>
      <lastmod>2026-11-01T21:26:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/weighted-geometric-median-weber-problem/sssss3qy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/weighted-geometric-median-weber-problem/sssss3qy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/weighted-geometric-median-weber-problem/sssss3qy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/weighted-geometric-median-weber-problem/sssss3qy"/>
      <lastmod>2026-11-01T23:46:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/weighted-geometric-median-weber-problem/sssss3qy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/weighted-geometric-median-weber-problem/sssss3qy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/weighted-geometric-median-weber-problem/sssss3qy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/weighted-geometric-median-weber-problem/sssss3qy"/>
      <lastmod>2026-11-01T23:46:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cone-construction/sssss3qa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone-construction/sssss3qa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone-construction/sssss3qa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone-construction/sssss3qa"/>
      <lastmod>2026-11-02T18:19:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cone-construction/sssss3qa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone-construction/sssss3qa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone-construction/sssss3qa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone-construction/sssss3qa"/>
      <lastmod>2026-11-02T18:19:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mapping-1-z-geogebra-demonstration/sssss3qc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-1-z-geogebra-demonstration/sssss3qc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-1-z-geogebra-demonstration/sssss3qc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-1-z-geogebra-demonstration/sssss3qc"/>
      <lastmod>2026-11-01T23:35:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mapping-1-z-geogebra-demonstration/sssss3qc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-1-z-geogebra-demonstration/sssss3qc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-1-z-geogebra-demonstration/sssss3qc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-1-z-geogebra-demonstration/sssss3qc"/>
      <lastmod>2026-11-01T23:35:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equation-of-a-straight-line/sssss3qr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-a-straight-line/sssss3qr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-a-straight-line/sssss3qr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-a-straight-line/sssss3qr"/>
      <lastmod>2026-11-02T00:34:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equation-of-a-straight-line/sssss3qr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-a-straight-line/sssss3qr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-a-straight-line/sssss3qr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-a-straight-line/sssss3qr"/>
      <lastmod>2026-11-02T00:34:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-sine-and-cosine-functions-by-nroc-project/sssss3qh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-and-cosine-functions-by-nroc-project/sssss3qh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-sine-and-cosine-functions-by-nroc-project/sssss3qh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-and-cosine-functions-by-nroc-project/sssss3qh"/>
      <lastmod>2026-11-02T11:03:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-sine-and-cosine-functions-by-nroc-project/sssss3qh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-and-cosine-functions-by-nroc-project/sssss3qh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-sine-and-cosine-functions-by-nroc-project/sssss3qh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-and-cosine-functions-by-nroc-project/sssss3qh"/>
      <lastmod>2026-11-02T11:03:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-rotation-about-y-axis/sssss3qt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rotation-about-y-axis/sssss3qt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rotation-about-y-axis/sssss3qt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rotation-about-y-axis/sssss3qt"/>
      <lastmod>2026-11-02T14:59:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-rotation-about-y-axis/sssss3qt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rotation-about-y-axis/sssss3qt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rotation-about-y-axis/sssss3qt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rotation-about-y-axis/sssss3qt"/>
      <lastmod>2026-11-02T14:59:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mishal-pyramid/sssss3qx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mishal-pyramid/sssss3qx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mishal-pyramid/sssss3qx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mishal-pyramid/sssss3qx"/>
      <lastmod>2026-11-02T02:47:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mishal-pyramid/sssss3qx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mishal-pyramid/sssss3qx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mishal-pyramid/sssss3qx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mishal-pyramid/sssss3qx"/>
      <lastmod>2026-11-02T02:47:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rational-exponents-and-vectors/sssss3qi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-exponents-and-vectors/sssss3qi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-exponents-and-vectors/sssss3qi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-exponents-and-vectors/sssss3qi"/>
      <lastmod>2026-11-02T08:45:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rational-exponents-and-vectors/sssss3qi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-exponents-and-vectors/sssss3qi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-exponents-and-vectors/sssss3qi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-exponents-and-vectors/sssss3qi"/>
      <lastmod>2026-11-02T08:45:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-and-scalar-multiplication-a-geometric-and-algebraic-demonstration/sssss3qo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-scalar-multiplication-a-geometric-and-algebraic-demonstration/sssss3qo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-scalar-multiplication-a-geometric-and-algebraic-demonstration/sssss3qo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-scalar-multiplication-a-geometric-and-algebraic-demonstration/sssss3qo"/>
      <lastmod>2026-11-02T00:32:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-and-scalar-multiplication-a-geometric-and-algebraic-demonstration/sssss3qo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-scalar-multiplication-a-geometric-and-algebraic-demonstration/sssss3qo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-scalar-multiplication-a-geometric-and-algebraic-demonstration/sssss3qo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-scalar-multiplication-a-geometric-and-algebraic-demonstration/sssss3qo"/>
      <lastmod>2026-11-02T00:32:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-the-area-of-a-triangle-in-3d/sssss31s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-the-area-of-a-triangle-in-3d/sssss31s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-the-area-of-a-triangle-in-3d/sssss31s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-the-area-of-a-triangle-in-3d/sssss31s"/>
      <lastmod>2026-11-01T23:17:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-the-area-of-a-triangle-in-3d/sssss31s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-the-area-of-a-triangle-in-3d/sssss31s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-the-area-of-a-triangle-in-3d/sssss31s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-the-area-of-a-triangle-in-3d/sssss31s"/>
      <lastmod>2026-11-01T23:17:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translations-of-lines/sssss317</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-of-lines/sssss317"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-of-lines/sssss317"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-of-lines/sssss317"/>
      <lastmod>2026-11-02T18:58:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translations-of-lines/sssss317</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-of-lines/sssss317"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-of-lines/sssss317"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-of-lines/sssss317"/>
      <lastmod>2026-11-02T18:58:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/median-point-and-parabola/sssss31n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/median-point-and-parabola/sssss31n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/median-point-and-parabola/sssss31n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/median-point-and-parabola/sssss31n"/>
      <lastmod>2026-11-02T17:50:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/median-point-and-parabola/sssss31n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/median-point-and-parabola/sssss31n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/median-point-and-parabola/sssss31n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/median-point-and-parabola/sssss31n"/>
      <lastmod>2026-11-02T17:50:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-cube/sssss312</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cube/sssss312"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cube/sssss312"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cube/sssss312"/>
      <lastmod>2026-11-01T19:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-cube/sssss312</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cube/sssss312"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cube/sssss312"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cube/sssss312"/>
      <lastmod>2026-11-01T19:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tracing-paper-reflection-transformation/sssss31k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tracing-paper-reflection-transformation/sssss31k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tracing-paper-reflection-transformation/sssss31k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tracing-paper-reflection-transformation/sssss31k"/>
      <lastmod>2026-11-02T18:14:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tracing-paper-reflection-transformation/sssss31k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tracing-paper-reflection-transformation/sssss31k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tracing-paper-reflection-transformation/sssss31k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tracing-paper-reflection-transformation/sssss31k"/>
      <lastmod>2026-11-02T18:14:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-of-three-vectors/sssss31z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-three-vectors/sssss31z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-three-vectors/sssss31z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-three-vectors/sssss31z"/>
      <lastmod>2026-11-01T19:00:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-of-three-vectors/sssss31z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-three-vectors/sssss31z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-three-vectors/sssss31z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-three-vectors/sssss31z"/>
      <lastmod>2026-11-01T19:00:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-function-transformations/sssss310</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-transformations/sssss310"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-transformations/sssss310"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-transformations/sssss310"/>
      <lastmod>2026-11-01T23:48:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-function-transformations/sssss310</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-transformations/sssss310"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-transformations/sssss310"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-transformations/sssss310"/>
      <lastmod>2026-11-01T23:48:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-between-two-curves-by-el-mostafa-kalmoun/sssss31d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-between-two-curves-by-el-mostafa-kalmoun/sssss31d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-between-two-curves-by-el-mostafa-kalmoun/sssss31d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-between-two-curves-by-el-mostafa-kalmoun/sssss31d"/>
      <lastmod>2026-11-01T19:25:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-between-two-curves-by-el-mostafa-kalmoun/sssss31d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-between-two-curves-by-el-mostafa-kalmoun/sssss31d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-between-two-curves-by-el-mostafa-kalmoun/sssss31d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-between-two-curves-by-el-mostafa-kalmoun/sssss31d"/>
      <lastmod>2026-11-01T19:25:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-and-modifiable-composite-solid/sssss31f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-and-modifiable-composite-solid/sssss31f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-and-modifiable-composite-solid/sssss31f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-and-modifiable-composite-solid/sssss31f"/>
      <lastmod>2026-11-02T18:57:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-and-modifiable-composite-solid/sssss31f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-and-modifiable-composite-solid/sssss31f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-and-modifiable-composite-solid/sssss31f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-and-modifiable-composite-solid/sssss31f"/>
      <lastmod>2026-11-02T18:57:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/types-of-angles-by-ooi-soo-huat/sssss318</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/types-of-angles-by-ooi-soo-huat/sssss318"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/types-of-angles-by-ooi-soo-huat/sssss318"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/types-of-angles-by-ooi-soo-huat/sssss318"/>
      <lastmod>2026-11-02T16:51:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/types-of-angles-by-ooi-soo-huat/sssss318</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/types-of-angles-by-ooi-soo-huat/sssss318"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/types-of-angles-by-ooi-soo-huat/sssss318"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/types-of-angles-by-ooi-soo-huat/sssss318"/>
      <lastmod>2026-11-02T16:51:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/part-part-whole-model-with-bars-and-circles/sssss31u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/part-part-whole-model-with-bars-and-circles/sssss31u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/part-part-whole-model-with-bars-and-circles/sssss31u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/part-part-whole-model-with-bars-and-circles/sssss31u"/>
      <lastmod>2026-11-02T17:07:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/part-part-whole-model-with-bars-and-circles/sssss31u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/part-part-whole-model-with-bars-and-circles/sssss31u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/part-part-whole-model-with-bars-and-circles/sssss31u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/part-part-whole-model-with-bars-and-circles/sssss31u"/>
      <lastmod>2026-11-02T17:07:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-two-vectors-using-direction-vector/sssss315</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-vectors-using-direction-vector/sssss315"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-vectors-using-direction-vector/sssss315"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-vectors-using-direction-vector/sssss315"/>
      <lastmod>2026-11-02T18:07:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-two-vectors-using-direction-vector/sssss315</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-vectors-using-direction-vector/sssss315"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-vectors-using-direction-vector/sssss315"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-vectors-using-direction-vector/sssss315"/>
      <lastmod>2026-11-02T18:07:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diagonals-of-a-parallelogram-demo/sssss31b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-a-parallelogram-demo/sssss31b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-a-parallelogram-demo/sssss31b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-a-parallelogram-demo/sssss31b"/>
      <lastmod>2026-11-01T21:52:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diagonals-of-a-parallelogram-demo/sssss31b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-a-parallelogram-demo/sssss31b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-a-parallelogram-demo/sssss31b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-a-parallelogram-demo/sssss31b"/>
      <lastmod>2026-11-01T21:52:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-dynamic-construction-for-centroid-study/sssss313</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-dynamic-construction-for-centroid-study/sssss313"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-dynamic-construction-for-centroid-study/sssss313"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-dynamic-construction-for-centroid-study/sssss313"/>
      <lastmod>2026-11-01T23:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-dynamic-construction-for-centroid-study/sssss313</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-dynamic-construction-for-centroid-study/sssss313"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-dynamic-construction-for-centroid-study/sssss313"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-dynamic-construction-for-centroid-study/sssss313"/>
      <lastmod>2026-11-01T23:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/composite-solid-demonstration/sssss31q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-solid-demonstration/sssss31q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-solid-demonstration/sssss31q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-solid-demonstration/sssss31q"/>
      <lastmod>2026-11-01T21:28:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/composite-solid-demonstration/sssss31q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-solid-demonstration/sssss31q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-solid-demonstration/sssss31q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-solid-demonstration/sssss31q"/>
      <lastmod>2026-11-01T21:28:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dice-addition/sssss311</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dice-addition/sssss311"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dice-addition/sssss311"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dice-addition/sssss311"/>
      <lastmod>2026-11-01T21:09:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dice-addition/sssss311</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dice-addition/sssss311"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dice-addition/sssss311"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dice-addition/sssss311"/>
      <lastmod>2026-11-01T21:09:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/total-internal-reflection-simulation/sssss31m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/total-internal-reflection-simulation/sssss31m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/total-internal-reflection-simulation/sssss31m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/total-internal-reflection-simulation/sssss31m"/>
      <lastmod>2026-11-01T19:11:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/total-internal-reflection-simulation/sssss31m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/total-internal-reflection-simulation/sssss31m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/total-internal-reflection-simulation/sssss31m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/total-internal-reflection-simulation/sssss31m"/>
      <lastmod>2026-11-01T19:11:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sliding-point-and-line-coefficient-changes/sssss31j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliding-point-and-line-coefficient-changes/sssss31j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliding-point-and-line-coefficient-changes/sssss31j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliding-point-and-line-coefficient-changes/sssss31j"/>
      <lastmod>2026-11-01T23:32:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sliding-point-and-line-coefficient-changes/sssss31j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliding-point-and-line-coefficient-changes/sssss31j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliding-point-and-line-coefficient-changes/sssss31j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliding-point-and-line-coefficient-changes/sssss31j"/>
      <lastmod>2026-11-01T23:32:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-series-with-complex-numbers/sssss31p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-series-with-complex-numbers/sssss31p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-series-with-complex-numbers/sssss31p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-series-with-complex-numbers/sssss31p"/>
      <lastmod>2026-11-01T21:59:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-series-with-complex-numbers/sssss31p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-series-with-complex-numbers/sssss31p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-series-with-complex-numbers/sssss31p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-series-with-complex-numbers/sssss31p"/>
      <lastmod>2026-11-01T21:59:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dimensions-of-a-rhombus/sssss31w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dimensions-of-a-rhombus/sssss31w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dimensions-of-a-rhombus/sssss31w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dimensions-of-a-rhombus/sssss31w"/>
      <lastmod>2026-11-02T17:44:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dimensions-of-a-rhombus/sssss31w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dimensions-of-a-rhombus/sssss31w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dimensions-of-a-rhombus/sssss31w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dimensions-of-a-rhombus/sssss31w"/>
      <lastmod>2026-11-02T17:44:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-definition-by-smatherit/sssss316</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-definition-by-smatherit/sssss316"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-definition-by-smatherit/sssss316"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-definition-by-smatherit/sssss316"/>
      <lastmod>2026-11-01T21:19:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-definition-by-smatherit/sssss316</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-definition-by-smatherit/sssss316"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-definition-by-smatherit/sssss316"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-definition-by-smatherit/sssss316"/>
      <lastmod>2026-11-01T21:19:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-chlafrance02/sssss31g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-chlafrance02/sssss31g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-demonstration-by-chlafrance02/sssss31g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-chlafrance02/sssss31g"/>
      <lastmod>2026-11-02T16:43:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-mean-demonstration-by-chlafrance02/sssss31g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-chlafrance02/sssss31g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-demonstration-by-chlafrance02/sssss31g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-chlafrance02/sssss31g"/>
      <lastmod>2026-11-02T16:43:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rate-of-change-with-limits-visualizing-tangent-slope-and-derivative/sssss319</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rate-of-change-with-limits-visualizing-tangent-slope-and-derivative/sssss319"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rate-of-change-with-limits-visualizing-tangent-slope-and-derivative/sssss319"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rate-of-change-with-limits-visualizing-tangent-slope-and-derivative/sssss319"/>
      <lastmod>2026-11-02T18:24:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rate-of-change-with-limits-visualizing-tangent-slope-and-derivative/sssss319</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rate-of-change-with-limits-visualizing-tangent-slope-and-derivative/sssss319"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rate-of-change-with-limits-visualizing-tangent-slope-and-derivative/sssss319"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rate-of-change-with-limits-visualizing-tangent-slope-and-derivative/sssss319"/>
      <lastmod>2026-11-02T18:24:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simulating-bubble-generation-with-poisson-process/sssss31e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simulating-bubble-generation-with-poisson-process/sssss31e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simulating-bubble-generation-with-poisson-process/sssss31e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simulating-bubble-generation-with-poisson-process/sssss31e"/>
      <lastmod>2026-11-02T18:00:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simulating-bubble-generation-with-poisson-process/sssss31e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simulating-bubble-generation-with-poisson-process/sssss31e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simulating-bubble-generation-with-poisson-process/sssss31e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simulating-bubble-generation-with-poisson-process/sssss31e"/>
      <lastmod>2026-11-02T18:00:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copy-a-line-segment-compass-and-straightedge/sssss31v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-compass-and-straightedge/sssss31v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-a-line-segment-compass-and-straightedge/sssss31v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-compass-and-straightedge/sssss31v"/>
      <lastmod>2026-11-02T09:06:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copy-a-line-segment-compass-and-straightedge/sssss31v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-compass-and-straightedge/sssss31v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-a-line-segment-compass-and-straightedge/sssss31v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-compass-and-straightedge/sssss31v"/>
      <lastmod>2026-11-02T09:06:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transforming-exponential-functions-by-changing-the-base/sssss314</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-exponential-functions-by-changing-the-base/sssss314"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-exponential-functions-by-changing-the-base/sssss314"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-exponential-functions-by-changing-the-base/sssss314"/>
      <lastmod>2026-11-02T15:36:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transforming-exponential-functions-by-changing-the-base/sssss314</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-exponential-functions-by-changing-the-base/sssss314"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-exponential-functions-by-changing-the-base/sssss314"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-exponential-functions-by-changing-the-base/sssss314"/>
      <lastmod>2026-11-02T15:36:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intuitive-introduction-to-volume-by-tim-brzezinski/sssss31l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intuitive-introduction-to-volume-by-tim-brzezinski/sssss31l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intuitive-introduction-to-volume-by-tim-brzezinski/sssss31l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intuitive-introduction-to-volume-by-tim-brzezinski/sssss31l"/>
      <lastmod>2026-11-01T23:54:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intuitive-introduction-to-volume-by-tim-brzezinski/sssss31l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intuitive-introduction-to-volume-by-tim-brzezinski/sssss31l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intuitive-introduction-to-volume-by-tim-brzezinski/sssss31l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intuitive-introduction-to-volume-by-tim-brzezinski/sssss31l"/>
      <lastmod>2026-11-01T23:54:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/octonion-multiplication-chart-and-fano-plane/sssss31y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octonion-multiplication-chart-and-fano-plane/sssss31y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octonion-multiplication-chart-and-fano-plane/sssss31y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octonion-multiplication-chart-and-fano-plane/sssss31y"/>
      <lastmod>2026-11-02T16:36:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/octonion-multiplication-chart-and-fano-plane/sssss31y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octonion-multiplication-chart-and-fano-plane/sssss31y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octonion-multiplication-chart-and-fano-plane/sssss31y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octonion-multiplication-chart-and-fano-plane/sssss31y"/>
      <lastmod>2026-11-02T16:36:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triple-integral-in-cylindrical-coordinates-visualizer/sssss31a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triple-integral-in-cylindrical-coordinates-visualizer/sssss31a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triple-integral-in-cylindrical-coordinates-visualizer/sssss31a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triple-integral-in-cylindrical-coordinates-visualizer/sssss31a"/>
      <lastmod>2026-11-01T23:11:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triple-integral-in-cylindrical-coordinates-visualizer/sssss31a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triple-integral-in-cylindrical-coordinates-visualizer/sssss31a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triple-integral-in-cylindrical-coordinates-visualizer/sssss31a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triple-integral-in-cylindrical-coordinates-visualizer/sssss31a"/>
      <lastmod>2026-11-01T23:11:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-using-disks/sssss31c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-using-disks/sssss31c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-using-disks/sssss31c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-using-disks/sssss31c"/>
      <lastmod>2026-11-02T09:28:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-using-disks/sssss31c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-using-disks/sssss31c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-using-disks/sssss31c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-using-disks/sssss31c"/>
      <lastmod>2026-11-02T09:28:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-composite-shape/sssss31r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-composite-shape/sssss31r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-composite-shape/sssss31r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-composite-shape/sssss31r"/>
      <lastmod>2026-11-02T00:20:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-composite-shape/sssss31r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-composite-shape/sssss31r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-composite-shape/sssss31r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-composite-shape/sssss31r"/>
      <lastmod>2026-11-02T00:20:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisectors-exercise/sssss31h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-exercise/sssss31h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisectors-exercise/sssss31h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-exercise/sssss31h"/>
      <lastmod>2026-11-01T22:09:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisectors-exercise/sssss31h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-exercise/sssss31h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisectors-exercise/sssss31h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-exercise/sssss31h"/>
      <lastmod>2026-11-01T22:09:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/new-pythagorean-trigonometric-theorem-demo/sssss31t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-pythagorean-trigonometric-theorem-demo/sssss31t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-pythagorean-trigonometric-theorem-demo/sssss31t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-pythagorean-trigonometric-theorem-demo/sssss31t"/>
      <lastmod>2026-11-01T21:34:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/new-pythagorean-trigonometric-theorem-demo/sssss31t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-pythagorean-trigonometric-theorem-demo/sssss31t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-pythagorean-trigonometric-theorem-demo/sssss31t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-pythagorean-trigonometric-theorem-demo/sssss31t"/>
      <lastmod>2026-11-01T21:34:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/billiards-on-ellipse-1/sssss31x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/billiards-on-ellipse-1/sssss31x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/billiards-on-ellipse-1/sssss31x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/billiards-on-ellipse-1/sssss31x"/>
      <lastmod>2026-11-02T08:43:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/billiards-on-ellipse-1/sssss31x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/billiards-on-ellipse-1/sssss31x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/billiards-on-ellipse-1/sssss31x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/billiards-on-ellipse-1/sssss31x"/>
      <lastmod>2026-11-02T08:43:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-roots-by-wendy-fresh/sssss31i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-roots-by-wendy-fresh/sssss31i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-roots-by-wendy-fresh/sssss31i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-roots-by-wendy-fresh/sssss31i"/>
      <lastmod>2026-11-02T17:57:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-roots-by-wendy-fresh/sssss31i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-roots-by-wendy-fresh/sssss31i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-roots-by-wendy-fresh/sssss31i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-roots-by-wendy-fresh/sssss31i"/>
      <lastmod>2026-11-02T17:57:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-triangle-by-marko-kne-evi/sssss31o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangle-by-marko-kne-evi/sssss31o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangle-by-marko-kne-evi/sssss31o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangle-by-marko-kne-evi/sssss31o"/>
      <lastmod>2026-11-02T02:47:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-triangle-by-marko-kne-evi/sssss31o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangle-by-marko-kne-evi/sssss31o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangle-by-marko-kne-evi/sssss31o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangle-by-marko-kne-evi/sssss31o"/>
      <lastmod>2026-11-02T02:47:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simplifying-fractions-concept/sssss3ms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplifying-fractions-concept/sssss3ms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplifying-fractions-concept/sssss3ms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplifying-fractions-concept/sssss3ms"/>
      <lastmod>2026-11-02T13:46:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simplifying-fractions-concept/sssss3ms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplifying-fractions-concept/sssss3ms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplifying-fractions-concept/sssss3ms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplifying-fractions-concept/sssss3ms"/>
      <lastmod>2026-11-02T13:46:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-in-cartesian-plane/sssss3m7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-in-cartesian-plane/sssss3m7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-in-cartesian-plane/sssss3m7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-in-cartesian-plane/sssss3m7"/>
      <lastmod>2026-11-01T23:41:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-in-cartesian-plane/sssss3m7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-in-cartesian-plane/sssss3m7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-in-cartesian-plane/sssss3m7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-in-cartesian-plane/sssss3m7"/>
      <lastmod>2026-11-01T23:41:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-visualization-of-polynomial-roots-and-geometric-construction/sssss3mn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-polynomial-roots-and-geometric-construction/sssss3mn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-visualization-of-polynomial-roots-and-geometric-construction/sssss3mn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-polynomial-roots-and-geometric-construction/sssss3mn"/>
      <lastmod>2026-11-01T20:49:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-visualization-of-polynomial-roots-and-geometric-construction/sssss3mn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-polynomial-roots-and-geometric-construction/sssss3mn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-visualization-of-polynomial-roots-and-geometric-construction/sssss3mn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-polynomial-roots-and-geometric-construction/sssss3mn"/>
      <lastmod>2026-11-01T20:49:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/google-drive-logo-geometric-construction/sssss3m2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/google-drive-logo-geometric-construction/sssss3m2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/google-drive-logo-geometric-construction/sssss3m2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/google-drive-logo-geometric-construction/sssss3m2"/>
      <lastmod>2026-11-01T21:29:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/google-drive-logo-geometric-construction/sssss3m2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/google-drive-logo-geometric-construction/sssss3m2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/google-drive-logo-geometric-construction/sssss3m2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/google-drive-logo-geometric-construction/sssss3m2"/>
      <lastmod>2026-11-01T21:29:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinates-bar-chart-dilation-piecewise-functions-expected-value-demo/sssss3mk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinates-bar-chart-dilation-piecewise-functions-expected-value-demo/sssss3mk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinates-bar-chart-dilation-piecewise-functions-expected-value-demo/sssss3mk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinates-bar-chart-dilation-piecewise-functions-expected-value-demo/sssss3mk"/>
      <lastmod>2026-11-02T13:36:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinates-bar-chart-dilation-piecewise-functions-expected-value-demo/sssss3mk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinates-bar-chart-dilation-piecewise-functions-expected-value-demo/sssss3mk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinates-bar-chart-dilation-piecewise-functions-expected-value-demo/sssss3mk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinates-bar-chart-dilation-piecewise-functions-expected-value-demo/sssss3mk"/>
      <lastmod>2026-11-02T13:36:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-perimeter-calculation/sssss3mz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-perimeter-calculation/sssss3mz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-perimeter-calculation/sssss3mz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-perimeter-calculation/sssss3mz"/>
      <lastmod>2026-11-02T08:42:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-perimeter-calculation/sssss3mz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-perimeter-calculation/sssss3mz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-perimeter-calculation/sssss3mz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-perimeter-calculation/sssss3mz"/>
      <lastmod>2026-11-02T08:42:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-across-the-y-axis/sssss3m0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-across-the-y-axis/sssss3m0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-across-the-y-axis/sssss3m0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-across-the-y-axis/sssss3m0"/>
      <lastmod>2026-11-01T21:15:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-across-the-y-axis/sssss3m0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-across-the-y-axis/sssss3m0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-across-the-y-axis/sssss3m0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-across-the-y-axis/sssss3m0"/>
      <lastmod>2026-11-01T21:15:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lines-and-planes-in-vector-forms/sssss3md</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-and-planes-in-vector-forms/sssss3md"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-and-planes-in-vector-forms/sssss3md"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-and-planes-in-vector-forms/sssss3md"/>
      <lastmod>2026-11-02T18:03:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lines-and-planes-in-vector-forms/sssss3md</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-and-planes-in-vector-forms/sssss3md"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-and-planes-in-vector-forms/sssss3md"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-and-planes-in-vector-forms/sssss3md"/>
      <lastmod>2026-11-02T18:03:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivatives-and-tangents-dynamic-visualization-of-tangent-slope/sssss3mf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-and-tangents-dynamic-visualization-of-tangent-slope/sssss3mf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-and-tangents-dynamic-visualization-of-tangent-slope/sssss3mf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-and-tangents-dynamic-visualization-of-tangent-slope/sssss3mf"/>
      <lastmod>2026-11-02T18:31:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivatives-and-tangents-dynamic-visualization-of-tangent-slope/sssss3mf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-and-tangents-dynamic-visualization-of-tangent-slope/sssss3mf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-and-tangents-dynamic-visualization-of-tangent-slope/sssss3mf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-and-tangents-dynamic-visualization-of-tangent-slope/sssss3mf"/>
      <lastmod>2026-11-02T18:31:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-and-centroid-demo/sssss3m8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-centroid-demo/sssss3m8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-centroid-demo/sssss3m8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-centroid-demo/sssss3m8"/>
      <lastmod>2026-11-02T18:24:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-and-centroid-demo/sssss3m8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-centroid-demo/sssss3m8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-centroid-demo/sssss3m8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-centroid-demo/sssss3m8"/>
      <lastmod>2026-11-02T18:24:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-orthocenter-intersection-of-triangle-altitudes/sssss3mu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-orthocenter-intersection-of-triangle-altitudes/sssss3mu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-orthocenter-intersection-of-triangle-altitudes/sssss3mu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-orthocenter-intersection-of-triangle-altitudes/sssss3mu"/>
      <lastmod>2026-11-02T18:30:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-orthocenter-intersection-of-triangle-altitudes/sssss3mu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-orthocenter-intersection-of-triangle-altitudes/sssss3mu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-orthocenter-intersection-of-triangle-altitudes/sssss3mu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-orthocenter-intersection-of-triangle-altitudes/sssss3mu"/>
      <lastmod>2026-11-02T18:30:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-on-factorization-of-difference-of-squares/sssss3m5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-factorization-of-difference-of-squares/sssss3m5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-factorization-of-difference-of-squares/sssss3m5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-factorization-of-difference-of-squares/sssss3m5"/>
      <lastmod>2026-11-02T00:51:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-on-factorization-of-difference-of-squares/sssss3m5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-factorization-of-difference-of-squares/sssss3m5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-factorization-of-difference-of-squares/sssss3m5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-factorization-of-difference-of-squares/sssss3m5"/>
      <lastmod>2026-11-02T00:51:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-point-along-a-directed-line-segment/sssss3mb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-point-along-a-directed-line-segment/sssss3mb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-point-along-a-directed-line-segment/sssss3mb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-point-along-a-directed-line-segment/sssss3mb"/>
      <lastmod>2026-11-02T17:04:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-point-along-a-directed-line-segment/sssss3mb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-point-along-a-directed-line-segment/sssss3mb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-point-along-a-directed-line-segment/sssss3mb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-point-along-a-directed-line-segment/sssss3mb"/>
      <lastmod>2026-11-02T17:04:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-carla-castillo/sssss3m3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-carla-castillo/sssss3m3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-vectors-in-physics-by-carla-castillo/sssss3m3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-carla-castillo/sssss3m3"/>
      <lastmod>2026-11-01T20:47:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/application-of-vectors-in-physics-by-carla-castillo/sssss3m3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-carla-castillo/sssss3m3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-vectors-in-physics-by-carla-castillo/sssss3m3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-carla-castillo/sssss3m3"/>
      <lastmod>2026-11-01T20:47:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-and-isosceles-trapezoid-construction-and-properties/sssss3mq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-isosceles-trapezoid-construction-and-properties/sssss3mq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-isosceles-trapezoid-construction-and-properties/sssss3mq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-isosceles-trapezoid-construction-and-properties/sssss3mq"/>
      <lastmod>2026-11-02T00:21:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-and-isosceles-trapezoid-construction-and-properties/sssss3mq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-isosceles-trapezoid-construction-and-properties/sssss3mq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-isosceles-trapezoid-construction-and-properties/sssss3mq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-isosceles-trapezoid-construction-and-properties/sssss3mq"/>
      <lastmod>2026-11-02T00:21:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/radius-and-volume-of-a-circle/sssss3m1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radius-and-volume-of-a-circle/sssss3m1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radius-and-volume-of-a-circle/sssss3m1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radius-and-volume-of-a-circle/sssss3m1"/>
      <lastmod>2026-11-02T14:54:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/radius-and-volume-of-a-circle/sssss3m1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radius-and-volume-of-a-circle/sssss3m1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radius-and-volume-of-a-circle/sssss3m1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radius-and-volume-of-a-circle/sssss3m1"/>
      <lastmod>2026-11-02T14:54:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-to-show-trapezoid-area/sssss3mm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-to-show-trapezoid-area/sssss3mm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-to-show-trapezoid-area/sssss3mm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-to-show-trapezoid-area/sssss3mm"/>
      <lastmod>2026-11-02T18:59:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-to-show-trapezoid-area/sssss3mm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-to-show-trapezoid-area/sssss3mm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-to-show-trapezoid-area/sssss3mm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-to-show-trapezoid-area/sssss3mm"/>
      <lastmod>2026-11-02T18:59:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions/sssss3mj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions/sssss3mj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions/sssss3mj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions/sssss3mj"/>
      <lastmod>2026-11-02T11:58:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions/sssss3mj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions/sssss3mj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions/sssss3mj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions/sssss3mj"/>
      <lastmod>2026-11-02T11:58:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-in-a-square/sssss3mp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-in-a-square/sssss3mp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-in-a-square/sssss3mp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-in-a-square/sssss3mp"/>
      <lastmod>2026-11-02T12:23:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-in-a-square/sssss3mp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-in-a-square/sssss3mp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-in-a-square/sssss3mp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-in-a-square/sssss3mp"/>
      <lastmod>2026-11-02T12:23:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-pyramids-method-1-by-bed-prasad-dhakal/sssss3mw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-pyramids-method-1-by-bed-prasad-dhakal/sssss3mw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-pyramids-method-1-by-bed-prasad-dhakal/sssss3mw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-pyramids-method-1-by-bed-prasad-dhakal/sssss3mw"/>
      <lastmod>2026-11-01T21:06:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-pyramids-method-1-by-bed-prasad-dhakal/sssss3mw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-pyramids-method-1-by-bed-prasad-dhakal/sssss3mw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-pyramids-method-1-by-bed-prasad-dhakal/sssss3mw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-pyramids-method-1-by-bed-prasad-dhakal/sssss3mw"/>
      <lastmod>2026-11-01T21:06:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagonal-prism-by-helen-bates/sssss3m6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-prism-by-helen-bates/sssss3m6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-prism-by-helen-bates/sssss3m6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-prism-by-helen-bates/sssss3m6"/>
      <lastmod>2026-11-02T03:16:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagonal-prism-by-helen-bates/sssss3m6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-prism-by-helen-bates/sssss3m6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-prism-by-helen-bates/sssss3m6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-prism-by-helen-bates/sssss3m6"/>
      <lastmod>2026-11-02T03:16:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/friday-mosque-isfahan-northwest-iwan-parts/sssss3mg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/friday-mosque-isfahan-northwest-iwan-parts/sssss3mg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/friday-mosque-isfahan-northwest-iwan-parts/sssss3mg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/friday-mosque-isfahan-northwest-iwan-parts/sssss3mg"/>
      <lastmod>2026-11-01T20:48:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/friday-mosque-isfahan-northwest-iwan-parts/sssss3mg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/friday-mosque-isfahan-northwest-iwan-parts/sssss3mg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/friday-mosque-isfahan-northwest-iwan-parts/sssss3mg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/friday-mosque-isfahan-northwest-iwan-parts/sssss3mg"/>
      <lastmod>2026-11-01T20:48:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/twelve-rhombuses-in-a-cube/sssss3m9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/twelve-rhombuses-in-a-cube/sssss3m9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/twelve-rhombuses-in-a-cube/sssss3m9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/twelve-rhombuses-in-a-cube/sssss3m9"/>
      <lastmod>2026-11-01T23:18:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/twelve-rhombuses-in-a-cube/sssss3m9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/twelve-rhombuses-in-a-cube/sssss3m9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/twelve-rhombuses-in-a-cube/sssss3m9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/twelve-rhombuses-in-a-cube/sssss3m9"/>
      <lastmod>2026-11-01T23:18:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curve-stitching-point-map-modular-and-gcd-driven-geometric-patterns/sssss3me</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching-point-map-modular-and-gcd-driven-geometric-patterns/sssss3me"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-point-map-modular-and-gcd-driven-geometric-patterns/sssss3me"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching-point-map-modular-and-gcd-driven-geometric-patterns/sssss3me"/>
      <lastmod>2026-11-02T15:13:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curve-stitching-point-map-modular-and-gcd-driven-geometric-patterns/sssss3me</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching-point-map-modular-and-gcd-driven-geometric-patterns/sssss3me"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-point-map-modular-and-gcd-driven-geometric-patterns/sssss3me"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching-point-map-modular-and-gcd-driven-geometric-patterns/sssss3me"/>
      <lastmod>2026-11-02T15:13:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-and-continuity-exercise-7-4-1/sssss3mv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-and-continuity-exercise-7-4-1/sssss3mv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-and-continuity-exercise-7-4-1/sssss3mv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-and-continuity-exercise-7-4-1/sssss3mv"/>
      <lastmod>2026-11-01T23:52:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-and-continuity-exercise-7-4-1/sssss3mv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-and-continuity-exercise-7-4-1/sssss3mv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-and-continuity-exercise-7-4-1/sssss3mv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-and-continuity-exercise-7-4-1/sssss3mv"/>
      <lastmod>2026-11-01T23:52:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/approximating-area-using-the-trapezium-rule/sssss3m4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-area-using-the-trapezium-rule/sssss3m4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-area-using-the-trapezium-rule/sssss3m4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-area-using-the-trapezium-rule/sssss3m4"/>
      <lastmod>2026-11-02T16:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/approximating-area-using-the-trapezium-rule/sssss3m4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-area-using-the-trapezium-rule/sssss3m4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-area-using-the-trapezium-rule/sssss3m4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-area-using-the-trapezium-rule/sssss3m4"/>
      <lastmod>2026-11-02T16:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simplifying-rational-expressions-and-stating-restrictions/sssss3ml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplifying-rational-expressions-and-stating-restrictions/sssss3ml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplifying-rational-expressions-and-stating-restrictions/sssss3ml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplifying-rational-expressions-and-stating-restrictions/sssss3ml"/>
      <lastmod>2026-11-01T20:52:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simplifying-rational-expressions-and-stating-restrictions/sssss3ml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplifying-rational-expressions-and-stating-restrictions/sssss3ml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplifying-rational-expressions-and-stating-restrictions/sssss3ml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplifying-rational-expressions-and-stating-restrictions/sssss3ml"/>
      <lastmod>2026-11-01T20:52:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/extremely-high-powers-by-timur-kapitsa/sssss3my</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/extremely-high-powers-by-timur-kapitsa/sssss3my"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/extremely-high-powers-by-timur-kapitsa/sssss3my"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/extremely-high-powers-by-timur-kapitsa/sssss3my"/>
      <lastmod>2026-11-01T21:54:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/extremely-high-powers-by-timur-kapitsa/sssss3my</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/extremely-high-powers-by-timur-kapitsa/sssss3my"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/extremely-high-powers-by-timur-kapitsa/sssss3my"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/extremely-high-powers-by-timur-kapitsa/sssss3my"/>
      <lastmod>2026-11-01T21:54:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/five-point-sphere/sssss3ma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/five-point-sphere/sssss3ma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/five-point-sphere/sssss3ma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/five-point-sphere/sssss3ma"/>
      <lastmod>2026-11-01T21:53:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/five-point-sphere/sssss3ma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/five-point-sphere/sssss3ma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/five-point-sphere/sssss3ma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/five-point-sphere/sssss3ma"/>
      <lastmod>2026-11-01T21:53:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-cube-construction/sssss3mc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-cube-construction/sssss3mc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-cube-construction/sssss3mc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-cube-construction/sssss3mc"/>
      <lastmod>2026-11-01T20:52:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-cube-construction/sssss3mc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-cube-construction/sssss3mc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-cube-construction/sssss3mc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-cube-construction/sssss3mc"/>
      <lastmod>2026-11-01T20:52:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-axis-with-snapping/sssss3mr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-axis-with-snapping/sssss3mr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-axis-with-snapping/sssss3mr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-axis-with-snapping/sssss3mr"/>
      <lastmod>2026-11-02T09:32:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-axis-with-snapping/sssss3mr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-axis-with-snapping/sssss3mr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-axis-with-snapping/sssss3mr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-axis-with-snapping/sssss3mr"/>
      <lastmod>2026-11-02T09:32:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tape-diagrams-for-algebra-with-examples-by-kapil123-2/sssss3mh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-diagrams-for-algebra-with-examples-by-kapil123-2/sssss3mh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-diagrams-for-algebra-with-examples-by-kapil123-2/sssss3mh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-diagrams-for-algebra-with-examples-by-kapil123-2/sssss3mh"/>
      <lastmod>2026-11-01T20:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tape-diagrams-for-algebra-with-examples-by-kapil123-2/sssss3mh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-diagrams-for-algebra-with-examples-by-kapil123-2/sssss3mh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-diagrams-for-algebra-with-examples-by-kapil123-2/sssss3mh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-diagrams-for-algebra-with-examples-by-kapil123-2/sssss3mh"/>
      <lastmod>2026-11-01T20:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/homothety-and-reflection-point/sssss3mt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/homothety-and-reflection-point/sssss3mt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/homothety-and-reflection-point/sssss3mt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/homothety-and-reflection-point/sssss3mt"/>
      <lastmod>2026-11-02T16:37:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/homothety-and-reflection-point/sssss3mt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/homothety-and-reflection-point/sssss3mt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/homothety-and-reflection-point/sssss3mt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/homothety-and-reflection-point/sssss3mt"/>
      <lastmod>2026-11-02T16:37:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similarity-transformation-line-segment-dilation/sssss3mx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-line-segment-dilation/sssss3mx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-line-segment-dilation/sssss3mx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-line-segment-dilation/sssss3mx"/>
      <lastmod>2026-11-01T21:21:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similarity-transformation-line-segment-dilation/sssss3mx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-line-segment-dilation/sssss3mx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-line-segment-dilation/sssss3mx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-line-segment-dilation/sssss3mx"/>
      <lastmod>2026-11-01T21:21:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rainbow-conics-as-envelopes-of-straight-lines/sssss3mi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-conics-as-envelopes-of-straight-lines/sssss3mi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-conics-as-envelopes-of-straight-lines/sssss3mi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-conics-as-envelopes-of-straight-lines/sssss3mi"/>
      <lastmod>2026-11-01T21:38:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rainbow-conics-as-envelopes-of-straight-lines/sssss3mi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-conics-as-envelopes-of-straight-lines/sssss3mi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-conics-as-envelopes-of-straight-lines/sssss3mi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-conics-as-envelopes-of-straight-lines/sssss3mi"/>
      <lastmod>2026-11-01T21:38:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-leah-mcconnell/sssss3mo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-leah-mcconnell/sssss3mo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-hexagonal-prism-by-leah-mcconnell/sssss3mo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-leah-mcconnell/sssss3mo"/>
      <lastmod>2026-11-01T20:55:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-hexagonal-prism-by-leah-mcconnell/sssss3mo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-leah-mcconnell/sssss3mo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-hexagonal-prism-by-leah-mcconnell/sssss3mo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-leah-mcconnell/sssss3mo"/>
      <lastmod>2026-11-01T20:55:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-planes-demo/sssss3js</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-planes-demo/sssss3js"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-planes-demo/sssss3js"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-planes-demo/sssss3js"/>
      <lastmod>2026-11-02T09:06:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-planes-demo/sssss3js</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-planes-demo/sssss3js"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-planes-demo/sssss3js"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-planes-demo/sssss3js"/>
      <lastmod>2026-11-02T09:06:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/combine-like-terms/sssss3j7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combine-like-terms/sssss3j7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combine-like-terms/sssss3j7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combine-like-terms/sssss3j7"/>
      <lastmod>2026-11-02T17:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/combine-like-terms/sssss3j7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combine-like-terms/sssss3j7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combine-like-terms/sssss3j7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combine-like-terms/sssss3j7"/>
      <lastmod>2026-11-02T17:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-in-standard-form-for-payment-options/sssss3jn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-in-standard-form-for-payment-options/sssss3jn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-in-standard-form-for-payment-options/sssss3jn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-in-standard-form-for-payment-options/sssss3jn"/>
      <lastmod>2026-11-02T16:43:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-in-standard-form-for-payment-options/sssss3jn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-in-standard-form-for-payment-options/sssss3jn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-in-standard-form-for-payment-options/sssss3jn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-in-standard-form-for-payment-options/sssss3jn"/>
      <lastmod>2026-11-02T16:43:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/enlargement-with-negative-and-fractional-scale-factors/sssss3j2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/enlargement-with-negative-and-fractional-scale-factors/sssss3j2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/enlargement-with-negative-and-fractional-scale-factors/sssss3j2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/enlargement-with-negative-and-fractional-scale-factors/sssss3j2"/>
      <lastmod>2026-11-02T03:19:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/enlargement-with-negative-and-fractional-scale-factors/sssss3j2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/enlargement-with-negative-and-fractional-scale-factors/sssss3j2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/enlargement-with-negative-and-fractional-scale-factors/sssss3j2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/enlargement-with-negative-and-fractional-scale-factors/sssss3j2"/>
      <lastmod>2026-11-02T03:19:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-correlation-the-least-square-line-of-best-fit/sssss3jk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-correlation-the-least-square-line-of-best-fit/sssss3jk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-correlation-the-least-square-line-of-best-fit/sssss3jk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-correlation-the-least-square-line-of-best-fit/sssss3jk"/>
      <lastmod>2026-11-01T19:14:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-correlation-the-least-square-line-of-best-fit/sssss3jk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-correlation-the-least-square-line-of-best-fit/sssss3jk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-correlation-the-least-square-line-of-best-fit/sssss3jk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-correlation-the-least-square-line-of-best-fit/sssss3jk"/>
      <lastmod>2026-11-01T19:14:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/improper-integrals-of-power-functions/sssss3jz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/improper-integrals-of-power-functions/sssss3jz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/improper-integrals-of-power-functions/sssss3jz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/improper-integrals-of-power-functions/sssss3jz"/>
      <lastmod>2026-11-01T23:45:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/improper-integrals-of-power-functions/sssss3jz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/improper-integrals-of-power-functions/sssss3jz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/improper-integrals-of-power-functions/sssss3jz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/improper-integrals-of-power-functions/sssss3jz"/>
      <lastmod>2026-11-01T23:45:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-volume-of-solids-of-revolution-about-x-axis/sssss3j0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volume-of-solids-of-revolution-about-x-axis/sssss3j0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volume-of-solids-of-revolution-about-x-axis/sssss3j0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volume-of-solids-of-revolution-about-x-axis/sssss3j0"/>
      <lastmod>2026-11-02T18:43:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-volume-of-solids-of-revolution-about-x-axis/sssss3j0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volume-of-solids-of-revolution-about-x-axis/sssss3j0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volume-of-solids-of-revolution-about-x-axis/sssss3j0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volume-of-solids-of-revolution-about-x-axis/sssss3j0"/>
      <lastmod>2026-11-02T18:43:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equations-for-functions-practice/sssss3jd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equations-for-functions-practice/sssss3jd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equations-for-functions-practice/sssss3jd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equations-for-functions-practice/sssss3jd"/>
      <lastmod>2026-11-02T02:04:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equations-for-functions-practice/sssss3jd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equations-for-functions-practice/sssss3jd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equations-for-functions-practice/sssss3jd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equations-for-functions-practice/sssss3jd"/>
      <lastmod>2026-11-02T02:04:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-polygons-in-the-coordinate-plane/sssss3jf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-polygons-in-the-coordinate-plane/sssss3jf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-polygons-in-the-coordinate-plane/sssss3jf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-polygons-in-the-coordinate-plane/sssss3jf"/>
      <lastmod>2026-11-02T18:47:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-polygons-in-the-coordinate-plane/sssss3jf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-polygons-in-the-coordinate-plane/sssss3jf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-polygons-in-the-coordinate-plane/sssss3jf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-polygons-in-the-coordinate-plane/sssss3jf"/>
      <lastmod>2026-11-02T18:47:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-sum/sssss3j8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-sum/sssss3j8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-sum/sssss3j8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-sum/sssss3j8"/>
      <lastmod>2026-11-02T03:20:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-sum/sssss3j8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-sum/sssss3j8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-sum/sssss3j8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-sum/sssss3j8"/>
      <lastmod>2026-11-02T03:20:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-poisson-distribution-demo/sssss3ju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-poisson-distribution-demo/sssss3ju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-poisson-distribution-demo/sssss3ju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-poisson-distribution-demo/sssss3ju"/>
      <lastmod>2026-11-02T02:53:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-poisson-distribution-demo/sssss3ju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-poisson-distribution-demo/sssss3ju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-poisson-distribution-demo/sssss3ju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-poisson-distribution-demo/sssss3ju"/>
      <lastmod>2026-11-02T02:53:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-sector-example/sssss3j5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-sector-example/sssss3j5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-sector-example/sssss3j5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-sector-example/sssss3j5"/>
      <lastmod>2026-11-01T21:44:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-sector-example/sssss3j5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-sector-example/sssss3j5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-sector-example/sssss3j5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-sector-example/sssss3j5"/>
      <lastmod>2026-11-01T21:44:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/borromean-rings/sssss3jb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/borromean-rings/sssss3jb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/borromean-rings/sssss3jb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/borromean-rings/sssss3jb"/>
      <lastmod>2026-11-01T21:22:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/borromean-rings/sssss3jb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/borromean-rings/sssss3jb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/borromean-rings/sssss3jb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/borromean-rings/sssss3jb"/>
      <lastmod>2026-11-01T21:22:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sas-similarity-theorem-exploration-sssss5sp/sssss3j3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-similarity-theorem-exploration-sssss5sp/sssss3j3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-similarity-theorem-exploration-sssss5sp/sssss3j3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-similarity-theorem-exploration-sssss5sp/sssss3j3"/>
      <lastmod>2026-11-01T20:52:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sas-similarity-theorem-exploration-sssss5sp/sssss3j3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-similarity-theorem-exploration-sssss5sp/sssss3j3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-similarity-theorem-exploration-sssss5sp/sssss3j3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-similarity-theorem-exploration-sssss5sp/sssss3j3"/>
      <lastmod>2026-11-01T20:52:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-cube-by-roman-chijner/sssss3jq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-cube-by-roman-chijner/sssss3jq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-cube-by-roman-chijner/sssss3jq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-cube-by-roman-chijner/sssss3jq"/>
      <lastmod>2026-11-01T21:03:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-cube-by-roman-chijner/sssss3jq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-cube-by-roman-chijner/sssss3jq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-cube-by-roman-chijner/sssss3jq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-cube-by-roman-chijner/sssss3jq"/>
      <lastmod>2026-11-01T21:03:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-by-keith-hatfield/sssss3j1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-keith-hatfield/sssss3j1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-by-keith-hatfield/sssss3j1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-keith-hatfield/sssss3j1"/>
      <lastmod>2026-11-01T20:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-by-keith-hatfield/sssss3j1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-keith-hatfield/sssss3j1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-by-keith-hatfield/sssss3j1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-keith-hatfield/sssss3j1"/>
      <lastmod>2026-11-01T20:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/price-elasticity-of-demand/sssss3jm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/price-elasticity-of-demand/sssss3jm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/price-elasticity-of-demand/sssss3jm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/price-elasticity-of-demand/sssss3jm"/>
      <lastmod>2026-11-01T23:40:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/price-elasticity-of-demand/sssss3jm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/price-elasticity-of-demand/sssss3jm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/price-elasticity-of-demand/sssss3jm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/price-elasticity-of-demand/sssss3jm"/>
      <lastmod>2026-11-01T23:40:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-earth-model/sssss3jj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-earth-model/sssss3jj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-earth-model/sssss3jj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-earth-model/sssss3jj"/>
      <lastmod>2026-11-02T17:05:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-earth-model/sssss3jj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-earth-model/sssss3jj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-earth-model/sssss3jj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-earth-model/sssss3jj"/>
      <lastmod>2026-11-02T17:05:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-ratios-have-the-same-unit-rates/sssss3jp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-ratios-have-the-same-unit-rates/sssss3jp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-ratios-have-the-same-unit-rates/sssss3jp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-ratios-have-the-same-unit-rates/sssss3jp"/>
      <lastmod>2026-11-02T08:26:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-ratios-have-the-same-unit-rates/sssss3jp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-ratios-have-the-same-unit-rates/sssss3jp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-ratios-have-the-same-unit-rates/sssss3jp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-ratios-have-the-same-unit-rates/sssss3jp"/>
      <lastmod>2026-11-02T08:26:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/beehive-hexagon-surface-area-minimum/sssss3jw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/beehive-hexagon-surface-area-minimum/sssss3jw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/beehive-hexagon-surface-area-minimum/sssss3jw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/beehive-hexagon-surface-area-minimum/sssss3jw"/>
      <lastmod>2026-11-02T09:36:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/beehive-hexagon-surface-area-minimum/sssss3jw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/beehive-hexagon-surface-area-minimum/sssss3jw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/beehive-hexagon-surface-area-minimum/sssss3jw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/beehive-hexagon-surface-area-minimum/sssss3jw"/>
      <lastmod>2026-11-02T09:36:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rational-numbers-demo/sssss3j6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-numbers-demo/sssss3j6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-numbers-demo/sssss3j6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-numbers-demo/sssss3j6"/>
      <lastmod>2026-11-02T13:35:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rational-numbers-demo/sssss3j6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-numbers-demo/sssss3j6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-numbers-demo/sssss3j6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-numbers-demo/sssss3j6"/>
      <lastmod>2026-11-02T13:35:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthoptic-of-a-parabola/sssss3jg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthoptic-of-a-parabola/sssss3jg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthoptic-of-a-parabola/sssss3jg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthoptic-of-a-parabola/sssss3jg"/>
      <lastmod>2026-11-02T16:45:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthoptic-of-a-parabola/sssss3jg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthoptic-of-a-parabola/sssss3jg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthoptic-of-a-parabola/sssss3jg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthoptic-of-a-parabola/sssss3jg"/>
      <lastmod>2026-11-02T16:45:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangular-prism-anatomy-exploration/sssss3j9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangular-prism-anatomy-exploration/sssss3j9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangular-prism-anatomy-exploration/sssss3j9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangular-prism-anatomy-exploration/sssss3j9"/>
      <lastmod>2026-11-02T17:06:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangular-prism-anatomy-exploration/sssss3j9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangular-prism-anatomy-exploration/sssss3j9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangular-prism-anatomy-exploration/sssss3j9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangular-prism-anatomy-exploration/sssss3j9"/>
      <lastmod>2026-11-02T17:06:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-transformations-to-draw-polygons/sssss3je</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-transformations-to-draw-polygons/sssss3je"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-transformations-to-draw-polygons/sssss3je"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-transformations-to-draw-polygons/sssss3je"/>
      <lastmod>2026-11-02T02:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-transformations-to-draw-polygons/sssss3je</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-transformations-to-draw-polygons/sssss3je"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-transformations-to-draw-polygons/sssss3je"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-transformations-to-draw-polygons/sssss3je"/>
      <lastmod>2026-11-02T02:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolic-curves-with-straight-lines/sssss3jv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-curves-with-straight-lines/sssss3jv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-curves-with-straight-lines/sssss3jv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-curves-with-straight-lines/sssss3jv"/>
      <lastmod>2026-11-02T16:56:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabolic-curves-with-straight-lines/sssss3jv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-curves-with-straight-lines/sssss3jv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-curves-with-straight-lines/sssss3jv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-curves-with-straight-lines/sssss3jv"/>
      <lastmod>2026-11-02T16:56:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-of-solids-disk-washer-method/sssss3j4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-solids-disk-washer-method/sssss3j4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-solids-disk-washer-method/sssss3j4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-solids-disk-washer-method/sssss3j4"/>
      <lastmod>2026-11-02T02:13:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-of-solids-disk-washer-method/sssss3j4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-solids-disk-washer-method/sssss3j4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-solids-disk-washer-method/sssss3j4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-solids-disk-washer-method/sssss3j4"/>
      <lastmod>2026-11-02T02:13:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-sphere-and-the-pythagorean-theorem/sssss3jl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-sphere-and-the-pythagorean-theorem/sssss3jl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-sphere-and-the-pythagorean-theorem/sssss3jl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-sphere-and-the-pythagorean-theorem/sssss3jl"/>
      <lastmod>2026-11-02T17:37:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-sphere-and-the-pythagorean-theorem/sssss3jl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-sphere-and-the-pythagorean-theorem/sssss3jl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-sphere-and-the-pythagorean-theorem/sssss3jl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-sphere-and-the-pythagorean-theorem/sssss3jl"/>
      <lastmod>2026-11-02T17:37:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-continuous-and-periodic-compounding-interest/sssss3jy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-continuous-and-periodic-compounding-interest/sssss3jy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-continuous-and-periodic-compounding-interest/sssss3jy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-continuous-and-periodic-compounding-interest/sssss3jy"/>
      <lastmod>2026-11-01T21:42:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-continuous-and-periodic-compounding-interest/sssss3jy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-continuous-and-periodic-compounding-interest/sssss3jy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-continuous-and-periodic-compounding-interest/sssss3jy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-continuous-and-periodic-compounding-interest/sssss3jy"/>
      <lastmod>2026-11-01T21:42:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-linear-transformations-and-determinant-visualization/sssss3ja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-linear-transformations-and-determinant-visualization/sssss3ja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-linear-transformations-and-determinant-visualization/sssss3ja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-linear-transformations-and-determinant-visualization/sssss3ja"/>
      <lastmod>2026-11-01T23:33:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-linear-transformations-and-determinant-visualization/sssss3ja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-linear-transformations-and-determinant-visualization/sssss3ja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-linear-transformations-and-determinant-visualization/sssss3ja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-linear-transformations-and-determinant-visualization/sssss3ja"/>
      <lastmod>2026-11-01T23:33:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tessellation-of-the-plane-based-on-napoleon-s-theorem/sssss3jc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tessellation-of-the-plane-based-on-napoleon-s-theorem/sssss3jc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tessellation-of-the-plane-based-on-napoleon-s-theorem/sssss3jc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tessellation-of-the-plane-based-on-napoleon-s-theorem/sssss3jc"/>
      <lastmod>2026-11-01T19:05:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tessellation-of-the-plane-based-on-napoleon-s-theorem/sssss3jc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tessellation-of-the-plane-based-on-napoleon-s-theorem/sssss3jc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tessellation-of-the-plane-based-on-napoleon-s-theorem/sssss3jc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tessellation-of-the-plane-based-on-napoleon-s-theorem/sssss3jc"/>
      <lastmod>2026-11-01T19:05:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dual-parallel-number-lines-demonstration/sssss3jr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dual-parallel-number-lines-demonstration/sssss3jr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dual-parallel-number-lines-demonstration/sssss3jr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dual-parallel-number-lines-demonstration/sssss3jr"/>
      <lastmod>2026-11-02T15:46:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dual-parallel-number-lines-demonstration/sssss3jr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dual-parallel-number-lines-demonstration/sssss3jr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dual-parallel-number-lines-demonstration/sssss3jr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dual-parallel-number-lines-demonstration/sssss3jr"/>
      <lastmod>2026-11-02T15:46:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-205/sssss3jh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-205/sssss3jh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-205/sssss3jh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-205/sssss3jh"/>
      <lastmod>2026-11-02T18:22:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-205/sssss3jh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-205/sssss3jh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-205/sssss3jh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-205/sssss3jh"/>
      <lastmod>2026-11-02T18:22:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-root-function-y-a-f-x-example/sssss3jt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-function-y-a-f-x-example/sssss3jt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-function-y-a-f-x-example/sssss3jt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-function-y-a-f-x-example/sssss3jt"/>
      <lastmod>2026-11-02T10:53:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-root-function-y-a-f-x-example/sssss3jt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-function-y-a-f-x-example/sssss3jt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-function-y-a-f-x-example/sssss3jt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-function-y-a-f-x-example/sssss3jt"/>
      <lastmod>2026-11-02T10:53:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-prism-and-square-pyramid-net/sssss3jx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-and-square-pyramid-net/sssss3jx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-and-square-pyramid-net/sssss3jx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-and-square-pyramid-net/sssss3jx"/>
      <lastmod>2026-11-01T21:32:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-prism-and-square-pyramid-net/sssss3jx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-and-square-pyramid-net/sssss3jx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-and-square-pyramid-net/sssss3jx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-and-square-pyramid-net/sssss3jx"/>
      <lastmod>2026-11-01T21:32:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-solid-of-revolution-shell-method/sssss3ji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-solid-of-revolution-shell-method/sssss3ji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-solid-of-revolution-shell-method/sssss3ji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-solid-of-revolution-shell-method/sssss3ji"/>
      <lastmod>2026-11-01T19:24:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-solid-of-revolution-shell-method/sssss3ji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-solid-of-revolution-shell-method/sssss3ji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-solid-of-revolution-shell-method/sssss3ji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-solid-of-revolution-shell-method/sssss3ji"/>
      <lastmod>2026-11-01T19:24:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-construction-by-taylor/sssss3jo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-construction-by-taylor/sssss3jo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-construction-by-taylor/sssss3jo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-construction-by-taylor/sssss3jo"/>
      <lastmod>2026-11-02T18:53:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-construction-by-taylor/sssss3jo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-construction-by-taylor/sssss3jo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-construction-by-taylor/sssss3jo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-construction-by-taylor/sssss3jo"/>
      <lastmod>2026-11-02T18:53:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-percentage-and-coefficient/sssss3ps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-percentage-and-coefficient/sssss3ps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-percentage-and-coefficient/sssss3ps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-percentage-and-coefficient/sssss3ps"/>
      <lastmod>2026-11-01T19:08:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-percentage-and-coefficient/sssss3ps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-percentage-and-coefficient/sssss3ps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-percentage-and-coefficient/sssss3ps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-percentage-and-coefficient/sssss3ps"/>
      <lastmod>2026-11-01T19:08:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-tangents-cool-property/sssss3p7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-tangents-cool-property/sssss3p7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-tangents-cool-property/sssss3p7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-tangents-cool-property/sssss3p7"/>
      <lastmod>2026-11-01T21:18:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-tangents-cool-property/sssss3p7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-tangents-cool-property/sssss3p7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-tangents-cool-property/sssss3p7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-tangents-cool-property/sssss3p7"/>
      <lastmod>2026-11-01T21:18:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-equations/sssss3pn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations/sssss3pn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations/sssss3pn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations/sssss3pn"/>
      <lastmod>2026-11-01T19:14:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-equations/sssss3pn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations/sssss3pn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations/sssss3pn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations/sssss3pn"/>
      <lastmod>2026-11-01T19:14:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-of-a-dilation/sssss3p2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-of-a-dilation/sssss3p2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-of-a-dilation/sssss3p2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-of-a-dilation/sssss3p2"/>
      <lastmod>2026-11-01T23:46:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-of-a-dilation/sssss3p2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-of-a-dilation/sssss3p2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-of-a-dilation/sssss3p2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-of-a-dilation/sssss3p2"/>
      <lastmod>2026-11-01T23:46:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-basic-exponential-functions/sssss3pk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-basic-exponential-functions/sssss3pk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-basic-exponential-functions/sssss3pk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-basic-exponential-functions/sssss3pk"/>
      <lastmod>2026-11-02T02:57:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-basic-exponential-functions/sssss3pk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-basic-exponential-functions/sssss3pk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-basic-exponential-functions/sssss3pk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-basic-exponential-functions/sssss3pk"/>
      <lastmod>2026-11-02T02:57:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pv-and-ts-diagrams/sssss3pz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pv-and-ts-diagrams/sssss3pz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pv-and-ts-diagrams/sssss3pz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pv-and-ts-diagrams/sssss3pz"/>
      <lastmod>2026-11-01T23:11:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pv-and-ts-diagrams/sssss3pz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pv-and-ts-diagrams/sssss3pz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pv-and-ts-diagrams/sssss3pz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pv-and-ts-diagrams/sssss3pz"/>
      <lastmod>2026-11-01T23:11:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p2mm-geometric-construction-demo/sssss3p0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p2mm-geometric-construction-demo/sssss3p0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p2mm-geometric-construction-demo/sssss3p0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p2mm-geometric-construction-demo/sssss3p0"/>
      <lastmod>2026-11-02T16:51:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p2mm-geometric-construction-demo/sssss3p0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p2mm-geometric-construction-demo/sssss3p0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p2mm-geometric-construction-demo/sssss3p0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p2mm-geometric-construction-demo/sssss3p0"/>
      <lastmod>2026-11-02T16:51:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cylinder-construction-by-a-barousse/sssss3pd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder-construction-by-a-barousse/sssss3pd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder-construction-by-a-barousse/sssss3pd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder-construction-by-a-barousse/sssss3pd"/>
      <lastmod>2026-11-02T18:10:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cylinder-construction-by-a-barousse/sssss3pd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder-construction-by-a-barousse/sssss3pd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder-construction-by-a-barousse/sssss3pd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder-construction-by-a-barousse/sssss3pd"/>
      <lastmod>2026-11-02T18:10:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-malin-christersson/sssss3pf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-malin-christersson/sssss3pf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-demo-by-malin-christersson/sssss3pf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-malin-christersson/sssss3pf"/>
      <lastmod>2026-11-01T23:39:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-demo-by-malin-christersson/sssss3pf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-malin-christersson/sssss3pf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-demo-by-malin-christersson/sssss3pf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-malin-christersson/sssss3pf"/>
      <lastmod>2026-11-01T23:39:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/q3-math-example-by-anthony-or/sssss3p8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/q3-math-example-by-anthony-or/sssss3p8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/q3-math-example-by-anthony-or/sssss3p8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/q3-math-example-by-anthony-or/sssss3p8"/>
      <lastmod>2026-11-02T16:43:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/q3-math-example-by-anthony-or/sssss3p8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/q3-math-example-by-anthony-or/sssss3p8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/q3-math-example-by-anthony-or/sssss3p8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/q3-math-example-by-anthony-or/sssss3p8"/>
      <lastmod>2026-11-02T16:43:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-by-steve-phelps/sssss3pu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-by-steve-phelps/sssss3pu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-proof-without-words-by-steve-phelps/sssss3pu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-by-steve-phelps/sssss3pu"/>
      <lastmod>2026-11-01T21:45:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-proof-without-words-by-steve-phelps/sssss3pu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-by-steve-phelps/sssss3pu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-proof-without-words-by-steve-phelps/sssss3pu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-by-steve-phelps/sssss3pu"/>
      <lastmod>2026-11-01T21:45:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-super-formula/sssss3p5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-super-formula/sssss3p5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-super-formula/sssss3p5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-super-formula/sssss3p5"/>
      <lastmod>2026-11-02T16:30:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-super-formula/sssss3p5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-super-formula/sssss3p5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-super-formula/sssss3p5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-super-formula/sssss3p5"/>
      <lastmod>2026-11-02T16:30:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-that-do-not-exist-at-origin/sssss3pb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-that-do-not-exist-at-origin/sssss3pb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-that-do-not-exist-at-origin/sssss3pb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-that-do-not-exist-at-origin/sssss3pb"/>
      <lastmod>2026-11-02T18:13:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-that-do-not-exist-at-origin/sssss3pb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-that-do-not-exist-at-origin/sssss3pb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-that-do-not-exist-at-origin/sssss3pb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-that-do-not-exist-at-origin/sssss3pb"/>
      <lastmod>2026-11-02T18:13:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/opposite-power-function-with-even-negative-exponent/sssss3p3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/opposite-power-function-with-even-negative-exponent/sssss3p3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/opposite-power-function-with-even-negative-exponent/sssss3p3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/opposite-power-function-with-even-negative-exponent/sssss3p3"/>
      <lastmod>2026-11-02T12:09:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/opposite-power-function-with-even-negative-exponent/sssss3p3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/opposite-power-function-with-even-negative-exponent/sssss3p3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/opposite-power-function-with-even-negative-exponent/sssss3p3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/opposite-power-function-with-even-negative-exponent/sssss3p3"/>
      <lastmod>2026-11-02T12:09:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangents-on-an-ellipse-and-their-orthocenter-properties/sssss3pq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangents-on-an-ellipse-and-their-orthocenter-properties/sssss3pq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangents-on-an-ellipse-and-their-orthocenter-properties/sssss3pq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangents-on-an-ellipse-and-their-orthocenter-properties/sssss3pq"/>
      <lastmod>2026-11-02T02:50:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangents-on-an-ellipse-and-their-orthocenter-properties/sssss3pq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangents-on-an-ellipse-and-their-orthocenter-properties/sssss3pq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangents-on-an-ellipse-and-their-orthocenter-properties/sssss3pq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangents-on-an-ellipse-and-their-orthocenter-properties/sssss3pq"/>
      <lastmod>2026-11-02T02:50:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-exploration-by-alfonso-garcia/sssss3p1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-alfonso-garcia/sssss3p1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exploration-by-alfonso-garcia/sssss3p1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-alfonso-garcia/sssss3p1"/>
      <lastmod>2026-11-02T16:42:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-exploration-by-alfonso-garcia/sssss3p1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-alfonso-garcia/sssss3p1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exploration-by-alfonso-garcia/sssss3p1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-alfonso-garcia/sssss3p1"/>
      <lastmod>2026-11-02T16:42:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-action-dynamic-discovery/sssss3pm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-action-dynamic-discovery/sssss3pm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-action-dynamic-discovery/sssss3pm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-action-dynamic-discovery/sssss3pm"/>
      <lastmod>2026-11-01T21:45:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-action-dynamic-discovery/sssss3pm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-action-dynamic-discovery/sssss3pm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-action-dynamic-discovery/sssss3pm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-action-dynamic-discovery/sssss3pm"/>
      <lastmod>2026-11-01T21:45:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-of-revolution-vase-example/sssss3pj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-vase-example/sssss3pj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution-vase-example/sssss3pj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-vase-example/sssss3pj"/>
      <lastmod>2026-11-02T08:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-of-revolution-vase-example/sssss3pj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-vase-example/sssss3pj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution-vase-example/sssss3pj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-vase-example/sssss3pj"/>
      <lastmod>2026-11-02T08:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-construction-by-clary-miles/sssss3pp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-construction-by-clary-miles/sssss3pp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-construction-by-clary-miles/sssss3pp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-construction-by-clary-miles/sssss3pp"/>
      <lastmod>2026-11-01T19:25:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-construction-by-clary-miles/sssss3pp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-construction-by-clary-miles/sssss3pp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-construction-by-clary-miles/sssss3pp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-construction-by-clary-miles/sssss3pp"/>
      <lastmod>2026-11-01T19:25:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-between-two-ellipses/sssss3pw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-between-two-ellipses/sssss3pw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-between-two-ellipses/sssss3pw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-between-two-ellipses/sssss3pw"/>
      <lastmod>2026-11-01T23:26:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-between-two-ellipses/sssss3pw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-between-two-ellipses/sssss3pw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-between-two-ellipses/sssss3pw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-between-two-ellipses/sssss3pw"/>
      <lastmod>2026-11-01T23:26:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-and-geometric-transformations/sssss3p6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-and-geometric-transformations/sssss3p6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-and-geometric-transformations/sssss3p6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-and-geometric-transformations/sssss3p6"/>
      <lastmod>2026-11-02T17:54:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-and-geometric-transformations/sssss3p6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-and-geometric-transformations/sssss3p6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-and-geometric-transformations/sssss3p6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-and-geometric-transformations/sssss3p6"/>
      <lastmod>2026-11-02T17:54:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone-animated/sssss3pg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-animated/sssss3pg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-animated/sssss3pg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-animated/sssss3pg"/>
      <lastmod>2026-11-02T00:14:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cone-animated/sssss3pg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-animated/sssss3pg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-animated/sssss3pg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-animated/sssss3pg"/>
      <lastmod>2026-11-02T00:14:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/elliptical-orbit-model/sssss3p9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptical-orbit-model/sssss3p9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptical-orbit-model/sssss3p9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptical-orbit-model/sssss3p9"/>
      <lastmod>2026-11-01T23:48:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/elliptical-orbit-model/sssss3p9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptical-orbit-model/sssss3p9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptical-orbit-model/sssss3p9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptical-orbit-model/sssss3p9"/>
      <lastmod>2026-11-01T23:48:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-subtended-by-a-chord-at-the-center/sssss3pe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-subtended-by-a-chord-at-the-center/sssss3pe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-subtended-by-a-chord-at-the-center/sssss3pe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-subtended-by-a-chord-at-the-center/sssss3pe"/>
      <lastmod>2026-11-01T21:17:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-subtended-by-a-chord-at-the-center/sssss3pe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-subtended-by-a-chord-at-the-center/sssss3pe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-subtended-by-a-chord-at-the-center/sssss3pe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-subtended-by-a-chord-at-the-center/sssss3pe"/>
      <lastmod>2026-11-01T21:17:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-solving-equations-and-modeling-situations-with-equations/sssss3pv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-solving-equations-and-modeling-situations-with-equations/sssss3pv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-solving-equations-and-modeling-situations-with-equations/sssss3pv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-solving-equations-and-modeling-situations-with-equations/sssss3pv"/>
      <lastmod>2026-11-02T10:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-solving-equations-and-modeling-situations-with-equations/sssss3pv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-solving-equations-and-modeling-situations-with-equations/sssss3pv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-solving-equations-and-modeling-situations-with-equations/sssss3pv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-solving-equations-and-modeling-situations-with-equations/sssss3pv"/>
      <lastmod>2026-11-02T10:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sides-of-parallelograms/sssss3p4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sides-of-parallelograms/sssss3p4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sides-of-parallelograms/sssss3p4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sides-of-parallelograms/sssss3p4"/>
      <lastmod>2026-11-02T17:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sides-of-parallelograms/sssss3p4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sides-of-parallelograms/sssss3p4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sides-of-parallelograms/sssss3p4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sides-of-parallelograms/sssss3p4"/>
      <lastmod>2026-11-02T17:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-construction-demo/sssss3pl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-construction-demo/sssss3pl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-construction-demo/sssss3pl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-construction-demo/sssss3pl"/>
      <lastmod>2026-11-02T15:19:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-construction-demo/sssss3pl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-construction-demo/sssss3pl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-construction-demo/sssss3pl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-construction-demo/sssss3pl"/>
      <lastmod>2026-11-02T15:19:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scaled-relationships-scatter-plot-and-functions/sssss3py</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scaled-relationships-scatter-plot-and-functions/sssss3py"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scaled-relationships-scatter-plot-and-functions/sssss3py"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scaled-relationships-scatter-plot-and-functions/sssss3py"/>
      <lastmod>2026-11-01T20:35:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scaled-relationships-scatter-plot-and-functions/sssss3py</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scaled-relationships-scatter-plot-and-functions/sssss3py"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scaled-relationships-scatter-plot-and-functions/sssss3py"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scaled-relationships-scatter-plot-and-functions/sssss3py"/>
      <lastmod>2026-11-01T20:35:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-translated-cone/sssss3pa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-translated-cone/sssss3pa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-translated-cone/sssss3pa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-translated-cone/sssss3pa"/>
      <lastmod>2026-11-02T17:08:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-translated-cone/sssss3pa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-translated-cone/sssss3pa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-translated-cone/sssss3pa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-translated-cone/sssss3pa"/>
      <lastmod>2026-11-02T17:08:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-function-graphing-and-properties/sssss3pc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-graphing-and-properties/sssss3pc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-graphing-and-properties/sssss3pc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-graphing-and-properties/sssss3pc"/>
      <lastmod>2026-11-02T14:52:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-function-graphing-and-properties/sssss3pc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-graphing-and-properties/sssss3pc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-graphing-and-properties/sssss3pc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-graphing-and-properties/sssss3pc"/>
      <lastmod>2026-11-02T14:52:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-fitting/sssss3pr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-fitting/sssss3pr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-fitting/sssss3pr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-fitting/sssss3pr"/>
      <lastmod>2026-11-01T23:39:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-fitting/sssss3pr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-fitting/sssss3pr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-fitting/sssss3pr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-fitting/sssss3pr"/>
      <lastmod>2026-11-01T23:39:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factoring-linear-expressions/sssss3ph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-linear-expressions/sssss3ph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-linear-expressions/sssss3ph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-linear-expressions/sssss3ph"/>
      <lastmod>2026-11-02T13:28:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factoring-linear-expressions/sssss3ph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-linear-expressions/sssss3ph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-linear-expressions/sssss3ph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-linear-expressions/sssss3ph"/>
      <lastmod>2026-11-02T13:28:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tape-diagrams-in-geometry/sssss3pt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-diagrams-in-geometry/sssss3pt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-diagrams-in-geometry/sssss3pt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-diagrams-in-geometry/sssss3pt"/>
      <lastmod>2026-11-02T16:32:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tape-diagrams-in-geometry/sssss3pt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-diagrams-in-geometry/sssss3pt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-diagrams-in-geometry/sssss3pt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-diagrams-in-geometry/sssss3pt"/>
      <lastmod>2026-11-02T16:32:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-disks-w-3-1/sssss3px</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-disks-w-3-1/sssss3px"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-disks-w-3-1/sssss3px"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-disks-w-3-1/sssss3px"/>
      <lastmod>2026-11-01T21:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-disks-w-3-1/sssss3px</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-disks-w-3-1/sssss3px"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-disks-w-3-1/sssss3px"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-disks-w-3-1/sssss3px"/>
      <lastmod>2026-11-01T21:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lucky-s-land-orthocenter/sssss3pi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lucky-s-land-orthocenter/sssss3pi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lucky-s-land-orthocenter/sssss3pi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lucky-s-land-orthocenter/sssss3pi"/>
      <lastmod>2026-11-02T12:41:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lucky-s-land-orthocenter/sssss3pi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lucky-s-land-orthocenter/sssss3pi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lucky-s-land-orthocenter/sssss3pi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lucky-s-land-orthocenter/sssss3pi"/>
      <lastmod>2026-11-02T12:41:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truchet-puzzle/sssss3po</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truchet-puzzle/sssss3po"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truchet-puzzle/sssss3po"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truchet-puzzle/sssss3po"/>
      <lastmod>2026-11-01T21:56:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truchet-puzzle/sssss3po</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truchet-puzzle/sssss3po"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truchet-puzzle/sssss3po"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truchet-puzzle/sssss3po"/>
      <lastmod>2026-11-01T21:56:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-and-expected-value/sssss3ws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-and-expected-value/sssss3ws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-and-expected-value/sssss3ws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-and-expected-value/sssss3ws"/>
      <lastmod>2026-11-02T16:57:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-and-expected-value/sssss3ws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-and-expected-value/sssss3ws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-and-expected-value/sssss3ws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-and-expected-value/sssss3ws"/>
      <lastmod>2026-11-02T16:57:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-regular-11-gon/sssss3w7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-regular-11-gon/sssss3w7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-regular-11-gon/sssss3w7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-regular-11-gon/sssss3w7"/>
      <lastmod>2026-11-02T17:55:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-regular-11-gon/sssss3w7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-regular-11-gon/sssss3w7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-regular-11-gon/sssss3w7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-regular-11-gon/sssss3w7"/>
      <lastmod>2026-11-02T17:55:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-arrays-factors/sssss3wn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-arrays-factors/sssss3wn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-arrays-factors/sssss3wn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-arrays-factors/sssss3wn"/>
      <lastmod>2026-11-02T09:47:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-arrays-factors/sssss3wn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-arrays-factors/sssss3wn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-arrays-factors/sssss3wn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-arrays-factors/sssss3wn"/>
      <lastmod>2026-11-02T09:47:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/radical-function-demo/sssss3w2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radical-function-demo/sssss3w2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radical-function-demo/sssss3w2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radical-function-demo/sssss3w2"/>
      <lastmod>2026-11-02T12:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/radical-function-demo/sssss3w2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radical-function-demo/sssss3w2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radical-function-demo/sssss3w2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radical-function-demo/sssss3w2"/>
      <lastmod>2026-11-02T12:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-an-equilateral-triangle-by-geogebra-team/sssss3wk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-an-equilateral-triangle-by-geogebra-team/sssss3wk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-an-equilateral-triangle-by-geogebra-team/sssss3wk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-an-equilateral-triangle-by-geogebra-team/sssss3wk"/>
      <lastmod>2026-11-02T18:25:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-an-equilateral-triangle-by-geogebra-team/sssss3wk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-an-equilateral-triangle-by-geogebra-team/sssss3wk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-an-equilateral-triangle-by-geogebra-team/sssss3wk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-an-equilateral-triangle-by-geogebra-team/sssss3wk"/>
      <lastmod>2026-11-02T18:25:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-mathspace/sssss3wz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-mathspace/sssss3wz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-rectangles-and-squares-by-mathspace/sssss3wz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-mathspace/sssss3wz"/>
      <lastmod>2026-11-02T18:54:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-rectangles-and-squares-by-mathspace/sssss3wz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-mathspace/sssss3wz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-rectangles-and-squares-by-mathspace/sssss3wz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-mathspace/sssss3wz"/>
      <lastmod>2026-11-02T18:54:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-roots-in-spiral-vs-function/sssss3w0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-roots-in-spiral-vs-function/sssss3w0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-roots-in-spiral-vs-function/sssss3w0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-roots-in-spiral-vs-function/sssss3w0"/>
      <lastmod>2026-11-01T21:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-roots-in-spiral-vs-function/sssss3w0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-roots-in-spiral-vs-function/sssss3w0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-roots-in-spiral-vs-function/sssss3w0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-roots-in-spiral-vs-function/sssss3w0"/>
      <lastmod>2026-11-01T21:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-student-sorting-position-selection-demo/sssss3wd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-student-sorting-position-selection-demo/sssss3wd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-student-sorting-position-selection-demo/sssss3wd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-student-sorting-position-selection-demo/sssss3wd"/>
      <lastmod>2026-11-01T19:23:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-student-sorting-position-selection-demo/sssss3wd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-student-sorting-position-selection-demo/sssss3wd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-student-sorting-position-selection-demo/sssss3wd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-student-sorting-position-selection-demo/sssss3wd"/>
      <lastmod>2026-11-01T19:23:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inverse-proportion-rectangle-of-constant-width/sssss3wf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-proportion-rectangle-of-constant-width/sssss3wf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-proportion-rectangle-of-constant-width/sssss3wf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-proportion-rectangle-of-constant-width/sssss3wf"/>
      <lastmod>2026-11-01T21:08:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inverse-proportion-rectangle-of-constant-width/sssss3wf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-proportion-rectangle-of-constant-width/sssss3wf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-proportion-rectangle-of-constant-width/sssss3wf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-proportion-rectangle-of-constant-width/sssss3wf"/>
      <lastmod>2026-11-01T21:08:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-curve-plotter/sssss3w8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-curve-plotter/sssss3w8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-curve-plotter/sssss3w8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-curve-plotter/sssss3w8"/>
      <lastmod>2026-11-02T02:29:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-curve-plotter/sssss3w8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-curve-plotter/sssss3w8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-curve-plotter/sssss3w8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-curve-plotter/sssss3w8"/>
      <lastmod>2026-11-02T02:29:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p6-symmetry-ex5-two-slant-symmetrical-axes/sssss3wu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p6-symmetry-ex5-two-slant-symmetrical-axes/sssss3wu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p6-symmetry-ex5-two-slant-symmetrical-axes/sssss3wu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p6-symmetry-ex5-two-slant-symmetrical-axes/sssss3wu"/>
      <lastmod>2026-11-01T20:43:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p6-symmetry-ex5-two-slant-symmetrical-axes/sssss3wu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p6-symmetry-ex5-two-slant-symmetrical-axes/sssss3wu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p6-symmetry-ex5-two-slant-symmetrical-axes/sssss3wu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p6-symmetry-ex5-two-slant-symmetrical-axes/sssss3wu"/>
      <lastmod>2026-11-01T20:43:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/half-cylinder-geometric-construction-of-a-semi-cylinder/sssss3w5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/half-cylinder-geometric-construction-of-a-semi-cylinder/sssss3w5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/half-cylinder-geometric-construction-of-a-semi-cylinder/sssss3w5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/half-cylinder-geometric-construction-of-a-semi-cylinder/sssss3w5"/>
      <lastmod>2026-11-02T00:22:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/half-cylinder-geometric-construction-of-a-semi-cylinder/sssss3w5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/half-cylinder-geometric-construction-of-a-semi-cylinder/sssss3w5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/half-cylinder-geometric-construction-of-a-semi-cylinder/sssss3w5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/half-cylinder-geometric-construction-of-a-semi-cylinder/sssss3w5"/>
      <lastmod>2026-11-02T00:22:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-matrix-centre-of-rotation-at-c/sssss3wb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-matrix-centre-of-rotation-at-c/sssss3wb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-matrix-centre-of-rotation-at-c/sssss3wb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-matrix-centre-of-rotation-at-c/sssss3wb"/>
      <lastmod>2026-11-01T21:21:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-matrix-centre-of-rotation-at-c/sssss3wb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-matrix-centre-of-rotation-at-c/sssss3wb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-matrix-centre-of-rotation-at-c/sssss3wb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-matrix-centre-of-rotation-at-c/sssss3wb"/>
      <lastmod>2026-11-01T21:21:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimating-roots-with-tangent-function/sssss3w3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-roots-with-tangent-function/sssss3w3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-roots-with-tangent-function/sssss3w3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-roots-with-tangent-function/sssss3w3"/>
      <lastmod>2026-11-02T18:04:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimating-roots-with-tangent-function/sssss3w3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-roots-with-tangent-function/sssss3w3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-roots-with-tangent-function/sssss3w3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-roots-with-tangent-function/sssss3w3"/>
      <lastmod>2026-11-02T18:04:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-radians-and-degrees/sssss3wq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-radians-and-degrees/sssss3wq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-radians-and-degrees/sssss3wq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-radians-and-degrees/sssss3wq"/>
      <lastmod>2026-11-01T19:16:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-radians-and-degrees/sssss3wq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-radians-and-degrees/sssss3wq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-radians-and-degrees/sssss3wq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-radians-and-degrees/sssss3wq"/>
      <lastmod>2026-11-01T19:16:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rationalizing-denominators-demo/sssss3w1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rationalizing-denominators-demo/sssss3w1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rationalizing-denominators-demo/sssss3w1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rationalizing-denominators-demo/sssss3w1"/>
      <lastmod>2026-11-02T16:32:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rationalizing-denominators-demo/sssss3w1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rationalizing-denominators-demo/sssss3w1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rationalizing-denominators-demo/sssss3w1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rationalizing-denominators-demo/sssss3w1"/>
      <lastmod>2026-11-02T16:32:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-example-by-im-algebra-1-geometry-algebra-2/sssss3wm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-example-by-im-algebra-1-geometry-algebra-2/sssss3wm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-example-by-im-algebra-1-geometry-algebra-2/sssss3wm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-example-by-im-algebra-1-geometry-algebra-2/sssss3wm"/>
      <lastmod>2026-11-02T16:36:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-example-by-im-algebra-1-geometry-algebra-2/sssss3wm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-example-by-im-algebra-1-geometry-algebra-2/sssss3wm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-example-by-im-algebra-1-geometry-algebra-2/sssss3wm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-example-by-im-algebra-1-geometry-algebra-2/sssss3wm"/>
      <lastmod>2026-11-02T16:36:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-directional-derivative/sssss3wj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-directional-derivative/sssss3wj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-directional-derivative/sssss3wj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-directional-derivative/sssss3wj"/>
      <lastmod>2026-11-01T22:11:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-of-directional-derivative/sssss3wj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-directional-derivative/sssss3wj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-directional-derivative/sssss3wj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-directional-derivative/sssss3wj"/>
      <lastmod>2026-11-01T22:11:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-in-native-american-art-geometric-constructions/sssss3wp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-in-native-american-art-geometric-constructions/sssss3wp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-in-native-american-art-geometric-constructions/sssss3wp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-in-native-american-art-geometric-constructions/sssss3wp"/>
      <lastmod>2026-11-02T18:42:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-in-native-american-art-geometric-constructions/sssss3wp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-in-native-american-art-geometric-constructions/sssss3wp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-in-native-american-art-geometric-constructions/sssss3wp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-in-native-american-art-geometric-constructions/sssss3wp"/>
      <lastmod>2026-11-02T18:42:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similarity-transformations-exploration-scaling-and-length-study/sssss3ww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformations-exploration-scaling-and-length-study/sssss3ww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformations-exploration-scaling-and-length-study/sssss3ww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformations-exploration-scaling-and-length-study/sssss3ww"/>
      <lastmod>2026-11-02T16:44:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similarity-transformations-exploration-scaling-and-length-study/sssss3ww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformations-exploration-scaling-and-length-study/sssss3ww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformations-exploration-scaling-and-length-study/sssss3ww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformations-exploration-scaling-and-length-study/sssss3ww"/>
      <lastmod>2026-11-02T16:44:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-area-calculation/sssss3w6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation/sssss3w6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-calculation/sssss3w6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation/sssss3w6"/>
      <lastmod>2026-11-01T21:55:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-area-calculation/sssss3w6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation/sssss3w6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-calculation/sssss3w6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation/sssss3w6"/>
      <lastmod>2026-11-01T21:55:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-with-diagonals-6x-and-8x/sssss3wg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-with-diagonals-6x-and-8x/sssss3wg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-with-diagonals-6x-and-8x/sssss3wg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-with-diagonals-6x-and-8x/sssss3wg"/>
      <lastmod>2026-11-02T16:49:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-with-diagonals-6x-and-8x/sssss3wg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-with-diagonals-6x-and-8x/sssss3wg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-with-diagonals-6x-and-8x/sssss3wg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-with-diagonals-6x-and-8x/sssss3wg"/>
      <lastmod>2026-11-02T16:49:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-and-intersection/sssss3w9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-and-intersection/sssss3w9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-and-intersection/sssss3w9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-and-intersection/sssss3w9"/>
      <lastmod>2026-11-01T23:44:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-and-intersection/sssss3w9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-and-intersection/sssss3w9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-and-intersection/sssss3w9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-and-intersection/sssss3w9"/>
      <lastmod>2026-11-01T23:44:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-p-sum-of-n-terms/sssss3we</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-p-sum-of-n-terms/sssss3we"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-p-sum-of-n-terms/sssss3we"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-p-sum-of-n-terms/sssss3we"/>
      <lastmod>2026-11-02T15:36:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-p-sum-of-n-terms/sssss3we</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-p-sum-of-n-terms/sssss3we"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-p-sum-of-n-terms/sssss3we"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-p-sum-of-n-terms/sssss3we"/>
      <lastmod>2026-11-02T15:36:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-construction-exercise-updated/sssss3wv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-construction-exercise-updated/sssss3wv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-construction-exercise-updated/sssss3wv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-construction-exercise-updated/sssss3wv"/>
      <lastmod>2026-11-02T10:49:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-construction-exercise-updated/sssss3wv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-construction-exercise-updated/sssss3wv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-construction-exercise-updated/sssss3wv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-construction-exercise-updated/sssss3wv"/>
      <lastmod>2026-11-02T10:49:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/from-histograms-to-frequency-polygons-area-relationship-and-construction/sssss3w4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-histograms-to-frequency-polygons-area-relationship-and-construction/sssss3w4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-histograms-to-frequency-polygons-area-relationship-and-construction/sssss3w4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-histograms-to-frequency-polygons-area-relationship-and-construction/sssss3w4"/>
      <lastmod>2026-11-01T21:23:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/from-histograms-to-frequency-polygons-area-relationship-and-construction/sssss3w4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-histograms-to-frequency-polygons-area-relationship-and-construction/sssss3w4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-histograms-to-frequency-polygons-area-relationship-and-construction/sssss3w4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-histograms-to-frequency-polygons-area-relationship-and-construction/sssss3w4"/>
      <lastmod>2026-11-01T21:23:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/loci-on-complex-plane-arguments/sssss3wl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/loci-on-complex-plane-arguments/sssss3wl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/loci-on-complex-plane-arguments/sssss3wl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/loci-on-complex-plane-arguments/sssss3wl"/>
      <lastmod>2026-11-02T17:44:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/loci-on-complex-plane-arguments/sssss3wl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/loci-on-complex-plane-arguments/sssss3wl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/loci-on-complex-plane-arguments/sssss3wl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/loci-on-complex-plane-arguments/sssss3wl"/>
      <lastmod>2026-11-02T17:44:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-pyramid-nets/sssss3wy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-pyramid-nets/sssss3wy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-pyramid-nets/sssss3wy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-pyramid-nets/sssss3wy"/>
      <lastmod>2026-11-01T23:45:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-pyramid-nets/sssss3wy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-pyramid-nets/sssss3wy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-pyramid-nets/sssss3wy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-pyramid-nets/sssss3wy"/>
      <lastmod>2026-11-01T23:45:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-a-piecewise-function-about-xaxis-quick-geogebra-3d-demo/sssss3wa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-a-piecewise-function-about-xaxis-quick-geogebra-3d-demo/sssss3wa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-a-piecewise-function-about-xaxis-quick-geogebra-3d-demo/sssss3wa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-a-piecewise-function-about-xaxis-quick-geogebra-3d-demo/sssss3wa"/>
      <lastmod>2026-11-02T09:28:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-a-piecewise-function-about-xaxis-quick-geogebra-3d-demo/sssss3wa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-a-piecewise-function-about-xaxis-quick-geogebra-3d-demo/sssss3wa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-a-piecewise-function-about-xaxis-quick-geogebra-3d-demo/sssss3wa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-a-piecewise-function-about-xaxis-quick-geogebra-3d-demo/sssss3wa"/>
      <lastmod>2026-11-02T09:28:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-exterior-angles-of-polygons-dynamic-demonstration/sssss3wc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-exterior-angles-of-polygons-dynamic-demonstration/sssss3wc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-exterior-angles-of-polygons-dynamic-demonstration/sssss3wc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-exterior-angles-of-polygons-dynamic-demonstration/sssss3wc"/>
      <lastmod>2026-11-02T18:45:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-exterior-angles-of-polygons-dynamic-demonstration/sssss3wc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-exterior-angles-of-polygons-dynamic-demonstration/sssss3wc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-exterior-angles-of-polygons-dynamic-demonstration/sssss3wc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-exterior-angles-of-polygons-dynamic-demonstration/sssss3wc"/>
      <lastmod>2026-11-02T18:45:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/medians-and-centroid-illustrated-a-proof-without-words/sssss3wr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-and-centroid-illustrated-a-proof-without-words/sssss3wr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-and-centroid-illustrated-a-proof-without-words/sssss3wr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-and-centroid-illustrated-a-proof-without-words/sssss3wr"/>
      <lastmod>2026-11-02T16:29:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/medians-and-centroid-illustrated-a-proof-without-words/sssss3wr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-and-centroid-illustrated-a-proof-without-words/sssss3wr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-and-centroid-illustrated-a-proof-without-words/sssss3wr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-and-centroid-illustrated-a-proof-without-words/sssss3wr"/>
      <lastmod>2026-11-02T16:29:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolas-in-sports-tennis-service/sssss3wh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas-in-sports-tennis-service/sssss3wh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas-in-sports-tennis-service/sssss3wh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas-in-sports-tennis-service/sssss3wh"/>
      <lastmod>2026-11-01T20:56:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabolas-in-sports-tennis-service/sssss3wh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas-in-sports-tennis-service/sssss3wh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas-in-sports-tennis-service/sssss3wh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas-in-sports-tennis-service/sssss3wh"/>
      <lastmod>2026-11-01T20:56:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-waves-simulation-dynamic-waveforms-and-geometric-construction/sssss3wt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-waves-simulation-dynamic-waveforms-and-geometric-construction/sssss3wt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-waves-simulation-dynamic-waveforms-and-geometric-construction/sssss3wt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-waves-simulation-dynamic-waveforms-and-geometric-construction/sssss3wt"/>
      <lastmod>2026-11-01T19:16:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-waves-simulation-dynamic-waveforms-and-geometric-construction/sssss3wt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-waves-simulation-dynamic-waveforms-and-geometric-construction/sssss3wt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-waves-simulation-dynamic-waveforms-and-geometric-construction/sssss3wt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-waves-simulation-dynamic-waveforms-and-geometric-construction/sssss3wt"/>
      <lastmod>2026-11-01T19:16:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/example-of-unit-fractions/sssss3wx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-of-unit-fractions/sssss3wx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-of-unit-fractions/sssss3wx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-of-unit-fractions/sssss3wx"/>
      <lastmod>2026-11-02T09:00:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/example-of-unit-fractions/sssss3wx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-of-unit-fractions/sssss3wx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-of-unit-fractions/sssss3wx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-of-unit-fractions/sssss3wx"/>
      <lastmod>2026-11-02T09:00:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/baseball-throw-parabolic-trajectory-simulation-and-parameter-exploration/sssss3wi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baseball-throw-parabolic-trajectory-simulation-and-parameter-exploration/sssss3wi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baseball-throw-parabolic-trajectory-simulation-and-parameter-exploration/sssss3wi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baseball-throw-parabolic-trajectory-simulation-and-parameter-exploration/sssss3wi"/>
      <lastmod>2026-11-01T19:02:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/baseball-throw-parabolic-trajectory-simulation-and-parameter-exploration/sssss3wi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baseball-throw-parabolic-trajectory-simulation-and-parameter-exploration/sssss3wi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baseball-throw-parabolic-trajectory-simulation-and-parameter-exploration/sssss3wi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baseball-throw-parabolic-trajectory-simulation-and-parameter-exploration/sssss3wi"/>
      <lastmod>2026-11-01T19:02:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-and-polygon-construction/sssss3wo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-and-polygon-construction/sssss3wo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-and-polygon-construction/sssss3wo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-and-polygon-construction/sssss3wo"/>
      <lastmod>2026-11-02T18:39:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-and-polygon-construction/sssss3wo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-and-polygon-construction/sssss3wo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-and-polygon-construction/sssss3wo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-and-polygon-construction/sssss3wo"/>
      <lastmod>2026-11-02T18:39:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cn-symmetry-rotational-and-mirror-symmetry-visualization/sssss36s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cn-symmetry-rotational-and-mirror-symmetry-visualization/sssss36s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cn-symmetry-rotational-and-mirror-symmetry-visualization/sssss36s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cn-symmetry-rotational-and-mirror-symmetry-visualization/sssss36s"/>
      <lastmod>2026-11-02T17:53:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cn-symmetry-rotational-and-mirror-symmetry-visualization/sssss36s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cn-symmetry-rotational-and-mirror-symmetry-visualization/sssss36s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cn-symmetry-rotational-and-mirror-symmetry-visualization/sssss36s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cn-symmetry-rotational-and-mirror-symmetry-visualization/sssss36s"/>
      <lastmod>2026-11-02T17:53:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/girih-tiles-in-topkapi-scroll/sssss367</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/girih-tiles-in-topkapi-scroll/sssss367"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/girih-tiles-in-topkapi-scroll/sssss367"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/girih-tiles-in-topkapi-scroll/sssss367"/>
      <lastmod>2026-11-02T17:39:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/girih-tiles-in-topkapi-scroll/sssss367</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/girih-tiles-in-topkapi-scroll/sssss367"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/girih-tiles-in-topkapi-scroll/sssss367"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/girih-tiles-in-topkapi-scroll/sssss367"/>
      <lastmod>2026-11-02T17:39:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/research-linear-equations-sliders-for-slope-and-intercept/sssss36n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/research-linear-equations-sliders-for-slope-and-intercept/sssss36n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/research-linear-equations-sliders-for-slope-and-intercept/sssss36n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/research-linear-equations-sliders-for-slope-and-intercept/sssss36n"/>
      <lastmod>2026-11-01T19:03:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/research-linear-equations-sliders-for-slope-and-intercept/sssss36n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/research-linear-equations-sliders-for-slope-and-intercept/sssss36n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/research-linear-equations-sliders-for-slope-and-intercept/sssss36n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/research-linear-equations-sliders-for-slope-and-intercept/sssss36n"/>
      <lastmod>2026-11-01T19:03:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identify-rotated-polygons/sssss362</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-rotated-polygons/sssss362"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-rotated-polygons/sssss362"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-rotated-polygons/sssss362"/>
      <lastmod>2026-11-02T17:52:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identify-rotated-polygons/sssss362</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-rotated-polygons/sssss362"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-rotated-polygons/sssss362"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-rotated-polygons/sssss362"/>
      <lastmod>2026-11-02T17:52:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-construction-compass-4/sssss36k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-construction-compass-4/sssss36k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-construction-compass-4/sssss36k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-construction-compass-4/sssss36k"/>
      <lastmod>2026-11-02T18:34:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-construction-compass-4/sssss36k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-construction-compass-4/sssss36k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-construction-compass-4/sssss36k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-construction-compass-4/sssss36k"/>
      <lastmod>2026-11-02T18:34:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-basics-by-d-vasu-raj/sssss36z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-basics-by-d-vasu-raj/sssss36z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-basics-by-d-vasu-raj/sssss36z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-basics-by-d-vasu-raj/sssss36z"/>
      <lastmod>2026-11-02T00:26:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-basics-by-d-vasu-raj/sssss36z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-basics-by-d-vasu-raj/sssss36z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-basics-by-d-vasu-raj/sssss36z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-basics-by-d-vasu-raj/sssss36z"/>
      <lastmod>2026-11-02T00:26:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-of-revolution-about-x-axis/sssss360</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-about-x-axis/sssss360"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution-about-x-axis/sssss360"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-about-x-axis/sssss360"/>
      <lastmod>2026-11-02T00:10:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-of-revolution-about-x-axis/sssss360</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-about-x-axis/sssss360"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution-about-x-axis/sssss360"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-about-x-axis/sssss360"/>
      <lastmod>2026-11-02T00:10:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equations-of-circles-by-v-mannem/sssss36d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equations-of-circles-by-v-mannem/sssss36d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equations-of-circles-by-v-mannem/sssss36d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equations-of-circles-by-v-mannem/sssss36d"/>
      <lastmod>2026-11-02T15:39:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equations-of-circles-by-v-mannem/sssss36d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equations-of-circles-by-v-mannem/sssss36d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equations-of-circles-by-v-mannem/sssss36d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equations-of-circles-by-v-mannem/sssss36d"/>
      <lastmod>2026-11-02T15:39:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramids-in-prism/sssss36f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramids-in-prism/sssss36f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramids-in-prism/sssss36f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramids-in-prism/sssss36f"/>
      <lastmod>2026-11-02T17:57:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramids-in-prism/sssss36f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramids-in-prism/sssss36f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramids-in-prism/sssss36f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramids-in-prism/sssss36f"/>
      <lastmod>2026-11-02T17:57:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-rectangular-pyramids-g-ggmd-4/sssss368</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-pyramids-g-ggmd-4/sssss368"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-rectangular-pyramids-g-ggmd-4/sssss368"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-pyramids-g-ggmd-4/sssss368"/>
      <lastmod>2026-11-02T09:28:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-rectangular-pyramids-g-ggmd-4/sssss368</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-pyramids-g-ggmd-4/sssss368"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-rectangular-pyramids-g-ggmd-4/sssss368"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-pyramids-g-ggmd-4/sssss368"/>
      <lastmod>2026-11-02T09:28:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/napkin-ring-problem/sssss36u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/napkin-ring-problem/sssss36u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/napkin-ring-problem/sssss36u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/napkin-ring-problem/sssss36u"/>
      <lastmod>2026-11-01T20:42:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/napkin-ring-problem/sssss36u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/napkin-ring-problem/sssss36u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/napkin-ring-problem/sssss36u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/napkin-ring-problem/sssss36u"/>
      <lastmod>2026-11-01T20:42:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/incircle-and-reflection-construction/sssss365</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-and-reflection-construction/sssss365"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-and-reflection-construction/sssss365"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-and-reflection-construction/sssss365"/>
      <lastmod>2026-11-02T13:18:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/incircle-and-reflection-construction/sssss365</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-and-reflection-construction/sssss365"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-and-reflection-construction/sssss365"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-and-reflection-construction/sssss365"/>
      <lastmod>2026-11-02T13:18:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-demo-by-emiliosv/sssss36b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-demo-by-emiliosv/sssss36b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-demo-by-emiliosv/sssss36b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-demo-by-emiliosv/sssss36b"/>
      <lastmod>2026-11-02T12:19:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-demo-by-emiliosv/sssss36b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-demo-by-emiliosv/sssss36b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-demo-by-emiliosv/sssss36b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-demo-by-emiliosv/sssss36b"/>
      <lastmod>2026-11-02T12:19:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-vectors-by-servando-pineda-carranza/sssss363</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-vectors-by-servando-pineda-carranza/sssss363"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-vectors-by-servando-pineda-carranza/sssss363"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-vectors-by-servando-pineda-carranza/sssss363"/>
      <lastmod>2026-11-01T23:49:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-vectors-by-servando-pineda-carranza/sssss363</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-vectors-by-servando-pineda-carranza/sssss363"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-vectors-by-servando-pineda-carranza/sssss363"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-vectors-by-servando-pineda-carranza/sssss363"/>
      <lastmod>2026-11-01T23:49:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-sphere/sssss36q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-sphere/sssss36q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-volume-of-a-sphere/sssss36q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-sphere/sssss36q"/>
      <lastmod>2026-11-01T19:09:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-and-volume-of-a-sphere/sssss36q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-sphere/sssss36q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-volume-of-a-sphere/sssss36q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-sphere/sssss36q"/>
      <lastmod>2026-11-01T19:09:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-slope-intercept-form/sssss361</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-slope-intercept-form/sssss361"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-slope-intercept-form/sssss361"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-slope-intercept-form/sssss361"/>
      <lastmod>2026-11-01T20:58:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-slope-intercept-form/sssss361</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-slope-intercept-form/sssss361"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-slope-intercept-form/sssss361"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-slope-intercept-form/sssss361"/>
      <lastmod>2026-11-01T20:58:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locating-fractions-and-decimals-on-a-number-line/sssss36m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-fractions-and-decimals-on-a-number-line/sssss36m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-fractions-and-decimals-on-a-number-line/sssss36m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-fractions-and-decimals-on-a-number-line/sssss36m"/>
      <lastmod>2026-11-02T17:58:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locating-fractions-and-decimals-on-a-number-line/sssss36m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-fractions-and-decimals-on-a-number-line/sssss36m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-fractions-and-decimals-on-a-number-line/sssss36m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-fractions-and-decimals-on-a-number-line/sssss36m"/>
      <lastmod>2026-11-02T17:58:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-construction-by-d-jayaseelan/sssss36j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-construction-by-d-jayaseelan/sssss36j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-construction-by-d-jayaseelan/sssss36j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-construction-by-d-jayaseelan/sssss36j"/>
      <lastmod>2026-11-02T13:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-construction-by-d-jayaseelan/sssss36j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-construction-by-d-jayaseelan/sssss36j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-construction-by-d-jayaseelan/sssss36j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-construction-by-d-jayaseelan/sssss36j"/>
      <lastmod>2026-11-02T13:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-bisecting-example/sssss36p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-bisecting-example/sssss36p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-bisecting-example/sssss36p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-bisecting-example/sssss36p"/>
      <lastmod>2026-11-01T19:31:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-bisecting-example/sssss36p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-bisecting-example/sssss36p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-bisecting-example/sssss36p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-bisecting-example/sssss36p"/>
      <lastmod>2026-11-01T19:31:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtracting-fractions/sssss36w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtracting-fractions/sssss36w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtracting-fractions/sssss36w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtracting-fractions/sssss36w"/>
      <lastmod>2026-11-02T17:01:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtracting-fractions/sssss36w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtracting-fractions/sssss36w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtracting-fractions/sssss36w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtracting-fractions/sssss36w"/>
      <lastmod>2026-11-02T17:01:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-multiplication-demo-by-john-golden/sssss366</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demo-by-john-golden/sssss366"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-multiplication-demo-by-john-golden/sssss366"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demo-by-john-golden/sssss366"/>
      <lastmod>2026-11-02T00:43:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-multiplication-demo-by-john-golden/sssss366</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demo-by-john-golden/sssss366"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-multiplication-demo-by-john-golden/sssss366"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demo-by-john-golden/sssss366"/>
      <lastmod>2026-11-02T00:43:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/color-matching-game-scored/sssss36g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/color-matching-game-scored/sssss36g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/color-matching-game-scored/sssss36g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/color-matching-game-scored/sssss36g"/>
      <lastmod>2026-11-02T16:50:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/color-matching-game-scored/sssss36g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/color-matching-game-scored/sssss36g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/color-matching-game-scored/sssss36g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/color-matching-game-scored/sssss36g"/>
      <lastmod>2026-11-02T16:50:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squared-square/sssss369</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squared-square/sssss369"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squared-square/sssss369"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squared-square/sssss369"/>
      <lastmod>2026-11-02T07:05:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/squared-square/sssss369</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squared-square/sssss369"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squared-square/sssss369"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squared-square/sssss369"/>
      <lastmod>2026-11-02T07:05:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/torus-construction-demo/sssss36e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/torus-construction-demo/sssss36e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/torus-construction-demo/sssss36e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/torus-construction-demo/sssss36e"/>
      <lastmod>2026-11-02T02:29:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/torus-construction-demo/sssss36e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/torus-construction-demo/sssss36e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/torus-construction-demo/sssss36e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/torus-construction-demo/sssss36e"/>
      <lastmod>2026-11-02T02:29:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planet-system-ar/sssss36v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planet-system-ar/sssss36v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planet-system-ar/sssss36v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planet-system-ar/sssss36v"/>
      <lastmod>2026-11-01T23:47:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planet-system-ar/sssss36v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planet-system-ar/sssss36v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planet-system-ar/sssss36v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planet-system-ar/sssss36v"/>
      <lastmod>2026-11-01T23:47:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-oblong-and-square-numbers/sssss364</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-oblong-and-square-numbers/sssss364"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-oblong-and-square-numbers/sssss364"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-oblong-and-square-numbers/sssss364"/>
      <lastmod>2026-11-02T11:59:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-oblong-and-square-numbers/sssss364</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-oblong-and-square-numbers/sssss364"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-oblong-and-square-numbers/sssss364"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-oblong-and-square-numbers/sssss364"/>
      <lastmod>2026-11-02T11:59:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/yukawa-potential-and-derivative/sssss36l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/yukawa-potential-and-derivative/sssss36l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/yukawa-potential-and-derivative/sssss36l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/yukawa-potential-and-derivative/sssss36l"/>
      <lastmod>2026-11-01T19:03:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/yukawa-potential-and-derivative/sssss36l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/yukawa-potential-and-derivative/sssss36l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/yukawa-potential-and-derivative/sssss36l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/yukawa-potential-and-derivative/sssss36l"/>
      <lastmod>2026-11-01T19:03:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-construction-via-focus-definition/sssss36y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-construction-via-focus-definition/sssss36y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-construction-via-focus-definition/sssss36y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-construction-via-focus-definition/sssss36y"/>
      <lastmod>2026-11-02T13:53:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-construction-via-focus-definition/sssss36y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-construction-via-focus-definition/sssss36y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-construction-via-focus-definition/sssss36y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-construction-via-focus-definition/sssss36y"/>
      <lastmod>2026-11-02T13:53:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cardioids-in-a-golden-spiral/sssss36a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cardioids-in-a-golden-spiral/sssss36a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cardioids-in-a-golden-spiral/sssss36a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cardioids-in-a-golden-spiral/sssss36a"/>
      <lastmod>2026-11-01T21:02:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cardioids-in-a-golden-spiral/sssss36a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cardioids-in-a-golden-spiral/sssss36a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cardioids-in-a-golden-spiral/sssss36a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cardioids-in-a-golden-spiral/sssss36a"/>
      <lastmod>2026-11-01T21:02:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/magic-eight-times-table-grid-patterns-and-geometric-transformations/sssss36c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magic-eight-times-table-grid-patterns-and-geometric-transformations/sssss36c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magic-eight-times-table-grid-patterns-and-geometric-transformations/sssss36c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magic-eight-times-table-grid-patterns-and-geometric-transformations/sssss36c"/>
      <lastmod>2026-11-01T19:10:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/magic-eight-times-table-grid-patterns-and-geometric-transformations/sssss36c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magic-eight-times-table-grid-patterns-and-geometric-transformations/sssss36c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magic-eight-times-table-grid-patterns-and-geometric-transformations/sssss36c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magic-eight-times-table-grid-patterns-and-geometric-transformations/sssss36c"/>
      <lastmod>2026-11-01T19:10:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-volumes-of-revolution-and-cross-sections/sssss36r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volumes-of-revolution-and-cross-sections/sssss36r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volumes-of-revolution-and-cross-sections/sssss36r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volumes-of-revolution-and-cross-sections/sssss36r"/>
      <lastmod>2026-11-02T17:47:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-volumes-of-revolution-and-cross-sections/sssss36r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volumes-of-revolution-and-cross-sections/sssss36r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volumes-of-revolution-and-cross-sections/sssss36r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volumes-of-revolution-and-cross-sections/sssss36r"/>
      <lastmod>2026-11-02T17:47:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-the-absolute-value-of-a-quadratic-function/sssss36h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-the-absolute-value-of-a-quadratic-function/sssss36h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-the-absolute-value-of-a-quadratic-function/sssss36h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-the-absolute-value-of-a-quadratic-function/sssss36h"/>
      <lastmod>2026-11-01T23:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-the-absolute-value-of-a-quadratic-function/sssss36h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-the-absolute-value-of-a-quadratic-function/sssss36h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-the-absolute-value-of-a-quadratic-function/sssss36h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-the-absolute-value-of-a-quadratic-function/sssss36h"/>
      <lastmod>2026-11-01T23:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-3-9-practice-applying-area-of-circles/sssss36t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-3-9-practice-applying-area-of-circles/sssss36t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-3-9-practice-applying-area-of-circles/sssss36t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-3-9-practice-applying-area-of-circles/sssss36t"/>
      <lastmod>2026-11-02T10:37:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-3-9-practice-applying-area-of-circles/sssss36t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-3-9-practice-applying-area-of-circles/sssss36t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-3-9-practice-applying-area-of-circles/sssss36t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-3-9-practice-applying-area-of-circles/sssss36t"/>
      <lastmod>2026-11-02T10:37:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-volume-exploration-module-8b-sugeng-suprayogi-smk-negeri-1-bontang/sssss36x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-exploration-module-8b-sugeng-suprayogi-smk-negeri-1-bontang/sssss36x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-exploration-module-8b-sugeng-suprayogi-smk-negeri-1-bontang/sssss36x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-exploration-module-8b-sugeng-suprayogi-smk-negeri-1-bontang/sssss36x"/>
      <lastmod>2026-11-02T00:48:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-volume-exploration-module-8b-sugeng-suprayogi-smk-negeri-1-bontang/sssss36x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-exploration-module-8b-sugeng-suprayogi-smk-negeri-1-bontang/sssss36x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-exploration-module-8b-sugeng-suprayogi-smk-negeri-1-bontang/sssss36x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-exploration-module-8b-sugeng-suprayogi-smk-negeri-1-bontang/sssss36x"/>
      <lastmod>2026-11-02T00:48:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-hole/sssss36i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-hole/sssss36i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-hole/sssss36i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-hole/sssss36i"/>
      <lastmod>2026-11-02T17:00:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-hole/sssss36i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-hole/sssss36i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-hole/sssss36i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-hole/sssss36i"/>
      <lastmod>2026-11-02T17:00:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-complex-number-addition-and-subtraction/sssss36o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-complex-number-addition-and-subtraction/sssss36o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-complex-number-addition-and-subtraction/sssss36o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-complex-number-addition-and-subtraction/sssss36o"/>
      <lastmod>2026-11-01T21:03:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-complex-number-addition-and-subtraction/sssss36o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-complex-number-addition-and-subtraction/sssss36o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-complex-number-addition-and-subtraction/sssss36o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-complex-number-addition-and-subtraction/sssss36o"/>
      <lastmod>2026-11-01T21:03:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mesore-mode-with-period-2/sssss3gs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mesore-mode-with-period-2/sssss3gs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mesore-mode-with-period-2/sssss3gs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mesore-mode-with-period-2/sssss3gs"/>
      <lastmod>2026-11-02T07:11:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mesore-mode-with-period-2/sssss3gs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mesore-mode-with-period-2/sssss3gs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mesore-mode-with-period-2/sssss3gs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mesore-mode-with-period-2/sssss3gs"/>
      <lastmod>2026-11-02T07:11:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-area-by-peeling/sssss3g7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-area-by-peeling/sssss3g7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-area-by-peeling/sssss3g7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-area-by-peeling/sssss3g7"/>
      <lastmod>2026-11-02T00:56:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-area-by-peeling/sssss3g7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-area-by-peeling/sssss3g7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-area-by-peeling/sssss3g7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-area-by-peeling/sssss3g7"/>
      <lastmod>2026-11-02T00:56:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-at-a-point-on-a-line/sssss3gn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-at-a-point-on-a-line/sssss3gn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-at-a-point-on-a-line/sssss3gn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-at-a-point-on-a-line/sssss3gn"/>
      <lastmod>2026-11-02T12:25:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-at-a-point-on-a-line/sssss3gn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-at-a-point-on-a-line/sssss3gn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-at-a-point-on-a-line/sssss3gn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-at-a-point-on-a-line/sssss3gn"/>
      <lastmod>2026-11-02T12:25:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/altitudes-and-orthocenter-in-a-triangle/sssss3g2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/altitudes-and-orthocenter-in-a-triangle/sssss3g2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/altitudes-and-orthocenter-in-a-triangle/sssss3g2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/altitudes-and-orthocenter-in-a-triangle/sssss3g2"/>
      <lastmod>2026-11-02T16:52:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/altitudes-and-orthocenter-in-a-triangle/sssss3g2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/altitudes-and-orthocenter-in-a-triangle/sssss3g2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/altitudes-and-orthocenter-in-a-triangle/sssss3g2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/altitudes-and-orthocenter-in-a-triangle/sssss3g2"/>
      <lastmod>2026-11-02T16:52:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/baseball-scatter-plot/sssss3gk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baseball-scatter-plot/sssss3gk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baseball-scatter-plot/sssss3gk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baseball-scatter-plot/sssss3gk"/>
      <lastmod>2026-11-02T15:55:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/baseball-scatter-plot/sssss3gk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baseball-scatter-plot/sssss3gk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baseball-scatter-plot/sssss3gk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baseball-scatter-plot/sssss3gk"/>
      <lastmod>2026-11-02T15:55:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-an-ellipse-conics-series-10/sssss3gz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-an-ellipse-conics-series-10/sssss3gz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-an-ellipse-conics-series-10/sssss3gz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-an-ellipse-conics-series-10/sssss3gz"/>
      <lastmod>2026-11-02T18:39:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-an-ellipse-conics-series-10/sssss3gz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-an-ellipse-conics-series-10/sssss3gz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-an-ellipse-conics-series-10/sssss3gz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-an-ellipse-conics-series-10/sssss3gz"/>
      <lastmod>2026-11-02T18:39:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cotangent-using-similar-triangles/sssss3g0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cotangent-using-similar-triangles/sssss3g0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cotangent-using-similar-triangles/sssss3g0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cotangent-using-similar-triangles/sssss3g0"/>
      <lastmod>2026-11-02T17:05:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cotangent-using-similar-triangles/sssss3g0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cotangent-using-similar-triangles/sssss3g0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cotangent-using-similar-triangles/sssss3g0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cotangent-using-similar-triangles/sssss3g0"/>
      <lastmod>2026-11-02T17:05:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-equilateral-triangles/sssss3gd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-equilateral-triangles/sssss3gd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-equilateral-triangles/sssss3gd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-equilateral-triangles/sssss3gd"/>
      <lastmod>2026-11-01T21:11:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-equilateral-triangles/sssss3gd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-equilateral-triangles/sssss3gd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-equilateral-triangles/sssss3gd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-equilateral-triangles/sssss3gd"/>
      <lastmod>2026-11-01T21:11:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ordinary-simple-annuity-demonstration/sssss3gf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ordinary-simple-annuity-demonstration/sssss3gf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ordinary-simple-annuity-demonstration/sssss3gf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ordinary-simple-annuity-demonstration/sssss3gf"/>
      <lastmod>2026-11-01T23:40:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ordinary-simple-annuity-demonstration/sssss3gf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ordinary-simple-annuity-demonstration/sssss3gf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ordinary-simple-annuity-demonstration/sssss3gf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ordinary-simple-annuity-demonstration/sssss3gf"/>
      <lastmod>2026-11-01T23:40:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-a-construction/sssss3g8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-a-construction/sssss3g8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-a-construction/sssss3g8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-a-construction/sssss3g8"/>
      <lastmod>2026-11-01T21:54:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-a-construction/sssss3g8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-a-construction/sssss3g8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-a-construction/sssss3g8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-a-construction/sssss3g8"/>
      <lastmod>2026-11-01T21:54:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-minimum-value-of-quadratic-functions/sssss3gu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-minimum-value-of-quadratic-functions/sssss3gu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-minimum-value-of-quadratic-functions/sssss3gu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-minimum-value-of-quadratic-functions/sssss3gu"/>
      <lastmod>2026-11-01T19:00:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-minimum-value-of-quadratic-functions/sssss3gu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-minimum-value-of-quadratic-functions/sssss3gu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-minimum-value-of-quadratic-functions/sssss3gu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-minimum-value-of-quadratic-functions/sssss3gu"/>
      <lastmod>2026-11-01T19:00:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-without-words-arithmetic-sequences/sssss3g5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-arithmetic-sequences/sssss3g5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-arithmetic-sequences/sssss3g5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-arithmetic-sequences/sssss3g5"/>
      <lastmod>2026-11-01T19:31:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-without-words-arithmetic-sequences/sssss3g5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-arithmetic-sequences/sssss3g5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-arithmetic-sequences/sssss3g5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-arithmetic-sequences/sssss3g5"/>
      <lastmod>2026-11-01T19:31:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/numerical-integration-with-riemann-sums/sssss3gb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numerical-integration-with-riemann-sums/sssss3gb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numerical-integration-with-riemann-sums/sssss3gb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numerical-integration-with-riemann-sums/sssss3gb"/>
      <lastmod>2026-11-02T17:38:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/numerical-integration-with-riemann-sums/sssss3gb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numerical-integration-with-riemann-sums/sssss3gb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numerical-integration-with-riemann-sums/sssss3gb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numerical-integration-with-riemann-sums/sssss3gb"/>
      <lastmod>2026-11-02T17:38:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/theorem-12-1-8/sssss3g3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/theorem-12-1-8/sssss3g3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/theorem-12-1-8/sssss3g3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/theorem-12-1-8/sssss3g3"/>
      <lastmod>2026-11-02T00:45:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/theorem-12-1-8/sssss3g3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/theorem-12-1-8/sssss3g3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/theorem-12-1-8/sssss3g3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/theorem-12-1-8/sssss3g3"/>
      <lastmod>2026-11-02T00:45:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-investigation-zeros-and-intersections-with-coordinate-axes/sssss3gq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-investigation-zeros-and-intersections-with-coordinate-axes/sssss3gq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-investigation-zeros-and-intersections-with-coordinate-axes/sssss3gq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-investigation-zeros-and-intersections-with-coordinate-axes/sssss3gq"/>
      <lastmod>2026-11-02T10:45:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-investigation-zeros-and-intersections-with-coordinate-axes/sssss3gq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-investigation-zeros-and-intersections-with-coordinate-axes/sssss3gq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-investigation-zeros-and-intersections-with-coordinate-axes/sssss3gq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-investigation-zeros-and-intersections-with-coordinate-axes/sssss3gq"/>
      <lastmod>2026-11-02T10:45:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/second-method-for-constructing-an-ellipse/sssss3g1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/second-method-for-constructing-an-ellipse/sssss3g1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/second-method-for-constructing-an-ellipse/sssss3g1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/second-method-for-constructing-an-ellipse/sssss3g1"/>
      <lastmod>2026-11-02T12:24:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/second-method-for-constructing-an-ellipse/sssss3g1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/second-method-for-constructing-an-ellipse/sssss3g1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/second-method-for-constructing-an-ellipse/sssss3g1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/second-method-for-constructing-an-ellipse/sssss3g1"/>
      <lastmod>2026-11-02T12:24:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copy-a-line-segment-by-164202/sssss3gm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-by-164202/sssss3gm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-a-line-segment-by-164202/sssss3gm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-by-164202/sssss3gm"/>
      <lastmod>2026-11-01T21:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copy-a-line-segment-by-164202/sssss3gm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-by-164202/sssss3gm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-a-line-segment-by-164202/sssss3gm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-by-164202/sssss3gm"/>
      <lastmod>2026-11-01T21:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/octahedron-for-geometry-teaching/sssss3gj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octahedron-for-geometry-teaching/sssss3gj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octahedron-for-geometry-teaching/sssss3gj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octahedron-for-geometry-teaching/sssss3gj"/>
      <lastmod>2026-11-02T17:37:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/octahedron-for-geometry-teaching/sssss3gj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octahedron-for-geometry-teaching/sssss3gj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octahedron-for-geometry-teaching/sssss3gj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octahedron-for-geometry-teaching/sssss3gj"/>
      <lastmod>2026-11-02T17:37:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/altitudes-in-triangles/sssss3gp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/altitudes-in-triangles/sssss3gp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/altitudes-in-triangles/sssss3gp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/altitudes-in-triangles/sssss3gp"/>
      <lastmod>2026-11-01T21:30:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/altitudes-in-triangles/sssss3gp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/altitudes-in-triangles/sssss3gp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/altitudes-in-triangles/sssss3gp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/altitudes-in-triangles/sssss3gp"/>
      <lastmod>2026-11-01T21:30:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-section-by-parallel-plane/sssss3gw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-section-by-parallel-plane/sssss3gw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-section-by-parallel-plane/sssss3gw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-section-by-parallel-plane/sssss3gw"/>
      <lastmod>2026-11-01T22:00:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-section-by-parallel-plane/sssss3gw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-section-by-parallel-plane/sssss3gw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-section-by-parallel-plane/sssss3gw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-section-by-parallel-plane/sssss3gw"/>
      <lastmod>2026-11-01T22:00:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-square-roots-practice/sssss3g6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-square-roots-practice/sssss3g6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-square-roots-practice/sssss3g6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-square-roots-practice/sssss3g6"/>
      <lastmod>2026-11-01T21:49:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-square-roots-practice/sssss3g6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-square-roots-practice/sssss3g6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-square-roots-practice/sssss3g6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-square-roots-practice/sssss3g6"/>
      <lastmod>2026-11-01T21:49:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-art-tudor-vlad-9d-geometric-transformations/sssss3gg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-art-tudor-vlad-9d-geometric-transformations/sssss3gg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-art-tudor-vlad-9d-geometric-transformations/sssss3gg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-art-tudor-vlad-9d-geometric-transformations/sssss3gg"/>
      <lastmod>2026-11-01T21:44:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-art-tudor-vlad-9d-geometric-transformations/sssss3gg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-art-tudor-vlad-9d-geometric-transformations/sssss3gg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-art-tudor-vlad-9d-geometric-transformations/sssss3gg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-art-tudor-vlad-9d-geometric-transformations/sssss3gg"/>
      <lastmod>2026-11-01T21:44:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/balance-the-farmer-s-stone/sssss3g9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/balance-the-farmer-s-stone/sssss3g9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/balance-the-farmer-s-stone/sssss3g9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/balance-the-farmer-s-stone/sssss3g9"/>
      <lastmod>2026-11-02T13:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/balance-the-farmer-s-stone/sssss3g9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/balance-the-farmer-s-stone/sssss3g9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/balance-the-farmer-s-stone/sssss3g9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/balance-the-farmer-s-stone/sssss3g9"/>
      <lastmod>2026-11-02T13:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-slide-demonstration/sssss3ge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-slide-demonstration/sssss3ge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-slide-demonstration/sssss3ge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-slide-demonstration/sssss3ge"/>
      <lastmod>2026-11-01T23:50:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-slide-demonstration/sssss3ge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-slide-demonstration/sssss3ge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-slide-demonstration/sssss3ge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-slide-demonstration/sssss3ge"/>
      <lastmod>2026-11-01T23:50:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-numbers-with-animation/sssss3gv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-numbers-with-animation/sssss3gv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-numbers-with-animation/sssss3gv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-numbers-with-animation/sssss3gv"/>
      <lastmod>2026-11-02T00:17:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-numbers-with-animation/sssss3gv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-numbers-with-animation/sssss3gv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-numbers-with-animation/sssss3gv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-numbers-with-animation/sssss3gv"/>
      <lastmod>2026-11-02T00:17:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inscribed-angle-theorem-dynamic-demonstration/sssss3g4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-angle-theorem-dynamic-demonstration/sssss3g4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-angle-theorem-dynamic-demonstration/sssss3g4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-angle-theorem-dynamic-demonstration/sssss3g4"/>
      <lastmod>2026-11-02T16:50:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inscribed-angle-theorem-dynamic-demonstration/sssss3g4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-angle-theorem-dynamic-demonstration/sssss3g4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-angle-theorem-dynamic-demonstration/sssss3g4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-angle-theorem-dynamic-demonstration/sssss3g4"/>
      <lastmod>2026-11-02T16:50:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copy-of-volumes-exploring-volume-through-geometric-transformations/sssss3gl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-of-volumes-exploring-volume-through-geometric-transformations/sssss3gl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-of-volumes-exploring-volume-through-geometric-transformations/sssss3gl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-of-volumes-exploring-volume-through-geometric-transformations/sssss3gl"/>
      <lastmod>2026-11-02T17:55:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copy-of-volumes-exploring-volume-through-geometric-transformations/sssss3gl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-of-volumes-exploring-volume-through-geometric-transformations/sssss3gl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-of-volumes-exploring-volume-through-geometric-transformations/sssss3gl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-of-volumes-exploring-volume-through-geometric-transformations/sssss3gl"/>
      <lastmod>2026-11-02T17:55:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ambiguous-case-of-the-law-of-sines/sssss3gy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-the-law-of-sines/sssss3gy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ambiguous-case-of-the-law-of-sines/sssss3gy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-the-law-of-sines/sssss3gy"/>
      <lastmod>2026-11-02T15:49:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ambiguous-case-of-the-law-of-sines/sssss3gy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-the-law-of-sines/sssss3gy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ambiguous-case-of-the-law-of-sines/sssss3gy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-the-law-of-sines/sssss3gy"/>
      <lastmod>2026-11-02T15:49:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/combining-like-terms-across-groups-demo/sssss3ga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combining-like-terms-across-groups-demo/sssss3ga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combining-like-terms-across-groups-demo/sssss3ga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combining-like-terms-across-groups-demo/sssss3ga"/>
      <lastmod>2026-11-01T23:53:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/combining-like-terms-across-groups-demo/sssss3ga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combining-like-terms-across-groups-demo/sssss3ga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combining-like-terms-across-groups-demo/sssss3ga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combining-like-terms-across-groups-demo/sssss3ga"/>
      <lastmod>2026-11-01T23:53:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inscribed-quadrilateral-and-eccentric-angles/sssss3gc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-quadrilateral-and-eccentric-angles/sssss3gc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-quadrilateral-and-eccentric-angles/sssss3gc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-quadrilateral-and-eccentric-angles/sssss3gc"/>
      <lastmod>2026-11-01T21:11:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inscribed-quadrilateral-and-eccentric-angles/sssss3gc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-quadrilateral-and-eccentric-angles/sssss3gc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-quadrilateral-and-eccentric-angles/sssss3gc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-quadrilateral-and-eccentric-angles/sssss3gc"/>
      <lastmod>2026-11-01T21:11:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-of-elevation-and-depression/sssss3gr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-of-elevation-and-depression/sssss3gr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-of-elevation-and-depression/sssss3gr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-of-elevation-and-depression/sssss3gr"/>
      <lastmod>2026-11-02T16:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-of-elevation-and-depression/sssss3gr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-of-elevation-and-depression/sssss3gr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-of-elevation-and-depression/sssss3gr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-of-elevation-and-depression/sssss3gr"/>
      <lastmod>2026-11-02T16:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-exterior-angles-of-a-quadrilateral/sssss3gh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-exterior-angles-of-a-quadrilateral/sssss3gh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-exterior-angles-of-a-quadrilateral/sssss3gh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-exterior-angles-of-a-quadrilateral/sssss3gh"/>
      <lastmod>2026-11-02T17:13:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-exterior-angles-of-a-quadrilateral/sssss3gh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-exterior-angles-of-a-quadrilateral/sssss3gh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-exterior-angles-of-a-quadrilateral/sssss3gh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-exterior-angles-of-a-quadrilateral/sssss3gh"/>
      <lastmod>2026-11-02T17:13:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/zeros-of-parabolas/sssss3gt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/zeros-of-parabolas/sssss3gt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/zeros-of-parabolas/sssss3gt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/zeros-of-parabolas/sssss3gt"/>
      <lastmod>2026-11-02T15:18:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/zeros-of-parabolas/sssss3gt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/zeros-of-parabolas/sssss3gt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/zeros-of-parabolas/sssss3gt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/zeros-of-parabolas/sssss3gt"/>
      <lastmod>2026-11-02T15:18:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-exploration/sssss3gx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-exploration/sssss3gx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-exploration/sssss3gx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-exploration/sssss3gx"/>
      <lastmod>2026-11-01T23:29:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-exploration/sssss3gx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-exploration/sssss3gx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-exploration/sssss3gx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-exploration/sssss3gx"/>
      <lastmod>2026-11-01T23:29:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-translation-matcher/sssss3gi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-translation-matcher/sssss3gi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-translation-matcher/sssss3gi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-translation-matcher/sssss3gi"/>
      <lastmod>2026-11-02T13:38:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-translation-matcher/sssss3gi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-translation-matcher/sssss3gi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-translation-matcher/sssss3gi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-translation-matcher/sssss3gi"/>
      <lastmod>2026-11-02T13:38:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-1-15-lesson-more-nets-more-surface-area/sssss3go</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-1-15-lesson-more-nets-more-surface-area/sssss3go"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-1-15-lesson-more-nets-more-surface-area/sssss3go"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-1-15-lesson-more-nets-more-surface-area/sssss3go"/>
      <lastmod>2026-11-01T20:41:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-1-15-lesson-more-nets-more-surface-area/sssss3go</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-1-15-lesson-more-nets-more-surface-area/sssss3go"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-1-15-lesson-more-nets-more-surface-area/sssss3go"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-1-15-lesson-more-nets-more-surface-area/sssss3go"/>
      <lastmod>2026-11-01T20:41:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-volume/sssss39s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-volume/sssss39s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-volume/sssss39s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-volume/sssss39s"/>
      <lastmod>2026-11-02T18:55:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-volume/sssss39s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-volume/sssss39s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-volume/sssss39s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-volume/sssss39s"/>
      <lastmod>2026-11-02T18:55:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-known-cross-sections/sssss397</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-known-cross-sections/sssss397"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-known-cross-sections/sssss397"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-known-cross-sections/sssss397"/>
      <lastmod>2026-11-02T09:55:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-known-cross-sections/sssss397</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-known-cross-sections/sssss397"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-known-cross-sections/sssss397"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-known-cross-sections/sssss397"/>
      <lastmod>2026-11-02T09:55:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-angle-bisector-construction/sssss39n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-angle-bisector-construction/sssss39n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-angle-bisector-construction/sssss39n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-angle-bisector-construction/sssss39n"/>
      <lastmod>2026-11-01T21:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-angle-bisector-construction/sssss39n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-angle-bisector-construction/sssss39n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-angle-bisector-construction/sssss39n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-angle-bisector-construction/sssss39n"/>
      <lastmod>2026-11-01T21:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-scaled-copies/sssss392</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-scaled-copies/sssss392"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-scaled-copies/sssss392"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-scaled-copies/sssss392"/>
      <lastmod>2026-11-01T20:32:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-scaled-copies/sssss392</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-scaled-copies/sssss392"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-scaled-copies/sssss392"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-scaled-copies/sssss392"/>
      <lastmod>2026-11-01T20:32:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by-dr-abraham-varghese/sssss39k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by-dr-abraham-varghese/sssss39k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-and-logarithmic-functions-by-dr-abraham-varghese/sssss39k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by-dr-abraham-varghese/sssss39k"/>
      <lastmod>2026-11-02T18:44:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-and-logarithmic-functions-by-dr-abraham-varghese/sssss39k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by-dr-abraham-varghese/sssss39k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-and-logarithmic-functions-by-dr-abraham-varghese/sssss39k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by-dr-abraham-varghese/sssss39k"/>
      <lastmod>2026-11-02T18:44:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-quadratic-expressions-demo/sssss39z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-quadratic-expressions-demo/sssss39z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-quadratic-expressions-demo/sssss39z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-quadratic-expressions-demo/sssss39z"/>
      <lastmod>2026-11-01T19:05:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-quadratic-expressions-demo/sssss39z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-quadratic-expressions-demo/sssss39z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-quadratic-expressions-demo/sssss39z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-quadratic-expressions-demo/sssss39z"/>
      <lastmod>2026-11-01T19:05:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-curves/sssss390</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-curves/sssss390"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-curves/sssss390"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-curves/sssss390"/>
      <lastmod>2026-11-01T19:09:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-curves/sssss390</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-curves/sssss390"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-curves/sssss390"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-curves/sssss390"/>
      <lastmod>2026-11-01T19:09:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-side-ratios/sssss39d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-side-ratios/sssss39d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-side-ratios/sssss39d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-side-ratios/sssss39d"/>
      <lastmod>2026-11-02T08:49:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-side-ratios/sssss39d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-side-ratios/sssss39d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-side-ratios/sssss39d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-side-ratios/sssss39d"/>
      <lastmod>2026-11-02T08:49:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wordless-proof-metric-relation-1/sssss39f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wordless-proof-metric-relation-1/sssss39f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wordless-proof-metric-relation-1/sssss39f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wordless-proof-metric-relation-1/sssss39f"/>
      <lastmod>2026-11-01T23:09:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wordless-proof-metric-relation-1/sssss39f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wordless-proof-metric-relation-1/sssss39f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wordless-proof-metric-relation-1/sssss39f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wordless-proof-metric-relation-1/sssss39f"/>
      <lastmod>2026-11-01T23:09:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-inequalities-part-1/sssss398</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-inequalities-part-1/sssss398"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-inequalities-part-1/sssss398"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-inequalities-part-1/sssss398"/>
      <lastmod>2026-11-02T16:57:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-inequalities-part-1/sssss398</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-inequalities-part-1/sssss398"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-inequalities-part-1/sssss398"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-inequalities-part-1/sssss398"/>
      <lastmod>2026-11-02T16:57:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-fractions/sssss39u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-fractions/sssss39u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-fractions/sssss39u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-fractions/sssss39u"/>
      <lastmod>2026-11-01T19:02:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-fractions/sssss39u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-fractions/sssss39u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-fractions/sssss39u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-fractions/sssss39u"/>
      <lastmod>2026-11-01T19:02:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-perimeter-algebra/sssss395</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-perimeter-algebra/sssss395"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-perimeter-algebra/sssss395"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-perimeter-algebra/sssss395"/>
      <lastmod>2026-11-01T23:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-perimeter-algebra/sssss395</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-perimeter-algebra/sssss395"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-perimeter-algebra/sssss395"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-perimeter-algebra/sssss395"/>
      <lastmod>2026-11-01T23:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-congruence-determination/sssss39b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-congruence-determination/sssss39b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-congruence-determination/sssss39b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-congruence-determination/sssss39b"/>
      <lastmod>2026-11-02T14:56:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-congruence-determination/sssss39b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-congruence-determination/sssss39b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-congruence-determination/sssss39b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-congruence-determination/sssss39b"/>
      <lastmod>2026-11-02T14:56:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mario-and-parabolas/sssss393</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mario-and-parabolas/sssss393"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mario-and-parabolas/sssss393"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mario-and-parabolas/sssss393"/>
      <lastmod>2026-11-01T21:57:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mario-and-parabolas/sssss393</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mario-and-parabolas/sssss393"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mario-and-parabolas/sssss393"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mario-and-parabolas/sssss393"/>
      <lastmod>2026-11-01T21:57:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-sum-vs-definite-integral/sssss39q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sum-vs-definite-integral/sssss39q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sum-vs-definite-integral/sssss39q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sum-vs-definite-integral/sssss39q"/>
      <lastmod>2026-11-02T02:43:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-sum-vs-definite-integral/sssss39q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sum-vs-definite-integral/sssss39q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sum-vs-definite-integral/sssss39q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sum-vs-definite-integral/sssss39q"/>
      <lastmod>2026-11-02T02:43:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-and-a-cone/sssss391</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-a-cone/sssss391"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-and-a-cone/sssss391"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-a-cone/sssss391"/>
      <lastmod>2026-11-01T23:27:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-and-a-cone/sssss391</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-a-cone/sssss391"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-and-a-cone/sssss391"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-a-cone/sssss391"/>
      <lastmod>2026-11-01T23:27:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/incircle-of-a-triangle-by-geogebra-team/sssss39m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-of-a-triangle-by-geogebra-team/sssss39m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-of-a-triangle-by-geogebra-team/sssss39m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-of-a-triangle-by-geogebra-team/sssss39m"/>
      <lastmod>2026-11-01T22:03:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/incircle-of-a-triangle-by-geogebra-team/sssss39m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-of-a-triangle-by-geogebra-team/sssss39m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-of-a-triangle-by-geogebra-team/sssss39m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-of-a-triangle-by-geogebra-team/sssss39m"/>
      <lastmod>2026-11-01T22:03:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discontinuity-at-the-origin/sssss39j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discontinuity-at-the-origin/sssss39j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discontinuity-at-the-origin/sssss39j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discontinuity-at-the-origin/sssss39j"/>
      <lastmod>2026-11-02T02:37:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discontinuity-at-the-origin/sssss39j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discontinuity-at-the-origin/sssss39j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discontinuity-at-the-origin/sssss39j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discontinuity-at-the-origin/sssss39j"/>
      <lastmod>2026-11-02T02:37:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-problems-about-proportional-relationships/sssss39p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-problems-about-proportional-relationships/sssss39p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-problems-about-proportional-relationships/sssss39p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-problems-about-proportional-relationships/sssss39p"/>
      <lastmod>2026-11-01T23:04:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-problems-about-proportional-relationships/sssss39p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-problems-about-proportional-relationships/sssss39p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-problems-about-proportional-relationships/sssss39p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-problems-about-proportional-relationships/sssss39p"/>
      <lastmod>2026-11-01T23:04:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-similar-cuboids-by-dan-dale/sssss39w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-similar-cuboids-by-dan-dale/sssss39w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-and-surface-areas-of-similar-cuboids-by-dan-dale/sssss39w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-similar-cuboids-by-dan-dale/sssss39w"/>
      <lastmod>2026-11-01T23:18:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-and-surface-areas-of-similar-cuboids-by-dan-dale/sssss39w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-similar-cuboids-by-dan-dale/sssss39w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-and-surface-areas-of-similar-cuboids-by-dan-dale/sssss39w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-similar-cuboids-by-dan-dale/sssss39w"/>
      <lastmod>2026-11-01T23:18:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/variation-of-g-below-earth-surface/sssss396</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variation-of-g-below-earth-surface/sssss396"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variation-of-g-below-earth-surface/sssss396"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variation-of-g-below-earth-surface/sssss396"/>
      <lastmod>2026-11-02T16:45:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/variation-of-g-below-earth-surface/sssss396</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variation-of-g-below-earth-surface/sssss396"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variation-of-g-below-earth-surface/sssss396"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variation-of-g-below-earth-surface/sssss396"/>
      <lastmod>2026-11-02T16:45:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-block-with-two-holes-composite-figures/sssss39g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-block-with-two-holes-composite-figures/sssss39g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-block-with-two-holes-composite-figures/sssss39g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-block-with-two-holes-composite-figures/sssss39g"/>
      <lastmod>2026-11-01T20:51:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-block-with-two-holes-composite-figures/sssss39g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-block-with-two-holes-composite-figures/sssss39g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-block-with-two-holes-composite-figures/sssss39g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-block-with-two-holes-composite-figures/sssss39g"/>
      <lastmod>2026-11-01T20:51:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-polynomial/sssss399</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-polynomial/sssss399"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-polynomial/sssss399"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-polynomial/sssss399"/>
      <lastmod>2026-11-01T19:20:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-polynomial/sssss399</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-polynomial/sssss399"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-polynomial/sssss399"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-polynomial/sssss399"/>
      <lastmod>2026-11-01T19:20:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equations-of-circles/sssss39e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equations-of-circles/sssss39e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equations-of-circles/sssss39e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equations-of-circles/sssss39e"/>
      <lastmod>2026-11-02T00:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equations-of-circles/sssss39e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equations-of-circles/sssss39e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equations-of-circles/sssss39e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equations-of-circles/sssss39e"/>
      <lastmod>2026-11-02T00:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mean-from-frequency-table/sssss39v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-from-frequency-table/sssss39v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-from-frequency-table/sssss39v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-from-frequency-table/sssss39v"/>
      <lastmod>2026-11-02T17:09:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mean-from-frequency-table/sssss39v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-from-frequency-table/sssss39v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-from-frequency-table/sssss39v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-from-frequency-table/sssss39v"/>
      <lastmod>2026-11-02T17:09:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualization-of-real-number-sets/sssss394</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualization-of-real-number-sets/sssss394"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualization-of-real-number-sets/sssss394"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualization-of-real-number-sets/sssss394"/>
      <lastmod>2026-11-02T18:48:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualization-of-real-number-sets/sssss394</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualization-of-real-number-sets/sssss394"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualization-of-real-number-sets/sssss394"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualization-of-real-number-sets/sssss394"/>
      <lastmod>2026-11-02T18:48:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-light-reflection/sssss39l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-light-reflection/sssss39l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-light-reflection/sssss39l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-light-reflection/sssss39l"/>
      <lastmod>2026-11-02T18:09:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-light-reflection/sssss39l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-light-reflection/sssss39l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-light-reflection/sssss39l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-light-reflection/sssss39l"/>
      <lastmod>2026-11-02T18:09:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-dilations-triangle/sssss39y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-dilations-triangle/sssss39y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-dilations-triangle/sssss39y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-dilations-triangle/sssss39y"/>
      <lastmod>2026-11-02T12:09:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-dilations-triangle/sssss39y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-dilations-triangle/sssss39y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-dilations-triangle/sssss39y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-dilations-triangle/sssss39y"/>
      <lastmod>2026-11-02T12:09:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-fibonacci-sequence-modulo-9/sssss39a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-fibonacci-sequence-modulo-9/sssss39a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-fibonacci-sequence-modulo-9/sssss39a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-fibonacci-sequence-modulo-9/sssss39a"/>
      <lastmod>2026-11-02T00:00:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-fibonacci-sequence-modulo-9/sssss39a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-fibonacci-sequence-modulo-9/sssss39a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-fibonacci-sequence-modulo-9/sssss39a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-fibonacci-sequence-modulo-9/sssss39a"/>
      <lastmod>2026-11-02T00:00:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-and-line-symmetry/sssss39c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-and-line-symmetry/sssss39c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-and-line-symmetry/sssss39c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-and-line-symmetry/sssss39c"/>
      <lastmod>2026-11-02T02:39:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-and-line-symmetry/sssss39c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-and-line-symmetry/sssss39c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-and-line-symmetry/sssss39c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-and-line-symmetry/sssss39c"/>
      <lastmod>2026-11-02T02:39:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dice-roll-simulation/sssss39r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dice-roll-simulation/sssss39r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dice-roll-simulation/sssss39r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dice-roll-simulation/sssss39r"/>
      <lastmod>2026-11-02T03:05:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dice-roll-simulation/sssss39r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dice-roll-simulation/sssss39r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dice-roll-simulation/sssss39r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dice-roll-simulation/sssss39r"/>
      <lastmod>2026-11-02T03:05:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/deriving-the-quadratic-formula-via-completing-the-square/sssss39h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-the-quadratic-formula-via-completing-the-square/sssss39h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-the-quadratic-formula-via-completing-the-square/sssss39h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-the-quadratic-formula-via-completing-the-square/sssss39h"/>
      <lastmod>2026-11-02T17:52:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/deriving-the-quadratic-formula-via-completing-the-square/sssss39h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-the-quadratic-formula-via-completing-the-square/sssss39h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-the-quadratic-formula-via-completing-the-square/sssss39h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-the-quadratic-formula-via-completing-the-square/sssss39h"/>
      <lastmod>2026-11-02T17:52:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-logo-x/sssss39t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-logo-x/sssss39t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-logo-x/sssss39t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-logo-x/sssss39t"/>
      <lastmod>2026-11-01T19:23:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-logo-x/sssss39t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-logo-x/sssss39t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-logo-x/sssss39t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-logo-x/sssss39t"/>
      <lastmod>2026-11-01T19:23:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-slope-form-line-drawing/sssss39x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-slope-form-line-drawing/sssss39x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-slope-form-line-drawing/sssss39x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-slope-form-line-drawing/sssss39x"/>
      <lastmod>2026-11-02T02:52:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-slope-form-line-drawing/sssss39x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-slope-form-line-drawing/sssss39x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-slope-form-line-drawing/sssss39x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-slope-form-line-drawing/sssss39x"/>
      <lastmod>2026-11-02T02:52:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-accumulation-with-constant-velocity/sssss39i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-accumulation-with-constant-velocity/sssss39i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-accumulation-with-constant-velocity/sssss39i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-accumulation-with-constant-velocity/sssss39i"/>
      <lastmod>2026-11-01T19:22:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-accumulation-with-constant-velocity/sssss39i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-accumulation-with-constant-velocity/sssss39i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-accumulation-with-constant-velocity/sssss39i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-accumulation-with-constant-velocity/sssss39i"/>
      <lastmod>2026-11-01T19:22:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-point/sssss39o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-point/sssss39o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-point/sssss39o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-point/sssss39o"/>
      <lastmod>2026-11-02T12:41:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-point/sssss39o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-point/sssss39o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-point/sssss39o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-point/sssss39o"/>
      <lastmod>2026-11-02T12:41:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directional-derivatives-and-gradient-demo/sssss3es</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivatives-and-gradient-demo/sssss3es"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivatives-and-gradient-demo/sssss3es"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivatives-and-gradient-demo/sssss3es"/>
      <lastmod>2026-11-01T20:53:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directional-derivatives-and-gradient-demo/sssss3es</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivatives-and-gradient-demo/sssss3es"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivatives-and-gradient-demo/sssss3es"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivatives-and-gradient-demo/sssss3es"/>
      <lastmod>2026-11-01T20:53:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-transformation-demo/sssss3e7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-transformation-demo/sssss3e7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-transformation-demo/sssss3e7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-transformation-demo/sssss3e7"/>
      <lastmod>2026-11-02T18:47:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-transformation-demo/sssss3e7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-transformation-demo/sssss3e7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-transformation-demo/sssss3e7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-transformation-demo/sssss3e7"/>
      <lastmod>2026-11-02T18:47:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-by-tammacooper/sssss3en</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-by-tammacooper/sssss3en"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-by-tammacooper/sssss3en"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-by-tammacooper/sssss3en"/>
      <lastmod>2026-11-02T12:24:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-by-tammacooper/sssss3en</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-by-tammacooper/sssss3en"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-by-tammacooper/sssss3en"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-by-tammacooper/sssss3en"/>
      <lastmod>2026-11-02T12:24:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visual-fibonacci-digital-root-representation/sssss3e2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-fibonacci-digital-root-representation/sssss3e2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-fibonacci-digital-root-representation/sssss3e2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-fibonacci-digital-root-representation/sssss3e2"/>
      <lastmod>2026-11-02T14:58:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visual-fibonacci-digital-root-representation/sssss3e2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-fibonacci-digital-root-representation/sssss3e2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-fibonacci-digital-root-representation/sssss3e2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-fibonacci-digital-root-representation/sssss3e2"/>
      <lastmod>2026-11-02T14:58:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diagonals-of-a-polygon-calculator/sssss3ek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-a-polygon-calculator/sssss3ek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-a-polygon-calculator/sssss3ek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-a-polygon-calculator/sssss3ek"/>
      <lastmod>2026-11-02T08:54:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diagonals-of-a-polygon-calculator/sssss3ek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-a-polygon-calculator/sssss3ek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-a-polygon-calculator/sssss3ek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-a-polygon-calculator/sssss3ek"/>
      <lastmod>2026-11-02T08:54:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-and-similarity-in-equilateral-triangles/sssss3ez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-similarity-in-equilateral-triangles/sssss3ez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-similarity-in-equilateral-triangles/sssss3ez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-similarity-in-equilateral-triangles/sssss3ez"/>
      <lastmod>2026-11-02T17:45:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-and-similarity-in-equilateral-triangles/sssss3ez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-similarity-in-equilateral-triangles/sssss3ez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-similarity-in-equilateral-triangles/sssss3ez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-similarity-in-equilateral-triangles/sssss3ez"/>
      <lastmod>2026-11-02T17:45:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truchet-tiles-quarter-circles/sssss3e0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truchet-tiles-quarter-circles/sssss3e0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truchet-tiles-quarter-circles/sssss3e0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truchet-tiles-quarter-circles/sssss3e0"/>
      <lastmod>2026-11-01T23:13:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truchet-tiles-quarter-circles/sssss3e0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truchet-tiles-quarter-circles/sssss3e0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truchet-tiles-quarter-circles/sssss3e0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truchet-tiles-quarter-circles/sssss3e0"/>
      <lastmod>2026-11-01T23:13:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/another-fractal-curve/sssss3ed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/another-fractal-curve/sssss3ed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/another-fractal-curve/sssss3ed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/another-fractal-curve/sssss3ed"/>
      <lastmod>2026-11-01T21:18:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/another-fractal-curve/sssss3ed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/another-fractal-curve/sssss3ed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/another-fractal-curve/sssss3ed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/another-fractal-curve/sssss3ed"/>
      <lastmod>2026-11-01T21:18:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-inequalities/sssss3ef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequalities/sssss3ef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequalities/sssss3ef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequalities/sssss3ef"/>
      <lastmod>2026-11-02T00:17:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-inequalities/sssss3ef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequalities/sssss3ef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequalities/sssss3ef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequalities/sssss3ef"/>
      <lastmod>2026-11-02T00:17:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/correlation-analysis-scatter-plot-and-geometric-transformations/sssss3e8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-analysis-scatter-plot-and-geometric-transformations/sssss3e8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-analysis-scatter-plot-and-geometric-transformations/sssss3e8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-analysis-scatter-plot-and-geometric-transformations/sssss3e8"/>
      <lastmod>2026-11-02T03:00:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/correlation-analysis-scatter-plot-and-geometric-transformations/sssss3e8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-analysis-scatter-plot-and-geometric-transformations/sssss3e8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-analysis-scatter-plot-and-geometric-transformations/sssss3e8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-analysis-scatter-plot-and-geometric-transformations/sssss3e8"/>
      <lastmod>2026-11-02T03:00:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/working-with-linear-equations-in-standard-form-quiz-generator-v2-a/sssss3eu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/working-with-linear-equations-in-standard-form-quiz-generator-v2-a/sssss3eu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/working-with-linear-equations-in-standard-form-quiz-generator-v2-a/sssss3eu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/working-with-linear-equations-in-standard-form-quiz-generator-v2-a/sssss3eu"/>
      <lastmod>2026-11-01T19:09:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/working-with-linear-equations-in-standard-form-quiz-generator-v2-a/sssss3eu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/working-with-linear-equations-in-standard-form-quiz-generator-v2-a/sssss3eu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/working-with-linear-equations-in-standard-form-quiz-generator-v2-a/sssss3eu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/working-with-linear-equations-in-standard-form-quiz-generator-v2-a/sssss3eu"/>
      <lastmod>2026-11-01T19:09:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-demo-integration-and-probability/sssss3e5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-integration-and-probability/sssss3e5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-demo-integration-and-probability/sssss3e5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-integration-and-probability/sssss3e5"/>
      <lastmod>2026-11-02T02:36:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-demo-integration-and-probability/sssss3e5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-integration-and-probability/sssss3e5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-demo-integration-and-probability/sssss3e5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-integration-and-probability/sssss3e5"/>
      <lastmod>2026-11-02T02:36:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualization-of-row-vectors-matrix-transformations/sssss3eb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualization-of-row-vectors-matrix-transformations/sssss3eb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualization-of-row-vectors-matrix-transformations/sssss3eb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualization-of-row-vectors-matrix-transformations/sssss3eb"/>
      <lastmod>2026-11-02T18:11:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualization-of-row-vectors-matrix-transformations/sssss3eb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualization-of-row-vectors-matrix-transformations/sssss3eb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualization-of-row-vectors-matrix-transformations/sssss3eb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualization-of-row-vectors-matrix-transformations/sssss3eb"/>
      <lastmod>2026-11-02T18:11:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-function-without-words/sssss3e3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-function-without-words/sssss3e3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-function-without-words/sssss3e3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-function-without-words/sssss3e3"/>
      <lastmod>2026-11-01T19:23:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-function-without-words/sssss3e3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-function-without-words/sssss3e3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-function-without-words/sssss3e3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-function-without-words/sssss3e3"/>
      <lastmod>2026-11-01T19:23:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-and-algebraic-addition/sssss3eq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-and-algebraic-addition/sssss3eq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-and-algebraic-addition/sssss3eq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-and-algebraic-addition/sssss3eq"/>
      <lastmod>2026-11-02T16:38:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-and-algebraic-addition/sssss3eq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-and-algebraic-addition/sssss3eq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-and-algebraic-addition/sssss3eq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-and-algebraic-addition/sssss3eq"/>
      <lastmod>2026-11-02T16:38:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-law-of-cosines-using-circle/sssss3e1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-law-of-cosines-using-circle/sssss3e1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-law-of-cosines-using-circle/sssss3e1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-law-of-cosines-using-circle/sssss3e1"/>
      <lastmod>2026-11-01T19:14:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-law-of-cosines-using-circle/sssss3e1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-law-of-cosines-using-circle/sssss3e1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-law-of-cosines-using-circle/sssss3e1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-law-of-cosines-using-circle/sssss3e1"/>
      <lastmod>2026-11-01T19:14:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogrammatic-pyramid-2-dynamic-net-and-inscribed-ellipse-exploration/sssss3em</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogrammatic-pyramid-2-dynamic-net-and-inscribed-ellipse-exploration/sssss3em"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogrammatic-pyramid-2-dynamic-net-and-inscribed-ellipse-exploration/sssss3em"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogrammatic-pyramid-2-dynamic-net-and-inscribed-ellipse-exploration/sssss3em"/>
      <lastmod>2026-11-01T19:13:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogrammatic-pyramid-2-dynamic-net-and-inscribed-ellipse-exploration/sssss3em</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogrammatic-pyramid-2-dynamic-net-and-inscribed-ellipse-exploration/sssss3em"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogrammatic-pyramid-2-dynamic-net-and-inscribed-ellipse-exploration/sssss3em"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogrammatic-pyramid-2-dynamic-net-and-inscribed-ellipse-exploration/sssss3em"/>
      <lastmod>2026-11-01T19:13:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/flower-iii-math-example/sssss3ej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/flower-iii-math-example/sssss3ej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/flower-iii-math-example/sssss3ej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/flower-iii-math-example/sssss3ej"/>
      <lastmod>2026-11-02T18:56:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/flower-iii-math-example/sssss3ej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/flower-iii-math-example/sssss3ej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/flower-iii-math-example/sssss3ej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/flower-iii-math-example/sssss3ej"/>
      <lastmod>2026-11-02T18:56:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-cmm/sssss3ep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-cmm/sssss3ep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallpaper-symmetry-group-cmm/sssss3ep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-cmm/sssss3ep"/>
      <lastmod>2026-11-02T18:00:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wallpaper-symmetry-group-cmm/sssss3ep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-cmm/sssss3ep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallpaper-symmetry-group-cmm/sssss3ep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-cmm/sssss3ep"/>
      <lastmod>2026-11-02T18:00:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/math-ii-a4-problem-geogebra-example/sssss3ew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-ii-a4-problem-geogebra-example/sssss3ew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-ii-a4-problem-geogebra-example/sssss3ew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-ii-a4-problem-geogebra-example/sssss3ew"/>
      <lastmod>2026-11-01T21:54:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/math-ii-a4-problem-geogebra-example/sssss3ew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-ii-a4-problem-geogebra-example/sssss3ew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-ii-a4-problem-geogebra-example/sssss3ew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-ii-a4-problem-geogebra-example/sssss3ew"/>
      <lastmod>2026-11-01T21:54:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/box-in-two-point-perspective/sssss3e6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-in-two-point-perspective/sssss3e6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-in-two-point-perspective/sssss3e6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-in-two-point-perspective/sssss3e6"/>
      <lastmod>2026-11-01T23:40:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/box-in-two-point-perspective/sssss3e6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-in-two-point-perspective/sssss3e6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-in-two-point-perspective/sssss3e6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-in-two-point-perspective/sssss3e6"/>
      <lastmod>2026-11-01T23:40:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/self-test-pemdas-bidmas/sssss3eg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/self-test-pemdas-bidmas/sssss3eg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/self-test-pemdas-bidmas/sssss3eg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/self-test-pemdas-bidmas/sssss3eg"/>
      <lastmod>2026-11-01T21:18:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/self-test-pemdas-bidmas/sssss3eg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/self-test-pemdas-bidmas/sssss3eg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/self-test-pemdas-bidmas/sssss3eg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/self-test-pemdas-bidmas/sssss3eg"/>
      <lastmod>2026-11-01T21:18:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-definition-of-ellipse/sssss3e9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-definition-of-ellipse/sssss3e9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-definition-of-ellipse/sssss3e9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-definition-of-ellipse/sssss3e9"/>
      <lastmod>2026-11-02T08:34:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-definition-of-ellipse/sssss3e9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-definition-of-ellipse/sssss3e9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-definition-of-ellipse/sssss3e9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-definition-of-ellipse/sssss3e9"/>
      <lastmod>2026-11-02T08:34:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-polygons-by-geogebra-team/sssss3ee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-polygons-by-geogebra-team/sssss3ee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-polygons-by-geogebra-team/sssss3ee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-polygons-by-geogebra-team/sssss3ee"/>
      <lastmod>2026-11-01T23:23:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-polygons-by-geogebra-team/sssss3ee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-polygons-by-geogebra-team/sssss3ee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-polygons-by-geogebra-team/sssss3ee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-polygons-by-geogebra-team/sssss3ee"/>
      <lastmod>2026-11-01T23:23:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-a-logistics-company-logo/sssss3ev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-a-logistics-company-logo/sssss3ev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-a-logistics-company-logo/sssss3ev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-a-logistics-company-logo/sssss3ev"/>
      <lastmod>2026-11-01T21:43:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-a-logistics-company-logo/sssss3ev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-a-logistics-company-logo/sssss3ev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-a-logistics-company-logo/sssss3ev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-a-logistics-company-logo/sssss3ev"/>
      <lastmod>2026-11-01T21:43:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-multiplication-of-natural-numbers/sssss3e4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-multiplication-of-natural-numbers/sssss3e4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-multiplication-of-natural-numbers/sssss3e4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-multiplication-of-natural-numbers/sssss3e4"/>
      <lastmod>2026-11-01T19:29:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-multiplication-of-natural-numbers/sssss3e4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-multiplication-of-natural-numbers/sssss3e4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-multiplication-of-natural-numbers/sssss3e4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-multiplication-of-natural-numbers/sssss3e4"/>
      <lastmod>2026-11-01T19:29:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identifying-linear-functions/sssss3el</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-linear-functions/sssss3el"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-linear-functions/sssss3el"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-linear-functions/sssss3el"/>
      <lastmod>2026-11-02T18:19:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identifying-linear-functions/sssss3el</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-linear-functions/sssss3el"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-linear-functions/sssss3el"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-linear-functions/sssss3el"/>
      <lastmod>2026-11-02T18:19:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planet-orbit/sssss3ey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planet-orbit/sssss3ey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planet-orbit/sssss3ey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planet-orbit/sssss3ey"/>
      <lastmod>2026-11-02T17:50:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planet-orbit/sssss3ey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planet-orbit/sssss3ey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planet-orbit/sssss3ey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planet-orbit/sssss3ey"/>
      <lastmod>2026-11-02T17:50:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-triangle-area-formulas-with-interactive-language-support/sssss3ea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-triangle-area-formulas-with-interactive-language-support/sssss3ea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-triangle-area-formulas-with-interactive-language-support/sssss3ea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-triangle-area-formulas-with-interactive-language-support/sssss3ea"/>
      <lastmod>2026-11-01T19:24:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-triangle-area-formulas-with-interactive-language-support/sssss3ea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-triangle-area-formulas-with-interactive-language-support/sssss3ea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-triangle-area-formulas-with-interactive-language-support/sssss3ea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-triangle-area-formulas-with-interactive-language-support/sssss3ea"/>
      <lastmod>2026-11-01T19:24:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinate-moves/sssss3ec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-moves/sssss3ec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-moves/sssss3ec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-moves/sssss3ec"/>
      <lastmod>2026-11-01T20:31:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinate-moves/sssss3ec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-moves/sssss3ec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-moves/sssss3ec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-moves/sssss3ec"/>
      <lastmod>2026-11-01T20:31:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/running-area-subtraction/sssss3er</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/running-area-subtraction/sssss3er"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/running-area-subtraction/sssss3er"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/running-area-subtraction/sssss3er"/>
      <lastmod>2026-11-01T23:09:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/running-area-subtraction/sssss3er</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/running-area-subtraction/sssss3er"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/running-area-subtraction/sssss3er"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/running-area-subtraction/sssss3er"/>
      <lastmod>2026-11-01T23:09:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-angle-relationship-between-two-tangents-to-a-circle/sssss3eh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-angle-relationship-between-two-tangents-to-a-circle/sssss3eh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-angle-relationship-between-two-tangents-to-a-circle/sssss3eh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-angle-relationship-between-two-tangents-to-a-circle/sssss3eh"/>
      <lastmod>2026-11-02T17:04:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-angle-relationship-between-two-tangents-to-a-circle/sssss3eh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-angle-relationship-between-two-tangents-to-a-circle/sssss3eh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-angle-relationship-between-two-tangents-to-a-circle/sssss3eh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-angle-relationship-between-two-tangents-to-a-circle/sssss3eh"/>
      <lastmod>2026-11-02T17:04:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shape-sorter/sssss3et</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shape-sorter/sssss3et"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shape-sorter/sssss3et"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shape-sorter/sssss3et"/>
      <lastmod>2026-11-02T17:03:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shape-sorter/sssss3et</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shape-sorter/sssss3et"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shape-sorter/sssss3et"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shape-sorter/sssss3et"/>
      <lastmod>2026-11-02T17:03:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coin-rolling/sssss3ex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coin-rolling/sssss3ex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coin-rolling/sssss3ex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coin-rolling/sssss3ex"/>
      <lastmod>2026-11-02T18:34:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coin-rolling/sssss3ex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coin-rolling/sssss3ex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coin-rolling/sssss3ex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coin-rolling/sssss3ex"/>
      <lastmod>2026-11-02T18:34:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximize-area-with-fixed-perimeter/sssss3ei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximize-area-with-fixed-perimeter/sssss3ei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximize-area-with-fixed-perimeter/sssss3ei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximize-area-with-fixed-perimeter/sssss3ei"/>
      <lastmod>2026-11-01T21:08:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximize-area-with-fixed-perimeter/sssss3ei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximize-area-with-fixed-perimeter/sssss3ei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximize-area-with-fixed-perimeter/sssss3ei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximize-area-with-fixed-perimeter/sssss3ei"/>
      <lastmod>2026-11-01T21:08:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/balance-game/sssss3eo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/balance-game/sssss3eo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/balance-game/sssss3eo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/balance-game/sssss3eo"/>
      <lastmod>2026-11-02T08:53:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/balance-game/sssss3eo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/balance-game/sssss3eo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/balance-game/sssss3eo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/balance-game/sssss3eo"/>
      <lastmod>2026-11-02T08:53:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-log-functions/sssss3vs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-log-functions/sssss3vs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-log-functions/sssss3vs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-log-functions/sssss3vs"/>
      <lastmod>2026-11-02T18:54:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-log-functions/sssss3vs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-log-functions/sssss3vs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-log-functions/sssss3vs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-log-functions/sssss3vs"/>
      <lastmod>2026-11-02T18:54:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-sine-wave-trace-activity/sssss3v7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-sine-wave-trace-activity/sssss3v7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-sine-wave-trace-activity/sssss3v7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-sine-wave-trace-activity/sssss3v7"/>
      <lastmod>2026-11-01T21:20:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-sine-wave-trace-activity/sssss3v7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-sine-wave-trace-activity/sssss3v7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-sine-wave-trace-activity/sssss3v7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-sine-wave-trace-activity/sssss3v7"/>
      <lastmod>2026-11-01T21:20:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-integral-upper-sum-lower-sum-and-exact-value/sssss3vn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-integral-upper-sum-lower-sum-and-exact-value/sssss3vn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-integral-upper-sum-lower-sum-and-exact-value/sssss3vn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-integral-upper-sum-lower-sum-and-exact-value/sssss3vn"/>
      <lastmod>2026-11-01T22:05:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-integral-upper-sum-lower-sum-and-exact-value/sssss3vn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-integral-upper-sum-lower-sum-and-exact-value/sssss3vn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-integral-upper-sum-lower-sum-and-exact-value/sssss3vn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-integral-upper-sum-lower-sum-and-exact-value/sssss3vn"/>
      <lastmod>2026-11-01T22:05:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integration-by-substitution-demo/sssss3v2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-by-substitution-demo/sssss3v2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-by-substitution-demo/sssss3v2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-by-substitution-demo/sssss3v2"/>
      <lastmod>2026-11-01T20:45:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integration-by-substitution-demo/sssss3v2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-by-substitution-demo/sssss3v2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-by-substitution-demo/sssss3v2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-by-substitution-demo/sssss3v2"/>
      <lastmod>2026-11-01T20:45:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gradient-of-exponential-functions/sssss3vk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-of-exponential-functions/sssss3vk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-of-exponential-functions/sssss3vk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-of-exponential-functions/sssss3vk"/>
      <lastmod>2026-11-02T18:11:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gradient-of-exponential-functions/sssss3vk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-of-exponential-functions/sssss3vk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-of-exponential-functions/sssss3vk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-of-exponential-functions/sssss3vk"/>
      <lastmod>2026-11-02T18:11:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hinged-dissection-dodecahedron-to-two-cubes/sssss3vz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hinged-dissection-dodecahedron-to-two-cubes/sssss3vz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hinged-dissection-dodecahedron-to-two-cubes/sssss3vz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hinged-dissection-dodecahedron-to-two-cubes/sssss3vz"/>
      <lastmod>2026-11-02T17:11:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hinged-dissection-dodecahedron-to-two-cubes/sssss3vz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hinged-dissection-dodecahedron-to-two-cubes/sssss3vz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hinged-dissection-dodecahedron-to-two-cubes/sssss3vz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hinged-dissection-dodecahedron-to-two-cubes/sssss3vz"/>
      <lastmod>2026-11-02T17:11:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone-by-norm-prokup/sssss3v0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-norm-prokup/sssss3v0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by-norm-prokup/sssss3v0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-norm-prokup/sssss3v0"/>
      <lastmod>2026-11-02T18:00:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cone-by-norm-prokup/sssss3v0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-norm-prokup/sssss3v0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by-norm-prokup/sssss3v0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-norm-prokup/sssss3v0"/>
      <lastmod>2026-11-02T18:00:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-and-trigonometric-functions/sssss3vd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-and-trigonometric-functions/sssss3vd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-and-trigonometric-functions/sssss3vd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-and-trigonometric-functions/sssss3vd"/>
      <lastmod>2026-11-02T18:13:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-and-trigonometric-functions/sssss3vd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-and-trigonometric-functions/sssss3vd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-and-trigonometric-functions/sssss3vd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-and-trigonometric-functions/sssss3vd"/>
      <lastmod>2026-11-02T18:13:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone-by-daryl-cox/sssss3vf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-daryl-cox/sssss3vf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by-daryl-cox/sssss3vf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-daryl-cox/sssss3vf"/>
      <lastmod>2026-11-02T09:47:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cone-by-daryl-cox/sssss3vf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-daryl-cox/sssss3vf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by-daryl-cox/sssss3vf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-daryl-cox/sssss3vf"/>
      <lastmod>2026-11-02T09:47:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integral-with-partial-fractions-visualizing-the-integration-process/sssss3v8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integral-with-partial-fractions-visualizing-the-integration-process/sssss3v8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integral-with-partial-fractions-visualizing-the-integration-process/sssss3v8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integral-with-partial-fractions-visualizing-the-integration-process/sssss3v8"/>
      <lastmod>2026-11-01T19:12:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integral-with-partial-fractions-visualizing-the-integration-process/sssss3v8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integral-with-partial-fractions-visualizing-the-integration-process/sssss3v8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integral-with-partial-fractions-visualizing-the-integration-process/sssss3v8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integral-with-partial-fractions-visualizing-the-integration-process/sssss3v8"/>
      <lastmod>2026-11-01T19:12:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-discovery-dynamic-construction-of-non-vertical-lines/sssss3vu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-discovery-dynamic-construction-of-non-vertical-lines/sssss3vu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-discovery-dynamic-construction-of-non-vertical-lines/sssss3vu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-discovery-dynamic-construction-of-non-vertical-lines/sssss3vu"/>
      <lastmod>2026-11-02T02:24:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-discovery-dynamic-construction-of-non-vertical-lines/sssss3vu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-discovery-dynamic-construction-of-non-vertical-lines/sssss3vu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-discovery-dynamic-construction-of-non-vertical-lines/sssss3vu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-discovery-dynamic-construction-of-non-vertical-lines/sssss3vu"/>
      <lastmod>2026-11-02T02:24:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/betty-s-quincena-era-two-representations-of-a-ratio-strip-diagram-and-double/sssss3v5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/betty-s-quincena-era-two-representations-of-a-ratio-strip-diagram-and-double/sssss3v5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/betty-s-quincena-era-two-representations-of-a-ratio-strip-diagram-and-double/sssss3v5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/betty-s-quincena-era-two-representations-of-a-ratio-strip-diagram-and-double/sssss3v5"/>
      <lastmod>2026-11-01T22:09:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/betty-s-quincena-era-two-representations-of-a-ratio-strip-diagram-and-double/sssss3v5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/betty-s-quincena-era-two-representations-of-a-ratio-strip-diagram-and-double/sssss3v5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/betty-s-quincena-era-two-representations-of-a-ratio-strip-diagram-and-double/sssss3v5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/betty-s-quincena-era-two-representations-of-a-ratio-strip-diagram-and-double/sssss3v5"/>
      <lastmod>2026-11-01T22:09:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-transformation-and-congruence/sssss3vb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-transformation-and-congruence/sssss3vb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-transformation-and-congruence/sssss3vb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-transformation-and-congruence/sssss3vb"/>
      <lastmod>2026-11-02T00:53:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-transformation-and-congruence/sssss3vb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-transformation-and-congruence/sssss3vb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-transformation-and-congruence/sssss3vb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-transformation-and-congruence/sssss3vb"/>
      <lastmod>2026-11-02T00:53:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equation-of-plane-given-a-point-and-two-vectors/sssss3v3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-plane-given-a-point-and-two-vectors/sssss3v3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-plane-given-a-point-and-two-vectors/sssss3v3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-plane-given-a-point-and-two-vectors/sssss3v3"/>
      <lastmod>2026-11-02T16:56:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equation-of-plane-given-a-point-and-two-vectors/sssss3v3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-plane-given-a-point-and-two-vectors/sssss3v3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-plane-given-a-point-and-two-vectors/sssss3v3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-plane-given-a-point-and-two-vectors/sssss3v3"/>
      <lastmod>2026-11-02T16:56:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-section-drawing-prism/sssss3vq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-drawing-prism/sssss3vq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-drawing-prism/sssss3vq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-drawing-prism/sssss3vq"/>
      <lastmod>2026-11-02T16:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-section-drawing-prism/sssss3vq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-drawing-prism/sssss3vq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-drawing-prism/sssss3vq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-drawing-prism/sssss3vq"/>
      <lastmod>2026-11-02T16:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dodecahedron/sssss3v1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dodecahedron/sssss3v1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dodecahedron/sssss3v1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dodecahedron/sssss3v1"/>
      <lastmod>2026-11-01T23:23:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dodecahedron/sssss3v1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dodecahedron/sssss3v1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dodecahedron/sssss3v1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dodecahedron/sssss3v1"/>
      <lastmod>2026-11-01T23:23:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-equations-with-geometric-construction/sssss3vm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-with-geometric-construction/sssss3vm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-with-geometric-construction/sssss3vm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-with-geometric-construction/sssss3vm"/>
      <lastmod>2026-11-02T02:18:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-equations-with-geometric-construction/sssss3vm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-with-geometric-construction/sssss3vm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-with-geometric-construction/sssss3vm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-with-geometric-construction/sssss3vm"/>
      <lastmod>2026-11-02T02:18:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-construction-of-dodecahedral-pentagonal-prisms/sssss3vj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-construction-of-dodecahedral-pentagonal-prisms/sssss3vj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-construction-of-dodecahedral-pentagonal-prisms/sssss3vj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-construction-of-dodecahedral-pentagonal-prisms/sssss3vj"/>
      <lastmod>2026-11-02T18:33:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-construction-of-dodecahedral-pentagonal-prisms/sssss3vj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-construction-of-dodecahedral-pentagonal-prisms/sssss3vj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-construction-of-dodecahedral-pentagonal-prisms/sssss3vj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-construction-of-dodecahedral-pentagonal-prisms/sssss3vj"/>
      <lastmod>2026-11-02T18:33:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/projections-from-3d-object-to-2d-plane/sssss3vp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projections-from-3d-object-to-2d-plane/sssss3vp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projections-from-3d-object-to-2d-plane/sssss3vp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projections-from-3d-object-to-2d-plane/sssss3vp"/>
      <lastmod>2026-11-01T22:00:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/projections-from-3d-object-to-2d-plane/sssss3vp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projections-from-3d-object-to-2d-plane/sssss3vp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projections-from-3d-object-to-2d-plane/sssss3vp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projections-from-3d-object-to-2d-plane/sssss3vp"/>
      <lastmod>2026-11-01T22:00:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-polygon-construction-example-by-amber/sssss3vw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-polygon-construction-example-by-amber/sssss3vw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-polygon-construction-example-by-amber/sssss3vw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-polygon-construction-example-by-amber/sssss3vw"/>
      <lastmod>2026-11-01T23:58:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-polygon-construction-example-by-amber/sssss3vw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-polygon-construction-example-by-amber/sssss3vw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-polygon-construction-example-by-amber/sssss3vw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-polygon-construction-example-by-amber/sssss3vw"/>
      <lastmod>2026-11-01T23:58:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visual-sequence-generator-v3/sssss3v6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-sequence-generator-v3/sssss3v6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-sequence-generator-v3/sssss3v6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-sequence-generator-v3/sssss3v6"/>
      <lastmod>2026-11-02T15:37:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visual-sequence-generator-v3/sssss3v6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-sequence-generator-v3/sssss3v6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-sequence-generator-v3/sssss3v6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-sequence-generator-v3/sssss3v6"/>
      <lastmod>2026-11-02T15:37:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-purple-parabola-and-function-properties/sssss3vg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-purple-parabola-and-function-properties/sssss3vg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-purple-parabola-and-function-properties/sssss3vg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-purple-parabola-and-function-properties/sssss3vg"/>
      <lastmod>2026-11-02T17:14:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-purple-parabola-and-function-properties/sssss3vg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-purple-parabola-and-function-properties/sssss3vg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-purple-parabola-and-function-properties/sssss3vg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-purple-parabola-and-function-properties/sssss3vg"/>
      <lastmod>2026-11-02T17:14:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/magic-seven-times-tables/sssss3v9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magic-seven-times-tables/sssss3v9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magic-seven-times-tables/sssss3v9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magic-seven-times-tables/sssss3v9"/>
      <lastmod>2026-11-01T19:13:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/magic-seven-times-tables/sssss3v9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magic-seven-times-tables/sssss3v9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magic-seven-times-tables/sssss3v9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magic-seven-times-tables/sssss3v9"/>
      <lastmod>2026-11-01T19:13:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/colored-sinusoidal-surface/sssss3ve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/colored-sinusoidal-surface/sssss3ve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/colored-sinusoidal-surface/sssss3ve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/colored-sinusoidal-surface/sssss3ve"/>
      <lastmod>2026-11-01T19:18:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/colored-sinusoidal-surface/sssss3ve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/colored-sinusoidal-surface/sssss3ve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/colored-sinusoidal-surface/sssss3ve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/colored-sinusoidal-surface/sssss3ve"/>
      <lastmod>2026-11-01T19:18:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-quantity-comparison/sssss3vv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-quantity-comparison/sssss3vv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-quantity-comparison/sssss3vv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-quantity-comparison/sssss3vv"/>
      <lastmod>2026-11-01T23:35:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-quantity-comparison/sssss3vv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-quantity-comparison/sssss3vv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-quantity-comparison/sssss3vv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-quantity-comparison/sssss3vv"/>
      <lastmod>2026-11-01T23:35:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temperature-scatter-plot/sssss3v4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-scatter-plot/sssss3v4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-scatter-plot/sssss3v4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-scatter-plot/sssss3v4"/>
      <lastmod>2026-11-02T17:01:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temperature-scatter-plot/sssss3v4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-scatter-plot/sssss3v4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-scatter-plot/sssss3v4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-scatter-plot/sssss3v4"/>
      <lastmod>2026-11-02T17:01:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-by-corybenson/sssss3vl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-by-corybenson/sssss3vl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-by-corybenson/sssss3vl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-by-corybenson/sssss3vl"/>
      <lastmod>2026-11-02T03:15:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-by-corybenson/sssss3vl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-by-corybenson/sssss3vl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-by-corybenson/sssss3vl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-by-corybenson/sssss3vl"/>
      <lastmod>2026-11-02T03:15:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry/sssss3vy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry/sssss3vy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-transformational-geometry/sssss3vy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry/sssss3vy"/>
      <lastmod>2026-11-01T19:12:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-transformational-geometry/sssss3vy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry/sssss3vy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-transformational-geometry/sssss3vy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry/sssss3vy"/>
      <lastmod>2026-11-01T19:12:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-properties-illustrated/sssss3va</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-illustrated/sssss3va"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-illustrated/sssss3va"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-illustrated/sssss3va"/>
      <lastmod>2026-11-02T02:58:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-properties-illustrated/sssss3va</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-illustrated/sssss3va"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-illustrated/sssss3va"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-illustrated/sssss3va"/>
      <lastmod>2026-11-02T02:58:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-y-a-f-x-graph/sssss3vc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-y-a-f-x-graph/sssss3vc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-y-a-f-x-graph/sssss3vc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-y-a-f-x-graph/sssss3vc"/>
      <lastmod>2026-11-02T11:52:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-y-a-f-x-graph/sssss3vc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-y-a-f-x-graph/sssss3vc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-y-a-f-x-graph/sssss3vc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-y-a-f-x-graph/sssss3vc"/>
      <lastmod>2026-11-02T11:52:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoids-and-polygons-construction/sssss3vr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoids-and-polygons-construction/sssss3vr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoids-and-polygons-construction/sssss3vr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoids-and-polygons-construction/sssss3vr"/>
      <lastmod>2026-11-02T17:17:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoids-and-polygons-construction/sssss3vr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoids-and-polygons-construction/sssss3vr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoids-and-polygons-construction/sssss3vr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoids-and-polygons-construction/sssss3vr"/>
      <lastmod>2026-11-02T17:17:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-and-transformation-demo/sssss3vh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-and-transformation-demo/sssss3vh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-and-transformation-demo/sssss3vh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-and-transformation-demo/sssss3vh"/>
      <lastmod>2026-11-01T19:23:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-and-transformation-demo/sssss3vh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-and-transformation-demo/sssss3vh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-and-transformation-demo/sssss3vh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-and-transformation-demo/sssss3vh"/>
      <lastmod>2026-11-01T19:23:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unlock-unknown-values-with-linear-equations/sssss3vt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unlock-unknown-values-with-linear-equations/sssss3vt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unlock-unknown-values-with-linear-equations/sssss3vt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unlock-unknown-values-with-linear-equations/sssss3vt"/>
      <lastmod>2026-11-02T09:34:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unlock-unknown-values-with-linear-equations/sssss3vt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unlock-unknown-values-with-linear-equations/sssss3vt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unlock-unknown-values-with-linear-equations/sssss3vt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unlock-unknown-values-with-linear-equations/sssss3vt"/>
      <lastmod>2026-11-02T09:34:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-intersection/sssss3vx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-intersection/sssss3vx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-intersection/sssss3vx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-intersection/sssss3vx"/>
      <lastmod>2026-11-02T02:26:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-intersection/sssss3vx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-intersection/sssss3vx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-intersection/sssss3vx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-intersection/sssss3vx"/>
      <lastmod>2026-11-02T02:26:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-segment-dilation-demo/sssss3vi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-dilation-demo/sssss3vi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-dilation-demo/sssss3vi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-dilation-demo/sssss3vi"/>
      <lastmod>2026-11-01T21:11:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-segment-dilation-demo/sssss3vi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-dilation-demo/sssss3vi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-dilation-demo/sssss3vi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-dilation-demo/sssss3vi"/>
      <lastmod>2026-11-01T21:11:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tritan-rep-tile-substitution-pattern/sssss3vo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tritan-rep-tile-substitution-pattern/sssss3vo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tritan-rep-tile-substitution-pattern/sssss3vo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tritan-rep-tile-substitution-pattern/sssss3vo"/>
      <lastmod>2026-11-01T22:11:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tritan-rep-tile-substitution-pattern/sssss3vo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tritan-rep-tile-substitution-pattern/sssss3vo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tritan-rep-tile-substitution-pattern/sssss3vo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tritan-rep-tile-substitution-pattern/sssss3vo"/>
      <lastmod>2026-11-01T22:11:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unequal-probability-demo/sssss34s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unequal-probability-demo/sssss34s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unequal-probability-demo/sssss34s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unequal-probability-demo/sssss34s"/>
      <lastmod>2026-11-02T03:11:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unequal-probability-demo/sssss34s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unequal-probability-demo/sssss34s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unequal-probability-demo/sssss34s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unequal-probability-demo/sssss34s"/>
      <lastmod>2026-11-02T03:11:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-plane-to-a-surface/sssss347</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-plane-to-a-surface/sssss347"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-plane-to-a-surface/sssss347"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-plane-to-a-surface/sssss347"/>
      <lastmod>2026-11-02T02:46:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-plane-to-a-surface/sssss347</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-plane-to-a-surface/sssss347"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-plane-to-a-surface/sssss347"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-plane-to-a-surface/sssss347"/>
      <lastmod>2026-11-02T02:46:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-dance-of-the-terrestrial-planets-animated-parametric-curves-and-geometric-t/sssss34n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-dance-of-the-terrestrial-planets-animated-parametric-curves-and-geometric-t/sssss34n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-dance-of-the-terrestrial-planets-animated-parametric-curves-and-geometric-t/sssss34n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-dance-of-the-terrestrial-planets-animated-parametric-curves-and-geometric-t/sssss34n"/>
      <lastmod>2026-11-01T20:47:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-dance-of-the-terrestrial-planets-animated-parametric-curves-and-geometric-t/sssss34n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-dance-of-the-terrestrial-planets-animated-parametric-curves-and-geometric-t/sssss34n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-dance-of-the-terrestrial-planets-animated-parametric-curves-and-geometric-t/sssss34n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-dance-of-the-terrestrial-planets-animated-parametric-curves-and-geometric-t/sssss34n"/>
      <lastmod>2026-11-01T20:47:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-multiplication-demonstration/sssss342</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-demonstration/sssss342"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-demonstration/sssss342"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-demonstration/sssss342"/>
      <lastmod>2026-11-01T21:28:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-multiplication-demonstration/sssss342</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-demonstration/sssss342"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-demonstration/sssss342"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-demonstration/sssss342"/>
      <lastmod>2026-11-01T21:28:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratics-practice-vertex-root-standard-v1/sssss34k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratics-practice-vertex-root-standard-v1/sssss34k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratics-practice-vertex-root-standard-v1/sssss34k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratics-practice-vertex-root-standard-v1/sssss34k"/>
      <lastmod>2026-11-01T23:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratics-practice-vertex-root-standard-v1/sssss34k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratics-practice-vertex-root-standard-v1/sssss34k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratics-practice-vertex-root-standard-v1/sssss34k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratics-practice-vertex-root-standard-v1/sssss34k"/>
      <lastmod>2026-11-01T23:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbolic-function-and-hyperbola-graph-relationship/sssss34z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolic-function-and-hyperbola-graph-relationship/sssss34z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolic-function-and-hyperbola-graph-relationship/sssss34z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolic-function-and-hyperbola-graph-relationship/sssss34z"/>
      <lastmod>2026-11-01T20:51:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbolic-function-and-hyperbola-graph-relationship/sssss34z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolic-function-and-hyperbola-graph-relationship/sssss34z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolic-function-and-hyperbola-graph-relationship/sssss34z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolic-function-and-hyperbola-graph-relationship/sssss34z"/>
      <lastmod>2026-11-01T20:51:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-subtraction-geometric-demonstration/sssss340</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-geometric-demonstration/sssss340"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-geometric-demonstration/sssss340"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-geometric-demonstration/sssss340"/>
      <lastmod>2026-11-02T09:33:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-subtraction-geometric-demonstration/sssss340</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-geometric-demonstration/sssss340"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-geometric-demonstration/sssss340"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-geometric-demonstration/sssss340"/>
      <lastmod>2026-11-02T09:33:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-rhombus-and-square/sssss34d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-rhombus-and-square/sssss34d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-rhombus-and-square/sssss34d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-rhombus-and-square/sssss34d"/>
      <lastmod>2026-11-02T12:21:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-rhombus-and-square/sssss34d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-rhombus-and-square/sssss34d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-rhombus-and-square/sssss34d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-rhombus-and-square/sssss34d"/>
      <lastmod>2026-11-02T12:21:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-multiplying-by-powers-of-10/sssss34f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-multiplying-by-powers-of-10/sssss34f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-multiplying-by-powers-of-10/sssss34f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-multiplying-by-powers-of-10/sssss34f"/>
      <lastmod>2026-11-01T19:30:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-multiplying-by-powers-of-10/sssss34f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-multiplying-by-powers-of-10/sssss34f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-multiplying-by-powers-of-10/sssss34f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-multiplying-by-powers-of-10/sssss34f"/>
      <lastmod>2026-11-01T19:30:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sird-model-plotting/sssss348</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sird-model-plotting/sssss348"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sird-model-plotting/sssss348"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sird-model-plotting/sssss348"/>
      <lastmod>2026-11-01T20:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sird-model-plotting/sssss348</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sird-model-plotting/sssss348"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sird-model-plotting/sssss348"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sird-model-plotting/sssss348"/>
      <lastmod>2026-11-01T20:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-associations-interactive-random-circles-and-geometric-probability/sssss34u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-associations-interactive-random-circles-and-geometric-probability/sssss34u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-associations-interactive-random-circles-and-geometric-probability/sssss34u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-associations-interactive-random-circles-and-geometric-probability/sssss34u"/>
      <lastmod>2026-11-01T19:03:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-associations-interactive-random-circles-and-geometric-probability/sssss34u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-associations-interactive-random-circles-and-geometric-probability/sssss34u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-associations-interactive-random-circles-and-geometric-probability/sssss34u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-associations-interactive-random-circles-and-geometric-probability/sssss34u"/>
      <lastmod>2026-11-01T19:03:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-degrees-by-stephen-george/sssss345</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-degrees-by-stephen-george/sssss345"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-values-on-the-unit-circle-degrees-by-stephen-george/sssss345"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-degrees-by-stephen-george/sssss345"/>
      <lastmod>2026-11-01T21:13:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exact-values-on-the-unit-circle-degrees-by-stephen-george/sssss345</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-degrees-by-stephen-george/sssss345"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-values-on-the-unit-circle-degrees-by-stephen-george/sssss345"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-degrees-by-stephen-george/sssss345"/>
      <lastmod>2026-11-01T21:13:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-equations-using-slope-y-intercept-by-elisabeth-bade/sssss34b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-using-slope-y-intercept-by-elisabeth-bade/sssss34b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-using-slope-y-intercept-by-elisabeth-bade/sssss34b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-using-slope-y-intercept-by-elisabeth-bade/sssss34b"/>
      <lastmod>2026-11-02T18:27:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-equations-using-slope-y-intercept-by-elisabeth-bade/sssss34b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-using-slope-y-intercept-by-elisabeth-bade/sssss34b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-using-slope-y-intercept-by-elisabeth-bade/sssss34b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-using-slope-y-intercept-by-elisabeth-bade/sssss34b"/>
      <lastmod>2026-11-02T18:27:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proportionality-picture/sssss343</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proportionality-picture/sssss343"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proportionality-picture/sssss343"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proportionality-picture/sssss343"/>
      <lastmod>2026-11-02T18:13:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proportionality-picture/sssss343</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proportionality-picture/sssss343"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proportionality-picture/sssss343"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proportionality-picture/sssss343"/>
      <lastmod>2026-11-02T18:13:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/long-division-practice-by-lookang/sssss34q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/long-division-practice-by-lookang/sssss34q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/long-division-practice-by-lookang/sssss34q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/long-division-practice-by-lookang/sssss34q"/>
      <lastmod>2026-11-02T13:16:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/long-division-practice-by-lookang/sssss34q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/long-division-practice-by-lookang/sssss34q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/long-division-practice-by-lookang/sssss34q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/long-division-practice-by-lookang/sssss34q"/>
      <lastmod>2026-11-02T13:16:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-benita/sssss341</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-benita/sssss341"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rectangular-prism-by-benita/sssss341"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-benita/sssss341"/>
      <lastmod>2026-11-02T12:40:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-rectangular-prism-by-benita/sssss341</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-benita/sssss341"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rectangular-prism-by-benita/sssss341"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism-by-benita/sssss341"/>
      <lastmod>2026-11-02T12:40:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-shape-demo/sssss34m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-shape-demo/sssss34m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-shape-demo/sssss34m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-shape-demo/sssss34m"/>
      <lastmod>2026-11-02T18:01:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-shape-demo/sssss34m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-shape-demo/sssss34m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-shape-demo/sssss34m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-shape-demo/sssss34m"/>
      <lastmod>2026-11-02T18:01:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compound-interest-calculation-by-lee-w-fisher/sssss34j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compound-interest-calculation-by-lee-w-fisher/sssss34j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compound-interest-calculation-by-lee-w-fisher/sssss34j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compound-interest-calculation-by-lee-w-fisher/sssss34j"/>
      <lastmod>2026-11-01T23:46:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compound-interest-calculation-by-lee-w-fisher/sssss34j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compound-interest-calculation-by-lee-w-fisher/sssss34j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compound-interest-calculation-by-lee-w-fisher/sssss34j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compound-interest-calculation-by-lee-w-fisher/sssss34j"/>
      <lastmod>2026-11-01T23:46:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spongebob-similarity-transformations/sssss34p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spongebob-similarity-transformations/sssss34p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spongebob-similarity-transformations/sssss34p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spongebob-similarity-transformations/sssss34p"/>
      <lastmod>2026-11-02T13:37:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spongebob-similarity-transformations/sssss34p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spongebob-similarity-transformations/sssss34p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spongebob-similarity-transformations/sssss34p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spongebob-similarity-transformations/sssss34p"/>
      <lastmod>2026-11-02T13:37:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/harmonic-mean-demonstration/sssss34w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harmonic-mean-demonstration/sssss34w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harmonic-mean-demonstration/sssss34w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harmonic-mean-demonstration/sssss34w"/>
      <lastmod>2026-11-02T18:38:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/harmonic-mean-demonstration/sssss34w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harmonic-mean-demonstration/sssss34w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harmonic-mean-demonstration/sssss34w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harmonic-mean-demonstration/sssss34w"/>
      <lastmod>2026-11-02T18:38:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prime-numbers-visualization/sssss346</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prime-numbers-visualization/sssss346"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prime-numbers-visualization/sssss346"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prime-numbers-visualization/sssss346"/>
      <lastmod>2026-11-02T00:17:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prime-numbers-visualization/sssss346</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prime-numbers-visualization/sssss346"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prime-numbers-visualization/sssss346"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prime-numbers-visualization/sssss346"/>
      <lastmod>2026-11-02T00:17:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-solution-of-simultaneous-linear-equations/sssss34g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-solution-of-simultaneous-linear-equations/sssss34g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-solution-of-simultaneous-linear-equations/sssss34g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-solution-of-simultaneous-linear-equations/sssss34g"/>
      <lastmod>2026-11-01T20:48:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-solution-of-simultaneous-linear-equations/sssss34g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-solution-of-simultaneous-linear-equations/sssss34g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-solution-of-simultaneous-linear-equations/sssss34g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-solution-of-simultaneous-linear-equations/sssss34g"/>
      <lastmod>2026-11-01T20:48:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-exploration/sssss349</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-exploration/sssss349"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-exploration/sssss349"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-exploration/sssss349"/>
      <lastmod>2026-11-02T02:32:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-exploration/sssss349</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-exploration/sssss349"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-exploration/sssss349"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-exploration/sssss349"/>
      <lastmod>2026-11-02T02:32:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagoras-theorem-model/sssss34e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-model/sssss34e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-theorem-model/sssss34e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-model/sssss34e"/>
      <lastmod>2026-11-01T21:28:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagoras-theorem-model/sssss34e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-model/sssss34e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-theorem-model/sssss34e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-model/sssss34e"/>
      <lastmod>2026-11-01T21:28:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/refraction-and-total-internal-reflection/sssss34v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/refraction-and-total-internal-reflection/sssss34v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/refraction-and-total-internal-reflection/sssss34v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/refraction-and-total-internal-reflection/sssss34v"/>
      <lastmod>2026-11-02T16:42:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/refraction-and-total-internal-reflection/sssss34v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/refraction-and-total-internal-reflection/sssss34v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/refraction-and-total-internal-reflection/sssss34v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/refraction-and-total-internal-reflection/sssss34v"/>
      <lastmod>2026-11-02T16:42:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-worksheet-geometric-construction-and-properties/sssss344</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-worksheet-geometric-construction-and-properties/sssss344"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-worksheet-geometric-construction-and-properties/sssss344"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-worksheet-geometric-construction-and-properties/sssss344"/>
      <lastmod>2026-11-02T18:45:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-worksheet-geometric-construction-and-properties/sssss344</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-worksheet-geometric-construction-and-properties/sssss344"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-worksheet-geometric-construction-and-properties/sssss344"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-worksheet-geometric-construction-and-properties/sssss344"/>
      <lastmod>2026-11-02T18:45:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-reflections/sssss34l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-reflections/sssss34l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-reflections/sssss34l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-reflections/sssss34l"/>
      <lastmod>2026-11-01T21:11:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-reflections/sssss34l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-reflections/sssss34l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-reflections/sssss34l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-reflections/sssss34l"/>
      <lastmod>2026-11-01T21:11:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/experimental-probability-spinner-by-aedamar-frawley/sssss34y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/experimental-probability-spinner-by-aedamar-frawley/sssss34y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/experimental-probability-spinner-by-aedamar-frawley/sssss34y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/experimental-probability-spinner-by-aedamar-frawley/sssss34y"/>
      <lastmod>2026-11-02T18:26:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/experimental-probability-spinner-by-aedamar-frawley/sssss34y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/experimental-probability-spinner-by-aedamar-frawley/sssss34y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/experimental-probability-spinner-by-aedamar-frawley/sssss34y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/experimental-probability-spinner-by-aedamar-frawley/sssss34y"/>
      <lastmod>2026-11-02T18:26:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/long-division-demo/sssss34a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/long-division-demo/sssss34a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/long-division-demo/sssss34a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/long-division-demo/sssss34a"/>
      <lastmod>2026-11-01T23:31:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/long-division-demo/sssss34a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/long-division-demo/sssss34a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/long-division-demo/sssss34a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/long-division-demo/sssss34a"/>
      <lastmod>2026-11-01T23:31:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mhf4ub-finding-function-intersections/sssss34c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mhf4ub-finding-function-intersections/sssss34c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mhf4ub-finding-function-intersections/sssss34c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mhf4ub-finding-function-intersections/sssss34c"/>
      <lastmod>2026-11-02T14:49:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mhf4ub-finding-function-intersections/sssss34c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mhf4ub-finding-function-intersections/sssss34c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mhf4ub-finding-function-intersections/sssss34c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mhf4ub-finding-function-intersections/sssss34c"/>
      <lastmod>2026-11-02T14:49:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-functions-dynamic-exploration-of-parameter-effects/sssss34r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-dynamic-exploration-of-parameter-effects/sssss34r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-dynamic-exploration-of-parameter-effects/sssss34r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-dynamic-exploration-of-parameter-effects/sssss34r"/>
      <lastmod>2026-11-02T08:51:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-functions-dynamic-exploration-of-parameter-effects/sssss34r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-dynamic-exploration-of-parameter-effects/sssss34r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-dynamic-exploration-of-parameter-effects/sssss34r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-dynamic-exploration-of-parameter-effects/sssss34r"/>
      <lastmod>2026-11-02T08:51:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/log-log-point-coordinates-construction/sssss34h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/log-log-point-coordinates-construction/sssss34h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/log-log-point-coordinates-construction/sssss34h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/log-log-point-coordinates-construction/sssss34h"/>
      <lastmod>2026-11-02T03:02:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/log-log-point-coordinates-construction/sssss34h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/log-log-point-coordinates-construction/sssss34h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/log-log-point-coordinates-construction/sssss34h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/log-log-point-coordinates-construction/sssss34h"/>
      <lastmod>2026-11-02T03:02:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eigenvalues-eigenvectors-and-fibonacci-differential-equation/sssss34t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenvalues-eigenvectors-and-fibonacci-differential-equation/sssss34t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenvalues-eigenvectors-and-fibonacci-differential-equation/sssss34t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenvalues-eigenvectors-and-fibonacci-differential-equation/sssss34t"/>
      <lastmod>2026-11-01T19:18:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eigenvalues-eigenvectors-and-fibonacci-differential-equation/sssss34t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenvalues-eigenvectors-and-fibonacci-differential-equation/sssss34t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenvalues-eigenvectors-and-fibonacci-differential-equation/sssss34t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenvalues-eigenvectors-and-fibonacci-differential-equation/sssss34t"/>
      <lastmod>2026-11-01T19:18:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diagonals-of-a-rectangle-by-jb-harrington/sssss34x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-a-rectangle-by-jb-harrington/sssss34x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-a-rectangle-by-jb-harrington/sssss34x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-a-rectangle-by-jb-harrington/sssss34x"/>
      <lastmod>2026-11-01T21:13:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diagonals-of-a-rectangle-by-jb-harrington/sssss34x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-a-rectangle-by-jb-harrington/sssss34x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-a-rectangle-by-jb-harrington/sssss34x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-a-rectangle-by-jb-harrington/sssss34x"/>
      <lastmod>2026-11-01T21:13:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-parallelogram-and-related-rectangle/sssss34i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-and-related-rectangle/sssss34i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-parallelogram-and-related-rectangle/sssss34i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-and-related-rectangle/sssss34i"/>
      <lastmod>2026-11-02T13:37:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-parallelogram-and-related-rectangle/sssss34i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-and-related-rectangle/sssss34i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-parallelogram-and-related-rectangle/sssss34i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-and-related-rectangle/sssss34i"/>
      <lastmod>2026-11-02T13:37:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph/sssss34o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph/sssss34o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-cosine-graph/sssss34o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph/sssss34o"/>
      <lastmod>2026-11-01T21:28:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-cosine-graph/sssss34o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph/sssss34o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-cosine-graph/sssss34o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph/sssss34o"/>
      <lastmod>2026-11-01T21:28:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pursuit-curve-triangle/sssss3ls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pursuit-curve-triangle/sssss3ls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pursuit-curve-triangle/sssss3ls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pursuit-curve-triangle/sssss3ls"/>
      <lastmod>2026-11-02T00:15:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pursuit-curve-triangle/sssss3ls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pursuit-curve-triangle/sssss3ls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pursuit-curve-triangle/sssss3ls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pursuit-curve-triangle/sssss3ls"/>
      <lastmod>2026-11-02T00:15:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximum-area-of-tangent-parabola-in-triangle/sssss3l7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-area-of-tangent-parabola-in-triangle/sssss3l7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-area-of-tangent-parabola-in-triangle/sssss3l7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-area-of-tangent-parabola-in-triangle/sssss3l7"/>
      <lastmod>2026-11-02T17:36:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximum-area-of-tangent-parabola-in-triangle/sssss3l7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-area-of-tangent-parabola-in-triangle/sssss3l7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-area-of-tangent-parabola-in-triangle/sssss3l7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-area-of-tangent-parabola-in-triangle/sssss3l7"/>
      <lastmod>2026-11-02T17:36:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-8/sssss3ln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-8/sssss3ln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-8/sssss3ln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-8/sssss3ln"/>
      <lastmod>2026-11-02T17:44:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-8/sssss3ln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-8/sssss3ln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-8/sssss3ln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-8/sssss3ln"/>
      <lastmod>2026-11-02T17:44:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-planes-by-tkh/sssss3l2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-planes-by-tkh/sssss3l2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-planes-by-tkh/sssss3l2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-planes-by-tkh/sssss3l2"/>
      <lastmod>2026-11-02T02:43:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-planes-by-tkh/sssss3l2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-planes-by-tkh/sssss3l2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-planes-by-tkh/sssss3l2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-planes-by-tkh/sssss3l2"/>
      <lastmod>2026-11-02T02:43:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partitioning-a-line-segment/sssss3lk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partitioning-a-line-segment/sssss3lk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partitioning-a-line-segment/sssss3lk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partitioning-a-line-segment/sssss3lk"/>
      <lastmod>2026-11-01T21:53:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partitioning-a-line-segment/sssss3lk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partitioning-a-line-segment/sssss3lk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partitioning-a-line-segment/sssss3lk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partitioning-a-line-segment/sssss3lk"/>
      <lastmod>2026-11-01T21:53:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-and-constructing-inscribed-circles/sssss3lz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-and-constructing-inscribed-circles/sssss3lz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-and-constructing-inscribed-circles/sssss3lz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-and-constructing-inscribed-circles/sssss3lz"/>
      <lastmod>2026-11-01T21:28:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-and-constructing-inscribed-circles/sssss3lz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-and-constructing-inscribed-circles/sssss3lz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-and-constructing-inscribed-circles/sssss3lz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-and-constructing-inscribed-circles/sssss3lz"/>
      <lastmod>2026-11-01T21:28:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-derivatives-and-tangent-plane-of-a-function/sssss3l0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivatives-and-tangent-plane-of-a-function/sssss3l0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivatives-and-tangent-plane-of-a-function/sssss3l0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivatives-and-tangent-plane-of-a-function/sssss3l0"/>
      <lastmod>2026-11-02T02:35:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-derivatives-and-tangent-plane-of-a-function/sssss3l0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivatives-and-tangent-plane-of-a-function/sssss3l0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivatives-and-tangent-plane-of-a-function/sssss3l0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivatives-and-tangent-plane-of-a-function/sssss3l0"/>
      <lastmod>2026-11-02T02:35:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equation-slope-y-intercept-demo/sssss3ld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-slope-y-intercept-demo/sssss3ld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-slope-y-intercept-demo/sssss3ld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-slope-y-intercept-demo/sssss3ld"/>
      <lastmod>2026-11-02T18:43:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equation-slope-y-intercept-demo/sssss3ld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-slope-y-intercept-demo/sssss3ld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-slope-y-intercept-demo/sssss3ld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-slope-y-intercept-demo/sssss3ld"/>
      <lastmod>2026-11-02T18:43:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-of-an-angle-half-chord-and-vertical-projection/sssss3lf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-of-an-angle-half-chord-and-vertical-projection/sssss3lf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-of-an-angle-half-chord-and-vertical-projection/sssss3lf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-of-an-angle-half-chord-and-vertical-projection/sssss3lf"/>
      <lastmod>2026-11-02T17:51:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-of-an-angle-half-chord-and-vertical-projection/sssss3lf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-of-an-angle-half-chord-and-vertical-projection/sssss3lf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-of-an-angle-half-chord-and-vertical-projection/sssss3lf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-of-an-angle-half-chord-and-vertical-projection/sssss3lf"/>
      <lastmod>2026-11-02T17:51:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-its-geometric-connections/sssss3l8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-its-geometric-connections/sssss3l8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-its-geometric-connections/sssss3l8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-its-geometric-connections/sssss3l8"/>
      <lastmod>2026-11-01T19:29:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-its-geometric-connections/sssss3l8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-its-geometric-connections/sssss3l8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-its-geometric-connections/sssss3l8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-its-geometric-connections/sssss3l8"/>
      <lastmod>2026-11-01T19:29:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisector-of-chord/sssss3lu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-of-chord/sssss3lu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-of-chord/sssss3lu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-of-chord/sssss3lu"/>
      <lastmod>2026-11-01T20:49:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisector-of-chord/sssss3lu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-of-chord/sssss3lu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-of-chord/sssss3lu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-of-chord/sssss3lu"/>
      <lastmod>2026-11-01T20:49:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prisms-activity/sssss3l5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prisms-activity/sssss3l5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prisms-activity/sssss3l5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prisms-activity/sssss3l5"/>
      <lastmod>2026-11-02T12:00:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prisms-activity/sssss3l5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prisms-activity/sssss3l5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prisms-activity/sssss3l5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prisms-activity/sssss3l5"/>
      <lastmod>2026-11-02T12:00:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-function-lines-dynamic-demo/sssss3lb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-function-lines-dynamic-demo/sssss3lb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-function-lines-dynamic-demo/sssss3lb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-function-lines-dynamic-demo/sssss3lb"/>
      <lastmod>2026-11-02T09:54:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-function-lines-dynamic-demo/sssss3lb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-function-lines-dynamic-demo/sssss3lb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-function-lines-dynamic-demo/sssss3lb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-function-lines-dynamic-demo/sssss3lb"/>
      <lastmod>2026-11-02T09:54:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basketball-parabolas-example/sssss3l3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basketball-parabolas-example/sssss3l3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basketball-parabolas-example/sssss3l3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basketball-parabolas-example/sssss3l3"/>
      <lastmod>2026-11-02T17:42:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basketball-parabolas-example/sssss3l3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basketball-parabolas-example/sssss3l3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basketball-parabolas-example/sssss3l3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basketball-parabolas-example/sssss3l3"/>
      <lastmod>2026-11-02T17:42:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prime-numbers-practice/sssss3lq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prime-numbers-practice/sssss3lq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prime-numbers-practice/sssss3lq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prime-numbers-practice/sssss3lq"/>
      <lastmod>2026-11-02T16:32:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prime-numbers-practice/sssss3lq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prime-numbers-practice/sssss3lq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prime-numbers-practice/sssss3lq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prime-numbers-practice/sssss3lq"/>
      <lastmod>2026-11-02T16:32:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/always-a-parallelogram/sssss3l1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/always-a-parallelogram/sssss3l1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/always-a-parallelogram/sssss3l1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/always-a-parallelogram/sssss3l1"/>
      <lastmod>2026-11-02T15:55:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/always-a-parallelogram/sssss3l1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/always-a-parallelogram/sssss3l1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/always-a-parallelogram/sssss3l1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/always-a-parallelogram/sssss3l1"/>
      <lastmod>2026-11-02T15:55:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dot-product/sssss3lm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dot-product/sssss3lm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dot-product/sssss3lm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dot-product/sssss3lm"/>
      <lastmod>2026-11-01T19:16:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dot-product/sssss3lm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dot-product/sssss3lm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dot-product/sssss3lm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dot-product/sssss3lm"/>
      <lastmod>2026-11-01T19:16:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/duality-of-hyperbolic-cosh-and-cos-functions/sssss3lj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/duality-of-hyperbolic-cosh-and-cos-functions/sssss3lj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/duality-of-hyperbolic-cosh-and-cos-functions/sssss3lj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/duality-of-hyperbolic-cosh-and-cos-functions/sssss3lj"/>
      <lastmod>2026-11-02T08:39:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/duality-of-hyperbolic-cosh-and-cos-functions/sssss3lj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/duality-of-hyperbolic-cosh-and-cos-functions/sssss3lj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/duality-of-hyperbolic-cosh-and-cos-functions/sssss3lj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/duality-of-hyperbolic-cosh-and-cos-functions/sssss3lj"/>
      <lastmod>2026-11-02T08:39:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-acute-angles-in-right-triangles-using-inverse-trig-functions/sssss3lp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-acute-angles-in-right-triangles-using-inverse-trig-functions/sssss3lp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-acute-angles-in-right-triangles-using-inverse-trig-functions/sssss3lp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-acute-angles-in-right-triangles-using-inverse-trig-functions/sssss3lp"/>
      <lastmod>2026-11-01T21:43:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-acute-angles-in-right-triangles-using-inverse-trig-functions/sssss3lp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-acute-angles-in-right-triangles-using-inverse-trig-functions/sssss3lp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-acute-angles-in-right-triangles-using-inverse-trig-functions/sssss3lp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-acute-angles-in-right-triangles-using-inverse-trig-functions/sssss3lp"/>
      <lastmod>2026-11-01T21:43:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-why-hcf-determines-squares-fitting-a-rectangle/sssss3lw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-why-hcf-determines-squares-fitting-a-rectangle/sssss3lw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-why-hcf-determines-squares-fitting-a-rectangle/sssss3lw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-why-hcf-determines-squares-fitting-a-rectangle/sssss3lw"/>
      <lastmod>2026-11-01T20:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-why-hcf-determines-squares-fitting-a-rectangle/sssss3lw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-why-hcf-determines-squares-fitting-a-rectangle/sssss3lw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-why-hcf-determines-squares-fitting-a-rectangle/sssss3lw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-why-hcf-determines-squares-fitting-a-rectangle/sssss3lw"/>
      <lastmod>2026-11-01T20:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr-2/sssss3l6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr-2/sssss3l6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-matrix-by-chris-cambr-2/sssss3l6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr-2/sssss3l6"/>
      <lastmod>2026-11-02T18:44:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connectivity-matrix-by-chris-cambr-2/sssss3l6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr-2/sssss3l6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-matrix-by-chris-cambr-2/sssss3l6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr-2/sssss3l6"/>
      <lastmod>2026-11-02T18:44:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-warmup/sssss3lg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-warmup/sssss3lg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-warmup/sssss3lg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-warmup/sssss3lg"/>
      <lastmod>2026-11-02T13:13:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-warmup/sssss3lg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-warmup/sssss3lg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-warmup/sssss3lg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-warmup/sssss3lg"/>
      <lastmod>2026-11-02T13:13:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation-by-ukasz-krysiak/sssss3l9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation-by-ukasz-krysiak/sssss3l9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-subtraction-simulation-by-ukasz-krysiak/sssss3l9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation-by-ukasz-krysiak/sssss3l9"/>
      <lastmod>2026-11-01T23:12:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-and-subtraction-simulation-by-ukasz-krysiak/sssss3l9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation-by-ukasz-krysiak/sssss3l9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-subtraction-simulation-by-ukasz-krysiak/sssss3l9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation-by-ukasz-krysiak/sssss3l9"/>
      <lastmod>2026-11-01T23:12:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones/sssss3le</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones/sssss3le"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exploration-by-barbara-e-jones/sssss3le"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones/sssss3le"/>
      <lastmod>2026-11-02T02:59:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-exploration-by-barbara-e-jones/sssss3le</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones/sssss3le"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exploration-by-barbara-e-jones/sssss3le"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones/sssss3le"/>
      <lastmod>2026-11-02T02:59:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prime-number-family-members/sssss3lv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prime-number-family-members/sssss3lv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prime-number-family-members/sssss3lv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prime-number-family-members/sssss3lv"/>
      <lastmod>2026-11-02T14:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prime-number-family-members/sssss3lv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prime-number-family-members/sssss3lv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prime-number-family-members/sssss3lv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prime-number-family-members/sssss3lv"/>
      <lastmod>2026-11-02T14:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distances-on-a-logarithmic-scale/sssss3l4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distances-on-a-logarithmic-scale/sssss3l4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distances-on-a-logarithmic-scale/sssss3l4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distances-on-a-logarithmic-scale/sssss3l4"/>
      <lastmod>2026-11-01T21:39:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distances-on-a-logarithmic-scale/sssss3l4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distances-on-a-logarithmic-scale/sssss3l4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distances-on-a-logarithmic-scale/sssss3l4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distances-on-a-logarithmic-scale/sssss3l4"/>
      <lastmod>2026-11-01T21:39:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/creating-a-surface-between-two-curves/sssss3ll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-a-surface-between-two-curves/sssss3ll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-a-surface-between-two-curves/sssss3ll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-a-surface-between-two-curves/sssss3ll"/>
      <lastmod>2026-11-02T18:50:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/creating-a-surface-between-two-curves/sssss3ll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-a-surface-between-two-curves/sssss3ll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-a-surface-between-two-curves/sssss3ll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-a-surface-between-two-curves/sssss3ll"/>
      <lastmod>2026-11-02T18:50:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/same-side-exterior-angles-interactive-investigation/sssss3ly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-side-exterior-angles-interactive-investigation/sssss3ly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-side-exterior-angles-interactive-investigation/sssss3ly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-side-exterior-angles-interactive-investigation/sssss3ly"/>
      <lastmod>2026-11-02T15:53:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/same-side-exterior-angles-interactive-investigation/sssss3ly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-side-exterior-angles-interactive-investigation/sssss3ly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-side-exterior-angles-interactive-investigation/sssss3ly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-side-exterior-angles-interactive-investigation/sssss3ly"/>
      <lastmod>2026-11-02T15:53:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-chris-cambr/sssss3la</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-chris-cambr/sssss3la"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-of-a-triangle-by-chris-cambr/sssss3la"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-chris-cambr/sssss3la"/>
      <lastmod>2026-11-02T16:50:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumcenter-of-a-triangle-by-chris-cambr/sssss3la</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-chris-cambr/sssss3la"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-of-a-triangle-by-chris-cambr/sssss3la"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-chris-cambr/sssss3la"/>
      <lastmod>2026-11-02T16:50:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-area-and-parallelogram-area-relationship/sssss3lc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-and-parallelogram-area-relationship/sssss3lc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-and-parallelogram-area-relationship/sssss3lc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-and-parallelogram-area-relationship/sssss3lc"/>
      <lastmod>2026-11-02T10:57:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-area-and-parallelogram-area-relationship/sssss3lc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-and-parallelogram-area-relationship/sssss3lc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-and-parallelogram-area-relationship/sssss3lc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-and-parallelogram-area-relationship/sssss3lc"/>
      <lastmod>2026-11-02T10:57:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-one-fifth-of-15/sssss3lr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-one-fifth-of-15/sssss3lr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-one-fifth-of-15/sssss3lr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-one-fifth-of-15/sssss3lr"/>
      <lastmod>2026-11-02T18:52:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-one-fifth-of-15/sssss3lr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-one-fifth-of-15/sssss3lr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-one-fifth-of-15/sssss3lr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-one-fifth-of-15/sssss3lr"/>
      <lastmod>2026-11-02T18:52:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-in-a-conic/sssss3lh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-a-conic/sssss3lh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-a-conic/sssss3lh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-a-conic/sssss3lh"/>
      <lastmod>2026-11-01T20:42:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-in-a-conic/sssss3lh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-a-conic/sssss3lh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-a-conic/sssss3lh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-a-conic/sssss3lh"/>
      <lastmod>2026-11-01T20:42:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/toblerone-modeling-question-for-algebra-geometry-and-calculus/sssss3lt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/toblerone-modeling-question-for-algebra-geometry-and-calculus/sssss3lt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/toblerone-modeling-question-for-algebra-geometry-and-calculus/sssss3lt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/toblerone-modeling-question-for-algebra-geometry-and-calculus/sssss3lt"/>
      <lastmod>2026-11-02T18:25:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/toblerone-modeling-question-for-algebra-geometry-and-calculus/sssss3lt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/toblerone-modeling-question-for-algebra-geometry-and-calculus/sssss3lt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/toblerone-modeling-question-for-algebra-geometry-and-calculus/sssss3lt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/toblerone-modeling-question-for-algebra-geometry-and-calculus/sssss3lt"/>
      <lastmod>2026-11-02T18:25:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tidal-accelerations-to-scale/sssss3lx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tidal-accelerations-to-scale/sssss3lx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tidal-accelerations-to-scale/sssss3lx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tidal-accelerations-to-scale/sssss3lx"/>
      <lastmod>2026-11-01T21:03:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tidal-accelerations-to-scale/sssss3lx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tidal-accelerations-to-scale/sssss3lx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tidal-accelerations-to-scale/sssss3lx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tidal-accelerations-to-scale/sssss3lx"/>
      <lastmod>2026-11-01T21:03:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-net-by-mrs-simon/sssss3li</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net-by-mrs-simon/sssss3li"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net-by-mrs-simon/sssss3li"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net-by-mrs-simon/sssss3li"/>
      <lastmod>2026-11-02T12:24:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-net-by-mrs-simon/sssss3li</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net-by-mrs-simon/sssss3li"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net-by-mrs-simon/sssss3li"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net-by-mrs-simon/sssss3li"/>
      <lastmod>2026-11-02T12:24:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-dimensions-demonstration/sssss3lo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-dimensions-demonstration/sssss3lo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-dimensions-demonstration/sssss3lo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-dimensions-demonstration/sssss3lo"/>
      <lastmod>2026-11-02T16:45:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-dimensions-demonstration/sssss3lo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-dimensions-demonstration/sssss3lo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-dimensions-demonstration/sssss3lo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-dimensions-demonstration/sssss3lo"/>
      <lastmod>2026-11-02T16:45:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/t-distribution-confidence-intervals-and-tests/sssss3ys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/t-distribution-confidence-intervals-and-tests/sssss3ys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/t-distribution-confidence-intervals-and-tests/sssss3ys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/t-distribution-confidence-intervals-and-tests/sssss3ys"/>
      <lastmod>2026-11-01T23:55:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/t-distribution-confidence-intervals-and-tests/sssss3ys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/t-distribution-confidence-intervals-and-tests/sssss3ys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/t-distribution-confidence-intervals-and-tests/sssss3ys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/t-distribution-confidence-intervals-and-tests/sssss3ys"/>
      <lastmod>2026-11-01T23:55:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/approximating-the-area-under-a-curve-by-erik-jacobsen/sssss3y7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-the-area-under-a-curve-by-erik-jacobsen/sssss3y7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-the-area-under-a-curve-by-erik-jacobsen/sssss3y7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-the-area-under-a-curve-by-erik-jacobsen/sssss3y7"/>
      <lastmod>2026-11-02T18:42:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/approximating-the-area-under-a-curve-by-erik-jacobsen/sssss3y7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-the-area-under-a-curve-by-erik-jacobsen/sssss3y7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-the-area-under-a-curve-by-erik-jacobsen/sssss3y7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-the-area-under-a-curve-by-erik-jacobsen/sssss3y7"/>
      <lastmod>2026-11-02T18:42:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-mean-and-standard-deviation/sssss3yn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-mean-and-standard-deviation/sssss3yn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-mean-and-standard-deviation/sssss3yn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-mean-and-standard-deviation/sssss3yn"/>
      <lastmod>2026-11-02T03:16:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-mean-and-standard-deviation/sssss3yn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-mean-and-standard-deviation/sssss3yn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-mean-and-standard-deviation/sssss3yn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-mean-and-standard-deviation/sssss3yn"/>
      <lastmod>2026-11-02T03:16:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-and-gcd-lcm-geometric-construction/sssss3y2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-gcd-lcm-geometric-construction/sssss3y2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-gcd-lcm-geometric-construction/sssss3y2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-gcd-lcm-geometric-construction/sssss3y2"/>
      <lastmod>2026-11-02T18:18:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-and-gcd-lcm-geometric-construction/sssss3y2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-gcd-lcm-geometric-construction/sssss3y2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-gcd-lcm-geometric-construction/sssss3y2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-gcd-lcm-geometric-construction/sssss3y2"/>
      <lastmod>2026-11-02T18:18:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/butterbaugh-3d-sphere/sssss3yk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/butterbaugh-3d-sphere/sssss3yk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/butterbaugh-3d-sphere/sssss3yk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/butterbaugh-3d-sphere/sssss3yk"/>
      <lastmod>2026-11-02T18:15:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/butterbaugh-3d-sphere/sssss3yk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/butterbaugh-3d-sphere/sssss3yk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/butterbaugh-3d-sphere/sssss3yk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/butterbaugh-3d-sphere/sssss3yk"/>
      <lastmod>2026-11-02T18:15:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/harmonic-addition-1/sssss3yz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harmonic-addition-1/sssss3yz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harmonic-addition-1/sssss3yz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harmonic-addition-1/sssss3yz"/>
      <lastmod>2026-11-02T09:01:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/harmonic-addition-1/sssss3yz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harmonic-addition-1/sssss3yz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harmonic-addition-1/sssss3yz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harmonic-addition-1/sssss3yz"/>
      <lastmod>2026-11-02T09:01:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-by-ian-cantley/sssss3y0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-by-ian-cantley/sssss3y0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-by-ian-cantley/sssss3y0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-by-ian-cantley/sssss3y0"/>
      <lastmod>2026-11-02T00:19:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-by-ian-cantley/sssss3y0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-by-ian-cantley/sssss3y0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-by-ian-cantley/sssss3y0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-by-ian-cantley/sssss3y0"/>
      <lastmod>2026-11-02T00:19:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-a-formative-assessment-resource-with-instant-feedback-in-geogebra/sssss3yd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-formative-assessment-resource-with-instant-feedback-in-geogebra/sssss3yd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-formative-assessment-resource-with-instant-feedback-in-geogebra/sssss3yd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-formative-assessment-resource-with-instant-feedback-in-geogebra/sssss3yd"/>
      <lastmod>2026-11-02T02:50:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-a-formative-assessment-resource-with-instant-feedback-in-geogebra/sssss3yd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-formative-assessment-resource-with-instant-feedback-in-geogebra/sssss3yd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-formative-assessment-resource-with-instant-feedback-in-geogebra/sssss3yd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-formative-assessment-resource-with-instant-feedback-in-geogebra/sssss3yd"/>
      <lastmod>2026-11-02T02:50:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-problem/sssss3yf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-problem/sssss3yf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-problem/sssss3yf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-problem/sssss3yf"/>
      <lastmod>2026-11-01T19:09:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-problem/sssss3yf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-problem/sssss3yf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-problem/sssss3yf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-problem/sssss3yf"/>
      <lastmod>2026-11-01T19:09:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equilateral-triangles-between-curves/sssss3y8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangles-between-curves/sssss3y8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangles-between-curves/sssss3y8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangles-between-curves/sssss3y8"/>
      <lastmod>2026-11-01T19:26:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equilateral-triangles-between-curves/sssss3y8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangles-between-curves/sssss3y8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangles-between-curves/sssss3y8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangles-between-curves/sssss3y8"/>
      <lastmod>2026-11-01T19:26:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/movement-of-a-bug-on-a-toothpaste-box/sssss3yu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/movement-of-a-bug-on-a-toothpaste-box/sssss3yu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/movement-of-a-bug-on-a-toothpaste-box/sssss3yu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/movement-of-a-bug-on-a-toothpaste-box/sssss3yu"/>
      <lastmod>2026-11-01T21:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/movement-of-a-bug-on-a-toothpaste-box/sssss3yu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/movement-of-a-bug-on-a-toothpaste-box/sssss3yu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/movement-of-a-bug-on-a-toothpaste-box/sssss3yu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/movement-of-a-bug-on-a-toothpaste-box/sssss3yu"/>
      <lastmod>2026-11-01T21:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-of-a-triangle-by-alexandra-buskirk/sssss3y5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-of-a-triangle-by-alexandra-buskirk/sssss3y5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-of-a-triangle-by-alexandra-buskirk/sssss3y5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-of-a-triangle-by-alexandra-buskirk/sssss3y5"/>
      <lastmod>2026-11-01T23:13:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-of-a-triangle-by-alexandra-buskirk/sssss3y5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-of-a-triangle-by-alexandra-buskirk/sssss3y5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-of-a-triangle-by-alexandra-buskirk/sssss3y5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-of-a-triangle-by-alexandra-buskirk/sssss3y5"/>
      <lastmod>2026-11-01T23:13:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-algebra-probability-statistics-example/sssss3yb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-algebra-probability-statistics-example/sssss3yb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-algebra-probability-statistics-example/sssss3yb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-algebra-probability-statistics-example/sssss3yb"/>
      <lastmod>2026-11-02T12:41:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-algebra-probability-statistics-example/sssss3yb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-algebra-probability-statistics-example/sssss3yb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-algebra-probability-statistics-example/sssss3yb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-algebra-probability-statistics-example/sssss3yb"/>
      <lastmod>2026-11-02T12:41:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eccentricity-proof/sssss3y3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eccentricity-proof/sssss3y3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eccentricity-proof/sssss3y3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eccentricity-proof/sssss3y3"/>
      <lastmod>2026-11-01T20:45:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eccentricity-proof/sssss3y3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eccentricity-proof/sssss3y3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eccentricity-proof/sssss3y3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eccentricity-proof/sssss3y3"/>
      <lastmod>2026-11-01T20:45:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-on-the-number-line/sssss3yq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-on-the-number-line/sssss3yq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-on-the-number-line/sssss3yq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-on-the-number-line/sssss3yq"/>
      <lastmod>2026-11-01T23:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-on-the-number-line/sssss3yq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-on-the-number-line/sssss3yq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-on-the-number-line/sssss3yq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-on-the-number-line/sssss3yq"/>
      <lastmod>2026-11-01T23:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/powers-of-complex-numbers/sssss3y1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers/sssss3y1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/powers-of-complex-numbers/sssss3y1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers/sssss3y1"/>
      <lastmod>2026-11-01T19:08:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/powers-of-complex-numbers/sssss3y1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers/sssss3y1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/powers-of-complex-numbers/sssss3y1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers/sssss3y1"/>
      <lastmod>2026-11-01T19:08:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-whole-numbers/sssss3ym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-whole-numbers/sssss3ym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-whole-numbers/sssss3ym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-whole-numbers/sssss3ym"/>
      <lastmod>2026-11-02T17:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-whole-numbers/sssss3ym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-whole-numbers/sssss3ym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-whole-numbers/sssss3ym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-whole-numbers/sssss3ym"/>
      <lastmod>2026-11-02T17:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/confidence-interval-calculation-demo/sssss3yj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-calculation-demo/sssss3yj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-calculation-demo/sssss3yj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-calculation-demo/sssss3yj"/>
      <lastmod>2026-11-02T02:56:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/confidence-interval-calculation-demo/sssss3yj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-calculation-demo/sssss3yj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-calculation-demo/sssss3yj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-calculation-demo/sssss3yj"/>
      <lastmod>2026-11-02T02:56:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-6-18-practice-subtraction-in-equivalent-expressions/sssss3yp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-6-18-practice-subtraction-in-equivalent-expressions/sssss3yp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-6-18-practice-subtraction-in-equivalent-expressions/sssss3yp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-6-18-practice-subtraction-in-equivalent-expressions/sssss3yp"/>
      <lastmod>2026-11-01T22:54:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-6-18-practice-subtraction-in-equivalent-expressions/sssss3yp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-6-18-practice-subtraction-in-equivalent-expressions/sssss3yp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-6-18-practice-subtraction-in-equivalent-expressions/sssss3yp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-6-18-practice-subtraction-in-equivalent-expressions/sssss3yp"/>
      <lastmod>2026-11-01T22:54:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-fractions-exploration/sssss3yw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-exploration/sssss3yw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-exploration/sssss3yw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-exploration/sssss3yw"/>
      <lastmod>2026-11-01T20:56:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-fractions-exploration/sssss3yw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-exploration/sssss3yw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-exploration/sssss3yw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-exploration/sssss3yw"/>
      <lastmod>2026-11-01T20:56:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-method-for-simultaneous-linear-equations/sssss3y6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-method-for-simultaneous-linear-equations/sssss3y6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-method-for-simultaneous-linear-equations/sssss3y6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-method-for-simultaneous-linear-equations/sssss3y6"/>
      <lastmod>2026-11-01T23:53:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-method-for-simultaneous-linear-equations/sssss3y6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-method-for-simultaneous-linear-equations/sssss3y6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-method-for-simultaneous-linear-equations/sssss3y6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-method-for-simultaneous-linear-equations/sssss3y6"/>
      <lastmod>2026-11-01T23:53:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by/sssss3yg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by/sssss3yg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-and-logarithmic-functions-by/sssss3yg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by/sssss3yg"/>
      <lastmod>2026-11-02T02:16:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-and-logarithmic-functions-by/sssss3yg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by/sssss3yg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-and-logarithmic-functions-by/sssss3yg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by/sssss3yg"/>
      <lastmod>2026-11-02T02:16:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-squares-3d-demo/sssss3y9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-squares-3d-demo/sssss3y9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-squares-3d-demo/sssss3y9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-squares-3d-demo/sssss3y9"/>
      <lastmod>2026-11-02T13:25:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-squares-3d-demo/sssss3y9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-squares-3d-demo/sssss3y9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-squares-3d-demo/sssss3y9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-squares-3d-demo/sssss3y9"/>
      <lastmod>2026-11-02T13:25:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sierpinski-probability-tree-fractal-via-random-iteration/sssss3ye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sierpinski-probability-tree-fractal-via-random-iteration/sssss3ye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sierpinski-probability-tree-fractal-via-random-iteration/sssss3ye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sierpinski-probability-tree-fractal-via-random-iteration/sssss3ye"/>
      <lastmod>2026-11-02T18:47:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sierpinski-probability-tree-fractal-via-random-iteration/sssss3ye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sierpinski-probability-tree-fractal-via-random-iteration/sssss3ye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sierpinski-probability-tree-fractal-via-random-iteration/sssss3ye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sierpinski-probability-tree-fractal-via-random-iteration/sssss3ye"/>
      <lastmod>2026-11-02T18:47:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-construction-by-kaleb-jenkins/sssss3yv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kaleb-jenkins/sssss3yv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-by-kaleb-jenkins/sssss3yv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kaleb-jenkins/sssss3yv"/>
      <lastmod>2026-11-02T18:16:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-construction-by-kaleb-jenkins/sssss3yv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kaleb-jenkins/sssss3yv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-by-kaleb-jenkins/sssss3yv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kaleb-jenkins/sssss3yv"/>
      <lastmod>2026-11-02T18:16:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers/sssss3y4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers/sssss3y4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-of-directed-numbers/sssss3y4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers/sssss3y4"/>
      <lastmod>2026-11-01T20:58:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtraction-of-directed-numbers/sssss3y4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers/sssss3y4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-of-directed-numbers/sssss3y4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers/sssss3y4"/>
      <lastmod>2026-11-01T20:58:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-shortest-path-1/sssss3yl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-shortest-path-1/sssss3yl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-shortest-path-1/sssss3yl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-shortest-path-1/sssss3yl"/>
      <lastmod>2026-11-02T16:50:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-shortest-path-1/sssss3yl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-shortest-path-1/sssss3yl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-shortest-path-1/sssss3yl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-shortest-path-1/sssss3yl"/>
      <lastmod>2026-11-02T16:50:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-complex-numbers-statistical-functions-demo/sssss3yy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-complex-numbers-statistical-functions-demo/sssss3yy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-complex-numbers-statistical-functions-demo/sssss3yy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-complex-numbers-statistical-functions-demo/sssss3yy"/>
      <lastmod>2026-11-02T00:48:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-complex-numbers-statistical-functions-demo/sssss3yy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-complex-numbers-statistical-functions-demo/sssss3yy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-complex-numbers-statistical-functions-demo/sssss3yy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-complex-numbers-statistical-functions-demo/sssss3yy"/>
      <lastmod>2026-11-02T00:48:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/negative-integers-art-mrs-bennett/sssss3ya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-integers-art-mrs-bennett/sssss3ya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-integers-art-mrs-bennett/sssss3ya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-integers-art-mrs-bennett/sssss3ya"/>
      <lastmod>2026-11-01T21:19:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/negative-integers-art-mrs-bennett/sssss3ya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-integers-art-mrs-bennett/sssss3ya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-integers-art-mrs-bennett/sssss3ya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-integers-art-mrs-bennett/sssss3ya"/>
      <lastmod>2026-11-01T21:19:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-differentiation/sssss3yc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-differentiation/sssss3yc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-differentiation/sssss3yc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-differentiation/sssss3yc"/>
      <lastmod>2026-11-01T20:55:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-differentiation/sssss3yc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-differentiation/sssss3yc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-differentiation/sssss3yc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-differentiation/sssss3yc"/>
      <lastmod>2026-11-01T20:55:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-cosine-tangent-simulator/sssss3yr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-tangent-simulator/sssss3yr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-cosine-tangent-simulator/sssss3yr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-cosine-tangent-simulator/sssss3yr"/>
      <lastmod>2026-11-01T23:11:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-cosine-tangent-simulator/sssss3yr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-tangent-simulator/sssss3yr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-cosine-tangent-simulator/sssss3yr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-cosine-tangent-simulator/sssss3yr"/>
      <lastmod>2026-11-01T23:11:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-a-curve-on-a-cone-and-a-sphere/sssss3yh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-curve-on-a-cone-and-a-sphere/sssss3yh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-curve-on-a-cone-and-a-sphere/sssss3yh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-curve-on-a-cone-and-a-sphere/sssss3yh"/>
      <lastmod>2026-11-02T17:55:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-a-curve-on-a-cone-and-a-sphere/sssss3yh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-curve-on-a-cone-and-a-sphere/sssss3yh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-curve-on-a-cone-and-a-sphere/sssss3yh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-curve-on-a-cone-and-a-sphere/sssss3yh"/>
      <lastmod>2026-11-02T17:55:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relationship-between-numbers-and-circle/sssss3yt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-numbers-and-circle/sssss3yt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-numbers-and-circle/sssss3yt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-numbers-and-circle/sssss3yt"/>
      <lastmod>2026-11-02T16:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relationship-between-numbers-and-circle/sssss3yt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-numbers-and-circle/sssss3yt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-numbers-and-circle/sssss3yt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-numbers-and-circle/sssss3yt"/>
      <lastmod>2026-11-02T16:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inverse-function-and-derivative/sssss3yx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-function-and-derivative/sssss3yx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-function-and-derivative/sssss3yx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-function-and-derivative/sssss3yx"/>
      <lastmod>2026-11-01T20:53:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inverse-function-and-derivative/sssss3yx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-function-and-derivative/sssss3yx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-function-and-derivative/sssss3yx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-function-and-derivative/sssss3yx"/>
      <lastmod>2026-11-01T20:53:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-parabola-shifts-demo/sssss3yi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-parabola-shifts-demo/sssss3yi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-parabola-shifts-demo/sssss3yi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-parabola-shifts-demo/sssss3yi"/>
      <lastmod>2026-11-02T17:05:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-parabola-shifts-demo/sssss3yi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-parabola-shifts-demo/sssss3yi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-parabola-shifts-demo/sssss3yi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-parabola-shifts-demo/sssss3yi"/>
      <lastmod>2026-11-02T17:05:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-quadrilateral-problem/sssss3yo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-quadrilateral-problem/sssss3yo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-quadrilateral-problem/sssss3yo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-quadrilateral-problem/sssss3yo"/>
      <lastmod>2026-11-02T17:42:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-quadrilateral-problem/sssss3yo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-quadrilateral-problem/sssss3yo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-quadrilateral-problem/sssss3yo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-quadrilateral-problem/sssss3yo"/>
      <lastmod>2026-11-02T17:42:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-complex-roots-of-parabola/sssss3as</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-complex-roots-of-parabola/sssss3as"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-complex-roots-of-parabola/sssss3as"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-complex-roots-of-parabola/sssss3as"/>
      <lastmod>2026-11-02T00:47:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-complex-roots-of-parabola/sssss3as</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-complex-roots-of-parabola/sssss3as"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-complex-roots-of-parabola/sssss3as"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-complex-roots-of-parabola/sssss3as"/>
      <lastmod>2026-11-02T00:47:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-paige26998/sssss3a7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-paige26998/sssss3a7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter-by-paige26998/sssss3a7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-paige26998/sssss3a7"/>
      <lastmod>2026-11-01T23:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter-by-paige26998/sssss3a7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-paige26998/sssss3a7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter-by-paige26998/sssss3a7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-paige26998/sssss3a7"/>
      <lastmod>2026-11-01T23:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-diagrams-visualizing-function-mappings-with-similar-triangles-and-tran/sssss3an</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-diagrams-visualizing-function-mappings-with-similar-triangles-and-tran/sssss3an"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-diagrams-visualizing-function-mappings-with-similar-triangles-and-tran/sssss3an"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-diagrams-visualizing-function-mappings-with-similar-triangles-and-tran/sssss3an"/>
      <lastmod>2026-11-02T00:49:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-diagrams-visualizing-function-mappings-with-similar-triangles-and-tran/sssss3an</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-diagrams-visualizing-function-mappings-with-similar-triangles-and-tran/sssss3an"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-diagrams-visualizing-function-mappings-with-similar-triangles-and-tran/sssss3an"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-diagrams-visualizing-function-mappings-with-similar-triangles-and-tran/sssss3an"/>
      <lastmod>2026-11-02T00:49:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-properties-illustrated-by-mrs-cole/sssss3a2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-illustrated-by-mrs-cole/sssss3a2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-illustrated-by-mrs-cole/sssss3a2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-illustrated-by-mrs-cole/sssss3a2"/>
      <lastmod>2026-11-02T18:28:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-properties-illustrated-by-mrs-cole/sssss3a2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-illustrated-by-mrs-cole/sssss3a2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-illustrated-by-mrs-cole/sssss3a2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-illustrated-by-mrs-cole/sssss3a2"/>
      <lastmod>2026-11-02T18:28:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-parameter-a/sssss3ak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-parameter-a/sssss3ak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-parameter-a/sssss3ak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-parameter-a/sssss3ak"/>
      <lastmod>2026-11-02T15:08:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-parameter-a/sssss3ak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-parameter-a/sssss3ak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-parameter-a/sssss3ak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-parameter-a/sssss3ak"/>
      <lastmod>2026-11-02T15:08:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-cosine-tangent-0-90-interactive-visualization/sssss3az</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-tangent-0-90-interactive-visualization/sssss3az"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-cosine-tangent-0-90-interactive-visualization/sssss3az"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-cosine-tangent-0-90-interactive-visualization/sssss3az"/>
      <lastmod>2026-11-02T16:43:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-cosine-tangent-0-90-interactive-visualization/sssss3az</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-tangent-0-90-interactive-visualization/sssss3az"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-cosine-tangent-0-90-interactive-visualization/sssss3az"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-cosine-tangent-0-90-interactive-visualization/sssss3az"/>
      <lastmod>2026-11-02T16:43:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-net-construction-by-ben-roth/sssss3a0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net-construction-by-ben-roth/sssss3a0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net-construction-by-ben-roth/sssss3a0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net-construction-by-ben-roth/sssss3a0"/>
      <lastmod>2026-11-02T16:30:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-net-construction-by-ben-roth/sssss3a0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net-construction-by-ben-roth/sssss3a0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net-construction-by-ben-roth/sssss3a0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net-construction-by-ben-roth/sssss3a0"/>
      <lastmod>2026-11-02T16:30:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mei-lds-americas-math-example/sssss3ad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mei-lds-americas-math-example/sssss3ad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mei-lds-americas-math-example/sssss3ad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mei-lds-americas-math-example/sssss3ad"/>
      <lastmod>2026-11-02T16:43:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mei-lds-americas-math-example/sssss3ad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mei-lds-americas-math-example/sssss3ad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mei-lds-americas-math-example/sssss3ad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mei-lds-americas-math-example/sssss3ad"/>
      <lastmod>2026-11-02T16:43:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-properties-demo-by-david-bookston/sssss3af</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-properties-demo-by-david-bookston/sssss3af"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-properties-demo-by-david-bookston/sssss3af"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-properties-demo-by-david-bookston/sssss3af"/>
      <lastmod>2026-11-02T12:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-properties-demo-by-david-bookston/sssss3af</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-properties-demo-by-david-bookston/sssss3af"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-properties-demo-by-david-bookston/sssss3af"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-properties-demo-by-david-bookston/sssss3af"/>
      <lastmod>2026-11-02T12:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-exercises-3d-geometry-and-vector-construction/sssss3a8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-exercises-3d-geometry-and-vector-construction/sssss3a8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-exercises-3d-geometry-and-vector-construction/sssss3a8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-exercises-3d-geometry-and-vector-construction/sssss3a8"/>
      <lastmod>2026-11-02T00:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-exercises-3d-geometry-and-vector-construction/sssss3a8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-exercises-3d-geometry-and-vector-construction/sssss3a8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-exercises-3d-geometry-and-vector-construction/sssss3a8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-exercises-3d-geometry-and-vector-construction/sssss3a8"/>
      <lastmod>2026-11-02T00:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/new-ellipses-dynamic-construction-via-diameters-and-intersections/sssss3au</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-ellipses-dynamic-construction-via-diameters-and-intersections/sssss3au"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-ellipses-dynamic-construction-via-diameters-and-intersections/sssss3au"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-ellipses-dynamic-construction-via-diameters-and-intersections/sssss3au"/>
      <lastmod>2026-11-02T18:57:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/new-ellipses-dynamic-construction-via-diameters-and-intersections/sssss3au</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-ellipses-dynamic-construction-via-diameters-and-intersections/sssss3au"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-ellipses-dynamic-construction-via-diameters-and-intersections/sssss3au"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-ellipses-dynamic-construction-via-diameters-and-intersections/sssss3au"/>
      <lastmod>2026-11-02T18:57:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-magnitude-of-a-vector/sssss3a5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-magnitude-of-a-vector/sssss3a5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-magnitude-of-a-vector/sssss3a5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-magnitude-of-a-vector/sssss3a5"/>
      <lastmod>2026-11-02T18:32:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-magnitude-of-a-vector/sssss3a5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-magnitude-of-a-vector/sssss3a5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-magnitude-of-a-vector/sssss3a5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-magnitude-of-a-vector/sssss3a5"/>
      <lastmod>2026-11-02T18:32:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/baseball-game-finished/sssss3ab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baseball-game-finished/sssss3ab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baseball-game-finished/sssss3ab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baseball-game-finished/sssss3ab"/>
      <lastmod>2026-11-02T18:23:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/baseball-game-finished/sssss3ab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baseball-game-finished/sssss3ab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baseball-game-finished/sssss3ab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baseball-game-finished/sssss3ab"/>
      <lastmod>2026-11-02T18:23:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-isosceles-triangle/sssss3a3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-isosceles-triangle/sssss3a3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-isosceles-triangle/sssss3a3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-isosceles-triangle/sssss3a3"/>
      <lastmod>2026-11-02T03:15:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-isosceles-triangle/sssss3a3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-isosceles-triangle/sssss3a3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-isosceles-triangle/sssss3a3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-isosceles-triangle/sssss3a3"/>
      <lastmod>2026-11-02T03:15:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-equation-of-a-line/sssss3aq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line/sssss3aq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-equation-of-a-line/sssss3aq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line/sssss3aq"/>
      <lastmod>2026-11-01T20:50:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-equation-of-a-line/sssss3aq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line/sssss3aq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-equation-of-a-line/sssss3aq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line/sssss3aq"/>
      <lastmod>2026-11-01T20:50:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/enjoying-kepler-s-conjecture-during-breakfast-time/sssss3a1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/enjoying-kepler-s-conjecture-during-breakfast-time/sssss3a1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/enjoying-kepler-s-conjecture-during-breakfast-time/sssss3a1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/enjoying-kepler-s-conjecture-during-breakfast-time/sssss3a1"/>
      <lastmod>2026-11-01T20:44:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/enjoying-kepler-s-conjecture-during-breakfast-time/sssss3a1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/enjoying-kepler-s-conjecture-during-breakfast-time/sssss3a1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/enjoying-kepler-s-conjecture-during-breakfast-time/sssss3a1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/enjoying-kepler-s-conjecture-during-breakfast-time/sssss3a1"/>
      <lastmod>2026-11-01T20:44:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-celia-jimenez/sssss3am</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-celia-jimenez/sssss3am"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-celia-jimenez/sssss3am"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-celia-jimenez/sssss3am"/>
      <lastmod>2026-11-02T17:15:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-celia-jimenez/sssss3am</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-celia-jimenez/sssss3am"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-celia-jimenez/sssss3am"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-celia-jimenez/sssss3am"/>
      <lastmod>2026-11-02T17:15:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformation-principle-demo/sssss3aj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-principle-demo/sssss3aj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-principle-demo/sssss3aj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-principle-demo/sssss3aj"/>
      <lastmod>2026-11-02T18:36:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformation-principle-demo/sssss3aj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-principle-demo/sssss3aj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-principle-demo/sssss3aj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-principle-demo/sssss3aj"/>
      <lastmod>2026-11-02T18:36:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/am-2019-p2-q7/sssss3ap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/am-2019-p2-q7/sssss3ap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/am-2019-p2-q7/sssss3ap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/am-2019-p2-q7/sssss3ap"/>
      <lastmod>2026-11-01T20:42:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/am-2019-p2-q7/sssss3ap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/am-2019-p2-q7/sssss3ap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/am-2019-p2-q7/sssss3ap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/am-2019-p2-q7/sssss3ap"/>
      <lastmod>2026-11-01T20:42:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-absolute-value-inequalities/sssss3aw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-absolute-value-inequalities/sssss3aw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-absolute-value-inequalities/sssss3aw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-absolute-value-inequalities/sssss3aw"/>
      <lastmod>2026-11-01T23:17:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-absolute-value-inequalities/sssss3aw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-absolute-value-inequalities/sssss3aw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-absolute-value-inequalities/sssss3aw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-absolute-value-inequalities/sssss3aw"/>
      <lastmod>2026-11-01T23:17:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/support-vectors-hyperplanes/sssss3a6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/support-vectors-hyperplanes/sssss3a6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/support-vectors-hyperplanes/sssss3a6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/support-vectors-hyperplanes/sssss3a6"/>
      <lastmod>2026-11-02T02:55:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/support-vectors-hyperplanes/sssss3a6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/support-vectors-hyperplanes/sssss3a6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/support-vectors-hyperplanes/sssss3a6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/support-vectors-hyperplanes/sssss3a6"/>
      <lastmod>2026-11-02T02:55:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-large-numbers/sssss3ag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-large-numbers/sssss3ag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-large-numbers/sssss3ag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-large-numbers/sssss3ag"/>
      <lastmod>2026-11-02T17:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-large-numbers/sssss3ag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-large-numbers/sssss3ag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-large-numbers/sssss3ag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-large-numbers/sssss3ag"/>
      <lastmod>2026-11-02T17:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubic-b-zier-curve/sssss3a9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-b-zier-curve/sssss3a9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-b-zier-curve/sssss3a9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-b-zier-curve/sssss3a9"/>
      <lastmod>2026-11-01T20:39:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubic-b-zier-curve/sssss3a9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-b-zier-curve/sssss3a9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-b-zier-curve/sssss3a9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-b-zier-curve/sssss3a9"/>
      <lastmod>2026-11-01T20:39:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/absolute-value-translations/sssss3ae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/absolute-value-translations/sssss3ae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/absolute-value-translations/sssss3ae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/absolute-value-translations/sssss3ae"/>
      <lastmod>2026-11-02T08:59:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/absolute-value-translations/sssss3ae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/absolute-value-translations/sssss3ae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/absolute-value-translations/sssss3ae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/absolute-value-translations/sssss3ae"/>
      <lastmod>2026-11-02T08:59:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-without-words-the-third-power-sum/sssss3av</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-the-third-power-sum/sssss3av"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-the-third-power-sum/sssss3av"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-the-third-power-sum/sssss3av"/>
      <lastmod>2026-11-01T19:36:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-without-words-the-third-power-sum/sssss3av</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-the-third-power-sum/sssss3av"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-the-third-power-sum/sssss3av"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-the-third-power-sum/sssss3av"/>
      <lastmod>2026-11-01T19:36:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/elliptic-cylinders/sssss3a4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptic-cylinders/sssss3a4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptic-cylinders/sssss3a4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptic-cylinders/sssss3a4"/>
      <lastmod>2026-11-01T23:50:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/elliptic-cylinders/sssss3a4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptic-cylinders/sssss3a4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptic-cylinders/sssss3a4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptic-cylinders/sssss3a4"/>
      <lastmod>2026-11-01T23:50:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-integers-formative-assessment/sssss3al</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-integers-formative-assessment/sssss3al"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-integers-formative-assessment/sssss3al"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-integers-formative-assessment/sssss3al"/>
      <lastmod>2026-11-01T20:43:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-integers-formative-assessment/sssss3al</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-integers-formative-assessment/sssss3al"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-integers-formative-assessment/sssss3al"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-integers-formative-assessment/sssss3al"/>
      <lastmod>2026-11-01T20:43:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/center-of-rotation/sssss3ay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-rotation/sssss3ay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-rotation/sssss3ay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-rotation/sssss3ay"/>
      <lastmod>2026-11-01T23:39:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/center-of-rotation/sssss3ay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-rotation/sssss3ay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-rotation/sssss3ay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-rotation/sssss3ay"/>
      <lastmod>2026-11-01T23:39:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/archimedes-insight-gogeometry-action-150/sssss3aa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/archimedes-insight-gogeometry-action-150/sssss3aa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/archimedes-insight-gogeometry-action-150/sssss3aa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/archimedes-insight-gogeometry-action-150/sssss3aa"/>
      <lastmod>2026-11-02T16:38:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/archimedes-insight-gogeometry-action-150/sssss3aa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/archimedes-insight-gogeometry-action-150/sssss3aa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/archimedes-insight-gogeometry-action-150/sssss3aa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/archimedes-insight-gogeometry-action-150/sssss3aa"/>
      <lastmod>2026-11-02T16:38:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/incircle-problem-with-dynamic-illustration/sssss3ac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-problem-with-dynamic-illustration/sssss3ac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-problem-with-dynamic-illustration/sssss3ac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-problem-with-dynamic-illustration/sssss3ac"/>
      <lastmod>2026-11-02T13:14:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/incircle-problem-with-dynamic-illustration/sssss3ac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-problem-with-dynamic-illustration/sssss3ac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-problem-with-dynamic-illustration/sssss3ac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-problem-with-dynamic-illustration/sssss3ac"/>
      <lastmod>2026-11-02T13:14:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-segments-longer-or-shorter/sssss3ar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-segments-longer-or-shorter/sssss3ar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-segments-longer-or-shorter/sssss3ar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-segments-longer-or-shorter/sssss3ar"/>
      <lastmod>2026-11-01T23:17:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-segments-longer-or-shorter/sssss3ar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-segments-longer-or-shorter/sssss3ar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-segments-longer-or-shorter/sssss3ar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-segments-longer-or-shorter/sssss3ar"/>
      <lastmod>2026-11-01T23:17:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/straightedge-and-compass-constructions/sssss3ah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/straightedge-and-compass-constructions/sssss3ah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/straightedge-and-compass-constructions/sssss3ah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/straightedge-and-compass-constructions/sssss3ah"/>
      <lastmod>2026-11-02T02:13:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/straightedge-and-compass-constructions/sssss3ah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/straightedge-and-compass-constructions/sssss3ah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/straightedge-and-compass-constructions/sssss3ah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/straightedge-and-compass-constructions/sssss3ah"/>
      <lastmod>2026-11-02T02:13:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-hyperbola-transformation/sssss3at</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-hyperbola-transformation/sssss3at"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-hyperbola-transformation/sssss3at"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-hyperbola-transformation/sssss3at"/>
      <lastmod>2026-11-02T13:57:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-hyperbola-transformation/sssss3at</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-hyperbola-transformation/sssss3at"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-hyperbola-transformation/sssss3at"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-hyperbola-transformation/sssss3at"/>
      <lastmod>2026-11-02T13:57:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphs-and-correspondence-rules-2/sssss3ax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-and-correspondence-rules-2/sssss3ax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-and-correspondence-rules-2/sssss3ax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-and-correspondence-rules-2/sssss3ax"/>
      <lastmod>2026-11-02T18:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphs-and-correspondence-rules-2/sssss3ax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-and-correspondence-rules-2/sssss3ax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-and-correspondence-rules-2/sssss3ax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-and-correspondence-rules-2/sssss3ax"/>
      <lastmod>2026-11-02T18:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fermat-point-construction/sssss3ai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fermat-point-construction/sssss3ai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fermat-point-construction/sssss3ai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fermat-point-construction/sssss3ai"/>
      <lastmod>2026-11-01T23:40:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fermat-point-construction/sssss3ai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fermat-point-construction/sssss3ai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fermat-point-construction/sssss3ai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fermat-point-construction/sssss3ai"/>
      <lastmod>2026-11-01T23:40:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/manual-derivative-drawing/sssss3ao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/manual-derivative-drawing/sssss3ao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/manual-derivative-drawing/sssss3ao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/manual-derivative-drawing/sssss3ao"/>
      <lastmod>2026-11-02T17:39:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/manual-derivative-drawing/sssss3ao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/manual-derivative-drawing/sssss3ao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/manual-derivative-drawing/sssss3ao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/manual-derivative-drawing/sssss3ao"/>
      <lastmod>2026-11-02T17:39:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-functions-and-minima/sssss3cs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-and-minima/sssss3cs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-and-minima/sssss3cs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-and-minima/sssss3cs"/>
      <lastmod>2026-11-02T00:40:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-functions-and-minima/sssss3cs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-and-minima/sssss3cs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-and-minima/sssss3cs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-and-minima/sssss3cs"/>
      <lastmod>2026-11-02T00:40:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dividing-fractions-by-morris-m-centeno/sssss3c7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-fractions-by-morris-m-centeno/sssss3c7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-fractions-by-morris-m-centeno/sssss3c7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-fractions-by-morris-m-centeno/sssss3c7"/>
      <lastmod>2026-11-01T21:26:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dividing-fractions-by-morris-m-centeno/sssss3c7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-fractions-by-morris-m-centeno/sssss3c7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-fractions-by-morris-m-centeno/sssss3c7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-fractions-by-morris-m-centeno/sssss3c7"/>
      <lastmod>2026-11-01T21:26:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/five-distinct-numbers/sssss3cn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/five-distinct-numbers/sssss3cn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/five-distinct-numbers/sssss3cn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/five-distinct-numbers/sssss3cn"/>
      <lastmod>2026-11-02T18:32:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/five-distinct-numbers/sssss3cn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/five-distinct-numbers/sssss3cn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/five-distinct-numbers/sssss3cn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/five-distinct-numbers/sssss3cn"/>
      <lastmod>2026-11-02T18:32:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-activity-on-x-and-y-axis/sssss3c2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-activity-on-x-and-y-axis/sssss3c2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-activity-on-x-and-y-axis/sssss3c2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-activity-on-x-and-y-axis/sssss3c2"/>
      <lastmod>2026-11-01T19:08:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-activity-on-x-and-y-axis/sssss3c2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-activity-on-x-and-y-axis/sssss3c2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-activity-on-x-and-y-axis/sssss3c2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-activity-on-x-and-y-axis/sssss3c2"/>
      <lastmod>2026-11-01T19:08:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-and-parallelogram-demonstration/sssss3ck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-parallelogram-demonstration/sssss3ck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-parallelogram-demonstration/sssss3ck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-parallelogram-demonstration/sssss3ck"/>
      <lastmod>2026-11-02T02:19:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-and-parallelogram-demonstration/sssss3ck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-parallelogram-demonstration/sssss3ck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-parallelogram-demonstration/sssss3ck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-parallelogram-demonstration/sssss3ck"/>
      <lastmod>2026-11-02T02:19:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-of-2x-2-x-2-1/sssss3cz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-2x-2-x-2-1/sssss3cz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-2x-2-x-2-1/sssss3cz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-2x-2-x-2-1/sssss3cz"/>
      <lastmod>2026-11-02T16:36:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-of-2x-2-x-2-1/sssss3cz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-2x-2-x-2-1/sssss3cz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-2x-2-x-2-1/sssss3cz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-2x-2-x-2-1/sssss3cz"/>
      <lastmod>2026-11-02T16:36:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mae-s-cone/sssss3c0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mae-s-cone/sssss3c0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mae-s-cone/sssss3c0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mae-s-cone/sssss3c0"/>
      <lastmod>2026-11-02T17:17:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mae-s-cone/sssss3c0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mae-s-cone/sssss3c0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mae-s-cone/sssss3c0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mae-s-cone/sssss3c0"/>
      <lastmod>2026-11-02T17:17:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-the-side-length-square-root/sssss3cd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-side-length-square-root/sssss3cd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-side-length-square-root/sssss3cd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-side-length-square-root/sssss3cd"/>
      <lastmod>2026-11-02T14:55:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-the-side-length-square-root/sssss3cd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-side-length-square-root/sssss3cd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-side-length-square-root/sssss3cd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-side-length-square-root/sssss3cd"/>
      <lastmod>2026-11-02T14:55:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/generating-data-with-desired-correlation-a-statistical-simulation/sssss3cf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generating-data-with-desired-correlation-a-statistical-simulation/sssss3cf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generating-data-with-desired-correlation-a-statistical-simulation/sssss3cf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generating-data-with-desired-correlation-a-statistical-simulation/sssss3cf"/>
      <lastmod>2026-11-02T02:31:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/generating-data-with-desired-correlation-a-statistical-simulation/sssss3cf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generating-data-with-desired-correlation-a-statistical-simulation/sssss3cf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generating-data-with-desired-correlation-a-statistical-simulation/sssss3cf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generating-data-with-desired-correlation-a-statistical-simulation/sssss3cf"/>
      <lastmod>2026-11-02T02:31:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-ellipse-parabola-hyperbola/sssss3c8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-ellipse-parabola-hyperbola/sssss3c8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-ellipse-parabola-hyperbola/sssss3c8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-ellipse-parabola-hyperbola/sssss3c8"/>
      <lastmod>2026-11-02T03:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-ellipse-parabola-hyperbola/sssss3c8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-ellipse-parabola-hyperbola/sssss3c8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-ellipse-parabola-hyperbola/sssss3c8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-ellipse-parabola-hyperbola/sssss3c8"/>
      <lastmod>2026-11-02T03:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersecting-spheres/sssss3cu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-spheres/sssss3cu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-spheres/sssss3cu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-spheres/sssss3cu"/>
      <lastmod>2026-11-02T11:58:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersecting-spheres/sssss3cu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-spheres/sssss3cu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-spheres/sssss3cu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-spheres/sssss3cu"/>
      <lastmod>2026-11-02T11:58:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/model-the-st-louis-arch/sssss3c5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/model-the-st-louis-arch/sssss3c5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/model-the-st-louis-arch/sssss3c5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/model-the-st-louis-arch/sssss3c5"/>
      <lastmod>2026-11-02T15:18:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/model-the-st-louis-arch/sssss3c5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/model-the-st-louis-arch/sssss3c5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/model-the-st-louis-arch/sssss3c5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/model-the-st-louis-arch/sssss3c5"/>
      <lastmod>2026-11-02T15:18:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-multiplication-demo-by-roger-gemberling/sssss3cb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demo-by-roger-gemberling/sssss3cb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-multiplication-demo-by-roger-gemberling/sssss3cb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demo-by-roger-gemberling/sssss3cb"/>
      <lastmod>2026-11-02T16:41:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-multiplication-demo-by-roger-gemberling/sssss3cb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demo-by-roger-gemberling/sssss3cb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-multiplication-demo-by-roger-gemberling/sssss3cb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demo-by-roger-gemberling/sssss3cb"/>
      <lastmod>2026-11-02T16:41:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-prism-net/sssss3c3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-prism-net/sssss3c3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-prism-net/sssss3c3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-prism-net/sssss3c3"/>
      <lastmod>2026-11-01T21:28:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-prism-net/sssss3c3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-prism-net/sssss3c3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-prism-net/sssss3c3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-prism-net/sssss3c3"/>
      <lastmod>2026-11-01T21:28:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-reflections/sssss3cq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-reflections/sssss3cq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-reflections/sssss3cq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-reflections/sssss3cq"/>
      <lastmod>2026-11-01T19:36:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-reflections/sssss3cq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-reflections/sssss3cq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-reflections/sssss3cq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-reflections/sssss3cq"/>
      <lastmod>2026-11-01T19:36:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hsv-scheme-simple-example/sssss3c1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hsv-scheme-simple-example/sssss3c1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hsv-scheme-simple-example/sssss3c1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hsv-scheme-simple-example/sssss3c1"/>
      <lastmod>2026-11-01T21:06:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hsv-scheme-simple-example/sssss3c1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hsv-scheme-simple-example/sssss3c1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hsv-scheme-simple-example/sssss3c1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hsv-scheme-simple-example/sssss3c1"/>
      <lastmod>2026-11-01T21:06:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-the-orthocenter/sssss3cm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-the-orthocenter/sssss3cm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-the-orthocenter/sssss3cm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-the-orthocenter/sssss3cm"/>
      <lastmod>2026-11-01T23:56:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-the-orthocenter/sssss3cm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-the-orthocenter/sssss3cm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-the-orthocenter/sssss3cm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-the-orthocenter/sssss3cm"/>
      <lastmod>2026-11-01T23:56:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-demo/sssss3cj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-demo/sssss3cj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions-demo/sssss3cj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-demo/sssss3cj"/>
      <lastmod>2026-11-02T02:57:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions-demo/sssss3cj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-demo/sssss3cj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions-demo/sssss3cj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-demo/sssss3cj"/>
      <lastmod>2026-11-02T02:57:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-sections-of-cone/sssss3cp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-cone/sssss3cp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-cone/sssss3cp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-cone/sssss3cp"/>
      <lastmod>2026-11-01T23:27:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-sections-of-cone/sssss3cp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-cone/sssss3cp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-cone/sssss3cp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-cone/sssss3cp"/>
      <lastmod>2026-11-01T23:27:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-bearing-illustrator/sssss3cw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-bearing-illustrator/sssss3cw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-bearing-illustrator/sssss3cw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-bearing-illustrator/sssss3cw"/>
      <lastmod>2026-11-02T17:01:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-bearing-illustrator/sssss3cw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-bearing-illustrator/sssss3cw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-bearing-illustrator/sssss3cw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-bearing-illustrator/sssss3cw"/>
      <lastmod>2026-11-02T17:01:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interference-of-sine-functions/sssss3c6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interference-of-sine-functions/sssss3c6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interference-of-sine-functions/sssss3c6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interference-of-sine-functions/sssss3c6"/>
      <lastmod>2026-11-01T23:57:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interference-of-sine-functions/sssss3c6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interference-of-sine-functions/sssss3c6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interference-of-sine-functions/sssss3c6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interference-of-sine-functions/sssss3c6"/>
      <lastmod>2026-11-01T23:57:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-animation/sssss3cg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-animation/sssss3cg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-animation/sssss3cg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-animation/sssss3cg"/>
      <lastmod>2026-11-02T18:12:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-animation/sssss3cg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-animation/sssss3cg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-animation/sssss3cg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-animation/sssss3cg"/>
      <lastmod>2026-11-02T18:12:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-icosidodecahedron-by-chris-cambr/sssss3c9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-icosidodecahedron-by-chris-cambr/sssss3c9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-icosidodecahedron-by-chris-cambr/sssss3c9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-icosidodecahedron-by-chris-cambr/sssss3c9"/>
      <lastmod>2026-11-02T09:03:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-icosidodecahedron-by-chris-cambr/sssss3c9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-icosidodecahedron-by-chris-cambr/sssss3c9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-icosidodecahedron-by-chris-cambr/sssss3c9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-icosidodecahedron-by-chris-cambr/sssss3c9"/>
      <lastmod>2026-11-02T09:03:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-right-triangular-pyramid/sssss3ce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-right-triangular-pyramid/sssss3ce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-right-triangular-pyramid/sssss3ce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-right-triangular-pyramid/sssss3ce"/>
      <lastmod>2026-11-01T23:51:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-right-triangular-pyramid/sssss3ce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-right-triangular-pyramid/sssss3ce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-right-triangular-pyramid/sssss3ce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-right-triangular-pyramid/sssss3ce"/>
      <lastmod>2026-11-01T23:51:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interior-angles-of-polygons-by-jila/sssss3cv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-angles-of-polygons-by-jila/sssss3cv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-angles-of-polygons-by-jila/sssss3cv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-angles-of-polygons-by-jila/sssss3cv"/>
      <lastmod>2026-11-02T18:44:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interior-angles-of-polygons-by-jila/sssss3cv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-angles-of-polygons-by-jila/sssss3cv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-angles-of-polygons-by-jila/sssss3cv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-angles-of-polygons-by-jila/sssss3cv"/>
      <lastmod>2026-11-02T18:44:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-angles-demonstration/sssss3c4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-angles-demonstration/sssss3c4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-angles-demonstration/sssss3c4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-angles-demonstration/sssss3c4"/>
      <lastmod>2026-11-02T18:39:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-angles-demonstration/sssss3c4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-angles-demonstration/sssss3c4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-angles-demonstration/sssss3c4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-angles-demonstration/sssss3c4"/>
      <lastmod>2026-11-02T18:39:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logo-bq-geometric-construction-with-transformations-and-conics/sssss3cl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-bq-geometric-construction-with-transformations-and-conics/sssss3cl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-bq-geometric-construction-with-transformations-and-conics/sssss3cl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-bq-geometric-construction-with-transformations-and-conics/sssss3cl"/>
      <lastmod>2026-11-01T21:44:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logo-bq-geometric-construction-with-transformations-and-conics/sssss3cl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-bq-geometric-construction-with-transformations-and-conics/sssss3cl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-bq-geometric-construction-with-transformations-and-conics/sssss3cl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-bq-geometric-construction-with-transformations-and-conics/sssss3cl"/>
      <lastmod>2026-11-01T21:44:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dissecting-cubes-demo/sssss3cy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dissecting-cubes-demo/sssss3cy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dissecting-cubes-demo/sssss3cy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dissecting-cubes-demo/sssss3cy"/>
      <lastmod>2026-11-01T22:08:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dissecting-cubes-demo/sssss3cy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dissecting-cubes-demo/sssss3cy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dissecting-cubes-demo/sssss3cy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dissecting-cubes-demo/sssss3cy"/>
      <lastmod>2026-11-01T22:08:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-vectors-by-robert-rahm/sssss3ca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-vectors-by-robert-rahm/sssss3ca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-vectors-by-robert-rahm/sssss3ca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-vectors-by-robert-rahm/sssss3ca"/>
      <lastmod>2026-11-01T23:16:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-vectors-by-robert-rahm/sssss3ca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-vectors-by-robert-rahm/sssss3ca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-vectors-by-robert-rahm/sssss3ca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-vectors-by-robert-rahm/sssss3ca"/>
      <lastmod>2026-11-01T23:16:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-vs-cone-volume-comparison/sssss3cc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-vs-cone-volume-comparison/sssss3cc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-vs-cone-volume-comparison/sssss3cc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-vs-cone-volume-comparison/sssss3cc"/>
      <lastmod>2026-11-02T18:14:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-vs-cone-volume-comparison/sssss3cc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-vs-cone-volume-comparison/sssss3cc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-vs-cone-volume-comparison/sssss3cc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-vs-cone-volume-comparison/sssss3cc"/>
      <lastmod>2026-11-02T18:14:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euler-s-method/sssss3cr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-s-method/sssss3cr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-s-method/sssss3cr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-s-method/sssss3cr"/>
      <lastmod>2026-11-01T21:36:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euler-s-method/sssss3cr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-s-method/sssss3cr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-s-method/sssss3cr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-s-method/sssss3cr"/>
      <lastmod>2026-11-01T21:36:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-dbroadstone/sssss3ch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-dbroadstone/sssss3ch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-inequalities-by-dbroadstone/sssss3ch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-dbroadstone/sssss3ch"/>
      <lastmod>2026-11-02T07:06:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-inequalities-by-dbroadstone/sssss3ch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-dbroadstone/sssss3ch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-inequalities-by-dbroadstone/sssss3ch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-dbroadstone/sssss3ch"/>
      <lastmod>2026-11-02T07:06:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plot-the-root-cueba0020/sssss3ct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plot-the-root-cueba0020/sssss3ct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plot-the-root-cueba0020/sssss3ct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plot-the-root-cueba0020/sssss3ct"/>
      <lastmod>2026-11-01T23:36:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plot-the-root-cueba0020/sssss3ct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plot-the-root-cueba0020/sssss3ct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plot-the-root-cueba0020/sssss3ct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plot-the-root-cueba0020/sssss3ct"/>
      <lastmod>2026-11-01T23:36:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-fractions-with-unlike-denominators-fraction-tiles/sssss3cx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions-with-unlike-denominators-fraction-tiles/sssss3cx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions-with-unlike-denominators-fraction-tiles/sssss3cx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions-with-unlike-denominators-fraction-tiles/sssss3cx"/>
      <lastmod>2026-11-02T00:42:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-fractions-with-unlike-denominators-fraction-tiles/sssss3cx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions-with-unlike-denominators-fraction-tiles/sssss3cx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions-with-unlike-denominators-fraction-tiles/sssss3cx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions-with-unlike-denominators-fraction-tiles/sssss3cx"/>
      <lastmod>2026-11-02T00:42:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-pyramid-anatomy-by-tim-brzezinski/sssss3ci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid-anatomy-by-tim-brzezinski/sssss3ci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid-anatomy-by-tim-brzezinski/sssss3ci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid-anatomy-by-tim-brzezinski/sssss3ci"/>
      <lastmod>2026-11-02T17:02:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-pyramid-anatomy-by-tim-brzezinski/sssss3ci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid-anatomy-by-tim-brzezinski/sssss3ci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid-anatomy-by-tim-brzezinski/sssss3ci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid-anatomy-by-tim-brzezinski/sssss3ci"/>
      <lastmod>2026-11-02T17:02:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-volume-calculation-by-geogebra-classroom-activities/sssss3co</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-by-geogebra-classroom-activities/sssss3co"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-calculation-by-geogebra-classroom-activities/sssss3co"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-by-geogebra-classroom-activities/sssss3co"/>
      <lastmod>2026-11-02T10:36:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-volume-calculation-by-geogebra-classroom-activities/sssss3co</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-by-geogebra-classroom-activities/sssss3co"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-calculation-by-geogebra-classroom-activities/sssss3co"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-by-geogebra-classroom-activities/sssss3co"/>
      <lastmod>2026-11-02T10:36:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-of-obtuse-angles/sssss3rs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-of-obtuse-angles/sssss3rs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-of-obtuse-angles/sssss3rs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-of-obtuse-angles/sssss3rs"/>
      <lastmod>2026-11-02T03:07:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-of-obtuse-angles/sssss3rs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-of-obtuse-angles/sssss3rs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-of-obtuse-angles/sssss3rs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-of-obtuse-angles/sssss3rs"/>
      <lastmod>2026-11-02T03:07:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ice-cream/sssss3r7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ice-cream/sssss3r7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ice-cream/sssss3r7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ice-cream/sssss3r7"/>
      <lastmod>2026-11-02T18:54:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ice-cream/sssss3r7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ice-cream/sssss3r7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ice-cream/sssss3r7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ice-cream/sssss3r7"/>
      <lastmod>2026-11-02T18:54:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/direction-cosine-with-z-axis/sssss3rn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direction-cosine-with-z-axis/sssss3rn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direction-cosine-with-z-axis/sssss3rn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direction-cosine-with-z-axis/sssss3rn"/>
      <lastmod>2026-11-02T18:38:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/direction-cosine-with-z-axis/sssss3rn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direction-cosine-with-z-axis/sssss3rn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direction-cosine-with-z-axis/sssss3rn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direction-cosine-with-z-axis/sssss3rn"/>
      <lastmod>2026-11-02T18:38:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-views-of-prisms/sssss3r2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-views-of-prisms/sssss3r2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-views-of-prisms/sssss3r2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-views-of-prisms/sssss3r2"/>
      <lastmod>2026-11-02T16:41:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-views-of-prisms/sssss3r2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-views-of-prisms/sssss3r2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-views-of-prisms/sssss3r2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-views-of-prisms/sssss3r2"/>
      <lastmod>2026-11-02T16:41:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-cross-sections-by-aedamar-frawley/sssss3rk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-cross-sections-by-aedamar-frawley/sssss3rk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-cross-sections-by-aedamar-frawley/sssss3rk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-cross-sections-by-aedamar-frawley/sssss3rk"/>
      <lastmod>2026-11-02T02:44:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-cross-sections-by-aedamar-frawley/sssss3rk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-cross-sections-by-aedamar-frawley/sssss3rk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-cross-sections-by-aedamar-frawley/sssss3rk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-cross-sections-by-aedamar-frawley/sssss3rk"/>
      <lastmod>2026-11-02T02:44:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-tangents-from-an-external-point-to-a-circle/sssss3rz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-tangents-from-an-external-point-to-a-circle/sssss3rz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-tangents-from-an-external-point-to-a-circle/sssss3rz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-tangents-from-an-external-point-to-a-circle/sssss3rz"/>
      <lastmod>2026-11-01T20:20:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-tangents-from-an-external-point-to-a-circle/sssss3rz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-tangents-from-an-external-point-to-a-circle/sssss3rz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-tangents-from-an-external-point-to-a-circle/sssss3rz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-tangents-from-an-external-point-to-a-circle/sssss3rz"/>
      <lastmod>2026-11-01T20:20:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-cylinder-by-d-riley/sssss3r0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cylinder-by-d-riley/sssss3r0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cylinder-by-d-riley/sssss3r0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cylinder-by-d-riley/sssss3r0"/>
      <lastmod>2026-11-02T18:16:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-cylinder-by-d-riley/sssss3r0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cylinder-by-d-riley/sssss3r0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cylinder-by-d-riley/sssss3r0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cylinder-by-d-riley/sssss3r0"/>
      <lastmod>2026-11-02T18:16:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-odd-numbers/sssss3rd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-odd-numbers/sssss3rd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-odd-numbers/sssss3rd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-odd-numbers/sssss3rd"/>
      <lastmod>2026-11-02T12:58:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-odd-numbers/sssss3rd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-odd-numbers/sssss3rd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-odd-numbers/sssss3rd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-odd-numbers/sssss3rd"/>
      <lastmod>2026-11-02T12:58:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-combinations-of-vectors/sssss3rf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-combinations-of-vectors/sssss3rf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-combinations-of-vectors/sssss3rf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-combinations-of-vectors/sssss3rf"/>
      <lastmod>2026-11-02T03:04:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-combinations-of-vectors/sssss3rf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-combinations-of-vectors/sssss3rf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-combinations-of-vectors/sssss3rf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-combinations-of-vectors/sssss3rf"/>
      <lastmod>2026-11-02T03:04:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratios-expressed-as-fractions/sssss3r8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-expressed-as-fractions/sssss3r8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-expressed-as-fractions/sssss3r8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-expressed-as-fractions/sssss3r8"/>
      <lastmod>2026-11-02T12:32:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratios-expressed-as-fractions/sssss3r8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-expressed-as-fractions/sssss3r8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-expressed-as-fractions/sssss3r8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-expressed-as-fractions/sssss3r8"/>
      <lastmod>2026-11-02T12:32:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-and-vector-relationship-demo/sssss3ru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-vector-relationship-demo/sssss3ru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-vector-relationship-demo/sssss3ru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-vector-relationship-demo/sssss3ru"/>
      <lastmod>2026-11-01T23:11:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-and-vector-relationship-demo/sssss3ru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-vector-relationship-demo/sssss3ru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-vector-relationship-demo/sssss3ru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-vector-relationship-demo/sssss3ru"/>
      <lastmod>2026-11-01T23:11:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/what-is-an-incenter/sssss3r5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-is-an-incenter/sssss3r5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-is-an-incenter/sssss3r5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-is-an-incenter/sssss3r5"/>
      <lastmod>2026-11-02T16:30:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/what-is-an-incenter/sssss3r5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-is-an-incenter/sssss3r5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-is-an-incenter/sssss3r5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-is-an-incenter/sssss3r5"/>
      <lastmod>2026-11-02T16:30:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-functions-and-geometric-constructions-in-quadrant-iii/sssss3rb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-and-geometric-constructions-in-quadrant-iii/sssss3rb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-and-geometric-constructions-in-quadrant-iii/sssss3rb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-and-geometric-constructions-in-quadrant-iii/sssss3rb"/>
      <lastmod>2026-11-02T17:01:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-functions-and-geometric-constructions-in-quadrant-iii/sssss3rb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-and-geometric-constructions-in-quadrant-iii/sssss3rb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-and-geometric-constructions-in-quadrant-iii/sssss3rb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-and-geometric-constructions-in-quadrant-iii/sssss3rb"/>
      <lastmod>2026-11-02T17:01:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimate-side-and-angles-of-right-angled-triangles/sssss3r3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimate-side-and-angles-of-right-angled-triangles/sssss3r3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimate-side-and-angles-of-right-angled-triangles/sssss3r3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimate-side-and-angles-of-right-angled-triangles/sssss3r3"/>
      <lastmod>2026-11-02T16:45:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimate-side-and-angles-of-right-angled-triangles/sssss3r3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimate-side-and-angles-of-right-angled-triangles/sssss3r3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimate-side-and-angles-of-right-angled-triangles/sssss3r3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimate-side-and-angles-of-right-angled-triangles/sssss3r3"/>
      <lastmod>2026-11-02T16:45:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/build-your-own-right-triangular-prism/sssss3rq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-your-own-right-triangular-prism/sssss3rq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-your-own-right-triangular-prism/sssss3rq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-your-own-right-triangular-prism/sssss3rq"/>
      <lastmod>2026-11-01T21:40:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/build-your-own-right-triangular-prism/sssss3rq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-your-own-right-triangular-prism/sssss3rq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-your-own-right-triangular-prism/sssss3rq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-your-own-right-triangular-prism/sssss3rq"/>
      <lastmod>2026-11-01T21:40:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mario-geometry-challenge/sssss3r1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mario-geometry-challenge/sssss3r1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mario-geometry-challenge/sssss3r1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mario-geometry-challenge/sssss3r1"/>
      <lastmod>2026-11-02T00:31:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mario-geometry-challenge/sssss3r1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mario-geometry-challenge/sssss3r1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mario-geometry-challenge/sssss3r1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mario-geometry-challenge/sssss3r1"/>
      <lastmod>2026-11-02T00:31:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ornamental-sphere/sssss3rm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ornamental-sphere/sssss3rm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ornamental-sphere/sssss3rm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ornamental-sphere/sssss3rm"/>
      <lastmod>2026-11-01T23:42:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ornamental-sphere/sssss3rm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ornamental-sphere/sssss3rm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ornamental-sphere/sssss3rm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ornamental-sphere/sssss3rm"/>
      <lastmod>2026-11-01T23:42:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-and-surface-area-of-trapezoidal-prism/sssss3rj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-trapezoidal-prism/sssss3rj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-and-surface-area-of-trapezoidal-prism/sssss3rj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-trapezoidal-prism/sssss3rj"/>
      <lastmod>2026-11-02T16:42:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-and-surface-area-of-trapezoidal-prism/sssss3rj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-trapezoidal-prism/sssss3rj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-and-surface-area-of-trapezoidal-prism/sssss3rj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-trapezoidal-prism/sssss3rj"/>
      <lastmod>2026-11-02T16:42:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/median-median-line-vs-lsrl-for-ten-points/sssss3rp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/median-median-line-vs-lsrl-for-ten-points/sssss3rp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/median-median-line-vs-lsrl-for-ten-points/sssss3rp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/median-median-line-vs-lsrl-for-ten-points/sssss3rp"/>
      <lastmod>2026-11-02T18:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/median-median-line-vs-lsrl-for-ten-points/sssss3rp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/median-median-line-vs-lsrl-for-ten-points/sssss3rp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/median-median-line-vs-lsrl-for-ten-points/sssss3rp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/median-median-line-vs-lsrl-for-ten-points/sssss3rp"/>
      <lastmod>2026-11-02T18:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-many-pyramids-in-a-cube-by-jimi-grover/sssss3rw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-many-pyramids-in-a-cube-by-jimi-grover/sssss3rw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-many-pyramids-in-a-cube-by-jimi-grover/sssss3rw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-many-pyramids-in-a-cube-by-jimi-grover/sssss3rw"/>
      <lastmod>2026-11-01T23:23:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-many-pyramids-in-a-cube-by-jimi-grover/sssss3rw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-many-pyramids-in-a-cube-by-jimi-grover/sssss3rw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-many-pyramids-in-a-cube-by-jimi-grover/sssss3rw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-many-pyramids-in-a-cube-by-jimi-grover/sssss3rw"/>
      <lastmod>2026-11-01T23:23:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/positive-cartesian-integers-v1-1/sssss3r6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/positive-cartesian-integers-v1-1/sssss3r6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/positive-cartesian-integers-v1-1/sssss3r6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/positive-cartesian-integers-v1-1/sssss3r6"/>
      <lastmod>2026-11-01T21:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/positive-cartesian-integers-v1-1/sssss3r6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/positive-cartesian-integers-v1-1/sssss3r6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/positive-cartesian-integers-v1-1/sssss3r6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/positive-cartesian-integers-v1-1/sssss3r6"/>
      <lastmod>2026-11-01T21:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-and-segment-interactive-geometric-construction/sssss3rg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-and-segment-interactive-geometric-construction/sssss3rg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-and-segment-interactive-geometric-construction/sssss3rg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-and-segment-interactive-geometric-construction/sssss3rg"/>
      <lastmod>2026-11-02T18:40:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-and-segment-interactive-geometric-construction/sssss3rg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-and-segment-interactive-geometric-construction/sssss3rg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-and-segment-interactive-geometric-construction/sssss3rg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-and-segment-interactive-geometric-construction/sssss3rg"/>
      <lastmod>2026-11-02T18:40:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-of-the-sum-of-the-first-odd-numbers/sssss3r9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-of-the-sum-of-the-first-odd-numbers/sssss3r9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-of-the-sum-of-the-first-odd-numbers/sssss3r9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-of-the-sum-of-the-first-odd-numbers/sssss3r9"/>
      <lastmod>2026-11-01T19:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-of-the-sum-of-the-first-odd-numbers/sssss3r9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-of-the-sum-of-the-first-odd-numbers/sssss3r9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-of-the-sum-of-the-first-odd-numbers/sssss3r9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-of-the-sum-of-the-first-odd-numbers/sssss3r9"/>
      <lastmod>2026-11-01T19:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-fractions-by-edward-knote/sssss3re</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-fractions-by-edward-knote/sssss3re"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-fractions-by-edward-knote/sssss3re"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-fractions-by-edward-knote/sssss3re"/>
      <lastmod>2026-11-02T15:50:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-fractions-by-edward-knote/sssss3re</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-fractions-by-edward-knote/sssss3re"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-fractions-by-edward-knote/sssss3re"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-fractions-by-edward-knote/sssss3re"/>
      <lastmod>2026-11-02T15:50:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-relationship-between-cone-and-cylinder/sssss3rv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-relationship-between-cone-and-cylinder/sssss3rv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-relationship-between-cone-and-cylinder/sssss3rv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-relationship-between-cone-and-cylinder/sssss3rv"/>
      <lastmod>2026-11-01T21:20:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-relationship-between-cone-and-cylinder/sssss3rv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-relationship-between-cone-and-cylinder/sssss3rv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-relationship-between-cone-and-cylinder/sssss3rv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-relationship-between-cone-and-cylinder/sssss3rv"/>
      <lastmod>2026-11-01T21:20:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/randomly-flip-a-coin/sssss3r4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/randomly-flip-a-coin/sssss3r4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/randomly-flip-a-coin/sssss3r4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/randomly-flip-a-coin/sssss3r4"/>
      <lastmod>2026-11-02T12:21:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/randomly-flip-a-coin/sssss3r4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/randomly-flip-a-coin/sssss3r4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/randomly-flip-a-coin/sssss3r4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/randomly-flip-a-coin/sssss3r4"/>
      <lastmod>2026-11-02T12:21:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nth-roots-of-a-complex-number-by-anna-lena-boch/sssss3rl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nth-roots-of-a-complex-number-by-anna-lena-boch/sssss3rl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nth-roots-of-a-complex-number-by-anna-lena-boch/sssss3rl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nth-roots-of-a-complex-number-by-anna-lena-boch/sssss3rl"/>
      <lastmod>2026-11-02T00:05:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nth-roots-of-a-complex-number-by-anna-lena-boch/sssss3rl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nth-roots-of-a-complex-number-by-anna-lena-boch/sssss3rl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nth-roots-of-a-complex-number-by-anna-lena-boch/sssss3rl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nth-roots-of-a-complex-number-by-anna-lena-boch/sssss3rl"/>
      <lastmod>2026-11-02T00:05:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-two-circles-by-joeclinton1/sssss3ry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-circles-by-joeclinton1/sssss3ry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-circles-by-joeclinton1/sssss3ry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-circles-by-joeclinton1/sssss3ry"/>
      <lastmod>2026-11-02T00:03:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-two-circles-by-joeclinton1/sssss3ry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-circles-by-joeclinton1/sssss3ry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-circles-by-joeclinton1/sssss3ry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-circles-by-joeclinton1/sssss3ry"/>
      <lastmod>2026-11-02T00:03:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solve-one-step-equations-by-multiplying-or-dividing/sssss3ra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-one-step-equations-by-multiplying-or-dividing/sssss3ra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-one-step-equations-by-multiplying-or-dividing/sssss3ra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-one-step-equations-by-multiplying-or-dividing/sssss3ra"/>
      <lastmod>2026-11-02T00:17:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solve-one-step-equations-by-multiplying-or-dividing/sssss3ra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-one-step-equations-by-multiplying-or-dividing/sssss3ra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-one-step-equations-by-multiplying-or-dividing/sssss3ra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-one-step-equations-by-multiplying-or-dividing/sssss3ra"/>
      <lastmod>2026-11-02T00:17:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-verification-of-law-of-sines-and-cosines/sssss3rc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-verification-of-law-of-sines-and-cosines/sssss3rc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-verification-of-law-of-sines-and-cosines/sssss3rc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-verification-of-law-of-sines-and-cosines/sssss3rc"/>
      <lastmod>2026-11-01T19:00:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-verification-of-law-of-sines-and-cosines/sssss3rc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-verification-of-law-of-sines-and-cosines/sssss3rc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-verification-of-law-of-sines-and-cosines/sssss3rc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-verification-of-law-of-sines-and-cosines/sssss3rc"/>
      <lastmod>2026-11-01T19:00:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pendulum-with-unrolled-dial/sssss3rr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pendulum-with-unrolled-dial/sssss3rr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pendulum-with-unrolled-dial/sssss3rr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pendulum-with-unrolled-dial/sssss3rr"/>
      <lastmod>2026-11-01T19:36:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pendulum-with-unrolled-dial/sssss3rr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pendulum-with-unrolled-dial/sssss3rr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pendulum-with-unrolled-dial/sssss3rr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pendulum-with-unrolled-dial/sssss3rr"/>
      <lastmod>2026-11-01T19:36:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-parallel-through-a-point-using-the-rhombus-method/sssss3rh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallel-through-a-point-using-the-rhombus-method/sssss3rh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallel-through-a-point-using-the-rhombus-method/sssss3rh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallel-through-a-point-using-the-rhombus-method/sssss3rh"/>
      <lastmod>2026-11-02T11:58:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-parallel-through-a-point-using-the-rhombus-method/sssss3rh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallel-through-a-point-using-the-rhombus-method/sssss3rh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallel-through-a-point-using-the-rhombus-method/sssss3rh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallel-through-a-point-using-the-rhombus-method/sssss3rh"/>
      <lastmod>2026-11-02T11:58:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-exploration-by-courtney-o-berry/sssss3rt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-exploration-by-courtney-o-berry/sssss3rt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-exploration-by-courtney-o-berry/sssss3rt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-exploration-by-courtney-o-berry/sssss3rt"/>
      <lastmod>2026-11-02T02:59:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-exploration-by-courtney-o-berry/sssss3rt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-exploration-by-courtney-o-berry/sssss3rt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-exploration-by-courtney-o-berry/sssss3rt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-exploration-by-courtney-o-berry/sssss3rt"/>
      <lastmod>2026-11-02T02:59:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/order-of-operations-addition-and-subtraction/sssss3rx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/order-of-operations-addition-and-subtraction/sssss3rx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/order-of-operations-addition-and-subtraction/sssss3rx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/order-of-operations-addition-and-subtraction/sssss3rx"/>
      <lastmod>2026-11-02T17:14:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/order-of-operations-addition-and-subtraction/sssss3rx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/order-of-operations-addition-and-subtraction/sssss3rx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/order-of-operations-addition-and-subtraction/sssss3rx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/order-of-operations-addition-and-subtraction/sssss3rx"/>
      <lastmod>2026-11-02T17:14:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/place-a-radian-angle-on-the-unit-circle/sssss3ri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/place-a-radian-angle-on-the-unit-circle/sssss3ri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/place-a-radian-angle-on-the-unit-circle/sssss3ri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/place-a-radian-angle-on-the-unit-circle/sssss3ri"/>
      <lastmod>2026-11-01T19:13:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/place-a-radian-angle-on-the-unit-circle/sssss3ri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/place-a-radian-angle-on-the-unit-circle/sssss3ri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/place-a-radian-angle-on-the-unit-circle/sssss3ri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/place-a-radian-angle-on-the-unit-circle/sssss3ri"/>
      <lastmod>2026-11-01T19:13:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-section-of-a-rectangular-pyramid/sssss3ro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-rectangular-pyramid/sssss3ro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-rectangular-pyramid/sssss3ro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-rectangular-pyramid/sssss3ro"/>
      <lastmod>2026-11-01T19:11:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-section-of-a-rectangular-pyramid/sssss3ro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-rectangular-pyramid/sssss3ro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-rectangular-pyramid/sssss3ro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-rectangular-pyramid/sssss3ro"/>
      <lastmod>2026-11-01T19:11:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-part-1-dynamic-proportionality-and-corresponding-angles/sssss3hs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-part-1-dynamic-proportionality-and-corresponding-angles/sssss3hs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-part-1-dynamic-proportionality-and-corresponding-angles/sssss3hs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-part-1-dynamic-proportionality-and-corresponding-angles/sssss3hs"/>
      <lastmod>2026-11-02T08:55:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-part-1-dynamic-proportionality-and-corresponding-angles/sssss3hs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-part-1-dynamic-proportionality-and-corresponding-angles/sssss3hs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-part-1-dynamic-proportionality-and-corresponding-angles/sssss3hs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-part-1-dynamic-proportionality-and-corresponding-angles/sssss3hs"/>
      <lastmod>2026-11-02T08:55:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dancing-cubes-on-torus-knots-ii/sssss3h7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dancing-cubes-on-torus-knots-ii/sssss3h7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dancing-cubes-on-torus-knots-ii/sssss3h7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dancing-cubes-on-torus-knots-ii/sssss3h7"/>
      <lastmod>2026-11-02T00:06:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dancing-cubes-on-torus-knots-ii/sssss3h7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dancing-cubes-on-torus-knots-ii/sssss3h7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dancing-cubes-on-torus-knots-ii/sssss3h7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dancing-cubes-on-torus-knots-ii/sssss3h7"/>
      <lastmod>2026-11-02T00:06:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/moving-points/sssss3hn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moving-points/sssss3hn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moving-points/sssss3hn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moving-points/sssss3hn"/>
      <lastmod>2026-11-02T02:48:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/moving-points/sssss3hn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moving-points/sssss3hn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moving-points/sssss3hn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moving-points/sssss3hn"/>
      <lastmod>2026-11-02T02:48:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-vector-demonstration/sssss3h2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vector-demonstration/sssss3h2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vector-demonstration/sssss3h2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vector-demonstration/sssss3h2"/>
      <lastmod>2026-11-02T18:52:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-vector-demonstration/sssss3h2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vector-demonstration/sssss3h2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vector-demonstration/sssss3h2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vector-demonstration/sssss3h2"/>
      <lastmod>2026-11-02T18:52:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-under-a-curve-by-menchublancodelprado/sssss3hk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-a-curve-by-menchublancodelprado/sssss3hk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-a-curve-by-menchublancodelprado/sssss3hk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-a-curve-by-menchublancodelprado/sssss3hk"/>
      <lastmod>2026-11-01T21:55:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-under-a-curve-by-menchublancodelprado/sssss3hk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-a-curve-by-menchublancodelprado/sssss3hk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-a-curve-by-menchublancodelprado/sssss3hk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-a-curve-by-menchublancodelprado/sssss3hk"/>
      <lastmod>2026-11-01T21:55:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relationship-between-logarithmic-and-exponential-functions/sssss3hz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-logarithmic-and-exponential-functions/sssss3hz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-logarithmic-and-exponential-functions/sssss3hz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-logarithmic-and-exponential-functions/sssss3hz"/>
      <lastmod>2026-11-01T21:31:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relationship-between-logarithmic-and-exponential-functions/sssss3hz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-logarithmic-and-exponential-functions/sssss3hz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-logarithmic-and-exponential-functions/sssss3hz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-logarithmic-and-exponential-functions/sssss3hz"/>
      <lastmod>2026-11-01T21:31:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-inclusive-v-exclusive-definitions/sssss3h0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-inclusive-v-exclusive-definitions/sssss3h0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-inclusive-v-exclusive-definitions/sssss3h0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-inclusive-v-exclusive-definitions/sssss3h0"/>
      <lastmod>2026-11-02T02:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-inclusive-v-exclusive-definitions/sssss3h0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-inclusive-v-exclusive-definitions/sssss3h0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-inclusive-v-exclusive-definitions/sssss3h0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-inclusive-v-exclusive-definitions/sssss3h0"/>
      <lastmod>2026-11-02T02:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/super-mario-and-matrix-addition-visualizing-matrix-operations-with-pixel-art/sssss3hd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/super-mario-and-matrix-addition-visualizing-matrix-operations-with-pixel-art/sssss3hd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/super-mario-and-matrix-addition-visualizing-matrix-operations-with-pixel-art/sssss3hd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/super-mario-and-matrix-addition-visualizing-matrix-operations-with-pixel-art/sssss3hd"/>
      <lastmod>2026-11-01T20:47:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/super-mario-and-matrix-addition-visualizing-matrix-operations-with-pixel-art/sssss3hd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/super-mario-and-matrix-addition-visualizing-matrix-operations-with-pixel-art/sssss3hd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/super-mario-and-matrix-addition-visualizing-matrix-operations-with-pixel-art/sssss3hd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/super-mario-and-matrix-addition-visualizing-matrix-operations-with-pixel-art/sssss3hd"/>
      <lastmod>2026-11-01T20:47:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-points-on-a-circle-simulating-probability/sssss3hf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-points-on-a-circle-simulating-probability/sssss3hf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-points-on-a-circle-simulating-probability/sssss3hf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-points-on-a-circle-simulating-probability/sssss3hf"/>
      <lastmod>2026-11-01T19:24:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-points-on-a-circle-simulating-probability/sssss3hf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-points-on-a-circle-simulating-probability/sssss3hf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-points-on-a-circle-simulating-probability/sssss3hf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-points-on-a-circle-simulating-probability/sssss3hf"/>
      <lastmod>2026-11-01T19:24:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chladni-plate-animation/sssss3h8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chladni-plate-animation/sssss3h8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chladni-plate-animation/sssss3h8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chladni-plate-animation/sssss3h8"/>
      <lastmod>2026-11-02T12:40:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chladni-plate-animation/sssss3h8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chladni-plate-animation/sssss3h8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chladni-plate-animation/sssss3h8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chladni-plate-animation/sssss3h8"/>
      <lastmod>2026-11-02T12:40:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coplanar-points/sssss3hu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coplanar-points/sssss3hu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coplanar-points/sssss3hu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coplanar-points/sssss3hu"/>
      <lastmod>2026-11-02T12:28:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coplanar-points/sssss3hu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coplanar-points/sssss3hu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coplanar-points/sssss3hu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coplanar-points/sssss3hu"/>
      <lastmod>2026-11-02T12:28:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/edges-are-amazing/sssss3h5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/edges-are-amazing/sssss3h5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/edges-are-amazing/sssss3h5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/edges-are-amazing/sssss3h5"/>
      <lastmod>2026-11-01T19:21:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/edges-are-amazing/sssss3h5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/edges-are-amazing/sssss3h5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/edges-are-amazing/sssss3h5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/edges-are-amazing/sssss3h5"/>
      <lastmod>2026-11-01T19:21:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/labq9-geometric-construction-example/sssss3hb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/labq9-geometric-construction-example/sssss3hb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/labq9-geometric-construction-example/sssss3hb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/labq9-geometric-construction-example/sssss3hb"/>
      <lastmod>2026-11-02T13:58:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/labq9-geometric-construction-example/sssss3hb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/labq9-geometric-construction-example/sssss3hb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/labq9-geometric-construction-example/sssss3hb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/labq9-geometric-construction-example/sssss3hb"/>
      <lastmod>2026-11-02T13:58:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-of-circles/sssss3h3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-of-circles/sssss3h3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-of-circles/sssss3h3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-of-circles/sssss3h3"/>
      <lastmod>2026-11-01T23:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-of-circles/sssss3h3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-of-circles/sssss3h3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-of-circles/sssss3h3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-of-circles/sssss3h3"/>
      <lastmod>2026-11-01T23:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-inside-sphere/sssss3hq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-inside-sphere/sssss3hq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-inside-sphere/sssss3hq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-inside-sphere/sssss3hq"/>
      <lastmod>2026-11-01T21:56:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-inside-sphere/sssss3hq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-inside-sphere/sssss3hq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-inside-sphere/sssss3hq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-inside-sphere/sssss3hq"/>
      <lastmod>2026-11-01T21:56:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-segment-copy/sssss3h1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-copy/sssss3h1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-copy/sssss3h1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-copy/sssss3h1"/>
      <lastmod>2026-11-01T21:26:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-segment-copy/sssss3h1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-copy/sssss3h1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-copy/sssss3h1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-copy/sssss3h1"/>
      <lastmod>2026-11-01T21:26:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-parallelograms-definitions-and-properties/sssss3hm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-parallelograms-definitions-and-properties/sssss3hm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-parallelograms-definitions-and-properties/sssss3hm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-parallelograms-definitions-and-properties/sssss3hm"/>
      <lastmod>2026-11-02T16:48:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-parallelograms-definitions-and-properties/sssss3hm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-parallelograms-definitions-and-properties/sssss3hm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-parallelograms-definitions-and-properties/sssss3hm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-parallelograms-definitions-and-properties/sssss3hm"/>
      <lastmod>2026-11-02T16:48:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triple-a-line-segment/sssss3hj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triple-a-line-segment/sssss3hj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triple-a-line-segment/sssss3hj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triple-a-line-segment/sssss3hj"/>
      <lastmod>2026-11-01T23:51:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triple-a-line-segment/sssss3hj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triple-a-line-segment/sssss3hj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triple-a-line-segment/sssss3hj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triple-a-line-segment/sssss3hj"/>
      <lastmod>2026-11-01T23:51:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scalar-multiplication-of-a-vector/sssss3hp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalar-multiplication-of-a-vector/sssss3hp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalar-multiplication-of-a-vector/sssss3hp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalar-multiplication-of-a-vector/sssss3hp"/>
      <lastmod>2026-11-02T00:29:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scalar-multiplication-of-a-vector/sssss3hp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalar-multiplication-of-a-vector/sssss3hp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalar-multiplication-of-a-vector/sssss3hp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalar-multiplication-of-a-vector/sssss3hp"/>
      <lastmod>2026-11-02T00:29:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-and-cylinder-volume-relationship-demo/sssss3hw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-cylinder-volume-relationship-demo/sssss3hw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-cylinder-volume-relationship-demo/sssss3hw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-cylinder-volume-relationship-demo/sssss3hw"/>
      <lastmod>2026-11-01T19:32:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-and-cylinder-volume-relationship-demo/sssss3hw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-cylinder-volume-relationship-demo/sssss3hw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-cylinder-volume-relationship-demo/sssss3hw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-cylinder-volume-relationship-demo/sssss3hw"/>
      <lastmod>2026-11-01T19:32:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-midsegment-investigation/sssss3h6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-investigation/sssss3h6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-midsegment-investigation/sssss3h6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-investigation/sssss3h6"/>
      <lastmod>2026-11-01T23:49:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-midsegment-investigation/sssss3h6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-investigation/sssss3h6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-midsegment-investigation/sssss3h6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-investigation/sssss3h6"/>
      <lastmod>2026-11-01T23:49:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-a-cube-and-a-plane/sssss3hg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-cube-and-a-plane/sssss3hg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-cube-and-a-plane/sssss3hg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-cube-and-a-plane/sssss3hg"/>
      <lastmod>2026-11-01T20:56:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-a-cube-and-a-plane/sssss3hg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-cube-and-a-plane/sssss3hg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-cube-and-a-plane/sssss3hg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-cube-and-a-plane/sssss3hg"/>
      <lastmod>2026-11-01T20:56:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/candy-bar-fraction-measurement/sssss3h9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/candy-bar-fraction-measurement/sssss3h9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/candy-bar-fraction-measurement/sssss3h9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/candy-bar-fraction-measurement/sssss3h9"/>
      <lastmod>2026-11-02T02:46:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/candy-bar-fraction-measurement/sssss3h9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/candy-bar-fraction-measurement/sssss3h9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/candy-bar-fraction-measurement/sssss3h9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/candy-bar-fraction-measurement/sssss3h9"/>
      <lastmod>2026-11-02T02:46:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-fibonacci-sequence/sssss3he</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-fibonacci-sequence/sssss3he"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-fibonacci-sequence/sssss3he"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-fibonacci-sequence/sssss3he"/>
      <lastmod>2026-11-01T23:57:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-fibonacci-sequence/sssss3he</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-fibonacci-sequence/sssss3he"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-fibonacci-sequence/sssss3he"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-fibonacci-sequence/sssss3he"/>
      <lastmod>2026-11-01T23:57:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadric-surfaces-demo-by-muhammad-zia-afzal/sssss3hv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadric-surfaces-demo-by-muhammad-zia-afzal/sssss3hv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadric-surfaces-demo-by-muhammad-zia-afzal/sssss3hv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadric-surfaces-demo-by-muhammad-zia-afzal/sssss3hv"/>
      <lastmod>2026-11-02T02:35:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadric-surfaces-demo-by-muhammad-zia-afzal/sssss3hv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadric-surfaces-demo-by-muhammad-zia-afzal/sssss3hv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadric-surfaces-demo-by-muhammad-zia-afzal/sssss3hv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadric-surfaces-demo-by-muhammad-zia-afzal/sssss3hv"/>
      <lastmod>2026-11-02T02:35:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-addition-postulate-demo/sssss3h4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-demo/sssss3h4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-addition-postulate-demo/sssss3h4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-demo/sssss3h4"/>
      <lastmod>2026-11-02T18:53:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-addition-postulate-demo/sssss3h4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-demo/sssss3h4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-addition-postulate-demo/sssss3h4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-demo/sssss3h4"/>
      <lastmod>2026-11-02T18:53:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinate-game/sssss3hl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-game/sssss3hl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-game/sssss3hl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-game/sssss3hl"/>
      <lastmod>2026-11-01T19:27:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinate-game/sssss3hl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-game/sssss3hl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-game/sssss3hl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-game/sssss3hl"/>
      <lastmod>2026-11-01T19:27:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-factor-of-quadratic-functions/sssss3hy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-factor-of-quadratic-functions/sssss3hy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-factor-of-quadratic-functions/sssss3hy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-factor-of-quadratic-functions/sssss3hy"/>
      <lastmod>2026-11-02T02:38:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-factor-of-quadratic-functions/sssss3hy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-factor-of-quadratic-functions/sssss3hy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-factor-of-quadratic-functions/sssss3hy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-factor-of-quadratic-functions/sssss3hy"/>
      <lastmod>2026-11-02T02:38:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polyhedrons-with-reflections/sssss3ha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polyhedrons-with-reflections/sssss3ha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polyhedrons-with-reflections/sssss3ha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polyhedrons-with-reflections/sssss3ha"/>
      <lastmod>2026-11-01T21:46:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polyhedrons-with-reflections/sssss3ha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polyhedrons-with-reflections/sssss3ha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polyhedrons-with-reflections/sssss3ha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polyhedrons-with-reflections/sssss3ha"/>
      <lastmod>2026-11-01T21:46:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/imaginary-parabola/sssss3hc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/imaginary-parabola/sssss3hc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/imaginary-parabola/sssss3hc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/imaginary-parabola/sssss3hc"/>
      <lastmod>2026-11-01T21:09:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/imaginary-parabola/sssss3hc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/imaginary-parabola/sssss3hc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/imaginary-parabola/sssss3hc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/imaginary-parabola/sssss3hc"/>
      <lastmod>2026-11-01T21:09:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/self-moving-vector/sssss3hr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/self-moving-vector/sssss3hr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/self-moving-vector/sssss3hr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/self-moving-vector/sssss3hr"/>
      <lastmod>2026-11-01T23:49:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/self-moving-vector/sssss3hr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/self-moving-vector/sssss3hr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/self-moving-vector/sssss3hr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/self-moving-vector/sssss3hr"/>
      <lastmod>2026-11-01T23:49:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-equal-widths-by-tom-carpenter/sssss3hh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-equal-widths-by-tom-carpenter/sssss3hh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-equal-widths-by-tom-carpenter/sssss3hh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-equal-widths-by-tom-carpenter/sssss3hh"/>
      <lastmod>2026-11-02T18:11:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-equal-widths-by-tom-carpenter/sssss3hh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-equal-widths-by-tom-carpenter/sssss3hh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-equal-widths-by-tom-carpenter/sssss3hh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-equal-widths-by-tom-carpenter/sssss3hh"/>
      <lastmod>2026-11-02T18:11:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-folding-demonstration/sssss3ht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-folding-demonstration/sssss3ht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-folding-demonstration/sssss3ht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-folding-demonstration/sssss3ht"/>
      <lastmod>2026-11-02T09:47:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-folding-demonstration/sssss3ht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-folding-demonstration/sssss3ht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-folding-demonstration/sssss3ht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-folding-demonstration/sssss3ht"/>
      <lastmod>2026-11-02T09:47:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gradient-of-exponential-function-at-x-0/sssss3hx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-of-exponential-function-at-x-0/sssss3hx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-of-exponential-function-at-x-0/sssss3hx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-of-exponential-function-at-x-0/sssss3hx"/>
      <lastmod>2026-11-02T17:39:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gradient-of-exponential-function-at-x-0/sssss3hx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-of-exponential-function-at-x-0/sssss3hx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-of-exponential-function-at-x-0/sssss3hx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-of-exponential-function-at-x-0/sssss3hx"/>
      <lastmod>2026-11-02T17:39:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-of-forming-an-acute-triangle-by-random-point-generation/sssss3hi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-of-forming-an-acute-triangle-by-random-point-generation/sssss3hi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-of-forming-an-acute-triangle-by-random-point-generation/sssss3hi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-of-forming-an-acute-triangle-by-random-point-generation/sssss3hi"/>
      <lastmod>2026-11-02T00:15:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-of-forming-an-acute-triangle-by-random-point-generation/sssss3hi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-of-forming-an-acute-triangle-by-random-point-generation/sssss3hi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-of-forming-an-acute-triangle-by-random-point-generation/sssss3hi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-of-forming-an-acute-triangle-by-random-point-generation/sssss3hi"/>
      <lastmod>2026-11-02T00:15:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squares-and-rectangles-by-rebecca-yeo/sssss3ho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-and-rectangles-by-rebecca-yeo/sssss3ho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-and-rectangles-by-rebecca-yeo/sssss3ho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-and-rectangles-by-rebecca-yeo/sssss3ho"/>
      <lastmod>2026-11-02T18:14:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/squares-and-rectangles-by-rebecca-yeo/sssss3ho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-and-rectangles-by-rebecca-yeo/sssss3ho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-and-rectangles-by-rebecca-yeo/sssss3ho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-and-rectangles-by-rebecca-yeo/sssss3ho"/>
      <lastmod>2026-11-02T18:14:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-and-symmetry-george-v/sssss3ts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-symmetry-george-v/sssss3ts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-symmetry-george-v/sssss3ts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-symmetry-george-v/sssss3ts"/>
      <lastmod>2026-11-02T18:29:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-and-symmetry-george-v/sssss3ts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-symmetry-george-v/sssss3ts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-symmetry-george-v/sssss3ts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-symmetry-george-v/sssss3ts"/>
      <lastmod>2026-11-02T18:29:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractal-curve-6/sssss3t7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-curve-6/sssss3t7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-curve-6/sssss3t7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-curve-6/sssss3t7"/>
      <lastmod>2026-11-01T21:14:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractal-curve-6/sssss3t7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-curve-6/sssss3t7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-curve-6/sssss3t7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-curve-6/sssss3t7"/>
      <lastmod>2026-11-01T21:14:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-to-construct-an-equilateral-triangle/sssss3tn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-to-construct-an-equilateral-triangle/sssss3tn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-to-construct-an-equilateral-triangle/sssss3tn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-to-construct-an-equilateral-triangle/sssss3tn"/>
      <lastmod>2026-11-01T19:10:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-to-construct-an-equilateral-triangle/sssss3tn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-to-construct-an-equilateral-triangle/sssss3tn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-to-construct-an-equilateral-triangle/sssss3tn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-to-construct-an-equilateral-triangle/sssss3tn"/>
      <lastmod>2026-11-01T19:10:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-construction-step-by-step/sssss3t2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-construction-step-by-step/sssss3t2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-construction-step-by-step/sssss3t2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-construction-step-by-step/sssss3t2"/>
      <lastmod>2026-11-01T23:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-construction-step-by-step/sssss3t2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-construction-step-by-step/sssss3t2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-construction-step-by-step/sssss3t2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-construction-step-by-step/sssss3t2"/>
      <lastmod>2026-11-01T23:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-worksheet-graphical-exploration-of-function-limits/sssss3tk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-worksheet-graphical-exploration-of-function-limits/sssss3tk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-worksheet-graphical-exploration-of-function-limits/sssss3tk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-worksheet-graphical-exploration-of-function-limits/sssss3tk"/>
      <lastmod>2026-11-02T11:53:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-worksheet-graphical-exploration-of-function-limits/sssss3tk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-worksheet-graphical-exploration-of-function-limits/sssss3tk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-worksheet-graphical-exploration-of-function-limits/sssss3tk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-worksheet-graphical-exploration-of-function-limits/sssss3tk"/>
      <lastmod>2026-11-02T11:53:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-division-demonstration-by-christine-ho/sssss3tz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-division-demonstration-by-christine-ho/sssss3tz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-division-demonstration-by-christine-ho/sssss3tz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-division-demonstration-by-christine-ho/sssss3tz"/>
      <lastmod>2026-11-01T21:05:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-division-demonstration-by-christine-ho/sssss3tz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-division-demonstration-by-christine-ho/sssss3tz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-division-demonstration-by-christine-ho/sssss3tz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-division-demonstration-by-christine-ho/sssss3tz"/>
      <lastmod>2026-11-01T21:05:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-inequation-solutions/sssss3t0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-inequation-solutions/sssss3t0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-inequation-solutions/sssss3t0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-inequation-solutions/sssss3t0"/>
      <lastmod>2026-11-01T19:28:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-inequation-solutions/sssss3t0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-inequation-solutions/sssss3t0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-inequation-solutions/sssss3t0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-inequation-solutions/sssss3t0"/>
      <lastmod>2026-11-01T19:28:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-multiplication-demo/sssss3td</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-multiplication-demo/sssss3td"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-multiplication-demo/sssss3td"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-multiplication-demo/sssss3td"/>
      <lastmod>2026-11-01T21:31:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-multiplication-demo/sssss3td</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-multiplication-demo/sssss3td"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-multiplication-demo/sssss3td"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-multiplication-demo/sssss3td"/>
      <lastmod>2026-11-01T21:31:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plot-the-reflection/sssss3tf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plot-the-reflection/sssss3tf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plot-the-reflection/sssss3tf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plot-the-reflection/sssss3tf"/>
      <lastmod>2026-11-02T18:38:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plot-the-reflection/sssss3tf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plot-the-reflection/sssss3tf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plot-the-reflection/sssss3tf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plot-the-reflection/sssss3tf"/>
      <lastmod>2026-11-02T18:38:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinate-geometry-interpreting-graphs-of-proportional-relationships/sssss3t8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-geometry-interpreting-graphs-of-proportional-relationships/sssss3t8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-geometry-interpreting-graphs-of-proportional-relationships/sssss3t8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-geometry-interpreting-graphs-of-proportional-relationships/sssss3t8"/>
      <lastmod>2026-11-02T10:37:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinate-geometry-interpreting-graphs-of-proportional-relationships/sssss3t8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-geometry-interpreting-graphs-of-proportional-relationships/sssss3t8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-geometry-interpreting-graphs-of-proportional-relationships/sssss3t8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-geometry-interpreting-graphs-of-proportional-relationships/sssss3t8"/>
      <lastmod>2026-11-02T10:37:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/activity-2-messing-with-mona-introduction-to-transformations/sssss3tu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-2-messing-with-mona-introduction-to-transformations/sssss3tu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-2-messing-with-mona-introduction-to-transformations/sssss3tu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-2-messing-with-mona-introduction-to-transformations/sssss3tu"/>
      <lastmod>2026-11-01T21:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/activity-2-messing-with-mona-introduction-to-transformations/sssss3tu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-2-messing-with-mona-introduction-to-transformations/sssss3tu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-2-messing-with-mona-introduction-to-transformations/sssss3tu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-2-messing-with-mona-introduction-to-transformations/sssss3tu"/>
      <lastmod>2026-11-01T21:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-interior-and-exterior-angle-sum-exploration/sssss3t5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-interior-and-exterior-angle-sum-exploration/sssss3t5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-interior-and-exterior-angle-sum-exploration/sssss3t5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-interior-and-exterior-angle-sum-exploration/sssss3t5"/>
      <lastmod>2026-11-01T21:08:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-interior-and-exterior-angle-sum-exploration/sssss3t5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-interior-and-exterior-angle-sum-exploration/sssss3t5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-interior-and-exterior-angle-sum-exploration/sssss3t5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-interior-and-exterior-angle-sum-exploration/sssss3t5"/>
      <lastmod>2026-11-01T21:08:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-and-plane-position-relationship-geogebra/sssss3tb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-and-plane-position-relationship-geogebra/sssss3tb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-and-plane-position-relationship-geogebra/sssss3tb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-and-plane-position-relationship-geogebra/sssss3tb"/>
      <lastmod>2026-11-02T07:27:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-and-plane-position-relationship-geogebra/sssss3tb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-and-plane-position-relationship-geogebra/sssss3tb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-and-plane-position-relationship-geogebra/sssss3tb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-and-plane-position-relationship-geogebra/sssss3tb"/>
      <lastmod>2026-11-02T07:27:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/illustration-of-volume-as-a-set-of-nested-cylinders-copy/sssss3t3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/illustration-of-volume-as-a-set-of-nested-cylinders-copy/sssss3t3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/illustration-of-volume-as-a-set-of-nested-cylinders-copy/sssss3t3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/illustration-of-volume-as-a-set-of-nested-cylinders-copy/sssss3t3"/>
      <lastmod>2026-11-01T21:30:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/illustration-of-volume-as-a-set-of-nested-cylinders-copy/sssss3t3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/illustration-of-volume-as-a-set-of-nested-cylinders-copy/sssss3t3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/illustration-of-volume-as-a-set-of-nested-cylinders-copy/sssss3t3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/illustration-of-volume-as-a-set-of-nested-cylinders-copy/sssss3t3"/>
      <lastmod>2026-11-01T21:30:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/elastic-rubber-band-and-gerono-lemniscate/sssss3tq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elastic-rubber-band-and-gerono-lemniscate/sssss3tq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elastic-rubber-band-and-gerono-lemniscate/sssss3tq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elastic-rubber-band-and-gerono-lemniscate/sssss3tq"/>
      <lastmod>2026-11-02T18:34:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/elastic-rubber-band-and-gerono-lemniscate/sssss3tq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elastic-rubber-band-and-gerono-lemniscate/sssss3tq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elastic-rubber-band-and-gerono-lemniscate/sssss3tq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elastic-rubber-band-and-gerono-lemniscate/sssss3tq"/>
      <lastmod>2026-11-02T18:34:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-around-the-y-axis/sssss3t1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-around-the-y-axis/sssss3t1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-around-the-y-axis/sssss3t1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-around-the-y-axis/sssss3t1"/>
      <lastmod>2026-11-01T20:54:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-around-the-y-axis/sssss3t1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-around-the-y-axis/sssss3t1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-around-the-y-axis/sssss3t1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-around-the-y-axis/sssss3t1"/>
      <lastmod>2026-11-01T20:54:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sample-means/sssss3tm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-means/sssss3tm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-means/sssss3tm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-means/sssss3tm"/>
      <lastmod>2026-11-01T21:09:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sample-means/sssss3tm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-means/sssss3tm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-means/sssss3tm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-means/sssss3tm"/>
      <lastmod>2026-11-01T21:09:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-demonstration/sssss3tj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demonstration/sssss3tj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demonstration/sssss3tj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demonstration/sssss3tj"/>
      <lastmod>2026-11-02T18:44:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-demonstration/sssss3tj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demonstration/sssss3tj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demonstration/sssss3tj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demonstration/sssss3tj"/>
      <lastmod>2026-11-02T18:44:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/defining-an-ellipse-by-foci-and-sum-of-distances/sssss3tp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-an-ellipse-by-foci-and-sum-of-distances/sssss3tp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-an-ellipse-by-foci-and-sum-of-distances/sssss3tp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-an-ellipse-by-foci-and-sum-of-distances/sssss3tp"/>
      <lastmod>2026-11-01T23:27:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/defining-an-ellipse-by-foci-and-sum-of-distances/sssss3tp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-an-ellipse-by-foci-and-sum-of-distances/sssss3tp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-an-ellipse-by-foci-and-sum-of-distances/sssss3tp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-an-ellipse-by-foci-and-sum-of-distances/sssss3tp"/>
      <lastmod>2026-11-01T23:27:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-in-2-directions/sssss3tw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-in-2-directions/sssss3tw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-in-2-directions/sssss3tw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-in-2-directions/sssss3tw"/>
      <lastmod>2026-11-01T23:57:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-in-2-directions/sssss3tw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-in-2-directions/sssss3tw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-in-2-directions/sssss3tw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-in-2-directions/sssss3tw"/>
      <lastmod>2026-11-01T23:57:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-and-surface-area-of-pyramids/sssss3t6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-pyramids/sssss3t6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-surface-area-of-pyramids/sssss3t6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-pyramids/sssss3t6"/>
      <lastmod>2026-11-01T19:17:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-and-surface-area-of-pyramids/sssss3t6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-pyramids/sssss3t6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-surface-area-of-pyramids/sssss3t6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-pyramids/sssss3t6"/>
      <lastmod>2026-11-01T19:17:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-division-1-5-3-demonstration/sssss3tg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-division-1-5-3-demonstration/sssss3tg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-division-1-5-3-demonstration/sssss3tg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-division-1-5-3-demonstration/sssss3tg"/>
      <lastmod>2026-11-01T23:35:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-division-1-5-3-demonstration/sssss3tg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-division-1-5-3-demonstration/sssss3tg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-division-1-5-3-demonstration/sssss3tg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-division-1-5-3-demonstration/sssss3tg"/>
      <lastmod>2026-11-01T23:35:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/stereographic-projection-conformal-mapping-from-sphere-to-plane/sssss3t9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stereographic-projection-conformal-mapping-from-sphere-to-plane/sssss3t9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stereographic-projection-conformal-mapping-from-sphere-to-plane/sssss3t9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stereographic-projection-conformal-mapping-from-sphere-to-plane/sssss3t9"/>
      <lastmod>2026-11-01T19:25:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/stereographic-projection-conformal-mapping-from-sphere-to-plane/sssss3t9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stereographic-projection-conformal-mapping-from-sphere-to-plane/sssss3t9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stereographic-projection-conformal-mapping-from-sphere-to-plane/sssss3t9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stereographic-projection-conformal-mapping-from-sphere-to-plane/sssss3t9"/>
      <lastmod>2026-11-01T19:25:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-translation-rotation/sssss3te</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-translation-rotation/sssss3te"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-translation-rotation/sssss3te"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-translation-rotation/sssss3te"/>
      <lastmod>2026-11-02T03:11:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-translation-rotation/sssss3te</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-translation-rotation/sssss3te"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-translation-rotation/sssss3te"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-translation-rotation/sssss3te"/>
      <lastmod>2026-11-02T03:11:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-incircle-construction-and-calculations/sssss3tv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-incircle-construction-and-calculations/sssss3tv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-incircle-construction-and-calculations/sssss3tv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-incircle-construction-and-calculations/sssss3tv"/>
      <lastmod>2026-11-02T02:54:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-incircle-construction-and-calculations/sssss3tv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-incircle-construction-and-calculations/sssss3tv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-incircle-construction-and-calculations/sssss3tv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-incircle-construction-and-calculations/sssss3tv"/>
      <lastmod>2026-11-02T02:54:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-about-x-axis-example/sssss3t4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-about-x-axis-example/sssss3t4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solid-of-revolution-about-x-axis-example/sssss3t4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-about-x-axis-example/sssss3t4"/>
      <lastmod>2026-11-02T18:09:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-solid-of-revolution-about-x-axis-example/sssss3t4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-about-x-axis-example/sssss3t4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solid-of-revolution-about-x-axis-example/sssss3t4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-about-x-axis-example/sssss3t4"/>
      <lastmod>2026-11-02T18:09:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bryan-johnson-s-triangle-theorem/sssss3tl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bryan-johnson-s-triangle-theorem/sssss3tl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bryan-johnson-s-triangle-theorem/sssss3tl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bryan-johnson-s-triangle-theorem/sssss3tl"/>
      <lastmod>2026-11-01T21:22:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bryan-johnson-s-triangle-theorem/sssss3tl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bryan-johnson-s-triangle-theorem/sssss3tl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bryan-johnson-s-triangle-theorem/sssss3tl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bryan-johnson-s-triangle-theorem/sssss3tl"/>
      <lastmod>2026-11-01T21:22:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploration-of-inverse-of-quadratic-functions/sssss3ty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-of-inverse-of-quadratic-functions/sssss3ty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-of-inverse-of-quadratic-functions/sssss3ty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-of-inverse-of-quadratic-functions/sssss3ty"/>
      <lastmod>2026-11-02T13:50:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploration-of-inverse-of-quadratic-functions/sssss3ty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-of-inverse-of-quadratic-functions/sssss3ty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-of-inverse-of-quadratic-functions/sssss3ty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-of-inverse-of-quadratic-functions/sssss3ty"/>
      <lastmod>2026-11-02T13:50:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-of-parabola-and-light/sssss3ta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-of-parabola-and-light/sssss3ta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-of-parabola-and-light/sssss3ta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-of-parabola-and-light/sssss3ta"/>
      <lastmod>2026-11-02T17:05:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-of-parabola-and-light/sssss3ta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-of-parabola-and-light/sssss3ta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-of-parabola-and-light/sssss3ta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-of-parabola-and-light/sssss3ta"/>
      <lastmod>2026-11-02T17:05:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-spreadsheet-tools/sssss3tc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-spreadsheet-tools/sssss3tc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-spreadsheet-tools/sssss3tc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-spreadsheet-tools/sssss3tc"/>
      <lastmod>2026-11-01T23:23:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-spreadsheet-tools/sssss3tc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-spreadsheet-tools/sssss3tc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-spreadsheet-tools/sssss3tc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-spreadsheet-tools/sssss3tc"/>
      <lastmod>2026-11-01T23:23:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/four-cylinders-by-philip/sssss3tr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/four-cylinders-by-philip/sssss3tr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/four-cylinders-by-philip/sssss3tr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/four-cylinders-by-philip/sssss3tr"/>
      <lastmod>2026-11-01T20:58:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/four-cylinders-by-philip/sssss3tr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/four-cylinders-by-philip/sssss3tr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/four-cylinders-by-philip/sssss3tr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/four-cylinders-by-philip/sssss3tr"/>
      <lastmod>2026-11-01T20:58:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-mapping-diagrams-to-understand-functions-and-equations/sssss3th</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-mapping-diagrams-to-understand-functions-and-equations/sssss3th"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-mapping-diagrams-to-understand-functions-and-equations/sssss3th"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-mapping-diagrams-to-understand-functions-and-equations/sssss3th"/>
      <lastmod>2026-11-02T18:40:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-mapping-diagrams-to-understand-functions-and-equations/sssss3th</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-mapping-diagrams-to-understand-functions-and-equations/sssss3th"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-mapping-diagrams-to-understand-functions-and-equations/sssss3th"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-mapping-diagrams-to-understand-functions-and-equations/sssss3th"/>
      <lastmod>2026-11-02T18:40:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-nth-roots-of-unity/sssss3tt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-nth-roots-of-unity/sssss3tt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-nth-roots-of-unity/sssss3tt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-nth-roots-of-unity/sssss3tt"/>
      <lastmod>2026-11-01T21:15:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-nth-roots-of-unity/sssss3tt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-nth-roots-of-unity/sssss3tt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-nth-roots-of-unity/sssss3tt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-nth-roots-of-unity/sssss3tt"/>
      <lastmod>2026-11-01T21:15:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/general-solution-for-symmetry-numbers-on-sphere/sssss3tx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-solution-for-symmetry-numbers-on-sphere/sssss3tx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-solution-for-symmetry-numbers-on-sphere/sssss3tx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-solution-for-symmetry-numbers-on-sphere/sssss3tx"/>
      <lastmod>2026-11-01T22:03:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/general-solution-for-symmetry-numbers-on-sphere/sssss3tx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-solution-for-symmetry-numbers-on-sphere/sssss3tx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-solution-for-symmetry-numbers-on-sphere/sssss3tx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-solution-for-symmetry-numbers-on-sphere/sssss3tx"/>
      <lastmod>2026-11-01T22:03:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angles-of-a-quadrilateral/sssss3ti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-a-quadrilateral/sssss3ti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-a-quadrilateral/sssss3ti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-a-quadrilateral/sssss3ti"/>
      <lastmod>2026-11-02T17:08:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angles-of-a-quadrilateral/sssss3ti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-a-quadrilateral/sssss3ti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-a-quadrilateral/sssss3ti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-a-quadrilateral/sssss3ti"/>
      <lastmod>2026-11-02T17:08:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-formula-demo/sssss3to</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-formula-demo/sssss3to"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-formula-demo/sssss3to"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-formula-demo/sssss3to"/>
      <lastmod>2026-11-01T20:41:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-formula-demo/sssss3to</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-formula-demo/sssss3to"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-formula-demo/sssss3to"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-formula-demo/sssss3to"/>
      <lastmod>2026-11-01T20:41:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euler-circle-and-feuerbach-circle-dynamic-construction/sssss3xs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-circle-and-feuerbach-circle-dynamic-construction/sssss3xs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-circle-and-feuerbach-circle-dynamic-construction/sssss3xs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-circle-and-feuerbach-circle-dynamic-construction/sssss3xs"/>
      <lastmod>2026-11-01T23:42:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euler-circle-and-feuerbach-circle-dynamic-construction/sssss3xs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-circle-and-feuerbach-circle-dynamic-construction/sssss3xs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-circle-and-feuerbach-circle-dynamic-construction/sssss3xs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-circle-and-feuerbach-circle-dynamic-construction/sssss3xs"/>
      <lastmod>2026-11-01T23:42:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-polygons-template/sssss3x7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygons-template/sssss3x7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygons-template/sssss3x7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygons-template/sssss3x7"/>
      <lastmod>2026-11-02T00:18:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-polygons-template/sssss3x7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygons-template/sssss3x7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygons-template/sssss3x7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygons-template/sssss3x7"/>
      <lastmod>2026-11-02T00:18:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-nicoleshibata/sssss3xn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-nicoleshibata/sssss3xn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-nicoleshibata/sssss3xn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-nicoleshibata/sssss3xn"/>
      <lastmod>2026-11-01T21:09:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-nicoleshibata/sssss3xn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-nicoleshibata/sssss3xn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-nicoleshibata/sssss3xn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-nicoleshibata/sssss3xn"/>
      <lastmod>2026-11-01T21:09:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/abstract-concepts-and-practice-constructing-islamic-geometric-patterns/sssss3x2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/abstract-concepts-and-practice-constructing-islamic-geometric-patterns/sssss3x2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/abstract-concepts-and-practice-constructing-islamic-geometric-patterns/sssss3x2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/abstract-concepts-and-practice-constructing-islamic-geometric-patterns/sssss3x2"/>
      <lastmod>2026-11-01T21:03:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/abstract-concepts-and-practice-constructing-islamic-geometric-patterns/sssss3x2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/abstract-concepts-and-practice-constructing-islamic-geometric-patterns/sssss3x2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/abstract-concepts-and-practice-constructing-islamic-geometric-patterns/sssss3x2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/abstract-concepts-and-practice-constructing-islamic-geometric-patterns/sssss3x2"/>
      <lastmod>2026-11-01T21:03:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-representation-of-complex-roots-by-wendy-fresh/sssss3xk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-representation-of-complex-roots-by-wendy-fresh/sssss3xk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-representation-of-complex-roots-by-wendy-fresh/sssss3xk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-representation-of-complex-roots-by-wendy-fresh/sssss3xk"/>
      <lastmod>2026-11-02T18:40:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-representation-of-complex-roots-by-wendy-fresh/sssss3xk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-representation-of-complex-roots-by-wendy-fresh/sssss3xk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-representation-of-complex-roots-by-wendy-fresh/sssss3xk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-representation-of-complex-roots-by-wendy-fresh/sssss3xk"/>
      <lastmod>2026-11-02T18:40:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inverse-function-of-exponential-function/sssss3xz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-function-of-exponential-function/sssss3xz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-function-of-exponential-function/sssss3xz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-function-of-exponential-function/sssss3xz"/>
      <lastmod>2026-11-02T14:58:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inverse-function-of-exponential-function/sssss3xz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-function-of-exponential-function/sssss3xz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-function-of-exponential-function/sssss3xz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-function-of-exponential-function/sssss3xz"/>
      <lastmod>2026-11-02T14:58:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-4/sssss3x0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-4/sssss3x0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan-4/sssss3x0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-4/sssss3x0"/>
      <lastmod>2026-11-02T17:56:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan-4/sssss3x0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-4/sssss3x0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan-4/sssss3x0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-4/sssss3x0"/>
      <lastmod>2026-11-02T17:56:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperboloid-of-one-sheet-as-a-locus/sssss3xd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloid-of-one-sheet-as-a-locus/sssss3xd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloid-of-one-sheet-as-a-locus/sssss3xd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloid-of-one-sheet-as-a-locus/sssss3xd"/>
      <lastmod>2026-11-02T18:01:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperboloid-of-one-sheet-as-a-locus/sssss3xd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloid-of-one-sheet-as-a-locus/sssss3xd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloid-of-one-sheet-as-a-locus/sssss3xd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloid-of-one-sheet-as-a-locus/sssss3xd"/>
      <lastmod>2026-11-02T18:01:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-upside-down-pyramid/sssss3xf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-upside-down-pyramid/sssss3xf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-upside-down-pyramid/sssss3xf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-upside-down-pyramid/sssss3xf"/>
      <lastmod>2026-11-02T17:03:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-upside-down-pyramid/sssss3xf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-upside-down-pyramid/sssss3xf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-upside-down-pyramid/sssss3xf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-upside-down-pyramid/sssss3xf"/>
      <lastmod>2026-11-02T17:03:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dissect-one-square-into-three-squares/sssss3x8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dissect-one-square-into-three-squares/sssss3x8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dissect-one-square-into-three-squares/sssss3x8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dissect-one-square-into-three-squares/sssss3x8"/>
      <lastmod>2026-11-02T02:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dissect-one-square-into-three-squares/sssss3x8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dissect-one-square-into-three-squares/sssss3x8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dissect-one-square-into-three-squares/sssss3x8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dissect-one-square-into-three-squares/sssss3x8"/>
      <lastmod>2026-11-02T02:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-by-debra-schneider/sssss3xu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-debra-schneider/sssss3xu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-debra-schneider/sssss3xu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-debra-schneider/sssss3xu"/>
      <lastmod>2026-11-02T09:59:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-by-debra-schneider/sssss3xu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-debra-schneider/sssss3xu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-debra-schneider/sssss3xu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-debra-schneider/sssss3xu"/>
      <lastmod>2026-11-02T09:59:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introducing-limit-notation/sssss3x5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introducing-limit-notation/sssss3x5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introducing-limit-notation/sssss3x5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introducing-limit-notation/sssss3x5"/>
      <lastmod>2026-11-01T20:40:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introducing-limit-notation/sssss3x5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introducing-limit-notation/sssss3x5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introducing-limit-notation/sssss3x5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introducing-limit-notation/sssss3x5"/>
      <lastmod>2026-11-01T20:40:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-circumcenter-and-centroid-of-triangle/sssss3xb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-circumcenter-and-centroid-of-triangle/sssss3xb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-circumcenter-and-centroid-of-triangle/sssss3xb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-circumcenter-and-centroid-of-triangle/sssss3xb"/>
      <lastmod>2026-11-01T23:58:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-circumcenter-and-centroid-of-triangle/sssss3xb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-circumcenter-and-centroid-of-triangle/sssss3xb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-circumcenter-and-centroid-of-triangle/sssss3xb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-circumcenter-and-centroid-of-triangle/sssss3xb"/>
      <lastmod>2026-11-01T23:58:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-distance-from-a-point-on-the-perpendicular-bisector-to-the-endpoints-of-a-li/sssss3x3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-distance-from-a-point-on-the-perpendicular-bisector-to-the-endpoints-of-a-li/sssss3x3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-distance-from-a-point-on-the-perpendicular-bisector-to-the-endpoints-of-a-li/sssss3x3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-distance-from-a-point-on-the-perpendicular-bisector-to-the-endpoints-of-a-li/sssss3x3"/>
      <lastmod>2026-11-01T23:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-distance-from-a-point-on-the-perpendicular-bisector-to-the-endpoints-of-a-li/sssss3x3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-distance-from-a-point-on-the-perpendicular-bisector-to-the-endpoints-of-a-li/sssss3x3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-distance-from-a-point-on-the-perpendicular-bisector-to-the-endpoints-of-a-li/sssss3x3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-distance-from-a-point-on-the-perpendicular-bisector-to-the-endpoints-of-a-li/sssss3x3"/>
      <lastmod>2026-11-01T23:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oresme-proposition-1-interactive-3d-vector-and-kite-geometry-exploration/sssss3xq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oresme-proposition-1-interactive-3d-vector-and-kite-geometry-exploration/sssss3xq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oresme-proposition-1-interactive-3d-vector-and-kite-geometry-exploration/sssss3xq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oresme-proposition-1-interactive-3d-vector-and-kite-geometry-exploration/sssss3xq"/>
      <lastmod>2026-11-02T17:37:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oresme-proposition-1-interactive-3d-vector-and-kite-geometry-exploration/sssss3xq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oresme-proposition-1-interactive-3d-vector-and-kite-geometry-exploration/sssss3xq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oresme-proposition-1-interactive-3d-vector-and-kite-geometry-exploration/sssss3xq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oresme-proposition-1-interactive-3d-vector-and-kite-geometry-exploration/sssss3xq"/>
      <lastmod>2026-11-02T17:37:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/is-the-pythagorean-theorem-only-useful-for-right-triangles/sssss3x1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/is-the-pythagorean-theorem-only-useful-for-right-triangles/sssss3x1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/is-the-pythagorean-theorem-only-useful-for-right-triangles/sssss3x1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/is-the-pythagorean-theorem-only-useful-for-right-triangles/sssss3x1"/>
      <lastmod>2026-11-02T16:59:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/is-the-pythagorean-theorem-only-useful-for-right-triangles/sssss3x1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/is-the-pythagorean-theorem-only-useful-for-right-triangles/sssss3x1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/is-the-pythagorean-theorem-only-useful-for-right-triangles/sssss3x1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/is-the-pythagorean-theorem-only-useful-for-right-triangles/sssss3x1"/>
      <lastmod>2026-11-02T16:59:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/second-order-implicit-function-locus/sssss3xm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/second-order-implicit-function-locus/sssss3xm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/second-order-implicit-function-locus/sssss3xm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/second-order-implicit-function-locus/sssss3xm"/>
      <lastmod>2026-11-02T17:37:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/second-order-implicit-function-locus/sssss3xm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/second-order-implicit-function-locus/sssss3xm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/second-order-implicit-function-locus/sssss3xm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/second-order-implicit-function-locus/sssss3xm"/>
      <lastmod>2026-11-02T17:37:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponents-product-rule-demo/sssss3xj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-product-rule-demo/sssss3xj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-product-rule-demo/sssss3xj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-product-rule-demo/sssss3xj"/>
      <lastmod>2026-11-02T16:52:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponents-product-rule-demo/sssss3xj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-product-rule-demo/sssss3xj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-product-rule-demo/sssss3xj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-product-rule-demo/sssss3xj"/>
      <lastmod>2026-11-02T16:52:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-exponents-by-angela-dwane-2/sssss3xp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-exponents-by-angela-dwane-2/sssss3xp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-exponents-by-angela-dwane-2/sssss3xp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-exponents-by-angela-dwane-2/sssss3xp"/>
      <lastmod>2026-11-02T02:35:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-exponents-by-angela-dwane-2/sssss3xp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-exponents-by-angela-dwane-2/sssss3xp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-exponents-by-angela-dwane-2/sssss3xp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-exponents-by-angela-dwane-2/sssss3xp"/>
      <lastmod>2026-11-02T02:35:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discovering-the-pythagorean-theorem-by-michael-powers/sssss3xw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovering-the-pythagorean-theorem-by-michael-powers/sssss3xw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovering-the-pythagorean-theorem-by-michael-powers/sssss3xw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovering-the-pythagorean-theorem-by-michael-powers/sssss3xw"/>
      <lastmod>2026-11-01T20:51:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discovering-the-pythagorean-theorem-by-michael-powers/sssss3xw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovering-the-pythagorean-theorem-by-michael-powers/sssss3xw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovering-the-pythagorean-theorem-by-michael-powers/sssss3xw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovering-the-pythagorean-theorem-by-michael-powers/sssss3xw"/>
      <lastmod>2026-11-01T20:51:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/epitrochoid-dynamic-construction-and-parameter-exploration/sssss3x6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/epitrochoid-dynamic-construction-and-parameter-exploration/sssss3x6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/epitrochoid-dynamic-construction-and-parameter-exploration/sssss3x6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/epitrochoid-dynamic-construction-and-parameter-exploration/sssss3x6"/>
      <lastmod>2026-11-02T02:45:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/epitrochoid-dynamic-construction-and-parameter-exploration/sssss3x6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/epitrochoid-dynamic-construction-and-parameter-exploration/sssss3x6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/epitrochoid-dynamic-construction-and-parameter-exploration/sssss3x6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/epitrochoid-dynamic-construction-and-parameter-exploration/sssss3x6"/>
      <lastmod>2026-11-02T02:45:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-two-vectors-in-3d/sssss3xg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-two-vectors-in-3d/sssss3xg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-two-vectors-in-3d/sssss3xg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-two-vectors-in-3d/sssss3xg"/>
      <lastmod>2026-11-01T21:05:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-two-vectors-in-3d/sssss3xg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-two-vectors-in-3d/sssss3xg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-two-vectors-in-3d/sssss3xg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-two-vectors-in-3d/sssss3xg"/>
      <lastmod>2026-11-01T21:05:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-trace-demo/sssss3x9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-trace-demo/sssss3x9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-trace-demo/sssss3x9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-trace-demo/sssss3x9"/>
      <lastmod>2026-11-01T21:19:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-trace-demo/sssss3x9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-trace-demo/sssss3x9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-trace-demo/sssss3x9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-trace-demo/sssss3x9"/>
      <lastmod>2026-11-01T21:19:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-generator-for-basic-absolute-value-inequalities/sssss3xe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-generator-for-basic-absolute-value-inequalities/sssss3xe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-generator-for-basic-absolute-value-inequalities/sssss3xe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-generator-for-basic-absolute-value-inequalities/sssss3xe"/>
      <lastmod>2026-11-02T11:52:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-generator-for-basic-absolute-value-inequalities/sssss3xe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-generator-for-basic-absolute-value-inequalities/sssss3xe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-generator-for-basic-absolute-value-inequalities/sssss3xe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-generator-for-basic-absolute-value-inequalities/sssss3xe"/>
      <lastmod>2026-11-02T11:52:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-flame-and-fractions/sssss3xv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-flame-and-fractions/sssss3xv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-flame-and-fractions/sssss3xv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-flame-and-fractions/sssss3xv"/>
      <lastmod>2026-11-02T18:00:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-flame-and-fractions/sssss3xv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-flame-and-fractions/sssss3xv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-flame-and-fractions/sssss3xv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-flame-and-fractions/sssss3xv"/>
      <lastmod>2026-11-02T18:00:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/need-for-exponential-functions-data-fitting-and-visualization/sssss3x4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/need-for-exponential-functions-data-fitting-and-visualization/sssss3x4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/need-for-exponential-functions-data-fitting-and-visualization/sssss3x4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/need-for-exponential-functions-data-fitting-and-visualization/sssss3x4"/>
      <lastmod>2026-11-02T18:45:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/need-for-exponential-functions-data-fitting-and-visualization/sssss3x4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/need-for-exponential-functions-data-fitting-and-visualization/sssss3x4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/need-for-exponential-functions-data-fitting-and-visualization/sssss3x4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/need-for-exponential-functions-data-fitting-and-visualization/sssss3x4"/>
      <lastmod>2026-11-02T18:45:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-stand-geometric-construction-and-stochastic-simulation/sssss3xl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-stand-geometric-construction-and-stochastic-simulation/sssss3xl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-stand-geometric-construction-and-stochastic-simulation/sssss3xl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-stand-geometric-construction-and-stochastic-simulation/sssss3xl"/>
      <lastmod>2026-11-02T18:37:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-stand-geometric-construction-and-stochastic-simulation/sssss3xl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-stand-geometric-construction-and-stochastic-simulation/sssss3xl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-stand-geometric-construction-and-stochastic-simulation/sssss3xl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-stand-geometric-construction-and-stochastic-simulation/sssss3xl"/>
      <lastmod>2026-11-02T18:37:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-cone/sssss3xy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cone/sssss3xy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cone/sssss3xy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cone/sssss3xy"/>
      <lastmod>2026-11-02T18:58:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-cone/sssss3xy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cone/sssss3xy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cone/sssss3xy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cone/sssss3xy"/>
      <lastmod>2026-11-02T18:58:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-corresponding-angles/sssss3xa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-corresponding-angles/sssss3xa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-corresponding-angles/sssss3xa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-corresponding-angles/sssss3xa"/>
      <lastmod>2026-11-01T21:52:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-corresponding-angles/sssss3xa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-corresponding-angles/sssss3xa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-corresponding-angles/sssss3xa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-corresponding-angles/sssss3xa"/>
      <lastmod>2026-11-01T21:52:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-intersecting-planes-in-3d-space/sssss3xc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-intersecting-planes-in-3d-space/sssss3xc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-intersecting-planes-in-3d-space/sssss3xc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-intersecting-planes-in-3d-space/sssss3xc"/>
      <lastmod>2026-11-01T23:14:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-intersecting-planes-in-3d-space/sssss3xc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-intersecting-planes-in-3d-space/sssss3xc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-intersecting-planes-in-3d-space/sssss3xc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-intersecting-planes-in-3d-space/sssss3xc"/>
      <lastmod>2026-11-01T23:14:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-fractions-by-melissa-2/sssss3xr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-melissa-2/sssss3xr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-by-melissa-2/sssss3xr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-melissa-2/sssss3xr"/>
      <lastmod>2026-11-01T20:55:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-fractions-by-melissa-2/sssss3xr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-melissa-2/sssss3xr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-by-melissa-2/sssss3xr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-melissa-2/sssss3xr"/>
      <lastmod>2026-11-01T20:55:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-square-based-pyramid/sssss3xh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-square-based-pyramid/sssss3xh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-square-based-pyramid/sssss3xh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-square-based-pyramid/sssss3xh"/>
      <lastmod>2026-11-01T21:34:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-square-based-pyramid/sssss3xh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-square-based-pyramid/sssss3xh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-square-based-pyramid/sssss3xh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-square-based-pyramid/sssss3xh"/>
      <lastmod>2026-11-01T21:34:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-8-1-7-lesson-no-bending-or-stretching/sssss3xt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-1-7-lesson-no-bending-or-stretching/sssss3xt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-1-7-lesson-no-bending-or-stretching/sssss3xt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-1-7-lesson-no-bending-or-stretching/sssss3xt"/>
      <lastmod>2026-11-02T02:12:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-8-1-7-lesson-no-bending-or-stretching/sssss3xt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-1-7-lesson-no-bending-or-stretching/sssss3xt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-1-7-lesson-no-bending-or-stretching/sssss3xt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-1-7-lesson-no-bending-or-stretching/sssss3xt"/>
      <lastmod>2026-11-02T02:12:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dse2019q19-geometric-construction-of-circles-and-polygons/sssss3xx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dse2019q19-geometric-construction-of-circles-and-polygons/sssss3xx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dse2019q19-geometric-construction-of-circles-and-polygons/sssss3xx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dse2019q19-geometric-construction-of-circles-and-polygons/sssss3xx"/>
      <lastmod>2026-11-01T19:09:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dse2019q19-geometric-construction-of-circles-and-polygons/sssss3xx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dse2019q19-geometric-construction-of-circles-and-polygons/sssss3xx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dse2019q19-geometric-construction-of-circles-and-polygons/sssss3xx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dse2019q19-geometric-construction-of-circles-and-polygons/sssss3xx"/>
      <lastmod>2026-11-01T19:09:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-inequalities-on-a-number-line/sssss3xi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-inequalities-on-a-number-line/sssss3xi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-inequalities-on-a-number-line/sssss3xi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-inequalities-on-a-number-line/sssss3xi"/>
      <lastmod>2026-11-02T15:47:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-inequalities-on-a-number-line/sssss3xi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-inequalities-on-a-number-line/sssss3xi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-inequalities-on-a-number-line/sssss3xi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-inequalities-on-a-number-line/sssss3xi"/>
      <lastmod>2026-11-02T15:47:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-relationships-with-tables/sssss3xo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-relationships-with-tables/sssss3xo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-relationships-with-tables/sssss3xo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-relationships-with-tables/sssss3xo"/>
      <lastmod>2026-11-01T20:33:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-relationships-with-tables/sssss3xo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-relationships-with-tables/sssss3xo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-relationships-with-tables/sssss3xo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-relationships-with-tables/sssss3xo"/>
      <lastmod>2026-11-01T20:33:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-space-demonstration/sssss3is</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-space-demonstration/sssss3is"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-space-demonstration/sssss3is"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-space-demonstration/sssss3is"/>
      <lastmod>2026-11-01T23:32:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-space-demonstration/sssss3is</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-space-demonstration/sssss3is"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-space-demonstration/sssss3is"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-space-demonstration/sssss3is"/>
      <lastmod>2026-11-01T23:32:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-function-and-derivative-demo/sssss3i7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-and-derivative-demo/sssss3i7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-and-derivative-demo/sssss3i7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-and-derivative-demo/sssss3i7"/>
      <lastmod>2026-11-01T23:32:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-function-and-derivative-demo/sssss3i7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-and-derivative-demo/sssss3i7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-and-derivative-demo/sssss3i7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-and-derivative-demo/sssss3i7"/>
      <lastmod>2026-11-01T23:32:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/v-s-rectangular-and-polar-coordinates/sssss3in</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/v-s-rectangular-and-polar-coordinates/sssss3in"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/v-s-rectangular-and-polar-coordinates/sssss3in"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/v-s-rectangular-and-polar-coordinates/sssss3in"/>
      <lastmod>2026-11-02T12:57:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/v-s-rectangular-and-polar-coordinates/sssss3in</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/v-s-rectangular-and-polar-coordinates/sssss3in"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/v-s-rectangular-and-polar-coordinates/sssss3in"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/v-s-rectangular-and-polar-coordinates/sssss3in"/>
      <lastmod>2026-11-02T12:57:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-two-planes-by-alex-chik/sssss3i2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-alex-chik/sssss3i2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-by-alex-chik/sssss3i2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-alex-chik/sssss3i2"/>
      <lastmod>2026-11-02T03:16:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-two-planes-by-alex-chik/sssss3i2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-alex-chik/sssss3i2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-by-alex-chik/sssss3i2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-alex-chik/sssss3i2"/>
      <lastmod>2026-11-02T03:16:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-linear-regression-by-shayne-a-stedman/sssss3ik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-linear-regression-by-shayne-a-stedman/sssss3ik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-linear-regression-by-shayne-a-stedman/sssss3ik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-linear-regression-by-shayne-a-stedman/sssss3ik"/>
      <lastmod>2026-11-01T19:05:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-linear-regression-by-shayne-a-stedman/sssss3ik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-linear-regression-by-shayne-a-stedman/sssss3ik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-linear-regression-by-shayne-a-stedman/sssss3ik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-linear-regression-by-shayne-a-stedman/sssss3ik"/>
      <lastmod>2026-11-01T19:05:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-hyperbola/sssss3iz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-hyperbola/sssss3iz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-hyperbola/sssss3iz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-hyperbola/sssss3iz"/>
      <lastmod>2026-11-02T03:17:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-hyperbola/sssss3iz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-hyperbola/sssss3iz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-hyperbola/sssss3iz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-hyperbola/sssss3iz"/>
      <lastmod>2026-11-02T03:17:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cumulative-distribution-function-for-continuous-uniform-distribution/sssss3i0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cumulative-distribution-function-for-continuous-uniform-distribution/sssss3i0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cumulative-distribution-function-for-continuous-uniform-distribution/sssss3i0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cumulative-distribution-function-for-continuous-uniform-distribution/sssss3i0"/>
      <lastmod>2026-11-02T16:57:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cumulative-distribution-function-for-continuous-uniform-distribution/sssss3i0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cumulative-distribution-function-for-continuous-uniform-distribution/sssss3i0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cumulative-distribution-function-for-continuous-uniform-distribution/sssss3i0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cumulative-distribution-function-for-continuous-uniform-distribution/sssss3i0"/>
      <lastmod>2026-11-02T16:57:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-section-of-a-sphere-dynamic-geometry-exploration/sssss3id</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-sphere-dynamic-geometry-exploration/sssss3id"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-sphere-dynamic-geometry-exploration/sssss3id"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-sphere-dynamic-geometry-exploration/sssss3id"/>
      <lastmod>2026-11-02T17:59:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-section-of-a-sphere-dynamic-geometry-exploration/sssss3id</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-sphere-dynamic-geometry-exploration/sssss3id"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-sphere-dynamic-geometry-exploration/sssss3id"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-sphere-dynamic-geometry-exploration/sssss3id"/>
      <lastmod>2026-11-02T17:59:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-area-exploration/sssss3if</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-exploration/sssss3if"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-exploration/sssss3if"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-exploration/sssss3if"/>
      <lastmod>2026-11-02T08:41:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-area-exploration/sssss3if</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-exploration/sssss3if"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-exploration/sssss3if"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-exploration/sssss3if"/>
      <lastmod>2026-11-02T08:41:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-domain-and-range-using-line-segments/sssss3i8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-domain-and-range-using-line-segments/sssss3i8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-domain-and-range-using-line-segments/sssss3i8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-domain-and-range-using-line-segments/sssss3i8"/>
      <lastmod>2026-11-02T15:44:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-domain-and-range-using-line-segments/sssss3i8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-domain-and-range-using-line-segments/sssss3i8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-domain-and-range-using-line-segments/sssss3i8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-domain-and-range-using-line-segments/sssss3i8"/>
      <lastmod>2026-11-02T15:44:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/golden-rhombus/sssss3iu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-rhombus/sssss3iu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/golden-rhombus/sssss3iu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/golden-rhombus/sssss3iu"/>
      <lastmod>2026-11-01T23:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/golden-rhombus/sssss3iu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-rhombus/sssss3iu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/golden-rhombus/sssss3iu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/golden-rhombus/sssss3iu"/>
      <lastmod>2026-11-01T23:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solve-oblique-quick-quiz/sssss3i5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-oblique-quick-quiz/sssss3i5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-oblique-quick-quiz/sssss3i5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-oblique-quick-quiz/sssss3i5"/>
      <lastmod>2026-11-01T23:35:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solve-oblique-quick-quiz/sssss3i5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-oblique-quick-quiz/sssss3i5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-oblique-quick-quiz/sssss3i5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-oblique-quick-quiz/sssss3i5"/>
      <lastmod>2026-11-01T23:35:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/harrison-3-point-shot-and-parabolas/sssss3ib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harrison-3-point-shot-and-parabolas/sssss3ib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harrison-3-point-shot-and-parabolas/sssss3ib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harrison-3-point-shot-and-parabolas/sssss3ib"/>
      <lastmod>2026-11-02T17:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/harrison-3-point-shot-and-parabolas/sssss3ib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harrison-3-point-shot-and-parabolas/sssss3ib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harrison-3-point-shot-and-parabolas/sssss3ib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harrison-3-point-shot-and-parabolas/sssss3ib"/>
      <lastmod>2026-11-02T17:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-equivalent-ratio-problems-with-geogebra/sssss3i3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-equivalent-ratio-problems-with-geogebra/sssss3i3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-equivalent-ratio-problems-with-geogebra/sssss3i3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-equivalent-ratio-problems-with-geogebra/sssss3i3"/>
      <lastmod>2026-11-01T20:37:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-equivalent-ratio-problems-with-geogebra/sssss3i3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-equivalent-ratio-problems-with-geogebra/sssss3i3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-equivalent-ratio-problems-with-geogebra/sssss3i3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-equivalent-ratio-problems-with-geogebra/sssss3i3"/>
      <lastmod>2026-11-01T20:37:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/match-subtraction-and-division-expressions-to-words-pr2-01-p3-q4/sssss3iq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/match-subtraction-and-division-expressions-to-words-pr2-01-p3-q4/sssss3iq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/match-subtraction-and-division-expressions-to-words-pr2-01-p3-q4/sssss3iq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/match-subtraction-and-division-expressions-to-words-pr2-01-p3-q4/sssss3iq"/>
      <lastmod>2026-11-02T13:36:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/match-subtraction-and-division-expressions-to-words-pr2-01-p3-q4/sssss3iq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/match-subtraction-and-division-expressions-to-words-pr2-01-p3-q4/sssss3iq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/match-subtraction-and-division-expressions-to-words-pr2-01-p3-q4/sssss3iq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/match-subtraction-and-division-expressions-to-words-pr2-01-p3-q4/sssss3iq"/>
      <lastmod>2026-11-02T13:36:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-and-triangle/sssss3i1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-triangle/sssss3i1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-triangle/sssss3i1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-triangle/sssss3i1"/>
      <lastmod>2026-11-01T19:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-and-triangle/sssss3i1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-triangle/sssss3i1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-triangle/sssss3i1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-triangle/sssss3i1"/>
      <lastmod>2026-11-01T19:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-and-distinct-planes/sssss3im</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-and-distinct-planes/sssss3im"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-and-distinct-planes/sssss3im"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-and-distinct-planes/sssss3im"/>
      <lastmod>2026-11-02T18:19:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-and-distinct-planes/sssss3im</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-and-distinct-planes/sssss3im"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-and-distinct-planes/sssss3im"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-and-distinct-planes/sssss3im"/>
      <lastmod>2026-11-02T18:19:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-of-constructing-a-triangle-from-a-segment/sssss3ij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-of-constructing-a-triangle-from-a-segment/sssss3ij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-of-constructing-a-triangle-from-a-segment/sssss3ij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-of-constructing-a-triangle-from-a-segment/sssss3ij"/>
      <lastmod>2026-11-01T19:08:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-of-constructing-a-triangle-from-a-segment/sssss3ij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-of-constructing-a-triangle-from-a-segment/sssss3ij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-of-constructing-a-triangle-from-a-segment/sssss3ij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-of-constructing-a-triangle-from-a-segment/sssss3ij"/>
      <lastmod>2026-11-01T19:08:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/efficiently-solving-inequalities/sssss3ip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/efficiently-solving-inequalities/sssss3ip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/efficiently-solving-inequalities/sssss3ip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/efficiently-solving-inequalities/sssss3ip"/>
      <lastmod>2026-11-02T10:36:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/efficiently-solving-inequalities/sssss3ip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/efficiently-solving-inequalities/sssss3ip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/efficiently-solving-inequalities/sssss3ip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/efficiently-solving-inequalities/sssss3ip"/>
      <lastmod>2026-11-02T10:36:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relationship-between-unit-circle-and-sine-cosine/sssss3iw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-unit-circle-and-sine-cosine/sssss3iw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-unit-circle-and-sine-cosine/sssss3iw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-unit-circle-and-sine-cosine/sssss3iw"/>
      <lastmod>2026-11-02T11:53:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relationship-between-unit-circle-and-sine-cosine/sssss3iw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-unit-circle-and-sine-cosine/sssss3iw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-unit-circle-and-sine-cosine/sssss3iw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-unit-circle-and-sine-cosine/sssss3iw"/>
      <lastmod>2026-11-02T11:53:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-derivative/sssss3i6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-derivative/sssss3i6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-derivative/sssss3i6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-derivative/sssss3i6"/>
      <lastmod>2026-11-02T16:45:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-derivative/sssss3i6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-derivative/sssss3i6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-derivative/sssss3i6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-derivative/sssss3i6"/>
      <lastmod>2026-11-02T16:45:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruence-transformations/sssss3ig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-transformations/sssss3ig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-transformations/sssss3ig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-transformations/sssss3ig"/>
      <lastmod>2026-11-01T23:21:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruence-transformations/sssss3ig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-transformations/sssss3ig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-transformations/sssss3ig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-transformations/sssss3ig"/>
      <lastmod>2026-11-01T23:21:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scatter-plot-and-best-fit-line-by-geogebra-team/sssss3i9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scatter-plot-and-best-fit-line-by-geogebra-team/sssss3i9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scatter-plot-and-best-fit-line-by-geogebra-team/sssss3i9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scatter-plot-and-best-fit-line-by-geogebra-team/sssss3i9"/>
      <lastmod>2026-11-02T17:36:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scatter-plot-and-best-fit-line-by-geogebra-team/sssss3i9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scatter-plot-and-best-fit-line-by-geogebra-team/sssss3i9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scatter-plot-and-best-fit-line-by-geogebra-team/sssss3i9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scatter-plot-and-best-fit-line-by-geogebra-team/sssss3i9"/>
      <lastmod>2026-11-02T17:36:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-interactive-demo/sssss3ie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-interactive-demo/sssss3ie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-interactive-demo/sssss3ie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-interactive-demo/sssss3ie"/>
      <lastmod>2026-11-02T18:33:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-interactive-demo/sssss3ie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-interactive-demo/sssss3ie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-interactive-demo/sssss3ie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-interactive-demo/sssss3ie"/>
      <lastmod>2026-11-02T18:33:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-kathryn-peake-2/sssss3iv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-kathryn-peake-2/sssss3iv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-calculation-by-kathryn-peake-2/sssss3iv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-kathryn-peake-2/sssss3iv"/>
      <lastmod>2026-11-02T18:02:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-area-calculation-by-kathryn-peake-2/sssss3iv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-kathryn-peake-2/sssss3iv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-calculation-by-kathryn-peake-2/sssss3iv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-kathryn-peake-2/sssss3iv"/>
      <lastmod>2026-11-02T18:02:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone/sssss3i4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone/sssss3i4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone/sssss3i4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone/sssss3i4"/>
      <lastmod>2026-11-01T19:30:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cone/sssss3i4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone/sssss3i4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone/sssss3i4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone/sssss3i4"/>
      <lastmod>2026-11-01T19:30:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-function-and-its-derivative/sssss3il</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-and-its-derivative/sssss3il"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-and-its-derivative/sssss3il"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-and-its-derivative/sssss3il"/>
      <lastmod>2026-11-01T19:31:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-function-and-its-derivative/sssss3il</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-and-its-derivative/sssss3il"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-and-its-derivative/sssss3il"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-and-its-derivative/sssss3il"/>
      <lastmod>2026-11-01T19:31:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slicing-a-triangular-prism/sssss3iy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-a-triangular-prism/sssss3iy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-a-triangular-prism/sssss3iy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-a-triangular-prism/sssss3iy"/>
      <lastmod>2026-11-02T09:29:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slicing-a-triangular-prism/sssss3iy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-a-triangular-prism/sssss3iy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-a-triangular-prism/sssss3iy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-a-triangular-prism/sssss3iy"/>
      <lastmod>2026-11-02T09:29:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-the-square-root-of-2-geometrically/sssss3ia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-square-root-of-2-geometrically/sssss3ia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-square-root-of-2-geometrically/sssss3ia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-square-root-of-2-geometrically/sssss3ia"/>
      <lastmod>2026-11-01T23:47:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-the-square-root-of-2-geometrically/sssss3ia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-square-root-of-2-geometrically/sssss3ia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-square-root-of-2-geometrically/sssss3ia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-square-root-of-2-geometrically/sssss3ia"/>
      <lastmod>2026-11-01T23:47:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagon-puzzle-exploring-polygons-and-symmetry-in-geometric-construction/sssss3ic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-puzzle-exploring-polygons-and-symmetry-in-geometric-construction/sssss3ic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-puzzle-exploring-polygons-and-symmetry-in-geometric-construction/sssss3ic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-puzzle-exploring-polygons-and-symmetry-in-geometric-construction/sssss3ic"/>
      <lastmod>2026-11-01T21:01:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagon-puzzle-exploring-polygons-and-symmetry-in-geometric-construction/sssss3ic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-puzzle-exploring-polygons-and-symmetry-in-geometric-construction/sssss3ic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-puzzle-exploring-polygons-and-symmetry-in-geometric-construction/sssss3ic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-puzzle-exploring-polygons-and-symmetry-in-geometric-construction/sssss3ic"/>
      <lastmod>2026-11-01T21:01:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-function-transformations-exploration/sssss3ir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-transformations-exploration/sssss3ir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-transformations-exploration/sssss3ir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-transformations-exploration/sssss3ir"/>
      <lastmod>2026-11-02T09:33:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-function-transformations-exploration/sssss3ir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-transformations-exploration/sssss3ir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-transformations-exploration/sssss3ir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-transformations-exploration/sssss3ir"/>
      <lastmod>2026-11-02T09:33:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-between-two-points-interactive-geogebra-example/sssss3ih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-two-points-interactive-geogebra-example/sssss3ih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-two-points-interactive-geogebra-example/sssss3ih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-two-points-interactive-geogebra-example/sssss3ih"/>
      <lastmod>2026-11-02T09:59:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-between-two-points-interactive-geogebra-example/sssss3ih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-two-points-interactive-geogebra-example/sssss3ih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-two-points-interactive-geogebra-example/sssss3ih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-two-points-interactive-geogebra-example/sssss3ih"/>
      <lastmod>2026-11-02T09:59:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-of-ln-x-around-x-axis/sssss3it</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-of-ln-x-around-x-axis/sssss3it"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-of-ln-x-around-x-axis/sssss3it"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-of-ln-x-around-x-axis/sssss3it"/>
      <lastmod>2026-11-02T13:14:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-of-ln-x-around-x-axis/sssss3it</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-of-ln-x-around-x-axis/sssss3it"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-of-ln-x-around-x-axis/sssss3it"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-of-ln-x-around-x-axis/sssss3it"/>
      <lastmod>2026-11-02T13:14:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-parallelogram-a-visual-construction/sssss3ix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-a-visual-construction/sssss3ix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-parallelogram-a-visual-construction/sssss3ix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-a-visual-construction/sssss3ix"/>
      <lastmod>2026-11-02T18:47:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-parallelogram-a-visual-construction/sssss3ix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-a-visual-construction/sssss3ix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-parallelogram-a-visual-construction/sssss3ix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-a-visual-construction/sssss3ix"/>
      <lastmod>2026-11-02T18:47:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-root-function-horizontal-translation/sssss3ii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-function-horizontal-translation/sssss3ii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-function-horizontal-translation/sssss3ii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-function-horizontal-translation/sssss3ii"/>
      <lastmod>2026-11-02T09:13:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-root-function-horizontal-translation/sssss3ii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-function-horizontal-translation/sssss3ii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-function-horizontal-translation/sssss3ii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-function-horizontal-translation/sssss3ii"/>
      <lastmod>2026-11-02T09:13:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-pie-chart/sssss3io</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-pie-chart/sssss3io"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-pie-chart/sssss3io"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-pie-chart/sssss3io"/>
      <lastmod>2026-11-01T20:45:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-pie-chart/sssss3io</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-pie-chart/sssss3io"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-pie-chart/sssss3io"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-pie-chart/sssss3io"/>
      <lastmod>2026-11-01T20:45:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-geometric-shapes/sssss3os</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-geometric-shapes/sssss3os"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-geometric-shapes/sssss3os"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-geometric-shapes/sssss3os"/>
      <lastmod>2026-11-02T00:09:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-geometric-shapes/sssss3os</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-geometric-shapes/sssss3os"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-geometric-shapes/sssss3os"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-geometric-shapes/sssss3os"/>
      <lastmod>2026-11-02T00:09:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-spiral-and-triangles-generalizing-a-logo-via-similarity-transformations/sssss3o7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-spiral-and-triangles-generalizing-a-logo-via-similarity-transformations/sssss3o7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-spiral-and-triangles-generalizing-a-logo-via-similarity-transformations/sssss3o7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-spiral-and-triangles-generalizing-a-logo-via-similarity-transformations/sssss3o7"/>
      <lastmod>2026-11-02T13:19:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-spiral-and-triangles-generalizing-a-logo-via-similarity-transformations/sssss3o7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-spiral-and-triangles-generalizing-a-logo-via-similarity-transformations/sssss3o7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-spiral-and-triangles-generalizing-a-logo-via-similarity-transformations/sssss3o7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-spiral-and-triangles-generalizing-a-logo-via-similarity-transformations/sssss3o7"/>
      <lastmod>2026-11-02T13:19:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/q-5-multi-step-translation-construction-with-linear-regression-and-tangents/sssss3on</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/q-5-multi-step-translation-construction-with-linear-regression-and-tangents/sssss3on"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/q-5-multi-step-translation-construction-with-linear-regression-and-tangents/sssss3on"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/q-5-multi-step-translation-construction-with-linear-regression-and-tangents/sssss3on"/>
      <lastmod>2026-11-02T00:25:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/q-5-multi-step-translation-construction-with-linear-regression-and-tangents/sssss3on</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/q-5-multi-step-translation-construction-with-linear-regression-and-tangents/sssss3on"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/q-5-multi-step-translation-construction-with-linear-regression-and-tangents/sssss3on"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/q-5-multi-step-translation-construction-with-linear-regression-and-tangents/sssss3on"/>
      <lastmod>2026-11-02T00:25:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diagonals-of-an-icosahedron/sssss3o2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-an-icosahedron/sssss3o2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-an-icosahedron/sssss3o2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-an-icosahedron/sssss3o2"/>
      <lastmod>2026-11-01T19:35:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diagonals-of-an-icosahedron/sssss3o2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-an-icosahedron/sssss3o2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-an-icosahedron/sssss3o2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-an-icosahedron/sssss3o2"/>
      <lastmod>2026-11-01T19:35:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-graph-transformation-1-radians/sssss3ok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-graph-transformation-1-radians/sssss3ok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-graph-transformation-1-radians/sssss3ok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-graph-transformation-1-radians/sssss3ok"/>
      <lastmod>2026-11-02T17:49:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-graph-transformation-1-radians/sssss3ok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-graph-transformation-1-radians/sssss3ok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-graph-transformation-1-radians/sssss3ok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-graph-transformation-1-radians/sssss3ok"/>
      <lastmod>2026-11-02T17:49:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-trapezoid/sssss3oz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-trapezoid/sssss3oz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-trapezoid/sssss3oz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-trapezoid/sssss3oz"/>
      <lastmod>2026-11-02T12:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-trapezoid/sssss3oz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-trapezoid/sssss3oz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-trapezoid/sssss3oz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-trapezoid/sssss3oz"/>
      <lastmod>2026-11-02T12:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-lines-and-angles-in-a-triangle-im-8-1-16-practice/sssss3o0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-and-angles-in-a-triangle-im-8-1-16-practice/sssss3o0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-and-angles-in-a-triangle-im-8-1-16-practice/sssss3o0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-and-angles-in-a-triangle-im-8-1-16-practice/sssss3o0"/>
      <lastmod>2026-11-01T20:31:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-lines-and-angles-in-a-triangle-im-8-1-16-practice/sssss3o0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-and-angles-in-a-triangle-im-8-1-16-practice/sssss3o0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-and-angles-in-a-triangle-im-8-1-16-practice/sssss3o0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-and-angles-in-a-triangle-im-8-1-16-practice/sssss3o0"/>
      <lastmod>2026-11-01T20:31:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-three-planes-demo/sssss3od</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-three-planes-demo/sssss3od"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-three-planes-demo/sssss3od"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-three-planes-demo/sssss3od"/>
      <lastmod>2026-11-02T15:15:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-three-planes-demo/sssss3od</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-three-planes-demo/sssss3od"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-three-planes-demo/sssss3od"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-three-planes-demo/sssss3od"/>
      <lastmod>2026-11-02T15:15:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sun-microsystems-logo-geometric-construction/sssss3of</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sun-microsystems-logo-geometric-construction/sssss3of"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sun-microsystems-logo-geometric-construction/sssss3of"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sun-microsystems-logo-geometric-construction/sssss3of"/>
      <lastmod>2026-11-01T21:42:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sun-microsystems-logo-geometric-construction/sssss3of</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sun-microsystems-logo-geometric-construction/sssss3of"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sun-microsystems-logo-geometric-construction/sssss3of"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sun-microsystems-logo-geometric-construction/sssss3of"/>
      <lastmod>2026-11-01T21:42:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-rotations-sequences-with-color-changes/sssss3o8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-rotations-sequences-with-color-changes/sssss3o8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-rotations-sequences-with-color-changes/sssss3o8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-rotations-sequences-with-color-changes/sssss3o8"/>
      <lastmod>2026-11-01T23:15:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-rotations-sequences-with-color-changes/sssss3o8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-rotations-sequences-with-color-changes/sssss3o8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-rotations-sequences-with-color-changes/sssss3o8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-rotations-sequences-with-color-changes/sssss3o8"/>
      <lastmod>2026-11-01T23:15:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-root-finder/sssss3ou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-finder/sssss3ou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-finder/sssss3ou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-finder/sssss3ou"/>
      <lastmod>2026-11-01T23:57:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-root-finder/sssss3ou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-finder/sssss3ou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-finder/sssss3ou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-finder/sssss3ou"/>
      <lastmod>2026-11-01T23:57:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-by-david-palsgrove/sssss3o5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-by-david-palsgrove/sssss3o5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-by-david-palsgrove/sssss3o5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-by-david-palsgrove/sssss3o5"/>
      <lastmod>2026-11-02T08:44:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-by-david-palsgrove/sssss3o5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-by-david-palsgrove/sssss3o5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-by-david-palsgrove/sssss3o5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-by-david-palsgrove/sssss3o5"/>
      <lastmod>2026-11-02T08:44:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-kurt-hoelsema/sssss3ob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-kurt-hoelsema/sssss3ob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-kurt-hoelsema/sssss3ob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-kurt-hoelsema/sssss3ob"/>
      <lastmod>2026-11-01T21:24:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-kurt-hoelsema/sssss3ob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-kurt-hoelsema/sssss3ob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-kurt-hoelsema/sssss3ob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-kurt-hoelsema/sssss3ob"/>
      <lastmod>2026-11-01T21:24:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/activity-2-the-basics-of-tangent/sssss3o3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-2-the-basics-of-tangent/sssss3o3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-2-the-basics-of-tangent/sssss3o3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-2-the-basics-of-tangent/sssss3o3"/>
      <lastmod>2026-11-02T18:23:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/activity-2-the-basics-of-tangent/sssss3o3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-2-the-basics-of-tangent/sssss3o3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-2-the-basics-of-tangent/sssss3o3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-2-the-basics-of-tangent/sssss3o3"/>
      <lastmod>2026-11-02T18:23:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-properties-demo-by-michael-rach/sssss3oq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-demo-by-michael-rach/sssss3oq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-demo-by-michael-rach/sssss3oq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-demo-by-michael-rach/sssss3oq"/>
      <lastmod>2026-11-02T03:03:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-properties-demo-by-michael-rach/sssss3oq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-demo-by-michael-rach/sssss3oq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-demo-by-michael-rach/sssss3oq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-demo-by-michael-rach/sssss3oq"/>
      <lastmod>2026-11-02T03:03:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-parametric-curve-from-three-planes/sssss3o1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-parametric-curve-from-three-planes/sssss3o1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-parametric-curve-from-three-planes/sssss3o1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-parametric-curve-from-three-planes/sssss3o1"/>
      <lastmod>2026-11-02T02:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-parametric-curve-from-three-planes/sssss3o1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-parametric-curve-from-three-planes/sssss3o1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-parametric-curve-from-three-planes/sssss3o1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-parametric-curve-from-three-planes/sssss3o1"/>
      <lastmod>2026-11-02T02:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eight-point-model-on-a-sphere-with-two-degrees-of-freedom-extended-version/sssss3om</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eight-point-model-on-a-sphere-with-two-degrees-of-freedom-extended-version/sssss3om"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eight-point-model-on-a-sphere-with-two-degrees-of-freedom-extended-version/sssss3om"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eight-point-model-on-a-sphere-with-two-degrees-of-freedom-extended-version/sssss3om"/>
      <lastmod>2026-11-01T21:17:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eight-point-model-on-a-sphere-with-two-degrees-of-freedom-extended-version/sssss3om</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eight-point-model-on-a-sphere-with-two-degrees-of-freedom-extended-version/sssss3om"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eight-point-model-on-a-sphere-with-two-degrees-of-freedom-extended-version/sssss3om"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eight-point-model-on-a-sphere-with-two-degrees-of-freedom-extended-version/sssss3om"/>
      <lastmod>2026-11-01T21:17:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-intersection-demo/sssss3oj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-intersection-demo/sssss3oj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-intersection-demo/sssss3oj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-intersection-demo/sssss3oj"/>
      <lastmod>2026-11-01T23:12:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-intersection-demo/sssss3oj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-intersection-demo/sssss3oj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-intersection-demo/sssss3oj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-intersection-demo/sssss3oj"/>
      <lastmod>2026-11-01T23:12:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-sequence-demo/sssss3op</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-demo/sssss3op"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-demo/sssss3op"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-demo/sssss3op"/>
      <lastmod>2026-11-02T18:13:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-sequence-demo/sssss3op</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-demo/sssss3op"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-demo/sssss3op"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-demo/sssss3op"/>
      <lastmod>2026-11-02T18:13:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-similar-right-triangles/sssss3ow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-similar-right-triangles/sssss3ow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-similar-right-triangles/sssss3ow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-similar-right-triangles/sssss3ow"/>
      <lastmod>2026-11-02T08:51:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-similar-right-triangles/sssss3ow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-similar-right-triangles/sssss3ow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-similar-right-triangles/sssss3ow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-similar-right-triangles/sssss3ow"/>
      <lastmod>2026-11-02T08:51:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-the-sine-curve-the-length-of-a-half-chord/sssss3o6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-the-sine-curve-the-length-of-a-half-chord/sssss3o6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-the-sine-curve-the-length-of-a-half-chord/sssss3o6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-the-sine-curve-the-length-of-a-half-chord/sssss3o6"/>
      <lastmod>2026-11-02T11:06:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-the-sine-curve-the-length-of-a-half-chord/sssss3o6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-the-sine-curve-the-length-of-a-half-chord/sssss3o6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-the-sine-curve-the-length-of-a-half-chord/sssss3o6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-the-sine-curve-the-length-of-a-half-chord/sssss3o6"/>
      <lastmod>2026-11-02T11:06:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-transformation/sssss3og</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-transformation/sssss3og"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-transformation/sssss3og"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-transformation/sssss3og"/>
      <lastmod>2026-11-01T23:22:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-transformation/sssss3og</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-transformation/sssss3og"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-transformation/sssss3og"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-transformation/sssss3og"/>
      <lastmod>2026-11-01T23:22:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circular-functions-and-ordinate-addition/sssss3o9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-functions-and-ordinate-addition/sssss3o9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-functions-and-ordinate-addition/sssss3o9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-functions-and-ordinate-addition/sssss3o9"/>
      <lastmod>2026-11-01T23:24:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circular-functions-and-ordinate-addition/sssss3o9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-functions-and-ordinate-addition/sssss3o9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-functions-and-ordinate-addition/sssss3o9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-functions-and-ordinate-addition/sssss3o9"/>
      <lastmod>2026-11-01T23:24:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-function-demonstration/sssss3oe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-function-demonstration/sssss3oe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-function-demonstration/sssss3oe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-function-demonstration/sssss3oe"/>
      <lastmod>2026-11-02T12:00:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-function-demonstration/sssss3oe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-function-demonstration/sssss3oe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-function-demonstration/sssss3oe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-function-demonstration/sssss3oe"/>
      <lastmod>2026-11-02T12:00:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-2-10-practice-introducing-graphs-of-proportional-relationships/sssss3ov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-2-10-practice-introducing-graphs-of-proportional-relationships/sssss3ov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-2-10-practice-introducing-graphs-of-proportional-relationships/sssss3ov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-2-10-practice-introducing-graphs-of-proportional-relationships/sssss3ov"/>
      <lastmod>2026-11-01T20:28:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-2-10-practice-introducing-graphs-of-proportional-relationships/sssss3ov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-2-10-practice-introducing-graphs-of-proportional-relationships/sssss3ov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-2-10-practice-introducing-graphs-of-proportional-relationships/sssss3ov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-2-10-practice-introducing-graphs-of-proportional-relationships/sssss3ov"/>
      <lastmod>2026-11-01T20:28:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubes-inside-the-dodecahedron/sssss3o4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubes-inside-the-dodecahedron/sssss3o4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubes-inside-the-dodecahedron/sssss3o4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubes-inside-the-dodecahedron/sssss3o4"/>
      <lastmod>2026-11-02T16:52:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubes-inside-the-dodecahedron/sssss3o4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubes-inside-the-dodecahedron/sssss3o4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubes-inside-the-dodecahedron/sssss3o4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubes-inside-the-dodecahedron/sssss3o4"/>
      <lastmod>2026-11-02T16:52:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-cube-by-sabine-berthold-pfalz/sssss3ol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-by-sabine-berthold-pfalz/sssss3ol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cube-by-sabine-berthold-pfalz/sssss3ol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-by-sabine-berthold-pfalz/sssss3ol"/>
      <lastmod>2026-11-01T21:59:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-cube-by-sabine-berthold-pfalz/sssss3ol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-by-sabine-berthold-pfalz/sssss3ol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cube-by-sabine-berthold-pfalz/sssss3ol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-by-sabine-berthold-pfalz/sssss3ol"/>
      <lastmod>2026-11-01T21:59:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-limits-approaching-circle-perimeter-and-area-via-inscribed-and-circumsc/sssss3oy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-limits-approaching-circle-perimeter-and-area-via-inscribed-and-circumsc/sssss3oy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-limits-approaching-circle-perimeter-and-area-via-inscribed-and-circumsc/sssss3oy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-limits-approaching-circle-perimeter-and-area-via-inscribed-and-circumsc/sssss3oy"/>
      <lastmod>2026-11-01T21:23:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-limits-approaching-circle-perimeter-and-area-via-inscribed-and-circumsc/sssss3oy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-limits-approaching-circle-perimeter-and-area-via-inscribed-and-circumsc/sssss3oy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-limits-approaching-circle-perimeter-and-area-via-inscribed-and-circumsc/sssss3oy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-limits-approaching-circle-perimeter-and-area-via-inscribed-and-circumsc/sssss3oy"/>
      <lastmod>2026-11-01T21:23:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/whistler-construction/sssss3oa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/whistler-construction/sssss3oa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/whistler-construction/sssss3oa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/whistler-construction/sssss3oa"/>
      <lastmod>2026-11-02T00:35:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/whistler-construction/sssss3oa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/whistler-construction/sssss3oa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/whistler-construction/sssss3oa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/whistler-construction/sssss3oa"/>
      <lastmod>2026-11-02T00:35:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trammel-triangle-ellipse-construction/sssss3oc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trammel-triangle-ellipse-construction/sssss3oc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trammel-triangle-ellipse-construction/sssss3oc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trammel-triangle-ellipse-construction/sssss3oc"/>
      <lastmod>2026-11-02T16:46:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trammel-triangle-ellipse-construction/sssss3oc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trammel-triangle-ellipse-construction/sssss3oc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trammel-triangle-ellipse-construction/sssss3oc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trammel-triangle-ellipse-construction/sssss3oc"/>
      <lastmod>2026-11-02T16:46:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-lines-transversal-alternate-interior-angles-investigation/sssss3or</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-transversal-alternate-interior-angles-investigation/sssss3or"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-transversal-alternate-interior-angles-investigation/sssss3or"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-transversal-alternate-interior-angles-investigation/sssss3or"/>
      <lastmod>2026-11-01T21:49:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-lines-transversal-alternate-interior-angles-investigation/sssss3or</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-transversal-alternate-interior-angles-investigation/sssss3or"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-transversal-alternate-interior-angles-investigation/sssss3or"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-transversal-alternate-interior-angles-investigation/sssss3or"/>
      <lastmod>2026-11-01T21:49:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perspective-tesseract-demonstration/sssss3oh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perspective-tesseract-demonstration/sssss3oh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perspective-tesseract-demonstration/sssss3oh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perspective-tesseract-demonstration/sssss3oh"/>
      <lastmod>2026-11-02T02:21:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perspective-tesseract-demonstration/sssss3oh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perspective-tesseract-demonstration/sssss3oh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perspective-tesseract-demonstration/sssss3oh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perspective-tesseract-demonstration/sssss3oh"/>
      <lastmod>2026-11-02T02:21:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/catenary/sssss3ot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/catenary/sssss3ot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/catenary/sssss3ot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/catenary/sssss3ot"/>
      <lastmod>2026-11-01T21:39:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/catenary/sssss3ot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/catenary/sssss3ot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/catenary/sssss3ot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/catenary/sssss3ot"/>
      <lastmod>2026-11-01T21:39:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagrams-and-notation/sssss3ox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagrams-and-notation/sssss3ox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagrams-and-notation/sssss3ox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagrams-and-notation/sssss3ox"/>
      <lastmod>2026-11-02T15:43:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagrams-and-notation/sssss3ox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagrams-and-notation/sssss3ox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagrams-and-notation/sssss3ox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagrams-and-notation/sssss3ox"/>
      <lastmod>2026-11-02T15:43:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-line-integer-addition/sssss3oi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-integer-addition/sssss3oi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-integer-addition/sssss3oi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-integer-addition/sssss3oi"/>
      <lastmod>2026-11-02T17:58:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-line-integer-addition/sssss3oi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-integer-addition/sssss3oi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-integer-addition/sssss3oi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-integer-addition/sssss3oi"/>
      <lastmod>2026-11-02T17:58:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-2/sssss3oo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-2/sssss3oo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-2/sssss3oo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-2/sssss3oo"/>
      <lastmod>2026-11-02T18:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-2/sssss3oo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-2/sssss3oo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-2/sssss3oo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-2/sssss3oo"/>
      <lastmod>2026-11-02T18:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-theorem-proof/sssssqss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-theorem-proof/sssssqss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-theorem-proof/sssssqss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-theorem-proof/sssssqss"/>
      <lastmod>2026-11-02T13:39:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-theorem-proof/sssssqss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-theorem-proof/sssssqss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-theorem-proof/sssssqss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-theorem-proof/sssssqss"/>
      <lastmod>2026-11-02T13:39:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-construction-and-demonstration/sssssqs7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-construction-and-demonstration/sssssqs7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-construction-and-demonstration/sssssqs7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-construction-and-demonstration/sssssqs7"/>
      <lastmod>2026-11-02T17:13:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-construction-and-demonstration/sssssqs7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-construction-and-demonstration/sssssqs7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-construction-and-demonstration/sssssqs7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-construction-and-demonstration/sssssqs7"/>
      <lastmod>2026-11-02T17:13:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-1/sssssqsn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-1/sssssqsn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-and-logarithmic-functions-1/sssssqsn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-1/sssssqsn"/>
      <lastmod>2026-11-02T15:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-and-logarithmic-functions-1/sssssqsn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-1/sssssqsn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-and-logarithmic-functions-1/sssssqsn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-1/sssssqsn"/>
      <lastmod>2026-11-02T15:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-by-courtney-guthrie/sssssqs2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-by-courtney-guthrie/sssssqs2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-by-courtney-guthrie/sssssqs2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-by-courtney-guthrie/sssssqs2"/>
      <lastmod>2026-11-02T17:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-by-courtney-guthrie/sssssqs2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-by-courtney-guthrie/sssssqs2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-by-courtney-guthrie/sssssqs2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-by-courtney-guthrie/sssssqs2"/>
      <lastmod>2026-11-02T17:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-constructions-with-ancient-tools/sssssqsk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-constructions-with-ancient-tools/sssssqsk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-constructions-with-ancient-tools/sssssqsk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-constructions-with-ancient-tools/sssssqsk"/>
      <lastmod>2026-11-02T09:55:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-constructions-with-ancient-tools/sssssqsk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-constructions-with-ancient-tools/sssssqsk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-constructions-with-ancient-tools/sssssqsk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-constructions-with-ancient-tools/sssssqsk"/>
      <lastmod>2026-11-02T09:55:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scored-practice-on-reflection-in-an-axis/sssssqsz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scored-practice-on-reflection-in-an-axis/sssssqsz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scored-practice-on-reflection-in-an-axis/sssssqsz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scored-practice-on-reflection-in-an-axis/sssssqsz"/>
      <lastmod>2026-11-02T06:50:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scored-practice-on-reflection-in-an-axis/sssssqsz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scored-practice-on-reflection-in-an-axis/sssssqsz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scored-practice-on-reflection-in-an-axis/sssssqsz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scored-practice-on-reflection-in-an-axis/sssssqsz"/>
      <lastmod>2026-11-02T06:50:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-circumference-im-7-3-3-practice/sssssqs0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-circumference-im-7-3-3-practice/sssssqs0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-circumference-im-7-3-3-practice/sssssqs0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-circumference-im-7-3-3-practice/sssssqs0"/>
      <lastmod>2026-11-01T20:29:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-circumference-im-7-3-3-practice/sssssqs0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-circumference-im-7-3-3-practice/sssssqs0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-circumference-im-7-3-3-practice/sssssqs0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-circumference-im-7-3-3-practice/sssssqs0"/>
      <lastmod>2026-11-01T20:29:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-area-and-perimeter/sssssqsd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-area-and-perimeter/sssssqsd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-area-and-perimeter/sssssqsd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-area-and-perimeter/sssssqsd"/>
      <lastmod>2026-11-01T23:18:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-area-and-perimeter/sssssqsd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-area-and-perimeter/sssssqsd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-area-and-perimeter/sssssqsd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-area-and-perimeter/sssssqsd"/>
      <lastmod>2026-11-01T23:18:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-construction-by-elishevacarl/sssssqsf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-elishevacarl/sssssqsf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-construction-by-elishevacarl/sssssqsf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-elishevacarl/sssssqsf"/>
      <lastmod>2026-11-02T12:25:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-construction-by-elishevacarl/sssssqsf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-elishevacarl/sssssqsf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-construction-by-elishevacarl/sssssqsf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-elishevacarl/sssssqsf"/>
      <lastmod>2026-11-02T12:25:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/newton-raphson-method/sssssqs8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/newton-raphson-method/sssssqs8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/newton-raphson-method/sssssqs8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/newton-raphson-method/sssssqs8"/>
      <lastmod>2026-11-02T02:49:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/newton-raphson-method/sssssqs8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/newton-raphson-method/sssssqs8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/newton-raphson-method/sssssqs8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/newton-raphson-method/sssssqs8"/>
      <lastmod>2026-11-02T02:49:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-the-derivative/sssssqsu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-the-derivative/sssssqsu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-the-derivative/sssssqsu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-the-derivative/sssssqsu"/>
      <lastmod>2026-11-02T17:41:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-the-derivative/sssssqsu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-the-derivative/sssssqsu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-the-derivative/sssssqsu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-the-derivative/sssssqsu"/>
      <lastmod>2026-11-02T17:41:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/first-3500-prime-numbers-on-polar-grid/sssssqs5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-3500-prime-numbers-on-polar-grid/sssssqs5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-3500-prime-numbers-on-polar-grid/sssssqs5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-3500-prime-numbers-on-polar-grid/sssssqs5"/>
      <lastmod>2026-11-01T19:11:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/first-3500-prime-numbers-on-polar-grid/sssssqs5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-3500-prime-numbers-on-polar-grid/sssssqs5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-3500-prime-numbers-on-polar-grid/sssssqs5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-3500-prime-numbers-on-polar-grid/sssssqs5"/>
      <lastmod>2026-11-01T19:11:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-ravi/sssssqsb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-ravi/sssssqsb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-a-system-of-linear-equations-by-ravi/sssssqsb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-ravi/sssssqsb"/>
      <lastmod>2026-11-01T23:58:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-a-system-of-linear-equations-by-ravi/sssssqsb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-ravi/sssssqsb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-a-system-of-linear-equations-by-ravi/sssssqsb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-ravi/sssssqsb"/>
      <lastmod>2026-11-01T23:58:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lorenz-attractor-by-juan-carlos-ponce-campuzano/sssssqs3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lorenz-attractor-by-juan-carlos-ponce-campuzano/sssssqs3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lorenz-attractor-by-juan-carlos-ponce-campuzano/sssssqs3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lorenz-attractor-by-juan-carlos-ponce-campuzano/sssssqs3"/>
      <lastmod>2026-11-02T17:03:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lorenz-attractor-by-juan-carlos-ponce-campuzano/sssssqs3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lorenz-attractor-by-juan-carlos-ponce-campuzano/sssssqs3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lorenz-attractor-by-juan-carlos-ponce-campuzano/sssssqs3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lorenz-attractor-by-juan-carlos-ponce-campuzano/sssssqs3"/>
      <lastmod>2026-11-02T17:03:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/duality-of-interesting-solids/sssssqsq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/duality-of-interesting-solids/sssssqsq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/duality-of-interesting-solids/sssssqsq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/duality-of-interesting-solids/sssssqsq"/>
      <lastmod>2026-11-01T22:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/duality-of-interesting-solids/sssssqsq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/duality-of-interesting-solids/sssssqsq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/duality-of-interesting-solids/sssssqsq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/duality-of-interesting-solids/sssssqsq"/>
      <lastmod>2026-11-01T22:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-rectangle-demo/sssssqs1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-rectangle-demo/sssssqs1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-rectangle-demo/sssssqs1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-rectangle-demo/sssssqs1"/>
      <lastmod>2026-11-01T23:49:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-rectangle-demo/sssssqs1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-rectangle-demo/sssssqs1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-rectangle-demo/sssssqs1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-rectangle-demo/sssssqs1"/>
      <lastmod>2026-11-01T23:49:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/example-qf-2-4/sssssqsm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-qf-2-4/sssssqsm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-qf-2-4/sssssqsm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-qf-2-4/sssssqsm"/>
      <lastmod>2026-11-02T07:07:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/example-qf-2-4/sssssqsm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-qf-2-4/sssssqsm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-qf-2-4/sssssqsm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-qf-2-4/sssssqsm"/>
      <lastmod>2026-11-02T07:07:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interior-angles-of-regular-polygons/sssssqsj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-angles-of-regular-polygons/sssssqsj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-angles-of-regular-polygons/sssssqsj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-angles-of-regular-polygons/sssssqsj"/>
      <lastmod>2026-11-01T20:58:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interior-angles-of-regular-polygons/sssssqsj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-angles-of-regular-polygons/sssssqsj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-angles-of-regular-polygons/sssssqsj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-angles-of-regular-polygons/sssssqsj"/>
      <lastmod>2026-11-01T20:58:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integrals-and-areas/sssssqsp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integrals-and-areas/sssssqsp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integrals-and-areas/sssssqsp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integrals-and-areas/sssssqsp"/>
      <lastmod>2026-11-01T22:08:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integrals-and-areas/sssssqsp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integrals-and-areas/sssssqsp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integrals-and-areas/sssssqsp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integrals-and-areas/sssssqsp"/>
      <lastmod>2026-11-01T22:08:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-introduction-practice/sssssqsw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-introduction-practice/sssssqsw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-introduction-practice/sssssqsw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-introduction-practice/sssssqsw"/>
      <lastmod>2026-11-01T19:15:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-introduction-practice/sssssqsw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-introduction-practice/sssssqsw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-introduction-practice/sssssqsw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-introduction-practice/sssssqsw"/>
      <lastmod>2026-11-01T19:15:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/index-division-demonstration/sssssqs6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/index-division-demonstration/sssssqs6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/index-division-demonstration/sssssqs6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/index-division-demonstration/sssssqs6"/>
      <lastmod>2026-11-02T17:00:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/index-division-demonstration/sssssqs6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/index-division-demonstration/sssssqs6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/index-division-demonstration/sssssqs6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/index-division-demonstration/sssssqs6"/>
      <lastmod>2026-11-02T17:00:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/borromean-rings-by-steve-phelps/sssssqsg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/borromean-rings-by-steve-phelps/sssssqsg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/borromean-rings-by-steve-phelps/sssssqsg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/borromean-rings-by-steve-phelps/sssssqsg"/>
      <lastmod>2026-11-02T18:34:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/borromean-rings-by-steve-phelps/sssssqsg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/borromean-rings-by-steve-phelps/sssssqsg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/borromean-rings-by-steve-phelps/sssssqsg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/borromean-rings-by-steve-phelps/sssssqsg"/>
      <lastmod>2026-11-02T18:34:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-and-modifiable-geometric-problem-illustration/sssssqs9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-and-modifiable-geometric-problem-illustration/sssssqs9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-and-modifiable-geometric-problem-illustration/sssssqs9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-and-modifiable-geometric-problem-illustration/sssssqs9"/>
      <lastmod>2026-11-02T16:47:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-and-modifiable-geometric-problem-illustration/sssssqs9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-and-modifiable-geometric-problem-illustration/sssssqs9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-and-modifiable-geometric-problem-illustration/sssssqs9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-and-modifiable-geometric-problem-illustration/sssssqs9"/>
      <lastmod>2026-11-02T16:47:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-exploration/sssssqse</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-exploration/sssssqse"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-exploration/sssssqse"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-exploration/sssssqse"/>
      <lastmod>2026-11-01T21:52:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-exploration/sssssqse</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-exploration/sssssqse"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-exploration/sssssqse"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-exploration/sssssqse"/>
      <lastmod>2026-11-01T21:52:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/creating-a-kite/sssssqsv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-a-kite/sssssqsv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-a-kite/sssssqsv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-a-kite/sssssqsv"/>
      <lastmod>2026-11-02T18:49:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/creating-a-kite/sssssqsv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-a-kite/sssssqsv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-a-kite/sssssqsv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-a-kite/sssssqsv"/>
      <lastmod>2026-11-02T18:49:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-vector-line-intersections/sssssqs4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vector-line-intersections/sssssqs4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vector-line-intersections/sssssqs4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vector-line-intersections/sssssqs4"/>
      <lastmod>2026-11-01T21:56:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-vector-line-intersections/sssssqs4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vector-line-intersections/sssssqs4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vector-line-intersections/sssssqs4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vector-line-intersections/sssssqs4"/>
      <lastmod>2026-11-01T21:56:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/class-activity-weights-of-boys-statistics/sssssqsl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/class-activity-weights-of-boys-statistics/sssssqsl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/class-activity-weights-of-boys-statistics/sssssqsl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/class-activity-weights-of-boys-statistics/sssssqsl"/>
      <lastmod>2026-11-01T19:23:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/class-activity-weights-of-boys-statistics/sssssqsl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/class-activity-weights-of-boys-statistics/sssssqsl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/class-activity-weights-of-boys-statistics/sssssqsl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/class-activity-weights-of-boys-statistics/sssssqsl"/>
      <lastmod>2026-11-01T19:23:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3-octahedron-constructing-a-regular-octahedron-in-3d/sssssqsy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3-octahedron-constructing-a-regular-octahedron-in-3d/sssssqsy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3-octahedron-constructing-a-regular-octahedron-in-3d/sssssqsy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3-octahedron-constructing-a-regular-octahedron-in-3d/sssssqsy"/>
      <lastmod>2026-11-01T21:57:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3-octahedron-constructing-a-regular-octahedron-in-3d/sssssqsy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3-octahedron-constructing-a-regular-octahedron-in-3d/sssssqsy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3-octahedron-constructing-a-regular-octahedron-in-3d/sssssqsy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3-octahedron-constructing-a-regular-octahedron-in-3d/sssssqsy"/>
      <lastmod>2026-11-01T21:57:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-exploration-of-circles-and-ellipses-1-1/sssssqsa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-exploration-of-circles-and-ellipses-1-1/sssssqsa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-exploration-of-circles-and-ellipses-1-1/sssssqsa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-exploration-of-circles-and-ellipses-1-1/sssssqsa"/>
      <lastmod>2026-11-02T18:52:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-exploration-of-circles-and-ellipses-1-1/sssssqsa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-exploration-of-circles-and-ellipses-1-1/sssssqsa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-exploration-of-circles-and-ellipses-1-1/sssssqsa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-exploration-of-circles-and-ellipses-1-1/sssssqsa"/>
      <lastmod>2026-11-02T18:52:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-geometric-construction-and-net-visualization/sssssqsc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-geometric-construction-and-net-visualization/sssssqsc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-geometric-construction-and-net-visualization/sssssqsc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-geometric-construction-and-net-visualization/sssssqsc"/>
      <lastmod>2026-11-02T12:36:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-geometric-construction-and-net-visualization/sssssqsc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-geometric-construction-and-net-visualization/sssssqsc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-geometric-construction-and-net-visualization/sssssqsc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-geometric-construction-and-net-visualization/sssssqsc"/>
      <lastmod>2026-11-02T12:36:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/opposite-points/sssssqsr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/opposite-points/sssssqsr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/opposite-points/sssssqsr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/opposite-points/sssssqsr"/>
      <lastmod>2026-11-02T10:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/opposite-points/sssssqsr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/opposite-points/sssssqsr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/opposite-points/sssssqsr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/opposite-points/sssssqsr"/>
      <lastmod>2026-11-02T10:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-general-equations-of-circles/sssssqsh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-general-equations-of-circles/sssssqsh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-general-equations-of-circles/sssssqsh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-general-equations-of-circles/sssssqsh"/>
      <lastmod>2026-11-01T23:36:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-general-equations-of-circles/sssssqsh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-general-equations-of-circles/sssssqsh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-general-equations-of-circles/sssssqsh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-general-equations-of-circles/sssssqsh"/>
      <lastmod>2026-11-01T23:36:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spheres-intersecting-with-sphere/sssssqst</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheres-intersecting-with-sphere/sssssqst"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheres-intersecting-with-sphere/sssssqst"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheres-intersecting-with-sphere/sssssqst"/>
      <lastmod>2026-11-02T12:05:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spheres-intersecting-with-sphere/sssssqst</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheres-intersecting-with-sphere/sssssqst"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheres-intersecting-with-sphere/sssssqst"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheres-intersecting-with-sphere/sssssqst"/>
      <lastmod>2026-11-02T12:05:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/products-of-linear-functions-demo/sssssqsx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/products-of-linear-functions-demo/sssssqsx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/products-of-linear-functions-demo/sssssqsx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/products-of-linear-functions-demo/sssssqsx"/>
      <lastmod>2026-11-02T18:04:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/products-of-linear-functions-demo/sssssqsx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/products-of-linear-functions-demo/sssssqsx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/products-of-linear-functions-demo/sssssqsx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/products-of-linear-functions-demo/sssssqsx"/>
      <lastmod>2026-11-02T18:04:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivatives-of-sine-and-cosine-functions/sssssqsi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-of-sine-and-cosine-functions/sssssqsi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-of-sine-and-cosine-functions/sssssqsi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-of-sine-and-cosine-functions/sssssqsi"/>
      <lastmod>2026-11-02T18:01:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivatives-of-sine-and-cosine-functions/sssssqsi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-of-sine-and-cosine-functions/sssssqsi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-of-sine-and-cosine-functions/sssssqsi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-of-sine-and-cosine-functions/sssssqsi"/>
      <lastmod>2026-11-02T18:01:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-unit-circle-tangent-curve/sssssqso</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-unit-circle-tangent-curve/sssssqso"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-unit-circle-tangent-curve/sssssqso"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-unit-circle-tangent-curve/sssssqso"/>
      <lastmod>2026-11-02T11:57:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-unit-circle-tangent-curve/sssssqso</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-unit-circle-tangent-curve/sssssqso"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-unit-circle-tangent-curve/sssssqso"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-unit-circle-tangent-curve/sssssqso"/>
      <lastmod>2026-11-02T11:57:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tnb-frame-with-osculating-and-normal-planes/sssssq7s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tnb-frame-with-osculating-and-normal-planes/sssssq7s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tnb-frame-with-osculating-and-normal-planes/sssssq7s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tnb-frame-with-osculating-and-normal-planes/sssssq7s"/>
      <lastmod>2026-11-02T00:29:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tnb-frame-with-osculating-and-normal-planes/sssssq7s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tnb-frame-with-osculating-and-normal-planes/sssssq7s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tnb-frame-with-osculating-and-normal-planes/sssssq7s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tnb-frame-with-osculating-and-normal-planes/sssssq7s"/>
      <lastmod>2026-11-02T00:29:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-prism-cross-sections/sssssq77</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-cross-sections/sssssq77"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-cross-sections/sssssq77"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-cross-sections/sssssq77"/>
      <lastmod>2026-11-02T17:15:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-prism-cross-sections/sssssq77</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-cross-sections/sssssq77"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-cross-sections/sssssq77"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-cross-sections/sssssq77"/>
      <lastmod>2026-11-02T17:15:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-shapes-using-coordinates/sssssq7n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-shapes-using-coordinates/sssssq7n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-shapes-using-coordinates/sssssq7n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-shapes-using-coordinates/sssssq7n"/>
      <lastmod>2026-11-01T21:38:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-shapes-using-coordinates/sssssq7n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-shapes-using-coordinates/sssssq7n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-shapes-using-coordinates/sssssq7n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-shapes-using-coordinates/sssssq7n"/>
      <lastmod>2026-11-01T21:38:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-demonstration-by-ku-yin-bon-albert/sssssq72</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-demonstration-by-ku-yin-bon-albert/sssssq72"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-demonstration-by-ku-yin-bon-albert/sssssq72"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-demonstration-by-ku-yin-bon-albert/sssssq72"/>
      <lastmod>2026-11-02T15:46:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-demonstration-by-ku-yin-bon-albert/sssssq72</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-demonstration-by-ku-yin-bon-albert/sssssq72"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-demonstration-by-ku-yin-bon-albert/sssssq72"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-demonstration-by-ku-yin-bon-albert/sssssq72"/>
      <lastmod>2026-11-02T15:46:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-a-prism-with-unity-cubes/sssssq7k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-prism-with-unity-cubes/sssssq7k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-prism-with-unity-cubes/sssssq7k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-prism-with-unity-cubes/sssssq7k"/>
      <lastmod>2026-11-01T19:12:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-a-prism-with-unity-cubes/sssssq7k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-prism-with-unity-cubes/sssssq7k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-prism-with-unity-cubes/sssssq7k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-prism-with-unity-cubes/sssssq7k"/>
      <lastmod>2026-11-01T19:12:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/energy-diagram-1a/sssssq7z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-diagram-1a/sssssq7z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-diagram-1a/sssssq7z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-diagram-1a/sssssq7z"/>
      <lastmod>2026-11-02T11:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/energy-diagram-1a/sssssq7z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-diagram-1a/sssssq7z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-diagram-1a/sssssq7z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-diagram-1a/sssssq7z"/>
      <lastmod>2026-11-02T11:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinate-grid-geometry-exploration-intersections-and-vectors/sssssq70</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-grid-geometry-exploration-intersections-and-vectors/sssssq70"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-grid-geometry-exploration-intersections-and-vectors/sssssq70"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-grid-geometry-exploration-intersections-and-vectors/sssssq70"/>
      <lastmod>2026-11-02T00:08:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinate-grid-geometry-exploration-intersections-and-vectors/sssssq70</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-grid-geometry-exploration-intersections-and-vectors/sssssq70"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-grid-geometry-exploration-intersections-and-vectors/sssssq70"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-grid-geometry-exploration-intersections-and-vectors/sssssq70"/>
      <lastmod>2026-11-02T00:08:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-functions-charge-discharge-model/sssssq7d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-charge-discharge-model/sssssq7d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-charge-discharge-model/sssssq7d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-charge-discharge-model/sssssq7d"/>
      <lastmod>2026-11-02T12:00:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-functions-charge-discharge-model/sssssq7d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-charge-discharge-model/sssssq7d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-charge-discharge-model/sssssq7d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-charge-discharge-model/sssssq7d"/>
      <lastmod>2026-11-02T12:00:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-area-of-parallelogram-by-ooi-soo-huat/sssssq7f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-area-of-parallelogram-by-ooi-soo-huat/sssssq7f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-area-of-parallelogram-by-ooi-soo-huat/sssssq7f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-area-of-parallelogram-by-ooi-soo-huat/sssssq7f"/>
      <lastmod>2026-11-02T17:55:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-area-of-parallelogram-by-ooi-soo-huat/sssssq7f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-area-of-parallelogram-by-ooi-soo-huat/sssssq7f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-area-of-parallelogram-by-ooi-soo-huat/sssssq7f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-area-of-parallelogram-by-ooi-soo-huat/sssssq7f"/>
      <lastmod>2026-11-02T17:55:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-equations-with-theta/sssssq78</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-equations-with-theta/sssssq78"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-equations-with-theta/sssssq78"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-equations-with-theta/sssssq78"/>
      <lastmod>2026-11-02T17:59:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-equations-with-theta/sssssq78</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-equations-with-theta/sssssq78"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-equations-with-theta/sssssq78"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-equations-with-theta/sssssq78"/>
      <lastmod>2026-11-02T17:59:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reasoning-about-contexts-with-tape-diagrams/sssssq7u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-about-contexts-with-tape-diagrams/sssssq7u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-about-contexts-with-tape-diagrams/sssssq7u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-about-contexts-with-tape-diagrams/sssssq7u"/>
      <lastmod>2026-11-02T10:36:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reasoning-about-contexts-with-tape-diagrams/sssssq7u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-about-contexts-with-tape-diagrams/sssssq7u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-about-contexts-with-tape-diagrams/sssssq7u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-about-contexts-with-tape-diagrams/sssssq7u"/>
      <lastmod>2026-11-02T10:36:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/field-of-fractions-demo/sssssq75</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/field-of-fractions-demo/sssssq75"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/field-of-fractions-demo/sssssq75"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/field-of-fractions-demo/sssssq75"/>
      <lastmod>2026-11-02T02:51:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/field-of-fractions-demo/sssssq75</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/field-of-fractions-demo/sssssq75"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/field-of-fractions-demo/sssssq75"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/field-of-fractions-demo/sssssq75"/>
      <lastmod>2026-11-02T02:51:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/turtle-plays-battleship/sssssq7b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/turtle-plays-battleship/sssssq7b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/turtle-plays-battleship/sssssq7b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/turtle-plays-battleship/sssssq7b"/>
      <lastmod>2026-11-02T02:24:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/turtle-plays-battleship/sssssq7b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/turtle-plays-battleship/sssssq7b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/turtle-plays-battleship/sssssq7b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/turtle-plays-battleship/sssssq7b"/>
      <lastmod>2026-11-02T02:24:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3x3-linear-systems-linear-combinations/sssssq73</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3x3-linear-systems-linear-combinations/sssssq73"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3x3-linear-systems-linear-combinations/sssssq73"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3x3-linear-systems-linear-combinations/sssssq73"/>
      <lastmod>2026-11-02T03:11:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3x3-linear-systems-linear-combinations/sssssq73</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3x3-linear-systems-linear-combinations/sssssq73"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3x3-linear-systems-linear-combinations/sssssq73"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3x3-linear-systems-linear-combinations/sssssq73"/>
      <lastmod>2026-11-02T03:11:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sunrise/sssssq7q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sunrise/sssssq7q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sunrise/sssssq7q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sunrise/sssssq7q"/>
      <lastmod>2026-11-01T22:10:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sunrise/sssssq7q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sunrise/sssssq7q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sunrise/sssssq7q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sunrise/sssssq7q"/>
      <lastmod>2026-11-01T22:10:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mixed-numbers/sssssq71</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixed-numbers/sssssq71"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixed-numbers/sssssq71"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixed-numbers/sssssq71"/>
      <lastmod>2026-11-02T16:55:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mixed-numbers/sssssq71</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixed-numbers/sssssq71"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixed-numbers/sssssq71"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixed-numbers/sssssq71"/>
      <lastmod>2026-11-02T16:55:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coplanar-vectors/sssssq7m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coplanar-vectors/sssssq7m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coplanar-vectors/sssssq7m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coplanar-vectors/sssssq7m"/>
      <lastmod>2026-11-02T02:33:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coplanar-vectors/sssssq7m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coplanar-vectors/sssssq7m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coplanar-vectors/sssssq7m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coplanar-vectors/sssssq7m"/>
      <lastmod>2026-11-02T02:33:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-interior-angles-theorem/sssssq7j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-interior-angles-theorem/sssssq7j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-interior-angles-theorem/sssssq7j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-interior-angles-theorem/sssssq7j"/>
      <lastmod>2026-11-01T22:02:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-interior-angles-theorem/sssssq7j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-interior-angles-theorem/sssssq7j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-interior-angles-theorem/sssssq7j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-interior-angles-theorem/sssssq7j"/>
      <lastmod>2026-11-01T22:02:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-and-parallel-lines/sssssq7p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-and-parallel-lines/sssssq7p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-and-parallel-lines/sssssq7p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-and-parallel-lines/sssssq7p"/>
      <lastmod>2026-11-02T16:41:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-and-parallel-lines/sssssq7p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-and-parallel-lines/sssssq7p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-and-parallel-lines/sssssq7p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-and-parallel-lines/sssssq7p"/>
      <lastmod>2026-11-02T16:41:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/carbon-fiber-volume-intuitive-introduction/sssssq7w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/carbon-fiber-volume-intuitive-introduction/sssssq7w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/carbon-fiber-volume-intuitive-introduction/sssssq7w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/carbon-fiber-volume-intuitive-introduction/sssssq7w"/>
      <lastmod>2026-11-02T06:41:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/carbon-fiber-volume-intuitive-introduction/sssssq7w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/carbon-fiber-volume-intuitive-introduction/sssssq7w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/carbon-fiber-volume-intuitive-introduction/sssssq7w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/carbon-fiber-volume-intuitive-introduction/sssssq7w"/>
      <lastmod>2026-11-02T06:41:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nature-of-critical-points-of-function-f-x-y-local-max-min-and-saddle-1/sssssq76</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nature-of-critical-points-of-function-f-x-y-local-max-min-and-saddle-1/sssssq76"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nature-of-critical-points-of-function-f-x-y-local-max-min-and-saddle-1/sssssq76"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nature-of-critical-points-of-function-f-x-y-local-max-min-and-saddle-1/sssssq76"/>
      <lastmod>2026-11-01T23:26:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nature-of-critical-points-of-function-f-x-y-local-max-min-and-saddle-1/sssssq76</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nature-of-critical-points-of-function-f-x-y-local-max-min-and-saddle-1/sssssq76"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nature-of-critical-points-of-function-f-x-y-local-max-min-and-saddle-1/sssssq76"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nature-of-critical-points-of-function-f-x-y-local-max-min-and-saddle-1/sssssq76"/>
      <lastmod>2026-11-01T23:26:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-wave-v1-1/sssssq7g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-wave-v1-1/sssssq7g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-wave-v1-1/sssssq7g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-wave-v1-1/sssssq7g"/>
      <lastmod>2026-11-02T16:30:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-wave-v1-1/sssssq7g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-wave-v1-1/sssssq7g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-wave-v1-1/sssssq7g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-wave-v1-1/sssssq7g"/>
      <lastmod>2026-11-02T16:30:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-geometric-construction-and-properties-by-lera/sssssq79</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-geometric-construction-and-properties-by-lera/sssssq79"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-geometric-construction-and-properties-by-lera/sssssq79"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-geometric-construction-and-properties-by-lera/sssssq79"/>
      <lastmod>2026-11-02T18:48:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-geometric-construction-and-properties-by-lera/sssssq79</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-geometric-construction-and-properties-by-lera/sssssq79"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-geometric-construction-and-properties-by-lera/sssssq79"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-geometric-construction-and-properties-by-lera/sssssq79"/>
      <lastmod>2026-11-02T18:48:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-and-geometric-distribution/sssssq7e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-and-geometric-distribution/sssssq7e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-and-geometric-distribution/sssssq7e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-and-geometric-distribution/sssssq7e"/>
      <lastmod>2026-11-02T12:12:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-and-geometric-distribution/sssssq7e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-and-geometric-distribution/sssssq7e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-and-geometric-distribution/sssssq7e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-and-geometric-distribution/sssssq7e"/>
      <lastmod>2026-11-02T12:12:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-interactive/sssssq7v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-interactive/sssssq7v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-interactive/sssssq7v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-interactive/sssssq7v"/>
      <lastmod>2026-11-02T06:11:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-interactive/sssssq7v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-interactive/sssssq7v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-interactive/sssssq7v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-interactive/sssssq7v"/>
      <lastmod>2026-11-02T06:11:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-example-constructions-and-transformations/sssssq74</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-example-constructions-and-transformations/sssssq74"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-example-constructions-and-transformations/sssssq74"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-example-constructions-and-transformations/sssssq74"/>
      <lastmod>2026-11-02T18:36:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-example-constructions-and-transformations/sssssq74</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-example-constructions-and-transformations/sssssq74"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-example-constructions-and-transformations/sssssq74"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-example-constructions-and-transformations/sssssq74"/>
      <lastmod>2026-11-02T18:36:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mean-function-and-mean-hyperbola/sssssq7l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-function-and-mean-hyperbola/sssssq7l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-function-and-mean-hyperbola/sssssq7l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-function-and-mean-hyperbola/sssssq7l"/>
      <lastmod>2026-11-02T00:54:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mean-function-and-mean-hyperbola/sssssq7l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-function-and-mean-hyperbola/sssssq7l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-function-and-mean-hyperbola/sssssq7l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-function-and-mean-hyperbola/sssssq7l"/>
      <lastmod>2026-11-02T00:54:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/egg-shaped-surface-continuous-construction-with-exponential-and-trigonometric-f/sssssq7y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/egg-shaped-surface-continuous-construction-with-exponential-and-trigonometric-f/sssssq7y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/egg-shaped-surface-continuous-construction-with-exponential-and-trigonometric-f/sssssq7y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/egg-shaped-surface-continuous-construction-with-exponential-and-trigonometric-f/sssssq7y"/>
      <lastmod>2026-11-01T19:00:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/egg-shaped-surface-continuous-construction-with-exponential-and-trigonometric-f/sssssq7y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/egg-shaped-surface-continuous-construction-with-exponential-and-trigonometric-f/sssssq7y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/egg-shaped-surface-continuous-construction-with-exponential-and-trigonometric-f/sssssq7y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/egg-shaped-surface-continuous-construction-with-exponential-and-trigonometric-f/sssssq7y"/>
      <lastmod>2026-11-01T19:00:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/4-ways-to-quickly-and-easily-construct-an-equilateral-triangle-with-vertices-on/sssssq7a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/4-ways-to-quickly-and-easily-construct-an-equilateral-triangle-with-vertices-on/sssssq7a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/4-ways-to-quickly-and-easily-construct-an-equilateral-triangle-with-vertices-on/sssssq7a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/4-ways-to-quickly-and-easily-construct-an-equilateral-triangle-with-vertices-on/sssssq7a"/>
      <lastmod>2026-11-01T21:26:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/4-ways-to-quickly-and-easily-construct-an-equilateral-triangle-with-vertices-on/sssssq7a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/4-ways-to-quickly-and-easily-construct-an-equilateral-triangle-with-vertices-on/sssssq7a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/4-ways-to-quickly-and-easily-construct-an-equilateral-triangle-with-vertices-on/sssssq7a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/4-ways-to-quickly-and-easily-construct-an-equilateral-triangle-with-vertices-on/sssssq7a"/>
      <lastmod>2026-11-01T21:26:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-data-representation/sssssq7c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-data-representation/sssssq7c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-data-representation/sssssq7c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-data-representation/sssssq7c"/>
      <lastmod>2026-11-01T22:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-data-representation/sssssq7c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-data-representation/sssssq7c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-data-representation/sssssq7c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-data-representation/sssssq7c"/>
      <lastmod>2026-11-01T22:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-numbers-in-irregular-polygons/sssssq7r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-numbers-in-irregular-polygons/sssssq7r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-numbers-in-irregular-polygons/sssssq7r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-numbers-in-irregular-polygons/sssssq7r"/>
      <lastmod>2026-11-01T22:11:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-numbers-in-irregular-polygons/sssssq7r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-numbers-in-irregular-polygons/sssssq7r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-numbers-in-irregular-polygons/sssssq7r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-numbers-in-irregular-polygons/sssssq7r"/>
      <lastmod>2026-11-01T22:11:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-and-geometry-vectors/sssssq7h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-vectors/sssssq7h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-geometry-vectors/sssssq7h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-vectors/sssssq7h"/>
      <lastmod>2026-11-02T16:58:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-and-geometry-vectors/sssssq7h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-vectors/sssssq7h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-geometry-vectors/sssssq7h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-vectors/sssssq7h"/>
      <lastmod>2026-11-02T16:58:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-of-exp-x/sssssq7t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-exp-x/sssssq7t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-exp-x/sssssq7t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-exp-x/sssssq7t"/>
      <lastmod>2026-11-02T03:04:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-of-exp-x/sssssq7t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-exp-x/sssssq7t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-exp-x/sssssq7t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-exp-x/sssssq7t"/>
      <lastmod>2026-11-02T03:04:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/composite-prism-km/sssssq7x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-prism-km/sssssq7x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-prism-km/sssssq7x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-prism-km/sssssq7x"/>
      <lastmod>2026-11-02T18:13:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/composite-prism-km/sssssq7x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-prism-km/sssssq7x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-prism-km/sssssq7x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-prism-km/sssssq7x"/>
      <lastmod>2026-11-02T18:13:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-geometric-construction-right-triangles-and-polygon-sequence/sssssq7i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-geometric-construction-right-triangles-and-polygon-sequence/sssssq7i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-geometric-construction-right-triangles-and-polygon-sequence/sssssq7i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-geometric-construction-right-triangles-and-polygon-sequence/sssssq7i"/>
      <lastmod>2026-11-01T21:58:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-geometric-construction-right-triangles-and-polygon-sequence/sssssq7i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-geometric-construction-right-triangles-and-polygon-sequence/sssssq7i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-geometric-construction-right-triangles-and-polygon-sequence/sssssq7i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-geometric-construction-right-triangles-and-polygon-sequence/sssssq7i"/>
      <lastmod>2026-11-01T21:58:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/closest-point-problem-4/sssssq7o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/closest-point-problem-4/sssssq7o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/closest-point-problem-4/sssssq7o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/closest-point-problem-4/sssssq7o"/>
      <lastmod>2026-11-01T21:10:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/closest-point-problem-4/sssssq7o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/closest-point-problem-4/sssssq7o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/closest-point-problem-4/sssssq7o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/closest-point-problem-4/sssssq7o"/>
      <lastmod>2026-11-01T21:10:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/observing-coordinate-changes-under-rotations/sssssqns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/observing-coordinate-changes-under-rotations/sssssqns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/observing-coordinate-changes-under-rotations/sssssqns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/observing-coordinate-changes-under-rotations/sssssqns"/>
      <lastmod>2026-11-01T21:31:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/observing-coordinate-changes-under-rotations/sssssqns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/observing-coordinate-changes-under-rotations/sssssqns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/observing-coordinate-changes-under-rotations/sssssqns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/observing-coordinate-changes-under-rotations/sssssqns"/>
      <lastmod>2026-11-01T21:31:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-wave-zig-zag-illusion/sssssqn7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-zig-zag-illusion/sssssqn7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-zig-zag-illusion/sssssqn7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-zig-zag-illusion/sssssqn7"/>
      <lastmod>2026-11-02T17:56:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-wave-zig-zag-illusion/sssssqn7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-zig-zag-illusion/sssssqn7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-zig-zag-illusion/sssssqn7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-zig-zag-illusion/sssssqn7"/>
      <lastmod>2026-11-02T17:56:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slicing-solids/sssssqnn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-solids/sssssqnn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-solids/sssssqnn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-solids/sssssqnn"/>
      <lastmod>2026-11-01T22:51:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slicing-solids/sssssqnn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-solids/sssssqnn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-solids/sssssqnn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-solids/sssssqnn"/>
      <lastmod>2026-11-01T22:51:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-and-function-graphing/sssssqn2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-function-graphing/sssssqn2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-function-graphing/sssssqn2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-function-graphing/sssssqn2"/>
      <lastmod>2026-11-02T18:19:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-and-function-graphing/sssssqn2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-function-graphing/sssssqn2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-function-graphing/sssssqn2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-function-graphing/sssssqn2"/>
      <lastmod>2026-11-02T18:19:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-subtraction-illustrated-dynamically/sssssqnk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-illustrated-dynamically/sssssqnk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-illustrated-dynamically/sssssqnk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-illustrated-dynamically/sssssqnk"/>
      <lastmod>2026-11-02T17:51:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-subtraction-illustrated-dynamically/sssssqnk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-illustrated-dynamically/sssssqnk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-illustrated-dynamically/sssssqnk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-illustrated-dynamically/sssssqnk"/>
      <lastmod>2026-11-02T17:51:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-quiz/sssssqnz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-quiz/sssssqnz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-quiz/sssssqnz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-quiz/sssssqnz"/>
      <lastmod>2026-11-02T09:05:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-quiz/sssssqnz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-quiz/sssssqnz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-quiz/sssssqnz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-quiz/sssssqnz"/>
      <lastmod>2026-11-02T09:05:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-e-x-function/sssssqn0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-e-x-function/sssssqn0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-e-x-function/sssssqn0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-e-x-function/sssssqn0"/>
      <lastmod>2026-11-02T17:58:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-e-x-function/sssssqn0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-e-x-function/sssssqn0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-e-x-function/sssssqn0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-e-x-function/sssssqn0"/>
      <lastmod>2026-11-02T17:58:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-segments-and-ratios/sssssqnd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segments-and-ratios/sssssqnd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segments-and-ratios/sssssqnd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segments-and-ratios/sssssqnd"/>
      <lastmod>2026-11-02T10:49:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-segments-and-ratios/sssssqnd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segments-and-ratios/sssssqnd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segments-and-ratios/sssssqnd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segments-and-ratios/sssssqnd"/>
      <lastmod>2026-11-02T10:49:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a1-ace-4-solve-literal-equations-and-formulas/sssssqnf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a1-ace-4-solve-literal-equations-and-formulas/sssssqnf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a1-ace-4-solve-literal-equations-and-formulas/sssssqnf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a1-ace-4-solve-literal-equations-and-formulas/sssssqnf"/>
      <lastmod>2026-11-01T21:43:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a1-ace-4-solve-literal-equations-and-formulas/sssssqnf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a1-ace-4-solve-literal-equations-and-formulas/sssssqnf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a1-ace-4-solve-literal-equations-and-formulas/sssssqnf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a1-ace-4-solve-literal-equations-and-formulas/sssssqnf"/>
      <lastmod>2026-11-01T21:43:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-trigonometry-and-circle-geometry-demo/sssssqn8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-trigonometry-and-circle-geometry-demo/sssssqn8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-trigonometry-and-circle-geometry-demo/sssssqn8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-trigonometry-and-circle-geometry-demo/sssssqn8"/>
      <lastmod>2026-11-02T17:18:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-trigonometry-and-circle-geometry-demo/sssssqn8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-trigonometry-and-circle-geometry-demo/sssssqn8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-trigonometry-and-circle-geometry-demo/sssssqn8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-trigonometry-and-circle-geometry-demo/sssssqn8"/>
      <lastmod>2026-11-02T17:18:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similarity-transformation-and-surface-area/sssssqnu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-surface-area/sssssqnu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-and-surface-area/sssssqnu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-surface-area/sssssqnu"/>
      <lastmod>2026-11-02T15:20:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similarity-transformation-and-surface-area/sssssqnu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-surface-area/sssssqnu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-and-surface-area/sssssqnu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-surface-area/sssssqnu"/>
      <lastmod>2026-11-02T15:20:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-pyramid-cross-sections/sssssqn5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-pyramid-cross-sections/sssssqn5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-pyramid-cross-sections/sssssqn5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-pyramid-cross-sections/sssssqn5"/>
      <lastmod>2026-11-01T23:30:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-pyramid-cross-sections/sssssqn5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-pyramid-cross-sections/sssssqn5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-pyramid-cross-sections/sssssqn5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-pyramid-cross-sections/sssssqn5"/>
      <lastmod>2026-11-01T23:30:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/octants-planes/sssssqnb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octants-planes/sssssqnb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octants-planes/sssssqnb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octants-planes/sssssqnb"/>
      <lastmod>2026-11-02T03:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/octants-planes/sssssqnb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octants-planes/sssssqnb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octants-planes/sssssqnb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octants-planes/sssssqnb"/>
      <lastmod>2026-11-02T03:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quick-calculation-of-rectangle-area/sssssqn3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quick-calculation-of-rectangle-area/sssssqn3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quick-calculation-of-rectangle-area/sssssqn3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quick-calculation-of-rectangle-area/sssssqn3"/>
      <lastmod>2026-11-01T19:01:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quick-calculation-of-rectangle-area/sssssqn3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quick-calculation-of-rectangle-area/sssssqn3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quick-calculation-of-rectangle-area/sssssqn3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quick-calculation-of-rectangle-area/sssssqn3"/>
      <lastmod>2026-11-01T19:01:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roots-of-unity-by-d-vasu-raj/sssssqnq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-unity-by-d-vasu-raj/sssssqnq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-unity-by-d-vasu-raj/sssssqnq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-unity-by-d-vasu-raj/sssssqnq"/>
      <lastmod>2026-11-02T00:13:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roots-of-unity-by-d-vasu-raj/sssssqnq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-unity-by-d-vasu-raj/sssssqnq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-unity-by-d-vasu-raj/sssssqnq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-unity-by-d-vasu-raj/sssssqnq"/>
      <lastmod>2026-11-02T00:13:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-model-of-multiplication-by-sanjay-gulati/sssssqn1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-model-of-multiplication-by-sanjay-gulati/sssssqn1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-model-of-multiplication-by-sanjay-gulati/sssssqn1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-model-of-multiplication-by-sanjay-gulati/sssssqn1"/>
      <lastmod>2026-11-02T02:21:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-model-of-multiplication-by-sanjay-gulati/sssssqn1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-model-of-multiplication-by-sanjay-gulati/sssssqn1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-model-of-multiplication-by-sanjay-gulati/sssssqn1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-model-of-multiplication-by-sanjay-gulati/sssssqn1"/>
      <lastmod>2026-11-02T02:21:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-generating-3d-solids-by-rotating-a-curve/sssssqnm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-generating-3d-solids-by-rotating-a-curve/sssssqnm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-generating-3d-solids-by-rotating-a-curve/sssssqnm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-generating-3d-solids-by-rotating-a-curve/sssssqnm"/>
      <lastmod>2026-11-01T21:54:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-generating-3d-solids-by-rotating-a-curve/sssssqnm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-generating-3d-solids-by-rotating-a-curve/sssssqnm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-generating-3d-solids-by-rotating-a-curve/sssssqnm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-generating-3d-solids-by-rotating-a-curve/sssssqnm"/>
      <lastmod>2026-11-01T21:54:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roots-and-stationary-points-of-curves/sssssqnj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-and-stationary-points-of-curves/sssssqnj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-and-stationary-points-of-curves/sssssqnj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-and-stationary-points-of-curves/sssssqnj"/>
      <lastmod>2026-11-02T18:18:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roots-and-stationary-points-of-curves/sssssqnj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-and-stationary-points-of-curves/sssssqnj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-and-stationary-points-of-curves/sssssqnj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-and-stationary-points-of-curves/sssssqnj"/>
      <lastmod>2026-11-02T18:18:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-right-triangles-to-find-river-width-word-problem/sssssqnp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-to-find-river-width-word-problem/sssssqnp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-to-find-river-width-word-problem/sssssqnp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-to-find-river-width-word-problem/sssssqnp"/>
      <lastmod>2026-11-01T19:13:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-right-triangles-to-find-river-width-word-problem/sssssqnp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-to-find-river-width-word-problem/sssssqnp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-to-find-river-width-word-problem/sssssqnp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-to-find-river-width-word-problem/sssssqnp"/>
      <lastmod>2026-11-01T19:13:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-dimensions/sssssqnw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-dimensions/sssssqnw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-dimensions/sssssqnw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-dimensions/sssssqnw"/>
      <lastmod>2026-11-02T08:51:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-dimensions/sssssqnw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-dimensions/sssssqnw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-dimensions/sssssqnw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-dimensions/sssssqnw"/>
      <lastmod>2026-11-02T08:51:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/y-scaled-ellipse/sssssqn6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/y-scaled-ellipse/sssssqn6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/y-scaled-ellipse/sssssqn6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/y-scaled-ellipse/sssssqn6"/>
      <lastmod>2026-11-02T02:28:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/y-scaled-ellipse/sssssqn6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/y-scaled-ellipse/sssssqn6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/y-scaled-ellipse/sssssqn6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/y-scaled-ellipse/sssssqn6"/>
      <lastmod>2026-11-02T02:28:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-mean/sssssqng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean/sssssqng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean/sssssqng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean/sssssqng"/>
      <lastmod>2026-11-02T17:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-mean/sssssqng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean/sssssqng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean/sssssqng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean/sssssqng"/>
      <lastmod>2026-11-02T17:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-demonstration/sssssqn9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-demonstration/sssssqn9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-demonstration/sssssqn9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-demonstration/sssssqn9"/>
      <lastmod>2026-11-02T18:25:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-demonstration/sssssqn9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-demonstration/sssssqn9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-demonstration/sssssqn9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-demonstration/sssssqn9"/>
      <lastmod>2026-11-02T18:25:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fastest-growing-function-comparing-linear-quadratic-and-exponential-growth/sssssqne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fastest-growing-function-comparing-linear-quadratic-and-exponential-growth/sssssqne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fastest-growing-function-comparing-linear-quadratic-and-exponential-growth/sssssqne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fastest-growing-function-comparing-linear-quadratic-and-exponential-growth/sssssqne"/>
      <lastmod>2026-11-02T13:54:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fastest-growing-function-comparing-linear-quadratic-and-exponential-growth/sssssqne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fastest-growing-function-comparing-linear-quadratic-and-exponential-growth/sssssqne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fastest-growing-function-comparing-linear-quadratic-and-exponential-growth/sssssqne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fastest-growing-function-comparing-linear-quadratic-and-exponential-growth/sssssqne"/>
      <lastmod>2026-11-02T13:54:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/blank-canvas-a-starting-point-for-creating-geometry-visuals-with-technology/sssssqnv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/blank-canvas-a-starting-point-for-creating-geometry-visuals-with-technology/sssssqnv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/blank-canvas-a-starting-point-for-creating-geometry-visuals-with-technology/sssssqnv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/blank-canvas-a-starting-point-for-creating-geometry-visuals-with-technology/sssssqnv"/>
      <lastmod>2026-11-01T19:32:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/blank-canvas-a-starting-point-for-creating-geometry-visuals-with-technology/sssssqnv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/blank-canvas-a-starting-point-for-creating-geometry-visuals-with-technology/sssssqnv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/blank-canvas-a-starting-point-for-creating-geometry-visuals-with-technology/sssssqnv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/blank-canvas-a-starting-point-for-creating-geometry-visuals-with-technology/sssssqnv"/>
      <lastmod>2026-11-01T19:32:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximize-inscribed-rectangle-area-in-a-semicircle/sssssqn4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximize-inscribed-rectangle-area-in-a-semicircle/sssssqn4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximize-inscribed-rectangle-area-in-a-semicircle/sssssqn4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximize-inscribed-rectangle-area-in-a-semicircle/sssssqn4"/>
      <lastmod>2026-11-01T19:07:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximize-inscribed-rectangle-area-in-a-semicircle/sssssqn4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximize-inscribed-rectangle-area-in-a-semicircle/sssssqn4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximize-inscribed-rectangle-area-in-a-semicircle/sssssqn4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximize-inscribed-rectangle-area-in-a-semicircle/sssssqn4"/>
      <lastmod>2026-11-01T19:07:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-function-example/sssssqnl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-function-example/sssssqnl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-function-example/sssssqnl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-function-example/sssssqnl"/>
      <lastmod>2026-11-01T23:21:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-function-example/sssssqnl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-function-example/sssssqnl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-function-example/sssssqnl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-function-example/sssssqnl"/>
      <lastmod>2026-11-01T23:21:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-triangle-quadrilateral-area/sssssqny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-triangle-quadrilateral-area/sssssqny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-triangle-quadrilateral-area/sssssqny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-triangle-quadrilateral-area/sssssqny"/>
      <lastmod>2026-11-02T18:20:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-triangle-quadrilateral-area/sssssqny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-triangle-quadrilateral-area/sssssqny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-triangle-quadrilateral-area/sssssqny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-triangle-quadrilateral-area/sssssqny"/>
      <lastmod>2026-11-02T18:20:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-triangular-prism/sssssqna</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-triangular-prism/sssssqna"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-triangular-prism/sssssqna"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-triangular-prism/sssssqna"/>
      <lastmod>2026-11-02T12:21:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-triangular-prism/sssssqna</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-triangular-prism/sssssqna"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-triangular-prism/sssssqna"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-triangular-prism/sssssqna"/>
      <lastmod>2026-11-02T12:21:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoids-and-kites-geometric-construction-and-properties-by-genia-kennedy/sssssqnc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoids-and-kites-geometric-construction-and-properties-by-genia-kennedy/sssssqnc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoids-and-kites-geometric-construction-and-properties-by-genia-kennedy/sssssqnc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoids-and-kites-geometric-construction-and-properties-by-genia-kennedy/sssssqnc"/>
      <lastmod>2026-11-02T18:50:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoids-and-kites-geometric-construction-and-properties-by-genia-kennedy/sssssqnc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoids-and-kites-geometric-construction-and-properties-by-genia-kennedy/sssssqnc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoids-and-kites-geometric-construction-and-properties-by-genia-kennedy/sssssqnc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoids-and-kites-geometric-construction-and-properties-by-genia-kennedy/sssssqnc"/>
      <lastmod>2026-11-02T18:50:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/evaluating-functions-and-graphing-ordered-pairs/sssssqnr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluating-functions-and-graphing-ordered-pairs/sssssqnr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluating-functions-and-graphing-ordered-pairs/sssssqnr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluating-functions-and-graphing-ordered-pairs/sssssqnr"/>
      <lastmod>2026-11-02T18:20:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/evaluating-functions-and-graphing-ordered-pairs/sssssqnr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluating-functions-and-graphing-ordered-pairs/sssssqnr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluating-functions-and-graphing-ordered-pairs/sssssqnr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluating-functions-and-graphing-ordered-pairs/sssssqnr"/>
      <lastmod>2026-11-02T18:20:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-adding-vectors-geometrically/sssssqnh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-adding-vectors-geometrically/sssssqnh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-adding-vectors-geometrically/sssssqnh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-adding-vectors-geometrically/sssssqnh"/>
      <lastmod>2026-11-01T21:29:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-adding-vectors-geometrically/sssssqnh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-adding-vectors-geometrically/sssssqnh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-adding-vectors-geometrically/sssssqnh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-adding-vectors-geometrically/sssssqnh"/>
      <lastmod>2026-11-01T21:29:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/central-limit-theorem-demonstration-by-bed-prasad-dhakal/sssssqnt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-limit-theorem-demonstration-by-bed-prasad-dhakal/sssssqnt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-limit-theorem-demonstration-by-bed-prasad-dhakal/sssssqnt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-limit-theorem-demonstration-by-bed-prasad-dhakal/sssssqnt"/>
      <lastmod>2026-11-02T18:45:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/central-limit-theorem-demonstration-by-bed-prasad-dhakal/sssssqnt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-limit-theorem-demonstration-by-bed-prasad-dhakal/sssssqnt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-limit-theorem-demonstration-by-bed-prasad-dhakal/sssssqnt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-limit-theorem-demonstration-by-bed-prasad-dhakal/sssssqnt"/>
      <lastmod>2026-11-02T18:45:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubic-polynomial-factorization/sssssqnx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-polynomial-factorization/sssssqnx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-polynomial-factorization/sssssqnx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-polynomial-factorization/sssssqnx"/>
      <lastmod>2026-11-02T16:30:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubic-polynomial-factorization/sssssqnx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-polynomial-factorization/sssssqnx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-polynomial-factorization/sssssqnx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-polynomial-factorization/sssssqnx"/>
      <lastmod>2026-11-02T16:30:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-deviation-calculation-visualizing-data-spread/sssssqni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-calculation-visualizing-data-spread/sssssqni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-calculation-visualizing-data-spread/sssssqni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-calculation-visualizing-data-spread/sssssqni"/>
      <lastmod>2026-11-01T21:26:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-deviation-calculation-visualizing-data-spread/sssssqni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-calculation-visualizing-data-spread/sssssqni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-calculation-visualizing-data-spread/sssssqni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-calculation-visualizing-data-spread/sssssqni"/>
      <lastmod>2026-11-01T21:26:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-across-x-axis-y-axis-origin/sssssqno</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-across-x-axis-y-axis-origin/sssssqno"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-across-x-axis-y-axis-origin/sssssqno"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-across-x-axis-y-axis-origin/sssssqno"/>
      <lastmod>2026-11-01T21:28:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-across-x-axis-y-axis-origin/sssssqno</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-across-x-axis-y-axis-origin/sssssqno"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-across-x-axis-y-axis-origin/sssssqno"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-across-x-axis-y-axis-origin/sssssqno"/>
      <lastmod>2026-11-01T21:28:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-exploration-scaling-polygons-and-distance-relationships/sssssq2s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-exploration-scaling-polygons-and-distance-relationships/sssssq2s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-exploration-scaling-polygons-and-distance-relationships/sssssq2s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-exploration-scaling-polygons-and-distance-relationships/sssssq2s"/>
      <lastmod>2026-11-02T18:03:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-exploration-scaling-polygons-and-distance-relationships/sssssq2s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-exploration-scaling-polygons-and-distance-relationships/sssssq2s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-exploration-scaling-polygons-and-distance-relationships/sssssq2s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-exploration-scaling-polygons-and-distance-relationships/sssssq2s"/>
      <lastmod>2026-11-02T18:03:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-through-a-hyperbola/sssssq27</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-through-a-hyperbola/sssssq27"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-through-a-hyperbola/sssssq27"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-through-a-hyperbola/sssssq27"/>
      <lastmod>2026-11-01T23:25:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/segment-through-a-hyperbola/sssssq27</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-through-a-hyperbola/sssssq27"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-through-a-hyperbola/sssssq27"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-through-a-hyperbola/sssssq27"/>
      <lastmod>2026-11-01T23:25:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/like-terms-by-tmoorehead/sssssq2n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/like-terms-by-tmoorehead/sssssq2n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/like-terms-by-tmoorehead/sssssq2n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/like-terms-by-tmoorehead/sssssq2n"/>
      <lastmod>2026-11-02T18:52:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/like-terms-by-tmoorehead/sssssq2n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/like-terms-by-tmoorehead/sssssq2n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/like-terms-by-tmoorehead/sssssq2n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/like-terms-by-tmoorehead/sssssq2n"/>
      <lastmod>2026-11-02T18:52:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-table-quiz-from-6-to-9-level-2/sssssq22</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-table-quiz-from-6-to-9-level-2/sssssq22"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-table-quiz-from-6-to-9-level-2/sssssq22"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-table-quiz-from-6-to-9-level-2/sssssq22"/>
      <lastmod>2026-11-02T09:06:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-table-quiz-from-6-to-9-level-2/sssssq22</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-table-quiz-from-6-to-9-level-2/sssssq22"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-table-quiz-from-6-to-9-level-2/sssssq22"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-table-quiz-from-6-to-9-level-2/sssssq22"/>
      <lastmod>2026-11-02T09:06:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-vector-grid/sssssq2k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vector-grid/sssssq2k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vector-grid/sssssq2k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vector-grid/sssssq2k"/>
      <lastmod>2026-11-02T02:43:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-vector-grid/sssssq2k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vector-grid/sssssq2k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vector-grid/sssssq2k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vector-grid/sssssq2k"/>
      <lastmod>2026-11-02T02:43:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-example/sssssq2z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-example/sssssq2z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-example/sssssq2z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-example/sssssq2z"/>
      <lastmod>2026-11-01T22:03:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-example/sssssq2z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-example/sssssq2z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-example/sssssq2z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-example/sssssq2z"/>
      <lastmod>2026-11-01T22:03:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/re-parametrization-of-vector-functions-and-their-derivatives/sssssq20</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/re-parametrization-of-vector-functions-and-their-derivatives/sssssq20"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/re-parametrization-of-vector-functions-and-their-derivatives/sssssq20"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/re-parametrization-of-vector-functions-and-their-derivatives/sssssq20"/>
      <lastmod>2026-11-02T00:31:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/re-parametrization-of-vector-functions-and-their-derivatives/sssssq20</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/re-parametrization-of-vector-functions-and-their-derivatives/sssssq20"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/re-parametrization-of-vector-functions-and-their-derivatives/sssssq20"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/re-parametrization-of-vector-functions-and-their-derivatives/sssssq20"/>
      <lastmod>2026-11-02T00:31:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rolling-circle-spirograph/sssssq2d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rolling-circle-spirograph/sssssq2d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rolling-circle-spirograph/sssssq2d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rolling-circle-spirograph/sssssq2d"/>
      <lastmod>2026-11-01T19:15:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rolling-circle-spirograph/sssssq2d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rolling-circle-spirograph/sssssq2d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rolling-circle-spirograph/sssssq2d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rolling-circle-spirograph/sssssq2d"/>
      <lastmod>2026-11-01T19:15:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plane-and-distance-to-3-points/sssssq2f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-and-distance-to-3-points/sssssq2f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-and-distance-to-3-points/sssssq2f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-and-distance-to-3-points/sssssq2f"/>
      <lastmod>2026-11-02T12:02:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plane-and-distance-to-3-points/sssssq2f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-and-distance-to-3-points/sssssq2f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-and-distance-to-3-points/sssssq2f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-and-distance-to-3-points/sssssq2f"/>
      <lastmod>2026-11-02T12:02:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/irrational-number-sqrt-10-geogebra-demo/sssssq28</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/irrational-number-sqrt-10-geogebra-demo/sssssq28"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/irrational-number-sqrt-10-geogebra-demo/sssssq28"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/irrational-number-sqrt-10-geogebra-demo/sssssq28"/>
      <lastmod>2026-11-01T23:43:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/irrational-number-sqrt-10-geogebra-demo/sssssq28</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/irrational-number-sqrt-10-geogebra-demo/sssssq28"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/irrational-number-sqrt-10-geogebra-demo/sssssq28"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/irrational-number-sqrt-10-geogebra-demo/sssssq28"/>
      <lastmod>2026-11-01T23:43:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ebau-math-ii-b4-problem/sssssq2u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ebau-math-ii-b4-problem/sssssq2u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ebau-math-ii-b4-problem/sssssq2u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ebau-math-ii-b4-problem/sssssq2u"/>
      <lastmod>2026-11-01T21:53:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ebau-math-ii-b4-problem/sssssq2u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ebau-math-ii-b4-problem/sssssq2u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ebau-math-ii-b4-problem/sssssq2u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ebau-math-ii-b4-problem/sssssq2u"/>
      <lastmod>2026-11-01T21:53:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-trigonometric-equations-tan/sssssq25</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-trigonometric-equations-tan/sssssq25"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-trigonometric-equations-tan/sssssq25"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-trigonometric-equations-tan/sssssq25"/>
      <lastmod>2026-11-01T21:23:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-trigonometric-equations-tan/sssssq25</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-trigonometric-equations-tan/sssssq25"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-trigonometric-equations-tan/sssssq25"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-trigonometric-equations-tan/sssssq25"/>
      <lastmod>2026-11-01T21:23:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-section-of-two-intersecting-cylinders/sssssq2b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-two-intersecting-cylinders/sssssq2b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-two-intersecting-cylinders/sssssq2b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-two-intersecting-cylinders/sssssq2b"/>
      <lastmod>2026-11-02T18:37:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-section-of-two-intersecting-cylinders/sssssq2b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-two-intersecting-cylinders/sssssq2b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-two-intersecting-cylinders/sssssq2b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-two-intersecting-cylinders/sssssq2b"/>
      <lastmod>2026-11-02T18:37:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-volume-demonstration-by-nur-fatimah-zolkiffli/sssssq23</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-demonstration-by-nur-fatimah-zolkiffli/sssssq23"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-demonstration-by-nur-fatimah-zolkiffli/sssssq23"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-demonstration-by-nur-fatimah-zolkiffli/sssssq23"/>
      <lastmod>2026-11-02T18:30:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-volume-demonstration-by-nur-fatimah-zolkiffli/sssssq23</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-demonstration-by-nur-fatimah-zolkiffli/sssssq23"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-demonstration-by-nur-fatimah-zolkiffli/sssssq23"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-demonstration-by-nur-fatimah-zolkiffli/sssssq23"/>
      <lastmod>2026-11-02T18:30:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/classifying-stationary-points-with-the-2nd-derivative/sssssq2q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-stationary-points-with-the-2nd-derivative/sssssq2q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-stationary-points-with-the-2nd-derivative/sssssq2q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-stationary-points-with-the-2nd-derivative/sssssq2q"/>
      <lastmod>2026-11-01T23:47:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/classifying-stationary-points-with-the-2nd-derivative/sssssq2q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-stationary-points-with-the-2nd-derivative/sssssq2q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-stationary-points-with-the-2nd-derivative/sssssq2q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-stationary-points-with-the-2nd-derivative/sssssq2q"/>
      <lastmod>2026-11-01T23:47:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/1-proportion-simulation-hypergeometric-sampling-with-dot-plot/sssssq21</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/1-proportion-simulation-hypergeometric-sampling-with-dot-plot/sssssq21"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/1-proportion-simulation-hypergeometric-sampling-with-dot-plot/sssssq21"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/1-proportion-simulation-hypergeometric-sampling-with-dot-plot/sssssq21"/>
      <lastmod>2026-11-02T18:09:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/1-proportion-simulation-hypergeometric-sampling-with-dot-plot/sssssq21</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/1-proportion-simulation-hypergeometric-sampling-with-dot-plot/sssssq21"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/1-proportion-simulation-hypergeometric-sampling-with-dot-plot/sssssq21"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/1-proportion-simulation-hypergeometric-sampling-with-dot-plot/sssssq21"/>
      <lastmod>2026-11-02T18:09:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-task-2/sssssq2m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-task-2/sssssq2m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-task-2/sssssq2m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-task-2/sssssq2m"/>
      <lastmod>2026-11-02T17:50:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-task-2/sssssq2m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-task-2/sssssq2m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-task-2/sssssq2m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-task-2/sssssq2m"/>
      <lastmod>2026-11-02T17:50:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-rectangles-interactive-proportionality-practice/sssssq2j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-rectangles-interactive-proportionality-practice/sssssq2j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-rectangles-interactive-proportionality-practice/sssssq2j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-rectangles-interactive-proportionality-practice/sssssq2j"/>
      <lastmod>2026-11-02T00:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-rectangles-interactive-proportionality-practice/sssssq2j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-rectangles-interactive-proportionality-practice/sssssq2j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-rectangles-interactive-proportionality-practice/sssssq2j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-rectangles-interactive-proportionality-practice/sssssq2j"/>
      <lastmod>2026-11-02T00:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-derivative-function-and-tangent-to-the-curve/sssssq2p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-derivative-function-and-tangent-to-the-curve/sssssq2p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-derivative-function-and-tangent-to-the-curve/sssssq2p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-derivative-function-and-tangent-to-the-curve/sssssq2p"/>
      <lastmod>2026-11-02T00:18:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-derivative-function-and-tangent-to-the-curve/sssssq2p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-derivative-function-and-tangent-to-the-curve/sssssq2p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-derivative-function-and-tangent-to-the-curve/sssssq2p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-derivative-function-and-tangent-to-the-curve/sssssq2p"/>
      <lastmod>2026-11-02T00:18:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-transformations/sssssq2w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-transformations/sssssq2w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-transformations/sssssq2w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-transformations/sssssq2w"/>
      <lastmod>2026-11-02T13:38:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-transformations/sssssq2w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-transformations/sssssq2w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-transformations/sssssq2w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-transformations/sssssq2w"/>
      <lastmod>2026-11-02T13:38:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-linear-combination-of-vectors/sssssq26</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-linear-combination-of-vectors/sssssq26"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-linear-combination-of-vectors/sssssq26"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-linear-combination-of-vectors/sssssq26"/>
      <lastmod>2026-11-02T16:37:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-linear-combination-of-vectors/sssssq26</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-linear-combination-of-vectors/sssssq26"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-linear-combination-of-vectors/sssssq26"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-linear-combination-of-vectors/sssssq26"/>
      <lastmod>2026-11-02T16:37:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-volumes-of-revolution/sssssq2g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-volumes-of-revolution/sssssq2g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-volumes-of-revolution/sssssq2g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-volumes-of-revolution/sssssq2g"/>
      <lastmod>2026-11-02T16:37:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-volumes-of-revolution/sssssq2g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-volumes-of-revolution/sssssq2g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-volumes-of-revolution/sssssq2g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-volumes-of-revolution/sssssq2g"/>
      <lastmod>2026-11-02T16:37:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-3d-beginner-tutorial-exercise-2/sssssq29</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-3d-beginner-tutorial-exercise-2/sssssq29"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-3d-beginner-tutorial-exercise-2/sssssq29"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-3d-beginner-tutorial-exercise-2/sssssq29"/>
      <lastmod>2026-11-01T21:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-3d-beginner-tutorial-exercise-2/sssssq29</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-3d-beginner-tutorial-exercise-2/sssssq29"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-3d-beginner-tutorial-exercise-2/sssssq29"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-3d-beginner-tutorial-exercise-2/sssssq29"/>
      <lastmod>2026-11-01T21:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations-by-robyn-porter-2/sssssq2e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations-by-robyn-porter-2/sssssq2e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-rotations-dilations-and-translations-by-robyn-porter-2/sssssq2e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations-by-robyn-porter-2/sssssq2e"/>
      <lastmod>2026-11-01T23:17:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-rotations-dilations-and-translations-by-robyn-porter-2/sssssq2e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations-by-robyn-porter-2/sssssq2e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-rotations-dilations-and-translations-by-robyn-porter-2/sssssq2e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations-by-robyn-porter-2/sssssq2e"/>
      <lastmod>2026-11-01T23:17:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractal-curve-2-iterated-semicircle-construction/sssssq2v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-curve-2-iterated-semicircle-construction/sssssq2v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-curve-2-iterated-semicircle-construction/sssssq2v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-curve-2-iterated-semicircle-construction/sssssq2v"/>
      <lastmod>2026-11-01T21:22:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractal-curve-2-iterated-semicircle-construction/sssssq2v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-curve-2-iterated-semicircle-construction/sssssq2v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-curve-2-iterated-semicircle-construction/sssssq2v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-curve-2-iterated-semicircle-construction/sssssq2v"/>
      <lastmod>2026-11-01T21:22:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fibonacci-spiral-number-line/sssssq24</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fibonacci-spiral-number-line/sssssq24"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fibonacci-spiral-number-line/sssssq24"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fibonacci-spiral-number-line/sssssq24"/>
      <lastmod>2026-11-02T17:35:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fibonacci-spiral-number-line/sssssq24</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fibonacci-spiral-number-line/sssssq24"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fibonacci-spiral-number-line/sssssq24"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fibonacci-spiral-number-line/sssssq24"/>
      <lastmod>2026-11-02T17:35:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shearer-action-4-geometric-construction-and-symmetry/sssssq2l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shearer-action-4-geometric-construction-and-symmetry/sssssq2l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shearer-action-4-geometric-construction-and-symmetry/sssssq2l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shearer-action-4-geometric-construction-and-symmetry/sssssq2l"/>
      <lastmod>2026-11-02T02:28:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shearer-action-4-geometric-construction-and-symmetry/sssssq2l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shearer-action-4-geometric-construction-and-symmetry/sssssq2l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shearer-action-4-geometric-construction-and-symmetry/sssssq2l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shearer-action-4-geometric-construction-and-symmetry/sssssq2l"/>
      <lastmod>2026-11-02T02:28:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-3/sssssq2y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-3/sssssq2y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-problem-3/sssssq2y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-3/sssssq2y"/>
      <lastmod>2026-11-02T00:46:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/segment-addition-postulate-problem-3/sssssq2y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-3/sssssq2y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-problem-3/sssssq2y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-3/sssssq2y"/>
      <lastmod>2026-11-02T00:46:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-pyramid/sssssq2a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-pyramid/sssssq2a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-pyramid/sssssq2a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-pyramid/sssssq2a"/>
      <lastmod>2026-11-01T19:14:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-pyramid/sssssq2a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-pyramid/sssssq2a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-pyramid/sssssq2a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-pyramid/sssssq2a"/>
      <lastmod>2026-11-01T19:14:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/easter-egg-travel/sssssq2c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/easter-egg-travel/sssssq2c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/easter-egg-travel/sssssq2c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/easter-egg-travel/sssssq2c"/>
      <lastmod>2026-11-01T19:03:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/easter-egg-travel/sssssq2c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/easter-egg-travel/sssssq2c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/easter-egg-travel/sssssq2c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/easter-egg-travel/sssssq2c"/>
      <lastmod>2026-11-01T19:03:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-correlation-coefficient-scatter-plots/sssssq2r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-correlation-coefficient-scatter-plots/sssssq2r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-correlation-coefficient-scatter-plots/sssssq2r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-correlation-coefficient-scatter-plots/sssssq2r"/>
      <lastmod>2026-11-02T08:40:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-correlation-coefficient-scatter-plots/sssssq2r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-correlation-coefficient-scatter-plots/sssssq2r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-correlation-coefficient-scatter-plots/sssssq2r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-correlation-coefficient-scatter-plots/sssssq2r"/>
      <lastmod>2026-11-02T08:40:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-partition/sssssq2h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-partition/sssssq2h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-partition/sssssq2h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-partition/sssssq2h"/>
      <lastmod>2026-11-02T02:17:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-partition/sssssq2h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-partition/sssssq2h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-partition/sssssq2h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-partition/sssssq2h"/>
      <lastmod>2026-11-02T02:17:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-quiz-on-exponents-and-logarithms/sssssq2t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-quiz-on-exponents-and-logarithms/sssssq2t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-quiz-on-exponents-and-logarithms/sssssq2t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-quiz-on-exponents-and-logarithms/sssssq2t"/>
      <lastmod>2026-11-02T12:30:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-quiz-on-exponents-and-logarithms/sssssq2t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-quiz-on-exponents-and-logarithms/sssssq2t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-quiz-on-exponents-and-logarithms/sssssq2t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-quiz-on-exponents-and-logarithms/sssssq2t"/>
      <lastmod>2026-11-02T12:30:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-exercise-4-number-theory-and-geometric-transformations/sssssq2x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-exercise-4-number-theory-and-geometric-transformations/sssssq2x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-exercise-4-number-theory-and-geometric-transformations/sssssq2x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-exercise-4-number-theory-and-geometric-transformations/sssssq2x"/>
      <lastmod>2026-11-02T18:08:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-exercise-4-number-theory-and-geometric-transformations/sssssq2x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-exercise-4-number-theory-and-geometric-transformations/sssssq2x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-exercise-4-number-theory-and-geometric-transformations/sssssq2x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-exercise-4-number-theory-and-geometric-transformations/sssssq2x"/>
      <lastmod>2026-11-02T18:08:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-loizos-loizou/sssssq2i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-loizos-loizou/sssssq2i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-calculation-by-loizos-loizou/sssssq2i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-loizos-loizou/sssssq2i"/>
      <lastmod>2026-11-02T16:49:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-area-calculation-by-loizos-loizou/sssssq2i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-loizos-loizou/sssssq2i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-calculation-by-loizos-loizou/sssssq2i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-loizos-loizou/sssssq2i"/>
      <lastmod>2026-11-02T16:49:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-factoring-trinomials/sssssq2o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-factoring-trinomials/sssssq2o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-factoring-trinomials/sssssq2o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-factoring-trinomials/sssssq2o"/>
      <lastmod>2026-11-02T13:13:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-factoring-trinomials/sssssq2o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-factoring-trinomials/sssssq2o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-factoring-trinomials/sssssq2o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-factoring-trinomials/sssssq2o"/>
      <lastmod>2026-11-02T13:13:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/centroids-and-orthocenters-in-quadrilaterals/sssssqks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroids-and-orthocenters-in-quadrilaterals/sssssqks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroids-and-orthocenters-in-quadrilaterals/sssssqks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroids-and-orthocenters-in-quadrilaterals/sssssqks"/>
      <lastmod>2026-11-01T23:12:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/centroids-and-orthocenters-in-quadrilaterals/sssssqks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroids-and-orthocenters-in-quadrilaterals/sssssqks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroids-and-orthocenters-in-quadrilaterals/sssssqks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroids-and-orthocenters-in-quadrilaterals/sssssqks"/>
      <lastmod>2026-11-01T23:12:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-dilations/sssssqk7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-dilations/sssssqk7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-dilations/sssssqk7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-dilations/sssssqk7"/>
      <lastmod>2026-11-01T22:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-dilations/sssssqk7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-dilations/sssssqk7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-dilations/sssssqk7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-dilations/sssssqk7"/>
      <lastmod>2026-11-01T22:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-by-becnel-viii/sssssqkn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-by-becnel-viii/sssssqkn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-by-becnel-viii/sssssqkn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-by-becnel-viii/sssssqkn"/>
      <lastmod>2026-11-02T18:11:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-by-becnel-viii/sssssqkn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-by-becnel-viii/sssssqkn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-by-becnel-viii/sssssqkn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-by-becnel-viii/sssssqkn"/>
      <lastmod>2026-11-02T18:11:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-y-mx-b-line-appearance/sssssqk2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-y-mx-b-line-appearance/sssssqk2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-y-mx-b-line-appearance/sssssqk2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-y-mx-b-line-appearance/sssssqk2"/>
      <lastmod>2026-11-01T19:19:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-y-mx-b-line-appearance/sssssqk2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-y-mx-b-line-appearance/sssssqk2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-y-mx-b-line-appearance/sssssqk2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-y-mx-b-line-appearance/sssssqk2"/>
      <lastmod>2026-11-01T19:19:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthogonal-projection-of-v-over-u-by-louise-roy/sssssqkk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthogonal-projection-of-v-over-u-by-louise-roy/sssssqkk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthogonal-projection-of-v-over-u-by-louise-roy/sssssqkk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthogonal-projection-of-v-over-u-by-louise-roy/sssssqkk"/>
      <lastmod>2026-11-02T16:59:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthogonal-projection-of-v-over-u-by-louise-roy/sssssqkk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthogonal-projection-of-v-over-u-by-louise-roy/sssssqkk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthogonal-projection-of-v-over-u-by-louise-roy/sssssqkk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthogonal-projection-of-v-over-u-by-louise-roy/sssssqkk"/>
      <lastmod>2026-11-02T16:59:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-graphing-quiz/sssssqkz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-graphing-quiz/sssssqkz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-graphing-quiz/sssssqkz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-graphing-quiz/sssssqkz"/>
      <lastmod>2026-11-02T16:29:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-graphing-quiz/sssssqkz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-graphing-quiz/sssssqkz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-graphing-quiz/sssssqkz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-graphing-quiz/sssssqkz"/>
      <lastmod>2026-11-02T16:29:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-investigation/sssssqk0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-investigation/sssssqk0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-investigation/sssssqk0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-investigation/sssssqk0"/>
      <lastmod>2026-11-02T08:35:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-investigation/sssssqk0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-investigation/sssssqk0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-investigation/sssssqk0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-investigation/sssssqk0"/>
      <lastmod>2026-11-02T08:35:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflective-symmetry-of-a-rhombus/sssssqkd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflective-symmetry-of-a-rhombus/sssssqkd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflective-symmetry-of-a-rhombus/sssssqkd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflective-symmetry-of-a-rhombus/sssssqkd"/>
      <lastmod>2026-11-02T08:44:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflective-symmetry-of-a-rhombus/sssssqkd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflective-symmetry-of-a-rhombus/sssssqkd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflective-symmetry-of-a-rhombus/sssssqkd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflective-symmetry-of-a-rhombus/sssssqkd"/>
      <lastmod>2026-11-02T08:44:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/centroid-and-conic-sections/sssssqkf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-and-conic-sections/sssssqkf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-and-conic-sections/sssssqkf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-and-conic-sections/sssssqkf"/>
      <lastmod>2026-11-02T15:13:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/centroid-and-conic-sections/sssssqkf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-and-conic-sections/sssssqkf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-and-conic-sections/sssssqkf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-and-conic-sections/sssssqkf"/>
      <lastmod>2026-11-02T15:13:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-and-trapezoid-sums/sssssqk8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-and-trapezoid-sums/sssssqk8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-and-trapezoid-sums/sssssqk8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-and-trapezoid-sums/sssssqk8"/>
      <lastmod>2026-11-02T18:39:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-and-trapezoid-sums/sssssqk8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-and-trapezoid-sums/sssssqk8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-and-trapezoid-sums/sssssqk8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-and-trapezoid-sums/sssssqk8"/>
      <lastmod>2026-11-02T18:39:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/paraboloid-with-double-integral-volume/sssssqku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paraboloid-with-double-integral-volume/sssssqku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paraboloid-with-double-integral-volume/sssssqku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paraboloid-with-double-integral-volume/sssssqku"/>
      <lastmod>2026-11-02T16:32:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/paraboloid-with-double-integral-volume/sssssqku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paraboloid-with-double-integral-volume/sssssqku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paraboloid-with-double-integral-volume/sssssqku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paraboloid-with-double-integral-volume/sssssqku"/>
      <lastmod>2026-11-02T16:32:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-24659/sssssqk5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-24659/sssssqk5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter-by-24659/sssssqk5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-24659/sssssqk5"/>
      <lastmod>2026-11-02T13:31:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter-by-24659/sssssqk5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-24659/sssssqk5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter-by-24659/sssssqk5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-24659/sssssqk5"/>
      <lastmod>2026-11-02T13:31:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/review-on-gradient-and-y-intercept-for-linear-equations/sssssqkb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/review-on-gradient-and-y-intercept-for-linear-equations/sssssqkb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/review-on-gradient-and-y-intercept-for-linear-equations/sssssqkb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/review-on-gradient-and-y-intercept-for-linear-equations/sssssqkb"/>
      <lastmod>2026-11-02T02:25:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/review-on-gradient-and-y-intercept-for-linear-equations/sssssqkb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/review-on-gradient-and-y-intercept-for-linear-equations/sssssqkb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/review-on-gradient-and-y-intercept-for-linear-equations/sssssqkb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/review-on-gradient-and-y-intercept-for-linear-equations/sssssqkb"/>
      <lastmod>2026-11-02T02:25:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lines-from-points-and-vectors/sssssqk3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-from-points-and-vectors/sssssqk3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-from-points-and-vectors/sssssqk3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-from-points-and-vectors/sssssqk3"/>
      <lastmod>2026-11-02T09:47:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lines-from-points-and-vectors/sssssqk3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-from-points-and-vectors/sssssqk3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-from-points-and-vectors/sssssqk3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-from-points-and-vectors/sssssqk3"/>
      <lastmod>2026-11-02T09:47:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-bisector-construction-by-abecktold/sssssqkq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-by-abecktold/sssssqkq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-construction-by-abecktold/sssssqkq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-by-abecktold/sssssqkq"/>
      <lastmod>2026-11-01T21:31:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-bisector-construction-by-abecktold/sssssqkq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-by-abecktold/sssssqkq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-construction-by-abecktold/sssssqkq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-by-abecktold/sssssqkq"/>
      <lastmod>2026-11-01T21:31:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-powers-with-negative-integer-exponents/sssssqk1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-powers-with-negative-integer-exponents/sssssqk1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-powers-with-negative-integer-exponents/sssssqk1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-powers-with-negative-integer-exponents/sssssqk1"/>
      <lastmod>2026-11-02T00:18:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-powers-with-negative-integer-exponents/sssssqk1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-powers-with-negative-integer-exponents/sssssqk1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-powers-with-negative-integer-exponents/sssssqk1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-powers-with-negative-integer-exponents/sssssqk1"/>
      <lastmod>2026-11-02T00:18:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruence-theorems-dynamic-geometric-construction/sssssqkm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-theorems-dynamic-geometric-construction/sssssqkm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-theorems-dynamic-geometric-construction/sssssqkm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-theorems-dynamic-geometric-construction/sssssqkm"/>
      <lastmod>2026-11-02T18:34:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruence-theorems-dynamic-geometric-construction/sssssqkm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-theorems-dynamic-geometric-construction/sssssqkm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-theorems-dynamic-geometric-construction/sssssqkm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-theorems-dynamic-geometric-construction/sssssqkm"/>
      <lastmod>2026-11-02T18:34:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-triangle-congruence-tests-demo/sssssqkj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-triangle-congruence-tests-demo/sssssqkj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-triangle-congruence-tests-demo/sssssqkj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-triangle-congruence-tests-demo/sssssqkj"/>
      <lastmod>2026-11-02T00:33:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-triangle-congruence-tests-demo/sssssqkj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-triangle-congruence-tests-demo/sssssqkj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-triangle-congruence-tests-demo/sssssqkj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-triangle-congruence-tests-demo/sssssqkj"/>
      <lastmod>2026-11-02T00:33:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-by-andreas-lindner/sssssqkp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-by-andreas-lindner/sssssqkp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-by-andreas-lindner/sssssqkp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-by-andreas-lindner/sssssqkp"/>
      <lastmod>2026-11-02T12:08:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-by-andreas-lindner/sssssqkp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-by-andreas-lindner/sssssqkp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-by-andreas-lindner/sssssqkp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-by-andreas-lindner/sssssqkp"/>
      <lastmod>2026-11-02T12:08:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-parametric-curves/sssssqkw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-parametric-curves/sssssqkw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-parametric-curves/sssssqkw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-parametric-curves/sssssqkw"/>
      <lastmod>2026-11-02T18:53:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-parametric-curves/sssssqkw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-parametric-curves/sssssqkw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-parametric-curves/sssssqkw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-parametric-curves/sssssqkw"/>
      <lastmod>2026-11-02T18:53:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-polygon-phenomena-3/sssssqk6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygon-phenomena-3/sssssqk6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygon-phenomena-3/sssssqk6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygon-phenomena-3/sssssqk6"/>
      <lastmod>2026-11-01T23:32:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-polygon-phenomena-3/sssssqk6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygon-phenomena-3/sssssqk6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygon-phenomena-3/sssssqk6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygon-phenomena-3/sssssqk6"/>
      <lastmod>2026-11-01T23:32:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sas-congruence-demonstration-why-the-angle-must-be-included/sssssqkg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-congruence-demonstration-why-the-angle-must-be-included/sssssqkg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-congruence-demonstration-why-the-angle-must-be-included/sssssqkg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-congruence-demonstration-why-the-angle-must-be-included/sssssqkg"/>
      <lastmod>2026-11-01T19:07:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sas-congruence-demonstration-why-the-angle-must-be-included/sssssqkg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-congruence-demonstration-why-the-angle-must-be-included/sssssqkg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-congruence-demonstration-why-the-angle-must-be-included/sssssqkg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-congruence-demonstration-why-the-angle-must-be-included/sssssqkg"/>
      <lastmod>2026-11-01T19:07:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-under-a-curve-using-an-integral/sssssqk9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-a-curve-using-an-integral/sssssqk9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-a-curve-using-an-integral/sssssqk9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-a-curve-using-an-integral/sssssqk9"/>
      <lastmod>2026-11-02T02:29:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-under-a-curve-using-an-integral/sssssqk9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-a-curve-using-an-integral/sssssqk9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-a-curve-using-an-integral/sssssqk9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-a-curve-using-an-integral/sssssqk9"/>
      <lastmod>2026-11-02T02:29:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parameterized-curve-and-locus-demo/sssssqke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parameterized-curve-and-locus-demo/sssssqke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parameterized-curve-and-locus-demo/sssssqke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parameterized-curve-and-locus-demo/sssssqke"/>
      <lastmod>2026-11-02T18:36:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parameterized-curve-and-locus-demo/sssssqke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parameterized-curve-and-locus-demo/sssssqke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parameterized-curve-and-locus-demo/sssssqke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parameterized-curve-and-locus-demo/sssssqke"/>
      <lastmod>2026-11-02T18:36:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/g-gco-9-isosceles-triangles-interactive-discovery-of-the-converse-theorem/sssssqkv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/g-gco-9-isosceles-triangles-interactive-discovery-of-the-converse-theorem/sssssqkv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/g-gco-9-isosceles-triangles-interactive-discovery-of-the-converse-theorem/sssssqkv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/g-gco-9-isosceles-triangles-interactive-discovery-of-the-converse-theorem/sssssqkv"/>
      <lastmod>2026-11-01T21:37:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/g-gco-9-isosceles-triangles-interactive-discovery-of-the-converse-theorem/sssssqkv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/g-gco-9-isosceles-triangles-interactive-discovery-of-the-converse-theorem/sssssqkv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/g-gco-9-isosceles-triangles-interactive-discovery-of-the-converse-theorem/sssssqkv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/g-gco-9-isosceles-triangles-interactive-discovery-of-the-converse-theorem/sssssqkv"/>
      <lastmod>2026-11-01T21:37:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/enlargement-game-find-the-image-positive-scale-factor-only/sssssqk4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/enlargement-game-find-the-image-positive-scale-factor-only/sssssqk4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/enlargement-game-find-the-image-positive-scale-factor-only/sssssqk4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/enlargement-game-find-the-image-positive-scale-factor-only/sssssqk4"/>
      <lastmod>2026-11-01T21:24:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/enlargement-game-find-the-image-positive-scale-factor-only/sssssqk4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/enlargement-game-find-the-image-positive-scale-factor-only/sssssqk4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/enlargement-game-find-the-image-positive-scale-factor-only/sssssqk4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/enlargement-game-find-the-image-positive-scale-factor-only/sssssqk4"/>
      <lastmod>2026-11-01T21:24:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-in-four-forms/sssssqkl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-in-four-forms/sssssqkl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-in-four-forms/sssssqkl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-in-four-forms/sssssqkl"/>
      <lastmod>2026-11-01T23:27:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-in-four-forms/sssssqkl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-in-four-forms/sssssqkl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-in-four-forms/sssssqkl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-in-four-forms/sssssqkl"/>
      <lastmod>2026-11-01T23:27:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/elliptic-cone-intersection-construction/sssssqky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptic-cone-intersection-construction/sssssqky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptic-cone-intersection-construction/sssssqky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptic-cone-intersection-construction/sssssqky"/>
      <lastmod>2026-11-01T21:27:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/elliptic-cone-intersection-construction/sssssqky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptic-cone-intersection-construction/sssssqky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptic-cone-intersection-construction/sssssqky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptic-cone-intersection-construction/sssssqky"/>
      <lastmod>2026-11-01T21:27:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/joining-midpoints-of-quadrilateral-sides/sssssqka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/joining-midpoints-of-quadrilateral-sides/sssssqka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/joining-midpoints-of-quadrilateral-sides/sssssqka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/joining-midpoints-of-quadrilateral-sides/sssssqka"/>
      <lastmod>2026-11-01T21:23:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/joining-midpoints-of-quadrilateral-sides/sssssqka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/joining-midpoints-of-quadrilateral-sides/sssssqka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/joining-midpoints-of-quadrilateral-sides/sssssqka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/joining-midpoints-of-quadrilateral-sides/sssssqka"/>
      <lastmod>2026-11-01T21:23:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reasoning-to-find-area/sssssqkc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-to-find-area/sssssqkc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-to-find-area/sssssqkc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-to-find-area/sssssqkc"/>
      <lastmod>2026-11-02T10:40:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reasoning-to-find-area/sssssqkc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-to-find-area/sssssqkc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-to-find-area/sssssqkc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-to-find-area/sssssqkc"/>
      <lastmod>2026-11-02T10:40:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-a-parallel-line/sssssqkr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-parallel-line/sssssqkr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-parallel-line/sssssqkr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-parallel-line/sssssqkr"/>
      <lastmod>2026-11-01T23:22:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-a-parallel-line/sssssqkr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-parallel-line/sssssqkr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-parallel-line/sssssqkr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-parallel-line/sssssqkr"/>
      <lastmod>2026-11-01T23:22:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-around-the-x-axis/sssssqkh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-around-the-x-axis/sssssqkh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-around-the-x-axis/sssssqkh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-around-the-x-axis/sssssqkh"/>
      <lastmod>2026-11-01T19:14:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-around-the-x-axis/sssssqkh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-around-the-x-axis/sssssqkh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-around-the-x-axis/sssssqkh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-around-the-x-axis/sssssqkh"/>
      <lastmod>2026-11-01T19:14:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-and-equilateral-triangles/sssssqkt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-equilateral-triangles/sssssqkt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-equilateral-triangles/sssssqkt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-equilateral-triangles/sssssqkt"/>
      <lastmod>2026-11-02T18:17:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-and-equilateral-triangles/sssssqkt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-equilateral-triangles/sssssqkt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-equilateral-triangles/sssssqkt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-equilateral-triangles/sssssqkt"/>
      <lastmod>2026-11-02T18:17:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-by-martin-graham-2/sssssqkx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-martin-graham-2/sssssqkx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-martin-graham-2/sssssqkx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-martin-graham-2/sssssqkx"/>
      <lastmod>2026-11-02T00:34:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-by-martin-graham-2/sssssqkx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-martin-graham-2/sssssqkx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-martin-graham-2/sssssqkx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-martin-graham-2/sssssqkx"/>
      <lastmod>2026-11-02T00:34:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-and-area/sssssqki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-and-area/sssssqki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-and-area/sssssqki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-and-area/sssssqki"/>
      <lastmod>2026-11-02T02:31:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-and-area/sssssqki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-and-area/sssssqki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-and-area/sssssqki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-and-area/sssssqki"/>
      <lastmod>2026-11-02T02:31:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-compound-inequalities/sssssqko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-compound-inequalities/sssssqko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-compound-inequalities/sssssqko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-compound-inequalities/sssssqko"/>
      <lastmod>2026-11-01T21:19:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-compound-inequalities/sssssqko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-compound-inequalities/sssssqko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-compound-inequalities/sssssqko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-compound-inequalities/sssssqko"/>
      <lastmod>2026-11-01T21:19:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-ricard/sssssqzs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-ricard/sssssqzs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-rectangles-and-squares-by-ricard/sssssqzs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-ricard/sssssqzs"/>
      <lastmod>2026-11-02T18:36:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-rectangles-and-squares-by-ricard/sssssqzs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-ricard/sssssqzs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-rectangles-and-squares-by-ricard/sssssqzs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-rectangles-and-squares-by-ricard/sssssqzs"/>
      <lastmod>2026-11-02T18:36:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diagonals-of-rectangle/sssssqz7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-rectangle/sssssqz7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-rectangle/sssssqz7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-rectangle/sssssqz7"/>
      <lastmod>2026-11-02T08:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diagonals-of-rectangle/sssssqz7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-rectangle/sssssqz7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-rectangle/sssssqz7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-rectangle/sssssqz7"/>
      <lastmod>2026-11-02T08:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/throwing-darts-at-a-circle/sssssqzn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/throwing-darts-at-a-circle/sssssqzn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/throwing-darts-at-a-circle/sssssqzn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/throwing-darts-at-a-circle/sssssqzn"/>
      <lastmod>2026-11-01T21:59:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/throwing-darts-at-a-circle/sssssqzn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/throwing-darts-at-a-circle/sssssqzn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/throwing-darts-at-a-circle/sssssqzn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/throwing-darts-at-a-circle/sssssqzn"/>
      <lastmod>2026-11-01T21:59:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-linear-equations-self-practice/sssssqz2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-linear-equations-self-practice/sssssqz2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-linear-equations-self-practice/sssssqz2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-linear-equations-self-practice/sssssqz2"/>
      <lastmod>2026-11-01T19:10:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-linear-equations-self-practice/sssssqz2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-linear-equations-self-practice/sssssqz2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-linear-equations-self-practice/sssssqz2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-linear-equations-self-practice/sssssqz2"/>
      <lastmod>2026-11-01T19:10:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-items-to-match-ratio/sssssqzk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-items-to-match-ratio/sssssqzk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-items-to-match-ratio/sssssqzk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-items-to-match-ratio/sssssqzk"/>
      <lastmod>2026-11-02T18:05:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-items-to-match-ratio/sssssqzk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-items-to-match-ratio/sssssqzk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-items-to-match-ratio/sssssqzk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-items-to-match-ratio/sssssqzk"/>
      <lastmod>2026-11-02T18:05:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-right-triangle-ratios/sssssqzz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-right-triangle-ratios/sssssqzz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-right-triangle-ratios/sssssqzz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-right-triangle-ratios/sssssqzz"/>
      <lastmod>2026-11-01T21:01:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-right-triangle-ratios/sssssqzz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-right-triangle-ratios/sssssqzz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-right-triangle-ratios/sssssqzz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-right-triangle-ratios/sssssqzz"/>
      <lastmod>2026-11-01T21:01:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-from-rise-and-run/sssssqz0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-from-rise-and-run/sssssqz0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-from-rise-and-run/sssssqz0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-from-rise-and-run/sssssqz0"/>
      <lastmod>2026-11-01T19:24:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-from-rise-and-run/sssssqz0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-from-rise-and-run/sssssqz0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-from-rise-and-run/sssssqz0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-from-rise-and-run/sssssqz0"/>
      <lastmod>2026-11-01T19:24:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-trig-generator-v1-2/sssssqzd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-trig-generator-v1-2/sssssqzd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-trig-generator-v1-2/sssssqzd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-trig-generator-v1-2/sssssqzd"/>
      <lastmod>2026-11-02T18:19:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-trig-generator-v1-2/sssssqzd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-trig-generator-v1-2/sssssqzd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-trig-generator-v1-2/sssssqzd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-trig-generator-v1-2/sssssqzd"/>
      <lastmod>2026-11-02T18:19:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-prism-net/sssssqzf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-net/sssssqzf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-net/sssssqzf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-net/sssssqzf"/>
      <lastmod>2026-11-02T03:18:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-prism-net/sssssqzf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-net/sssssqzf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-net/sssssqzf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-net/sssssqzf"/>
      <lastmod>2026-11-02T03:18:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-activity-by-audri-mccready/sssssqz8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-activity-by-audri-mccready/sssssqz8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-activity-by-audri-mccready/sssssqz8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-activity-by-audri-mccready/sssssqz8"/>
      <lastmod>2026-11-01T19:01:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-activity-by-audri-mccready/sssssqz8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-activity-by-audri-mccready/sssssqz8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-activity-by-audri-mccready/sssssqz8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-activity-by-audri-mccready/sssssqz8"/>
      <lastmod>2026-11-01T19:01:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-intervals/sssssqzu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-intervals/sssssqzu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-intervals/sssssqzu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-intervals/sssssqzu"/>
      <lastmod>2026-11-01T21:35:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-intervals/sssssqzu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-intervals/sssssqzu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-intervals/sssssqzu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-intervals/sssssqzu"/>
      <lastmod>2026-11-01T21:35:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/study-inequalities-on-number-line-adjust-display-position/sssssqz5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/study-inequalities-on-number-line-adjust-display-position/sssssqz5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/study-inequalities-on-number-line-adjust-display-position/sssssqz5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/study-inequalities-on-number-line-adjust-display-position/sssssqz5"/>
      <lastmod>2026-11-01T20:49:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/study-inequalities-on-number-line-adjust-display-position/sssssqz5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/study-inequalities-on-number-line-adjust-display-position/sssssqz5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/study-inequalities-on-number-line-adjust-display-position/sssssqz5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/study-inequalities-on-number-line-adjust-display-position/sssssqz5"/>
      <lastmod>2026-11-01T20:49:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discover-the-area-formula-for-a-triangle/sssssqzb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discover-the-area-formula-for-a-triangle/sssssqzb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discover-the-area-formula-for-a-triangle/sssssqzb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discover-the-area-formula-for-a-triangle/sssssqzb"/>
      <lastmod>2026-11-02T18:13:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discover-the-area-formula-for-a-triangle/sssssqzb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discover-the-area-formula-for-a-triangle/sssssqzb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discover-the-area-formula-for-a-triangle/sssssqzb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discover-the-area-formula-for-a-triangle/sssssqzb"/>
      <lastmod>2026-11-02T18:13:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-rounding-to-the-nearest-10-demo/sssssqz3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-rounding-to-the-nearest-10-demo/sssssqz3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-rounding-to-the-nearest-10-demo/sssssqz3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-rounding-to-the-nearest-10-demo/sssssqz3"/>
      <lastmod>2026-11-02T17:07:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-rounding-to-the-nearest-10-demo/sssssqz3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-rounding-to-the-nearest-10-demo/sssssqz3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-rounding-to-the-nearest-10-demo/sssssqz3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-rounding-to-the-nearest-10-demo/sssssqz3"/>
      <lastmod>2026-11-02T17:07:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-3/sssssqzq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-3/sssssqzq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-3/sssssqzq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-3/sssssqzq"/>
      <lastmod>2026-11-02T06:10:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-3/sssssqzq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-3/sssssqzq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-3/sssssqzq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-3/sssssqzq"/>
      <lastmod>2026-11-02T06:10:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ant-on-a-cube-activity-2-paths-and-expected-values/sssssqz1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ant-on-a-cube-activity-2-paths-and-expected-values/sssssqz1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ant-on-a-cube-activity-2-paths-and-expected-values/sssssqz1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ant-on-a-cube-activity-2-paths-and-expected-values/sssssqz1"/>
      <lastmod>2026-11-01T20:51:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ant-on-a-cube-activity-2-paths-and-expected-values/sssssqz1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ant-on-a-cube-activity-2-paths-and-expected-values/sssssqz1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ant-on-a-cube-activity-2-paths-and-expected-values/sssssqz1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ant-on-a-cube-activity-2-paths-and-expected-values/sssssqz1"/>
      <lastmod>2026-11-01T20:51:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demo-of-arithmetic-sum-and-geometric-shapes/sssssqzm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-arithmetic-sum-and-geometric-shapes/sssssqzm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-arithmetic-sum-and-geometric-shapes/sssssqzm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-arithmetic-sum-and-geometric-shapes/sssssqzm"/>
      <lastmod>2026-11-01T22:10:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demo-of-arithmetic-sum-and-geometric-shapes/sssssqzm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-arithmetic-sum-and-geometric-shapes/sssssqzm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-arithmetic-sum-and-geometric-shapes/sssssqzm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-arithmetic-sum-and-geometric-shapes/sssssqzm"/>
      <lastmod>2026-11-01T22:10:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-functions-calculus-demo/sssssqzj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-calculus-demo/sssssqzj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-calculus-demo/sssssqzj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-calculus-demo/sssssqzj"/>
      <lastmod>2026-11-02T17:45:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-functions-calculus-demo/sssssqzj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-calculus-demo/sssssqzj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-calculus-demo/sssssqzj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-calculus-demo/sssssqzj"/>
      <lastmod>2026-11-02T17:45:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-roots-of-quadratic-with-compass-and-ruler/sssssqzp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-roots-of-quadratic-with-compass-and-ruler/sssssqzp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-roots-of-quadratic-with-compass-and-ruler/sssssqzp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-roots-of-quadratic-with-compass-and-ruler/sssssqzp"/>
      <lastmod>2026-11-02T00:14:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-roots-of-quadratic-with-compass-and-ruler/sssssqzp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-roots-of-quadratic-with-compass-and-ruler/sssssqzp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-roots-of-quadratic-with-compass-and-ruler/sssssqzp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-roots-of-quadratic-with-compass-and-ruler/sssssqzp"/>
      <lastmod>2026-11-02T00:14:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/box-plot-samples-of-20/sssssqzw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-plot-samples-of-20/sssssqzw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-plot-samples-of-20/sssssqzw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-plot-samples-of-20/sssssqzw"/>
      <lastmod>2026-11-02T18:21:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/box-plot-samples-of-20/sssssqzw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-plot-samples-of-20/sssssqzw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-plot-samples-of-20/sssssqzw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-plot-samples-of-20/sssssqzw"/>
      <lastmod>2026-11-02T18:21:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inner-parallelogram-animation/sssssqz6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inner-parallelogram-animation/sssssqz6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inner-parallelogram-animation/sssssqz6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inner-parallelogram-animation/sssssqz6"/>
      <lastmod>2026-11-01T21:30:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inner-parallelogram-animation/sssssqz6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inner-parallelogram-animation/sssssqz6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inner-parallelogram-animation/sssssqz6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inner-parallelogram-animation/sssssqz6"/>
      <lastmod>2026-11-01T21:30:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagon-construction-example/sssssqzg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-construction-example/sssssqzg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-construction-example/sssssqzg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-construction-example/sssssqzg"/>
      <lastmod>2026-11-01T19:10:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagon-construction-example/sssssqzg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-construction-example/sssssqzg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-construction-example/sssssqzg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-construction-example/sssssqzg"/>
      <lastmod>2026-11-01T19:10:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/david-star-slided-geometric-demo/sssssqz9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/david-star-slided-geometric-demo/sssssqz9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/david-star-slided-geometric-demo/sssssqz9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/david-star-slided-geometric-demo/sssssqz9"/>
      <lastmod>2026-11-01T22:05:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/david-star-slided-geometric-demo/sssssqz9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/david-star-slided-geometric-demo/sssssqz9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/david-star-slided-geometric-demo/sssssqz9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/david-star-slided-geometric-demo/sssssqz9"/>
      <lastmod>2026-11-01T22:05:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/uniqueness-of-limits-theorem-and-proof/sssssqze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/uniqueness-of-limits-theorem-and-proof/sssssqze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/uniqueness-of-limits-theorem-and-proof/sssssqze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/uniqueness-of-limits-theorem-and-proof/sssssqze"/>
      <lastmod>2026-11-02T17:51:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/uniqueness-of-limits-theorem-and-proof/sssssqze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/uniqueness-of-limits-theorem-and-proof/sssssqze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/uniqueness-of-limits-theorem-and-proof/sssssqze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/uniqueness-of-limits-theorem-and-proof/sssssqze"/>
      <lastmod>2026-11-02T17:51:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pmm/sssssqzv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pmm/sssssqzv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallpaper-symmetry-group-pmm/sssssqzv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pmm/sssssqzv"/>
      <lastmod>2026-11-02T09:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wallpaper-symmetry-group-pmm/sssssqzv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pmm/sssssqzv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallpaper-symmetry-group-pmm/sssssqzv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pmm/sssssqzv"/>
      <lastmod>2026-11-02T09:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-normal-distribution-animation/sssssqz4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-normal-distribution-animation/sssssqz4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-normal-distribution-animation/sssssqz4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-normal-distribution-animation/sssssqz4"/>
      <lastmod>2026-11-02T16:42:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-normal-distribution-animation/sssssqz4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-normal-distribution-animation/sssssqz4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-normal-distribution-animation/sssssqz4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-normal-distribution-animation/sssssqz4"/>
      <lastmod>2026-11-02T16:42:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-geometric-patterns-demo/sssssqzl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-demo/sssssqzl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-patterns-demo/sssssqzl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-demo/sssssqzl"/>
      <lastmod>2026-11-02T02:17:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-geometric-patterns-demo/sssssqzl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-demo/sssssqzl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-patterns-demo/sssssqzl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-demo/sssssqzl"/>
      <lastmod>2026-11-02T02:17:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-and-function-graph/sssssqzy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-function-graph/sssssqzy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-function-graph/sssssqzy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-function-graph/sssssqzy"/>
      <lastmod>2026-11-02T17:53:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-and-function-graph/sssssqzy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-function-graph/sssssqzy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-function-graph/sssssqzy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-function-graph/sssssqzy"/>
      <lastmod>2026-11-02T17:53:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-by-judith-coelho/sssssqza</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-by-judith-coelho/sssssqza"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-by-judith-coelho/sssssqza"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-by-judith-coelho/sssssqza"/>
      <lastmod>2026-11-02T03:00:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-by-judith-coelho/sssssqza</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-by-judith-coelho/sssssqza"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-by-judith-coelho/sssssqza"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-by-judith-coelho/sssssqza"/>
      <lastmod>2026-11-02T03:00:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-function-relationships-by-frikkie81/sssssqzc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-function-relationships-by-frikkie81/sssssqzc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-function-relationships-by-frikkie81/sssssqzc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-function-relationships-by-frikkie81/sssssqzc"/>
      <lastmod>2026-11-01T23:28:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-function-relationships-by-frikkie81/sssssqzc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-function-relationships-by-frikkie81/sssssqzc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-function-relationships-by-frikkie81/sssssqzc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-function-relationships-by-frikkie81/sssssqzc"/>
      <lastmod>2026-11-01T23:28:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-terry-gastauer/sssssqzr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-terry-gastauer/sssssqzr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-terry-gastauer/sssssqzr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-terry-gastauer/sssssqzr"/>
      <lastmod>2026-11-02T12:08:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-terry-gastauer/sssssqzr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-terry-gastauer/sssssqzr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-terry-gastauer/sssssqzr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-terry-gastauer/sssssqzr"/>
      <lastmod>2026-11-02T12:08:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-surface-area-of-a-cuboid/sssssqzh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-surface-area-of-a-cuboid/sssssqzh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-surface-area-of-a-cuboid/sssssqzh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-surface-area-of-a-cuboid/sssssqzh"/>
      <lastmod>2026-11-01T21:10:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-surface-area-of-a-cuboid/sssssqzh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-surface-area-of-a-cuboid/sssssqzh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-surface-area-of-a-cuboid/sssssqzh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-surface-area-of-a-cuboid/sssssqzh"/>
      <lastmod>2026-11-01T21:10:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-interior-angles/sssssqzt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-interior-angles/sssssqzt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-interior-angles/sssssqzt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-interior-angles/sssssqzt"/>
      <lastmod>2026-11-02T16:49:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-interior-angles/sssssqzt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-interior-angles/sssssqzt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-interior-angles/sssssqzt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-interior-angles/sssssqzt"/>
      <lastmod>2026-11-02T16:49:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/space-curves-velocity-and-acceleration/sssssqzx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-curves-velocity-and-acceleration/sssssqzx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-curves-velocity-and-acceleration/sssssqzx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-curves-velocity-and-acceleration/sssssqzx"/>
      <lastmod>2026-11-01T21:41:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/space-curves-velocity-and-acceleration/sssssqzx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-curves-velocity-and-acceleration/sssssqzx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-curves-velocity-and-acceleration/sssssqzx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-curves-velocity-and-acceleration/sssssqzx"/>
      <lastmod>2026-11-01T21:41:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tau-ceti-pentagon/sssssqzi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tau-ceti-pentagon/sssssqzi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tau-ceti-pentagon/sssssqzi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tau-ceti-pentagon/sssssqzi"/>
      <lastmod>2026-11-01T19:26:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tau-ceti-pentagon/sssssqzi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tau-ceti-pentagon/sssssqzi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tau-ceti-pentagon/sssssqzi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tau-ceti-pentagon/sssssqzi"/>
      <lastmod>2026-11-01T19:26:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-in-a-line-you-do-it/sssssqzo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-a-line-you-do-it/sssssqzo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-a-line-you-do-it/sssssqzo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-a-line-you-do-it/sssssqzo"/>
      <lastmod>2026-11-02T17:44:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-in-a-line-you-do-it/sssssqzo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-a-line-you-do-it/sssssqzo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-a-line-you-do-it/sssssqzo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-a-line-you-do-it/sssssqzo"/>
      <lastmod>2026-11-02T17:44:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logistic-growth-model-interactive-demo/sssssq0s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logistic-growth-model-interactive-demo/sssssq0s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logistic-growth-model-interactive-demo/sssssq0s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logistic-growth-model-interactive-demo/sssssq0s"/>
      <lastmod>2026-11-01T21:06:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logistic-growth-model-interactive-demo/sssssq0s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logistic-growth-model-interactive-demo/sssssq0s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logistic-growth-model-interactive-demo/sssssq0s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logistic-growth-model-interactive-demo/sssssq0s"/>
      <lastmod>2026-11-01T21:06:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lissajous-fly-and-the-cat/sssssq07</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lissajous-fly-and-the-cat/sssssq07"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lissajous-fly-and-the-cat/sssssq07"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lissajous-fly-and-the-cat/sssssq07"/>
      <lastmod>2026-11-01T21:01:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lissajous-fly-and-the-cat/sssssq07</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lissajous-fly-and-the-cat/sssssq07"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lissajous-fly-and-the-cat/sssssq07"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lissajous-fly-and-the-cat/sssssq07"/>
      <lastmod>2026-11-01T21:01:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/restricting-function-domain/sssssq0n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/restricting-function-domain/sssssq0n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/restricting-function-domain/sssssq0n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/restricting-function-domain/sssssq0n"/>
      <lastmod>2026-11-01T23:40:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/restricting-function-domain/sssssq0n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/restricting-function-domain/sssssq0n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/restricting-function-domain/sssssq0n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/restricting-function-domain/sssssq0n"/>
      <lastmod>2026-11-01T23:40:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-chords/sssssq02</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-chords/sssssq02"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-chords/sssssq02"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-chords/sssssq02"/>
      <lastmod>2026-11-02T09:30:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-chords/sssssq02</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-chords/sssssq02"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-chords/sssssq02"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-chords/sssssq02"/>
      <lastmod>2026-11-02T09:30:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/collapsing-rectangle/sssssq0k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collapsing-rectangle/sssssq0k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collapsing-rectangle/sssssq0k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collapsing-rectangle/sssssq0k"/>
      <lastmod>2026-11-02T02:52:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/collapsing-rectangle/sssssq0k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collapsing-rectangle/sssssq0k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collapsing-rectangle/sssssq0k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collapsing-rectangle/sssssq0k"/>
      <lastmod>2026-11-02T02:52:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-by-tpettifor/sssssq0z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-tpettifor/sssssq0z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-tpettifor/sssssq0z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-tpettifor/sssssq0z"/>
      <lastmod>2026-11-02T15:08:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-by-tpettifor/sssssq0z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-tpettifor/sssssq0z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-tpettifor/sssssq0z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-tpettifor/sssssq0z"/>
      <lastmod>2026-11-02T15:08:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-series-demonstration-1/sssssq00</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-series-demonstration-1/sssssq00"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-series-demonstration-1/sssssq00"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-series-demonstration-1/sssssq00"/>
      <lastmod>2026-11-02T17:10:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-series-demonstration-1/sssssq00</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-series-demonstration-1/sssssq00"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-series-demonstration-1/sssssq00"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-series-demonstration-1/sssssq00"/>
      <lastmod>2026-11-02T17:10:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tracing-cosine-ratio-in-a-unit-circle/sssssq0d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tracing-cosine-ratio-in-a-unit-circle/sssssq0d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tracing-cosine-ratio-in-a-unit-circle/sssssq0d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tracing-cosine-ratio-in-a-unit-circle/sssssq0d"/>
      <lastmod>2026-11-02T18:09:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tracing-cosine-ratio-in-a-unit-circle/sssssq0d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tracing-cosine-ratio-in-a-unit-circle/sssssq0d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tracing-cosine-ratio-in-a-unit-circle/sssssq0d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tracing-cosine-ratio-in-a-unit-circle/sssssq0d"/>
      <lastmod>2026-11-02T18:09:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-congruence-theorem-dynamic-proof/sssssq0f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-theorem-dynamic-proof/sssssq0f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-theorem-dynamic-proof/sssssq0f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-theorem-dynamic-proof/sssssq0f"/>
      <lastmod>2026-11-01T21:43:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-congruence-theorem-dynamic-proof/sssssq0f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-theorem-dynamic-proof/sssssq0f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-theorem-dynamic-proof/sssssq0f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-theorem-dynamic-proof/sssssq0f"/>
      <lastmod>2026-11-01T21:43:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-system-example-ex-1-3-4/sssssq08</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-system-example-ex-1-3-4/sssssq08"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-system-example-ex-1-3-4/sssssq08"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-system-example-ex-1-3-4/sssssq08"/>
      <lastmod>2026-11-01T19:27:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-system-example-ex-1-3-4/sssssq08</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-system-example-ex-1-3-4/sssssq08"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-system-example-ex-1-3-4/sssssq08"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-system-example-ex-1-3-4/sssssq08"/>
      <lastmod>2026-11-01T19:27:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/central-angles-of-polygon/sssssq0u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-angles-of-polygon/sssssq0u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-angles-of-polygon/sssssq0u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-angles-of-polygon/sssssq0u"/>
      <lastmod>2026-11-01T23:12:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/central-angles-of-polygon/sssssq0u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-angles-of-polygon/sssssq0u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-angles-of-polygon/sssssq0u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-angles-of-polygon/sssssq0u"/>
      <lastmod>2026-11-01T23:12:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-squares-inside-circle/sssssq05</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-squares-inside-circle/sssssq05"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-squares-inside-circle/sssssq05"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-squares-inside-circle/sssssq05"/>
      <lastmod>2026-11-01T21:32:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-squares-inside-circle/sssssq05</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-squares-inside-circle/sssssq05"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-squares-inside-circle/sssssq05"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-squares-inside-circle/sssssq05"/>
      <lastmod>2026-11-01T21:32:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-definition-of-the-derivative/sssssq0b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-definition-of-the-derivative/sssssq0b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-definition-of-the-derivative/sssssq0b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-definition-of-the-derivative/sssssq0b"/>
      <lastmod>2026-11-01T21:44:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-definition-of-the-derivative/sssssq0b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-definition-of-the-derivative/sssssq0b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-definition-of-the-derivative/sssssq0b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-definition-of-the-derivative/sssssq0b"/>
      <lastmod>2026-11-01T21:44:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-and-geometric-construction/sssssq03</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-and-geometric-construction/sssssq03"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-and-geometric-construction/sssssq03"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-and-geometric-construction/sssssq03"/>
      <lastmod>2026-11-02T18:53:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-and-geometric-construction/sssssq03</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-and-geometric-construction/sssssq03"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-and-geometric-construction/sssssq03"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-and-geometric-construction/sssssq03"/>
      <lastmod>2026-11-02T18:53:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cumulative-frequency-vs-histogram-vs-box-plot/sssssq0q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cumulative-frequency-vs-histogram-vs-box-plot/sssssq0q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cumulative-frequency-vs-histogram-vs-box-plot/sssssq0q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cumulative-frequency-vs-histogram-vs-box-plot/sssssq0q"/>
      <lastmod>2026-11-02T17:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cumulative-frequency-vs-histogram-vs-box-plot/sssssq0q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cumulative-frequency-vs-histogram-vs-box-plot/sssssq0q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cumulative-frequency-vs-histogram-vs-box-plot/sssssq0q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cumulative-frequency-vs-histogram-vs-box-plot/sssssq0q"/>
      <lastmod>2026-11-02T17:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/incircle-of-hexagon/sssssq01</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-of-hexagon/sssssq01"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-of-hexagon/sssssq01"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-of-hexagon/sssssq01"/>
      <lastmod>2026-11-02T02:31:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/incircle-of-hexagon/sssssq01</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-of-hexagon/sssssq01"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-of-hexagon/sssssq01"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-of-hexagon/sssssq01"/>
      <lastmod>2026-11-02T02:31:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-esther-gruenhut/sssssq0m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-esther-gruenhut/sssssq0m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-demonstration-by-esther-gruenhut/sssssq0m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-esther-gruenhut/sssssq0m"/>
      <lastmod>2026-11-01T19:32:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-mean-demonstration-by-esther-gruenhut/sssssq0m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-esther-gruenhut/sssssq0m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-demonstration-by-esther-gruenhut/sssssq0m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-esther-gruenhut/sssssq0m"/>
      <lastmod>2026-11-01T19:32:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-right-triangular-prism/sssssq0j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-right-triangular-prism/sssssq0j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-right-triangular-prism/sssssq0j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-right-triangular-prism/sssssq0j"/>
      <lastmod>2026-11-02T18:17:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-right-triangular-prism/sssssq0j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-right-triangular-prism/sssssq0j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-right-triangular-prism/sssssq0j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-right-triangular-prism/sssssq0j"/>
      <lastmod>2026-11-02T18:17:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/composing-transformations-line-reflections-and-rotation/sssssq0p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composing-transformations-line-reflections-and-rotation/sssssq0p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composing-transformations-line-reflections-and-rotation/sssssq0p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composing-transformations-line-reflections-and-rotation/sssssq0p"/>
      <lastmod>2026-11-01T19:06:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/composing-transformations-line-reflections-and-rotation/sssssq0p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composing-transformations-line-reflections-and-rotation/sssssq0p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composing-transformations-line-reflections-and-rotation/sssssq0p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composing-transformations-line-reflections-and-rotation/sssssq0p"/>
      <lastmod>2026-11-01T19:06:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-by-tan-seng-kwang/sssssq0w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-tan-seng-kwang/sssssq0w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-tan-seng-kwang/sssssq0w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-tan-seng-kwang/sssssq0w"/>
      <lastmod>2026-11-01T19:26:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-by-tan-seng-kwang/sssssq0w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-tan-seng-kwang/sssssq0w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-tan-seng-kwang/sssssq0w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-tan-seng-kwang/sssssq0w"/>
      <lastmod>2026-11-01T19:26:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-on-whole-numbers-for-grade-9/sssssq06</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-on-whole-numbers-for-grade-9/sssssq06"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-on-whole-numbers-for-grade-9/sssssq06"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-on-whole-numbers-for-grade-9/sssssq06"/>
      <lastmod>2026-11-02T00:08:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-on-whole-numbers-for-grade-9/sssssq06</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-on-whole-numbers-for-grade-9/sssssq06"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-on-whole-numbers-for-grade-9/sssssq06"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-on-whole-numbers-for-grade-9/sssssq06"/>
      <lastmod>2026-11-02T00:08:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-square-of-an-equilateral-triangle/sssssq0g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-square-of-an-equilateral-triangle/sssssq0g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-square-of-an-equilateral-triangle/sssssq0g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-square-of-an-equilateral-triangle/sssssq0g"/>
      <lastmod>2026-11-02T18:40:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-square-of-an-equilateral-triangle/sssssq0g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-square-of-an-equilateral-triangle/sssssq0g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-square-of-an-equilateral-triangle/sssssq0g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-square-of-an-equilateral-triangle/sssssq0g"/>
      <lastmod>2026-11-02T18:40:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-addition-demo/sssssq09</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-addition-demo/sssssq09"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-addition-demo/sssssq09"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-addition-demo/sssssq09"/>
      <lastmod>2026-11-01T19:19:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-addition-demo/sssssq09</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-addition-demo/sssssq09"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-addition-demo/sssssq09"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-addition-demo/sssssq09"/>
      <lastmod>2026-11-01T19:19:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-adding-numbers-level-4/sssssq0e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-adding-numbers-level-4/sssssq0e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-adding-numbers-level-4/sssssq0e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-adding-numbers-level-4/sssssq0e"/>
      <lastmod>2026-11-02T09:08:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-adding-numbers-level-4/sssssq0e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-adding-numbers-level-4/sssssq0e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-adding-numbers-level-4/sssssq0e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-adding-numbers-level-4/sssssq0e"/>
      <lastmod>2026-11-02T09:08:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spheres-3d-constructing-and-exploring-a-sphere-in-space/sssssq0v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheres-3d-constructing-and-exploring-a-sphere-in-space/sssssq0v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheres-3d-constructing-and-exploring-a-sphere-in-space/sssssq0v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheres-3d-constructing-and-exploring-a-sphere-in-space/sssssq0v"/>
      <lastmod>2026-11-02T18:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spheres-3d-constructing-and-exploring-a-sphere-in-space/sssssq0v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheres-3d-constructing-and-exploring-a-sphere-in-space/sssssq0v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheres-3d-constructing-and-exploring-a-sphere-in-space/sssssq0v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheres-3d-constructing-and-exploring-a-sphere-in-space/sssssq0v"/>
      <lastmod>2026-11-02T18:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sector-to-cone-problem-generator/sssssq04</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sector-to-cone-problem-generator/sssssq04"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sector-to-cone-problem-generator/sssssq04"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sector-to-cone-problem-generator/sssssq04"/>
      <lastmod>2026-11-02T18:02:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sector-to-cone-problem-generator/sssssq04</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sector-to-cone-problem-generator/sssssq04"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sector-to-cone-problem-generator/sssssq04"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sector-to-cone-problem-generator/sssssq04"/>
      <lastmod>2026-11-02T18:02:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-conics-on-a-cylinder/sssssq0l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-conics-on-a-cylinder/sssssq0l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-conics-on-a-cylinder/sssssq0l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-conics-on-a-cylinder/sssssq0l"/>
      <lastmod>2026-11-02T13:06:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-conics-on-a-cylinder/sssssq0l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-conics-on-a-cylinder/sssssq0l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-conics-on-a-cylinder/sssssq0l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-conics-on-a-cylinder/sssssq0l"/>
      <lastmod>2026-11-02T13:06:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-the-orthocenter-by-27100/sssssq0y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-orthocenter-by-27100/sssssq0y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-orthocenter-by-27100/sssssq0y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-orthocenter-by-27100/sssssq0y"/>
      <lastmod>2026-11-02T14:57:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-the-orthocenter-by-27100/sssssq0y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-orthocenter-by-27100/sssssq0y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-orthocenter-by-27100/sssssq0y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-orthocenter-by-27100/sssssq0y"/>
      <lastmod>2026-11-02T14:57:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-third-arcs/sssssq0a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-third-arcs/sssssq0a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-third-arcs/sssssq0a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-third-arcs/sssssq0a"/>
      <lastmod>2026-11-01T23:11:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-third-arcs/sssssq0a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-third-arcs/sssssq0a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-third-arcs/sssssq0a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-third-arcs/sssssq0a"/>
      <lastmod>2026-11-01T23:11:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-two-foci/sssssq0c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-two-foci/sssssq0c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-two-foci/sssssq0c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-two-foci/sssssq0c"/>
      <lastmod>2026-11-01T19:21:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-two-foci/sssssq0c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-two-foci/sssssq0c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-two-foci/sssssq0c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-two-foci/sssssq0c"/>
      <lastmod>2026-11-01T19:21:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/electric-field-vector-field-of-two-charges/sssssq0r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/electric-field-vector-field-of-two-charges/sssssq0r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/electric-field-vector-field-of-two-charges/sssssq0r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/electric-field-vector-field-of-two-charges/sssssq0r"/>
      <lastmod>2026-11-01T21:58:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/electric-field-vector-field-of-two-charges/sssssq0r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/electric-field-vector-field-of-two-charges/sssssq0r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/electric-field-vector-field-of-two-charges/sssssq0r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/electric-field-vector-field-of-two-charges/sssssq0r"/>
      <lastmod>2026-11-01T21:58:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangents-of-intersection-of-two-cylinders/sssssq0h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangents-of-intersection-of-two-cylinders/sssssq0h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangents-of-intersection-of-two-cylinders/sssssq0h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangents-of-intersection-of-two-cylinders/sssssq0h"/>
      <lastmod>2026-11-02T16:41:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangents-of-intersection-of-two-cylinders/sssssq0h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangents-of-intersection-of-two-cylinders/sssssq0h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangents-of-intersection-of-two-cylinders/sssssq0h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangents-of-intersection-of-two-cylinders/sssssq0h"/>
      <lastmod>2026-11-02T16:41:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/statistical-distributions-visualization/sssssq0t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistical-distributions-visualization/sssssq0t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistical-distributions-visualization/sssssq0t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistical-distributions-visualization/sssssq0t"/>
      <lastmod>2026-11-02T00:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/statistical-distributions-visualization/sssssq0t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistical-distributions-visualization/sssssq0t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistical-distributions-visualization/sssssq0t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistical-distributions-visualization/sssssq0t"/>
      <lastmod>2026-11-02T00:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-example-3-vectors-and-angles/sssssq0x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-example-3-vectors-and-angles/sssssq0x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-example-3-vectors-and-angles/sssssq0x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-example-3-vectors-and-angles/sssssq0x"/>
      <lastmod>2026-11-01T23:41:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-example-3-vectors-and-angles/sssssq0x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-example-3-vectors-and-angles/sssssq0x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-example-3-vectors-and-angles/sssssq0x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-example-3-vectors-and-angles/sssssq0x"/>
      <lastmod>2026-11-01T23:41:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-operations-on-decimals-to-solve-problems/sssssq0i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-operations-on-decimals-to-solve-problems/sssssq0i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-operations-on-decimals-to-solve-problems/sssssq0i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-operations-on-decimals-to-solve-problems/sssssq0i"/>
      <lastmod>2026-11-02T10:37:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-operations-on-decimals-to-solve-problems/sssssq0i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-operations-on-decimals-to-solve-problems/sssssq0i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-operations-on-decimals-to-solve-problems/sssssq0i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-operations-on-decimals-to-solve-problems/sssssq0i"/>
      <lastmod>2026-11-02T10:37:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/clairaut-relation/sssssq0o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clairaut-relation/sssssq0o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clairaut-relation/sssssq0o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clairaut-relation/sssssq0o"/>
      <lastmod>2026-11-02T13:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/clairaut-relation/sssssq0o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clairaut-relation/sssssq0o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clairaut-relation/sssssq0o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clairaut-relation/sssssq0o"/>
      <lastmod>2026-11-02T13:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solar-panel-collecting-sunlight-during-day-by-terry-lee-lindenmuth/sssssqds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solar-panel-collecting-sunlight-during-day-by-terry-lee-lindenmuth/sssssqds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solar-panel-collecting-sunlight-during-day-by-terry-lee-lindenmuth/sssssqds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solar-panel-collecting-sunlight-during-day-by-terry-lee-lindenmuth/sssssqds"/>
      <lastmod>2026-11-02T15:41:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solar-panel-collecting-sunlight-during-day-by-terry-lee-lindenmuth/sssssqds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solar-panel-collecting-sunlight-during-day-by-terry-lee-lindenmuth/sssssqds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solar-panel-collecting-sunlight-during-day-by-terry-lee-lindenmuth/sssssqds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solar-panel-collecting-sunlight-during-day-by-terry-lee-lindenmuth/sssssqds"/>
      <lastmod>2026-11-02T15:41:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-rational-factors-matching-game/sssssqd7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-rational-factors-matching-game/sssssqd7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-rational-factors-matching-game/sssssqd7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-rational-factors-matching-game/sssssqd7"/>
      <lastmod>2026-11-01T21:24:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-rational-factors-matching-game/sssssqd7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-rational-factors-matching-game/sssssqd7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-rational-factors-matching-game/sssssqd7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-rational-factors-matching-game/sssssqd7"/>
      <lastmod>2026-11-01T21:24:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/long-division-demonstration/sssssqdn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/long-division-demonstration/sssssqdn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/long-division-demonstration/sssssqdn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/long-division-demonstration/sssssqdn"/>
      <lastmod>2026-11-02T17:16:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/long-division-demonstration/sssssqdn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/long-division-demonstration/sssssqdn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/long-division-demonstration/sssssqdn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/long-division-demonstration/sssssqdn"/>
      <lastmod>2026-11-02T17:16:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-of-a-cube/sssssqd2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-of-a-cube/sssssqd2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-of-a-cube/sssssqd2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-of-a-cube/sssssqd2"/>
      <lastmod>2026-11-02T18:31:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-of-a-cube/sssssqd2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-of-a-cube/sssssqd2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-of-a-cube/sssssqd2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-of-a-cube/sssssqd2"/>
      <lastmod>2026-11-02T18:31:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bisection-of-tangent-intersection/sssssqdk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisection-of-tangent-intersection/sssssqdk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisection-of-tangent-intersection/sssssqdk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisection-of-tangent-intersection/sssssqdk"/>
      <lastmod>2026-11-02T13:05:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bisection-of-tangent-intersection/sssssqdk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisection-of-tangent-intersection/sssssqdk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisection-of-tangent-intersection/sssssqdk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisection-of-tangent-intersection/sssssqdk"/>
      <lastmod>2026-11-02T13:05:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-surface-area-with-hemispheres-3d-geometry-demo/sssssqdz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-surface-area-with-hemispheres-3d-geometry-demo/sssssqdz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-surface-area-with-hemispheres-3d-geometry-demo/sssssqdz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-surface-area-with-hemispheres-3d-geometry-demo/sssssqdz"/>
      <lastmod>2026-11-02T08:55:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-surface-area-with-hemispheres-3d-geometry-demo/sssssqdz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-surface-area-with-hemispheres-3d-geometry-demo/sssssqdz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-surface-area-with-hemispheres-3d-geometry-demo/sssssqdz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-surface-area-with-hemispheres-3d-geometry-demo/sssssqdz"/>
      <lastmod>2026-11-02T08:55:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spaceship-racing-game-by-ms-muusse/sssssqd0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spaceship-racing-game-by-ms-muusse/sssssqd0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spaceship-racing-game-by-ms-muusse/sssssqd0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spaceship-racing-game-by-ms-muusse/sssssqd0"/>
      <lastmod>2026-11-02T18:32:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spaceship-racing-game-by-ms-muusse/sssssqd0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spaceship-racing-game-by-ms-muusse/sssssqd0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spaceship-racing-game-by-ms-muusse/sssssqd0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spaceship-racing-game-by-ms-muusse/sssssqd0"/>
      <lastmod>2026-11-02T18:32:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-by-rhoerner12/sssssqdd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-rhoerner12/sssssqdd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-rhoerner12/sssssqdd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-rhoerner12/sssssqdd"/>
      <lastmod>2026-11-02T18:01:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-by-rhoerner12/sssssqdd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-rhoerner12/sssssqdd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-rhoerner12/sssssqdd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-rhoerner12/sssssqdd"/>
      <lastmod>2026-11-02T18:01:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bisecting-a-segment/sssssqdf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisecting-a-segment/sssssqdf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisecting-a-segment/sssssqdf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisecting-a-segment/sssssqdf"/>
      <lastmod>2026-11-02T08:49:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bisecting-a-segment/sssssqdf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisecting-a-segment/sssssqdf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisecting-a-segment/sssssqdf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisecting-a-segment/sssssqdf"/>
      <lastmod>2026-11-02T08:49:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-and-graphing-1-variable-inequalities/sssssqd8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-and-graphing-1-variable-inequalities/sssssqd8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-and-graphing-1-variable-inequalities/sssssqd8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-and-graphing-1-variable-inequalities/sssssqd8"/>
      <lastmod>2026-11-02T18:59:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-and-graphing-1-variable-inequalities/sssssqd8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-and-graphing-1-variable-inequalities/sssssqd8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-and-graphing-1-variable-inequalities/sssssqd8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-and-graphing-1-variable-inequalities/sssssqd8"/>
      <lastmod>2026-11-02T18:59:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-and-tangent-vector-construction/sssssqdu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-tangent-vector-construction/sssssqdu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-tangent-vector-construction/sssssqdu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-tangent-vector-construction/sssssqdu"/>
      <lastmod>2026-11-02T18:42:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-and-tangent-vector-construction/sssssqdu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-tangent-vector-construction/sssssqdu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-tangent-vector-construction/sssssqdu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-tangent-vector-construction/sssssqdu"/>
      <lastmod>2026-11-02T18:42:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-points-on-moving-circle/sssssqd5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-points-on-moving-circle/sssssqd5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-points-on-moving-circle/sssssqd5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-points-on-moving-circle/sssssqd5"/>
      <lastmod>2026-11-01T23:14:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-points-on-moving-circle/sssssqd5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-points-on-moving-circle/sssssqd5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-points-on-moving-circle/sssssqd5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-points-on-moving-circle/sssssqd5"/>
      <lastmod>2026-11-01T23:14:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/casey-s-theorem-demonstration/sssssqdb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/casey-s-theorem-demonstration/sssssqdb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/casey-s-theorem-demonstration/sssssqdb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/casey-s-theorem-demonstration/sssssqdb"/>
      <lastmod>2026-11-02T02:19:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/casey-s-theorem-demonstration/sssssqdb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/casey-s-theorem-demonstration/sssssqdb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/casey-s-theorem-demonstration/sssssqdb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/casey-s-theorem-demonstration/sssssqdb"/>
      <lastmod>2026-11-02T02:19:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-joelsperanza/sssssqd3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-joelsperanza/sssssqd3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-demonstration-by-joelsperanza/sssssqd3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-joelsperanza/sssssqd3"/>
      <lastmod>2026-11-02T17:14:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-demonstration-by-joelsperanza/sssssqd3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-joelsperanza/sssssqd3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-demonstration-by-joelsperanza/sssssqd3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-joelsperanza/sssssqd3"/>
      <lastmod>2026-11-02T17:14:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-unwrapping-by-daryl-cox/sssssqdq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-unwrapping-by-daryl-cox/sssssqdq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-unwrapping-by-daryl-cox/sssssqdq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-unwrapping-by-daryl-cox/sssssqdq"/>
      <lastmod>2026-11-02T08:43:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-unwrapping-by-daryl-cox/sssssqdq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-unwrapping-by-daryl-cox/sssssqdq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-unwrapping-by-daryl-cox/sssssqdq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-unwrapping-by-daryl-cox/sssssqdq"/>
      <lastmod>2026-11-02T08:43:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractal-curve-4/sssssqd1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-curve-4/sssssqd1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-curve-4/sssssqd1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-curve-4/sssssqd1"/>
      <lastmod>2026-11-01T21:20:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractal-curve-4/sssssqd1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-curve-4/sssssqd1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-curve-4/sssssqd1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-curve-4/sssssqd1"/>
      <lastmod>2026-11-01T21:20:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planes/sssssqdm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes/sssssqdm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes/sssssqdm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes/sssssqdm"/>
      <lastmod>2026-11-01T19:28:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planes/sssssqdm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes/sssssqdm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes/sssssqdm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes/sssssqdm"/>
      <lastmod>2026-11-01T19:28:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-spiral/sssssqdj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-spiral/sssssqdj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-spiral/sssssqdj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-spiral/sssssqdj"/>
      <lastmod>2026-11-02T18:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-spiral/sssssqdj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-spiral/sssssqdj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-spiral/sssssqdj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-spiral/sssssqdj"/>
      <lastmod>2026-11-02T18:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-multiplication-geometric-demonstration-by-balajothi-t/sssssqdp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-geometric-demonstration-by-balajothi-t/sssssqdp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-geometric-demonstration-by-balajothi-t/sssssqdp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-geometric-demonstration-by-balajothi-t/sssssqdp"/>
      <lastmod>2026-11-02T02:45:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-multiplication-geometric-demonstration-by-balajothi-t/sssssqdp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-geometric-demonstration-by-balajothi-t/sssssqdp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-geometric-demonstration-by-balajothi-t/sssssqdp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-geometric-demonstration-by-balajothi-t/sssssqdp"/>
      <lastmod>2026-11-02T02:45:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hole-10/sssssqdw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-10/sssssqdw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hole-10/sssssqdw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hole-10/sssssqdw"/>
      <lastmod>2026-11-02T16:59:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hole-10/sssssqdw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-10/sssssqdw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hole-10/sssssqdw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hole-10/sssssqdw"/>
      <lastmod>2026-11-02T16:59:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/try-to-graph-the-derivative-function/sssssqd6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/try-to-graph-the-derivative-function/sssssqd6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/try-to-graph-the-derivative-function/sssssqd6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/try-to-graph-the-derivative-function/sssssqd6"/>
      <lastmod>2026-11-02T15:30:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/try-to-graph-the-derivative-function/sssssqd6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/try-to-graph-the-derivative-function/sssssqd6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/try-to-graph-the-derivative-function/sssssqd6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/try-to-graph-the-derivative-function/sssssqd6"/>
      <lastmod>2026-11-02T15:30:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-volume-conjecture-demo/sssssqdg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-conjecture-demo/sssssqdg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-conjecture-demo/sssssqdg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-conjecture-demo/sssssqdg"/>
      <lastmod>2026-11-02T18:30:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-volume-conjecture-demo/sssssqdg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-conjecture-demo/sssssqdg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-conjecture-demo/sssssqdg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-conjecture-demo/sssssqdg"/>
      <lastmod>2026-11-02T18:30:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-formula-demonstration/sssssqd9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-formula-demonstration/sssssqd9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-formula-demonstration/sssssqd9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-formula-demonstration/sssssqd9"/>
      <lastmod>2026-11-02T15:45:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-formula-demonstration/sssssqd9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-formula-demonstration/sssssqd9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-formula-demonstration/sssssqd9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-formula-demonstration/sssssqd9"/>
      <lastmod>2026-11-02T15:45:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/non-square-rhombus-constructing-a-rhombus-with-circles-and-segments/sssssqde</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-square-rhombus-constructing-a-rhombus-with-circles-and-segments/sssssqde"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-square-rhombus-constructing-a-rhombus-with-circles-and-segments/sssssqde"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-square-rhombus-constructing-a-rhombus-with-circles-and-segments/sssssqde"/>
      <lastmod>2026-11-02T18:46:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/non-square-rhombus-constructing-a-rhombus-with-circles-and-segments/sssssqde</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-square-rhombus-constructing-a-rhombus-with-circles-and-segments/sssssqde"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-square-rhombus-constructing-a-rhombus-with-circles-and-segments/sssssqde"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-square-rhombus-constructing-a-rhombus-with-circles-and-segments/sssssqde"/>
      <lastmod>2026-11-02T18:46:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/klein-bottle-with-unit-normal-vectors/sssssqdv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/klein-bottle-with-unit-normal-vectors/sssssqdv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/klein-bottle-with-unit-normal-vectors/sssssqdv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/klein-bottle-with-unit-normal-vectors/sssssqdv"/>
      <lastmod>2026-11-02T08:28:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/klein-bottle-with-unit-normal-vectors/sssssqdv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/klein-bottle-with-unit-normal-vectors/sssssqdv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/klein-bottle-with-unit-normal-vectors/sssssqdv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/klein-bottle-with-unit-normal-vectors/sssssqdv"/>
      <lastmod>2026-11-02T08:28:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-incredible-shrinking-cube/sssssqd4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-incredible-shrinking-cube/sssssqd4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-incredible-shrinking-cube/sssssqd4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-incredible-shrinking-cube/sssssqd4"/>
      <lastmod>2026-11-02T18:51:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-incredible-shrinking-cube/sssssqd4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-incredible-shrinking-cube/sssssqd4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-incredible-shrinking-cube/sssssqd4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-incredible-shrinking-cube/sssssqd4"/>
      <lastmod>2026-11-02T18:51:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-triangle-area-change-apex-height-base/sssssqdl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-triangle-area-change-apex-height-base/sssssqdl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-triangle-area-change-apex-height-base/sssssqdl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-triangle-area-change-apex-height-base/sssssqdl"/>
      <lastmod>2026-11-02T02:34:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-triangle-area-change-apex-height-base/sssssqdl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-triangle-area-change-apex-height-base/sssssqdl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-triangle-area-change-apex-height-base/sssssqdl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-triangle-area-change-apex-height-base/sssssqdl"/>
      <lastmod>2026-11-02T02:34:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pegasus-geometric-model-demonstration/sssssqdy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pegasus-geometric-model-demonstration/sssssqdy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pegasus-geometric-model-demonstration/sssssqdy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pegasus-geometric-model-demonstration/sssssqdy"/>
      <lastmod>2026-11-01T19:24:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pegasus-geometric-model-demonstration/sssssqdy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pegasus-geometric-model-demonstration/sssssqdy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pegasus-geometric-model-demonstration/sssssqdy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pegasus-geometric-model-demonstration/sssssqdy"/>
      <lastmod>2026-11-01T19:24:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-relationship-between-triangle-s-altitudes-circumcircle-and-tangent/sssssqda</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-between-triangle-s-altitudes-circumcircle-and-tangent/sssssqda"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-between-triangle-s-altitudes-circumcircle-and-tangent/sssssqda"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-between-triangle-s-altitudes-circumcircle-and-tangent/sssssqda"/>
      <lastmod>2026-11-02T18:10:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-relationship-between-triangle-s-altitudes-circumcircle-and-tangent/sssssqda</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-between-triangle-s-altitudes-circumcircle-and-tangent/sssssqda"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-between-triangle-s-altitudes-circumcircle-and-tangent/sssssqda"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-between-triangle-s-altitudes-circumcircle-and-tangent/sssssqda"/>
      <lastmod>2026-11-02T18:10:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interpreting-correlation-the-effect-of-rescaling/sssssqdc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interpreting-correlation-the-effect-of-rescaling/sssssqdc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interpreting-correlation-the-effect-of-rescaling/sssssqdc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interpreting-correlation-the-effect-of-rescaling/sssssqdc"/>
      <lastmod>2026-11-02T17:12:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interpreting-correlation-the-effect-of-rescaling/sssssqdc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interpreting-correlation-the-effect-of-rescaling/sssssqdc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interpreting-correlation-the-effect-of-rescaling/sssssqdc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interpreting-correlation-the-effect-of-rescaling/sssssqdc"/>
      <lastmod>2026-11-02T17:12:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-quartics-with-parabola-and-circle/sssssqdr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quartics-with-parabola-and-circle/sssssqdr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quartics-with-parabola-and-circle/sssssqdr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quartics-with-parabola-and-circle/sssssqdr"/>
      <lastmod>2026-11-01T20:55:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-quartics-with-parabola-and-circle/sssssqdr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quartics-with-parabola-and-circle/sssssqdr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quartics-with-parabola-and-circle/sssssqdr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quartics-with-parabola-and-circle/sssssqdr"/>
      <lastmod>2026-11-01T20:55:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-vertical-angles-rotation-and-angle-measurement/sssssqdh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-vertical-angles-rotation-and-angle-measurement/sssssqdh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-vertical-angles-rotation-and-angle-measurement/sssssqdh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-vertical-angles-rotation-and-angle-measurement/sssssqdh"/>
      <lastmod>2026-11-02T02:11:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-vertical-angles-rotation-and-angle-measurement/sssssqdh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-vertical-angles-rotation-and-angle-measurement/sssssqdh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-vertical-angles-rotation-and-angle-measurement/sssssqdh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-vertical-angles-rotation-and-angle-measurement/sssssqdh"/>
      <lastmod>2026-11-02T02:11:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-derivative-dynamic-secant-to-tangent/sssssqdt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-derivative-dynamic-secant-to-tangent/sssssqdt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-derivative-dynamic-secant-to-tangent/sssssqdt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-derivative-dynamic-secant-to-tangent/sssssqdt"/>
      <lastmod>2026-11-02T00:58:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-of-derivative-dynamic-secant-to-tangent/sssssqdt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-derivative-dynamic-secant-to-tangent/sssssqdt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-derivative-dynamic-secant-to-tangent/sssssqdt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-derivative-dynamic-secant-to-tangent/sssssqdt"/>
      <lastmod>2026-11-02T00:58:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transform-sine-horizontally-one-transformation-at-a-time/sssssqdx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transform-sine-horizontally-one-transformation-at-a-time/sssssqdx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transform-sine-horizontally-one-transformation-at-a-time/sssssqdx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transform-sine-horizontally-one-transformation-at-a-time/sssssqdx"/>
      <lastmod>2026-11-02T12:08:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transform-sine-horizontally-one-transformation-at-a-time/sssssqdx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transform-sine-horizontally-one-transformation-at-a-time/sssssqdx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transform-sine-horizontally-one-transformation-at-a-time/sssssqdx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transform-sine-horizontally-one-transformation-at-a-time/sssssqdx"/>
      <lastmod>2026-11-02T12:08:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-square-illusion/sssssqdi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-square-illusion/sssssqdi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-square-illusion/sssssqdi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-square-illusion/sssssqdi"/>
      <lastmod>2026-11-01T21:32:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-square-illusion/sssssqdi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-square-illusion/sssssqdi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-square-illusion/sssssqdi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-square-illusion/sssssqdi"/>
      <lastmod>2026-11-01T21:32:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/open-middle-box-plots/sssssqdo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-middle-box-plots/sssssqdo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-middle-box-plots/sssssqdo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-middle-box-plots/sssssqdo"/>
      <lastmod>2026-11-01T19:26:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/open-middle-box-plots/sssssqdo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-middle-box-plots/sssssqdo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-middle-box-plots/sssssqdo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-middle-box-plots/sssssqdo"/>
      <lastmod>2026-11-01T19:26:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-2-5-lesson-two-equations-for-each-relationship/sssssqfs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-2-5-lesson-two-equations-for-each-relationship/sssssqfs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-2-5-lesson-two-equations-for-each-relationship/sssssqfs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-2-5-lesson-two-equations-for-each-relationship/sssssqfs"/>
      <lastmod>2026-11-02T10:38:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-2-5-lesson-two-equations-for-each-relationship/sssssqfs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-2-5-lesson-two-equations-for-each-relationship/sssssqfs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-2-5-lesson-two-equations-for-each-relationship/sssssqfs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-2-5-lesson-two-equations-for-each-relationship/sssssqfs"/>
      <lastmod>2026-11-02T10:38:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubic-spline-functions-with-n-support-points/sssssqf7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-spline-functions-with-n-support-points/sssssqf7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-spline-functions-with-n-support-points/sssssqf7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-spline-functions-with-n-support-points/sssssqf7"/>
      <lastmod>2026-11-01T19:35:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubic-spline-functions-with-n-support-points/sssssqf7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-spline-functions-with-n-support-points/sssssqf7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-spline-functions-with-n-support-points/sssssqf7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-spline-functions-with-n-support-points/sssssqf7"/>
      <lastmod>2026-11-01T19:35:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/what-fraction-is-shaded/sssssqfn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-fraction-is-shaded/sssssqfn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-fraction-is-shaded/sssssqfn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-fraction-is-shaded/sssssqfn"/>
      <lastmod>2026-11-01T23:35:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/what-fraction-is-shaded/sssssqfn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-fraction-is-shaded/sssssqfn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-fraction-is-shaded/sssssqfn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-fraction-is-shaded/sssssqfn"/>
      <lastmod>2026-11-01T23:35:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-activity/sssssqf2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-activity/sssssqf2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-activity/sssssqf2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-activity/sssssqf2"/>
      <lastmod>2026-11-02T02:29:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-activity/sssssqf2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-activity/sssssqf2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-activity/sssssqf2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-activity/sssssqf2"/>
      <lastmod>2026-11-02T02:29:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-triangle-congruence-aaa-condition/sssssqfk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-triangle-congruence-aaa-condition/sssssqfk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-triangle-congruence-aaa-condition/sssssqfk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-triangle-congruence-aaa-condition/sssssqfk"/>
      <lastmod>2026-11-01T21:25:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-triangle-congruence-aaa-condition/sssssqfk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-triangle-congruence-aaa-condition/sssssqfk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-triangle-congruence-aaa-condition/sssssqfk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-triangle-congruence-aaa-condition/sssssqfk"/>
      <lastmod>2026-11-01T21:25:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/representing-fractions-using-length-model/sssssqfz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-fractions-using-length-model/sssssqfz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-fractions-using-length-model/sssssqfz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-fractions-using-length-model/sssssqfz"/>
      <lastmod>2026-11-02T15:04:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/representing-fractions-using-length-model/sssssqfz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-fractions-using-length-model/sssssqfz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-fractions-using-length-model/sssssqfz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-fractions-using-length-model/sssssqfz"/>
      <lastmod>2026-11-02T15:04:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curve-stitching/sssssqf0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching/sssssqf0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching/sssssqf0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching/sssssqf0"/>
      <lastmod>2026-11-01T23:43:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curve-stitching/sssssqf0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching/sssssqf0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching/sssssqf0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching/sssssqf0"/>
      <lastmod>2026-11-01T23:43:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-bisector-construction/sssssqfd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-bisector-construction/sssssqfd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-bisector-construction/sssssqfd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-bisector-construction/sssssqfd"/>
      <lastmod>2026-11-01T21:28:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/segment-bisector-construction/sssssqfd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-bisector-construction/sssssqfd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-bisector-construction/sssssqfd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-bisector-construction/sssssqfd"/>
      <lastmod>2026-11-01T21:28:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/general-reflection-at-an-air-water-interface/sssssqff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-reflection-at-an-air-water-interface/sssssqff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-reflection-at-an-air-water-interface/sssssqff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-reflection-at-an-air-water-interface/sssssqff"/>
      <lastmod>2026-11-02T00:52:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/general-reflection-at-an-air-water-interface/sssssqff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-reflection-at-an-air-water-interface/sssssqff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-reflection-at-an-air-water-interface/sssssqff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-reflection-at-an-air-water-interface/sssssqff"/>
      <lastmod>2026-11-02T00:52:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/percentage-problem-solving-practice/sssssqf8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-problem-solving-practice/sssssqf8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-problem-solving-practice/sssssqf8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-problem-solving-practice/sssssqf8"/>
      <lastmod>2026-11-02T10:37:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/percentage-problem-solving-practice/sssssqf8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-problem-solving-practice/sssssqf8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-problem-solving-practice/sssssqf8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-problem-solving-practice/sssssqf8"/>
      <lastmod>2026-11-02T10:37:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-logo-gol-tv/sssssqfu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-logo-gol-tv/sssssqfu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-logo-gol-tv/sssssqfu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-logo-gol-tv/sssssqfu"/>
      <lastmod>2026-11-02T17:35:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-logo-gol-tv/sssssqfu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-logo-gol-tv/sssssqfu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-logo-gol-tv/sssssqfu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-logo-gol-tv/sssssqfu"/>
      <lastmod>2026-11-02T17:35:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circular-paraboloid-of-revolution-3d-augmented-reality-template/sssssqf5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-paraboloid-of-revolution-3d-augmented-reality-template/sssssqf5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-paraboloid-of-revolution-3d-augmented-reality-template/sssssqf5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-paraboloid-of-revolution-3d-augmented-reality-template/sssssqf5"/>
      <lastmod>2026-11-02T02:24:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circular-paraboloid-of-revolution-3d-augmented-reality-template/sssssqf5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-paraboloid-of-revolution-3d-augmented-reality-template/sssssqf5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-paraboloid-of-revolution-3d-augmented-reality-template/sssssqf5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-paraboloid-of-revolution-3d-augmented-reality-template/sssssqf5"/>
      <lastmod>2026-11-02T02:24:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-inscribed-sphere-in-a-cube/sssssqfb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-inscribed-sphere-in-a-cube/sssssqfb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-inscribed-sphere-in-a-cube/sssssqfb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-inscribed-sphere-in-a-cube/sssssqfb"/>
      <lastmod>2026-11-02T00:09:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-inscribed-sphere-in-a-cube/sssssqfb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-inscribed-sphere-in-a-cube/sssssqfb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-inscribed-sphere-in-a-cube/sssssqfb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-inscribed-sphere-in-a-cube/sssssqfb"/>
      <lastmod>2026-11-02T00:09:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-dissection-demo-by-lingguo-bu/sssssqf3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-dissection-demo-by-lingguo-bu/sssssqf3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-dissection-demo-by-lingguo-bu/sssssqf3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-dissection-demo-by-lingguo-bu/sssssqf3"/>
      <lastmod>2026-11-02T18:15:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-dissection-demo-by-lingguo-bu/sssssqf3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-dissection-demo-by-lingguo-bu/sssssqf3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-dissection-demo-by-lingguo-bu/sssssqf3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-dissection-demo-by-lingguo-bu/sssssqf3"/>
      <lastmod>2026-11-02T18:15:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shoe-surface-sliceform/sssssqfq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shoe-surface-sliceform/sssssqfq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shoe-surface-sliceform/sssssqfq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shoe-surface-sliceform/sssssqfq"/>
      <lastmod>2026-11-02T02:15:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shoe-surface-sliceform/sssssqfq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shoe-surface-sliceform/sssssqfq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shoe-surface-sliceform/sssssqfq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shoe-surface-sliceform/sssssqfq"/>
      <lastmod>2026-11-02T02:15:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-sum-of-triangle-on-a-sphere/sssssqf1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-sum-of-triangle-on-a-sphere/sssssqf1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-sum-of-triangle-on-a-sphere/sssssqf1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-sum-of-triangle-on-a-sphere/sssssqf1"/>
      <lastmod>2026-11-02T02:59:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-sum-of-triangle-on-a-sphere/sssssqf1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-sum-of-triangle-on-a-sphere/sssssqf1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-sum-of-triangle-on-a-sphere/sssssqf1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-sum-of-triangle-on-a-sphere/sssssqf1"/>
      <lastmod>2026-11-02T02:59:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-first-and-second-derivatives-of-a-function/sssssqfm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-first-and-second-derivatives-of-a-function/sssssqfm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-first-and-second-derivatives-of-a-function/sssssqfm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-first-and-second-derivatives-of-a-function/sssssqfm"/>
      <lastmod>2026-11-02T18:23:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-first-and-second-derivatives-of-a-function/sssssqfm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-first-and-second-derivatives-of-a-function/sssssqfm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-first-and-second-derivatives-of-a-function/sssssqfm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-first-and-second-derivatives-of-a-function/sssssqfm"/>
      <lastmod>2026-11-02T18:23:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/all-perpendicular-bisectors/sssssqfj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/all-perpendicular-bisectors/sssssqfj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/all-perpendicular-bisectors/sssssqfj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/all-perpendicular-bisectors/sssssqfj"/>
      <lastmod>2026-11-01T20:41:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/all-perpendicular-bisectors/sssssqfj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/all-perpendicular-bisectors/sssssqfj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/all-perpendicular-bisectors/sssssqfj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/all-perpendicular-bisectors/sssssqfj"/>
      <lastmod>2026-11-01T20:41:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-measurement-and-geometric-construction/sssssqfp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-measurement-and-geometric-construction/sssssqfp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-measurement-and-geometric-construction/sssssqfp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-measurement-and-geometric-construction/sssssqfp"/>
      <lastmod>2026-11-02T12:27:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-measurement-and-geometric-construction/sssssqfp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-measurement-and-geometric-construction/sssssqfp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-measurement-and-geometric-construction/sssssqfp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-measurement-and-geometric-construction/sssssqfp"/>
      <lastmod>2026-11-02T12:27:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-patrick-lane/sssssqfw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-patrick-lane/sssssqfw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-patrick-lane/sssssqfw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-patrick-lane/sssssqfw"/>
      <lastmod>2026-11-02T13:15:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-patrick-lane/sssssqfw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-patrick-lane/sssssqfw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-patrick-lane/sssssqfw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-patrick-lane/sssssqfw"/>
      <lastmod>2026-11-02T13:15:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/what-would-the-first-derivative-look-like/sssssqf6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-would-the-first-derivative-look-like/sssssqf6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-would-the-first-derivative-look-like/sssssqf6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-would-the-first-derivative-look-like/sssssqf6"/>
      <lastmod>2026-11-02T02:36:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/what-would-the-first-derivative-look-like/sssssqf6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-would-the-first-derivative-look-like/sssssqf6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-would-the-first-derivative-look-like/sssssqf6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-would-the-first-derivative-look-like/sssssqf6"/>
      <lastmod>2026-11-02T02:36:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-scaffolded-discovery/sssssqfg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-scaffolded-discovery/sssssqfg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-scaffolded-discovery/sssssqfg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-scaffolded-discovery/sssssqfg"/>
      <lastmod>2026-11-01T23:52:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-scaffolded-discovery/sssssqfg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-scaffolded-discovery/sssssqfg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-scaffolded-discovery/sssssqfg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-scaffolded-discovery/sssssqfg"/>
      <lastmod>2026-11-01T23:52:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-rotational-symmetry-construction/sssssqf9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-rotational-symmetry-construction/sssssqf9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-rotational-symmetry-construction/sssssqf9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-rotational-symmetry-construction/sssssqf9"/>
      <lastmod>2026-11-02T00:09:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-rotational-symmetry-construction/sssssqf9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-rotational-symmetry-construction/sssssqf9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-rotational-symmetry-construction/sssssqf9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-rotational-symmetry-construction/sssssqf9"/>
      <lastmod>2026-11-02T00:09:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-intersecting-circles/sssssqfe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-intersecting-circles/sssssqfe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-intersecting-circles/sssssqfe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-intersecting-circles/sssssqfe"/>
      <lastmod>2026-11-01T23:28:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-intersecting-circles/sssssqfe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-intersecting-circles/sssssqfe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-intersecting-circles/sssssqfe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-intersecting-circles/sssssqfe"/>
      <lastmod>2026-11-01T23:28:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-the-sine-function/sssssqfv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-the-sine-function/sssssqfv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-the-sine-function/sssssqfv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-the-sine-function/sssssqfv"/>
      <lastmod>2026-11-01T19:22:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-the-sine-function/sssssqfv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-the-sine-function/sssssqfv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-the-sine-function/sssssqfv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-the-sine-function/sssssqfv"/>
      <lastmod>2026-11-01T19:22:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/approximations-significant-figures-practice/sssssqf4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximations-significant-figures-practice/sssssqf4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximations-significant-figures-practice/sssssqf4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximations-significant-figures-practice/sssssqf4"/>
      <lastmod>2026-11-01T21:21:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/approximations-significant-figures-practice/sssssqf4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximations-significant-figures-practice/sssssqf4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximations-significant-figures-practice/sssssqf4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximations-significant-figures-practice/sssssqf4"/>
      <lastmod>2026-11-01T21:21:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-line-reflections-by-tim-brzezinski/sssssqfl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-line-reflections-by-tim-brzezinski/sssssqfl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-line-reflections-by-tim-brzezinski/sssssqfl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-line-reflections-by-tim-brzezinski/sssssqfl"/>
      <lastmod>2026-11-01T21:55:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-line-reflections-by-tim-brzezinski/sssssqfl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-line-reflections-by-tim-brzezinski/sssssqfl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-line-reflections-by-tim-brzezinski/sssssqfl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-line-reflections-by-tim-brzezinski/sssssqfl"/>
      <lastmod>2026-11-01T21:55:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conics-as-envelopes-of-straight-lines/sssssqfy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conics-as-envelopes-of-straight-lines/sssssqfy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conics-as-envelopes-of-straight-lines/sssssqfy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conics-as-envelopes-of-straight-lines/sssssqfy"/>
      <lastmod>2026-11-02T17:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conics-as-envelopes-of-straight-lines/sssssqfy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conics-as-envelopes-of-straight-lines/sssssqfy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conics-as-envelopes-of-straight-lines/sssssqfy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conics-as-envelopes-of-straight-lines/sssssqfy"/>
      <lastmod>2026-11-02T17:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-and-median-line/sssssqfa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-and-median-line/sssssqfa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-and-median-line/sssssqfa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-and-median-line/sssssqfa"/>
      <lastmod>2026-11-02T18:50:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-and-median-line/sssssqfa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-and-median-line/sssssqfa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-and-median-line/sssssqfa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-and-median-line/sssssqfa"/>
      <lastmod>2026-11-02T18:50:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-points-on-the-coordinate-plane/sssssqfc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-on-the-coordinate-plane/sssssqfc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-on-the-coordinate-plane/sssssqfc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-on-the-coordinate-plane/sssssqfc"/>
      <lastmod>2026-11-01T23:20:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-points-on-the-coordinate-plane/sssssqfc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-on-the-coordinate-plane/sssssqfc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-on-the-coordinate-plane/sssssqfc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-on-the-coordinate-plane/sssssqfc"/>
      <lastmod>2026-11-01T23:20:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-and-tangent-demo/sssssqfr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-and-tangent-demo/sssssqfr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-and-tangent-demo/sssssqfr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-and-tangent-demo/sssssqfr"/>
      <lastmod>2026-11-02T18:51:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-and-tangent-demo/sssssqfr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-and-tangent-demo/sssssqfr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-and-tangent-demo/sssssqfr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-and-tangent-demo/sssssqfr"/>
      <lastmod>2026-11-02T18:51:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/password-generator-geometric-demo/sssssqfh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/password-generator-geometric-demo/sssssqfh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/password-generator-geometric-demo/sssssqfh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/password-generator-geometric-demo/sssssqfh"/>
      <lastmod>2026-11-01T21:41:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/password-generator-geometric-demo/sssssqfh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/password-generator-geometric-demo/sssssqfh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/password-generator-geometric-demo/sssssqfh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/password-generator-geometric-demo/sssssqfh"/>
      <lastmod>2026-11-01T21:41:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-connection-between-sine-and-cosine/sssssqft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-connection-between-sine-and-cosine/sssssqft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-connection-between-sine-and-cosine/sssssqft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-connection-between-sine-and-cosine/sssssqft"/>
      <lastmod>2026-11-02T06:15:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-connection-between-sine-and-cosine/sssssqft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-connection-between-sine-and-cosine/sssssqft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-connection-between-sine-and-cosine/sssssqft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-connection-between-sine-and-cosine/sssssqft"/>
      <lastmod>2026-11-02T06:15:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-subtraction/sssssqfx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-subtraction/sssssqfx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-subtraction/sssssqfx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-subtraction/sssssqfx"/>
      <lastmod>2026-11-02T12:23:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-subtraction/sssssqfx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-subtraction/sssssqfx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-subtraction/sssssqfx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-subtraction/sssssqfx"/>
      <lastmod>2026-11-02T12:23:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bivariate-normal-distribution-3d-plot/sssssqfi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bivariate-normal-distribution-3d-plot/sssssqfi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bivariate-normal-distribution-3d-plot/sssssqfi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bivariate-normal-distribution-3d-plot/sssssqfi"/>
      <lastmod>2026-11-01T20:53:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bivariate-normal-distribution-3d-plot/sssssqfi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bivariate-normal-distribution-3d-plot/sssssqfi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bivariate-normal-distribution-3d-plot/sssssqfi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bivariate-normal-distribution-3d-plot/sssssqfi"/>
      <lastmod>2026-11-01T20:53:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-strophoid/sssssqfo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-strophoid/sssssqfo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-strophoid/sssssqfo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-strophoid/sssssqfo"/>
      <lastmod>2026-11-02T03:00:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-strophoid/sssssqfo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-strophoid/sssssqfo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-strophoid/sssssqfo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-strophoid/sssssqfo"/>
      <lastmod>2026-11-02T03:00:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-fractal-tree-branches/sssssq8s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-fractal-tree-branches/sssssq8s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-fractal-tree-branches/sssssq8s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-fractal-tree-branches/sssssq8s"/>
      <lastmod>2026-11-01T21:38:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-fractal-tree-branches/sssssq8s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-fractal-tree-branches/sssssq8s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-fractal-tree-branches/sssssq8s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-fractal-tree-branches/sssssq8s"/>
      <lastmod>2026-11-01T21:38:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-volume-and-surface-area-of-triangular-prism/sssssq87</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-volume-and-surface-area-of-triangular-prism/sssssq87"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-volume-and-surface-area-of-triangular-prism/sssssq87"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-volume-and-surface-area-of-triangular-prism/sssssq87"/>
      <lastmod>2026-11-01T20:46:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-volume-and-surface-area-of-triangular-prism/sssssq87</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-volume-and-surface-area-of-triangular-prism/sssssq87"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-volume-and-surface-area-of-triangular-prism/sssssq87"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-volume-and-surface-area-of-triangular-prism/sssssq87"/>
      <lastmod>2026-11-01T20:46:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sequence-practice-sssssv52/sssssq8n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-practice-sssssv52/sssssq8n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-practice-sssssv52/sssssq8n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-practice-sssssv52/sssssq8n"/>
      <lastmod>2026-11-01T20:45:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sequence-practice-sssssv52/sssssq8n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-practice-sssssv52/sssssq8n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-practice-sssssv52/sssssq8n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-practice-sssssv52/sssssq8n"/>
      <lastmod>2026-11-01T20:45:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/space-filling-curve/sssssq82</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-filling-curve/sssssq82"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-filling-curve/sssssq82"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-filling-curve/sssssq82"/>
      <lastmod>2026-11-02T17:36:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/space-filling-curve/sssssq82</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-filling-curve/sssssq82"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-filling-curve/sssssq82"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-filling-curve/sssssq82"/>
      <lastmod>2026-11-02T17:36:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-a-hexagon/sssssq8k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-a-hexagon/sssssq8k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-and-exterior-angles-of-a-hexagon/sssssq8k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-a-hexagon/sssssq8k"/>
      <lastmod>2026-11-02T15:14:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interior-and-exterior-angles-of-a-hexagon/sssssq8k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-a-hexagon/sssssq8k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-and-exterior-angles-of-a-hexagon/sssssq8k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-a-hexagon/sssssq8k"/>
      <lastmod>2026-11-02T15:14:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones-2/sssssq8z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones-2/sssssq8z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exploration-by-barbara-e-jones-2/sssssq8z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones-2/sssssq8z"/>
      <lastmod>2026-11-02T02:59:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-exploration-by-barbara-e-jones-2/sssssq8z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones-2/sssssq8z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exploration-by-barbara-e-jones-2/sssssq8z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-barbara-e-jones-2/sssssq8z"/>
      <lastmod>2026-11-02T02:59:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-and-area-calculation-by-cemccourseware/sssssq80</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-and-area-calculation-by-cemccourseware/sssssq80"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-and-area-calculation-by-cemccourseware/sssssq80"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-and-area-calculation-by-cemccourseware/sssssq80"/>
      <lastmod>2026-11-02T00:18:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-and-area-calculation-by-cemccourseware/sssssq80</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-and-area-calculation-by-cemccourseware/sssssq80"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-and-area-calculation-by-cemccourseware/sssssq80"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-and-area-calculation-by-cemccourseware/sssssq80"/>
      <lastmod>2026-11-02T00:18:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-osculating-circle/sssssq8d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-osculating-circle/sssssq8d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-osculating-circle/sssssq8d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-osculating-circle/sssssq8d"/>
      <lastmod>2026-11-01T23:27:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-osculating-circle/sssssq8d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-osculating-circle/sssssq8d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-osculating-circle/sssssq8d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-osculating-circle/sssssq8d"/>
      <lastmod>2026-11-01T23:27:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/verify-trig-sin-cos-of-central-angles/sssssq8f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/verify-trig-sin-cos-of-central-angles/sssssq8f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/verify-trig-sin-cos-of-central-angles/sssssq8f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/verify-trig-sin-cos-of-central-angles/sssssq8f"/>
      <lastmod>2026-11-02T18:02:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/verify-trig-sin-cos-of-central-angles/sssssq8f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/verify-trig-sin-cos-of-central-angles/sssssq8f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/verify-trig-sin-cos-of-central-angles/sssssq8f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/verify-trig-sin-cos-of-central-angles/sssssq8f"/>
      <lastmod>2026-11-02T18:02:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diffusion-phenomenon/sssssq88</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diffusion-phenomenon/sssssq88"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diffusion-phenomenon/sssssq88"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diffusion-phenomenon/sssssq88"/>
      <lastmod>2026-11-02T18:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diffusion-phenomenon/sssssq88</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diffusion-phenomenon/sssssq88"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diffusion-phenomenon/sssssq88"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diffusion-phenomenon/sssssq88"/>
      <lastmod>2026-11-02T18:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-function-parameter-dependence-demo/sssssq8u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-parameter-dependence-demo/sssssq8u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-parameter-dependence-demo/sssssq8u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-parameter-dependence-demo/sssssq8u"/>
      <lastmod>2026-11-01T19:14:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-function-parameter-dependence-demo/sssssq8u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-parameter-dependence-demo/sssssq8u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-parameter-dependence-demo/sssssq8u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-parameter-dependence-demo/sssssq8u"/>
      <lastmod>2026-11-01T19:14:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphs-of-logarithmic-functions-with-different-bases/sssssq85</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-logarithmic-functions-with-different-bases/sssssq85"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-logarithmic-functions-with-different-bases/sssssq85"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-logarithmic-functions-with-different-bases/sssssq85"/>
      <lastmod>2026-11-01T21:36:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphs-of-logarithmic-functions-with-different-bases/sssssq85</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-logarithmic-functions-with-different-bases/sssssq85"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-logarithmic-functions-with-different-bases/sssssq85"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-logarithmic-functions-with-different-bases/sssssq85"/>
      <lastmod>2026-11-01T21:36:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-derivatives-visualization-tangent-planes-and-directional-slopes-on-a-su/sssssq8b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivatives-visualization-tangent-planes-and-directional-slopes-on-a-su/sssssq8b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivatives-visualization-tangent-planes-and-directional-slopes-on-a-su/sssssq8b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivatives-visualization-tangent-planes-and-directional-slopes-on-a-su/sssssq8b"/>
      <lastmod>2026-11-02T02:51:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-derivatives-visualization-tangent-planes-and-directional-slopes-on-a-su/sssssq8b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivatives-visualization-tangent-planes-and-directional-slopes-on-a-su/sssssq8b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivatives-visualization-tangent-planes-and-directional-slopes-on-a-su/sssssq8b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivatives-visualization-tangent-planes-and-directional-slopes-on-a-su/sssssq8b"/>
      <lastmod>2026-11-02T02:51:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-45-22-rotational-sections-and-geometric-construction/sssssq83</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-45-22-rotational-sections-and-geometric-construction/sssssq83"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-45-22-rotational-sections-and-geometric-construction/sssssq83"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-45-22-rotational-sections-and-geometric-construction/sssssq83"/>
      <lastmod>2026-11-01T22:00:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-45-22-rotational-sections-and-geometric-construction/sssssq83</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-45-22-rotational-sections-and-geometric-construction/sssssq83"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-45-22-rotational-sections-and-geometric-construction/sssssq83"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-45-22-rotational-sections-and-geometric-construction/sssssq83"/>
      <lastmod>2026-11-01T22:00:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratios-and-line-segments/sssssq8q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-and-line-segments/sssssq8q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-and-line-segments/sssssq8q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-and-line-segments/sssssq8q"/>
      <lastmod>2026-11-02T18:41:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratios-and-line-segments/sssssq8q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-and-line-segments/sssssq8q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-and-line-segments/sssssq8q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-and-line-segments/sssssq8q"/>
      <lastmod>2026-11-02T18:41:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/life-expectancy-histogram/sssssq81</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/life-expectancy-histogram/sssssq81"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/life-expectancy-histogram/sssssq81"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/life-expectancy-histogram/sssssq81"/>
      <lastmod>2026-11-02T17:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/life-expectancy-histogram/sssssq81</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/life-expectancy-histogram/sssssq81"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/life-expectancy-histogram/sssssq81"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/life-expectancy-histogram/sssssq81"/>
      <lastmod>2026-11-02T17:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-investigation-task/sssssq8m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-investigation-task/sssssq8m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-investigation-task/sssssq8m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-investigation-task/sssssq8m"/>
      <lastmod>2026-11-02T03:12:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-investigation-task/sssssq8m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-investigation-task/sssssq8m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-investigation-task/sssssq8m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-investigation-task/sssssq8m"/>
      <lastmod>2026-11-02T03:12:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-the-cosine-curve-0-360-degrees/sssssq8j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-the-cosine-curve-0-360-degrees/sssssq8j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-the-cosine-curve-0-360-degrees/sssssq8j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-the-cosine-curve-0-360-degrees/sssssq8j"/>
      <lastmod>2026-11-02T12:06:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-the-cosine-curve-0-360-degrees/sssssq8j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-the-cosine-curve-0-360-degrees/sssssq8j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-the-cosine-curve-0-360-degrees/sssssq8j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-the-cosine-curve-0-360-degrees/sssssq8j"/>
      <lastmod>2026-11-02T12:06:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualize-two-note-harmonies-with-lissajous-diagrams/sssssq8p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualize-two-note-harmonies-with-lissajous-diagrams/sssssq8p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualize-two-note-harmonies-with-lissajous-diagrams/sssssq8p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualize-two-note-harmonies-with-lissajous-diagrams/sssssq8p"/>
      <lastmod>2026-11-02T16:35:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualize-two-note-harmonies-with-lissajous-diagrams/sssssq8p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualize-two-note-harmonies-with-lissajous-diagrams/sssssq8p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualize-two-note-harmonies-with-lissajous-diagrams/sssssq8p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualize-two-note-harmonies-with-lissajous-diagrams/sssssq8p"/>
      <lastmod>2026-11-02T16:35:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-using-vector-notation/sssssq8w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-using-vector-notation/sssssq8w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-using-vector-notation/sssssq8w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-using-vector-notation/sssssq8w"/>
      <lastmod>2026-11-01T21:48:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-using-vector-notation/sssssq8w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-using-vector-notation/sssssq8w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-using-vector-notation/sssssq8w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-using-vector-notation/sssssq8w"/>
      <lastmod>2026-11-01T21:48:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/same-correspondence-rules-different-stories-by-step/sssssq86</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-correspondence-rules-different-stories-by-step/sssssq86"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-correspondence-rules-different-stories-by-step/sssssq86"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-correspondence-rules-different-stories-by-step/sssssq86"/>
      <lastmod>2026-11-02T18:00:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/same-correspondence-rules-different-stories-by-step/sssssq86</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-correspondence-rules-different-stories-by-step/sssssq86"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-correspondence-rules-different-stories-by-step/sssssq86"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-correspondence-rules-different-stories-by-step/sssssq86"/>
      <lastmod>2026-11-02T18:00:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-as-parallelogram/sssssq8g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-as-parallelogram/sssssq8g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-as-parallelogram/sssssq8g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-as-parallelogram/sssssq8g"/>
      <lastmod>2026-11-02T16:54:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-as-parallelogram/sssssq8g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-as-parallelogram/sssssq8g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-as-parallelogram/sssssq8g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-as-parallelogram/sssssq8g"/>
      <lastmod>2026-11-02T16:54:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-rotation-exploration/sssssq89</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-rotation-exploration/sssssq89"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-rotation-exploration/sssssq89"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-rotation-exploration/sssssq89"/>
      <lastmod>2026-11-02T18:02:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-rotation-exploration/sssssq89</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-rotation-exploration/sssssq89"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-rotation-exploration/sssssq89"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-rotation-exploration/sssssq89"/>
      <lastmod>2026-11-02T18:02:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-numbers-parabolic-mirror-geometric-transformations/sssssq8e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-numbers-parabolic-mirror-geometric-transformations/sssssq8e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-numbers-parabolic-mirror-geometric-transformations/sssssq8e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-numbers-parabolic-mirror-geometric-transformations/sssssq8e"/>
      <lastmod>2026-11-01T21:57:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-numbers-parabolic-mirror-geometric-transformations/sssssq8e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-numbers-parabolic-mirror-geometric-transformations/sssssq8e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-numbers-parabolic-mirror-geometric-transformations/sssssq8e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-numbers-parabolic-mirror-geometric-transformations/sssssq8e"/>
      <lastmod>2026-11-01T21:57:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/projectile-trajectory/sssssq8v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-trajectory/sssssq8v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-trajectory/sssssq8v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-trajectory/sssssq8v"/>
      <lastmod>2026-11-02T16:46:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/projectile-trajectory/sssssq8v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-trajectory/sssssq8v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-trajectory/sssssq8v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-trajectory/sssssq8v"/>
      <lastmod>2026-11-02T16:46:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-translation-and-perimeter-calculation/sssssq84</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-translation-and-perimeter-calculation/sssssq84"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-translation-and-perimeter-calculation/sssssq84"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-translation-and-perimeter-calculation/sssssq84"/>
      <lastmod>2026-11-01T21:32:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-translation-and-perimeter-calculation/sssssq84</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-translation-and-perimeter-calculation/sssssq84"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-translation-and-perimeter-calculation/sssssq84"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-translation-and-perimeter-calculation/sssssq84"/>
      <lastmod>2026-11-01T21:32:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-cylinder-by-k-goodwin/sssssq8l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-k-goodwin/sssssq8l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cylinder-by-k-goodwin/sssssq8l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-k-goodwin/sssssq8l"/>
      <lastmod>2026-11-02T18:20:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-cylinder-by-k-goodwin/sssssq8l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-k-goodwin/sssssq8l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cylinder-by-k-goodwin/sssssq8l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-k-goodwin/sssssq8l"/>
      <lastmod>2026-11-02T18:20:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-around-point-b/sssssq8y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-around-point-b/sssssq8y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-around-point-b/sssssq8y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-around-point-b/sssssq8y"/>
      <lastmod>2026-11-01T21:54:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-around-point-b/sssssq8y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-around-point-b/sssssq8y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-around-point-b/sssssq8y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-around-point-b/sssssq8y"/>
      <lastmod>2026-11-01T21:54:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-subtraction-1/sssssq8a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-subtraction-1/sssssq8a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-subtraction-1/sssssq8a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-subtraction-1/sssssq8a"/>
      <lastmod>2026-11-02T17:13:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-subtraction-1/sssssq8a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-subtraction-1/sssssq8a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-subtraction-1/sssssq8a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-subtraction-1/sssssq8a"/>
      <lastmod>2026-11-02T17:13:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rgb-to-hsv-color-converter/sssssq8c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rgb-to-hsv-color-converter/sssssq8c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rgb-to-hsv-color-converter/sssssq8c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rgb-to-hsv-color-converter/sssssq8c"/>
      <lastmod>2026-11-02T12:21:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rgb-to-hsv-color-converter/sssssq8c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rgb-to-hsv-color-converter/sssssq8c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rgb-to-hsv-color-converter/sssssq8c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rgb-to-hsv-color-converter/sssssq8c"/>
      <lastmod>2026-11-02T12:21:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-transformations-graph-transformations/sssssq8r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-transformations-graph-transformations/sssssq8r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-transformations-graph-transformations/sssssq8r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-transformations-graph-transformations/sssssq8r"/>
      <lastmod>2026-11-02T00:31:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-transformations-graph-transformations/sssssq8r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-transformations-graph-transformations/sssssq8r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-transformations-graph-transformations/sssssq8r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-transformations-graph-transformations/sssssq8r"/>
      <lastmod>2026-11-02T00:31:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-complex-numbers/sssssq8h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-complex-numbers/sssssq8h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-complex-numbers/sssssq8h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-complex-numbers/sssssq8h"/>
      <lastmod>2026-11-02T17:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-complex-numbers/sssssq8h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-complex-numbers/sssssq8h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-complex-numbers/sssssq8h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-complex-numbers/sssssq8h"/>
      <lastmod>2026-11-02T17:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-shapes-using-coordinates/sssssq8t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-shapes-using-coordinates/sssssq8t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-shapes-using-coordinates/sssssq8t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-shapes-using-coordinates/sssssq8t"/>
      <lastmod>2026-11-02T06:43:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-shapes-using-coordinates/sssssq8t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-shapes-using-coordinates/sssssq8t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-shapes-using-coordinates/sssssq8t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-shapes-using-coordinates/sssssq8t"/>
      <lastmod>2026-11-02T06:43:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/g-gco-7-sas-exercise-2/sssssq8x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/g-gco-7-sas-exercise-2/sssssq8x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/g-gco-7-sas-exercise-2/sssssq8x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/g-gco-7-sas-exercise-2/sssssq8x"/>
      <lastmod>2026-11-01T21:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/g-gco-7-sas-exercise-2/sssssq8x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/g-gco-7-sas-exercise-2/sssssq8x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/g-gco-7-sas-exercise-2/sssssq8x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/g-gco-7-sas-exercise-2/sssssq8x"/>
      <lastmod>2026-11-01T21:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-rotational-activity-with-spline/sssssq8i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-rotational-activity-with-spline/sssssq8i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-rotational-activity-with-spline/sssssq8i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-rotational-activity-with-spline/sssssq8i"/>
      <lastmod>2026-11-02T02:58:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-rotational-activity-with-spline/sssssq8i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-rotational-activity-with-spline/sssssq8i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-rotational-activity-with-spline/sssssq8i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-rotational-activity-with-spline/sssssq8i"/>
      <lastmod>2026-11-02T02:58:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/represent-matrix-values-as-surface/sssssq8o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/represent-matrix-values-as-surface/sssssq8o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/represent-matrix-values-as-surface/sssssq8o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/represent-matrix-values-as-surface/sssssq8o"/>
      <lastmod>2026-11-02T03:07:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/represent-matrix-values-as-surface/sssssq8o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/represent-matrix-values-as-surface/sssssq8o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/represent-matrix-values-as-surface/sssssq8o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/represent-matrix-values-as-surface/sssssq8o"/>
      <lastmod>2026-11-02T03:07:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-function-via-two-points/sssssqus</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-via-two-points/sssssqus"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-via-two-points/sssssqus"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-via-two-points/sssssqus"/>
      <lastmod>2026-11-02T13:07:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-function-via-two-points/sssssqus</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-via-two-points/sssssqus"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-via-two-points/sssssqus"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-via-two-points/sssssqus"/>
      <lastmod>2026-11-02T13:07:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumference-of-a-unit-circle/sssssqu7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumference-of-a-unit-circle/sssssqu7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumference-of-a-unit-circle/sssssqu7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumference-of-a-unit-circle/sssssqu7"/>
      <lastmod>2026-11-02T18:49:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumference-of-a-unit-circle/sssssqu7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumference-of-a-unit-circle/sssssqu7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumference-of-a-unit-circle/sssssqu7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumference-of-a-unit-circle/sssssqu7"/>
      <lastmod>2026-11-02T18:49:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-in-a-right-triangle-by-james-goldberg/sssssqun</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-in-a-right-triangle-by-james-goldberg/sssssqun"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-in-a-right-triangle-by-james-goldberg/sssssqun"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-in-a-right-triangle-by-james-goldberg/sssssqun"/>
      <lastmod>2026-11-02T17:38:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-in-a-right-triangle-by-james-goldberg/sssssqun</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-in-a-right-triangle-by-james-goldberg/sssssqun"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-in-a-right-triangle-by-james-goldberg/sssssqun"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-in-a-right-triangle-by-james-goldberg/sssssqun"/>
      <lastmod>2026-11-02T17:38:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-quadratic-functions-in-completed-square-form/sssssqu2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-quadratic-functions-in-completed-square-form/sssssqu2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-quadratic-functions-in-completed-square-form/sssssqu2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-quadratic-functions-in-completed-square-form/sssssqu2"/>
      <lastmod>2026-11-02T07:29:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-quadratic-functions-in-completed-square-form/sssssqu2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-quadratic-functions-in-completed-square-form/sssssqu2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-quadratic-functions-in-completed-square-form/sssssqu2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-quadratic-functions-in-completed-square-form/sssssqu2"/>
      <lastmod>2026-11-02T07:29:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tessellation-explorer-regular-polygons/sssssquk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tessellation-explorer-regular-polygons/sssssquk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tessellation-explorer-regular-polygons/sssssquk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tessellation-explorer-regular-polygons/sssssquk"/>
      <lastmod>2026-11-02T16:52:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tessellation-explorer-regular-polygons/sssssquk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tessellation-explorer-regular-polygons/sssssquk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tessellation-explorer-regular-polygons/sssssquk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tessellation-explorer-regular-polygons/sssssquk"/>
      <lastmod>2026-11-02T16:52:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-pyramid-3d-geometric-model/sssssquz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-pyramid-3d-geometric-model/sssssquz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-pyramid-3d-geometric-model/sssssquz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-pyramid-3d-geometric-model/sssssquz"/>
      <lastmod>2026-11-02T10:53:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-pyramid-3d-geometric-model/sssssquz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-pyramid-3d-geometric-model/sssssquz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-pyramid-3d-geometric-model/sssssquz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-pyramid-3d-geometric-model/sssssquz"/>
      <lastmod>2026-11-02T10:53:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equilateral-triangle-rotation-puzzle-by-david-wees/sssssqu0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangle-rotation-puzzle-by-david-wees/sssssqu0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangle-rotation-puzzle-by-david-wees/sssssqu0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangle-rotation-puzzle-by-david-wees/sssssqu0"/>
      <lastmod>2026-11-02T02:36:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equilateral-triangle-rotation-puzzle-by-david-wees/sssssqu0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangle-rotation-puzzle-by-david-wees/sssssqu0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangle-rotation-puzzle-by-david-wees/sssssqu0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangle-rotation-puzzle-by-david-wees/sssssqu0"/>
      <lastmod>2026-11-02T02:36:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-rhombus-by-bkinnell/sssssqud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-rhombus-by-bkinnell/sssssqud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-rhombus-by-bkinnell/sssssqud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-rhombus-by-bkinnell/sssssqud"/>
      <lastmod>2026-11-01T19:26:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-rhombus-by-bkinnell/sssssqud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-rhombus-by-bkinnell/sssssqud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-rhombus-by-bkinnell/sssssqud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-rhombus-by-bkinnell/sssssqud"/>
      <lastmod>2026-11-01T19:26:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadric-surfaces-by-osvaldo-choucair-vaz-da-silva/sssssquf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadric-surfaces-by-osvaldo-choucair-vaz-da-silva/sssssquf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadric-surfaces-by-osvaldo-choucair-vaz-da-silva/sssssquf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadric-surfaces-by-osvaldo-choucair-vaz-da-silva/sssssquf"/>
      <lastmod>2026-11-02T00:47:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadric-surfaces-by-osvaldo-choucair-vaz-da-silva/sssssquf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadric-surfaces-by-osvaldo-choucair-vaz-da-silva/sssssquf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadric-surfaces-by-osvaldo-choucair-vaz-da-silva/sssssquf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadric-surfaces-by-osvaldo-choucair-vaz-da-silva/sssssquf"/>
      <lastmod>2026-11-02T00:47:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigation-of-translating-a-line-segment/sssssqu8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigation-of-translating-a-line-segment/sssssqu8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigation-of-translating-a-line-segment/sssssqu8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigation-of-translating-a-line-segment/sssssqu8"/>
      <lastmod>2026-11-02T18:02:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigation-of-translating-a-line-segment/sssssqu8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigation-of-translating-a-line-segment/sssssqu8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigation-of-translating-a-line-segment/sssssqu8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigation-of-translating-a-line-segment/sssssqu8"/>
      <lastmod>2026-11-02T18:02:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-simulation-the-cost-of-an-ice-cream/sssssquu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-simulation-the-cost-of-an-ice-cream/sssssquu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-simulation-the-cost-of-an-ice-cream/sssssquu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-simulation-the-cost-of-an-ice-cream/sssssquu"/>
      <lastmod>2026-11-01T20:39:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-simulation-the-cost-of-an-ice-cream/sssssquu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-simulation-the-cost-of-an-ice-cream/sssssquu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-simulation-the-cost-of-an-ice-cream/sssssquu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-simulation-the-cost-of-an-ice-cream/sssssquu"/>
      <lastmod>2026-11-01T20:39:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-volume-construction-demo/sssssqu5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-construction-demo/sssssqu5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-construction-demo/sssssqu5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-construction-demo/sssssqu5"/>
      <lastmod>2026-11-02T18:22:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-volume-construction-demo/sssssqu5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-construction-demo/sssssqu5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-construction-demo/sssssqu5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-construction-demo/sssssqu5"/>
      <lastmod>2026-11-02T18:22:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adjacent-cells/sssssqub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjacent-cells/sssssqub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjacent-cells/sssssqub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjacent-cells/sssssqub"/>
      <lastmod>2026-11-01T23:10:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adjacent-cells/sssssqub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjacent-cells/sssssqub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjacent-cells/sssssqub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjacent-cells/sssssqub"/>
      <lastmod>2026-11-01T23:10:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-of-1-1-x-2-sssssw9a/sssssqu3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-1-1-x-2-sssssw9a/sssssqu3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-1-1-x-2-sssssw9a/sssssqu3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-1-1-x-2-sssssw9a/sssssqu3"/>
      <lastmod>2026-11-02T03:11:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-of-1-1-x-2-sssssw9a/sssssqu3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-1-1-x-2-sssssw9a/sssssqu3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-1-1-x-2-sssssw9a/sssssqu3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-1-1-x-2-sssssw9a/sssssqu3"/>
      <lastmod>2026-11-02T03:11:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-salmi-demonstration/sssssquq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-salmi-demonstration/sssssquq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-salmi-demonstration/sssssquq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-salmi-demonstration/sssssquq"/>
      <lastmod>2026-11-02T11:44:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-salmi-demonstration/sssssquq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-salmi-demonstration/sssssquq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-salmi-demonstration/sssssquq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-salmi-demonstration/sssssquq"/>
      <lastmod>2026-11-02T11:44:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-laws-practice/sssssqu1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-laws-practice/sssssqu1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-laws-practice/sssssqu1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-laws-practice/sssssqu1"/>
      <lastmod>2026-11-01T20:56:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-laws-practice/sssssqu1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-laws-practice/sssssqu1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-laws-practice/sssssqu1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-laws-practice/sssssqu1"/>
      <lastmod>2026-11-01T20:56:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/center-of-dilation/sssssqum</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-dilation/sssssqum"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-dilation/sssssqum"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-dilation/sssssqum"/>
      <lastmod>2026-11-01T23:14:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/center-of-dilation/sssssqum</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-dilation/sssssqum"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-dilation/sssssqum"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-dilation/sssssqum"/>
      <lastmod>2026-11-01T23:14:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/left-and-right-hand-limits/sssssquj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/left-and-right-hand-limits/sssssquj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/left-and-right-hand-limits/sssssquj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/left-and-right-hand-limits/sssssquj"/>
      <lastmod>2026-11-01T21:19:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/left-and-right-hand-limits/sssssquj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/left-and-right-hand-limits/sssssquj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/left-and-right-hand-limits/sssssquj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/left-and-right-hand-limits/sssssquj"/>
      <lastmod>2026-11-01T21:19:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-rhombus-by-andrea-siwik/sssssqup</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-rhombus-by-andrea-siwik/sssssqup"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-rhombus-by-andrea-siwik/sssssqup"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-rhombus-by-andrea-siwik/sssssqup"/>
      <lastmod>2026-11-02T02:33:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-rhombus-by-andrea-siwik/sssssqup</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-rhombus-by-andrea-siwik/sssssqup"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-rhombus-by-andrea-siwik/sssssqup"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-rhombus-by-andrea-siwik/sssssqup"/>
      <lastmod>2026-11-02T02:33:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/poisson-distribution-probability-graph/sssssquw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-distribution-probability-graph/sssssquw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-distribution-probability-graph/sssssquw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-distribution-probability-graph/sssssquw"/>
      <lastmod>2026-11-02T12:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/poisson-distribution-probability-graph/sssssquw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-distribution-probability-graph/sssssquw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-distribution-probability-graph/sssssquw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-distribution-probability-graph/sssssquw"/>
      <lastmod>2026-11-02T12:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-transformation-animation/sssssqu6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-transformation-animation/sssssqu6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-transformation-animation/sssssqu6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-transformation-animation/sssssqu6"/>
      <lastmod>2026-11-02T12:06:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-transformation-animation/sssssqu6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-transformation-animation/sssssqu6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-transformation-animation/sssssqu6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-transformation-animation/sssssqu6"/>
      <lastmod>2026-11-02T12:06:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rod-in-a-cylinder/sssssqug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rod-in-a-cylinder/sssssqug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rod-in-a-cylinder/sssssqug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rod-in-a-cylinder/sssssqug"/>
      <lastmod>2026-11-02T02:20:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rod-in-a-cylinder/sssssqug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rod-in-a-cylinder/sssssqug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rod-in-a-cylinder/sssssqug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rod-in-a-cylinder/sssssqug"/>
      <lastmod>2026-11-02T02:20:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-inside-a-prism/sssssqu9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-inside-a-prism/sssssqu9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-inside-a-prism/sssssqu9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-inside-a-prism/sssssqu9"/>
      <lastmod>2026-11-02T12:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-inside-a-prism/sssssqu9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-inside-a-prism/sssssqu9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-inside-a-prism/sssssqu9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-inside-a-prism/sssssqu9"/>
      <lastmod>2026-11-02T12:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-collinearity-demonstration/sssssque</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-collinearity-demonstration/sssssque"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-collinearity-demonstration/sssssque"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-collinearity-demonstration/sssssque"/>
      <lastmod>2026-11-02T13:27:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-collinearity-demonstration/sssssque</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-collinearity-demonstration/sssssque"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-collinearity-demonstration/sssssque"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-collinearity-demonstration/sssssque"/>
      <lastmod>2026-11-02T13:27:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-bisectors-construction-and-properties/sssssquv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisectors-construction-and-properties/sssssquv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisectors-construction-and-properties/sssssquv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisectors-construction-and-properties/sssssquv"/>
      <lastmod>2026-11-02T10:58:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-bisectors-construction-and-properties/sssssquv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisectors-construction-and-properties/sssssquv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisectors-construction-and-properties/sssssquv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisectors-construction-and-properties/sssssquv"/>
      <lastmod>2026-11-02T10:58:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-geometry-activity-template-interactive-math-exploration-for-google-cla/sssssqu4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-geometry-activity-template-interactive-math-exploration-for-google-cla/sssssqu4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-geometry-activity-template-interactive-math-exploration-for-google-cla/sssssqu4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-geometry-activity-template-interactive-math-exploration-for-google-cla/sssssqu4"/>
      <lastmod>2026-11-01T19:06:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-geometry-activity-template-interactive-math-exploration-for-google-cla/sssssqu4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-geometry-activity-template-interactive-math-exploration-for-google-cla/sssssqu4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-geometry-activity-template-interactive-math-exploration-for-google-cla/sssssqu4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-geometry-activity-template-interactive-math-exploration-for-google-cla/sssssqu4"/>
      <lastmod>2026-11-01T19:06:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-numbers-on-sphere-surfaces/sssssqul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-numbers-on-sphere-surfaces/sssssqul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-numbers-on-sphere-surfaces/sssssqul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-numbers-on-sphere-surfaces/sssssqul"/>
      <lastmod>2026-11-01T22:06:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-numbers-on-sphere-surfaces/sssssqul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-numbers-on-sphere-surfaces/sssssqul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-numbers-on-sphere-surfaces/sssssqul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-numbers-on-sphere-surfaces/sssssqul"/>
      <lastmod>2026-11-01T22:06:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/balance-scale-equation-addition-practice/sssssquy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/balance-scale-equation-addition-practice/sssssquy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/balance-scale-equation-addition-practice/sssssquy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/balance-scale-equation-addition-practice/sssssquy"/>
      <lastmod>2026-11-01T19:29:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/balance-scale-equation-addition-practice/sssssquy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/balance-scale-equation-addition-practice/sssssquy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/balance-scale-equation-addition-practice/sssssquy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/balance-scale-equation-addition-practice/sssssquy"/>
      <lastmod>2026-11-01T19:29:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparison-of-transformation-composition-with-translation-dilation-reflection/sssssqua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparison-of-transformation-composition-with-translation-dilation-reflection/sssssqua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparison-of-transformation-composition-with-translation-dilation-reflection/sssssqua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparison-of-transformation-composition-with-translation-dilation-reflection/sssssqua"/>
      <lastmod>2026-11-02T02:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparison-of-transformation-composition-with-translation-dilation-reflection/sssssqua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparison-of-transformation-composition-with-translation-dilation-reflection/sssssqua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparison-of-transformation-composition-with-translation-dilation-reflection/sssssqua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparison-of-transformation-composition-with-translation-dilation-reflection/sssssqua"/>
      <lastmod>2026-11-02T02:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-solids-of-revolution-i/sssssquc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solids-of-revolution-i/sssssquc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solids-of-revolution-i/sssssquc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solids-of-revolution-i/sssssquc"/>
      <lastmod>2026-11-01T23:19:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-solids-of-revolution-i/sssssquc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solids-of-revolution-i/sssssquc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solids-of-revolution-i/sssssquc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solids-of-revolution-i/sssssquc"/>
      <lastmod>2026-11-01T23:19:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ultimate-symmetry-in-cuboids/sssssqur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ultimate-symmetry-in-cuboids/sssssqur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ultimate-symmetry-in-cuboids/sssssqur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ultimate-symmetry-in-cuboids/sssssqur"/>
      <lastmod>2026-11-01T23:25:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ultimate-symmetry-in-cuboids/sssssqur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ultimate-symmetry-in-cuboids/sssssqur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ultimate-symmetry-in-cuboids/sssssqur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ultimate-symmetry-in-cuboids/sssssqur"/>
      <lastmod>2026-11-01T23:25:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractional-linear-equations-demo/sssssquh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractional-linear-equations-demo/sssssquh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractional-linear-equations-demo/sssssquh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractional-linear-equations-demo/sssssquh"/>
      <lastmod>2026-11-02T00:05:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractional-linear-equations-demo/sssssquh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractional-linear-equations-demo/sssssquh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractional-linear-equations-demo/sssssquh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractional-linear-equations-demo/sssssquh"/>
      <lastmod>2026-11-02T00:05:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gas-station-task/sssssqut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gas-station-task/sssssqut"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gas-station-task/sssssqut"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gas-station-task/sssssqut"/>
      <lastmod>2026-11-02T17:11:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gas-station-task/sssssqut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gas-station-task/sssssqut"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gas-station-task/sssssqut"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gas-station-task/sssssqut"/>
      <lastmod>2026-11-02T17:11:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spheres/sssssqux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheres/sssssqux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheres/sssssqux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheres/sssssqux"/>
      <lastmod>2026-11-02T13:08:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spheres/sssssqux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheres/sssssqux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheres/sssssqux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheres/sssssqux"/>
      <lastmod>2026-11-02T13:08:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions-point-slope-form-practice/sssssqui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-point-slope-form-practice/sssssqui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-point-slope-form-practice/sssssqui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-point-slope-form-practice/sssssqui"/>
      <lastmod>2026-11-01T19:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions-point-slope-form-practice/sssssqui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-point-slope-form-practice/sssssqui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-point-slope-form-practice/sssssqui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-point-slope-form-practice/sssssqui"/>
      <lastmod>2026-11-01T19:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-3d-triangle/sssssquo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-3d-triangle/sssssquo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-3d-triangle/sssssquo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-3d-triangle/sssssquo"/>
      <lastmod>2026-11-01T23:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-3d-triangle/sssssquo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-3d-triangle/sssssquo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-3d-triangle/sssssquo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-3d-triangle/sssssquo"/>
      <lastmod>2026-11-01T23:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-your-own-translation/sssssq5s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-your-own-translation/sssssq5s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-your-own-translation/sssssq5s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-your-own-translation/sssssq5s"/>
      <lastmod>2026-11-02T12:12:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-your-own-translation/sssssq5s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-your-own-translation/sssssq5s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-your-own-translation/sssssq5s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-your-own-translation/sssssq5s"/>
      <lastmod>2026-11-02T12:12:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersecting-lines/sssssq57</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-lines/sssssq57"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-lines/sssssq57"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-lines/sssssq57"/>
      <lastmod>2026-11-02T16:57:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersecting-lines/sssssq57</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-lines/sssssq57"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-lines/sssssq57"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-lines/sssssq57"/>
      <lastmod>2026-11-02T16:57:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/building-models-with-cubes/sssssq5n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/building-models-with-cubes/sssssq5n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/building-models-with-cubes/sssssq5n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/building-models-with-cubes/sssssq5n"/>
      <lastmod>2026-11-01T19:04:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/building-models-with-cubes/sssssq5n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/building-models-with-cubes/sssssq5n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/building-models-with-cubes/sssssq5n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/building-models-with-cubes/sssssq5n"/>
      <lastmod>2026-11-01T19:04:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equation-systems-visualization/sssssq52</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-systems-visualization/sssssq52"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-systems-visualization/sssssq52"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-systems-visualization/sssssq52"/>
      <lastmod>2026-11-02T17:04:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equation-systems-visualization/sssssq52</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-systems-visualization/sssssq52"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-systems-visualization/sssssq52"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-systems-visualization/sssssq52"/>
      <lastmod>2026-11-02T17:04:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/further-vectors-1-exercise-12-1-question-7/sssssq5k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/further-vectors-1-exercise-12-1-question-7/sssssq5k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/further-vectors-1-exercise-12-1-question-7/sssssq5k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/further-vectors-1-exercise-12-1-question-7/sssssq5k"/>
      <lastmod>2026-11-02T16:37:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/further-vectors-1-exercise-12-1-question-7/sssssq5k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/further-vectors-1-exercise-12-1-question-7/sssssq5k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/further-vectors-1-exercise-12-1-question-7/sssssq5k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/further-vectors-1-exercise-12-1-question-7/sssssq5k"/>
      <lastmod>2026-11-02T16:37:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hypothesis-testing-with-binomial-distribution/sssssq5z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-testing-with-binomial-distribution/sssssq5z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-testing-with-binomial-distribution/sssssq5z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-testing-with-binomial-distribution/sssssq5z"/>
      <lastmod>2026-11-02T13:49:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hypothesis-testing-with-binomial-distribution/sssssq5z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-testing-with-binomial-distribution/sssssq5z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-testing-with-binomial-distribution/sssssq5z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-testing-with-binomial-distribution/sssssq5z"/>
      <lastmod>2026-11-02T13:49:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diagram-templates-for-ratios-white-background/sssssq50</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagram-templates-for-ratios-white-background/sssssq50"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagram-templates-for-ratios-white-background/sssssq50"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagram-templates-for-ratios-white-background/sssssq50"/>
      <lastmod>2026-11-02T17:47:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diagram-templates-for-ratios-white-background/sssssq50</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagram-templates-for-ratios-white-background/sssssq50"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagram-templates-for-ratios-white-background/sssssq50"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagram-templates-for-ratios-white-background/sssssq50"/>
      <lastmod>2026-11-02T17:47:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-hyperbola-by-hgraber26/sssssq5d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-hyperbola-by-hgraber26/sssssq5d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-hyperbola-by-hgraber26/sssssq5d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-hyperbola-by-hgraber26/sssssq5d"/>
      <lastmod>2026-11-02T16:42:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-hyperbola-by-hgraber26/sssssq5d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-hyperbola-by-hgraber26/sssssq5d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-hyperbola-by-hgraber26/sssssq5d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-hyperbola-by-hgraber26/sssssq5d"/>
      <lastmod>2026-11-02T16:42:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-a-3-b-3-without-words/sssssq5f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-a-3-b-3-without-words/sssssq5f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-a-3-b-3-without-words/sssssq5f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-a-3-b-3-without-words/sssssq5f"/>
      <lastmod>2026-11-01T21:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-a-3-b-3-without-words/sssssq5f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-a-3-b-3-without-words/sssssq5f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-a-3-b-3-without-words/sssssq5f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-a-3-b-3-without-words/sssssq5f"/>
      <lastmod>2026-11-01T21:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/icosahedron-temari-ball-construction/sssssq58</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedron-temari-ball-construction/sssssq58"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedron-temari-ball-construction/sssssq58"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedron-temari-ball-construction/sssssq58"/>
      <lastmod>2026-11-02T10:49:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/icosahedron-temari-ball-construction/sssssq58</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedron-temari-ball-construction/sssssq58"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedron-temari-ball-construction/sssssq58"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedron-temari-ball-construction/sssssq58"/>
      <lastmod>2026-11-02T10:49:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-cube-construction/sssssq5u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-cube-construction/sssssq5u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-cube-construction/sssssq5u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-cube-construction/sssssq5u"/>
      <lastmod>2026-11-02T18:39:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-cube-construction/sssssq5u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-cube-construction/sssssq5u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-cube-construction/sssssq5u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-cube-construction/sssssq5u"/>
      <lastmod>2026-11-02T18:39:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-challenge/sssssq55</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-challenge/sssssq55"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-challenge/sssssq55"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-challenge/sssssq55"/>
      <lastmod>2026-11-02T09:21:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-challenge/sssssq55</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-challenge/sssssq55"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-challenge/sssssq55"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-challenge/sssssq55"/>
      <lastmod>2026-11-02T09:21:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-transformations-of-quadratic-functions/sssssq5b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-transformations-of-quadratic-functions/sssssq5b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-transformations-of-quadratic-functions/sssssq5b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-transformations-of-quadratic-functions/sssssq5b"/>
      <lastmod>2026-11-02T03:04:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-transformations-of-quadratic-functions/sssssq5b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-transformations-of-quadratic-functions/sssssq5b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-transformations-of-quadratic-functions/sssssq5b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-transformations-of-quadratic-functions/sssssq5b"/>
      <lastmod>2026-11-02T03:04:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-perpendicular-to-two-vectors/sssssq53</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-perpendicular-to-two-vectors/sssssq53"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-perpendicular-to-two-vectors/sssssq53"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-perpendicular-to-two-vectors/sssssq53"/>
      <lastmod>2026-11-02T16:34:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-perpendicular-to-two-vectors/sssssq53</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-perpendicular-to-two-vectors/sssssq53"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-perpendicular-to-two-vectors/sssssq53"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-perpendicular-to-two-vectors/sssssq53"/>
      <lastmod>2026-11-02T16:34:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-example-by-joel-keeny/sssssq5q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-example-by-joel-keeny/sssssq5q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-example-by-joel-keeny/sssssq5q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-example-by-joel-keeny/sssssq5q"/>
      <lastmod>2026-11-01T21:00:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-example-by-joel-keeny/sssssq5q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-example-by-joel-keeny/sssssq5q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-example-by-joel-keeny/sssssq5q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-example-by-joel-keeny/sssssq5q"/>
      <lastmod>2026-11-01T21:00:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-coordinates-interactive-3d-visualization-of-points-on-a-sphere/sssssq51</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-interactive-3d-visualization-of-points-on-a-sphere/sssssq51"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-interactive-3d-visualization-of-points-on-a-sphere/sssssq51"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-interactive-3d-visualization-of-points-on-a-sphere/sssssq51"/>
      <lastmod>2026-11-01T21:25:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-coordinates-interactive-3d-visualization-of-points-on-a-sphere/sssssq51</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-interactive-3d-visualization-of-points-on-a-sphere/sssssq51"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-interactive-3d-visualization-of-points-on-a-sphere/sssssq51"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-interactive-3d-visualization-of-points-on-a-sphere/sssssq51"/>
      <lastmod>2026-11-01T21:25:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-number-for-double-octagons/sssssq5m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-number-for-double-octagons/sssssq5m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-number-for-double-octagons/sssssq5m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-number-for-double-octagons/sssssq5m"/>
      <lastmod>2026-11-01T21:56:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-number-for-double-octagons/sssssq5m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-number-for-double-octagons/sssssq5m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-number-for-double-octagons/sssssq5m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-number-for-double-octagons/sssssq5m"/>
      <lastmod>2026-11-01T21:56:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/covid-19-situation-report-march-1-2020-exponential-growth-model/sssssq5j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/covid-19-situation-report-march-1-2020-exponential-growth-model/sssssq5j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/covid-19-situation-report-march-1-2020-exponential-growth-model/sssssq5j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/covid-19-situation-report-march-1-2020-exponential-growth-model/sssssq5j"/>
      <lastmod>2026-11-01T19:24:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/covid-19-situation-report-march-1-2020-exponential-growth-model/sssssq5j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/covid-19-situation-report-march-1-2020-exponential-growth-model/sssssq5j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/covid-19-situation-report-march-1-2020-exponential-growth-model/sssssq5j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/covid-19-situation-report-march-1-2020-exponential-growth-model/sssssq5j"/>
      <lastmod>2026-11-01T19:24:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-from-a-collinear-point-to-a-segment/sssssq5p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-from-a-collinear-point-to-a-segment/sssssq5p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-from-a-collinear-point-to-a-segment/sssssq5p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-from-a-collinear-point-to-a-segment/sssssq5p"/>
      <lastmod>2026-11-02T18:45:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-from-a-collinear-point-to-a-segment/sssssq5p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-from-a-collinear-point-to-a-segment/sssssq5p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-from-a-collinear-point-to-a-segment/sssssq5p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-from-a-collinear-point-to-a-segment/sssssq5p"/>
      <lastmod>2026-11-02T18:45:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/girih-tiles-on-maragha-mausoleum/sssssq5w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/girih-tiles-on-maragha-mausoleum/sssssq5w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/girih-tiles-on-maragha-mausoleum/sssssq5w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/girih-tiles-on-maragha-mausoleum/sssssq5w"/>
      <lastmod>2026-11-02T02:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/girih-tiles-on-maragha-mausoleum/sssssq5w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/girih-tiles-on-maragha-mausoleum/sssssq5w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/girih-tiles-on-maragha-mausoleum/sssssq5w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/girih-tiles-on-maragha-mausoleum/sssssq5w"/>
      <lastmod>2026-11-02T02:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-incircle-volume-calculation/sssssq56</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-incircle-volume-calculation/sssssq56"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-incircle-volume-calculation/sssssq56"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-incircle-volume-calculation/sssssq56"/>
      <lastmod>2026-11-02T13:15:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-incircle-volume-calculation/sssssq56</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-incircle-volume-calculation/sssssq56"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-incircle-volume-calculation/sssssq56"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-incircle-volume-calculation/sssssq56"/>
      <lastmod>2026-11-02T13:15:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-exact-trig-ratios/sssssq5g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-exact-trig-ratios/sssssq5g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-exact-trig-ratios/sssssq5g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-exact-trig-ratios/sssssq5g"/>
      <lastmod>2026-11-01T21:28:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-exact-trig-ratios/sssssq5g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-exact-trig-ratios/sssssq5g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-exact-trig-ratios/sssssq5g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-exact-trig-ratios/sssssq5g"/>
      <lastmod>2026-11-01T21:28:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-shear-proof/sssssq59</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-shear-proof/sssssq59"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-shear-proof/sssssq59"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-shear-proof/sssssq59"/>
      <lastmod>2026-11-01T21:33:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-shear-proof/sssssq59</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-shear-proof/sssssq59"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-shear-proof/sssssq59"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-shear-proof/sssssq59"/>
      <lastmod>2026-11-01T21:33:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/divide-a-cube-into-three-parts/sssssq5e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/divide-a-cube-into-three-parts/sssssq5e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/divide-a-cube-into-three-parts/sssssq5e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/divide-a-cube-into-three-parts/sssssq5e"/>
      <lastmod>2026-11-02T02:56:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/divide-a-cube-into-three-parts/sssssq5e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/divide-a-cube-into-three-parts/sssssq5e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/divide-a-cube-into-three-parts/sssssq5e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/divide-a-cube-into-three-parts/sssssq5e"/>
      <lastmod>2026-11-02T02:56:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euclidean-division/sssssq5v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euclidean-division/sssssq5v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euclidean-division/sssssq5v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euclidean-division/sssssq5v"/>
      <lastmod>2026-11-01T23:14:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euclidean-division/sssssq5v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euclidean-division/sssssq5v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euclidean-division/sssssq5v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euclidean-division/sssssq5v"/>
      <lastmod>2026-11-01T23:14:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-trapezoid/sssssq54</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-trapezoid/sssssq54"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-trapezoid/sssssq54"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-trapezoid/sssssq54"/>
      <lastmod>2026-11-01T21:22:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-trapezoid/sssssq54</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-trapezoid/sssssq54"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-trapezoid/sssssq54"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-trapezoid/sssssq54"/>
      <lastmod>2026-11-01T21:22:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-interior-angles/sssssq5l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-interior-angles/sssssq5l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-interior-angles/sssssq5l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-interior-angles/sssssq5l"/>
      <lastmod>2026-11-02T18:11:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-interior-angles/sssssq5l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-interior-angles/sssssq5l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-interior-angles/sssssq5l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-interior-angles/sssssq5l"/>
      <lastmod>2026-11-02T18:11:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-parallelogram-law/sssssq5y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-parallelogram-law/sssssq5y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-parallelogram-law/sssssq5y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-parallelogram-law/sssssq5y"/>
      <lastmod>2026-11-02T14:55:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-parallelogram-law/sssssq5y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-parallelogram-law/sssssq5y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-parallelogram-law/sssssq5y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-parallelogram-law/sssssq5y"/>
      <lastmod>2026-11-02T14:55:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relative-and-displacement-vectors/sssssq5a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relative-and-displacement-vectors/sssssq5a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relative-and-displacement-vectors/sssssq5a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relative-and-displacement-vectors/sssssq5a"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relative-and-displacement-vectors/sssssq5a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relative-and-displacement-vectors/sssssq5a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relative-and-displacement-vectors/sssssq5a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relative-and-displacement-vectors/sssssq5a"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-and-properties/sssssq5c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-and-properties/sssssq5c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-and-properties/sssssq5c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-and-properties/sssssq5c"/>
      <lastmod>2026-11-02T17:10:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-and-properties/sssssq5c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-and-properties/sssssq5c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-and-properties/sssssq5c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-and-properties/sssssq5c"/>
      <lastmod>2026-11-02T17:10:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-graphing-and-polynomial-fitting-example/sssssq5r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphing-and-polynomial-fitting-example/sssssq5r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphing-and-polynomial-fitting-example/sssssq5r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphing-and-polynomial-fitting-example/sssssq5r"/>
      <lastmod>2026-11-02T17:09:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-graphing-and-polynomial-fitting-example/sssssq5r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphing-and-polynomial-fitting-example/sssssq5r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphing-and-polynomial-fitting-example/sssssq5r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphing-and-polynomial-fitting-example/sssssq5r"/>
      <lastmod>2026-11-02T17:09:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-tree-for-2-coins/sssssq5h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-tree-for-2-coins/sssssq5h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-tree-for-2-coins/sssssq5h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-tree-for-2-coins/sssssq5h"/>
      <lastmod>2026-11-02T18:43:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-tree-for-2-coins/sssssq5h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-tree-for-2-coins/sssssq5h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-tree-for-2-coins/sssssq5h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-tree-for-2-coins/sssssq5h"/>
      <lastmod>2026-11-02T18:43:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-of-a-function/sssssq5t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-of-a-function/sssssq5t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-of-a-function/sssssq5t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-of-a-function/sssssq5t"/>
      <lastmod>2026-11-02T00:05:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-of-a-function/sssssq5t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-of-a-function/sssssq5t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-of-a-function/sssssq5t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-of-a-function/sssssq5t"/>
      <lastmod>2026-11-02T00:05:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigation-for-sum-of-interior-angles-of-polygons/sssssq5x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigation-for-sum-of-interior-angles-of-polygons/sssssq5x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigation-for-sum-of-interior-angles-of-polygons/sssssq5x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigation-for-sum-of-interior-angles-of-polygons/sssssq5x"/>
      <lastmod>2026-11-02T15:38:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigation-for-sum-of-interior-angles-of-polygons/sssssq5x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigation-for-sum-of-interior-angles-of-polygons/sssssq5x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigation-for-sum-of-interior-angles-of-polygons/sssssq5x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigation-for-sum-of-interior-angles-of-polygons/sssssq5x"/>
      <lastmod>2026-11-02T15:38:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-polygons-in-space/sssssq5i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygons-in-space/sssssq5i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygons-in-space/sssssq5i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygons-in-space/sssssq5i"/>
      <lastmod>2026-11-02T09:16:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-polygons-in-space/sssssq5i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygons-in-space/sssssq5i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygons-in-space/sssssq5i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygons-in-space/sssssq5i"/>
      <lastmod>2026-11-02T09:16:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/energy-level-diagrams/sssssq5o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-level-diagrams/sssssq5o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-level-diagrams/sssssq5o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-level-diagrams/sssssq5o"/>
      <lastmod>2026-11-02T18:22:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/energy-level-diagrams/sssssq5o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-level-diagrams/sssssq5o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-level-diagrams/sssssq5o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-level-diagrams/sssssq5o"/>
      <lastmod>2026-11-02T18:22:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/energy-diagrams-2/sssssqbs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-diagrams-2/sssssqbs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-diagrams-2/sssssqbs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-diagrams-2/sssssqbs"/>
      <lastmod>2026-11-02T15:37:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/energy-diagrams-2/sssssqbs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-diagrams-2/sssssqbs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-diagrams-2/sssssqbs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-diagrams-2/sssssqbs"/>
      <lastmod>2026-11-02T15:37:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/flexicuboctahedron-animation/sssssqb7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/flexicuboctahedron-animation/sssssqb7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/flexicuboctahedron-animation/sssssqb7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/flexicuboctahedron-animation/sssssqb7"/>
      <lastmod>2026-11-01T20:35:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/flexicuboctahedron-animation/sssssqb7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/flexicuboctahedron-animation/sssssqb7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/flexicuboctahedron-animation/sssssqb7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/flexicuboctahedron-animation/sssssqb7"/>
      <lastmod>2026-11-01T20:35:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-value-table-creation/sssssqbn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-value-table-creation/sssssqbn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-value-table-creation/sssssqbn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-value-table-creation/sssssqbn"/>
      <lastmod>2026-11-01T23:12:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-value-table-creation/sssssqbn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-value-table-creation/sssssqbn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-value-table-creation/sssssqbn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-value-table-creation/sssssqbn"/>
      <lastmod>2026-11-01T23:12:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gabe-s-radical-technique-on-number-line/sssssqb2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gabe-s-radical-technique-on-number-line/sssssqb2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gabe-s-radical-technique-on-number-line/sssssqb2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gabe-s-radical-technique-on-number-line/sssssqb2"/>
      <lastmod>2026-11-01T23:32:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gabe-s-radical-technique-on-number-line/sssssqb2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gabe-s-radical-technique-on-number-line/sssssqb2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gabe-s-radical-technique-on-number-line/sssssqb2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gabe-s-radical-technique-on-number-line/sssssqb2"/>
      <lastmod>2026-11-01T23:32:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-stacey/sssssqbk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-stacey/sssssqbk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-stacey/sssssqbk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-stacey/sssssqbk"/>
      <lastmod>2026-11-02T18:17:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-stacey/sssssqbk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-stacey/sssssqbk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-stacey/sssssqbk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-stacey/sssssqbk"/>
      <lastmod>2026-11-02T18:17:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-perimeters-of-regular-polygons-with-circumference/sssssqbz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-perimeters-of-regular-polygons-with-circumference/sssssqbz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-perimeters-of-regular-polygons-with-circumference/sssssqbz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-perimeters-of-regular-polygons-with-circumference/sssssqbz"/>
      <lastmod>2026-11-02T17:04:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-perimeters-of-regular-polygons-with-circumference/sssssqbz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-perimeters-of-regular-polygons-with-circumference/sssssqbz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-perimeters-of-regular-polygons-with-circumference/sssssqbz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-perimeters-of-regular-polygons-with-circumference/sssssqbz"/>
      <lastmod>2026-11-02T17:04:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-partial-derivatives-by-andrew-cooper/sssssqb0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-partial-derivatives-by-andrew-cooper/sssssqb0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-partial-derivatives-by-andrew-cooper/sssssqb0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-partial-derivatives-by-andrew-cooper/sssssqb0"/>
      <lastmod>2026-11-01T21:21:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-partial-derivatives-by-andrew-cooper/sssssqb0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-partial-derivatives-by-andrew-cooper/sssssqb0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-partial-derivatives-by-andrew-cooper/sssssqb0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-partial-derivatives-by-andrew-cooper/sssssqb0"/>
      <lastmod>2026-11-01T21:21:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-triangle/sssssqbd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-triangle/sssssqbd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-triangle/sssssqbd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-triangle/sssssqbd"/>
      <lastmod>2026-11-02T12:47:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-triangle/sssssqbd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-triangle/sssssqbd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-triangle/sssssqbd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-triangle/sssssqbd"/>
      <lastmod>2026-11-02T12:47:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-aaa-construction-and-demonstration/sssssqbf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-aaa-construction-and-demonstration/sssssqbf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-aaa-construction-and-demonstration/sssssqbf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-aaa-construction-and-demonstration/sssssqbf"/>
      <lastmod>2026-11-02T17:48:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-aaa-construction-and-demonstration/sssssqbf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-aaa-construction-and-demonstration/sssssqbf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-aaa-construction-and-demonstration/sssssqbf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-aaa-construction-and-demonstration/sssssqbf"/>
      <lastmod>2026-11-02T17:48:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-net-diagram-by-gangalapudi-bhasker/sssssqb8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net-diagram-by-gangalapudi-bhasker/sssssqb8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net-diagram-by-gangalapudi-bhasker/sssssqb8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net-diagram-by-gangalapudi-bhasker/sssssqb8"/>
      <lastmod>2026-11-02T16:57:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-net-diagram-by-gangalapudi-bhasker/sssssqb8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net-diagram-by-gangalapudi-bhasker/sssssqb8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net-diagram-by-gangalapudi-bhasker/sssssqb8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net-diagram-by-gangalapudi-bhasker/sssssqb8"/>
      <lastmod>2026-11-02T16:57:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/password-generator-b/sssssqbu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/password-generator-b/sssssqbu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/password-generator-b/sssssqbu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/password-generator-b/sssssqbu"/>
      <lastmod>2026-11-01T23:21:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/password-generator-b/sssssqbu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/password-generator-b/sssssqbu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/password-generator-b/sssssqbu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/password-generator-b/sssssqbu"/>
      <lastmod>2026-11-01T23:21:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-exploration-by-vincent-panetta-2/sssssqb5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-exploration-by-vincent-panetta-2/sssssqb5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-exploration-by-vincent-panetta-2/sssssqb5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-exploration-by-vincent-panetta-2/sssssqb5"/>
      <lastmod>2026-11-02T18:56:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-exploration-by-vincent-panetta-2/sssssqb5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-exploration-by-vincent-panetta-2/sssssqb5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-exploration-by-vincent-panetta-2/sssssqb5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-exploration-by-vincent-panetta-2/sssssqb5"/>
      <lastmod>2026-11-02T18:56:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/section-of-a-tetrahedron-inside-a-cube/sssssqbb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/section-of-a-tetrahedron-inside-a-cube/sssssqbb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/section-of-a-tetrahedron-inside-a-cube/sssssqbb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/section-of-a-tetrahedron-inside-a-cube/sssssqbb"/>
      <lastmod>2026-11-02T18:15:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/section-of-a-tetrahedron-inside-a-cube/sssssqbb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/section-of-a-tetrahedron-inside-a-cube/sssssqbb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/section-of-a-tetrahedron-inside-a-cube/sssssqbb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/section-of-a-tetrahedron-inside-a-cube/sssssqbb"/>
      <lastmod>2026-11-02T18:15:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-angle-sum-identity/sssssqb3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-angle-sum-identity/sssssqb3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-angle-sum-identity/sssssqb3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-angle-sum-identity/sssssqb3"/>
      <lastmod>2026-11-01T23:30:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-angle-sum-identity/sssssqb3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-angle-sum-identity/sssssqb3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-angle-sum-identity/sssssqb3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-angle-sum-identity/sssssqb3"/>
      <lastmod>2026-11-01T23:30:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relative-frequency-distributions/sssssqbq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relative-frequency-distributions/sssssqbq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relative-frequency-distributions/sssssqbq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relative-frequency-distributions/sssssqbq"/>
      <lastmod>2026-11-01T19:01:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relative-frequency-distributions/sssssqbq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relative-frequency-distributions/sssssqbq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relative-frequency-distributions/sssssqbq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relative-frequency-distributions/sssssqbq"/>
      <lastmod>2026-11-01T19:01:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-test-example/sssssqb1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-test-example/sssssqb1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-test-example/sssssqb1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-test-example/sssssqb1"/>
      <lastmod>2026-11-01T21:53:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-test-example/sssssqb1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-test-example/sssssqb1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-test-example/sssssqb1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-test-example/sssssqb1"/>
      <lastmod>2026-11-01T21:53:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-a-square/sssssqbm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-square/sssssqbm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-square/sssssqbm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-square/sssssqbm"/>
      <lastmod>2026-11-01T23:54:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-a-square/sssssqbm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-square/sssssqbm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-square/sssssqbm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-square/sssssqbm"/>
      <lastmod>2026-11-01T23:54:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-and-kite-property-exploration-by-charles-criniere/sssssqbj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-kite-property-exploration-by-charles-criniere/sssssqbj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-kite-property-exploration-by-charles-criniere/sssssqbj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-kite-property-exploration-by-charles-criniere/sssssqbj"/>
      <lastmod>2026-11-02T17:37:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-and-kite-property-exploration-by-charles-criniere/sssssqbj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-kite-property-exploration-by-charles-criniere/sssssqbj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-kite-property-exploration-by-charles-criniere/sssssqbj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-kite-property-exploration-by-charles-criniere/sssssqbj"/>
      <lastmod>2026-11-02T17:37:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-graph/sssssqbp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-graph/sssssqbp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-graph/sssssqbp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-graph/sssssqbp"/>
      <lastmod>2026-11-02T17:51:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-graph/sssssqbp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-graph/sssssqbp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-graph/sssssqbp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-graph/sssssqbp"/>
      <lastmod>2026-11-02T17:51:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-geometric-construction-and-volume-calculation/sssssqbw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-geometric-construction-and-volume-calculation/sssssqbw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-geometric-construction-and-volume-calculation/sssssqbw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-geometric-construction-and-volume-calculation/sssssqbw"/>
      <lastmod>2026-11-02T00:47:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-geometric-construction-and-volume-calculation/sssssqbw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-geometric-construction-and-volume-calculation/sssssqbw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-geometric-construction-and-volume-calculation/sssssqbw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-geometric-construction-and-volume-calculation/sssssqbw"/>
      <lastmod>2026-11-02T00:47:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-prism-by-alex-smith/sssssqb6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-prism-by-alex-smith/sssssqb6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-prism-by-alex-smith/sssssqb6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-prism-by-alex-smith/sssssqb6"/>
      <lastmod>2026-11-02T18:12:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-prism-by-alex-smith/sssssqb6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-prism-by-alex-smith/sssssqb6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-prism-by-alex-smith/sssssqb6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-prism-by-alex-smith/sssssqb6"/>
      <lastmod>2026-11-02T18:12:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-3-4-practice-unit-conversion/sssssqbg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-3-4-practice-unit-conversion/sssssqbg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-3-4-practice-unit-conversion/sssssqbg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-3-4-practice-unit-conversion/sssssqbg"/>
      <lastmod>2026-11-01T20:35:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-3-4-practice-unit-conversion/sssssqbg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-3-4-practice-unit-conversion/sssssqbg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-3-4-practice-unit-conversion/sssssqbg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-3-4-practice-unit-conversion/sssssqbg"/>
      <lastmod>2026-11-01T20:35:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-vector-function-graph-interaction-example/sssssqb9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vector-function-graph-interaction-example/sssssqb9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vector-function-graph-interaction-example/sssssqb9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vector-function-graph-interaction-example/sssssqb9"/>
      <lastmod>2026-11-02T10:42:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-vector-function-graph-interaction-example/sssssqb9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vector-function-graph-interaction-example/sssssqb9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vector-function-graph-interaction-example/sssssqb9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vector-function-graph-interaction-example/sssssqb9"/>
      <lastmod>2026-11-02T10:42:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-construction-and-properties/sssssqbe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-and-properties/sssssqbe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-and-properties/sssssqbe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-and-properties/sssssqbe"/>
      <lastmod>2026-11-01T20:54:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-construction-and-properties/sssssqbe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-and-properties/sssssqbe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-and-properties/sssssqbe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-and-properties/sssssqbe"/>
      <lastmod>2026-11-01T20:54:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/build-prisms/sssssqbv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-prisms/sssssqbv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-prisms/sssssqbv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-prisms/sssssqbv"/>
      <lastmod>2026-11-01T21:31:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/build-prisms/sssssqbv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-prisms/sssssqbv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-prisms/sssssqbv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-prisms/sssssqbv"/>
      <lastmod>2026-11-01T21:31:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/different-ways-to-draw-straight-lines-in-geogebra/sssssqb4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-ways-to-draw-straight-lines-in-geogebra/sssssqb4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-ways-to-draw-straight-lines-in-geogebra/sssssqb4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-ways-to-draw-straight-lines-in-geogebra/sssssqb4"/>
      <lastmod>2026-11-02T13:35:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/different-ways-to-draw-straight-lines-in-geogebra/sssssqb4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-ways-to-draw-straight-lines-in-geogebra/sssssqb4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-ways-to-draw-straight-lines-in-geogebra/sssssqb4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-ways-to-draw-straight-lines-in-geogebra/sssssqb4"/>
      <lastmod>2026-11-02T13:35:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/root-rectangle-6/sssssqbl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangle-6/sssssqbl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangle-6/sssssqbl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangle-6/sssssqbl"/>
      <lastmod>2026-11-02T18:26:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/root-rectangle-6/sssssqbl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangle-6/sssssqbl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangle-6/sssssqbl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangle-6/sssssqbl"/>
      <lastmod>2026-11-02T18:26:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-numbers-polar-and-exponential-forms/sssssqby</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-polar-and-exponential-forms/sssssqby"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-polar-and-exponential-forms/sssssqby"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-polar-and-exponential-forms/sssssqby"/>
      <lastmod>2026-11-01T20:54:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-numbers-polar-and-exponential-forms/sssssqby</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-polar-and-exponential-forms/sssssqby"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-polar-and-exponential-forms/sssssqby"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-polar-and-exponential-forms/sssssqby"/>
      <lastmod>2026-11-01T20:54:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-triangle-stretching/sssssqba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-triangle-stretching/sssssqba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-triangle-stretching/sssssqba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-triangle-stretching/sssssqba"/>
      <lastmod>2026-11-02T00:15:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-triangle-stretching/sssssqba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-triangle-stretching/sssssqba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-triangle-stretching/sssssqba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-triangle-stretching/sssssqba"/>
      <lastmod>2026-11-02T00:15:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logistic-growth-exploration/sssssqbc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logistic-growth-exploration/sssssqbc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logistic-growth-exploration/sssssqbc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logistic-growth-exploration/sssssqbc"/>
      <lastmod>2026-11-01T20:46:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logistic-growth-exploration/sssssqbc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logistic-growth-exploration/sssssqbc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logistic-growth-exploration/sssssqbc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logistic-growth-exploration/sssssqbc"/>
      <lastmod>2026-11-01T20:46:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-operations-demonstration/sssssqbr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-operations-demonstration/sssssqbr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-operations-demonstration/sssssqbr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-operations-demonstration/sssssqbr"/>
      <lastmod>2026-11-02T09:26:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-operations-demonstration/sssssqbr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-operations-demonstration/sssssqbr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-operations-demonstration/sssssqbr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-operations-demonstration/sssssqbr"/>
      <lastmod>2026-11-02T09:26:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-of-a-binomial-by-gaetano-di-caprio/sssssqbh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-of-a-binomial-by-gaetano-di-caprio/sssssqbh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-of-a-binomial-by-gaetano-di-caprio/sssssqbh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-of-a-binomial-by-gaetano-di-caprio/sssssqbh"/>
      <lastmod>2026-11-02T17:48:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-of-a-binomial-by-gaetano-di-caprio/sssssqbh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-of-a-binomial-by-gaetano-di-caprio/sssssqbh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-of-a-binomial-by-gaetano-di-caprio/sssssqbh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-of-a-binomial-by-gaetano-di-caprio/sssssqbh"/>
      <lastmod>2026-11-02T17:48:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-recipes-task/sssssqbt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-recipes-task/sssssqbt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-recipes-task/sssssqbt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-recipes-task/sssssqbt"/>
      <lastmod>2026-11-02T17:06:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-recipes-task/sssssqbt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-recipes-task/sssssqbt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-recipes-task/sssssqbt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-recipes-task/sssssqbt"/>
      <lastmod>2026-11-02T17:06:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-demonstration-of-high-power-differences/sssssqbx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-demonstration-of-high-power-differences/sssssqbx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-demonstration-of-high-power-differences/sssssqbx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-demonstration-of-high-power-differences/sssssqbx"/>
      <lastmod>2026-11-01T21:53:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-demonstration-of-high-power-differences/sssssqbx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-demonstration-of-high-power-differences/sssssqbx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-demonstration-of-high-power-differences/sssssqbx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-demonstration-of-high-power-differences/sssssqbx"/>
      <lastmod>2026-11-01T21:53:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-and-lognormal-distributions-mode-median-and-mean/sssssqbi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-and-lognormal-distributions-mode-median-and-mean/sssssqbi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-and-lognormal-distributions-mode-median-and-mean/sssssqbi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-and-lognormal-distributions-mode-median-and-mean/sssssqbi"/>
      <lastmod>2026-11-01T21:45:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-and-lognormal-distributions-mode-median-and-mean/sssssqbi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-and-lognormal-distributions-mode-median-and-mean/sssssqbi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-and-lognormal-distributions-mode-median-and-mean/sssssqbi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-and-lognormal-distributions-mode-median-and-mean/sssssqbi"/>
      <lastmod>2026-11-01T21:45:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-estimation/sssssqbo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-estimation/sssssqbo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-estimation/sssssqbo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-estimation/sssssqbo"/>
      <lastmod>2026-11-02T17:53:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-estimation/sssssqbo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-estimation/sssssqbo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-estimation/sssssqbo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-estimation/sssssqbo"/>
      <lastmod>2026-11-02T17:53:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-at-45-degrees/sssssq3s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-at-45-degrees/sssssq3s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-at-45-degrees/sssssq3s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-at-45-degrees/sssssq3s"/>
      <lastmod>2026-11-02T18:36:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-at-45-degrees/sssssq3s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-at-45-degrees/sssssq3s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-at-45-degrees/sssssq3s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-at-45-degrees/sssssq3s"/>
      <lastmod>2026-11-02T18:36:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-by-geogebra-team/sssssq37</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-by-geogebra-team/sssssq37"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-by-geogebra-team/sssssq37"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-by-geogebra-team/sssssq37"/>
      <lastmod>2026-11-01T23:23:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-by-geogebra-team/sssssq37</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-by-geogebra-team/sssssq37"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-by-geogebra-team/sssssq37"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-by-geogebra-team/sssssq37"/>
      <lastmod>2026-11-01T23:23:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-by-mark-catalfano/sssssq3n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-by-mark-catalfano/sssssq3n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-by-mark-catalfano/sssssq3n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-by-mark-catalfano/sssssq3n"/>
      <lastmod>2026-11-02T12:10:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-by-mark-catalfano/sssssq3n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-by-mark-catalfano/sssssq3n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-by-mark-catalfano/sssssq3n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-by-mark-catalfano/sssssq3n"/>
      <lastmod>2026-11-02T12:10:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/l-2-loss-function-for-linear-regression-on-y-2x/sssssq32</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/l-2-loss-function-for-linear-regression-on-y-2x/sssssq32"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/l-2-loss-function-for-linear-regression-on-y-2x/sssssq32"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/l-2-loss-function-for-linear-regression-on-y-2x/sssssq32"/>
      <lastmod>2026-11-01T23:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/l-2-loss-function-for-linear-regression-on-y-2x/sssssq32</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/l-2-loss-function-for-linear-regression-on-y-2x/sssssq32"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/l-2-loss-function-for-linear-regression-on-y-2x/sssssq32"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/l-2-loss-function-for-linear-regression-on-y-2x/sssssq32"/>
      <lastmod>2026-11-01T23:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phase-shifts-of-complex-numbers/sssssq3k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phase-shifts-of-complex-numbers/sssssq3k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phase-shifts-of-complex-numbers/sssssq3k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phase-shifts-of-complex-numbers/sssssq3k"/>
      <lastmod>2026-11-01T20:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phase-shifts-of-complex-numbers/sssssq3k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phase-shifts-of-complex-numbers/sssssq3k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phase-shifts-of-complex-numbers/sssssq3k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phase-shifts-of-complex-numbers/sssssq3k"/>
      <lastmod>2026-11-01T20:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-three-planes-by-kathryn-peake/sssssq3z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-three-planes-by-kathryn-peake/sssssq3z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-three-planes-by-kathryn-peake/sssssq3z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-three-planes-by-kathryn-peake/sssssq3z"/>
      <lastmod>2026-11-02T16:37:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-three-planes-by-kathryn-peake/sssssq3z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-three-planes-by-kathryn-peake/sssssq3z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-three-planes-by-kathryn-peake/sssssq3z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-three-planes-by-kathryn-peake/sssssq3z"/>
      <lastmod>2026-11-02T16:37:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-circular-cylinder-surface-area-and-volume/sssssq30</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-circular-cylinder-surface-area-and-volume/sssssq30"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-circular-cylinder-surface-area-and-volume/sssssq30"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-circular-cylinder-surface-area-and-volume/sssssq30"/>
      <lastmod>2026-11-01T19:01:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-circular-cylinder-surface-area-and-volume/sssssq30</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-circular-cylinder-surface-area-and-volume/sssssq30"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-circular-cylinder-surface-area-and-volume/sssssq30"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-circular-cylinder-surface-area-and-volume/sssssq30"/>
      <lastmod>2026-11-01T19:01:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-and-surface-area-of-triangular-prism-by-trevor-leach/sssssq3d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-triangular-prism-by-trevor-leach/sssssq3d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-and-surface-area-of-triangular-prism-by-trevor-leach/sssssq3d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-triangular-prism-by-trevor-leach/sssssq3d"/>
      <lastmod>2026-11-02T03:02:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-and-surface-area-of-triangular-prism-by-trevor-leach/sssssq3d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-triangular-prism-by-trevor-leach/sssssq3d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-and-surface-area-of-triangular-prism-by-trevor-leach/sssssq3d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-triangular-prism-by-trevor-leach/sssssq3d"/>
      <lastmod>2026-11-02T03:02:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-parabola-by-nicholas-hannan/sssssq3f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parabola-by-nicholas-hannan/sssssq3f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parabola-by-nicholas-hannan/sssssq3f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parabola-by-nicholas-hannan/sssssq3f"/>
      <lastmod>2026-11-02T18:58:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-parabola-by-nicholas-hannan/sssssq3f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parabola-by-nicholas-hannan/sssssq3f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parabola-by-nicholas-hannan/sssssq3f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parabola-by-nicholas-hannan/sssssq3f"/>
      <lastmod>2026-11-02T18:58:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-on-number-line/sssssq38</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-on-number-line/sssssq38"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-on-number-line/sssssq38"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-on-number-line/sssssq38"/>
      <lastmod>2026-11-02T02:40:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-on-number-line/sssssq38</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-on-number-line/sssssq38"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-on-number-line/sssssq38"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-on-number-line/sssssq38"/>
      <lastmod>2026-11-02T02:40:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebra-2-mini-quiz-13-exponents-roots-and-logs/sssssq3u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-mini-quiz-13-exponents-roots-and-logs/sssssq3u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-mini-quiz-13-exponents-roots-and-logs/sssssq3u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-mini-quiz-13-exponents-roots-and-logs/sssssq3u"/>
      <lastmod>2026-11-02T17:47:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebra-2-mini-quiz-13-exponents-roots-and-logs/sssssq3u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-mini-quiz-13-exponents-roots-and-logs/sssssq3u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-mini-quiz-13-exponents-roots-and-logs/sssssq3u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-mini-quiz-13-exponents-roots-and-logs/sssssq3u"/>
      <lastmod>2026-11-02T17:47:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-surface-log-z/sssssq35</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-surface-log-z/sssssq35"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-surface-log-z/sssssq35"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-surface-log-z/sssssq35"/>
      <lastmod>2026-11-02T16:40:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-surface-log-z/sssssq35</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-surface-log-z/sssssq35"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-surface-log-z/sssssq35"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-surface-log-z/sssssq35"/>
      <lastmod>2026-11-02T16:40:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-complementary-ratios/sssssq3b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-complementary-ratios/sssssq3b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-complementary-ratios/sssssq3b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-complementary-ratios/sssssq3b"/>
      <lastmod>2026-11-02T00:49:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-complementary-ratios/sssssq3b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-complementary-ratios/sssssq3b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-complementary-ratios/sssssq3b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-complementary-ratios/sssssq3b"/>
      <lastmod>2026-11-02T00:49:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explaining-derivative/sssssq33</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explaining-derivative/sssssq33"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explaining-derivative/sssssq33"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explaining-derivative/sssssq33"/>
      <lastmod>2026-11-02T12:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explaining-derivative/sssssq33</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explaining-derivative/sssssq33"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explaining-derivative/sssssq33"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explaining-derivative/sssssq33"/>
      <lastmod>2026-11-02T12:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-of-circles-sector-division-and-rotation/sssssq3q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-of-circles-sector-division-and-rotation/sssssq3q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-of-circles-sector-division-and-rotation/sssssq3q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-of-circles-sector-division-and-rotation/sssssq3q"/>
      <lastmod>2026-11-02T17:44:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-of-circles-sector-division-and-rotation/sssssq3q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-of-circles-sector-division-and-rotation/sssssq3q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-of-circles-sector-division-and-rotation/sssssq3q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-of-circles-sector-division-and-rotation/sssssq3q"/>
      <lastmod>2026-11-02T17:44:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-volume-calculation-demo-by-j-b/sssssq31</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-calculation-demo-by-j-b/sssssq31"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-calculation-demo-by-j-b/sssssq31"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-calculation-demo-by-j-b/sssssq31"/>
      <lastmod>2026-11-02T18:13:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-volume-calculation-demo-by-j-b/sssssq31</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-calculation-demo-by-j-b/sssssq31"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-calculation-demo-by-j-b/sssssq31"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-calculation-demo-by-j-b/sssssq31"/>
      <lastmod>2026-11-02T18:13:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-of-theft-losses/sssssq3m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-of-theft-losses/sssssq3m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-of-theft-losses/sssssq3m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-of-theft-losses/sssssq3m"/>
      <lastmod>2026-11-01T19:25:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-of-theft-losses/sssssq3m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-of-theft-losses/sssssq3m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-of-theft-losses/sssssq3m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-of-theft-losses/sssssq3m"/>
      <lastmod>2026-11-01T19:25:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-tetrahedron-3d-construction-and-geometric-analysis/sssssq3j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-tetrahedron-3d-construction-and-geometric-analysis/sssssq3j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-tetrahedron-3d-construction-and-geometric-analysis/sssssq3j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-tetrahedron-3d-construction-and-geometric-analysis/sssssq3j"/>
      <lastmod>2026-11-02T18:38:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-tetrahedron-3d-construction-and-geometric-analysis/sssssq3j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-tetrahedron-3d-construction-and-geometric-analysis/sssssq3j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-tetrahedron-3d-construction-and-geometric-analysis/sssssq3j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-tetrahedron-3d-construction-and-geometric-analysis/sssssq3j"/>
      <lastmod>2026-11-02T18:38:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gradient-function-of-exponential-functions/sssssq3p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-function-of-exponential-functions/sssssq3p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-function-of-exponential-functions/sssssq3p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-function-of-exponential-functions/sssssq3p"/>
      <lastmod>2026-11-02T16:31:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gradient-function-of-exponential-functions/sssssq3p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-function-of-exponential-functions/sssssq3p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-function-of-exponential-functions/sssssq3p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-function-of-exponential-functions/sssssq3p"/>
      <lastmod>2026-11-02T16:31:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/foci-of-a-hyperbola/sssssq3w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/foci-of-a-hyperbola/sssssq3w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/foci-of-a-hyperbola/sssssq3w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/foci-of-a-hyperbola/sssssq3w"/>
      <lastmod>2026-11-02T16:38:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/foci-of-a-hyperbola/sssssq3w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/foci-of-a-hyperbola/sssssq3w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/foci-of-a-hyperbola/sssssq3w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/foci-of-a-hyperbola/sssssq3w"/>
      <lastmod>2026-11-02T16:38:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-shapes-in-daily-life/sssssq36</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-shapes-in-daily-life/sssssq36"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-shapes-in-daily-life/sssssq36"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-shapes-in-daily-life/sssssq36"/>
      <lastmod>2026-11-01T21:46:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-shapes-in-daily-life/sssssq36</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-shapes-in-daily-life/sssssq36"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-shapes-in-daily-life/sssssq36"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-shapes-in-daily-life/sssssq36"/>
      <lastmod>2026-11-01T21:46:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinate-planes/sssssq3g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-planes/sssssq3g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-planes/sssssq3g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-planes/sssssq3g"/>
      <lastmod>2026-11-02T16:31:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinate-planes/sssssq3g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-planes/sssssq3g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-planes/sssssq3g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-planes/sssssq3g"/>
      <lastmod>2026-11-02T16:31:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shopping-cart-model/sssssq39</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shopping-cart-model/sssssq39"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shopping-cart-model/sssssq39"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shopping-cart-model/sssssq39"/>
      <lastmod>2026-11-02T02:27:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shopping-cart-model/sssssq39</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shopping-cart-model/sssssq39"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shopping-cart-model/sssssq39"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shopping-cart-model/sssssq39"/>
      <lastmod>2026-11-02T02:27:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-with-irrational-sides/sssssq3e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-with-irrational-sides/sssssq3e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-with-irrational-sides/sssssq3e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-with-irrational-sides/sssssq3e"/>
      <lastmod>2026-11-02T02:11:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-with-irrational-sides/sssssq3e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-with-irrational-sides/sssssq3e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-with-irrational-sides/sssssq3e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-with-irrational-sides/sssssq3e"/>
      <lastmod>2026-11-02T02:11:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lucas-spiral-iterative-construction-with-similar-triangles-and-trigonometry/sssssq3v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lucas-spiral-iterative-construction-with-similar-triangles-and-trigonometry/sssssq3v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lucas-spiral-iterative-construction-with-similar-triangles-and-trigonometry/sssssq3v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lucas-spiral-iterative-construction-with-similar-triangles-and-trigonometry/sssssq3v"/>
      <lastmod>2026-11-01T21:58:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lucas-spiral-iterative-construction-with-similar-triangles-and-trigonometry/sssssq3v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lucas-spiral-iterative-construction-with-similar-triangles-and-trigonometry/sssssq3v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lucas-spiral-iterative-construction-with-similar-triangles-and-trigonometry/sssssq3v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lucas-spiral-iterative-construction-with-similar-triangles-and-trigonometry/sssssq3v"/>
      <lastmod>2026-11-01T21:58:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-limit-definition-of-derivative/sssssq34</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-limit-definition-of-derivative/sssssq34"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-limit-definition-of-derivative/sssssq34"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-limit-definition-of-derivative/sssssq34"/>
      <lastmod>2026-11-02T00:08:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-limit-definition-of-derivative/sssssq34</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-limit-definition-of-derivative/sssssq34"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-limit-definition-of-derivative/sssssq34"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-limit-definition-of-derivative/sssssq34"/>
      <lastmod>2026-11-02T00:08:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chemical-elements-and-atomic-radius/sssssq3l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chemical-elements-and-atomic-radius/sssssq3l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chemical-elements-and-atomic-radius/sssssq3l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chemical-elements-and-atomic-radius/sssssq3l"/>
      <lastmod>2026-11-02T18:23:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chemical-elements-and-atomic-radius/sssssq3l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chemical-elements-and-atomic-radius/sssssq3l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chemical-elements-and-atomic-radius/sssssq3l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chemical-elements-and-atomic-radius/sssssq3l"/>
      <lastmod>2026-11-02T18:23:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-representation-of-vectors/sssssq3y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-representation-of-vectors/sssssq3y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-representation-of-vectors/sssssq3y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-representation-of-vectors/sssssq3y"/>
      <lastmod>2026-11-02T09:56:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-representation-of-vectors/sssssq3y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-representation-of-vectors/sssssq3y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-representation-of-vectors/sssssq3y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-representation-of-vectors/sssssq3y"/>
      <lastmod>2026-11-02T09:56:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directional-derivative-demo-by-servando-pineda-carranza/sssssq3a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-servando-pineda-carranza/sssssq3a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivative-demo-by-servando-pineda-carranza/sssssq3a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-servando-pineda-carranza/sssssq3a"/>
      <lastmod>2026-11-01T23:36:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directional-derivative-demo-by-servando-pineda-carranza/sssssq3a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-servando-pineda-carranza/sssssq3a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivative-demo-by-servando-pineda-carranza/sssssq3a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-servando-pineda-carranza/sssssq3a"/>
      <lastmod>2026-11-01T23:36:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-tangent-functions/sssssq3c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-tangent-functions/sssssq3c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-tangent-functions/sssssq3c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-tangent-functions/sssssq3c"/>
      <lastmod>2026-11-02T17:58:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-tangent-functions/sssssq3c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-tangent-functions/sssssq3c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-tangent-functions/sssssq3c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-tangent-functions/sssssq3c"/>
      <lastmod>2026-11-02T17:58:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-of-a-translation/sssssq3r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-of-a-translation/sssssq3r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-of-a-translation/sssssq3r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-of-a-translation/sssssq3r"/>
      <lastmod>2026-11-02T02:46:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-of-a-translation/sssssq3r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-of-a-translation/sssssq3r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-of-a-translation/sssssq3r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-of-a-translation/sssssq3r"/>
      <lastmod>2026-11-02T02:46:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers-practice-by-patrick-chung/sssssq3h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers-practice-by-patrick-chung/sssssq3h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-of-directed-numbers-practice-by-patrick-chung/sssssq3h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers-practice-by-patrick-chung/sssssq3h"/>
      <lastmod>2026-11-01T19:26:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtraction-of-directed-numbers-practice-by-patrick-chung/sssssq3h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers-practice-by-patrick-chung/sssssq3h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-of-directed-numbers-practice-by-patrick-chung/sssssq3h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers-practice-by-patrick-chung/sssssq3h"/>
      <lastmod>2026-11-01T19:26:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sicherman-dice-proof-using-factoring/sssssq3t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sicherman-dice-proof-using-factoring/sssssq3t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sicherman-dice-proof-using-factoring/sssssq3t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sicherman-dice-proof-using-factoring/sssssq3t"/>
      <lastmod>2026-11-01T21:34:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sicherman-dice-proof-using-factoring/sssssq3t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sicherman-dice-proof-using-factoring/sssssq3t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sicherman-dice-proof-using-factoring/sssssq3t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sicherman-dice-proof-using-factoring/sssssq3t"/>
      <lastmod>2026-11-01T21:34:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-one-step-equations-by-adding-or-subtracting/sssssq3x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-one-step-equations-by-adding-or-subtracting/sssssq3x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-one-step-equations-by-adding-or-subtracting/sssssq3x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-one-step-equations-by-adding-or-subtracting/sssssq3x"/>
      <lastmod>2026-11-02T00:30:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-one-step-equations-by-adding-or-subtracting/sssssq3x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-one-step-equations-by-adding-or-subtracting/sssssq3x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-one-step-equations-by-adding-or-subtracting/sssssq3x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-one-step-equations-by-adding-or-subtracting/sssssq3x"/>
      <lastmod>2026-11-02T00:30:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-angle-bisector-incenter-and-triangle-inequality/sssssq3i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-angle-bisector-incenter-and-triangle-inequality/sssssq3i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-angle-bisector-incenter-and-triangle-inequality/sssssq3i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-angle-bisector-incenter-and-triangle-inequality/sssssq3i"/>
      <lastmod>2026-11-01T23:52:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-angle-bisector-incenter-and-triangle-inequality/sssssq3i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-angle-bisector-incenter-and-triangle-inequality/sssssq3i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-angle-bisector-incenter-and-triangle-inequality/sssssq3i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-angle-bisector-incenter-and-triangle-inequality/sssssq3i"/>
      <lastmod>2026-11-01T23:52:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/functions-and-reflection-transformations/sssssq3o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-and-reflection-transformations/sssssq3o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-and-reflection-transformations/sssssq3o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-and-reflection-transformations/sssssq3o"/>
      <lastmod>2026-11-02T17:11:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/functions-and-reflection-transformations/sssssq3o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-and-reflection-transformations/sssssq3o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-and-reflection-transformations/sssssq3o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-and-reflection-transformations/sssssq3o"/>
      <lastmod>2026-11-02T17:11:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-by-accesscd/sssssqqs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-accesscd/sssssqqs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-by-accesscd/sssssqqs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-accesscd/sssssqqs"/>
      <lastmod>2026-11-01T19:10:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-by-accesscd/sssssqqs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-accesscd/sssssqqs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-by-accesscd/sssssqqs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-accesscd/sssssqqs"/>
      <lastmod>2026-11-01T19:10:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identify-the-slope-of-a-line/sssssqq7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-the-slope-of-a-line/sssssqq7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-the-slope-of-a-line/sssssqq7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-the-slope-of-a-line/sssssqq7"/>
      <lastmod>2026-11-01T20:50:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identify-the-slope-of-a-line/sssssqq7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-the-slope-of-a-line/sssssqq7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-the-slope-of-a-line/sssssqq7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-the-slope-of-a-line/sssssqq7"/>
      <lastmod>2026-11-01T20:50:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-area/sssssqqn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-area/sssssqqn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-area/sssssqqn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-area/sssssqqn"/>
      <lastmod>2026-11-01T19:22:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-area/sssssqqn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-area/sssssqqn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-area/sssssqqn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-area/sssssqqn"/>
      <lastmod>2026-11-01T19:22:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-vectors-using-unit-vector-method/sssssqq2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-vectors-using-unit-vector-method/sssssqq2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-vectors-using-unit-vector-method/sssssqq2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-vectors-using-unit-vector-method/sssssqq2"/>
      <lastmod>2026-11-01T21:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-vectors-using-unit-vector-method/sssssqq2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-vectors-using-unit-vector-method/sssssqq2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-vectors-using-unit-vector-method/sssssqq2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-vectors-using-unit-vector-method/sssssqq2"/>
      <lastmod>2026-11-01T21:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustrations-of-polygon-angle-sum-theorems/sssssqqk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustrations-of-polygon-angle-sum-theorems/sssssqqk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustrations-of-polygon-angle-sum-theorems/sssssqqk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustrations-of-polygon-angle-sum-theorems/sssssqqk"/>
      <lastmod>2026-11-01T21:06:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustrations-of-polygon-angle-sum-theorems/sssssqqk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustrations-of-polygon-angle-sum-theorems/sssssqqk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustrations-of-polygon-angle-sum-theorems/sssssqqk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustrations-of-polygon-angle-sum-theorems/sssssqqk"/>
      <lastmod>2026-11-01T21:06:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/studies-on-incircles/sssssqqz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/studies-on-incircles/sssssqqz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/studies-on-incircles/sssssqqz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/studies-on-incircles/sssssqqz"/>
      <lastmod>2026-11-02T18:19:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/studies-on-incircles/sssssqqz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/studies-on-incircles/sssssqqz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/studies-on-incircles/sssssqqz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/studies-on-incircles/sssssqqz"/>
      <lastmod>2026-11-02T18:19:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-practice-2/sssssqq0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-practice-2/sssssqq0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-practice-2/sssssqq0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-practice-2/sssssqq0"/>
      <lastmod>2026-11-02T18:16:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-practice-2/sssssqq0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-practice-2/sssssqq0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-practice-2/sssssqq0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-practice-2/sssssqq0"/>
      <lastmod>2026-11-02T18:16:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logo-sena-eco-plastics-math-example/sssssqqd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-sena-eco-plastics-math-example/sssssqqd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-sena-eco-plastics-math-example/sssssqqd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-sena-eco-plastics-math-example/sssssqqd"/>
      <lastmod>2026-11-01T21:31:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logo-sena-eco-plastics-math-example/sssssqqd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-sena-eco-plastics-math-example/sssssqqd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-sena-eco-plastics-math-example/sssssqqd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-sena-eco-plastics-math-example/sssssqqd"/>
      <lastmod>2026-11-01T21:31:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sample-sizes-for-estimating-population-proportion/sssssqqf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-sizes-for-estimating-population-proportion/sssssqqf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-sizes-for-estimating-population-proportion/sssssqqf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-sizes-for-estimating-population-proportion/sssssqqf"/>
      <lastmod>2026-11-02T00:18:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sample-sizes-for-estimating-population-proportion/sssssqqf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-sizes-for-estimating-population-proportion/sssssqqf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-sizes-for-estimating-population-proportion/sssssqqf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-sizes-for-estimating-population-proportion/sssssqqf"/>
      <lastmod>2026-11-02T00:18:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-dot-diagram-mean-median-illustration/sssssqq8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-dot-diagram-mean-median-illustration/sssssqq8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-dot-diagram-mean-median-illustration/sssssqq8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-dot-diagram-mean-median-illustration/sssssqq8"/>
      <lastmod>2026-11-01T21:04:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-dot-diagram-mean-median-illustration/sssssqq8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-dot-diagram-mean-median-illustration/sssssqq8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-dot-diagram-mean-median-illustration/sssssqq8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-dot-diagram-mean-median-illustration/sssssqq8"/>
      <lastmod>2026-11-01T21:04:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-motion-in-two-dimensions/sssssqqu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-motion-in-two-dimensions/sssssqqu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-motion-in-two-dimensions/sssssqqu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-motion-in-two-dimensions/sssssqqu"/>
      <lastmod>2026-11-01T23:50:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-motion-in-two-dimensions/sssssqqu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-motion-in-two-dimensions/sssssqqu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-motion-in-two-dimensions/sssssqqu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-motion-in-two-dimensions/sssssqqu"/>
      <lastmod>2026-11-01T23:50:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-of-parametric-curve/sssssqq5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-of-parametric-curve/sssssqq5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-of-parametric-curve/sssssqq5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-of-parametric-curve/sssssqq5"/>
      <lastmod>2026-11-02T17:51:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-of-parametric-curve/sssssqq5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-of-parametric-curve/sssssqq5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-of-parametric-curve/sssssqq5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-of-parametric-curve/sssssqq5"/>
      <lastmod>2026-11-02T17:51:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolas-by-kok-wai-keong/sssssqqb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas-by-kok-wai-keong/sssssqqb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas-by-kok-wai-keong/sssssqqb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas-by-kok-wai-keong/sssssqqb"/>
      <lastmod>2026-11-02T03:13:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabolas-by-kok-wai-keong/sssssqqb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas-by-kok-wai-keong/sssssqqb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas-by-kok-wai-keong/sssssqqb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas-by-kok-wai-keong/sssssqqb"/>
      <lastmod>2026-11-02T03:13:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-inequalities-by-ashmita/sssssqq3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequalities-by-ashmita/sssssqq3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequalities-by-ashmita/sssssqq3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequalities-by-ashmita/sssssqq3"/>
      <lastmod>2026-11-02T03:09:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-inequalities-by-ashmita/sssssqq3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequalities-by-ashmita/sssssqq3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequalities-by-ashmita/sssssqq3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequalities-by-ashmita/sssssqq3"/>
      <lastmod>2026-11-02T03:09:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inconsistent-3x3-linear-system-no-solution/sssssqqq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inconsistent-3x3-linear-system-no-solution/sssssqqq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inconsistent-3x3-linear-system-no-solution/sssssqqq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inconsistent-3x3-linear-system-no-solution/sssssqqq"/>
      <lastmod>2026-11-01T21:28:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inconsistent-3x3-linear-system-no-solution/sssssqqq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inconsistent-3x3-linear-system-no-solution/sssssqqq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inconsistent-3x3-linear-system-no-solution/sssssqqq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inconsistent-3x3-linear-system-no-solution/sssssqqq"/>
      <lastmod>2026-11-01T21:28:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/undamped-forced-oscillations/sssssqq1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/undamped-forced-oscillations/sssssqq1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/undamped-forced-oscillations/sssssqq1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/undamped-forced-oscillations/sssssqq1"/>
      <lastmod>2026-11-02T13:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/undamped-forced-oscillations/sssssqq1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/undamped-forced-oscillations/sssssqq1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/undamped-forced-oscillations/sssssqq1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/undamped-forced-oscillations/sssssqq1"/>
      <lastmod>2026-11-02T13:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-the-properties-of-an-isosceles-trapezoid/sssssqqm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-the-properties-of-an-isosceles-trapezoid/sssssqqm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-the-properties-of-an-isosceles-trapezoid/sssssqqm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-the-properties-of-an-isosceles-trapezoid/sssssqqm"/>
      <lastmod>2026-11-02T18:49:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-the-properties-of-an-isosceles-trapezoid/sssssqqm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-the-properties-of-an-isosceles-trapezoid/sssssqqm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-the-properties-of-an-isosceles-trapezoid/sssssqqm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-the-properties-of-an-isosceles-trapezoid/sssssqqm"/>
      <lastmod>2026-11-02T18:49:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/christmas-tree/sssssqqj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/christmas-tree/sssssqqj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/christmas-tree/sssssqqj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/christmas-tree/sssssqqj"/>
      <lastmod>2026-11-01T21:05:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/christmas-tree/sssssqqj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/christmas-tree/sssssqqj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/christmas-tree/sssssqqj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/christmas-tree/sssssqqj"/>
      <lastmod>2026-11-01T21:05:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-with-division-1-digit-divisor/sssssqqp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-with-division-1-digit-divisor/sssssqqp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-with-division-1-digit-divisor/sssssqqp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-with-division-1-digit-divisor/sssssqqp"/>
      <lastmod>2026-11-01T19:19:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-with-division-1-digit-divisor/sssssqqp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-with-division-1-digit-divisor/sssssqqp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-with-division-1-digit-divisor/sssssqqp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-with-division-1-digit-divisor/sssssqqp"/>
      <lastmod>2026-11-01T19:19:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimate-the-number-of-darts/sssssqqw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimate-the-number-of-darts/sssssqqw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimate-the-number-of-darts/sssssqqw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimate-the-number-of-darts/sssssqqw"/>
      <lastmod>2026-11-02T02:26:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimate-the-number-of-darts/sssssqqw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimate-the-number-of-darts/sssssqqw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimate-the-number-of-darts/sssssqqw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimate-the-number-of-darts/sssssqqw"/>
      <lastmod>2026-11-02T02:26:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagonal-prism-net-by-eduardo-neto/sssssqq6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-prism-net-by-eduardo-neto/sssssqq6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-prism-net-by-eduardo-neto/sssssqq6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-prism-net-by-eduardo-neto/sssssqq6"/>
      <lastmod>2026-11-02T15:03:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagonal-prism-net-by-eduardo-neto/sssssqq6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-prism-net-by-eduardo-neto/sssssqq6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-prism-net-by-eduardo-neto/sssssqq6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-prism-net-by-eduardo-neto/sssssqq6"/>
      <lastmod>2026-11-02T15:03:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-sss-congruence/sssssqqg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-sss-congruence/sssssqqg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-sss-congruence/sssssqqg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-sss-congruence/sssssqqg"/>
      <lastmod>2026-11-02T06:34:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-sss-congruence/sssssqqg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-sss-congruence/sssssqqg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-sss-congruence/sssssqqg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-sss-congruence/sssssqqg"/>
      <lastmod>2026-11-02T06:34:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-trapezoid-by-solimaa6/sssssqq9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-trapezoid-by-solimaa6/sssssqq9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-trapezoid-by-solimaa6/sssssqq9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-trapezoid-by-solimaa6/sssssqq9"/>
      <lastmod>2026-11-02T18:21:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-trapezoid-by-solimaa6/sssssqq9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-trapezoid-by-solimaa6/sssssqq9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-trapezoid-by-solimaa6/sssssqq9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-trapezoid-by-solimaa6/sssssqq9"/>
      <lastmod>2026-11-02T18:21:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-2/sssssqqe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-2/sssssqqe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-2/sssssqqe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-2/sssssqqe"/>
      <lastmod>2026-11-01T21:54:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-2/sssssqqe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-2/sssssqqe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-2/sssssqqe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-2/sssssqqe"/>
      <lastmod>2026-11-01T21:54:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-geogebra-team/sssssqqv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-geogebra-team/sssssqqv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-inequalities-by-geogebra-team/sssssqqv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-geogebra-team/sssssqqv"/>
      <lastmod>2026-11-01T22:08:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-inequalities-by-geogebra-team/sssssqqv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-geogebra-team/sssssqqv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-inequalities-by-geogebra-team/sssssqqv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-by-geogebra-team/sssssqqv"/>
      <lastmod>2026-11-01T22:08:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-by-jila/sssssqq4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-jila/sssssqq4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-jila/sssssqq4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-jila/sssssqq4"/>
      <lastmod>2026-11-02T18:53:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-by-jila/sssssqq4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-jila/sssssqq4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-jila/sssssqq4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-jila/sssssqq4"/>
      <lastmod>2026-11-02T18:53:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximation/sssssqql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximation/sssssqql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-planes-and-linear-approximation/sssssqql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximation/sssssqql"/>
      <lastmod>2026-11-02T18:28:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-planes-and-linear-approximation/sssssqql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximation/sssssqql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-planes-and-linear-approximation/sssssqql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximation/sssssqql"/>
      <lastmod>2026-11-02T18:28:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-integer-addition-commutativity-cueba0024/sssssqqy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-integer-addition-commutativity-cueba0024/sssssqqy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-integer-addition-commutativity-cueba0024/sssssqqy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-integer-addition-commutativity-cueba0024/sssssqqy"/>
      <lastmod>2026-11-02T08:34:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-integer-addition-commutativity-cueba0024/sssssqqy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-integer-addition-commutativity-cueba0024/sssssqqy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-integer-addition-commutativity-cueba0024/sssssqqy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-integer-addition-commutativity-cueba0024/sssssqqy"/>
      <lastmod>2026-11-02T08:34:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-geometric-construction/sssssqqa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-geometric-construction/sssssqqa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-geometric-construction/sssssqqa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-geometric-construction/sssssqqa"/>
      <lastmod>2026-11-01T21:16:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-geometric-construction/sssssqqa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-geometric-construction/sssssqqa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-geometric-construction/sssssqqa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-geometric-construction/sssssqqa"/>
      <lastmod>2026-11-01T21:16:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-function-graph-by-imyanwong/sssssqqc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-graph-by-imyanwong/sssssqqc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-graph-by-imyanwong/sssssqqc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-graph-by-imyanwong/sssssqqc"/>
      <lastmod>2026-11-01T21:12:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-function-graph-by-imyanwong/sssssqqc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-graph-by-imyanwong/sssssqqc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-graph-by-imyanwong/sssssqqc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-graph-by-imyanwong/sssssqqc"/>
      <lastmod>2026-11-01T21:12:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-by-emily-young/sssssqqr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-by-emily-young/sssssqqr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-graph-by-emily-young/sssssqqr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-by-emily-young/sssssqqr"/>
      <lastmod>2026-11-02T14:52:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-sine-graph-by-emily-young/sssssqqr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-by-emily-young/sssssqqr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-graph-by-emily-young/sssssqqr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-by-emily-young/sssssqqr"/>
      <lastmod>2026-11-02T14:52:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-perpendicular-bisector-dynamic-exploration/sssssqqh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-perpendicular-bisector-dynamic-exploration/sssssqqh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-perpendicular-bisector-dynamic-exploration/sssssqqh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-perpendicular-bisector-dynamic-exploration/sssssqqh"/>
      <lastmod>2026-11-02T17:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-perpendicular-bisector-dynamic-exploration/sssssqqh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-perpendicular-bisector-dynamic-exploration/sssssqqh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-perpendicular-bisector-dynamic-exploration/sssssqqh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-perpendicular-bisector-dynamic-exploration/sssssqqh"/>
      <lastmod>2026-11-02T17:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discriminant-nature-of-roots/sssssqqt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discriminant-nature-of-roots/sssssqqt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discriminant-nature-of-roots/sssssqqt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discriminant-nature-of-roots/sssssqqt"/>
      <lastmod>2026-11-02T17:45:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discriminant-nature-of-roots/sssssqqt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discriminant-nature-of-roots/sssssqqt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discriminant-nature-of-roots/sssssqqt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discriminant-nature-of-roots/sssssqqt"/>
      <lastmod>2026-11-02T17:45:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/incircle-and-polygon-relationship-demo/sssssqqx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-and-polygon-relationship-demo/sssssqqx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-and-polygon-relationship-demo/sssssqqx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-and-polygon-relationship-demo/sssssqqx"/>
      <lastmod>2026-11-02T18:02:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/incircle-and-polygon-relationship-demo/sssssqqx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-and-polygon-relationship-demo/sssssqqx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-and-polygon-relationship-demo/sssssqqx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-and-polygon-relationship-demo/sssssqqx"/>
      <lastmod>2026-11-02T18:02:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-bisector-construction-by-kirk-culler/sssssqqi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-bisector-construction-by-kirk-culler/sssssqqi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-bisector-construction-by-kirk-culler/sssssqqi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-bisector-construction-by-kirk-culler/sssssqqi"/>
      <lastmod>2026-11-02T12:47:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/segment-bisector-construction-by-kirk-culler/sssssqqi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-bisector-construction-by-kirk-culler/sssssqqi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-bisector-construction-by-kirk-culler/sssssqqi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-bisector-construction-by-kirk-culler/sssssqqi"/>
      <lastmod>2026-11-02T12:47:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-of-an-equilateral-triangle/sssssqqo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-an-equilateral-triangle/sssssqqo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-an-equilateral-triangle/sssssqqo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-an-equilateral-triangle/sssssqqo"/>
      <lastmod>2026-11-01T23:38:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-of-an-equilateral-triangle/sssssqqo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-an-equilateral-triangle/sssssqqo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-an-equilateral-triangle/sssssqqo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-an-equilateral-triangle/sssssqqo"/>
      <lastmod>2026-11-01T23:38:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-dynamic-construction-for-geometric-center-study/sssssq1s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-dynamic-construction-for-geometric-center-study/sssssq1s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-dynamic-construction-for-geometric-center-study/sssssq1s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-dynamic-construction-for-geometric-center-study/sssssq1s"/>
      <lastmod>2026-11-02T02:34:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-dynamic-construction-for-geometric-center-study/sssssq1s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-dynamic-construction-for-geometric-center-study/sssssq1s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-dynamic-construction-for-geometric-center-study/sssssq1s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-dynamic-construction-for-geometric-center-study/sssssq1s"/>
      <lastmod>2026-11-02T02:34:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modifiable-solid-square-cross-sections-parallel-to-yaxis/sssssq17</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-square-cross-sections-parallel-to-yaxis/sssssq17"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-square-cross-sections-parallel-to-yaxis/sssssq17"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-square-cross-sections-parallel-to-yaxis/sssssq17"/>
      <lastmod>2026-11-02T02:34:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modifiable-solid-square-cross-sections-parallel-to-yaxis/sssssq17</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-square-cross-sections-parallel-to-yaxis/sssssq17"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-square-cross-sections-parallel-to-yaxis/sssssq17"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-square-cross-sections-parallel-to-yaxis/sssssq17"/>
      <lastmod>2026-11-02T02:34:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-predictions/sssssq1n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-predictions/sssssq1n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-predictions/sssssq1n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-predictions/sssssq1n"/>
      <lastmod>2026-11-02T09:07:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-predictions/sssssq1n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-predictions/sssssq1n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-predictions/sssssq1n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-predictions/sssssq1n"/>
      <lastmod>2026-11-02T09:07:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mr-kopeckey-s-3d-cross-product-calculator/sssssq12</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mr-kopeckey-s-3d-cross-product-calculator/sssssq12"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mr-kopeckey-s-3d-cross-product-calculator/sssssq12"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mr-kopeckey-s-3d-cross-product-calculator/sssssq12"/>
      <lastmod>2026-11-01T20:49:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mr-kopeckey-s-3d-cross-product-calculator/sssssq12</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mr-kopeckey-s-3d-cross-product-calculator/sssssq12"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mr-kopeckey-s-3d-cross-product-calculator/sssssq12"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mr-kopeckey-s-3d-cross-product-calculator/sssssq12"/>
      <lastmod>2026-11-01T20:49:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapez-surface-demo/sssssq1k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapez-surface-demo/sssssq1k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapez-surface-demo/sssssq1k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapez-surface-demo/sssssq1k"/>
      <lastmod>2026-11-02T12:26:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapez-surface-demo/sssssq1k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapez-surface-demo/sssssq1k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapez-surface-demo/sssssq1k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapez-surface-demo/sssssq1k"/>
      <lastmod>2026-11-02T12:26:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/writing-linear-equations-by-shaira-reynaldo/sssssq1z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-linear-equations-by-shaira-reynaldo/sssssq1z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-linear-equations-by-shaira-reynaldo/sssssq1z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-linear-equations-by-shaira-reynaldo/sssssq1z"/>
      <lastmod>2026-11-01T21:20:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/writing-linear-equations-by-shaira-reynaldo/sssssq1z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-linear-equations-by-shaira-reynaldo/sssssq1z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-linear-equations-by-shaira-reynaldo/sssssq1z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-linear-equations-by-shaira-reynaldo/sssssq1z"/>
      <lastmod>2026-11-01T21:20:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/types-of-a-triangle-equilateral-isosceles-right-and-scalene/sssssq10</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/types-of-a-triangle-equilateral-isosceles-right-and-scalene/sssssq10"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/types-of-a-triangle-equilateral-isosceles-right-and-scalene/sssssq10"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/types-of-a-triangle-equilateral-isosceles-right-and-scalene/sssssq10"/>
      <lastmod>2026-11-01T20:53:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/types-of-a-triangle-equilateral-isosceles-right-and-scalene/sssssq10</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/types-of-a-triangle-equilateral-isosceles-right-and-scalene/sssssq10"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/types-of-a-triangle-equilateral-isosceles-right-and-scalene/sssssq10"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/types-of-a-triangle-equilateral-isosceles-right-and-scalene/sssssq10"/>
      <lastmod>2026-11-01T20:53:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-paraboloid/sssssq1d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-paraboloid/sssssq1d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cylinder-and-paraboloid/sssssq1d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-paraboloid/sssssq1d"/>
      <lastmod>2026-11-02T13:02:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-cylinder-and-paraboloid/sssssq1d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-paraboloid/sssssq1d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cylinder-and-paraboloid/sssssq1d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-paraboloid/sssssq1d"/>
      <lastmod>2026-11-02T13:02:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersections-and-stochastic-process-demo/sssssq1f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersections-and-stochastic-process-demo/sssssq1f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersections-and-stochastic-process-demo/sssssq1f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersections-and-stochastic-process-demo/sssssq1f"/>
      <lastmod>2026-11-01T23:54:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersections-and-stochastic-process-demo/sssssq1f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersections-and-stochastic-process-demo/sssssq1f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersections-and-stochastic-process-demo/sssssq1f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersections-and-stochastic-process-demo/sssssq1f"/>
      <lastmod>2026-11-01T23:54:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-mean-construction-by-tim-brzezinski/sssssq18</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-construction-by-tim-brzezinski/sssssq18"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-construction-by-tim-brzezinski/sssssq18"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-construction-by-tim-brzezinski/sssssq18"/>
      <lastmod>2026-11-02T12:00:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-mean-construction-by-tim-brzezinski/sssssq18</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-construction-by-tim-brzezinski/sssssq18"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-construction-by-tim-brzezinski/sssssq18"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-construction-by-tim-brzezinski/sssssq18"/>
      <lastmod>2026-11-02T12:00:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similarity-transformation-and-kite-curve-sketching-exercise-hebrew-example/sssssq1u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-kite-curve-sketching-exercise-hebrew-example/sssssq1u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-and-kite-curve-sketching-exercise-hebrew-example/sssssq1u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-kite-curve-sketching-exercise-hebrew-example/sssssq1u"/>
      <lastmod>2026-11-02T18:05:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similarity-transformation-and-kite-curve-sketching-exercise-hebrew-example/sssssq1u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-kite-curve-sketching-exercise-hebrew-example/sssssq1u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-and-kite-curve-sketching-exercise-hebrew-example/sssssq1u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-kite-curve-sketching-exercise-hebrew-example/sssssq1u"/>
      <lastmod>2026-11-02T18:05:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/free-ice-cream-mathematical-construction/sssssq15</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/free-ice-cream-mathematical-construction/sssssq15"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/free-ice-cream-mathematical-construction/sssssq15"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/free-ice-cream-mathematical-construction/sssssq15"/>
      <lastmod>2026-11-02T17:03:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/free-ice-cream-mathematical-construction/sssssq15</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/free-ice-cream-mathematical-construction/sssssq15"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/free-ice-cream-mathematical-construction/sssssq15"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/free-ice-cream-mathematical-construction/sssssq15"/>
      <lastmod>2026-11-02T17:03:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/toolbox-by-step/sssssq1b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/toolbox-by-step/sssssq1b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/toolbox-by-step/sssssq1b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/toolbox-by-step/sssssq1b"/>
      <lastmod>2026-11-02T18:55:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/toolbox-by-step/sssssq1b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/toolbox-by-step/sssssq1b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/toolbox-by-step/sssssq1b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/toolbox-by-step/sssssq1b"/>
      <lastmod>2026-11-02T18:55:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagon-volume-calculation-demo/sssssq13</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-volume-calculation-demo/sssssq13"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-volume-calculation-demo/sssssq13"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-volume-calculation-demo/sssssq13"/>
      <lastmod>2026-11-02T18:36:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagon-volume-calculation-demo/sssssq13</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-volume-calculation-demo/sssssq13"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-volume-calculation-demo/sssssq13"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-volume-calculation-demo/sssssq13"/>
      <lastmod>2026-11-02T18:36:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-and-volume-using-parametric-curves/sssssq1q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-volume-using-parametric-curves/sssssq1q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-volume-using-parametric-curves/sssssq1q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-volume-using-parametric-curves/sssssq1q"/>
      <lastmod>2026-11-02T18:01:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-and-volume-using-parametric-curves/sssssq1q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-volume-using-parametric-curves/sssssq1q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-volume-using-parametric-curves/sssssq1q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-volume-using-parametric-curves/sssssq1q"/>
      <lastmod>2026-11-02T18:01:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-line-perpendicular-to-a-plane/sssssq11</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-line-perpendicular-to-a-plane/sssssq11"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-line-perpendicular-to-a-plane/sssssq11"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-line-perpendicular-to-a-plane/sssssq11"/>
      <lastmod>2026-11-02T18:07:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-line-perpendicular-to-a-plane/sssssq11</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-line-perpendicular-to-a-plane/sssssq11"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-line-perpendicular-to-a-plane/sssssq11"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-line-perpendicular-to-a-plane/sssssq11"/>
      <lastmod>2026-11-02T18:07:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-construction-by-peter-myers/sssssq1m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-peter-myers/sssssq1m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-by-peter-myers/sssssq1m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-peter-myers/sssssq1m"/>
      <lastmod>2026-11-01T23:14:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-construction-by-peter-myers/sssssq1m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-peter-myers/sssssq1m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-by-peter-myers/sssssq1m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-peter-myers/sssssq1m"/>
      <lastmod>2026-11-01T23:14:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-x-2-1-2/sssssq1j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-x-2-1-2/sssssq1j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-x-2-1-2/sssssq1j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-x-2-1-2/sssssq1j"/>
      <lastmod>2026-11-02T00:57:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-x-2-1-2/sssssq1j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-x-2-1-2/sssssq1j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-x-2-1-2/sssssq1j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-x-2-1-2/sssssq1j"/>
      <lastmod>2026-11-02T00:57:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-element-in-cylindrical-coordinates/sssssq1p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-element-in-cylindrical-coordinates/sssssq1p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-element-in-cylindrical-coordinates/sssssq1p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-element-in-cylindrical-coordinates/sssssq1p"/>
      <lastmod>2026-11-02T09:27:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-element-in-cylindrical-coordinates/sssssq1p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-element-in-cylindrical-coordinates/sssssq1p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-element-in-cylindrical-coordinates/sssssq1p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-element-in-cylindrical-coordinates/sssssq1p"/>
      <lastmod>2026-11-02T09:27:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagoras-semicircles-and-lunes-lesson-exploration/sssssq1w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-semicircles-and-lunes-lesson-exploration/sssssq1w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-semicircles-and-lunes-lesson-exploration/sssssq1w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-semicircles-and-lunes-lesson-exploration/sssssq1w"/>
      <lastmod>2026-11-01T23:13:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagoras-semicircles-and-lunes-lesson-exploration/sssssq1w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-semicircles-and-lunes-lesson-exploration/sssssq1w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-semicircles-and-lunes-lesson-exploration/sssssq1w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-semicircles-and-lunes-lesson-exploration/sssssq1w"/>
      <lastmod>2026-11-01T23:13:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-graphs-of-linear-equations-in-2-unknowns/sssssq16</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-graphs-of-linear-equations-in-2-unknowns/sssssq16"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-graphs-of-linear-equations-in-2-unknowns/sssssq16"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-graphs-of-linear-equations-in-2-unknowns/sssssq16"/>
      <lastmod>2026-11-02T12:01:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-graphs-of-linear-equations-in-2-unknowns/sssssq16</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-graphs-of-linear-equations-in-2-unknowns/sssssq16"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-graphs-of-linear-equations-in-2-unknowns/sssssq16"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-graphs-of-linear-equations-in-2-unknowns/sssssq16"/>
      <lastmod>2026-11-02T12:01:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-demo/sssssq1g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demo/sssssq1g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-demo/sssssq1g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demo/sssssq1g"/>
      <lastmod>2026-11-01T19:30:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-demo/sssssq1g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demo/sssssq1g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-demo/sssssq1g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demo/sssssq1g"/>
      <lastmod>2026-11-01T19:30:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-simultaneous-linear-equations-in-two-unknowns-by-graphical-method/sssssq19</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-simultaneous-linear-equations-in-two-unknowns-by-graphical-method/sssssq19"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-simultaneous-linear-equations-in-two-unknowns-by-graphical-method/sssssq19"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-simultaneous-linear-equations-in-two-unknowns-by-graphical-method/sssssq19"/>
      <lastmod>2026-11-01T19:17:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-simultaneous-linear-equations-in-two-unknowns-by-graphical-method/sssssq19</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-simultaneous-linear-equations-in-two-unknowns-by-graphical-method/sssssq19"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-simultaneous-linear-equations-in-two-unknowns-by-graphical-method/sssssq19"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-simultaneous-linear-equations-in-two-unknowns-by-graphical-method/sssssq19"/>
      <lastmod>2026-11-01T19:17:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-graphs/sssssq1e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-graphs/sssssq1e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-graphs/sssssq1e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-graphs/sssssq1e"/>
      <lastmod>2026-11-02T13:15:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-graphs/sssssq1e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-graphs/sssssq1e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-graphs/sssssq1e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-graphs/sssssq1e"/>
      <lastmod>2026-11-02T13:15:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-pyramids-interactive-exploration-of-sequences-linear-equations-and-geo/sssssq1v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-pyramids-interactive-exploration-of-sequences-linear-equations-and-geo/sssssq1v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-pyramids-interactive-exploration-of-sequences-linear-equations-and-geo/sssssq1v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-pyramids-interactive-exploration-of-sequences-linear-equations-and-geo/sssssq1v"/>
      <lastmod>2026-11-02T00:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-pyramids-interactive-exploration-of-sequences-linear-equations-and-geo/sssssq1v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-pyramids-interactive-exploration-of-sequences-linear-equations-and-geo/sssssq1v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-pyramids-interactive-exploration-of-sequences-linear-equations-and-geo/sssssq1v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-pyramids-interactive-exploration-of-sequences-linear-equations-and-geo/sssssq1v"/>
      <lastmod>2026-11-02T00:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/harmonic-motion-with-damping/sssssq14</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harmonic-motion-with-damping/sssssq14"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harmonic-motion-with-damping/sssssq14"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harmonic-motion-with-damping/sssssq14"/>
      <lastmod>2026-11-01T19:20:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/harmonic-motion-with-damping/sssssq14</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harmonic-motion-with-damping/sssssq14"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harmonic-motion-with-damping/sssssq14"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harmonic-motion-with-damping/sssssq14"/>
      <lastmod>2026-11-01T19:20:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-cosine-and-tangent/sssssq1l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-and-tangent/sssssq1l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-cosine-and-tangent/sssssq1l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-cosine-and-tangent/sssssq1l"/>
      <lastmod>2026-11-02T11:45:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-cosine-and-tangent/sssssq1l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-and-tangent/sssssq1l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-cosine-and-tangent/sssssq1l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-cosine-and-tangent/sssssq1l"/>
      <lastmod>2026-11-02T11:45:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trig-ratios-quiz-5-triangles/sssssq1y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-ratios-quiz-5-triangles/sssssq1y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-ratios-quiz-5-triangles/sssssq1y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-ratios-quiz-5-triangles/sssssq1y"/>
      <lastmod>2026-11-01T23:26:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trig-ratios-quiz-5-triangles/sssssq1y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-ratios-quiz-5-triangles/sssssq1y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-ratios-quiz-5-triangles/sssssq1y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-ratios-quiz-5-triangles/sssssq1y"/>
      <lastmod>2026-11-01T23:26:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-translation/sssssq1a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-translation/sssssq1a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-translation/sssssq1a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-translation/sssssq1a"/>
      <lastmod>2026-11-01T23:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-translation/sssssq1a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-translation/sssssq1a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-translation/sssssq1a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-translation/sssssq1a"/>
      <lastmod>2026-11-01T23:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-an-integer-by-a-fraction/sssssq1c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-an-integer-by-a-fraction/sssssq1c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-an-integer-by-a-fraction/sssssq1c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-an-integer-by-a-fraction/sssssq1c"/>
      <lastmod>2026-11-02T18:54:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-an-integer-by-a-fraction/sssssq1c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-an-integer-by-a-fraction/sssssq1c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-an-integer-by-a-fraction/sssssq1c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-an-integer-by-a-fraction/sssssq1c"/>
      <lastmod>2026-11-02T18:54:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-circle-sectors/sssssq1r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-circle-sectors/sssssq1r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-circle-sectors/sssssq1r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-circle-sectors/sssssq1r"/>
      <lastmod>2026-11-02T16:33:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-circle-sectors/sssssq1r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-circle-sectors/sssssq1r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-circle-sectors/sssssq1r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-circle-sectors/sssssq1r"/>
      <lastmod>2026-11-02T16:33:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/left-tailed-z-test-demonstration/sssssq1h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/left-tailed-z-test-demonstration/sssssq1h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/left-tailed-z-test-demonstration/sssssq1h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/left-tailed-z-test-demonstration/sssssq1h"/>
      <lastmod>2026-11-02T16:29:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/left-tailed-z-test-demonstration/sssssq1h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/left-tailed-z-test-demonstration/sssssq1h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/left-tailed-z-test-demonstration/sssssq1h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/left-tailed-z-test-demonstration/sssssq1h"/>
      <lastmod>2026-11-02T16:29:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/generalized-logistic-differential-equation/sssssq1t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generalized-logistic-differential-equation/sssssq1t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generalized-logistic-differential-equation/sssssq1t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generalized-logistic-differential-equation/sssssq1t"/>
      <lastmod>2026-11-01T19:04:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/generalized-logistic-differential-equation/sssssq1t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generalized-logistic-differential-equation/sssssq1t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generalized-logistic-differential-equation/sssssq1t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generalized-logistic-differential-equation/sssssq1t"/>
      <lastmod>2026-11-01T19:04:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-functions-by-cemccourseware/sssssq1x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-functions-by-cemccourseware/sssssq1x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-sine-and-cosine-functions-by-cemccourseware/sssssq1x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-functions-by-cemccourseware/sssssq1x"/>
      <lastmod>2026-11-02T18:27:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-sine-and-cosine-functions-by-cemccourseware/sssssq1x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-functions-by-cemccourseware/sssssq1x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-sine-and-cosine-functions-by-cemccourseware/sssssq1x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-functions-by-cemccourseware/sssssq1x"/>
      <lastmod>2026-11-02T18:27:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-graphs-of-sine-cosine-functions/sssssq1i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphs-of-sine-cosine-functions/sssssq1i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphs-of-sine-cosine-functions/sssssq1i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphs-of-sine-cosine-functions/sssssq1i"/>
      <lastmod>2026-11-02T16:42:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-graphs-of-sine-cosine-functions/sssssq1i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphs-of-sine-cosine-functions/sssssq1i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphs-of-sine-cosine-functions/sssssq1i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphs-of-sine-cosine-functions/sssssq1i"/>
      <lastmod>2026-11-02T16:42:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-vector-addition/sssssq1o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-vector-addition/sssssq1o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-vector-addition/sssssq1o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-vector-addition/sssssq1o"/>
      <lastmod>2026-11-02T12:26:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-vector-addition/sssssq1o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-vector-addition/sssssq1o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-vector-addition/sssssq1o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-vector-addition/sssssq1o"/>
      <lastmod>2026-11-02T12:26:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-mean-value-theorem-for-integral-and-its-proofs/sssssqms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-mean-value-theorem-for-integral-and-its-proofs/sssssqms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-mean-value-theorem-for-integral-and-its-proofs/sssssqms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-mean-value-theorem-for-integral-and-its-proofs/sssssqms"/>
      <lastmod>2026-11-02T18:30:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-mean-value-theorem-for-integral-and-its-proofs/sssssqms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-mean-value-theorem-for-integral-and-its-proofs/sssssqms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-mean-value-theorem-for-integral-and-its-proofs/sssssqms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-mean-value-theorem-for-integral-and-its-proofs/sssssqms"/>
      <lastmod>2026-11-02T18:30:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/deriving-the-area-of-a-triangle/sssssqm7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-the-area-of-a-triangle/sssssqm7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-the-area-of-a-triangle/sssssqm7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-the-area-of-a-triangle/sssssqm7"/>
      <lastmod>2026-11-01T19:06:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/deriving-the-area-of-a-triangle/sssssqm7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-the-area-of-a-triangle/sssssqm7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-the-area-of-a-triangle/sssssqm7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-the-area-of-a-triangle/sssssqm7"/>
      <lastmod>2026-11-01T19:06:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-equations-two-perspectives/sssssqmn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-two-perspectives/sssssqmn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-two-perspectives/sssssqmn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-two-perspectives/sssssqmn"/>
      <lastmod>2026-11-02T18:30:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-equations-two-perspectives/sssssqmn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-two-perspectives/sssssqmn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-two-perspectives/sssssqmn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-two-perspectives/sssssqmn"/>
      <lastmod>2026-11-02T18:30:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-equations-of-the-form-ax-b-c-sssssvpa/sssssqm2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-of-the-form-ax-b-c-sssssvpa/sssssqm2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-of-the-form-ax-b-c-sssssvpa/sssssqm2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-of-the-form-ax-b-c-sssssvpa/sssssqm2"/>
      <lastmod>2026-11-02T16:33:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-equations-of-the-form-ax-b-c-sssssvpa/sssssqm2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-of-the-form-ax-b-c-sssssvpa/sssssqm2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-of-the-form-ax-b-c-sssssvpa/sssssqm2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-of-the-form-ax-b-c-sssssvpa/sssssqm2"/>
      <lastmod>2026-11-02T16:33:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-similar-triangles/sssssqmk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-similar-triangles/sssssqmk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-similar-triangles/sssssqmk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-similar-triangles/sssssqmk"/>
      <lastmod>2026-11-02T00:14:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-similar-triangles/sssssqmk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-similar-triangles/sssssqmk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-similar-triangles/sssssqmk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-similar-triangles/sssssqmk"/>
      <lastmod>2026-11-02T00:14:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-intersection-and-union-of-two-sets/sssssqmz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-intersection-and-union-of-two-sets/sssssqmz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-intersection-and-union-of-two-sets/sssssqmz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-intersection-and-union-of-two-sets/sssssqmz"/>
      <lastmod>2026-11-02T00:31:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-intersection-and-union-of-two-sets/sssssqmz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-intersection-and-union-of-two-sets/sssssqmz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-intersection-and-union-of-two-sets/sssssqmz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-intersection-and-union-of-two-sets/sssssqmz"/>
      <lastmod>2026-11-02T00:31:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cornu-spiral/sssssqm0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cornu-spiral/sssssqm0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cornu-spiral/sssssqm0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cornu-spiral/sssssqm0"/>
      <lastmod>2026-11-01T19:25:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cornu-spiral/sssssqm0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cornu-spiral/sssssqm0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cornu-spiral/sssssqm0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cornu-spiral/sssssqm0"/>
      <lastmod>2026-11-01T19:25:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-perimeter-calculation/sssssqmd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-perimeter-calculation/sssssqmd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-perimeter-calculation/sssssqmd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-perimeter-calculation/sssssqmd"/>
      <lastmod>2026-11-02T11:55:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-perimeter-calculation/sssssqmd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-perimeter-calculation/sssssqmd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-perimeter-calculation/sssssqmd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-perimeter-calculation/sssssqmd"/>
      <lastmod>2026-11-02T11:55:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-an-ellipse-with-string/sssssqmf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-an-ellipse-with-string/sssssqmf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-an-ellipse-with-string/sssssqmf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-an-ellipse-with-string/sssssqmf"/>
      <lastmod>2026-11-01T20:49:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-an-ellipse-with-string/sssssqmf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-an-ellipse-with-string/sssssqmf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-an-ellipse-with-string/sssssqmf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-an-ellipse-with-string/sssssqmf"/>
      <lastmod>2026-11-01T20:49:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/filling-a-rectangular-prism/sssssqm8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/filling-a-rectangular-prism/sssssqm8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/filling-a-rectangular-prism/sssssqm8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/filling-a-rectangular-prism/sssssqm8"/>
      <lastmod>2026-11-01T23:23:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/filling-a-rectangular-prism/sssssqm8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/filling-a-rectangular-prism/sssssqm8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/filling-a-rectangular-prism/sssssqm8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/filling-a-rectangular-prism/sssssqm8"/>
      <lastmod>2026-11-01T23:23:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/water-volume-ro-binomial-distribution-and-riemann-sums-in-a-random-experimen/sssssqmu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/water-volume-ro-binomial-distribution-and-riemann-sums-in-a-random-experimen/sssssqmu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/water-volume-ro-binomial-distribution-and-riemann-sums-in-a-random-experimen/sssssqmu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/water-volume-ro-binomial-distribution-and-riemann-sums-in-a-random-experimen/sssssqmu"/>
      <lastmod>2026-11-02T06:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/water-volume-ro-binomial-distribution-and-riemann-sums-in-a-random-experimen/sssssqmu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/water-volume-ro-binomial-distribution-and-riemann-sums-in-a-random-experimen/sssssqmu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/water-volume-ro-binomial-distribution-and-riemann-sums-in-a-random-experimen/sssssqmu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/water-volume-ro-binomial-distribution-and-riemann-sums-in-a-random-experimen/sssssqmu"/>
      <lastmod>2026-11-02T06:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/joukowsky-map/sssssqm5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/joukowsky-map/sssssqm5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/joukowsky-map/sssssqm5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/joukowsky-map/sssssqm5"/>
      <lastmod>2026-11-01T19:26:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/joukowsky-map/sssssqm5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/joukowsky-map/sssssqm5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/joukowsky-map/sssssqm5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/joukowsky-map/sssssqm5"/>
      <lastmod>2026-11-01T19:26:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-variable-parts-perspective-on-trigonometry/sssssqmb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-variable-parts-perspective-on-trigonometry/sssssqmb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-variable-parts-perspective-on-trigonometry/sssssqmb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-variable-parts-perspective-on-trigonometry/sssssqmb"/>
      <lastmod>2026-11-01T20:59:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-variable-parts-perspective-on-trigonometry/sssssqmb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-variable-parts-perspective-on-trigonometry/sssssqmb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-variable-parts-perspective-on-trigonometry/sssssqmb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-variable-parts-perspective-on-trigonometry/sssssqmb"/>
      <lastmod>2026-11-01T20:59:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spheroid-constructed-with-circles-and-lines/sssssqm3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheroid-constructed-with-circles-and-lines/sssssqm3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheroid-constructed-with-circles-and-lines/sssssqm3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheroid-constructed-with-circles-and-lines/sssssqm3"/>
      <lastmod>2026-11-01T23:18:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spheroid-constructed-with-circles-and-lines/sssssqm3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheroid-constructed-with-circles-and-lines/sssssqm3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheroid-constructed-with-circles-and-lines/sssssqm3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheroid-constructed-with-circles-and-lines/sssssqm3"/>
      <lastmod>2026-11-01T23:18:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-cylinder-by-revolution-dynamic-solid-geometry/sssssqmq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-cylinder-by-revolution-dynamic-solid-geometry/sssssqmq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-cylinder-by-revolution-dynamic-solid-geometry/sssssqmq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-cylinder-by-revolution-dynamic-solid-geometry/sssssqmq"/>
      <lastmod>2026-11-02T18:51:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-cylinder-by-revolution-dynamic-solid-geometry/sssssqmq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-cylinder-by-revolution-dynamic-solid-geometry/sssssqmq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-cylinder-by-revolution-dynamic-solid-geometry/sssssqmq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-cylinder-by-revolution-dynamic-solid-geometry/sssssqmq"/>
      <lastmod>2026-11-02T18:51:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quarters-of-a-square/sssssqm1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quarters-of-a-square/sssssqm1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quarters-of-a-square/sssssqm1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quarters-of-a-square/sssssqm1"/>
      <lastmod>2026-11-02T08:32:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quarters-of-a-square/sssssqm1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quarters-of-a-square/sssssqm1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quarters-of-a-square/sssssqm1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quarters-of-a-square/sssssqm1"/>
      <lastmod>2026-11-02T08:32:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimate-fraction-in-a-set/sssssqmm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimate-fraction-in-a-set/sssssqmm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimate-fraction-in-a-set/sssssqmm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimate-fraction-in-a-set/sssssqmm"/>
      <lastmod>2026-11-01T23:51:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimate-fraction-in-a-set/sssssqmm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimate-fraction-in-a-set/sssssqmm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimate-fraction-in-a-set/sssssqmm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimate-fraction-in-a-set/sssssqmm"/>
      <lastmod>2026-11-01T23:51:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthoptic-i-e-directrix-of-a-parabola-using-locusequation/sssssqmj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthoptic-i-e-directrix-of-a-parabola-using-locusequation/sssssqmj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthoptic-i-e-directrix-of-a-parabola-using-locusequation/sssssqmj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthoptic-i-e-directrix-of-a-parabola-using-locusequation/sssssqmj"/>
      <lastmod>2026-11-02T15:37:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthoptic-i-e-directrix-of-a-parabola-using-locusequation/sssssqmj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthoptic-i-e-directrix-of-a-parabola-using-locusequation/sssssqmj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthoptic-i-e-directrix-of-a-parabola-using-locusequation/sssssqmj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthoptic-i-e-directrix-of-a-parabola-using-locusequation/sssssqmj"/>
      <lastmod>2026-11-02T15:37:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reasoning-about-equations-and-tape-diagrams-practice-part-1/sssssqmp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-about-equations-and-tape-diagrams-practice-part-1/sssssqmp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-about-equations-and-tape-diagrams-practice-part-1/sssssqmp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-about-equations-and-tape-diagrams-practice-part-1/sssssqmp"/>
      <lastmod>2026-11-02T10:36:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reasoning-about-equations-and-tape-diagrams-practice-part-1/sssssqmp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-about-equations-and-tape-diagrams-practice-part-1/sssssqmp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-about-equations-and-tape-diagrams-practice-part-1/sssssqmp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-about-equations-and-tape-diagrams-practice-part-1/sssssqmp"/>
      <lastmod>2026-11-02T10:36:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-sequences-and-series/sssssqmw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-sequences-and-series/sssssqmw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-sequences-and-series/sssssqmw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-sequences-and-series/sssssqmw"/>
      <lastmod>2026-11-02T16:30:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-sequences-and-series/sssssqmw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-sequences-and-series/sssssqmw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-sequences-and-series/sssssqmw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-sequences-and-series/sssssqmw"/>
      <lastmod>2026-11-02T16:30:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-product-illustration/sssssqm6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-product-illustration/sssssqm6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-product-illustration/sssssqm6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-product-illustration/sssssqm6"/>
      <lastmod>2026-11-01T21:11:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-product-illustration/sssssqm6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-product-illustration/sssssqm6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-product-illustration/sssssqm6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-product-illustration/sssssqm6"/>
      <lastmod>2026-11-01T21:11:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circular-cone-construction-and-area-exploration/sssssqmg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-cone-construction-and-area-exploration/sssssqmg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-cone-construction-and-area-exploration/sssssqmg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-cone-construction-and-area-exploration/sssssqmg"/>
      <lastmod>2026-11-02T03:17:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circular-cone-construction-and-area-exploration/sssssqmg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-cone-construction-and-area-exploration/sssssqmg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-cone-construction-and-area-exploration/sssssqmg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-cone-construction-and-area-exploration/sssssqmg"/>
      <lastmod>2026-11-02T03:17:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-lines-demo/sssssqm9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-lines-demo/sssssqm9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-lines-demo/sssssqm9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-lines-demo/sssssqm9"/>
      <lastmod>2026-11-02T02:38:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-lines-demo/sssssqm9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-lines-demo/sssssqm9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-lines-demo/sssssqm9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-lines-demo/sssssqm9"/>
      <lastmod>2026-11-02T02:38:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visual-sequence-generator-based-on-quadratic-function/sssssqme</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-sequence-generator-based-on-quadratic-function/sssssqme"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-sequence-generator-based-on-quadratic-function/sssssqme"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-sequence-generator-based-on-quadratic-function/sssssqme"/>
      <lastmod>2026-11-01T23:51:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visual-sequence-generator-based-on-quadratic-function/sssssqme</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-sequence-generator-based-on-quadratic-function/sssssqme"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-sequence-generator-based-on-quadratic-function/sssssqme"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-sequence-generator-based-on-quadratic-function/sssssqme"/>
      <lastmod>2026-11-01T23:51:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-demo-by-d-jayaseelan/sssssqmv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-d-jayaseelan/sssssqmv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demo-by-d-jayaseelan/sssssqmv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-d-jayaseelan/sssssqmv"/>
      <lastmod>2026-11-02T10:53:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-demo-by-d-jayaseelan/sssssqmv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-d-jayaseelan/sssssqmv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demo-by-d-jayaseelan/sssssqmv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-d-jayaseelan/sssssqmv"/>
      <lastmod>2026-11-02T10:53:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-animations-demo/sssssqm4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-animations-demo/sssssqm4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-animations-demo/sssssqm4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-animations-demo/sssssqm4"/>
      <lastmod>2026-11-02T12:07:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-animations-demo/sssssqm4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-animations-demo/sssssqm4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-animations-demo/sssssqm4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-animations-demo/sssssqm4"/>
      <lastmod>2026-11-02T12:07:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/center-of-mass-person-on-a-floating-raft-demo/sssssqml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-mass-person-on-a-floating-raft-demo/sssssqml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-mass-person-on-a-floating-raft-demo/sssssqml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-mass-person-on-a-floating-raft-demo/sssssqml"/>
      <lastmod>2026-11-01T23:49:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/center-of-mass-person-on-a-floating-raft-demo/sssssqml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-mass-person-on-a-floating-raft-demo/sssssqml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-mass-person-on-a-floating-raft-demo/sssssqml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-mass-person-on-a-floating-raft-demo/sssssqml"/>
      <lastmod>2026-11-01T23:49:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-construction/sssssqmy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-construction/sssssqmy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-construction/sssssqmy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-construction/sssssqmy"/>
      <lastmod>2026-11-02T07:29:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-construction/sssssqmy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-construction/sssssqmy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-construction/sssssqmy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-construction/sssssqmy"/>
      <lastmod>2026-11-02T07:29:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-and-inscribed-sphere/sssssqma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-inscribed-sphere/sssssqma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-inscribed-sphere/sssssqma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-inscribed-sphere/sssssqma"/>
      <lastmod>2026-11-02T17:37:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-and-inscribed-sphere/sssssqma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-inscribed-sphere/sssssqma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-inscribed-sphere/sssssqma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-inscribed-sphere/sssssqma"/>
      <lastmod>2026-11-02T17:37:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fourbar-mechanism-velocity-and-acceleration-diagrams/sssssqmc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fourbar-mechanism-velocity-and-acceleration-diagrams/sssssqmc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fourbar-mechanism-velocity-and-acceleration-diagrams/sssssqmc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fourbar-mechanism-velocity-and-acceleration-diagrams/sssssqmc"/>
      <lastmod>2026-11-02T00:49:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fourbar-mechanism-velocity-and-acceleration-diagrams/sssssqmc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fourbar-mechanism-velocity-and-acceleration-diagrams/sssssqmc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fourbar-mechanism-velocity-and-acceleration-diagrams/sssssqmc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fourbar-mechanism-velocity-and-acceleration-diagrams/sssssqmc"/>
      <lastmod>2026-11-02T00:49:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visual-sequence-generator-based-on-quadratic-functions/sssssqmr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-sequence-generator-based-on-quadratic-functions/sssssqmr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-sequence-generator-based-on-quadratic-functions/sssssqmr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-sequence-generator-based-on-quadratic-functions/sssssqmr"/>
      <lastmod>2026-11-02T00:02:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visual-sequence-generator-based-on-quadratic-functions/sssssqmr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-sequence-generator-based-on-quadratic-functions/sssssqmr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-sequence-generator-based-on-quadratic-functions/sssssqmr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-sequence-generator-based-on-quadratic-functions/sssssqmr"/>
      <lastmod>2026-11-02T00:02:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumference-of-circle-with-radius-r-1-unit-animation/sssssqmh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumference-of-circle-with-radius-r-1-unit-animation/sssssqmh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumference-of-circle-with-radius-r-1-unit-animation/sssssqmh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumference-of-circle-with-radius-r-1-unit-animation/sssssqmh"/>
      <lastmod>2026-11-01T20:45:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumference-of-circle-with-radius-r-1-unit-animation/sssssqmh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumference-of-circle-with-radius-r-1-unit-animation/sssssqmh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumference-of-circle-with-radius-r-1-unit-animation/sssssqmh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumference-of-circle-with-radius-r-1-unit-animation/sssssqmh"/>
      <lastmod>2026-11-01T20:45:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rational-numbers-and-scatter-plot/sssssqmt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-numbers-and-scatter-plot/sssssqmt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-numbers-and-scatter-plot/sssssqmt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-numbers-and-scatter-plot/sssssqmt"/>
      <lastmod>2026-11-02T02:56:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rational-numbers-and-scatter-plot/sssssqmt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-numbers-and-scatter-plot/sssssqmt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-numbers-and-scatter-plot/sssssqmt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-numbers-and-scatter-plot/sssssqmt"/>
      <lastmod>2026-11-02T02:56:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-trevor-leach/sssssqmx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-trevor-leach/sssssqmx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-polygons-by-trevor-leach/sssssqmx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-trevor-leach/sssssqmx"/>
      <lastmod>2026-11-02T00:13:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angles-of-polygons-by-trevor-leach/sssssqmx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-trevor-leach/sssssqmx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-polygons-by-trevor-leach/sssssqmx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-trevor-leach/sssssqmx"/>
      <lastmod>2026-11-02T00:13:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/converse-of-ist-discovery-template/sssssqmi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converse-of-ist-discovery-template/sssssqmi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converse-of-ist-discovery-template/sssssqmi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converse-of-ist-discovery-template/sssssqmi"/>
      <lastmod>2026-11-02T16:48:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/converse-of-ist-discovery-template/sssssqmi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converse-of-ist-discovery-template/sssssqmi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converse-of-ist-discovery-template/sssssqmi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converse-of-ist-discovery-template/sssssqmi"/>
      <lastmod>2026-11-02T16:48:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-marko-kne-evi/sssssqmo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-marko-kne-evi/sssssqmo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-by-marko-kne-evi/sssssqmo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-marko-kne-evi/sssssqmo"/>
      <lastmod>2026-11-01T23:47:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-functions-by-marko-kne-evi/sssssqmo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-marko-kne-evi/sssssqmo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-by-marko-kne-evi/sssssqmo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-marko-kne-evi/sssssqmo"/>
      <lastmod>2026-11-01T23:47:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-angled-triangles-quiz/sssssqjs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-angled-triangles-quiz/sssssqjs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-angled-triangles-quiz/sssssqjs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-angled-triangles-quiz/sssssqjs"/>
      <lastmod>2026-11-01T19:05:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-angled-triangles-quiz/sssssqjs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-angled-triangles-quiz/sssssqjs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-angled-triangles-quiz/sssssqjs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-angled-triangles-quiz/sssssqjs"/>
      <lastmod>2026-11-01T19:05:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-exploration-tool/sssssqj7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-tool/sssssqj7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exploration-tool/sssssqj7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-tool/sssssqj7"/>
      <lastmod>2026-11-02T00:29:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-exploration-tool/sssssqj7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-tool/sssssqj7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exploration-tool/sssssqj7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-tool/sssssqj7"/>
      <lastmod>2026-11-02T00:29:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-circle/sssssqjn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-circle/sssssqjn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-line-and-a-circle/sssssqjn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-circle/sssssqjn"/>
      <lastmod>2026-11-01T19:06:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-a-line-and-a-circle/sssssqjn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-circle/sssssqjn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-line-and-a-circle/sssssqjn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-circle/sssssqjn"/>
      <lastmod>2026-11-01T19:06:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slicing-a-sphere/sssssqj2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-a-sphere/sssssqj2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-a-sphere/sssssqj2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-a-sphere/sssssqj2"/>
      <lastmod>2026-11-02T16:54:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slicing-a-sphere/sssssqj2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-a-sphere/sssssqj2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-a-sphere/sssssqj2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-a-sphere/sssssqj2"/>
      <lastmod>2026-11-02T16:54:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-and-pyramid/sssssqjk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-pyramid/sssssqjk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-pyramid/sssssqjk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-pyramid/sssssqjk"/>
      <lastmod>2026-11-01T21:23:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-and-pyramid/sssssqjk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-pyramid/sssssqjk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-pyramid/sssssqjk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-pyramid/sssssqjk"/>
      <lastmod>2026-11-01T21:23:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-andrew-langstone/sssssqjz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-andrew-langstone/sssssqjz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-demonstration-by-andrew-langstone/sssssqjz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-andrew-langstone/sssssqjz"/>
      <lastmod>2026-11-02T13:06:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-demonstration-by-andrew-langstone/sssssqjz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-andrew-langstone/sssssqjz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-demonstration-by-andrew-langstone/sssssqjz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-andrew-langstone/sssssqjz"/>
      <lastmod>2026-11-02T13:06:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-sequence-convergence-does-not-imply-pointwise-convergence/sssssqj0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-sequence-convergence-does-not-imply-pointwise-convergence/sssssqj0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-sequence-convergence-does-not-imply-pointwise-convergence/sssssqj0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-sequence-convergence-does-not-imply-pointwise-convergence/sssssqj0"/>
      <lastmod>2026-11-01T23:15:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-sequence-convergence-does-not-imply-pointwise-convergence/sssssqj0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-sequence-convergence-does-not-imply-pointwise-convergence/sssssqj0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-sequence-convergence-does-not-imply-pointwise-convergence/sssssqj0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-sequence-convergence-does-not-imply-pointwise-convergence/sssssqj0"/>
      <lastmod>2026-11-01T23:15:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-and-rhombus-construction-demo/sssssqjd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-and-rhombus-construction-demo/sssssqjd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-and-rhombus-construction-demo/sssssqjd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-and-rhombus-construction-demo/sssssqjd"/>
      <lastmod>2026-11-01T23:48:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-and-rhombus-construction-demo/sssssqjd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-and-rhombus-construction-demo/sssssqjd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-and-rhombus-construction-demo/sssssqjd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-and-rhombus-construction-demo/sssssqjd"/>
      <lastmod>2026-11-01T23:48:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-surface-area-demonstration/sssssqjf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-demonstration/sssssqjf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area-demonstration/sssssqjf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-demonstration/sssssqjf"/>
      <lastmod>2026-11-01T23:21:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-surface-area-demonstration/sssssqjf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-demonstration/sssssqjf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area-demonstration/sssssqjf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-demonstration/sssssqjf"/>
      <lastmod>2026-11-01T23:21:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inverse-matrix-gauss-jordan/sssssqj8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-matrix-gauss-jordan/sssssqj8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-matrix-gauss-jordan/sssssqj8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-matrix-gauss-jordan/sssssqj8"/>
      <lastmod>2026-11-02T18:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inverse-matrix-gauss-jordan/sssssqj8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-matrix-gauss-jordan/sssssqj8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-matrix-gauss-jordan/sssssqj8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-matrix-gauss-jordan/sssssqj8"/>
      <lastmod>2026-11-02T18:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-and-statistics-experiment/sssssqju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-and-statistics-experiment/sssssqju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-and-statistics-experiment/sssssqju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-and-statistics-experiment/sssssqju"/>
      <lastmod>2026-11-02T18:48:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-and-statistics-experiment/sssssqju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-and-statistics-experiment/sssssqju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-and-statistics-experiment/sssssqju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-and-statistics-experiment/sssssqju"/>
      <lastmod>2026-11-02T18:48:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/jack-puzzle-cube/sssssqj5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/jack-puzzle-cube/sssssqj5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/jack-puzzle-cube/sssssqj5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/jack-puzzle-cube/sssssqj5"/>
      <lastmod>2026-11-02T18:15:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/jack-puzzle-cube/sssssqj5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/jack-puzzle-cube/sssssqj5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/jack-puzzle-cube/sssssqj5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/jack-puzzle-cube/sssssqj5"/>
      <lastmod>2026-11-02T18:15:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-construction/sssssqjb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-construction/sssssqjb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-construction/sssssqjb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-construction/sssssqjb"/>
      <lastmod>2026-11-01T20:41:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-construction/sssssqjb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-construction/sssssqjb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-construction/sssssqjb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-construction/sssssqjb"/>
      <lastmod>2026-11-01T20:41:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-fractions-random-sectors-and-segments-visualization/sssssqj3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-fractions-random-sectors-and-segments-visualization/sssssqj3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-fractions-random-sectors-and-segments-visualization/sssssqj3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-fractions-random-sectors-and-segments-visualization/sssssqj3"/>
      <lastmod>2026-11-02T10:51:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-fractions-random-sectors-and-segments-visualization/sssssqj3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-fractions-random-sectors-and-segments-visualization/sssssqj3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-fractions-random-sectors-and-segments-visualization/sssssqj3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-fractions-random-sectors-and-segments-visualization/sssssqj3"/>
      <lastmod>2026-11-02T10:51:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-construction/sssssqjq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-construction/sssssqjq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-construction/sssssqjq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-construction/sssssqjq"/>
      <lastmod>2026-11-02T02:24:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-construction/sssssqjq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-construction/sssssqjq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-construction/sssssqjq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-construction/sssssqjq"/>
      <lastmod>2026-11-02T02:24:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mean-standard-deviation-using-spreadsheet/sssssqj1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-standard-deviation-using-spreadsheet/sssssqj1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-standard-deviation-using-spreadsheet/sssssqj1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-standard-deviation-using-spreadsheet/sssssqj1"/>
      <lastmod>2026-11-02T18:54:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mean-standard-deviation-using-spreadsheet/sssssqj1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-standard-deviation-using-spreadsheet/sssssqj1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-standard-deviation-using-spreadsheet/sssssqj1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-standard-deviation-using-spreadsheet/sssssqj1"/>
      <lastmod>2026-11-02T18:54:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/analogy-between-statics-geometry/sssssqjm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/analogy-between-statics-geometry/sssssqjm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/analogy-between-statics-geometry/sssssqjm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/analogy-between-statics-geometry/sssssqjm"/>
      <lastmod>2026-11-02T12:40:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/analogy-between-statics-geometry/sssssqjm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/analogy-between-statics-geometry/sssssqjm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/analogy-between-statics-geometry/sssssqjm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/analogy-between-statics-geometry/sssssqjm"/>
      <lastmod>2026-11-02T12:40:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-the-golden-ratio-in-real-life-objects/sssssqjj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-the-golden-ratio-in-real-life-objects/sssssqjj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-the-golden-ratio-in-real-life-objects/sssssqjj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-the-golden-ratio-in-real-life-objects/sssssqjj"/>
      <lastmod>2026-11-02T02:33:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-the-golden-ratio-in-real-life-objects/sssssqjj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-the-golden-ratio-in-real-life-objects/sssssqjj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-the-golden-ratio-in-real-life-objects/sssssqjj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-the-golden-ratio-in-real-life-objects/sssssqjj"/>
      <lastmod>2026-11-02T02:33:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-numbers-from-place-value/sssssqjp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-numbers-from-place-value/sssssqjp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-numbers-from-place-value/sssssqjp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-numbers-from-place-value/sssssqjp"/>
      <lastmod>2026-11-02T18:25:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-numbers-from-place-value/sssssqjp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-numbers-from-place-value/sssssqjp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-numbers-from-place-value/sssssqjp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-numbers-from-place-value/sssssqjp"/>
      <lastmod>2026-11-02T18:25:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plane-cutting-an-ellipsoid-cross-section-visualization/sssssqjw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-cutting-an-ellipsoid-cross-section-visualization/sssssqjw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-cutting-an-ellipsoid-cross-section-visualization/sssssqjw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-cutting-an-ellipsoid-cross-section-visualization/sssssqjw"/>
      <lastmod>2026-11-02T00:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plane-cutting-an-ellipsoid-cross-section-visualization/sssssqjw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-cutting-an-ellipsoid-cross-section-visualization/sssssqjw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-cutting-an-ellipsoid-cross-section-visualization/sssssqjw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-cutting-an-ellipsoid-cross-section-visualization/sssssqjw"/>
      <lastmod>2026-11-02T00:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-and-sine-function/sssssqj6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-and-sine-function/sssssqj6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-and-sine-function/sssssqj6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-and-sine-function/sssssqj6"/>
      <lastmod>2026-11-02T17:56:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-and-sine-function/sssssqj6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-and-sine-function/sssssqj6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-and-sine-function/sssssqj6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-and-sine-function/sssssqj6"/>
      <lastmod>2026-11-02T17:56:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-similarity-definition-criteria-and-demonstrations/sssssqjg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-similarity-definition-criteria-and-demonstrations/sssssqjg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-similarity-definition-criteria-and-demonstrations/sssssqjg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-similarity-definition-criteria-and-demonstrations/sssssqjg"/>
      <lastmod>2026-11-01T19:26:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-similarity-definition-criteria-and-demonstrations/sssssqjg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-similarity-definition-criteria-and-demonstrations/sssssqjg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-similarity-definition-criteria-and-demonstrations/sssssqjg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-similarity-definition-criteria-and-demonstrations/sssssqjg"/>
      <lastmod>2026-11-01T19:26:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-theme-special-handling/sssssqj9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-theme-special-handling/sssssqj9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-theme-special-handling/sssssqj9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-theme-special-handling/sssssqj9"/>
      <lastmod>2026-11-02T17:57:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-theme-special-handling/sssssqj9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-theme-special-handling/sssssqj9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-theme-special-handling/sssssqj9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-theme-special-handling/sssssqj9"/>
      <lastmod>2026-11-02T17:57:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-of-sine-cosine-and-tangent/sssssqje</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-sine-cosine-and-tangent/sssssqje"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-sine-cosine-and-tangent/sssssqje"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-sine-cosine-and-tangent/sssssqje"/>
      <lastmod>2026-11-02T18:00:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-of-sine-cosine-and-tangent/sssssqje</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-sine-cosine-and-tangent/sssssqje"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-sine-cosine-and-tangent/sssssqje"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-sine-cosine-and-tangent/sssssqje"/>
      <lastmod>2026-11-02T18:00:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/voronoi-and-delaunay/sssssqjv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-and-delaunay/sssssqjv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-and-delaunay/sssssqjv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-and-delaunay/sssssqjv"/>
      <lastmod>2026-11-01T23:11:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/voronoi-and-delaunay/sssssqjv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-and-delaunay/sssssqjv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-and-delaunay/sssssqjv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-and-delaunay/sssssqjv"/>
      <lastmod>2026-11-01T23:11:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plot-the-rotation-about-origin/sssssqj4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plot-the-rotation-about-origin/sssssqj4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plot-the-rotation-about-origin/sssssqj4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plot-the-rotation-about-origin/sssssqj4"/>
      <lastmod>2026-11-02T17:46:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plot-the-rotation-about-origin/sssssqj4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plot-the-rotation-about-origin/sssssqj4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plot-the-rotation-about-origin/sssssqj4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plot-the-rotation-about-origin/sssssqj4"/>
      <lastmod>2026-11-02T17:46:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/resultant-force-of-two-parallel-forces/sssssqjl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/resultant-force-of-two-parallel-forces/sssssqjl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/resultant-force-of-two-parallel-forces/sssssqjl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/resultant-force-of-two-parallel-forces/sssssqjl"/>
      <lastmod>2026-11-01T21:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/resultant-force-of-two-parallel-forces/sssssqjl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/resultant-force-of-two-parallel-forces/sssssqjl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/resultant-force-of-two-parallel-forces/sssssqjl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/resultant-force-of-two-parallel-forces/sssssqjl"/>
      <lastmod>2026-11-01T21:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-subtraction-with-bar-models-set-1/sssssqjy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-subtraction-with-bar-models-set-1/sssssqjy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-subtraction-with-bar-models-set-1/sssssqjy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-subtraction-with-bar-models-set-1/sssssqjy"/>
      <lastmod>2026-11-01T21:13:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-subtraction-with-bar-models-set-1/sssssqjy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-subtraction-with-bar-models-set-1/sssssqjy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-subtraction-with-bar-models-set-1/sssssqjy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-subtraction-with-bar-models-set-1/sssssqjy"/>
      <lastmod>2026-11-01T21:13:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-with-movable-center/sssssqja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-with-movable-center/sssssqja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-with-movable-center/sssssqja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-with-movable-center/sssssqja"/>
      <lastmod>2026-11-01T23:22:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-with-movable-center/sssssqja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-with-movable-center/sssssqja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-with-movable-center/sssssqja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-with-movable-center/sssssqja"/>
      <lastmod>2026-11-01T23:22:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/power-of-a-power-rule/sssssqjc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-of-a-power-rule/sssssqjc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-of-a-power-rule/sssssqjc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-of-a-power-rule/sssssqjc"/>
      <lastmod>2026-11-02T13:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/power-of-a-power-rule/sssssqjc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-of-a-power-rule/sssssqjc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-of-a-power-rule/sssssqjc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-of-a-power-rule/sssssqjc"/>
      <lastmod>2026-11-02T13:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-visualization-bar-chart-and-unit-circle-linkage/sssssqjr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-visualization-bar-chart-and-unit-circle-linkage/sssssqjr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-visualization-bar-chart-and-unit-circle-linkage/sssssqjr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-visualization-bar-chart-and-unit-circle-linkage/sssssqjr"/>
      <lastmod>2026-11-02T00:46:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-visualization-bar-chart-and-unit-circle-linkage/sssssqjr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-visualization-bar-chart-and-unit-circle-linkage/sssssqjr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-visualization-bar-chart-and-unit-circle-linkage/sssssqjr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-visualization-bar-chart-and-unit-circle-linkage/sssssqjr"/>
      <lastmod>2026-11-02T00:46:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-sections-of-a-rotating-cylinder/sssssqjh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-rotating-cylinder/sssssqjh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-rotating-cylinder/sssssqjh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-rotating-cylinder/sssssqjh"/>
      <lastmod>2026-11-01T23:25:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-sections-of-a-rotating-cylinder/sssssqjh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-rotating-cylinder/sssssqjh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-rotating-cylinder/sssssqjh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-rotating-cylinder/sssssqjh"/>
      <lastmod>2026-11-01T23:25:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/creating-a-scatter-plot-dp1b-04-p3-q3-interactive-exercise/sssssqjt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-a-scatter-plot-dp1b-04-p3-q3-interactive-exercise/sssssqjt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-a-scatter-plot-dp1b-04-p3-q3-interactive-exercise/sssssqjt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-a-scatter-plot-dp1b-04-p3-q3-interactive-exercise/sssssqjt"/>
      <lastmod>2026-11-02T03:15:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/creating-a-scatter-plot-dp1b-04-p3-q3-interactive-exercise/sssssqjt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-a-scatter-plot-dp1b-04-p3-q3-interactive-exercise/sssssqjt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-a-scatter-plot-dp1b-04-p3-q3-interactive-exercise/sssssqjt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-a-scatter-plot-dp1b-04-p3-q3-interactive-exercise/sssssqjt"/>
      <lastmod>2026-11-02T03:15:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-number-of-a-complex-system-by-timur-kapitsa/sssssqjx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-number-of-a-complex-system-by-timur-kapitsa/sssssqjx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-number-of-a-complex-system-by-timur-kapitsa/sssssqjx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-number-of-a-complex-system-by-timur-kapitsa/sssssqjx"/>
      <lastmod>2026-11-01T21:47:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-number-of-a-complex-system-by-timur-kapitsa/sssssqjx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-number-of-a-complex-system-by-timur-kapitsa/sssssqjx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-number-of-a-complex-system-by-timur-kapitsa/sssssqjx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-number-of-a-complex-system-by-timur-kapitsa/sssssqjx"/>
      <lastmod>2026-11-01T21:47:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complete-quadrangle-and-circle-constructions/sssssqji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complete-quadrangle-and-circle-constructions/sssssqji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complete-quadrangle-and-circle-constructions/sssssqji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complete-quadrangle-and-circle-constructions/sssssqji"/>
      <lastmod>2026-11-02T17:44:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complete-quadrangle-and-circle-constructions/sssssqji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complete-quadrangle-and-circle-constructions/sssssqji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complete-quadrangle-and-circle-constructions/sssssqji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complete-quadrangle-and-circle-constructions/sssssqji"/>
      <lastmod>2026-11-02T17:44:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/natural-logarithm-and-its-integral-relationship/sssssqjo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/natural-logarithm-and-its-integral-relationship/sssssqjo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/natural-logarithm-and-its-integral-relationship/sssssqjo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/natural-logarithm-and-its-integral-relationship/sssssqjo"/>
      <lastmod>2026-11-01T19:03:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/natural-logarithm-and-its-integral-relationship/sssssqjo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/natural-logarithm-and-its-integral-relationship/sssssqjo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/natural-logarithm-and-its-integral-relationship/sssssqjo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/natural-logarithm-and-its-integral-relationship/sssssqjo"/>
      <lastmod>2026-11-01T19:03:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-line-mirroring-a-pyramid-in-geogebra/sssssqps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-line-mirroring-a-pyramid-in-geogebra/sssssqps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-line-mirroring-a-pyramid-in-geogebra/sssssqps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-line-mirroring-a-pyramid-in-geogebra/sssssqps"/>
      <lastmod>2026-11-02T18:04:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-line-mirroring-a-pyramid-in-geogebra/sssssqps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-line-mirroring-a-pyramid-in-geogebra/sssssqps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-line-mirroring-a-pyramid-in-geogebra/sssssqps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-line-mirroring-a-pyramid-in-geogebra/sssssqps"/>
      <lastmod>2026-11-02T18:04:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/system-of-3-equations-3-variables/sssssqp7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-3-equations-3-variables/sssssqp7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-3-equations-3-variables/sssssqp7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-3-equations-3-variables/sssssqp7"/>
      <lastmod>2026-11-02T08:53:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/system-of-3-equations-3-variables/sssssqp7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-3-equations-3-variables/sssssqp7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-3-equations-3-variables/sssssqp7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-3-equations-3-variables/sssssqp7"/>
      <lastmod>2026-11-02T08:53:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/folding-box-maximum-volume-dynamic-simulation-and-extreme-value/sssssqpn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folding-box-maximum-volume-dynamic-simulation-and-extreme-value/sssssqpn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folding-box-maximum-volume-dynamic-simulation-and-extreme-value/sssssqpn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folding-box-maximum-volume-dynamic-simulation-and-extreme-value/sssssqpn"/>
      <lastmod>2026-11-01T22:00:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/folding-box-maximum-volume-dynamic-simulation-and-extreme-value/sssssqpn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folding-box-maximum-volume-dynamic-simulation-and-extreme-value/sssssqpn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folding-box-maximum-volume-dynamic-simulation-and-extreme-value/sssssqpn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folding-box-maximum-volume-dynamic-simulation-and-extreme-value/sssssqpn"/>
      <lastmod>2026-11-01T22:00:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-of-centroids-of-triangles-inscribed-in-parabola-with-constant-area/sssssqp2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-centroids-of-triangles-inscribed-in-parabola-with-constant-area/sssssqp2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-centroids-of-triangles-inscribed-in-parabola-with-constant-area/sssssqp2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-centroids-of-triangles-inscribed-in-parabola-with-constant-area/sssssqp2"/>
      <lastmod>2026-11-01T19:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-of-centroids-of-triangles-inscribed-in-parabola-with-constant-area/sssssqp2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-centroids-of-triangles-inscribed-in-parabola-with-constant-area/sssssqp2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-centroids-of-triangles-inscribed-in-parabola-with-constant-area/sssssqp2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-centroids-of-triangles-inscribed-in-parabola-with-constant-area/sssssqp2"/>
      <lastmod>2026-11-01T19:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-demonstration-of-exterior-angles-of-polygons/sssssqpk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-demonstration-of-exterior-angles-of-polygons/sssssqpk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-demonstration-of-exterior-angles-of-polygons/sssssqpk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-demonstration-of-exterior-angles-of-polygons/sssssqpk"/>
      <lastmod>2026-11-02T18:44:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-demonstration-of-exterior-angles-of-polygons/sssssqpk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-demonstration-of-exterior-angles-of-polygons/sssssqpk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-demonstration-of-exterior-angles-of-polygons/sssssqpk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-demonstration-of-exterior-angles-of-polygons/sssssqpk"/>
      <lastmod>2026-11-02T18:44:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diameter-of-triangle/sssssqpz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diameter-of-triangle/sssssqpz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diameter-of-triangle/sssssqpz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diameter-of-triangle/sssssqpz"/>
      <lastmod>2026-11-01T23:30:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diameter-of-triangle/sssssqpz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diameter-of-triangle/sssssqpz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diameter-of-triangle/sssssqpz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diameter-of-triangle/sssssqpz"/>
      <lastmod>2026-11-01T23:30:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-2d-vectors-and-slope-demo/sssssqp0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-2d-vectors-and-slope-demo/sssssqp0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-2d-vectors-and-slope-demo/sssssqp0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-2d-vectors-and-slope-demo/sssssqp0"/>
      <lastmod>2026-11-02T00:48:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-2d-vectors-and-slope-demo/sssssqp0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-2d-vectors-and-slope-demo/sssssqp0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-2d-vectors-and-slope-demo/sssssqp0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-2d-vectors-and-slope-demo/sssssqp0"/>
      <lastmod>2026-11-02T00:48:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sketching-a-complex-set/sssssqpd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketching-a-complex-set/sssssqpd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketching-a-complex-set/sssssqpd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketching-a-complex-set/sssssqpd"/>
      <lastmod>2026-11-01T23:25:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sketching-a-complex-set/sssssqpd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketching-a-complex-set/sssssqpd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketching-a-complex-set/sssssqpd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketching-a-complex-set/sssssqpd"/>
      <lastmod>2026-11-01T23:25:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoids-and-kites-incircles-and-similarity-transformations/sssssqpf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoids-and-kites-incircles-and-similarity-transformations/sssssqpf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoids-and-kites-incircles-and-similarity-transformations/sssssqpf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoids-and-kites-incircles-and-similarity-transformations/sssssqpf"/>
      <lastmod>2026-11-02T17:55:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoids-and-kites-incircles-and-similarity-transformations/sssssqpf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoids-and-kites-incircles-and-similarity-transformations/sssssqpf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoids-and-kites-incircles-and-similarity-transformations/sssssqpf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoids-and-kites-incircles-and-similarity-transformations/sssssqpf"/>
      <lastmod>2026-11-02T17:55:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rate-of-change-in-a-100m-race/sssssqp8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rate-of-change-in-a-100m-race/sssssqp8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rate-of-change-in-a-100m-race/sssssqp8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rate-of-change-in-a-100m-race/sssssqp8"/>
      <lastmod>2026-11-01T23:16:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rate-of-change-in-a-100m-race/sssssqp8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rate-of-change-in-a-100m-race/sssssqp8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rate-of-change-in-a-100m-race/sssssqp8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rate-of-change-in-a-100m-race/sssssqp8"/>
      <lastmod>2026-11-01T23:16:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-slope-form-visualizing-linear-functions/sssssqpu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-slope-form-visualizing-linear-functions/sssssqpu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-slope-form-visualizing-linear-functions/sssssqpu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-slope-form-visualizing-linear-functions/sssssqpu"/>
      <lastmod>2026-11-02T00:33:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-slope-form-visualizing-linear-functions/sssssqpu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-slope-form-visualizing-linear-functions/sssssqpu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-slope-form-visualizing-linear-functions/sssssqpu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-slope-form-visualizing-linear-functions/sssssqpu"/>
      <lastmod>2026-11-02T00:33:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-background-information-example/sssssqp5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-background-information-example/sssssqp5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-background-information-example/sssssqp5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-background-information-example/sssssqp5"/>
      <lastmod>2026-11-02T03:14:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-background-information-example/sssssqp5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-background-information-example/sssssqp5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-background-information-example/sssssqp5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-background-information-example/sssssqp5"/>
      <lastmod>2026-11-02T03:14:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-by-mcw0037/sssssqpb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-mcw0037/sssssqpb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-mcw0037/sssssqpb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-mcw0037/sssssqpb"/>
      <lastmod>2026-11-01T23:34:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-by-mcw0037/sssssqpb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-mcw0037/sssssqpb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-mcw0037/sssssqpb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-mcw0037/sssssqpb"/>
      <lastmod>2026-11-01T23:34:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identify-transformation-type/sssssqp3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-transformation-type/sssssqp3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-transformation-type/sssssqp3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-transformation-type/sssssqp3"/>
      <lastmod>2026-11-02T16:55:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identify-transformation-type/sssssqp3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-transformation-type/sssssqp3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-transformation-type/sssssqp3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-transformation-type/sssssqp3"/>
      <lastmod>2026-11-02T16:55:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-relations-from-a-table-of-values/sssssqpq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-relations-from-a-table-of-values/sssssqpq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-relations-from-a-table-of-values/sssssqpq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-relations-from-a-table-of-values/sssssqpq"/>
      <lastmod>2026-11-01T23:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-relations-from-a-table-of-values/sssssqpq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-relations-from-a-table-of-values/sssssqpq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-relations-from-a-table-of-values/sssssqpq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-relations-from-a-table-of-values/sssssqpq"/>
      <lastmod>2026-11-01T23:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bifurcation-diagram-construction-by-justin-dunmyre/sssssqp1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bifurcation-diagram-construction-by-justin-dunmyre/sssssqp1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bifurcation-diagram-construction-by-justin-dunmyre/sssssqp1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bifurcation-diagram-construction-by-justin-dunmyre/sssssqp1"/>
      <lastmod>2026-11-02T18:10:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bifurcation-diagram-construction-by-justin-dunmyre/sssssqp1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bifurcation-diagram-construction-by-justin-dunmyre/sssssqp1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bifurcation-diagram-construction-by-justin-dunmyre/sssssqp1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bifurcation-diagram-construction-by-justin-dunmyre/sssssqp1"/>
      <lastmod>2026-11-02T18:10:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/does-wearing-a-large-shirt-increase-iq-math-demo/sssssqpm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/does-wearing-a-large-shirt-increase-iq-math-demo/sssssqpm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/does-wearing-a-large-shirt-increase-iq-math-demo/sssssqpm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/does-wearing-a-large-shirt-increase-iq-math-demo/sssssqpm"/>
      <lastmod>2026-11-02T12:45:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/does-wearing-a-large-shirt-increase-iq-math-demo/sssssqpm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/does-wearing-a-large-shirt-increase-iq-math-demo/sssssqpm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/does-wearing-a-large-shirt-increase-iq-math-demo/sssssqpm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/does-wearing-a-large-shirt-increase-iq-math-demo/sssssqpm"/>
      <lastmod>2026-11-02T12:45:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-rotating-around-a-torus/sssssqpj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-rotating-around-a-torus/sssssqpj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-rotating-around-a-torus/sssssqpj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-rotating-around-a-torus/sssssqpj"/>
      <lastmod>2026-11-01T23:21:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-rotating-around-a-torus/sssssqpj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-rotating-around-a-torus/sssssqpj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-rotating-around-a-torus/sssssqpj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-rotating-around-a-torus/sssssqpj"/>
      <lastmod>2026-11-01T23:21:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-about-x-axis-and-y-axis/sssssqpp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-about-x-axis-and-y-axis/sssssqpp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-about-x-axis-and-y-axis/sssssqpp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-about-x-axis-and-y-axis/sssssqpp"/>
      <lastmod>2026-11-01T23:49:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-about-x-axis-and-y-axis/sssssqpp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-about-x-axis-and-y-axis/sssssqpp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-about-x-axis-and-y-axis/sssssqpp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-about-x-axis-and-y-axis/sssssqpp"/>
      <lastmod>2026-11-01T23:49:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-components/sssssqpw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-components/sssssqpw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-components/sssssqpw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-components/sssssqpw"/>
      <lastmod>2026-11-02T03:05:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-components/sssssqpw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-components/sssssqpw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-components/sssssqpw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-components/sssssqpw"/>
      <lastmod>2026-11-02T03:05:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-addition-postulate-application/sssssqp6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-application/sssssqp6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-application/sssssqp6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-application/sssssqp6"/>
      <lastmod>2026-11-02T18:55:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/segment-addition-postulate-application/sssssqp6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-application/sssssqp6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-application/sssssqp6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-application/sssssqp6"/>
      <lastmod>2026-11-02T18:55:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-art-by-andrei-n/sssssqpg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-art-by-andrei-n/sssssqpg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-art-by-andrei-n/sssssqpg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-art-by-andrei-n/sssssqpg"/>
      <lastmod>2026-11-01T23:22:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-art-by-andrei-n/sssssqpg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-art-by-andrei-n/sssssqpg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-art-by-andrei-n/sssssqpg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-art-by-andrei-n/sssssqpg"/>
      <lastmod>2026-11-01T23:22:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-vector-valued-functions/sssssqp9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-vector-valued-functions/sssssqp9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-vector-valued-functions/sssssqp9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-vector-valued-functions/sssssqp9"/>
      <lastmod>2026-11-01T21:57:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-vector-valued-functions/sssssqp9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-vector-valued-functions/sssssqp9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-vector-valued-functions/sssssqp9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-vector-valued-functions/sssssqp9"/>
      <lastmod>2026-11-01T21:57:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/statistics-app-1/sssssqpe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-app-1/sssssqpe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-app-1/sssssqpe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-app-1/sssssqpe"/>
      <lastmod>2026-11-02T16:42:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/statistics-app-1/sssssqpe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-app-1/sssssqpe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-app-1/sssssqpe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-app-1/sssssqpe"/>
      <lastmod>2026-11-02T16:42:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solids-of-revolution-sphere/sssssqpv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solids-of-revolution-sphere/sssssqpv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solids-of-revolution-sphere/sssssqpv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solids-of-revolution-sphere/sssssqpv"/>
      <lastmod>2026-11-02T16:40:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solids-of-revolution-sphere/sssssqpv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solids-of-revolution-sphere/sssssqpv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solids-of-revolution-sphere/sssssqpv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solids-of-revolution-sphere/sssssqpv"/>
      <lastmod>2026-11-02T16:40:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/independent-distributions-2/sssssqp4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/independent-distributions-2/sssssqp4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/independent-distributions-2/sssssqp4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/independent-distributions-2/sssssqp4"/>
      <lastmod>2026-11-01T21:08:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/independent-distributions-2/sssssqp4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/independent-distributions-2/sssssqp4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/independent-distributions-2/sssssqp4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/independent-distributions-2/sssssqp4"/>
      <lastmod>2026-11-01T21:08:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algeblocks-basic-mat-demo/sssssqpl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algeblocks-basic-mat-demo/sssssqpl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algeblocks-basic-mat-demo/sssssqpl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algeblocks-basic-mat-demo/sssssqpl"/>
      <lastmod>2026-11-01T20:48:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algeblocks-basic-mat-demo/sssssqpl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algeblocks-basic-mat-demo/sssssqpl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algeblocks-basic-mat-demo/sssssqpl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algeblocks-basic-mat-demo/sssssqpl"/>
      <lastmod>2026-11-01T20:48:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/medians-centroid-theorem-proof-without-words/sssssqpy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-centroid-theorem-proof-without-words/sssssqpy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-centroid-theorem-proof-without-words/sssssqpy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-centroid-theorem-proof-without-words/sssssqpy"/>
      <lastmod>2026-11-02T17:09:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/medians-centroid-theorem-proof-without-words/sssssqpy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-centroid-theorem-proof-without-words/sssssqpy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-centroid-theorem-proof-without-words/sssssqpy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-centroid-theorem-proof-without-words/sssssqpy"/>
      <lastmod>2026-11-02T17:09:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hcf-lcm-of-three-numbers-by-prime-factorization/sssssqpa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hcf-lcm-of-three-numbers-by-prime-factorization/sssssqpa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hcf-lcm-of-three-numbers-by-prime-factorization/sssssqpa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hcf-lcm-of-three-numbers-by-prime-factorization/sssssqpa"/>
      <lastmod>2026-11-02T18:33:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hcf-lcm-of-three-numbers-by-prime-factorization/sssssqpa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hcf-lcm-of-three-numbers-by-prime-factorization/sssssqpa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hcf-lcm-of-three-numbers-by-prime-factorization/sssssqpa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hcf-lcm-of-three-numbers-by-prime-factorization/sssssqpa"/>
      <lastmod>2026-11-02T18:33:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scatter-plot-and-line-of-best-fit/sssssqpc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scatter-plot-and-line-of-best-fit/sssssqpc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scatter-plot-and-line-of-best-fit/sssssqpc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scatter-plot-and-line-of-best-fit/sssssqpc"/>
      <lastmod>2026-11-02T13:03:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scatter-plot-and-line-of-best-fit/sssssqpc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scatter-plot-and-line-of-best-fit/sssssqpc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scatter-plot-and-line-of-best-fit/sssssqpc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scatter-plot-and-line-of-best-fit/sssssqpc"/>
      <lastmod>2026-11-02T13:03:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-of-quadratic-function/sssssqpr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-quadratic-function/sssssqpr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-quadratic-function/sssssqpr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-quadratic-function/sssssqpr"/>
      <lastmod>2026-11-02T17:06:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-of-quadratic-function/sssssqpr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-quadratic-function/sssssqpr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-quadratic-function/sssssqpr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-quadratic-function/sssssqpr"/>
      <lastmod>2026-11-02T17:06:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translations-of-sinusoidal-functions/sssssqph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-of-sinusoidal-functions/sssssqph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-of-sinusoidal-functions/sssssqph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-of-sinusoidal-functions/sssssqph"/>
      <lastmod>2026-11-02T02:41:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translations-of-sinusoidal-functions/sssssqph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-of-sinusoidal-functions/sssssqph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-of-sinusoidal-functions/sssssqph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-of-sinusoidal-functions/sssssqph"/>
      <lastmod>2026-11-02T02:41:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-template-scaffolded-discovery/sssssqpt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-template-scaffolded-discovery/sssssqpt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-template-scaffolded-discovery/sssssqpt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-template-scaffolded-discovery/sssssqpt"/>
      <lastmod>2026-11-01T21:46:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-template-scaffolded-discovery/sssssqpt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-template-scaffolded-discovery/sssssqpt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-template-scaffolded-discovery/sssssqpt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-template-scaffolded-discovery/sssssqpt"/>
      <lastmod>2026-11-01T21:46:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/magnus-effect-on-balloon-trajectory/sssssqpx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magnus-effect-on-balloon-trajectory/sssssqpx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magnus-effect-on-balloon-trajectory/sssssqpx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magnus-effect-on-balloon-trajectory/sssssqpx"/>
      <lastmod>2026-11-01T19:13:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/magnus-effect-on-balloon-trajectory/sssssqpx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magnus-effect-on-balloon-trajectory/sssssqpx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magnus-effect-on-balloon-trajectory/sssssqpx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magnus-effect-on-balloon-trajectory/sssssqpx"/>
      <lastmod>2026-11-01T19:13:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-compound-inequalities-by/sssssqpi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-compound-inequalities-by/sssssqpi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-compound-inequalities-by/sssssqpi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-compound-inequalities-by/sssssqpi"/>
      <lastmod>2026-11-01T21:22:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-compound-inequalities-by/sssssqpi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-compound-inequalities-by/sssssqpi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-compound-inequalities-by/sssssqpi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-compound-inequalities-by/sssssqpi"/>
      <lastmod>2026-11-01T21:22:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-symmetry-example/sssssqpo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-symmetry-example/sssssqpo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-symmetry-example/sssssqpo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-symmetry-example/sssssqpo"/>
      <lastmod>2026-11-02T02:53:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-symmetry-example/sssssqpo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-symmetry-example/sssssqpo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-symmetry-example/sssssqpo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-symmetry-example/sssssqpo"/>
      <lastmod>2026-11-02T02:53:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-construction-by-laurie/sssssqws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-construction-by-laurie/sssssqws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-construction-by-laurie/sssssqws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-construction-by-laurie/sssssqws"/>
      <lastmod>2026-11-02T17:09:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-construction-by-laurie/sssssqws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-construction-by-laurie/sssssqws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-construction-by-laurie/sssssqws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-construction-by-laurie/sssssqws"/>
      <lastmod>2026-11-02T17:09:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/changing-scales-in-scale-drawing-practice/sssssqw7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/changing-scales-in-scale-drawing-practice/sssssqw7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/changing-scales-in-scale-drawing-practice/sssssqw7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/changing-scales-in-scale-drawing-practice/sssssqw7"/>
      <lastmod>2026-11-01T20:33:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/changing-scales-in-scale-drawing-practice/sssssqw7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/changing-scales-in-scale-drawing-practice/sssssqw7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/changing-scales-in-scale-drawing-practice/sssssqw7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/changing-scales-in-scale-drawing-practice/sssssqw7"/>
      <lastmod>2026-11-01T20:33:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ap-stats-grade-simulator/sssssqwn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ap-stats-grade-simulator/sssssqwn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ap-stats-grade-simulator/sssssqwn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ap-stats-grade-simulator/sssssqwn"/>
      <lastmod>2026-11-01T23:24:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ap-stats-grade-simulator/sssssqwn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ap-stats-grade-simulator/sssssqwn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ap-stats-grade-simulator/sssssqwn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ap-stats-grade-simulator/sssssqwn"/>
      <lastmod>2026-11-01T23:24:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-properties-by-nelsone/sssssqw2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-properties-by-nelsone/sssssqw2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-properties-by-nelsone/sssssqw2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-properties-by-nelsone/sssssqw2"/>
      <lastmod>2026-11-02T17:40:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-properties-by-nelsone/sssssqw2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-properties-by-nelsone/sssssqw2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-properties-by-nelsone/sssssqw2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-properties-by-nelsone/sssssqw2"/>
      <lastmod>2026-11-02T17:40:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-of-a-line-by-guillermo-bautista/sssssqwk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-of-a-line-by-guillermo-bautista/sssssqwk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-of-a-line-by-guillermo-bautista/sssssqwk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-of-a-line-by-guillermo-bautista/sssssqwk"/>
      <lastmod>2026-11-01T23:11:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-of-a-line-by-guillermo-bautista/sssssqwk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-of-a-line-by-guillermo-bautista/sssssqwk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-of-a-line-by-guillermo-bautista/sssssqwk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-of-a-line-by-guillermo-bautista/sssssqwk"/>
      <lastmod>2026-11-01T23:11:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/new-pythagorean-theorem/sssssqwz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-pythagorean-theorem/sssssqwz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-pythagorean-theorem/sssssqwz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-pythagorean-theorem/sssssqwz"/>
      <lastmod>2026-11-01T21:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/new-pythagorean-theorem/sssssqwz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-pythagorean-theorem/sssssqwz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-pythagorean-theorem/sssssqwz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-pythagorean-theorem/sssssqwz"/>
      <lastmod>2026-11-01T21:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pure-quadratic-inequalities-demo/sssssqw0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pure-quadratic-inequalities-demo/sssssqw0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pure-quadratic-inequalities-demo/sssssqw0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pure-quadratic-inequalities-demo/sssssqw0"/>
      <lastmod>2026-11-02T13:52:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pure-quadratic-inequalities-demo/sssssqw0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pure-quadratic-inequalities-demo/sssssqw0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pure-quadratic-inequalities-demo/sssssqw0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pure-quadratic-inequalities-demo/sssssqw0"/>
      <lastmod>2026-11-02T13:52:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fermat-point-of-a-triangle/sssssqwd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fermat-point-of-a-triangle/sssssqwd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fermat-point-of-a-triangle/sssssqwd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fermat-point-of-a-triangle/sssssqwd"/>
      <lastmod>2026-11-01T21:50:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fermat-point-of-a-triangle/sssssqwd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fermat-point-of-a-triangle/sssssqwd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fermat-point-of-a-triangle/sssssqwd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fermat-point-of-a-triangle/sssssqwd"/>
      <lastmod>2026-11-01T21:50:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-function-graphs-by-dr-sedaghatjou/sssssqwf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-function-graphs-by-dr-sedaghatjou/sssssqwf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-function-graphs-by-dr-sedaghatjou/sssssqwf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-function-graphs-by-dr-sedaghatjou/sssssqwf"/>
      <lastmod>2026-11-01T21:42:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-function-graphs-by-dr-sedaghatjou/sssssqwf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-function-graphs-by-dr-sedaghatjou/sssssqwf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-function-graphs-by-dr-sedaghatjou/sssssqwf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-function-graphs-by-dr-sedaghatjou/sssssqwf"/>
      <lastmod>2026-11-01T21:42:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-geometric-intuition-and-construction/sssssqw8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-geometric-intuition-and-construction/sssssqw8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-geometric-intuition-and-construction/sssssqw8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-geometric-intuition-and-construction/sssssqw8"/>
      <lastmod>2026-11-02T00:35:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-geometric-intuition-and-construction/sssssqw8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-geometric-intuition-and-construction/sssssqw8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-geometric-intuition-and-construction/sssssqw8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-geometric-intuition-and-construction/sssssqw8"/>
      <lastmod>2026-11-02T00:35:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-polygon-combinations/sssssqwu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygon-combinations/sssssqwu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygon-combinations/sssssqwu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygon-combinations/sssssqwu"/>
      <lastmod>2026-11-01T23:32:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-polygon-combinations/sssssqwu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygon-combinations/sssssqwu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygon-combinations/sssssqwu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygon-combinations/sssssqwu"/>
      <lastmod>2026-11-01T23:32:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-and-transmission-of-a-pulse-wave/sssssqw5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-and-transmission-of-a-pulse-wave/sssssqw5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-and-transmission-of-a-pulse-wave/sssssqw5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-and-transmission-of-a-pulse-wave/sssssqw5"/>
      <lastmod>2026-11-02T02:47:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-and-transmission-of-a-pulse-wave/sssssqw5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-and-transmission-of-a-pulse-wave/sssssqw5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-and-transmission-of-a-pulse-wave/sssssqw5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-and-transmission-of-a-pulse-wave/sssssqw5"/>
      <lastmod>2026-11-02T02:47:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-curves-with-sine/sssssqwb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-curves-with-sine/sssssqwb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-curves-with-sine/sssssqwb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-curves-with-sine/sssssqwb"/>
      <lastmod>2026-11-02T16:32:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-curves-with-sine/sssssqwb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-curves-with-sine/sssssqwb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-curves-with-sine/sssssqwb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-curves-with-sine/sssssqwb"/>
      <lastmod>2026-11-02T16:32:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finite-torus-circle-network/sssssqw3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finite-torus-circle-network/sssssqw3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finite-torus-circle-network/sssssqw3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finite-torus-circle-network/sssssqw3"/>
      <lastmod>2026-11-02T16:41:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finite-torus-circle-network/sssssqw3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finite-torus-circle-network/sssssqw3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finite-torus-circle-network/sssssqw3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finite-torus-circle-network/sssssqw3"/>
      <lastmod>2026-11-02T16:41:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-triangular-prism-by-ogechi/sssssqwq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-triangular-prism-by-ogechi/sssssqwq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-triangular-prism-by-ogechi/sssssqwq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-triangular-prism-by-ogechi/sssssqwq"/>
      <lastmod>2026-11-02T00:03:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-triangular-prism-by-ogechi/sssssqwq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-triangular-prism-by-ogechi/sssssqwq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-triangular-prism-by-ogechi/sssssqwq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-triangular-prism-by-ogechi/sssssqwq"/>
      <lastmod>2026-11-02T00:03:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/composite-functions/sssssqw1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-functions/sssssqw1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-functions/sssssqw1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-functions/sssssqw1"/>
      <lastmod>2026-11-01T23:38:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/composite-functions/sssssqw1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-functions/sssssqw1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-functions/sssssqw1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-functions/sssssqw1"/>
      <lastmod>2026-11-01T23:38:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-equation-in-r-3/sssssqwm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-equation-in-r-3/sssssqwm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-equation-in-r-3/sssssqwm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-equation-in-r-3/sssssqwm"/>
      <lastmod>2026-11-01T21:13:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-equation-in-r-3/sssssqwm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-equation-in-r-3/sssssqwm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-equation-in-r-3/sssssqwm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-equation-in-r-3/sssssqwm"/>
      <lastmod>2026-11-01T21:13:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/signed-addition-subtraction/sssssqwj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/signed-addition-subtraction/sssssqwj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/signed-addition-subtraction/sssssqwj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/signed-addition-subtraction/sssssqwj"/>
      <lastmod>2026-11-02T17:00:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/signed-addition-subtraction/sssssqwj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/signed-addition-subtraction/sssssqwj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/signed-addition-subtraction/sssssqwj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/signed-addition-subtraction/sssssqwj"/>
      <lastmod>2026-11-02T17:00:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cuboid-net-demonstration/sssssqwp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-net-demonstration/sssssqwp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-net-demonstration/sssssqwp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-net-demonstration/sssssqwp"/>
      <lastmod>2026-11-02T16:56:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cuboid-net-demonstration/sssssqwp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-net-demonstration/sssssqwp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-net-demonstration/sssssqwp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-net-demonstration/sssssqwp"/>
      <lastmod>2026-11-02T16:56:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-folding-by-chris-cambr/sssssqww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-folding-by-chris-cambr/sssssqww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-folding-by-chris-cambr/sssssqww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-folding-by-chris-cambr/sssssqww"/>
      <lastmod>2026-11-02T18:35:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-folding-by-chris-cambr/sssssqww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-folding-by-chris-cambr/sssssqww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-folding-by-chris-cambr/sssssqww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-folding-by-chris-cambr/sssssqww"/>
      <lastmod>2026-11-02T18:35:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-by-jamie-hansen/sssssqw6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-by-jamie-hansen/sssssqw6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions-by-jamie-hansen/sssssqw6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-by-jamie-hansen/sssssqw6"/>
      <lastmod>2026-11-02T13:08:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions-by-jamie-hansen/sssssqw6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-by-jamie-hansen/sssssqw6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions-by-jamie-hansen/sssssqw6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-by-jamie-hansen/sssssqw6"/>
      <lastmod>2026-11-02T13:08:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lines-connecting-midpoints-of-parallel-chords-in-an-ellipse/sssssqwg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-connecting-midpoints-of-parallel-chords-in-an-ellipse/sssssqwg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-connecting-midpoints-of-parallel-chords-in-an-ellipse/sssssqwg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-connecting-midpoints-of-parallel-chords-in-an-ellipse/sssssqwg"/>
      <lastmod>2026-11-02T10:55:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lines-connecting-midpoints-of-parallel-chords-in-an-ellipse/sssssqwg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-connecting-midpoints-of-parallel-chords-in-an-ellipse/sssssqwg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-connecting-midpoints-of-parallel-chords-in-an-ellipse/sssssqwg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-connecting-midpoints-of-parallel-chords-in-an-ellipse/sssssqwg"/>
      <lastmod>2026-11-02T10:55:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unequal-probability-demonstration/sssssqw9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unequal-probability-demonstration/sssssqw9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unequal-probability-demonstration/sssssqw9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unequal-probability-demonstration/sssssqw9"/>
      <lastmod>2026-11-02T18:39:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unequal-probability-demonstration/sssssqw9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unequal-probability-demonstration/sssssqw9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unequal-probability-demonstration/sssssqw9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unequal-probability-demonstration/sssssqw9"/>
      <lastmod>2026-11-02T18:39:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-sum-of-interior-and-exterior-angles-of-polygons/sssssqwe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-sum-of-interior-and-exterior-angles-of-polygons/sssssqwe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-sum-of-interior-and-exterior-angles-of-polygons/sssssqwe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-sum-of-interior-and-exterior-angles-of-polygons/sssssqwe"/>
      <lastmod>2026-11-02T18:39:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-sum-of-interior-and-exterior-angles-of-polygons/sssssqwe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-sum-of-interior-and-exterior-angles-of-polygons/sssssqwe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-sum-of-interior-and-exterior-angles-of-polygons/sssssqwe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-sum-of-interior-and-exterior-angles-of-polygons/sssssqwe"/>
      <lastmod>2026-11-02T18:39:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-a-triangle-with-given-side-lengths/sssssqwv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-triangle-with-given-side-lengths/sssssqwv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-triangle-with-given-side-lengths/sssssqwv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-triangle-with-given-side-lengths/sssssqwv"/>
      <lastmod>2026-11-01T19:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-a-triangle-with-given-side-lengths/sssssqwv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-triangle-with-given-side-lengths/sssssqwv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-triangle-with-given-side-lengths/sssssqwv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-triangle-with-given-side-lengths/sssssqwv"/>
      <lastmod>2026-11-01T19:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-the-first-n-terms-of-an-arithmetic-sequence/sssssqw4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-the-first-n-terms-of-an-arithmetic-sequence/sssssqw4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-the-first-n-terms-of-an-arithmetic-sequence/sssssqw4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-the-first-n-terms-of-an-arithmetic-sequence/sssssqw4"/>
      <lastmod>2026-11-01T23:26:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-the-first-n-terms-of-an-arithmetic-sequence/sssssqw4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-the-first-n-terms-of-an-arithmetic-sequence/sssssqw4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-the-first-n-terms-of-an-arithmetic-sequence/sssssqw4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-the-first-n-terms-of-an-arithmetic-sequence/sssssqw4"/>
      <lastmod>2026-11-01T23:26:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/blueprint-equation-of-a-line/sssssqwl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/blueprint-equation-of-a-line/sssssqwl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/blueprint-equation-of-a-line/sssssqwl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/blueprint-equation-of-a-line/sssssqwl"/>
      <lastmod>2026-11-01T21:22:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/blueprint-equation-of-a-line/sssssqwl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/blueprint-equation-of-a-line/sssssqwl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/blueprint-equation-of-a-line/sssssqwl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/blueprint-equation-of-a-line/sssssqwl"/>
      <lastmod>2026-11-01T21:22:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/holiday-geometric-modeling/sssssqwy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/holiday-geometric-modeling/sssssqwy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/holiday-geometric-modeling/sssssqwy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/holiday-geometric-modeling/sssssqwy"/>
      <lastmod>2026-11-02T17:51:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/holiday-geometric-modeling/sssssqwy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/holiday-geometric-modeling/sssssqwy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/holiday-geometric-modeling/sssssqwy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/holiday-geometric-modeling/sssssqwy"/>
      <lastmod>2026-11-02T17:51:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/total-differential-visualization-boas-ch-4-fig-3-2/sssssqwa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/total-differential-visualization-boas-ch-4-fig-3-2/sssssqwa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/total-differential-visualization-boas-ch-4-fig-3-2/sssssqwa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/total-differential-visualization-boas-ch-4-fig-3-2/sssssqwa"/>
      <lastmod>2026-11-01T21:26:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/total-differential-visualization-boas-ch-4-fig-3-2/sssssqwa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/total-differential-visualization-boas-ch-4-fig-3-2/sssssqwa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/total-differential-visualization-boas-ch-4-fig-3-2/sssssqwa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/total-differential-visualization-boas-ch-4-fig-3-2/sssssqwa"/>
      <lastmod>2026-11-01T21:26:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-geometric-construction/sssssqwc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-geometric-construction/sssssqwc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-geometric-construction/sssssqwc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-geometric-construction/sssssqwc"/>
      <lastmod>2026-11-02T15:05:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-geometric-construction/sssssqwc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-geometric-construction/sssssqwc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-geometric-construction/sssssqwc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-geometric-construction/sssssqwc"/>
      <lastmod>2026-11-02T15:05:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/60-degree-sector-surprise/sssssqwr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/60-degree-sector-surprise/sssssqwr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/60-degree-sector-surprise/sssssqwr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/60-degree-sector-surprise/sssssqwr"/>
      <lastmod>2026-11-02T18:54:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/60-degree-sector-surprise/sssssqwr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/60-degree-sector-surprise/sssssqwr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/60-degree-sector-surprise/sssssqwr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/60-degree-sector-surprise/sssssqwr"/>
      <lastmod>2026-11-02T18:54:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-an-equilateral-triangle-by-david-wees/sssssqwh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-an-equilateral-triangle-by-david-wees/sssssqwh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-an-equilateral-triangle-by-david-wees/sssssqwh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-an-equilateral-triangle-by-david-wees/sssssqwh"/>
      <lastmod>2026-11-02T02:56:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-an-equilateral-triangle-by-david-wees/sssssqwh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-an-equilateral-triangle-by-david-wees/sssssqwh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-an-equilateral-triangle-by-david-wees/sssssqwh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-an-equilateral-triangle-by-david-wees/sssssqwh"/>
      <lastmod>2026-11-02T02:56:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-trigonometry/sssssqwt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-trigonometry/sssssqwt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-trigonometry/sssssqwt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-trigonometry/sssssqwt"/>
      <lastmod>2026-11-02T11:59:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-trigonometry/sssssqwt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-trigonometry/sssssqwt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-trigonometry/sssssqwt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-trigonometry/sssssqwt"/>
      <lastmod>2026-11-02T11:59:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-an-ellipse-geometric-construction-with-circles-and-lines-m-tsilp/sssssqwx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-an-ellipse-geometric-construction-with-circles-and-lines-m-tsilp/sssssqwx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-an-ellipse-geometric-construction-with-circles-and-lines-m-tsilp/sssssqwx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-an-ellipse-geometric-construction-with-circles-and-lines-m-tsilp/sssssqwx"/>
      <lastmod>2026-11-02T16:44:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-an-ellipse-geometric-construction-with-circles-and-lines-m-tsilp/sssssqwx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-an-ellipse-geometric-construction-with-circles-and-lines-m-tsilp/sssssqwx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-an-ellipse-geometric-construction-with-circles-and-lines-m-tsilp/sssssqwx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-an-ellipse-geometric-construction-with-circles-and-lines-m-tsilp/sssssqwx"/>
      <lastmod>2026-11-02T16:44:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-speed-time-relationship-demo/sssssqwi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-speed-time-relationship-demo/sssssqwi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-speed-time-relationship-demo/sssssqwi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-speed-time-relationship-demo/sssssqwi"/>
      <lastmod>2026-11-01T23:41:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-speed-time-relationship-demo/sssssqwi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-speed-time-relationship-demo/sssssqwi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-speed-time-relationship-demo/sssssqwi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-speed-time-relationship-demo/sssssqwi"/>
      <lastmod>2026-11-01T23:41:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-cylindrical-shells/sssssqwo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-cylindrical-shells/sssssqwo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-cylindrical-shells/sssssqwo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-cylindrical-shells/sssssqwo"/>
      <lastmod>2026-11-02T13:43:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-cylindrical-shells/sssssqwo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-cylindrical-shells/sssssqwo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-cylindrical-shells/sssssqwo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-cylindrical-shells/sssssqwo"/>
      <lastmod>2026-11-02T13:43:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hypotenuse-leg-congruence-investigation/sssssq6s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypotenuse-leg-congruence-investigation/sssssq6s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypotenuse-leg-congruence-investigation/sssssq6s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypotenuse-leg-congruence-investigation/sssssq6s"/>
      <lastmod>2026-11-02T10:52:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hypotenuse-leg-congruence-investigation/sssssq6s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypotenuse-leg-congruence-investigation/sssssq6s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypotenuse-leg-congruence-investigation/sssssq6s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypotenuse-leg-congruence-investigation/sssssq6s"/>
      <lastmod>2026-11-02T10:52:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-visualization-of-fractions-and-percentages/sssssq67</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-visualization-of-fractions-and-percentages/sssssq67"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-visualization-of-fractions-and-percentages/sssssq67"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-visualization-of-fractions-and-percentages/sssssq67"/>
      <lastmod>2026-11-02T16:34:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-visualization-of-fractions-and-percentages/sssssq67</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-visualization-of-fractions-and-percentages/sssssq67"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-visualization-of-fractions-and-percentages/sssssq67"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-visualization-of-fractions-and-percentages/sssssq67"/>
      <lastmod>2026-11-02T16:34:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometric-illustration/sssssq6n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration/sssssq6n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-illustration/sssssq6n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration/sssssq6n"/>
      <lastmod>2026-11-02T12:21:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometric-illustration/sssssq6n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration/sssssq6n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-illustration/sssssq6n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration/sssssq6n"/>
      <lastmod>2026-11-02T12:21:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/product-of-numbers-on-two-spinners/sssssq62</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/product-of-numbers-on-two-spinners/sssssq62"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/product-of-numbers-on-two-spinners/sssssq62"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/product-of-numbers-on-two-spinners/sssssq62"/>
      <lastmod>2026-11-02T18:20:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/product-of-numbers-on-two-spinners/sssssq62</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/product-of-numbers-on-two-spinners/sssssq62"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/product-of-numbers-on-two-spinners/sssssq62"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/product-of-numbers-on-two-spinners/sssssq62"/>
      <lastmod>2026-11-02T18:20:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/blackbody-radiation-planck-s-law-demo/sssssq6k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/blackbody-radiation-planck-s-law-demo/sssssq6k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/blackbody-radiation-planck-s-law-demo/sssssq6k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/blackbody-radiation-planck-s-law-demo/sssssq6k"/>
      <lastmod>2026-11-01T21:24:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/blackbody-radiation-planck-s-law-demo/sssssq6k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/blackbody-radiation-planck-s-law-demo/sssssq6k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/blackbody-radiation-planck-s-law-demo/sssssq6k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/blackbody-radiation-planck-s-law-demo/sssssq6k"/>
      <lastmod>2026-11-01T21:24:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-the-pythagorean-theorem/sssssq6z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-the-pythagorean-theorem/sssssq6z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-the-pythagorean-theorem/sssssq6z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-the-pythagorean-theorem/sssssq6z"/>
      <lastmod>2026-11-01T20:12:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-the-pythagorean-theorem/sssssq6z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-the-pythagorean-theorem/sssssq6z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-the-pythagorean-theorem/sssssq6z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-the-pythagorean-theorem/sssssq6z"/>
      <lastmod>2026-11-01T20:12:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/0-13-multiplied-by-10/sssssq60</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/0-13-multiplied-by-10/sssssq60"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/0-13-multiplied-by-10/sssssq60"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/0-13-multiplied-by-10/sssssq60"/>
      <lastmod>2026-11-02T02:37:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/0-13-multiplied-by-10/sssssq60</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/0-13-multiplied-by-10/sssssq60"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/0-13-multiplied-by-10/sssssq60"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/0-13-multiplied-by-10/sssssq60"/>
      <lastmod>2026-11-02T02:37:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/order-of-operations-addition-multiplication-and-division/sssssq6d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/order-of-operations-addition-multiplication-and-division/sssssq6d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/order-of-operations-addition-multiplication-and-division/sssssq6d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/order-of-operations-addition-multiplication-and-division/sssssq6d"/>
      <lastmod>2026-11-02T18:20:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/order-of-operations-addition-multiplication-and-division/sssssq6d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/order-of-operations-addition-multiplication-and-division/sssssq6d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/order-of-operations-addition-multiplication-and-division/sssssq6d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/order-of-operations-addition-multiplication-and-division/sssssq6d"/>
      <lastmod>2026-11-02T18:20:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-multiplication-demo/sssssq6f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-multiplication-demo/sssssq6f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-multiplication-demo/sssssq6f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-multiplication-demo/sssssq6f"/>
      <lastmod>2026-11-01T21:18:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-multiplication-demo/sssssq6f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-multiplication-demo/sssssq6f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-multiplication-demo/sssssq6f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-multiplication-demo/sssssq6f"/>
      <lastmod>2026-11-01T21:18:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-properties-exploration/sssssq68</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-properties-exploration/sssssq68"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-properties-exploration/sssssq68"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-properties-exploration/sssssq68"/>
      <lastmod>2026-11-02T16:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-properties-exploration/sssssq68</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-properties-exploration/sssssq68"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-properties-exploration/sssssq68"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-properties-exploration/sssssq68"/>
      <lastmod>2026-11-02T16:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-in-a-line-by-nadezhda-konstantinova/sssssq6u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-a-line-by-nadezhda-konstantinova/sssssq6u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-a-line-by-nadezhda-konstantinova/sssssq6u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-a-line-by-nadezhda-konstantinova/sssssq6u"/>
      <lastmod>2026-11-02T15:48:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-in-a-line-by-nadezhda-konstantinova/sssssq6u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-a-line-by-nadezhda-konstantinova/sssssq6u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-a-line-by-nadezhda-konstantinova/sssssq6u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-a-line-by-nadezhda-konstantinova/sssssq6u"/>
      <lastmod>2026-11-02T15:48:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/math-art-trace-of-balls-in-the-ellipsoidal-billiard/sssssq65</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-art-trace-of-balls-in-the-ellipsoidal-billiard/sssssq65"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-art-trace-of-balls-in-the-ellipsoidal-billiard/sssssq65"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-art-trace-of-balls-in-the-ellipsoidal-billiard/sssssq65"/>
      <lastmod>2026-11-01T19:14:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/math-art-trace-of-balls-in-the-ellipsoidal-billiard/sssssq65</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-art-trace-of-balls-in-the-ellipsoidal-billiard/sssssq65"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-art-trace-of-balls-in-the-ellipsoidal-billiard/sssssq65"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-art-trace-of-balls-in-the-ellipsoidal-billiard/sssssq65"/>
      <lastmod>2026-11-01T19:14:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-and-unit-circle/sssssq6b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-and-unit-circle/sssssq6b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-and-unit-circle/sssssq6b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-and-unit-circle/sssssq6b"/>
      <lastmod>2026-11-01T19:35:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-and-unit-circle/sssssq6b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-and-unit-circle/sssssq6b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-and-unit-circle/sssssq6b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-and-unit-circle/sssssq6b"/>
      <lastmod>2026-11-01T19:35:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/writing-linear-equations-from-graphs/sssssq63</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-linear-equations-from-graphs/sssssq63"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-linear-equations-from-graphs/sssssq63"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-linear-equations-from-graphs/sssssq63"/>
      <lastmod>2026-11-01T19:20:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/writing-linear-equations-from-graphs/sssssq63</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-linear-equations-from-graphs/sssssq63"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-linear-equations-from-graphs/sssssq63"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-linear-equations-from-graphs/sssssq63"/>
      <lastmod>2026-11-01T19:20:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-symmetry-and-translation-with-cutouts-and-folds/sssssq6q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-symmetry-and-translation-with-cutouts-and-folds/sssssq6q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-symmetry-and-translation-with-cutouts-and-folds/sssssq6q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-symmetry-and-translation-with-cutouts-and-folds/sssssq6q"/>
      <lastmod>2026-11-01T19:22:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-symmetry-and-translation-with-cutouts-and-folds/sssssq6q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-symmetry-and-translation-with-cutouts-and-folds/sssssq6q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-symmetry-and-translation-with-cutouts-and-folds/sssssq6q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-symmetry-and-translation-with-cutouts-and-folds/sssssq6q"/>
      <lastmod>2026-11-01T19:22:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-sas-dynamic-demonstration/sssssq61</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-sas-dynamic-demonstration/sssssq61"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-sas-dynamic-demonstration/sssssq61"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-sas-dynamic-demonstration/sssssq61"/>
      <lastmod>2026-11-02T17:47:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-sas-dynamic-demonstration/sssssq61</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-sas-dynamic-demonstration/sssssq61"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-sas-dynamic-demonstration/sssssq61"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-sas-dynamic-demonstration/sssssq61"/>
      <lastmod>2026-11-02T17:47:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-solid-volume-around-x-and-y-axes/sssssq6m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-solid-volume-around-x-and-y-axes/sssssq6m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-solid-volume-around-x-and-y-axes/sssssq6m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-solid-volume-around-x-and-y-axes/sssssq6m"/>
      <lastmod>2026-11-02T03:19:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-solid-volume-around-x-and-y-axes/sssssq6m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-solid-volume-around-x-and-y-axes/sssssq6m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-solid-volume-around-x-and-y-axes/sssssq6m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-solid-volume-around-x-and-y-axes/sssssq6m"/>
      <lastmod>2026-11-02T03:19:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-model-for-quadratic-functions/sssssq6j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-model-for-quadratic-functions/sssssq6j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-model-for-quadratic-functions/sssssq6j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-model-for-quadratic-functions/sssssq6j"/>
      <lastmod>2026-11-02T11:44:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-model-for-quadratic-functions/sssssq6j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-model-for-quadratic-functions/sssssq6j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-model-for-quadratic-functions/sssssq6j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-model-for-quadratic-functions/sssssq6j"/>
      <lastmod>2026-11-02T11:44:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-components-demo/sssssq6p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-components-demo/sssssq6p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-components-demo/sssssq6p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-components-demo/sssssq6p"/>
      <lastmod>2026-11-01T21:27:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-components-demo/sssssq6p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-components-demo/sssssq6p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-components-demo/sssssq6p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-components-demo/sssssq6p"/>
      <lastmod>2026-11-01T21:27:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-root-equation-demo/sssssq6w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-equation-demo/sssssq6w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-equation-demo/sssssq6w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-equation-demo/sssssq6w"/>
      <lastmod>2026-11-02T18:46:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-root-equation-demo/sssssq6w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-equation-demo/sssssq6w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-equation-demo/sssssq6w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-equation-demo/sssssq6w"/>
      <lastmod>2026-11-02T18:46:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-by-dali-lemonjava/sssssq66</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-by-dali-lemonjava/sssssq66"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-by-dali-lemonjava/sssssq66"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-by-dali-lemonjava/sssssq66"/>
      <lastmod>2026-11-02T13:14:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-by-dali-lemonjava/sssssq66</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-by-dali-lemonjava/sssssq66"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-by-dali-lemonjava/sssssq66"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-by-dali-lemonjava/sssssq66"/>
      <lastmod>2026-11-02T13:14:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shadow-of-a-sphere/sssssq6g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shadow-of-a-sphere/sssssq6g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shadow-of-a-sphere/sssssq6g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shadow-of-a-sphere/sssssq6g"/>
      <lastmod>2026-11-02T18:54:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shadow-of-a-sphere/sssssq6g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shadow-of-a-sphere/sssssq6g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shadow-of-a-sphere/sssssq6g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shadow-of-a-sphere/sssssq6g"/>
      <lastmod>2026-11-02T18:54:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-quiz-by-tim-brzezinski/sssssq69</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-quiz-by-tim-brzezinski/sssssq69"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-quiz-by-tim-brzezinski/sssssq69"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-quiz-by-tim-brzezinski/sssssq69"/>
      <lastmod>2026-11-01T23:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-quiz-by-tim-brzezinski/sssssq69</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-quiz-by-tim-brzezinski/sssssq69"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-quiz-by-tim-brzezinski/sssssq69"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-quiz-by-tim-brzezinski/sssssq69"/>
      <lastmod>2026-11-01T23:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-and-tangent-lines/sssssq6e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-and-tangent-lines/sssssq6e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-and-tangent-lines/sssssq6e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-and-tangent-lines/sssssq6e"/>
      <lastmod>2026-11-02T17:11:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-and-tangent-lines/sssssq6e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-and-tangent-lines/sssssq6e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-and-tangent-lines/sssssq6e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-and-tangent-lines/sssssq6e"/>
      <lastmod>2026-11-02T17:11:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-terms-and-constructions/sssssq6v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-terms-and-constructions/sssssq6v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-terms-and-constructions/sssssq6v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-terms-and-constructions/sssssq6v"/>
      <lastmod>2026-11-02T18:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-terms-and-constructions/sssssq6v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-terms-and-constructions/sssssq6v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-terms-and-constructions/sssssq6v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-terms-and-constructions/sssssq6v"/>
      <lastmod>2026-11-02T18:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proper-partial-fractions-with-3-distinct-linear-factors/sssssq64</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proper-partial-fractions-with-3-distinct-linear-factors/sssssq64"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proper-partial-fractions-with-3-distinct-linear-factors/sssssq64"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proper-partial-fractions-with-3-distinct-linear-factors/sssssq64"/>
      <lastmod>2026-11-02T18:48:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proper-partial-fractions-with-3-distinct-linear-factors/sssssq64</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proper-partial-fractions-with-3-distinct-linear-factors/sssssq64"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proper-partial-fractions-with-3-distinct-linear-factors/sssssq64"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proper-partial-fractions-with-3-distinct-linear-factors/sssssq64"/>
      <lastmod>2026-11-02T18:48:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/focus-directrix-definition-of-an-ellipse/sssssq6l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focus-directrix-definition-of-an-ellipse/sssssq6l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focus-directrix-definition-of-an-ellipse/sssssq6l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focus-directrix-definition-of-an-ellipse/sssssq6l"/>
      <lastmod>2026-11-02T13:19:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/focus-directrix-definition-of-an-ellipse/sssssq6l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focus-directrix-definition-of-an-ellipse/sssssq6l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focus-directrix-definition-of-an-ellipse/sssssq6l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focus-directrix-definition-of-an-ellipse/sssssq6l"/>
      <lastmod>2026-11-02T13:19:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-sine-of-angle-sum/sssssq6y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-of-angle-sum/sssssq6y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-sine-of-angle-sum/sssssq6y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-of-angle-sum/sssssq6y"/>
      <lastmod>2026-11-01T23:35:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-sine-of-angle-sum/sssssq6y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-of-angle-sum/sssssq6y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-sine-of-angle-sum/sssssq6y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-of-angle-sum/sssssq6y"/>
      <lastmod>2026-11-01T23:35:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-from-parallel-to-perpendicular/sssssq6a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-from-parallel-to-perpendicular/sssssq6a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-from-parallel-to-perpendicular/sssssq6a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-from-parallel-to-perpendicular/sssssq6a"/>
      <lastmod>2026-11-01T20:56:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-from-parallel-to-perpendicular/sssssq6a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-from-parallel-to-perpendicular/sssssq6a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-from-parallel-to-perpendicular/sssssq6a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-from-parallel-to-perpendicular/sssssq6a"/>
      <lastmod>2026-11-01T20:56:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-addition-with-vectors/sssssq6c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-with-vectors/sssssq6c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-with-vectors/sssssq6c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-with-vectors/sssssq6c"/>
      <lastmod>2026-11-02T12:04:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-addition-with-vectors/sssssq6c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-with-vectors/sssssq6c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-with-vectors/sssssq6c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-with-vectors/sssssq6c"/>
      <lastmod>2026-11-02T12:04:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersections/sssssq6r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersections/sssssq6r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersections/sssssq6r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersections/sssssq6r"/>
      <lastmod>2026-11-01T21:52:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersections/sssssq6r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersections/sssssq6r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersections/sssssq6r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersections/sssssq6r"/>
      <lastmod>2026-11-01T21:52:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-construction-and-face-analysis/sssssq6h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-construction-and-face-analysis/sssssq6h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-construction-and-face-analysis/sssssq6h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-construction-and-face-analysis/sssssq6h"/>
      <lastmod>2026-11-02T02:50:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-construction-and-face-analysis/sssssq6h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-construction-and-face-analysis/sssssq6h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-construction-and-face-analysis/sssssq6h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-construction-and-face-analysis/sssssq6h"/>
      <lastmod>2026-11-02T02:50:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/medians-and-centroid-by-mr-lee-2/sssssq6t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-and-centroid-by-mr-lee-2/sssssq6t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-and-centroid-by-mr-lee-2/sssssq6t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-and-centroid-by-mr-lee-2/sssssq6t"/>
      <lastmod>2026-11-02T17:41:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/medians-and-centroid-by-mr-lee-2/sssssq6t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-and-centroid-by-mr-lee-2/sssssq6t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-and-centroid-by-mr-lee-2/sssssq6t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-and-centroid-by-mr-lee-2/sssssq6t"/>
      <lastmod>2026-11-02T17:41:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-construction-by-tori-charmoli/sssssq6x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-tori-charmoli/sssssq6x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-by-tori-charmoli/sssssq6x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-tori-charmoli/sssssq6x"/>
      <lastmod>2026-11-02T17:13:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-construction-by-tori-charmoli/sssssq6x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-tori-charmoli/sssssq6x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-by-tori-charmoli/sssssq6x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-tori-charmoli/sssssq6x"/>
      <lastmod>2026-11-02T17:13:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-for-similar-shapes/sssssq6i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-for-similar-shapes/sssssq6i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-for-similar-shapes/sssssq6i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-for-similar-shapes/sssssq6i"/>
      <lastmod>2026-11-01T21:56:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-for-similar-shapes/sssssq6i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-for-similar-shapes/sssssq6i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-for-similar-shapes/sssssq6i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-for-similar-shapes/sssssq6i"/>
      <lastmod>2026-11-01T21:56:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/confidence-interval-game/sssssq6o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-game/sssssq6o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-game/sssssq6o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-game/sssssq6o"/>
      <lastmod>2026-11-02T02:52:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/confidence-interval-game/sssssq6o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-game/sssssq6o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-game/sssssq6o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-game/sssssq6o"/>
      <lastmod>2026-11-02T02:52:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-dilations-by-raluca-radu/sssssqgs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-dilations-by-raluca-radu/sssssqgs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-dilations-by-raluca-radu/sssssqgs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-dilations-by-raluca-radu/sssssqgs"/>
      <lastmod>2026-11-02T18:37:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-dilations-by-raluca-radu/sssssqgs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-dilations-by-raluca-radu/sssssqgs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-dilations-by-raluca-radu/sssssqgs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-dilations-by-raluca-radu/sssssqgs"/>
      <lastmod>2026-11-02T18:37:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-transformations-by-vincent-shuali/sssssqg7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-transformations-by-vincent-shuali/sssssqg7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-transformations-by-vincent-shuali/sssssqg7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-transformations-by-vincent-shuali/sssssqg7"/>
      <lastmod>2026-11-02T00:26:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-transformations-by-vincent-shuali/sssssqg7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-transformations-by-vincent-shuali/sssssqg7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-transformations-by-vincent-shuali/sssssqg7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-transformations-by-vincent-shuali/sssssqg7"/>
      <lastmod>2026-11-02T00:26:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/writing-a-complex-number-in-modulus-argument-form/sssssqgn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-a-complex-number-in-modulus-argument-form/sssssqgn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-a-complex-number-in-modulus-argument-form/sssssqgn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-a-complex-number-in-modulus-argument-form/sssssqgn"/>
      <lastmod>2026-11-01T20:17:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/writing-a-complex-number-in-modulus-argument-form/sssssqgn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-a-complex-number-in-modulus-argument-form/sssssqgn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-a-complex-number-in-modulus-argument-form/sssssqgn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-a-complex-number-in-modulus-argument-form/sssssqgn"/>
      <lastmod>2026-11-01T20:17:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-and-perimeter-of-building/sssssqg2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-building/sssssqg2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-building/sssssqg2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-building/sssssqg2"/>
      <lastmod>2026-11-02T17:05:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-and-perimeter-of-building/sssssqg2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-building/sssssqg2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-building/sssssqg2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-building/sssssqg2"/>
      <lastmod>2026-11-02T17:05:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spheres-problem/sssssqgk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheres-problem/sssssqgk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheres-problem/sssssqgk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheres-problem/sssssqgk"/>
      <lastmod>2026-11-02T16:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spheres-problem/sssssqgk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheres-problem/sssssqgk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheres-problem/sssssqgk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheres-problem/sssssqgk"/>
      <lastmod>2026-11-02T16:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/creating-cubes/sssssqgz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-cubes/sssssqgz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-cubes/sssssqgz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-cubes/sssssqgz"/>
      <lastmod>2026-11-02T17:15:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/creating-cubes/sssssqgz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-cubes/sssssqgz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-cubes/sssssqgz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-cubes/sssssqgz"/>
      <lastmod>2026-11-02T17:15:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-perimeter-interactive-polygon-measurement-tool/sssssqg0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-perimeter-interactive-polygon-measurement-tool/sssssqg0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-perimeter-interactive-polygon-measurement-tool/sssssqg0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-perimeter-interactive-polygon-measurement-tool/sssssqg0"/>
      <lastmod>2026-11-02T18:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-perimeter-interactive-polygon-measurement-tool/sssssqg0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-perimeter-interactive-polygon-measurement-tool/sssssqg0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-perimeter-interactive-polygon-measurement-tool/sssssqg0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-perimeter-interactive-polygon-measurement-tool/sssssqg0"/>
      <lastmod>2026-11-02T18:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copy-an-angle-by-michelle-jones/sssssqgd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-an-angle-by-michelle-jones/sssssqgd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-an-angle-by-michelle-jones/sssssqgd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-an-angle-by-michelle-jones/sssssqgd"/>
      <lastmod>2026-11-01T21:22:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copy-an-angle-by-michelle-jones/sssssqgd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-an-angle-by-michelle-jones/sssssqgd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-an-angle-by-michelle-jones/sssssqgd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-an-angle-by-michelle-jones/sssssqgd"/>
      <lastmod>2026-11-01T21:22:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-dpsingh/sssssqgf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-dpsingh/sssssqgf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curved-surface-area-of-cones-by-dpsingh/sssssqgf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-dpsingh/sssssqgf"/>
      <lastmod>2026-11-02T18:27:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curved-surface-area-of-cones-by-dpsingh/sssssqgf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-dpsingh/sssssqgf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curved-surface-area-of-cones-by-dpsingh/sssssqgf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-dpsingh/sssssqgf"/>
      <lastmod>2026-11-02T18:27:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-angles-with-rotations/sssssqg8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-angles-with-rotations/sssssqg8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-angles-with-rotations/sssssqg8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-angles-with-rotations/sssssqg8"/>
      <lastmod>2026-11-01T19:24:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-angles-with-rotations/sssssqg8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-angles-with-rotations/sssssqg8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-angles-with-rotations/sssssqg8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-angles-with-rotations/sssssqg8"/>
      <lastmod>2026-11-01T19:24:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/miracle-matrices-6x6/sssssqgu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/miracle-matrices-6x6/sssssqgu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/miracle-matrices-6x6/sssssqgu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/miracle-matrices-6x6/sssssqgu"/>
      <lastmod>2026-11-02T18:53:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/miracle-matrices-6x6/sssssqgu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/miracle-matrices-6x6/sssssqgu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/miracle-matrices-6x6/sssssqgu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/miracle-matrices-6x6/sssssqgu"/>
      <lastmod>2026-11-02T18:53:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curve-stitching-with-polygons/sssssqg5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching-with-polygons/sssssqg5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-with-polygons/sssssqg5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching-with-polygons/sssssqg5"/>
      <lastmod>2026-11-02T00:19:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curve-stitching-with-polygons/sssssqg5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching-with-polygons/sssssqg5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-with-polygons/sssssqg5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching-with-polygons/sssssqg5"/>
      <lastmod>2026-11-02T00:19:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthogonal-projection-of-v-over-u/sssssqgb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthogonal-projection-of-v-over-u/sssssqgb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthogonal-projection-of-v-over-u/sssssqgb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthogonal-projection-of-v-over-u/sssssqgb"/>
      <lastmod>2026-11-01T21:26:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthogonal-projection-of-v-over-u/sssssqgb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthogonal-projection-of-v-over-u/sssssqgb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthogonal-projection-of-v-over-u/sssssqgb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthogonal-projection-of-v-over-u/sssssqgb"/>
      <lastmod>2026-11-01T21:26:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-between-curves-by-kim-vanderspek/sssssqg3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-between-curves-by-kim-vanderspek/sssssqg3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-between-curves-by-kim-vanderspek/sssssqg3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-between-curves-by-kim-vanderspek/sssssqg3"/>
      <lastmod>2026-11-02T14:58:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-between-curves-by-kim-vanderspek/sssssqg3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-between-curves-by-kim-vanderspek/sssssqg3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-between-curves-by-kim-vanderspek/sssssqg3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-between-curves-by-kim-vanderspek/sssssqg3"/>
      <lastmod>2026-11-02T14:58:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-changing-slope-affects-a-linear-relation/sssssqgq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-changing-slope-affects-a-linear-relation/sssssqgq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-changing-slope-affects-a-linear-relation/sssssqgq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-changing-slope-affects-a-linear-relation/sssssqgq"/>
      <lastmod>2026-11-02T09:33:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-changing-slope-affects-a-linear-relation/sssssqgq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-changing-slope-affects-a-linear-relation/sssssqgq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-changing-slope-affects-a-linear-relation/sssssqgq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-changing-slope-affects-a-linear-relation/sssssqgq"/>
      <lastmod>2026-11-02T09:33:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-matrix-about-line-y-xtan-c/sssssqg1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-matrix-about-line-y-xtan-c/sssssqg1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-matrix-about-line-y-xtan-c/sssssqg1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-matrix-about-line-y-xtan-c/sssssqg1"/>
      <lastmod>2026-11-01T23:12:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-matrix-about-line-y-xtan-c/sssssqg1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-matrix-about-line-y-xtan-c/sssssqg1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-matrix-about-line-y-xtan-c/sssssqg1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-matrix-about-line-y-xtan-c/sssssqg1"/>
      <lastmod>2026-11-01T23:12:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hypergeometric-probability-distribution-interactive-demo/sssssqgm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypergeometric-probability-distribution-interactive-demo/sssssqgm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypergeometric-probability-distribution-interactive-demo/sssssqgm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypergeometric-probability-distribution-interactive-demo/sssssqgm"/>
      <lastmod>2026-11-02T18:51:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hypergeometric-probability-distribution-interactive-demo/sssssqgm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypergeometric-probability-distribution-interactive-demo/sssssqgm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypergeometric-probability-distribution-interactive-demo/sssssqgm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypergeometric-probability-distribution-interactive-demo/sssssqgm"/>
      <lastmod>2026-11-02T18:51:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/color-your-world-with-coordinates/sssssqgj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/color-your-world-with-coordinates/sssssqgj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/color-your-world-with-coordinates/sssssqgj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/color-your-world-with-coordinates/sssssqgj"/>
      <lastmod>2026-11-02T16:44:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/color-your-world-with-coordinates/sssssqgj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/color-your-world-with-coordinates/sssssqgj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/color-your-world-with-coordinates/sssssqgj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/color-your-world-with-coordinates/sssssqgj"/>
      <lastmod>2026-11-02T16:44:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-derivative-of-sine-at-x-0/sssssqgp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-derivative-of-sine-at-x-0/sssssqgp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-derivative-of-sine-at-x-0/sssssqgp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-derivative-of-sine-at-x-0/sssssqgp"/>
      <lastmod>2026-11-02T18:41:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-derivative-of-sine-at-x-0/sssssqgp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-derivative-of-sine-at-x-0/sssssqgp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-derivative-of-sine-at-x-0/sssssqgp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-derivative-of-sine-at-x-0/sssssqgp"/>
      <lastmod>2026-11-02T18:41:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/foci-of-an-ellipse/sssssqgw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/foci-of-an-ellipse/sssssqgw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/foci-of-an-ellipse/sssssqgw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/foci-of-an-ellipse/sssssqgw"/>
      <lastmod>2026-11-02T17:47:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/foci-of-an-ellipse/sssssqgw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/foci-of-an-ellipse/sssssqgw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/foci-of-an-ellipse/sssssqgw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/foci-of-an-ellipse/sssssqgw"/>
      <lastmod>2026-11-02T17:47:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trig-identity-via-areas-dynamic-illustrator/sssssqg6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-identity-via-areas-dynamic-illustrator/sssssqg6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-identity-via-areas-dynamic-illustrator/sssssqg6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-identity-via-areas-dynamic-illustrator/sssssqg6"/>
      <lastmod>2026-11-01T19:07:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trig-identity-via-areas-dynamic-illustrator/sssssqg6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-identity-via-areas-dynamic-illustrator/sssssqg6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-identity-via-areas-dynamic-illustrator/sssssqg6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-identity-via-areas-dynamic-illustrator/sssssqg6"/>
      <lastmod>2026-11-01T19:07:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-rational-functions/sssssqgg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-rational-functions/sssssqgg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-rational-functions/sssssqgg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-rational-functions/sssssqgg"/>
      <lastmod>2026-11-01T20:56:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-rational-functions/sssssqgg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-rational-functions/sssssqgg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-rational-functions/sssssqgg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-rational-functions/sssssqgg"/>
      <lastmod>2026-11-01T20:56:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-addition-and-hyperbola-demo/sssssqg9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-addition-and-hyperbola-demo/sssssqg9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-addition-and-hyperbola-demo/sssssqg9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-addition-and-hyperbola-demo/sssssqg9"/>
      <lastmod>2026-11-02T16:53:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-addition-and-hyperbola-demo/sssssqg9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-addition-and-hyperbola-demo/sssssqg9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-addition-and-hyperbola-demo/sssssqg9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-addition-and-hyperbola-demo/sssssqg9"/>
      <lastmod>2026-11-02T16:53:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/speed-vs-braking-distance/sssssqge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/speed-vs-braking-distance/sssssqge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/speed-vs-braking-distance/sssssqge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/speed-vs-braking-distance/sssssqge"/>
      <lastmod>2026-11-02T02:19:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/speed-vs-braking-distance/sssssqge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/speed-vs-braking-distance/sssssqge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/speed-vs-braking-distance/sssssqge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/speed-vs-braking-distance/sssssqge"/>
      <lastmod>2026-11-02T02:19:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-power-functions-exponential-functions-and-x-x/sssssqgv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-power-functions-exponential-functions-and-x-x/sssssqgv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-power-functions-exponential-functions-and-x-x/sssssqgv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-power-functions-exponential-functions-and-x-x/sssssqgv"/>
      <lastmod>2026-11-02T12:59:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-power-functions-exponential-functions-and-x-x/sssssqgv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-power-functions-exponential-functions-and-x-x/sssssqgv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-power-functions-exponential-functions-and-x-x/sssssqgv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-power-functions-exponential-functions-and-x-x/sssssqgv"/>
      <lastmod>2026-11-02T12:59:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruence-through-transformations/sssssqg4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-through-transformations/sssssqg4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-through-transformations/sssssqg4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-through-transformations/sssssqg4"/>
      <lastmod>2026-11-01T21:26:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruence-through-transformations/sssssqg4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-through-transformations/sssssqg4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-through-transformations/sssssqg4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-through-transformations/sssssqg4"/>
      <lastmod>2026-11-01T21:26:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/colorful-spherical-area-voronoi/sssssqgl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/colorful-spherical-area-voronoi/sssssqgl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/colorful-spherical-area-voronoi/sssssqgl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/colorful-spherical-area-voronoi/sssssqgl"/>
      <lastmod>2026-11-01T20:47:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/colorful-spherical-area-voronoi/sssssqgl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/colorful-spherical-area-voronoi/sssssqgl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/colorful-spherical-area-voronoi/sssssqgl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/colorful-spherical-area-voronoi/sssssqgl"/>
      <lastmod>2026-11-01T20:47:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphs-of-exponential-and-logarithmic-functions/sssssqgy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-and-logarithmic-functions/sssssqgy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-exponential-and-logarithmic-functions/sssssqgy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-and-logarithmic-functions/sssssqgy"/>
      <lastmod>2026-11-02T18:05:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphs-of-exponential-and-logarithmic-functions/sssssqgy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-and-logarithmic-functions/sssssqgy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-exponential-and-logarithmic-functions/sssssqgy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-and-logarithmic-functions/sssssqgy"/>
      <lastmod>2026-11-02T18:05:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-without-words-division-of-fractions/sssssqga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-division-of-fractions/sssssqga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-division-of-fractions/sssssqga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-division-of-fractions/sssssqga"/>
      <lastmod>2026-11-01T20:57:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-without-words-division-of-fractions/sssssqga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-division-of-fractions/sssssqga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-division-of-fractions/sssssqga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-division-of-fractions/sssssqga"/>
      <lastmod>2026-11-01T20:57:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angles-in-polygons/sssssqgc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-in-polygons/sssssqgc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-in-polygons/sssssqgc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-in-polygons/sssssqgc"/>
      <lastmod>2026-11-02T11:45:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angles-in-polygons/sssssqgc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-in-polygons/sssssqgc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-in-polygons/sssssqgc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-in-polygons/sssssqgc"/>
      <lastmod>2026-11-02T11:45:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-separable-differential-equations-with-slope-field/sssssqgr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-separable-differential-equations-with-slope-field/sssssqgr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-separable-differential-equations-with-slope-field/sssssqgr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-separable-differential-equations-with-slope-field/sssssqgr"/>
      <lastmod>2026-11-02T18:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-separable-differential-equations-with-slope-field/sssssqgr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-separable-differential-equations-with-slope-field/sssssqgr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-separable-differential-equations-with-slope-field/sssssqgr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-separable-differential-equations-with-slope-field/sssssqgr"/>
      <lastmod>2026-11-02T18:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discovering-quadrilaterals-parallelograms-and-rectangles/sssssqgh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovering-quadrilaterals-parallelograms-and-rectangles/sssssqgh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovering-quadrilaterals-parallelograms-and-rectangles/sssssqgh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovering-quadrilaterals-parallelograms-and-rectangles/sssssqgh"/>
      <lastmod>2026-11-02T12:32:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discovering-quadrilaterals-parallelograms-and-rectangles/sssssqgh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovering-quadrilaterals-parallelograms-and-rectangles/sssssqgh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovering-quadrilaterals-parallelograms-and-rectangles/sssssqgh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovering-quadrilaterals-parallelograms-and-rectangles/sssssqgh"/>
      <lastmod>2026-11-02T12:32:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-defined-by-4-circles-defined-by-a-tetrahedron/sssssqgt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-defined-by-4-circles-defined-by-a-tetrahedron/sssssqgt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-defined-by-4-circles-defined-by-a-tetrahedron/sssssqgt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-defined-by-4-circles-defined-by-a-tetrahedron/sssssqgt"/>
      <lastmod>2026-11-02T03:14:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-defined-by-4-circles-defined-by-a-tetrahedron/sssssqgt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-defined-by-4-circles-defined-by-a-tetrahedron/sssssqgt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-defined-by-4-circles-defined-by-a-tetrahedron/sssssqgt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-defined-by-4-circles-defined-by-a-tetrahedron/sssssqgt"/>
      <lastmod>2026-11-02T03:14:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-solids-of-revolution/sssssqgx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-solids-of-revolution/sssssqgx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-solids-of-revolution/sssssqgx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-solids-of-revolution/sssssqgx"/>
      <lastmod>2026-11-01T19:15:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-solids-of-revolution/sssssqgx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-solids-of-revolution/sssssqgx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-solids-of-revolution/sssssqgx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-solids-of-revolution/sssssqgx"/>
      <lastmod>2026-11-01T19:15:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-parameters-combined-modes/sssssqgi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-parameters-combined-modes/sssssqgi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-parameters-combined-modes/sssssqgi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-parameters-combined-modes/sssssqgi"/>
      <lastmod>2026-11-02T18:11:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-parameters-combined-modes/sssssqgi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-parameters-combined-modes/sssssqgi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-parameters-combined-modes/sssssqgi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-parameters-combined-modes/sssssqgi"/>
      <lastmod>2026-11-02T18:11:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/whitney-umbrella-views/sssssqgo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/whitney-umbrella-views/sssssqgo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/whitney-umbrella-views/sssssqgo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/whitney-umbrella-views/sssssqgo"/>
      <lastmod>2026-11-01T19:15:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/whitney-umbrella-views/sssssqgo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/whitney-umbrella-views/sssssqgo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/whitney-umbrella-views/sssssqgo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/whitney-umbrella-views/sssssqgo"/>
      <lastmod>2026-11-01T19:15:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-example/sssssq9s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-example/sssssq9s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-example/sssssq9s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-example/sssssq9s"/>
      <lastmod>2026-11-02T07:29:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-example/sssssq9s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-example/sssssq9s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-example/sssssq9s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-example/sssssq9s"/>
      <lastmod>2026-11-02T07:29:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pi-visualization/sssssq97</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pi-visualization/sssssq97"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pi-visualization/sssssq97"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pi-visualization/sssssq97"/>
      <lastmod>2026-11-01T21:06:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pi-visualization/sssssq97</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pi-visualization/sssssq97"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pi-visualization/sssssq97"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pi-visualization/sssssq97"/>
      <lastmod>2026-11-01T21:06:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-operations-game/sssssq9n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-operations-game/sssssq9n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-operations-game/sssssq9n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-operations-game/sssssq9n"/>
      <lastmod>2026-11-02T17:51:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-operations-game/sssssq9n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-operations-game/sssssq9n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-operations-game/sssssq9n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-operations-game/sssssq9n"/>
      <lastmod>2026-11-02T17:51:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-steven-white/sssssq92</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-steven-white/sssssq92"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-steven-white/sssssq92"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-steven-white/sssssq92"/>
      <lastmod>2026-11-01T23:38:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-steven-white/sssssq92</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-steven-white/sssssq92"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-steven-white/sssssq92"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-steven-white/sssssq92"/>
      <lastmod>2026-11-01T23:38:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/d-rer-s-perspective-of-a-prism/sssssq9k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/d-rer-s-perspective-of-a-prism/sssssq9k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/d-rer-s-perspective-of-a-prism/sssssq9k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/d-rer-s-perspective-of-a-prism/sssssq9k"/>
      <lastmod>2026-11-01T20:48:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/d-rer-s-perspective-of-a-prism/sssssq9k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/d-rer-s-perspective-of-a-prism/sssssq9k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/d-rer-s-perspective-of-a-prism/sssssq9k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/d-rer-s-perspective-of-a-prism/sssssq9k"/>
      <lastmod>2026-11-01T20:48:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-triangle-phenomena-illustration/sssssq9z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-triangle-phenomena-illustration/sssssq9z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-triangle-phenomena-illustration/sssssq9z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-triangle-phenomena-illustration/sssssq9z"/>
      <lastmod>2026-11-02T18:54:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-triangle-phenomena-illustration/sssssq9z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-triangle-phenomena-illustration/sssssq9z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-triangle-phenomena-illustration/sssssq9z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-triangle-phenomena-illustration/sssssq9z"/>
      <lastmod>2026-11-02T18:54:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculus-connecting-rate-of-change-with-quantity/sssssq90</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculus-connecting-rate-of-change-with-quantity/sssssq90"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculus-connecting-rate-of-change-with-quantity/sssssq90"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculus-connecting-rate-of-change-with-quantity/sssssq90"/>
      <lastmod>2026-11-02T18:09:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculus-connecting-rate-of-change-with-quantity/sssssq90</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculus-connecting-rate-of-change-with-quantity/sssssq90"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculus-connecting-rate-of-change-with-quantity/sssssq90"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculus-connecting-rate-of-change-with-quantity/sssssq90"/>
      <lastmod>2026-11-02T18:09:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-by-cross-section-visualization/sssssq9d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-by-cross-section-visualization/sssssq9d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-by-cross-section-visualization/sssssq9d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-by-cross-section-visualization/sssssq9d"/>
      <lastmod>2026-11-02T18:09:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-by-cross-section-visualization/sssssq9d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-by-cross-section-visualization/sssssq9d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-by-cross-section-visualization/sssssq9d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-by-cross-section-visualization/sssssq9d"/>
      <lastmod>2026-11-02T18:09:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-area-demonstration-by-mister-mac/sssssq9f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-demonstration-by-mister-mac/sssssq9f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-demonstration-by-mister-mac/sssssq9f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-demonstration-by-mister-mac/sssssq9f"/>
      <lastmod>2026-11-02T02:52:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-area-demonstration-by-mister-mac/sssssq9f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-demonstration-by-mister-mac/sssssq9f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-demonstration-by-mister-mac/sssssq9f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-demonstration-by-mister-mac/sssssq9f"/>
      <lastmod>2026-11-02T02:52:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-lee-w-fisher/sssssq98</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-lee-w-fisher/sssssq98"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-lee-w-fisher/sssssq98"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-lee-w-fisher/sssssq98"/>
      <lastmod>2026-11-02T00:32:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-lee-w-fisher/sssssq98</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-lee-w-fisher/sssssq98"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-lee-w-fisher/sssssq98"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-lee-w-fisher/sssssq98"/>
      <lastmod>2026-11-02T00:32:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogrammatic-pyramid/sssssq9u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogrammatic-pyramid/sssssq9u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogrammatic-pyramid/sssssq9u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogrammatic-pyramid/sssssq9u"/>
      <lastmod>2026-11-01T19:07:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogrammatic-pyramid/sssssq9u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogrammatic-pyramid/sssssq9u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogrammatic-pyramid/sssssq9u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogrammatic-pyramid/sssssq9u"/>
      <lastmod>2026-11-01T19:07:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-on-coordinate-grid/sssssq95</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-on-coordinate-grid/sssssq95"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-on-coordinate-grid/sssssq95"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-on-coordinate-grid/sssssq95"/>
      <lastmod>2026-11-01T19:10:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-on-coordinate-grid/sssssq95</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-on-coordinate-grid/sssssq95"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-on-coordinate-grid/sssssq95"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-on-coordinate-grid/sssssq95"/>
      <lastmod>2026-11-01T19:10:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/uniform-acceleration-motion-demo/sssssq9b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/uniform-acceleration-motion-demo/sssssq9b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/uniform-acceleration-motion-demo/sssssq9b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/uniform-acceleration-motion-demo/sssssq9b"/>
      <lastmod>2026-11-01T21:15:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/uniform-acceleration-motion-demo/sssssq9b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/uniform-acceleration-motion-demo/sssssq9b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/uniform-acceleration-motion-demo/sssssq9b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/uniform-acceleration-motion-demo/sssssq9b"/>
      <lastmod>2026-11-01T21:15:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-sum-calculator/sssssq93</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sum-calculator/sssssq93"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sum-calculator/sssssq93"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sum-calculator/sssssq93"/>
      <lastmod>2026-11-02T18:18:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-sum-calculator/sssssq93</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sum-calculator/sssssq93"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sum-calculator/sssssq93"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sum-calculator/sssssq93"/>
      <lastmod>2026-11-02T18:18:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/my-heart-will-go-on/sssssq9q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/my-heart-will-go-on/sssssq9q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/my-heart-will-go-on/sssssq9q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/my-heart-will-go-on/sssssq9q"/>
      <lastmod>2026-11-02T13:01:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/my-heart-will-go-on/sssssq9q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/my-heart-will-go-on/sssssq9q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/my-heart-will-go-on/sssssq9q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/my-heart-will-go-on/sssssq9q"/>
      <lastmod>2026-11-02T13:01:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partitioning-a-line-segment-level-2-proportional-division-and-midpoint-construc/sssssq91</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partitioning-a-line-segment-level-2-proportional-division-and-midpoint-construc/sssssq91"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partitioning-a-line-segment-level-2-proportional-division-and-midpoint-construc/sssssq91"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partitioning-a-line-segment-level-2-proportional-division-and-midpoint-construc/sssssq91"/>
      <lastmod>2026-11-02T00:46:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partitioning-a-line-segment-level-2-proportional-division-and-midpoint-construc/sssssq91</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partitioning-a-line-segment-level-2-proportional-division-and-midpoint-construc/sssssq91"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partitioning-a-line-segment-level-2-proportional-division-and-midpoint-construc/sssssq91"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partitioning-a-line-segment-level-2-proportional-division-and-midpoint-construc/sssssq91"/>
      <lastmod>2026-11-02T00:46:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tips-and-tricks-for-cas-input-in-geogebra/sssssq9m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tips-and-tricks-for-cas-input-in-geogebra/sssssq9m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tips-and-tricks-for-cas-input-in-geogebra/sssssq9m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tips-and-tricks-for-cas-input-in-geogebra/sssssq9m"/>
      <lastmod>2026-11-02T02:24:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tips-and-tricks-for-cas-input-in-geogebra/sssssq9m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tips-and-tricks-for-cas-input-in-geogebra/sssssq9m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tips-and-tricks-for-cas-input-in-geogebra/sssssq9m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tips-and-tricks-for-cas-input-in-geogebra/sssssq9m"/>
      <lastmod>2026-11-02T02:24:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/piecewise-function-example-2/sssssq9j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piecewise-function-example-2/sssssq9j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piecewise-function-example-2/sssssq9j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piecewise-function-example-2/sssssq9j"/>
      <lastmod>2026-11-02T13:54:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/piecewise-function-example-2/sssssq9j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piecewise-function-example-2/sssssq9j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piecewise-function-example-2/sssssq9j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piecewise-function-example-2/sssssq9j"/>
      <lastmod>2026-11-02T13:54:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-limits-of-piecewise-defined-function/sssssq9p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-limits-of-piecewise-defined-function/sssssq9p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-limits-of-piecewise-defined-function/sssssq9p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-limits-of-piecewise-defined-function/sssssq9p"/>
      <lastmod>2026-11-02T00:31:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-limits-of-piecewise-defined-function/sssssq9p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-limits-of-piecewise-defined-function/sssssq9p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-limits-of-piecewise-defined-function/sssssq9p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-limits-of-piecewise-defined-function/sssssq9p"/>
      <lastmod>2026-11-02T00:31:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-ibrahim-el-hage/sssssq9w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-ibrahim-el-hage/sssssq9w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-ibrahim-el-hage/sssssq9w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-ibrahim-el-hage/sssssq9w"/>
      <lastmod>2026-11-02T12:27:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-ibrahim-el-hage/sssssq9w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-ibrahim-el-hage/sssssq9w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-ibrahim-el-hage/sssssq9w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-ibrahim-el-hage/sssssq9w"/>
      <lastmod>2026-11-02T12:27:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gradient-of-tangent/sssssq96</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-of-tangent/sssssq96"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-of-tangent/sssssq96"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-of-tangent/sssssq96"/>
      <lastmod>2026-11-02T17:50:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gradient-of-tangent/sssssq96</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-of-tangent/sssssq96"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-of-tangent/sssssq96"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-of-tangent/sssssq96"/>
      <lastmod>2026-11-02T17:50:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-and-congruence-2/sssssq9g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-and-congruence-2/sssssq9g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-and-congruence-2/sssssq9g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-and-congruence-2/sssssq9g"/>
      <lastmod>2026-11-02T13:15:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-and-congruence-2/sssssq9g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-and-congruence-2/sssssq9g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-and-congruence-2/sssssq9g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-and-congruence-2/sssssq9g"/>
      <lastmod>2026-11-02T13:15:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-parallelograms/sssssq99</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-parallelograms/sssssq99"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-parallelograms/sssssq99"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-parallelograms/sssssq99"/>
      <lastmod>2026-11-02T18:03:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-parallelograms/sssssq99</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-parallelograms/sssssq99"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-parallelograms/sssssq99"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-parallelograms/sssssq99"/>
      <lastmod>2026-11-02T18:03:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shortest-distance-from-a-point-to-a-parabola/sssssq9e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shortest-distance-from-a-point-to-a-parabola/sssssq9e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shortest-distance-from-a-point-to-a-parabola/sssssq9e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shortest-distance-from-a-point-to-a-parabola/sssssq9e"/>
      <lastmod>2026-11-02T00:27:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shortest-distance-from-a-point-to-a-parabola/sssssq9e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shortest-distance-from-a-point-to-a-parabola/sssssq9e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shortest-distance-from-a-point-to-a-parabola/sssssq9e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shortest-distance-from-a-point-to-a-parabola/sssssq9e"/>
      <lastmod>2026-11-02T00:27:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertex-form-and-parabolas/sssssq9v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form-and-parabolas/sssssq9v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form-and-parabolas/sssssq9v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form-and-parabolas/sssssq9v"/>
      <lastmod>2026-11-02T03:15:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertex-form-and-parabolas/sssssq9v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form-and-parabolas/sssssq9v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form-and-parabolas/sssssq9v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form-and-parabolas/sssssq9v"/>
      <lastmod>2026-11-02T03:15:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-and-cosine-rules-and-triangle-area-proofs/sssssq94</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-rules-and-triangle-area-proofs/sssssq94"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-rules-and-triangle-area-proofs/sssssq94"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-rules-and-triangle-area-proofs/sssssq94"/>
      <lastmod>2026-11-01T21:33:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-and-cosine-rules-and-triangle-area-proofs/sssssq94</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-rules-and-triangle-area-proofs/sssssq94"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-rules-and-triangle-area-proofs/sssssq94"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-rules-and-triangle-area-proofs/sssssq94"/>
      <lastmod>2026-11-01T21:33:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-points-in-3d-dynamic-illustrator/sssssq9l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-in-3d-dynamic-illustrator/sssssq9l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-in-3d-dynamic-illustrator/sssssq9l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-in-3d-dynamic-illustrator/sssssq9l"/>
      <lastmod>2026-11-02T17:55:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-points-in-3d-dynamic-illustrator/sssssq9l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-in-3d-dynamic-illustrator/sssssq9l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-in-3d-dynamic-illustrator/sssssq9l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-in-3d-dynamic-illustrator/sssssq9l"/>
      <lastmod>2026-11-02T17:55:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-comparison-of-cylinder-and-cone/sssssq9y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-comparison-of-cylinder-and-cone/sssssq9y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-comparison-of-cylinder-and-cone/sssssq9y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-comparison-of-cylinder-and-cone/sssssq9y"/>
      <lastmod>2026-11-02T03:05:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-comparison-of-cylinder-and-cone/sssssq9y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-comparison-of-cylinder-and-cone/sssssq9y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-comparison-of-cylinder-and-cone/sssssq9y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-comparison-of-cylinder-and-cone/sssssq9y"/>
      <lastmod>2026-11-02T03:05:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-structure-pattern/sssssq9a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-structure-pattern/sssssq9a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-structure-pattern/sssssq9a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-structure-pattern/sssssq9a"/>
      <lastmod>2026-11-02T17:57:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-structure-pattern/sssssq9a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-structure-pattern/sssssq9a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-structure-pattern/sssssq9a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-structure-pattern/sssssq9a"/>
      <lastmod>2026-11-02T17:57:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-rule-sine-cosine-of-special-angles/sssssq9c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-rule-sine-cosine-of-special-angles/sssssq9c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-rule-sine-cosine-of-special-angles/sssssq9c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-rule-sine-cosine-of-special-angles/sssssq9c"/>
      <lastmod>2026-11-02T15:16:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-rule-sine-cosine-of-special-angles/sssssq9c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-rule-sine-cosine-of-special-angles/sssssq9c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-rule-sine-cosine-of-special-angles/sssssq9c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-rule-sine-cosine-of-special-angles/sssssq9c"/>
      <lastmod>2026-11-02T15:16:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-and-cosine-tracer/sssssq9r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-tracer/sssssq9r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-tracer/sssssq9r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-tracer/sssssq9r"/>
      <lastmod>2026-11-02T13:37:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-and-cosine-tracer/sssssq9r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-tracer/sssssq9r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-tracer/sssssq9r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-tracer/sssssq9r"/>
      <lastmod>2026-11-02T13:37:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/aas-exploration-angle-angle-side-triangle-congruence/sssssq9h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aas-exploration-angle-angle-side-triangle-congruence/sssssq9h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aas-exploration-angle-angle-side-triangle-congruence/sssssq9h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aas-exploration-angle-angle-side-triangle-congruence/sssssq9h"/>
      <lastmod>2026-11-01T21:27:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/aas-exploration-angle-angle-side-triangle-congruence/sssssq9h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aas-exploration-angle-angle-side-triangle-congruence/sssssq9h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aas-exploration-angle-angle-side-triangle-congruence/sssssq9h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aas-exploration-angle-angle-side-triangle-congruence/sssssq9h"/>
      <lastmod>2026-11-01T21:27:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-similar-triangles/sssssq9t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-similar-triangles/sssssq9t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-similar-triangles/sssssq9t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-similar-triangles/sssssq9t"/>
      <lastmod>2026-11-02T17:44:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-similar-triangles/sssssq9t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-similar-triangles/sssssq9t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-similar-triangles/sssssq9t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-similar-triangles/sssssq9t"/>
      <lastmod>2026-11-02T17:44:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mapping-diagram-of-powers-homotopy/sssssq9x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagram-of-powers-homotopy/sssssq9x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagram-of-powers-homotopy/sssssq9x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagram-of-powers-homotopy/sssssq9x"/>
      <lastmod>2026-11-02T12:38:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mapping-diagram-of-powers-homotopy/sssssq9x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagram-of-powers-homotopy/sssssq9x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagram-of-powers-homotopy/sssssq9x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagram-of-powers-homotopy/sssssq9x"/>
      <lastmod>2026-11-02T12:38:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-transformation/sssssq9i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-transformation/sssssq9i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-transformation/sssssq9i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-transformation/sssssq9i"/>
      <lastmod>2026-11-02T10:46:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-transformation/sssssq9i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-transformation/sssssq9i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-transformation/sssssq9i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-transformation/sssssq9i"/>
      <lastmod>2026-11-02T10:46:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/continuity-exploration-at-x-a/sssssq9o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuity-exploration-at-x-a/sssssq9o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuity-exploration-at-x-a/sssssq9o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuity-exploration-at-x-a/sssssq9o"/>
      <lastmod>2026-11-02T16:50:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/continuity-exploration-at-x-a/sssssq9o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuity-exploration-at-x-a/sssssq9o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuity-exploration-at-x-a/sssssq9o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuity-exploration-at-x-a/sssssq9o"/>
      <lastmod>2026-11-02T16:50:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fermat-point-by-peter-sassman/sssssqes</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fermat-point-by-peter-sassman/sssssqes"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fermat-point-by-peter-sassman/sssssqes"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fermat-point-by-peter-sassman/sssssqes"/>
      <lastmod>2026-11-01T21:18:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fermat-point-by-peter-sassman/sssssqes</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fermat-point-by-peter-sassman/sssssqes"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fermat-point-by-peter-sassman/sssssqes"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fermat-point-by-peter-sassman/sssssqes"/>
      <lastmod>2026-11-01T21:18:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebra-2-exponential-functions-modeling-mini-quiz-26/sssssqe7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-exponential-functions-modeling-mini-quiz-26/sssssqe7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-exponential-functions-modeling-mini-quiz-26/sssssqe7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-exponential-functions-modeling-mini-quiz-26/sssssqe7"/>
      <lastmod>2026-11-01T22:08:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebra-2-exponential-functions-modeling-mini-quiz-26/sssssqe7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-exponential-functions-modeling-mini-quiz-26/sssssqe7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-exponential-functions-modeling-mini-quiz-26/sssssqe7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-exponential-functions-modeling-mini-quiz-26/sssssqe7"/>
      <lastmod>2026-11-01T22:08:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-and-perimeter-of-rectangle-with-fixed-perimeter-by-ooi-soo-huat/sssssqen</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-rectangle-with-fixed-perimeter-by-ooi-soo-huat/sssssqen"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-rectangle-with-fixed-perimeter-by-ooi-soo-huat/sssssqen"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-rectangle-with-fixed-perimeter-by-ooi-soo-huat/sssssqen"/>
      <lastmod>2026-11-02T17:51:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-and-perimeter-of-rectangle-with-fixed-perimeter-by-ooi-soo-huat/sssssqen</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-rectangle-with-fixed-perimeter-by-ooi-soo-huat/sssssqen"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-rectangle-with-fixed-perimeter-by-ooi-soo-huat/sssssqen"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-rectangle-with-fixed-perimeter-by-ooi-soo-huat/sssssqen"/>
      <lastmod>2026-11-02T17:51:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/max-bill-painting-by-br-ndusa-ioan/sssssqe2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-painting-by-br-ndusa-ioan/sssssqe2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-painting-by-br-ndusa-ioan/sssssqe2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-painting-by-br-ndusa-ioan/sssssqe2"/>
      <lastmod>2026-11-02T17:56:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/max-bill-painting-by-br-ndusa-ioan/sssssqe2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-painting-by-br-ndusa-ioan/sssssqe2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-painting-by-br-ndusa-ioan/sssssqe2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-painting-by-br-ndusa-ioan/sssssqe2"/>
      <lastmod>2026-11-02T17:56:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-and-vector-demonstration/sssssqek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-and-vector-demonstration/sssssqek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-and-vector-demonstration/sssssqek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-and-vector-demonstration/sssssqek"/>
      <lastmod>2026-11-01T20:46:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-and-vector-demonstration/sssssqek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-and-vector-demonstration/sssssqek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-and-vector-demonstration/sssssqek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-and-vector-demonstration/sssssqek"/>
      <lastmod>2026-11-01T20:46:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygonal-construction-geometric-transformations-and-circle-drawing/sssssqez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygonal-construction-geometric-transformations-and-circle-drawing/sssssqez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygonal-construction-geometric-transformations-and-circle-drawing/sssssqez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygonal-construction-geometric-transformations-and-circle-drawing/sssssqez"/>
      <lastmod>2026-11-02T02:16:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygonal-construction-geometric-transformations-and-circle-drawing/sssssqez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygonal-construction-geometric-transformations-and-circle-drawing/sssssqez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygonal-construction-geometric-transformations-and-circle-drawing/sssssqez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygonal-construction-geometric-transformations-and-circle-drawing/sssssqez"/>
      <lastmod>2026-11-02T02:16:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperboloidal-gears/sssssqe0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloidal-gears/sssssqe0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloidal-gears/sssssqe0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloidal-gears/sssssqe0"/>
      <lastmod>2026-11-01T23:50:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperboloidal-gears/sssssqe0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloidal-gears/sssssqe0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloidal-gears/sssssqe0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloidal-gears/sssssqe0"/>
      <lastmod>2026-11-01T23:50:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/programming-polygons/sssssqed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/programming-polygons/sssssqed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/programming-polygons/sssssqed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/programming-polygons/sssssqed"/>
      <lastmod>2026-11-02T16:51:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/programming-polygons/sssssqed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/programming-polygons/sssssqed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/programming-polygons/sssssqed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/programming-polygons/sssssqed"/>
      <lastmod>2026-11-02T16:51:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-rotations-on-the-coordinate-plane/sssssqef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-rotations-on-the-coordinate-plane/sssssqef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-rotations-on-the-coordinate-plane/sssssqef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-rotations-on-the-coordinate-plane/sssssqef"/>
      <lastmod>2026-11-02T14:53:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-rotations-on-the-coordinate-plane/sssssqef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-rotations-on-the-coordinate-plane/sssssqef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-rotations-on-the-coordinate-plane/sssssqef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-rotations-on-the-coordinate-plane/sssssqef"/>
      <lastmod>2026-11-02T14:53:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-rhombus-demo-by-yingxiang-xu/sssssqe8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-rhombus-demo-by-yingxiang-xu/sssssqe8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-rhombus-demo-by-yingxiang-xu/sssssqe8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-rhombus-demo-by-yingxiang-xu/sssssqe8"/>
      <lastmod>2026-11-01T23:10:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-rhombus-demo-by-yingxiang-xu/sssssqe8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-rhombus-demo-by-yingxiang-xu/sssssqe8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-rhombus-demo-by-yingxiang-xu/sssssqe8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-rhombus-demo-by-yingxiang-xu/sssssqe8"/>
      <lastmod>2026-11-01T23:10:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-functions-x-y-intercepts/sssssqeu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-x-y-intercepts/sssssqeu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-x-y-intercepts/sssssqeu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-x-y-intercepts/sssssqeu"/>
      <lastmod>2026-11-02T16:54:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-functions-x-y-intercepts/sssssqeu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-x-y-intercepts/sssssqeu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-x-y-intercepts/sssssqeu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-x-y-intercepts/sssssqeu"/>
      <lastmod>2026-11-02T16:54:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arc-length-in-polar-coordinates/sssssqe5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-in-polar-coordinates/sssssqe5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-in-polar-coordinates/sssssqe5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-in-polar-coordinates/sssssqe5"/>
      <lastmod>2026-11-02T16:56:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arc-length-in-polar-coordinates/sssssqe5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-in-polar-coordinates/sssssqe5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-in-polar-coordinates/sssssqe5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-in-polar-coordinates/sssssqe5"/>
      <lastmod>2026-11-02T16:56:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagrams-and-2d-vectors-visualization/sssssqeb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagrams-and-2d-vectors-visualization/sssssqeb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagrams-and-2d-vectors-visualization/sssssqeb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagrams-and-2d-vectors-visualization/sssssqeb"/>
      <lastmod>2026-11-01T19:23:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagrams-and-2d-vectors-visualization/sssssqeb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagrams-and-2d-vectors-visualization/sssssqeb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagrams-and-2d-vectors-visualization/sssssqeb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagrams-and-2d-vectors-visualization/sssssqeb"/>
      <lastmod>2026-11-01T19:23:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angry-birds-and-quadratic-equations-by-salma-bouazzaoui/sssssqe3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angry-birds-and-quadratic-equations-by-salma-bouazzaoui/sssssqe3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angry-birds-and-quadratic-equations-by-salma-bouazzaoui/sssssqe3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angry-birds-and-quadratic-equations-by-salma-bouazzaoui/sssssqe3"/>
      <lastmod>2026-11-01T23:28:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angry-birds-and-quadratic-equations-by-salma-bouazzaoui/sssssqe3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angry-birds-and-quadratic-equations-by-salma-bouazzaoui/sssssqe3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angry-birds-and-quadratic-equations-by-salma-bouazzaoui/sssssqe3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angry-birds-and-quadratic-equations-by-salma-bouazzaoui/sssssqe3"/>
      <lastmod>2026-11-01T23:28:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reactions-of-three-supported-beam-to-oblique-force/sssssqeq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reactions-of-three-supported-beam-to-oblique-force/sssssqeq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reactions-of-three-supported-beam-to-oblique-force/sssssqeq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reactions-of-three-supported-beam-to-oblique-force/sssssqeq"/>
      <lastmod>2026-11-01T21:50:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reactions-of-three-supported-beam-to-oblique-force/sssssqeq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reactions-of-three-supported-beam-to-oblique-force/sssssqeq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reactions-of-three-supported-beam-to-oblique-force/sssssqeq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reactions-of-three-supported-beam-to-oblique-force/sssssqeq"/>
      <lastmod>2026-11-01T21:50:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinate-geometry-mcq-example/sssssqe1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-geometry-mcq-example/sssssqe1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-geometry-mcq-example/sssssqe1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-geometry-mcq-example/sssssqe1"/>
      <lastmod>2026-11-02T17:41:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinate-geometry-mcq-example/sssssqe1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-geometry-mcq-example/sssssqe1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-geometry-mcq-example/sssssqe1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-geometry-mcq-example/sssssqe1"/>
      <lastmod>2026-11-02T17:41:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-explanation-of-invariance-of-sum-of-squares-of-distances-using-steiner-theore/sssssqem</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-explanation-of-invariance-of-sum-of-squares-of-distances-using-steiner-theore/sssssqem"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-explanation-of-invariance-of-sum-of-squares-of-distances-using-steiner-theore/sssssqem"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-explanation-of-invariance-of-sum-of-squares-of-distances-using-steiner-theore/sssssqem"/>
      <lastmod>2026-11-01T22:06:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-explanation-of-invariance-of-sum-of-squares-of-distances-using-steiner-theore/sssssqem</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-explanation-of-invariance-of-sum-of-squares-of-distances-using-steiner-theore/sssssqem"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-explanation-of-invariance-of-sum-of-squares-of-distances-using-steiner-theore/sssssqem"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-explanation-of-invariance-of-sum-of-squares-of-distances-using-steiner-theore/sssssqem"/>
      <lastmod>2026-11-01T22:06:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scalars-and-vectors/sssssqej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalars-and-vectors/sssssqej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalars-and-vectors/sssssqej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalars-and-vectors/sssssqej"/>
      <lastmod>2026-11-02T16:43:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scalars-and-vectors/sssssqej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalars-and-vectors/sssssqej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalars-and-vectors/sssssqej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalars-and-vectors/sssssqej"/>
      <lastmod>2026-11-02T16:43:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-positive-and-negative-integers-on-a-number-line-copy/sssssqep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-positive-and-negative-integers-on-a-number-line-copy/sssssqep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-positive-and-negative-integers-on-a-number-line-copy/sssssqep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-positive-and-negative-integers-on-a-number-line-copy/sssssqep"/>
      <lastmod>2026-11-01T20:42:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-positive-and-negative-integers-on-a-number-line-copy/sssssqep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-positive-and-negative-integers-on-a-number-line-copy/sssssqep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-positive-and-negative-integers-on-a-number-line-copy/sssssqep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-positive-and-negative-integers-on-a-number-line-copy/sssssqep"/>
      <lastmod>2026-11-01T20:42:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-congruence-via-construction/sssssqew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-via-construction/sssssqew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-via-construction/sssssqew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-via-construction/sssssqew"/>
      <lastmod>2026-11-01T22:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-congruence-via-construction/sssssqew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-via-construction/sssssqew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-via-construction/sssssqew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-via-construction/sssssqew"/>
      <lastmod>2026-11-01T22:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/butterfly-curve-by-daniel-mentrard/sssssqe6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/butterfly-curve-by-daniel-mentrard/sssssqe6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/butterfly-curve-by-daniel-mentrard/sssssqe6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/butterfly-curve-by-daniel-mentrard/sssssqe6"/>
      <lastmod>2026-11-01T20:47:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/butterfly-curve-by-daniel-mentrard/sssssqe6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/butterfly-curve-by-daniel-mentrard/sssssqe6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/butterfly-curve-by-daniel-mentrard/sssssqe6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/butterfly-curve-by-daniel-mentrard/sssssqe6"/>
      <lastmod>2026-11-01T20:47:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-equation-solving-demo/sssssqeg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-equation-solving-demo/sssssqeg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-equation-solving-demo/sssssqeg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-equation-solving-demo/sssssqeg"/>
      <lastmod>2026-11-02T18:49:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-equation-solving-demo/sssssqeg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-equation-solving-demo/sssssqeg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-equation-solving-demo/sssssqeg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-equation-solving-demo/sssssqeg"/>
      <lastmod>2026-11-02T18:49:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-triangular-pyramids-by-s-sharma/sssssqe9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-triangular-pyramids-by-s-sharma/sssssqe9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-triangular-pyramids-by-s-sharma/sssssqe9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-triangular-pyramids-by-s-sharma/sssssqe9"/>
      <lastmod>2026-11-01T22:05:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-triangular-pyramids-by-s-sharma/sssssqe9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-triangular-pyramids-by-s-sharma/sssssqe9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-triangular-pyramids-by-s-sharma/sssssqe9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-triangular-pyramids-by-s-sharma/sssssqe9"/>
      <lastmod>2026-11-01T22:05:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-equations-in-standard-form/sssssqee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equations-in-standard-form/sssssqee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equations-in-standard-form/sssssqee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equations-in-standard-form/sssssqee"/>
      <lastmod>2026-11-02T00:23:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-equations-in-standard-form/sssssqee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equations-in-standard-form/sssssqee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equations-in-standard-form/sssssqee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equations-in-standard-form/sssssqee"/>
      <lastmod>2026-11-02T00:23:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rational-multiplication-of-a-length-practice-i/sssssqev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-multiplication-of-a-length-practice-i/sssssqev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-multiplication-of-a-length-practice-i/sssssqev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-multiplication-of-a-length-practice-i/sssssqev"/>
      <lastmod>2026-11-02T13:58:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rational-multiplication-of-a-length-practice-i/sssssqev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-multiplication-of-a-length-practice-i/sssssqev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-multiplication-of-a-length-practice-i/sssssqev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-multiplication-of-a-length-practice-i/sssssqev"/>
      <lastmod>2026-11-02T13:58:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-and-area-of-regular-polygons/sssssqe4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-and-area-of-regular-polygons/sssssqe4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-and-area-of-regular-polygons/sssssqe4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-and-area-of-regular-polygons/sssssqe4"/>
      <lastmod>2026-11-01T23:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-and-area-of-regular-polygons/sssssqe4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-and-area-of-regular-polygons/sssssqe4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-and-area-of-regular-polygons/sssssqe4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-and-area-of-regular-polygons/sssssqe4"/>
      <lastmod>2026-11-01T23:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-rectangular-pyramids/sssssqel</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-pyramids/sssssqel"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-rectangular-pyramids/sssssqel"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-pyramids/sssssqel"/>
      <lastmod>2026-11-01T22:01:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-rectangular-pyramids/sssssqel</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-pyramids/sssssqel"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-rectangular-pyramids/sssssqel"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-pyramids/sssssqel"/>
      <lastmod>2026-11-01T22:01:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumscribe-a-triangle/sssssqey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumscribe-a-triangle/sssssqey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumscribe-a-triangle/sssssqey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumscribe-a-triangle/sssssqey"/>
      <lastmod>2026-11-02T18:45:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumscribe-a-triangle/sssssqey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumscribe-a-triangle/sssssqey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumscribe-a-triangle/sssssqey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumscribe-a-triangle/sssssqey"/>
      <lastmod>2026-11-02T18:45:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/easily-color-list-items/sssssqea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/easily-color-list-items/sssssqea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/easily-color-list-items/sssssqea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/easily-color-list-items/sssssqea"/>
      <lastmod>2026-11-01T19:31:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/easily-color-list-items/sssssqea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/easily-color-list-items/sssssqea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/easily-color-list-items/sssssqea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/easily-color-list-items/sssssqea"/>
      <lastmod>2026-11-01T19:31:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-by-neleigh-johnson/sssssqec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-by-neleigh-johnson/sssssqec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-by-neleigh-johnson/sssssqec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-by-neleigh-johnson/sssssqec"/>
      <lastmod>2026-11-02T17:48:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-by-neleigh-johnson/sssssqec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-by-neleigh-johnson/sssssqec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-by-neleigh-johnson/sssssqec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-by-neleigh-johnson/sssssqec"/>
      <lastmod>2026-11-02T17:48:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/envelope-of-circles-generated-by-ellipse/sssssqer</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/envelope-of-circles-generated-by-ellipse/sssssqer"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/envelope-of-circles-generated-by-ellipse/sssssqer"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/envelope-of-circles-generated-by-ellipse/sssssqer"/>
      <lastmod>2026-11-02T16:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/envelope-of-circles-generated-by-ellipse/sssssqer</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/envelope-of-circles-generated-by-ellipse/sssssqer"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/envelope-of-circles-generated-by-ellipse/sssssqer"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/envelope-of-circles-generated-by-ellipse/sssssqer"/>
      <lastmod>2026-11-02T16:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-lines-in-the-coordinate-plane-quick-exploration/sssssqeh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines-in-the-coordinate-plane-quick-exploration/sssssqeh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines-in-the-coordinate-plane-quick-exploration/sssssqeh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines-in-the-coordinate-plane-quick-exploration/sssssqeh"/>
      <lastmod>2026-11-02T17:45:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-lines-in-the-coordinate-plane-quick-exploration/sssssqeh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines-in-the-coordinate-plane-quick-exploration/sssssqeh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines-in-the-coordinate-plane-quick-exploration/sssssqeh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines-in-the-coordinate-plane-quick-exploration/sssssqeh"/>
      <lastmod>2026-11-02T17:45:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-congruence-4/sssssqet</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-4/sssssqet"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-4/sssssqet"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-4/sssssqet"/>
      <lastmod>2026-11-02T13:41:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-congruence-4/sssssqet</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-4/sssssqet"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-4/sssssqet"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-4/sssssqet"/>
      <lastmod>2026-11-02T13:41:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-area-by-decomposing-and-rearranging/sssssqex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-area-by-decomposing-and-rearranging/sssssqex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-area-by-decomposing-and-rearranging/sssssqex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-area-by-decomposing-and-rearranging/sssssqex"/>
      <lastmod>2026-11-01T23:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-area-by-decomposing-and-rearranging/sssssqex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-area-by-decomposing-and-rearranging/sssssqex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-area-by-decomposing-and-rearranging/sssssqex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-area-by-decomposing-and-rearranging/sssssqex"/>
      <lastmod>2026-11-01T23:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygons-and-triangles/sssssqei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygons-and-triangles/sssssqei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygons-and-triangles/sssssqei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygons-and-triangles/sssssqei"/>
      <lastmod>2026-11-02T17:50:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygons-and-triangles/sssssqei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygons-and-triangles/sssssqei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygons-and-triangles/sssssqei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygons-and-triangles/sssssqei"/>
      <lastmod>2026-11-02T17:50:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-two-circles-by-david-wees/sssssqeo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-two-circles-by-david-wees/sssssqeo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-two-circles-by-david-wees/sssssqeo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-two-circles-by-david-wees/sssssqeo"/>
      <lastmod>2026-11-01T23:53:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-two-circles-by-david-wees/sssssqeo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-two-circles-by-david-wees/sssssqeo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-two-circles-by-david-wees/sssssqeo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-two-circles-by-david-wees/sssssqeo"/>
      <lastmod>2026-11-01T23:53:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-lines-construction/sssssqvs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-construction/sssssqvs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-construction/sssssqvs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-construction/sssssqvs"/>
      <lastmod>2026-11-01T20:47:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-lines-construction/sssssqvs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-construction/sssssqvs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-construction/sssssqvs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-construction/sssssqvs"/>
      <lastmod>2026-11-01T20:47:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trig-ratios-of-similar-triangles/sssssqv7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-ratios-of-similar-triangles/sssssqv7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-ratios-of-similar-triangles/sssssqv7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-ratios-of-similar-triangles/sssssqv7"/>
      <lastmod>2026-11-02T18:31:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trig-ratios-of-similar-triangles/sssssqv7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-ratios-of-similar-triangles/sssssqv7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-ratios-of-similar-triangles/sssssqv7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-ratios-of-similar-triangles/sssssqv7"/>
      <lastmod>2026-11-02T18:31:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modulus-function-demo/sssssqvn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modulus-function-demo/sssssqvn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modulus-function-demo/sssssqvn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modulus-function-demo/sssssqvn"/>
      <lastmod>2026-11-01T19:34:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modulus-function-demo/sssssqvn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modulus-function-demo/sssssqvn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modulus-function-demo/sssssqvn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modulus-function-demo/sssssqvn"/>
      <lastmod>2026-11-01T19:34:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-trapezoid/sssssqv2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-trapezoid/sssssqv2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-trapezoid/sssssqv2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-trapezoid/sssssqv2"/>
      <lastmod>2026-11-02T00:25:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-trapezoid/sssssqv2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-trapezoid/sssssqv2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-trapezoid/sssssqv2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-trapezoid/sssssqv2"/>
      <lastmod>2026-11-02T00:25:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/critical-points-as-geometric-medians-and-hessian-matrix-analysis/sssssqvk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/critical-points-as-geometric-medians-and-hessian-matrix-analysis/sssssqvk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/critical-points-as-geometric-medians-and-hessian-matrix-analysis/sssssqvk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/critical-points-as-geometric-medians-and-hessian-matrix-analysis/sssssqvk"/>
      <lastmod>2026-11-01T21:59:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/critical-points-as-geometric-medians-and-hessian-matrix-analysis/sssssqvk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/critical-points-as-geometric-medians-and-hessian-matrix-analysis/sssssqvk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/critical-points-as-geometric-medians-and-hessian-matrix-analysis/sssssqvk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/critical-points-as-geometric-medians-and-hessian-matrix-analysis/sssssqvk"/>
      <lastmod>2026-11-01T21:59:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scalar-multiplication/sssssqvz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalar-multiplication/sssssqvz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalar-multiplication/sssssqvz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalar-multiplication/sssssqvz"/>
      <lastmod>2026-11-01T23:33:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scalar-multiplication/sssssqvz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalar-multiplication/sssssqvz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalar-multiplication/sssssqvz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalar-multiplication/sssssqvz"/>
      <lastmod>2026-11-01T23:33:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-to-play-the-game/sssssqv0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-to-play-the-game/sssssqv0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-to-play-the-game/sssssqv0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-to-play-the-game/sssssqv0"/>
      <lastmod>2026-11-02T09:33:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-to-play-the-game/sssssqv0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-to-play-the-game/sssssqv0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-to-play-the-game/sssssqv0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-to-play-the-game/sssssqv0"/>
      <lastmod>2026-11-02T09:33:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-calculations-of-rectangular-prisms/sssssqvd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-calculations-of-rectangular-prisms/sssssqvd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-calculations-of-rectangular-prisms/sssssqvd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-calculations-of-rectangular-prisms/sssssqvd"/>
      <lastmod>2026-11-01T22:04:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-calculations-of-rectangular-prisms/sssssqvd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-calculations-of-rectangular-prisms/sssssqvd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-calculations-of-rectangular-prisms/sssssqvd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-calculations-of-rectangular-prisms/sssssqvd"/>
      <lastmod>2026-11-01T22:04:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/math-3c-surfaces-quiz-example/sssssqvf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-3c-surfaces-quiz-example/sssssqvf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-3c-surfaces-quiz-example/sssssqvf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-3c-surfaces-quiz-example/sssssqvf"/>
      <lastmod>2026-11-01T21:24:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/math-3c-surfaces-quiz-example/sssssqvf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-3c-surfaces-quiz-example/sssssqvf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-3c-surfaces-quiz-example/sssssqvf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-3c-surfaces-quiz-example/sssssqvf"/>
      <lastmod>2026-11-01T21:24:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integration-by-parts/sssssqv8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-by-parts/sssssqv8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-by-parts/sssssqv8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-by-parts/sssssqv8"/>
      <lastmod>2026-11-01T21:35:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integration-by-parts/sssssqv8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-by-parts/sssssqv8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-by-parts/sssssqv8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-by-parts/sssssqv8"/>
      <lastmod>2026-11-01T21:35:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/different-nets-of-a-cuboid/sssssqvu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-nets-of-a-cuboid/sssssqvu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-nets-of-a-cuboid/sssssqvu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-nets-of-a-cuboid/sssssqvu"/>
      <lastmod>2026-11-02T17:53:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/different-nets-of-a-cuboid/sssssqvu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-nets-of-a-cuboid/sssssqvu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-nets-of-a-cuboid/sssssqvu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-nets-of-a-cuboid/sssssqvu"/>
      <lastmod>2026-11-02T17:53:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inscribed-angles/sssssqv5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-angles/sssssqv5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-angles/sssssqv5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-angles/sssssqv5"/>
      <lastmod>2026-11-02T02:54:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inscribed-angles/sssssqv5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-angles/sssssqv5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-angles/sssssqv5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-angles/sssssqv5"/>
      <lastmod>2026-11-02T02:54:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/moir-pattern-of-parallel-perpendicular-lines/sssssqvb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moir-pattern-of-parallel-perpendicular-lines/sssssqvb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moir-pattern-of-parallel-perpendicular-lines/sssssqvb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moir-pattern-of-parallel-perpendicular-lines/sssssqvb"/>
      <lastmod>2026-11-02T16:44:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/moir-pattern-of-parallel-perpendicular-lines/sssssqvb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moir-pattern-of-parallel-perpendicular-lines/sssssqvb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moir-pattern-of-parallel-perpendicular-lines/sssssqvb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moir-pattern-of-parallel-perpendicular-lines/sssssqvb"/>
      <lastmod>2026-11-02T16:44:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relationship-among-fractions-decimals-and-percentages/sssssqv3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-among-fractions-decimals-and-percentages/sssssqv3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-among-fractions-decimals-and-percentages/sssssqv3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-among-fractions-decimals-and-percentages/sssssqv3"/>
      <lastmod>2026-11-02T11:44:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relationship-among-fractions-decimals-and-percentages/sssssqv3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-among-fractions-decimals-and-percentages/sssssqv3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-among-fractions-decimals-and-percentages/sssssqv3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-among-fractions-decimals-and-percentages/sssssqv3"/>
      <lastmod>2026-11-02T11:44:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-of-reflectional-symmetry-axes/sssssqvq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-reflectional-symmetry-axes/sssssqvq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-reflectional-symmetry-axes/sssssqvq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-reflectional-symmetry-axes/sssssqvq"/>
      <lastmod>2026-11-01T19:19:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-of-reflectional-symmetry-axes/sssssqvq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-reflectional-symmetry-axes/sssssqvq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-reflectional-symmetry-axes/sssssqvq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-reflectional-symmetry-axes/sssssqvq"/>
      <lastmod>2026-11-01T19:19:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shortest-path-exercise-2/sssssqv1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shortest-path-exercise-2/sssssqv1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shortest-path-exercise-2/sssssqv1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shortest-path-exercise-2/sssssqv1"/>
      <lastmod>2026-11-02T17:50:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shortest-path-exercise-2/sssssqv1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shortest-path-exercise-2/sssssqv1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shortest-path-exercise-2/sssssqv1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shortest-path-exercise-2/sssssqv1"/>
      <lastmod>2026-11-02T17:50:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy-2/sssssqvm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy-2/sssssqvm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-with-same-numerator-by-rohit-roy-2/sssssqvm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy-2/sssssqvm"/>
      <lastmod>2026-11-01T23:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-fractions-with-same-numerator-by-rohit-roy-2/sssssqvm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy-2/sssssqvm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-with-same-numerator-by-rohit-roy-2/sssssqvm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy-2/sssssqvm"/>
      <lastmod>2026-11-01T23:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeters-of-inside-shapes-demo/sssssqvj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeters-of-inside-shapes-demo/sssssqvj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeters-of-inside-shapes-demo/sssssqvj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeters-of-inside-shapes-demo/sssssqvj"/>
      <lastmod>2026-11-02T02:29:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeters-of-inside-shapes-demo/sssssqvj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeters-of-inside-shapes-demo/sssssqvj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeters-of-inside-shapes-demo/sssssqvj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeters-of-inside-shapes-demo/sssssqvj"/>
      <lastmod>2026-11-02T02:29:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-as-sum-of-rectangles/sssssqvp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-as-sum-of-rectangles/sssssqvp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-as-sum-of-rectangles/sssssqvp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-as-sum-of-rectangles/sssssqvp"/>
      <lastmod>2026-11-02T13:18:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-as-sum-of-rectangles/sssssqvp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-as-sum-of-rectangles/sssssqvp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-as-sum-of-rectangles/sssssqvp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-as-sum-of-rectangles/sssssqvp"/>
      <lastmod>2026-11-02T13:18:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trisecting-a-cube-into-three-pyramids/sssssqvw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trisecting-a-cube-into-three-pyramids/sssssqvw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trisecting-a-cube-into-three-pyramids/sssssqvw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trisecting-a-cube-into-three-pyramids/sssssqvw"/>
      <lastmod>2026-11-02T03:05:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trisecting-a-cube-into-three-pyramids/sssssqvw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trisecting-a-cube-into-three-pyramids/sssssqvw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trisecting-a-cube-into-three-pyramids/sssssqvw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trisecting-a-cube-into-three-pyramids/sssssqvw"/>
      <lastmod>2026-11-02T03:05:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-equation-and-zeros/sssssqv6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equation-and-zeros/sssssqv6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equation-and-zeros/sssssqv6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equation-and-zeros/sssssqv6"/>
      <lastmod>2026-11-02T18:15:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-equation-and-zeros/sssssqv6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equation-and-zeros/sssssqv6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equation-and-zeros/sssssqv6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equation-and-zeros/sssssqv6"/>
      <lastmod>2026-11-02T18:15:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-juan-carlos-ponce-campuzano/sssssqvg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-juan-carlos-ponce-campuzano/sssssqvg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-sphere-by-juan-carlos-ponce-campuzano/sssssqvg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-juan-carlos-ponce-campuzano/sssssqvg"/>
      <lastmod>2026-11-01T23:57:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-sphere-by-juan-carlos-ponce-campuzano/sssssqvg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-juan-carlos-ponce-campuzano/sssssqvg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-sphere-by-juan-carlos-ponce-campuzano/sssssqvg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-juan-carlos-ponce-campuzano/sssssqvg"/>
      <lastmod>2026-11-01T23:57:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagonal-prism-by-norm-prokup/sssssqv9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-prism-by-norm-prokup/sssssqv9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-prism-by-norm-prokup/sssssqv9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-prism-by-norm-prokup/sssssqv9"/>
      <lastmod>2026-11-02T12:33:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagonal-prism-by-norm-prokup/sssssqv9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-prism-by-norm-prokup/sssssqv9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-prism-by-norm-prokup/sssssqv9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-prism-by-norm-prokup/sssssqv9"/>
      <lastmod>2026-11-02T12:33:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-line-through-a-point-on-a-line/sssssqve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-line-through-a-point-on-a-line/sssssqve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-line-through-a-point-on-a-line/sssssqve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-line-through-a-point-on-a-line/sssssqve"/>
      <lastmod>2026-11-01T21:23:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-line-through-a-point-on-a-line/sssssqve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-line-through-a-point-on-a-line/sssssqve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-line-through-a-point-on-a-line/sssssqve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-line-through-a-point-on-a-line/sssssqve"/>
      <lastmod>2026-11-01T21:23:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/acceleration-due-to-moon-s-gravity/sssssqvv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/acceleration-due-to-moon-s-gravity/sssssqvv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/acceleration-due-to-moon-s-gravity/sssssqvv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/acceleration-due-to-moon-s-gravity/sssssqvv"/>
      <lastmod>2026-11-01T21:02:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/acceleration-due-to-moon-s-gravity/sssssqvv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/acceleration-due-to-moon-s-gravity/sssssqvv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/acceleration-due-to-moon-s-gravity/sssssqvv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/acceleration-due-to-moon-s-gravity/sssssqvv"/>
      <lastmod>2026-11-01T21:02:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparison-of-means-and-sds-visualizing-data-variability/sssssqv4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparison-of-means-and-sds-visualizing-data-variability/sssssqv4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparison-of-means-and-sds-visualizing-data-variability/sssssqv4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparison-of-means-and-sds-visualizing-data-variability/sssssqv4"/>
      <lastmod>2026-11-02T02:36:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparison-of-means-and-sds-visualizing-data-variability/sssssqv4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparison-of-means-and-sds-visualizing-data-variability/sssssqv4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparison-of-means-and-sds-visualizing-data-variability/sssssqv4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparison-of-means-and-sds-visualizing-data-variability/sssssqv4"/>
      <lastmod>2026-11-02T02:36:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-fractions-by-daniel-mentrard/sssssqvl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-daniel-mentrard/sssssqvl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-by-daniel-mentrard/sssssqvl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-daniel-mentrard/sssssqvl"/>
      <lastmod>2026-11-01T19:15:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-fractions-by-daniel-mentrard/sssssqvl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-daniel-mentrard/sssssqvl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-by-daniel-mentrard/sssssqvl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-daniel-mentrard/sssssqvl"/>
      <lastmod>2026-11-01T19:15:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-right-triangles-and-trig-ratios/sssssqvy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-and-trig-ratios/sssssqvy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-and-trig-ratios/sssssqvy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-and-trig-ratios/sssssqvy"/>
      <lastmod>2026-11-01T23:19:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-right-triangles-and-trig-ratios/sssssqvy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-and-trig-ratios/sssssqvy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-and-trig-ratios/sssssqvy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-and-trig-ratios/sssssqvy"/>
      <lastmod>2026-11-01T23:19:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-transformations-of-curves/sssssqva</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-transformations-of-curves/sssssqva"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-transformations-of-curves/sssssqva"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-transformations-of-curves/sssssqva"/>
      <lastmod>2026-11-02T02:44:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-transformations-of-curves/sssssqva</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-transformations-of-curves/sssssqva"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-transformations-of-curves/sssssqva"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-transformations-of-curves/sssssqva"/>
      <lastmod>2026-11-02T02:44:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/midpoint-of-line-segment-demo/sssssqvc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoint-of-line-segment-demo/sssssqvc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoint-of-line-segment-demo/sssssqvc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoint-of-line-segment-demo/sssssqvc"/>
      <lastmod>2026-11-02T00:47:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/midpoint-of-line-segment-demo/sssssqvc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoint-of-line-segment-demo/sssssqvc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoint-of-line-segment-demo/sssssqvc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoint-of-line-segment-demo/sssssqvc"/>
      <lastmod>2026-11-02T00:47:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/google-ads-logo/sssssqvr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/google-ads-logo/sssssqvr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/google-ads-logo/sssssqvr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/google-ads-logo/sssssqvr"/>
      <lastmod>2026-11-02T09:28:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/google-ads-logo/sssssqvr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/google-ads-logo/sssssqvr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/google-ads-logo/sssssqvr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/google-ads-logo/sssssqvr"/>
      <lastmod>2026-11-02T09:28:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-puzzles-example/sssssqvh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-puzzles-example/sssssqvh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-puzzles-example/sssssqvh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-puzzles-example/sssssqvh"/>
      <lastmod>2026-11-02T10:37:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-puzzles-example/sssssqvh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-puzzles-example/sssssqvh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-puzzles-example/sssssqvh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-puzzles-example/sssssqvh"/>
      <lastmod>2026-11-02T10:37:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nalini-logo/sssssqvt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nalini-logo/sssssqvt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nalini-logo/sssssqvt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nalini-logo/sssssqvt"/>
      <lastmod>2026-11-01T21:21:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nalini-logo/sssssqvt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nalini-logo/sssssqvt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nalini-logo/sssssqvt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nalini-logo/sssssqvt"/>
      <lastmod>2026-11-01T21:21:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-prism-visualization/sssssqvx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-prism-visualization/sssssqvx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-prism-visualization/sssssqvx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-prism-visualization/sssssqvx"/>
      <lastmod>2026-11-02T18:47:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-prism-visualization/sssssqvx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-prism-visualization/sssssqvx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-prism-visualization/sssssqvx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-prism-visualization/sssssqvx"/>
      <lastmod>2026-11-02T18:47:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-wave/sssssqvi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave/sssssqvi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave/sssssqvi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave/sssssqvi"/>
      <lastmod>2026-11-02T00:18:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-wave/sssssqvi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave/sssssqvi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave/sssssqvi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave/sssssqvi"/>
      <lastmod>2026-11-02T00:18:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotations-dynamic-exploration-of-lines-triangles-and-optimization/sssssqvo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-dynamic-exploration-of-lines-triangles-and-optimization/sssssqvo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-dynamic-exploration-of-lines-triangles-and-optimization/sssssqvo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-dynamic-exploration-of-lines-triangles-and-optimization/sssssqvo"/>
      <lastmod>2026-11-02T03:00:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotations-dynamic-exploration-of-lines-triangles-and-optimization/sssssqvo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-dynamic-exploration-of-lines-triangles-and-optimization/sssssqvo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-dynamic-exploration-of-lines-triangles-and-optimization/sssssqvo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-dynamic-exploration-of-lines-triangles-and-optimization/sssssqvo"/>
      <lastmod>2026-11-02T03:00:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-two-planes-in-a-square-pyramid/sssssq4s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-in-a-square-pyramid/sssssq4s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-in-a-square-pyramid/sssssq4s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-in-a-square-pyramid/sssssq4s"/>
      <lastmod>2026-11-02T16:38:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-two-planes-in-a-square-pyramid/sssssq4s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-in-a-square-pyramid/sssssq4s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-in-a-square-pyramid/sssssq4s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-in-a-square-pyramid/sssssq4s"/>
      <lastmod>2026-11-02T16:38:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-function-coefficients-and-graph-transformations/sssssq47</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-coefficients-and-graph-transformations/sssssq47"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-coefficients-and-graph-transformations/sssssq47"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-coefficients-and-graph-transformations/sssssq47"/>
      <lastmod>2026-11-02T12:12:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-function-coefficients-and-graph-transformations/sssssq47</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-coefficients-and-graph-transformations/sssssq47"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-coefficients-and-graph-transformations/sssssq47"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-coefficients-and-graph-transformations/sssssq47"/>
      <lastmod>2026-11-02T12:12:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-visualization-interactive-graphical-demo/sssssq4n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-visualization-interactive-graphical-demo/sssssq4n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-visualization-interactive-graphical-demo/sssssq4n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-visualization-interactive-graphical-demo/sssssq4n"/>
      <lastmod>2026-11-02T03:18:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-visualization-interactive-graphical-demo/sssssq4n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-visualization-interactive-graphical-demo/sssssq4n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-visualization-interactive-graphical-demo/sssssq4n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-visualization-interactive-graphical-demo/sssssq4n"/>
      <lastmod>2026-11-02T03:18:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/apply-matrix-example/sssssq42</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/apply-matrix-example/sssssq42"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/apply-matrix-example/sssssq42"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/apply-matrix-example/sssssq42"/>
      <lastmod>2026-11-02T02:19:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/apply-matrix-example/sssssq42</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/apply-matrix-example/sssssq42"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/apply-matrix-example/sssssq42"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/apply-matrix-example/sssssq42"/>
      <lastmod>2026-11-02T02:19:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/homothety-and-reflection-by-point/sssssq4k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/homothety-and-reflection-by-point/sssssq4k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/homothety-and-reflection-by-point/sssssq4k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/homothety-and-reflection-by-point/sssssq4k"/>
      <lastmod>2026-11-02T09:47:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/homothety-and-reflection-by-point/sssssq4k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/homothety-and-reflection-by-point/sssssq4k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/homothety-and-reflection-by-point/sssssq4k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/homothety-and-reflection-by-point/sssssq4k"/>
      <lastmod>2026-11-02T09:47:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fitting-a-normal-distribution-to-a-histogram-theft-losses-example/sssssq4z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fitting-a-normal-distribution-to-a-histogram-theft-losses-example/sssssq4z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fitting-a-normal-distribution-to-a-histogram-theft-losses-example/sssssq4z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fitting-a-normal-distribution-to-a-histogram-theft-losses-example/sssssq4z"/>
      <lastmod>2026-11-02T00:45:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fitting-a-normal-distribution-to-a-histogram-theft-losses-example/sssssq4z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fitting-a-normal-distribution-to-a-histogram-theft-losses-example/sssssq4z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fitting-a-normal-distribution-to-a-histogram-theft-losses-example/sssssq4z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fitting-a-normal-distribution-to-a-histogram-theft-losses-example/sssssq4z"/>
      <lastmod>2026-11-02T00:45:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-addition-postulate-investigation-by-dan-dale/sssssq40</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-investigation-by-dan-dale/sssssq40"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-addition-postulate-investigation-by-dan-dale/sssssq40"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-investigation-by-dan-dale/sssssq40"/>
      <lastmod>2026-11-01T21:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-addition-postulate-investigation-by-dan-dale/sssssq40</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-investigation-by-dan-dale/sssssq40"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-addition-postulate-investigation-by-dan-dale/sssssq40"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-investigation-by-dan-dale/sssssq40"/>
      <lastmod>2026-11-01T21:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transversals-and-corresponding-angles/sssssq4d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transversals-and-corresponding-angles/sssssq4d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transversals-and-corresponding-angles/sssssq4d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transversals-and-corresponding-angles/sssssq4d"/>
      <lastmod>2026-11-01T21:10:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transversals-and-corresponding-angles/sssssq4d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transversals-and-corresponding-angles/sssssq4d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transversals-and-corresponding-angles/sssssq4d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transversals-and-corresponding-angles/sssssq4d"/>
      <lastmod>2026-11-01T21:10:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-sine-and-cosine-of-an-angle/sssssq4f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-sine-and-cosine-of-an-angle/sssssq4f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-sine-and-cosine-of-an-angle/sssssq4f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-sine-and-cosine-of-an-angle/sssssq4f"/>
      <lastmod>2026-11-01T23:15:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-sine-and-cosine-of-an-angle/sssssq4f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-sine-and-cosine-of-an-angle/sssssq4f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-sine-and-cosine-of-an-angle/sssssq4f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-sine-and-cosine-of-an-angle/sssssq4f"/>
      <lastmod>2026-11-01T23:15:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-demo/sssssq48</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-demo/sssssq48"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-demo/sssssq48"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-demo/sssssq48"/>
      <lastmod>2026-11-02T12:08:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-demo/sssssq48</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-demo/sssssq48"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-demo/sssssq48"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-demo/sssssq48"/>
      <lastmod>2026-11-02T12:08:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/step-by-step-volume-by-shells-method/sssssq4u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/step-by-step-volume-by-shells-method/sssssq4u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/step-by-step-volume-by-shells-method/sssssq4u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/step-by-step-volume-by-shells-method/sssssq4u"/>
      <lastmod>2026-11-01T19:29:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/step-by-step-volume-by-shells-method/sssssq4u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/step-by-step-volume-by-shells-method/sssssq4u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/step-by-step-volume-by-shells-method/sssssq4u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/step-by-step-volume-by-shells-method/sssssq4u"/>
      <lastmod>2026-11-01T19:29:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-perimeter-exploration/sssssq45</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-perimeter-exploration/sssssq45"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-perimeter-exploration/sssssq45"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-perimeter-exploration/sssssq45"/>
      <lastmod>2026-11-01T19:02:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-perimeter-exploration/sssssq45</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-perimeter-exploration/sssssq45"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-perimeter-exploration/sssssq45"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-perimeter-exploration/sssssq45"/>
      <lastmod>2026-11-01T19:02:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sketching-the-derivative-by-blake/sssssq4b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketching-the-derivative-by-blake/sssssq4b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketching-the-derivative-by-blake/sssssq4b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketching-the-derivative-by-blake/sssssq4b"/>
      <lastmod>2026-11-02T17:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sketching-the-derivative-by-blake/sssssq4b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketching-the-derivative-by-blake/sssssq4b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketching-the-derivative-by-blake/sssssq4b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketching-the-derivative-by-blake/sssssq4b"/>
      <lastmod>2026-11-02T17:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squash-a-parallelogram-dynamic-exploration-of-shape-and-area/sssssq43</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squash-a-parallelogram-dynamic-exploration-of-shape-and-area/sssssq43"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squash-a-parallelogram-dynamic-exploration-of-shape-and-area/sssssq43"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squash-a-parallelogram-dynamic-exploration-of-shape-and-area/sssssq43"/>
      <lastmod>2026-11-02T03:03:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/squash-a-parallelogram-dynamic-exploration-of-shape-and-area/sssssq43</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squash-a-parallelogram-dynamic-exploration-of-shape-and-area/sssssq43"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squash-a-parallelogram-dynamic-exploration-of-shape-and-area/sssssq43"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squash-a-parallelogram-dynamic-exploration-of-shape-and-area/sssssq43"/>
      <lastmod>2026-11-02T03:03:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-inequality/sssssq4q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequality/sssssq4q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequality/sssssq4q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequality/sssssq4q"/>
      <lastmod>2026-11-02T17:58:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-inequality/sssssq4q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequality/sssssq4q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequality/sssssq4q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequality/sssssq4q"/>
      <lastmod>2026-11-02T17:58:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-tracer/sssssq41</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-tracer/sssssq41"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-tracer/sssssq41"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-tracer/sssssq41"/>
      <lastmod>2026-11-02T15:04:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-tracer/sssssq41</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-tracer/sssssq41"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-tracer/sssssq41"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-tracer/sssssq41"/>
      <lastmod>2026-11-02T15:04:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-wave-simulation/sssssq4m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-wave-simulation/sssssq4m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-wave-simulation/sssssq4m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-wave-simulation/sssssq4m"/>
      <lastmod>2026-11-01T19:18:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-wave-simulation/sssssq4m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-wave-simulation/sssssq4m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-wave-simulation/sssssq4m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-wave-simulation/sssssq4m"/>
      <lastmod>2026-11-01T19:18:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distributions-related-to-the-normal-distribution/sssssq4j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distributions-related-to-the-normal-distribution/sssssq4j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distributions-related-to-the-normal-distribution/sssssq4j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distributions-related-to-the-normal-distribution/sssssq4j"/>
      <lastmod>2026-11-01T21:12:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distributions-related-to-the-normal-distribution/sssssq4j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distributions-related-to-the-normal-distribution/sssssq4j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distributions-related-to-the-normal-distribution/sssssq4j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distributions-related-to-the-normal-distribution/sssssq4j"/>
      <lastmod>2026-11-01T21:12:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/space-invasion-multiplying-integers/sssssq4p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-invasion-multiplying-integers/sssssq4p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-invasion-multiplying-integers/sssssq4p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-invasion-multiplying-integers/sssssq4p"/>
      <lastmod>2026-11-01T21:35:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/space-invasion-multiplying-integers/sssssq4p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-invasion-multiplying-integers/sssssq4p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-invasion-multiplying-integers/sssssq4p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-invasion-multiplying-integers/sssssq4p"/>
      <lastmod>2026-11-01T21:35:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-meaning-of-polynomial-roots/sssssq4w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-polynomial-roots/sssssq4w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-meaning-of-polynomial-roots/sssssq4w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-polynomial-roots/sssssq4w"/>
      <lastmod>2026-11-01T19:25:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-meaning-of-polynomial-roots/sssssq4w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-polynomial-roots/sssssq4w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-meaning-of-polynomial-roots/sssssq4w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-polynomial-roots/sssssq4w"/>
      <lastmod>2026-11-01T19:25:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-vectors-and-geometric-interpretation/sssssq46</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-vectors-and-geometric-interpretation/sssssq46"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-vectors-and-geometric-interpretation/sssssq46"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-vectors-and-geometric-interpretation/sssssq46"/>
      <lastmod>2026-11-02T00:34:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-vectors-and-geometric-interpretation/sssssq46</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-vectors-and-geometric-interpretation/sssssq46"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-vectors-and-geometric-interpretation/sssssq46"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-vectors-and-geometric-interpretation/sssssq46"/>
      <lastmod>2026-11-02T00:34:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions-practice-quiz/sssssq4g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-practice-quiz/sssssq4g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-practice-quiz/sssssq4g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-practice-quiz/sssssq4g"/>
      <lastmod>2026-11-01T23:22:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions-practice-quiz/sssssq4g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-practice-quiz/sssssq4g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-practice-quiz/sssssq4g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-practice-quiz/sssssq4g"/>
      <lastmod>2026-11-01T23:22:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/divide-a-cube-into-two-equal-parts/sssssq49</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/divide-a-cube-into-two-equal-parts/sssssq49"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/divide-a-cube-into-two-equal-parts/sssssq49"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/divide-a-cube-into-two-equal-parts/sssssq49"/>
      <lastmod>2026-11-01T23:40:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/divide-a-cube-into-two-equal-parts/sssssq49</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/divide-a-cube-into-two-equal-parts/sssssq49"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/divide-a-cube-into-two-equal-parts/sssssq49"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/divide-a-cube-into-two-equal-parts/sssssq49"/>
      <lastmod>2026-11-01T23:40:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-volume-from-circular-sector/sssssq4e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-from-circular-sector/sssssq4e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-from-circular-sector/sssssq4e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-from-circular-sector/sssssq4e"/>
      <lastmod>2026-11-01T23:12:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-volume-from-circular-sector/sssssq4e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-from-circular-sector/sssssq4e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-from-circular-sector/sssssq4e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-from-circular-sector/sssssq4e"/>
      <lastmod>2026-11-01T23:12:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone-with-constant-slant-height/sssssq4v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-with-constant-slant-height/sssssq4v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-with-constant-slant-height/sssssq4v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-with-constant-slant-height/sssssq4v"/>
      <lastmod>2026-11-01T21:45:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cone-with-constant-slant-height/sssssq4v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-with-constant-slant-height/sssssq4v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-with-constant-slant-height/sssssq4v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-with-constant-slant-height/sssssq4v"/>
      <lastmod>2026-11-01T21:45:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-and-function-graphs/sssssq44</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-function-graphs/sssssq44"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-function-graphs/sssssq44"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-function-graphs/sssssq44"/>
      <lastmod>2026-11-01T20:49:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-and-function-graphs/sssssq44</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-function-graphs/sssssq44"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-function-graphs/sssssq44"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-function-graphs/sssssq44"/>
      <lastmod>2026-11-01T20:49:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/m-m-probability-simulation/sssssq4l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/m-m-probability-simulation/sssssq4l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/m-m-probability-simulation/sssssq4l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/m-m-probability-simulation/sssssq4l"/>
      <lastmod>2026-11-02T02:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/m-m-probability-simulation/sssssq4l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/m-m-probability-simulation/sssssq4l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/m-m-probability-simulation/sssssq4l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/m-m-probability-simulation/sssssq4l"/>
      <lastmod>2026-11-02T02:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/g-gco-10-determining-the-properties-of-a-parallelogram/sssssq4y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/g-gco-10-determining-the-properties-of-a-parallelogram/sssssq4y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/g-gco-10-determining-the-properties-of-a-parallelogram/sssssq4y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/g-gco-10-determining-the-properties-of-a-parallelogram/sssssq4y"/>
      <lastmod>2026-11-01T21:47:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/g-gco-10-determining-the-properties-of-a-parallelogram/sssssq4y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/g-gco-10-determining-the-properties-of-a-parallelogram/sssssq4y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/g-gco-10-determining-the-properties-of-a-parallelogram/sssssq4y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/g-gco-10-determining-the-properties-of-a-parallelogram/sssssq4y"/>
      <lastmod>2026-11-01T21:47:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-complex-numbers/sssssq4a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers/sssssq4a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-complex-numbers/sssssq4a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers/sssssq4a"/>
      <lastmod>2026-11-01T23:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-complex-numbers/sssssq4a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers/sssssq4a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-complex-numbers/sssssq4a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers/sssssq4a"/>
      <lastmod>2026-11-01T23:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rock-paper-scissors-extended-fire-water-air-sponge-random-battle-simulation/sssssq4c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rock-paper-scissors-extended-fire-water-air-sponge-random-battle-simulation/sssssq4c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rock-paper-scissors-extended-fire-water-air-sponge-random-battle-simulation/sssssq4c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rock-paper-scissors-extended-fire-water-air-sponge-random-battle-simulation/sssssq4c"/>
      <lastmod>2026-11-02T09:12:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rock-paper-scissors-extended-fire-water-air-sponge-random-battle-simulation/sssssq4c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rock-paper-scissors-extended-fire-water-air-sponge-random-battle-simulation/sssssq4c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rock-paper-scissors-extended-fire-water-air-sponge-random-battle-simulation/sssssq4c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rock-paper-scissors-extended-fire-water-air-sponge-random-battle-simulation/sssssq4c"/>
      <lastmod>2026-11-02T09:12:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-3d-animation-rotation-and-section-exploration/sssssq4r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-3d-animation-rotation-and-section-exploration/sssssq4r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-3d-animation-rotation-and-section-exploration/sssssq4r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-3d-animation-rotation-and-section-exploration/sssssq4r"/>
      <lastmod>2026-11-01T21:15:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-3d-animation-rotation-and-section-exploration/sssssq4r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-3d-animation-rotation-and-section-exploration/sssssq4r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-3d-animation-rotation-and-section-exploration/sssssq4r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-3d-animation-rotation-and-section-exploration/sssssq4r"/>
      <lastmod>2026-11-01T21:15:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-curves-and-cuboid-rotation-demo/sssssq4h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-and-cuboid-rotation-demo/sssssq4h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-and-cuboid-rotation-demo/sssssq4h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-and-cuboid-rotation-demo/sssssq4h"/>
      <lastmod>2026-11-02T18:51:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-curves-and-cuboid-rotation-demo/sssssq4h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-and-cuboid-rotation-demo/sssssq4h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-and-cuboid-rotation-demo/sssssq4h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-and-cuboid-rotation-demo/sssssq4h"/>
      <lastmod>2026-11-02T18:51:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-surface-of-z-1-3/sssssq4t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-surface-of-z-1-3/sssssq4t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-surface-of-z-1-3/sssssq4t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-surface-of-z-1-3/sssssq4t"/>
      <lastmod>2026-11-02T18:37:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-surface-of-z-1-3/sssssq4t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-surface-of-z-1-3/sssssq4t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-surface-of-z-1-3/sssssq4t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-surface-of-z-1-3/sssssq4t"/>
      <lastmod>2026-11-02T18:37:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/earth-and-sun-celestial-coordinate-system/sssssq4x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/earth-and-sun-celestial-coordinate-system/sssssq4x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/earth-and-sun-celestial-coordinate-system/sssssq4x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/earth-and-sun-celestial-coordinate-system/sssssq4x"/>
      <lastmod>2026-11-02T09:13:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/earth-and-sun-celestial-coordinate-system/sssssq4x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/earth-and-sun-celestial-coordinate-system/sssssq4x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/earth-and-sun-celestial-coordinate-system/sssssq4x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/earth-and-sun-celestial-coordinate-system/sssssq4x"/>
      <lastmod>2026-11-02T09:13:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-exponents-by-angela-dwane/sssssq4i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-exponents-by-angela-dwane/sssssq4i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-exponents-by-angela-dwane/sssssq4i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-exponents-by-angela-dwane/sssssq4i"/>
      <lastmod>2026-11-01T22:12:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-exponents-by-angela-dwane/sssssq4i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-exponents-by-angela-dwane/sssssq4i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-exponents-by-angela-dwane/sssssq4i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-exponents-by-angela-dwane/sssssq4i"/>
      <lastmod>2026-11-01T22:12:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-and-oblique-cones/sssssq4o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-and-oblique-cones/sssssq4o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-and-oblique-cones/sssssq4o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-and-oblique-cones/sssssq4o"/>
      <lastmod>2026-11-02T18:18:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-and-oblique-cones/sssssq4o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-and-oblique-cones/sssssq4o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-and-oblique-cones/sssssq4o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-and-oblique-cones/sssssq4o"/>
      <lastmod>2026-11-02T18:18:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-sphere-volume-formula-by-dan-dale/sssssqls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-sphere-volume-formula-by-dan-dale/sssssqls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-sphere-volume-formula-by-dan-dale/sssssqls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-sphere-volume-formula-by-dan-dale/sssssqls"/>
      <lastmod>2026-11-01T21:35:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-sphere-volume-formula-by-dan-dale/sssssqls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-sphere-volume-formula-by-dan-dale/sssssqls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-sphere-volume-formula-by-dan-dale/sssssqls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-sphere-volume-formula-by-dan-dale/sssssqls"/>
      <lastmod>2026-11-01T21:35:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler/sssssql7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler/sssssql7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler/sssssql7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler/sssssql7"/>
      <lastmod>2026-11-01T21:40:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler/sssssql7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler/sssssql7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler/sssssql7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler/sssssql7"/>
      <lastmod>2026-11-01T21:40:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-ratio/sssssqln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-ratio/sssssqln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-ratio/sssssqln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-ratio/sssssqln"/>
      <lastmod>2026-11-02T15:05:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-ratio/sssssqln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-ratio/sssssqln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-ratio/sssssqln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-ratio/sssssqln"/>
      <lastmod>2026-11-02T15:05:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-3-squares/sssssql2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-3-squares/sssssql2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-3-squares/sssssql2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-3-squares/sssssql2"/>
      <lastmod>2026-11-02T18:42:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-3-squares/sssssql2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-3-squares/sssssql2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-3-squares/sssssql2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-3-squares/sssssql2"/>
      <lastmod>2026-11-02T18:42:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-function-composition-with-vector-sequences/sssssqlk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-function-composition-with-vector-sequences/sssssqlk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-function-composition-with-vector-sequences/sssssqlk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-function-composition-with-vector-sequences/sssssqlk"/>
      <lastmod>2026-11-02T18:21:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-function-composition-with-vector-sequences/sssssqlk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-function-composition-with-vector-sequences/sssssqlk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-function-composition-with-vector-sequences/sssssqlk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-function-composition-with-vector-sequences/sssssqlk"/>
      <lastmod>2026-11-02T18:21:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-complex-numbers-calculus-example/sssssqlz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-complex-numbers-calculus-example/sssssqlz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-complex-numbers-calculus-example/sssssqlz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-complex-numbers-calculus-example/sssssqlz"/>
      <lastmod>2026-11-01T19:15:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-complex-numbers-calculus-example/sssssqlz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-complex-numbers-calculus-example/sssssqlz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-complex-numbers-calculus-example/sssssqlz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-complex-numbers-calculus-example/sssssqlz"/>
      <lastmod>2026-11-01T19:15:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-similar-rectangles/sssssql0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-similar-rectangles/sssssql0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-similar-rectangles/sssssql0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-similar-rectangles/sssssql0"/>
      <lastmod>2026-11-02T16:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-similar-rectangles/sssssql0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-similar-rectangles/sssssql0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-similar-rectangles/sssssql0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-similar-rectangles/sssssql0"/>
      <lastmod>2026-11-02T16:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ssa-counterexample-demonstration/sssssqld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ssa-counterexample-demonstration/sssssqld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ssa-counterexample-demonstration/sssssqld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ssa-counterexample-demonstration/sssssqld"/>
      <lastmod>2026-11-02T17:40:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ssa-counterexample-demonstration/sssssqld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ssa-counterexample-demonstration/sssssqld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ssa-counterexample-demonstration/sssssqld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ssa-counterexample-demonstration/sssssqld"/>
      <lastmod>2026-11-02T17:40:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-root-function/sssssqlf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-function/sssssqlf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-function/sssssqlf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-function/sssssqlf"/>
      <lastmod>2026-11-02T18:46:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-root-function/sssssqlf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-function/sssssqlf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-function/sssssqlf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-function/sssssqlf"/>
      <lastmod>2026-11-02T18:46:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sankagu13-math-example/sssssql8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sankagu13-math-example/sssssql8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sankagu13-math-example/sssssql8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sankagu13-math-example/sssssql8"/>
      <lastmod>2026-11-01T23:15:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sankagu13-math-example/sssssql8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sankagu13-math-example/sssssql8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sankagu13-math-example/sssssql8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sankagu13-math-example/sssssql8"/>
      <lastmod>2026-11-01T23:15:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/classifying-polygons/sssssqlu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-polygons/sssssqlu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-polygons/sssssqlu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-polygons/sssssqlu"/>
      <lastmod>2026-11-02T13:37:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/classifying-polygons/sssssqlu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-polygons/sssssqlu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-polygons/sssssqlu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-polygons/sssssqlu"/>
      <lastmod>2026-11-02T13:37:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-multiplication-division-and-absolute-value-dynagraph/sssssql5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-multiplication-division-and-absolute-value-dynagraph/sssssql5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-multiplication-division-and-absolute-value-dynagraph/sssssql5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-multiplication-division-and-absolute-value-dynagraph/sssssql5"/>
      <lastmod>2026-11-02T18:33:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-multiplication-division-and-absolute-value-dynagraph/sssssql5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-multiplication-division-and-absolute-value-dynagraph/sssssql5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-multiplication-division-and-absolute-value-dynagraph/sssssql5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-multiplication-division-and-absolute-value-dynagraph/sssssql5"/>
      <lastmod>2026-11-02T18:33:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-in-two-variables/sssssqlb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-in-two-variables/sssssqlb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-in-two-variables/sssssqlb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-in-two-variables/sssssqlb"/>
      <lastmod>2026-11-02T13:42:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-in-two-variables/sssssqlb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-in-two-variables/sssssqlb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-in-two-variables/sssssqlb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-in-two-variables/sssssqlb"/>
      <lastmod>2026-11-02T13:42:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dancing-triangle/sssssql3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dancing-triangle/sssssql3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dancing-triangle/sssssql3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dancing-triangle/sssssql3"/>
      <lastmod>2026-11-02T17:01:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dancing-triangle/sssssql3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dancing-triangle/sssssql3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dancing-triangle/sssssql3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dancing-triangle/sssssql3"/>
      <lastmod>2026-11-02T17:01:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/covid-19-data-fitting-and-geometric-analysis/sssssqlq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/covid-19-data-fitting-and-geometric-analysis/sssssqlq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/covid-19-data-fitting-and-geometric-analysis/sssssqlq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/covid-19-data-fitting-and-geometric-analysis/sssssqlq"/>
      <lastmod>2026-11-01T19:31:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/covid-19-data-fitting-and-geometric-analysis/sssssqlq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/covid-19-data-fitting-and-geometric-analysis/sssssqlq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/covid-19-data-fitting-and-geometric-analysis/sssssqlq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/covid-19-data-fitting-and-geometric-analysis/sssssqlq"/>
      <lastmod>2026-11-01T19:31:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-properties-demo-by-tony-wong/sssssql1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-properties-demo-by-tony-wong/sssssql1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-properties-demo-by-tony-wong/sssssql1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-properties-demo-by-tony-wong/sssssql1"/>
      <lastmod>2026-11-01T23:26:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-properties-demo-by-tony-wong/sssssql1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-properties-demo-by-tony-wong/sssssql1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-properties-demo-by-tony-wong/sssssql1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-properties-demo-by-tony-wong/sssssql1"/>
      <lastmod>2026-11-01T23:26:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-prism-by-mark-willis/sssssqlm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-by-mark-willis/sssssqlm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-by-mark-willis/sssssqlm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-by-mark-willis/sssssqlm"/>
      <lastmod>2026-11-02T12:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-prism-by-mark-willis/sssssqlm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-by-mark-willis/sssssqlm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-by-mark-willis/sssssqlm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-by-mark-willis/sssssqlm"/>
      <lastmod>2026-11-02T12:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-of-solids-exercise-15-4-1/sssssqlj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-solids-exercise-15-4-1/sssssqlj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-solids-exercise-15-4-1/sssssqlj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-solids-exercise-15-4-1/sssssqlj"/>
      <lastmod>2026-11-01T23:46:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-of-solids-exercise-15-4-1/sssssqlj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-solids-exercise-15-4-1/sssssqlj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-solids-exercise-15-4-1/sssssqlj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-solids-exercise-15-4-1/sssssqlj"/>
      <lastmod>2026-11-01T23:46:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-concentric-circles/sssssqlp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-concentric-circles/sssssqlp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-concentric-circles/sssssqlp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-concentric-circles/sssssqlp"/>
      <lastmod>2026-11-02T16:51:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-concentric-circles/sssssqlp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-concentric-circles/sssssqlp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-concentric-circles/sssssqlp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-concentric-circles/sssssqlp"/>
      <lastmod>2026-11-02T16:51:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations/sssssqlw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations/sssssqlw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations/sssssqlw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations/sssssqlw"/>
      <lastmod>2026-11-01T21:00:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations/sssssqlw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations/sssssqlw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations/sssssqlw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations/sssssqlw"/>
      <lastmod>2026-11-01T21:00:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-right-triangles-quiz-generator/sssssql6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles-quiz-generator/sssssql6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles-quiz-generator/sssssql6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles-quiz-generator/sssssql6"/>
      <lastmod>2026-11-02T13:42:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-right-triangles-quiz-generator/sssssql6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles-quiz-generator/sssssql6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles-quiz-generator/sssssql6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles-quiz-generator/sssssql6"/>
      <lastmod>2026-11-02T13:42:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/9-piece-puzzle-nolan/sssssqlg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/9-piece-puzzle-nolan/sssssqlg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/9-piece-puzzle-nolan/sssssqlg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/9-piece-puzzle-nolan/sssssqlg"/>
      <lastmod>2026-11-01T21:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/9-piece-puzzle-nolan/sssssqlg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/9-piece-puzzle-nolan/sssssqlg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/9-piece-puzzle-nolan/sssssqlg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/9-piece-puzzle-nolan/sssssqlg"/>
      <lastmod>2026-11-01T21:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-3-find-y-intercept-axis-of-symmet/sssssql9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-3-find-y-intercept-axis-of-symmet/sssssql9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-3-find-y-intercept-axis-of-symmet/sssssql9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-3-find-y-intercept-axis-of-symmet/sssssql9"/>
      <lastmod>2026-11-01T21:53:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-3-find-y-intercept-axis-of-symmet/sssssql9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-3-find-y-intercept-axis-of-symmet/sssssql9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-3-find-y-intercept-axis-of-symmet/sssssql9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-3-find-y-intercept-axis-of-symmet/sssssql9"/>
      <lastmod>2026-11-01T21:53:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-ratio-demo/sssssqle</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-ratio-demo/sssssqle"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-ratio-demo/sssssqle"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-ratio-demo/sssssqle"/>
      <lastmod>2026-11-01T23:58:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-ratio-demo/sssssqle</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-ratio-demo/sssssqle"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-ratio-demo/sssssqle"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-ratio-demo/sssssqle"/>
      <lastmod>2026-11-01T23:58:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/medians-and-centroid-dance-by-lindsay-ross/sssssqlv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-and-centroid-dance-by-lindsay-ross/sssssqlv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-and-centroid-dance-by-lindsay-ross/sssssqlv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-and-centroid-dance-by-lindsay-ross/sssssqlv"/>
      <lastmod>2026-11-01T23:56:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/medians-and-centroid-dance-by-lindsay-ross/sssssqlv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-and-centroid-dance-by-lindsay-ross/sssssqlv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-and-centroid-dance-by-lindsay-ross/sssssqlv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-and-centroid-dance-by-lindsay-ross/sssssqlv"/>
      <lastmod>2026-11-01T23:56:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curves-from-parametric-equations/sssssql4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curves-from-parametric-equations/sssssql4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curves-from-parametric-equations/sssssql4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curves-from-parametric-equations/sssssql4"/>
      <lastmod>2026-11-02T08:42:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curves-from-parametric-equations/sssssql4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curves-from-parametric-equations/sssssql4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curves-from-parametric-equations/sssssql4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curves-from-parametric-equations/sssssql4"/>
      <lastmod>2026-11-02T08:42:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-right-triangles-by-patrick-j-o-hara/sssssqll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-patrick-j-o-hara/sssssqll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles-by-patrick-j-o-hara/sssssqll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-patrick-j-o-hara/sssssqll"/>
      <lastmod>2026-11-02T13:54:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-right-triangles-by-patrick-j-o-hara/sssssqll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-patrick-j-o-hara/sssssqll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles-by-patrick-j-o-hara/sssssqll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-patrick-j-o-hara/sssssqll"/>
      <lastmod>2026-11-02T13:54:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-in-a-square-by-michael-bray/sssssqly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-in-a-square-by-michael-bray/sssssqly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-in-a-square-by-michael-bray/sssssqly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-in-a-square-by-michael-bray/sssssqly"/>
      <lastmod>2026-11-02T17:49:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-in-a-square-by-michael-bray/sssssqly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-in-a-square-by-michael-bray/sssssqly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-in-a-square-by-michael-bray/sssssqly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-in-a-square-by-michael-bray/sssssqly"/>
      <lastmod>2026-11-02T17:49:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-cylinder-volume-demonstration/sssssqla</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-cylinder-volume-demonstration/sssssqla"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-cylinder-volume-demonstration/sssssqla"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-cylinder-volume-demonstration/sssssqla"/>
      <lastmod>2026-11-01T21:29:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-cylinder-volume-demonstration/sssssqla</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-cylinder-volume-demonstration/sssssqla"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-cylinder-volume-demonstration/sssssqla"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-cylinder-volume-demonstration/sssssqla"/>
      <lastmod>2026-11-01T21:29:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/colored-concentric-heptagons-equally-spaced/sssssqlc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/colored-concentric-heptagons-equally-spaced/sssssqlc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/colored-concentric-heptagons-equally-spaced/sssssqlc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/colored-concentric-heptagons-equally-spaced/sssssqlc"/>
      <lastmod>2026-11-01T21:19:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/colored-concentric-heptagons-equally-spaced/sssssqlc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/colored-concentric-heptagons-equally-spaced/sssssqlc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/colored-concentric-heptagons-equally-spaced/sssssqlc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/colored-concentric-heptagons-equally-spaced/sssssqlc"/>
      <lastmod>2026-11-01T21:19:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/focus-and-directrix-parabola/sssssqlr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focus-and-directrix-parabola/sssssqlr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focus-and-directrix-parabola/sssssqlr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focus-and-directrix-parabola/sssssqlr"/>
      <lastmod>2026-11-02T00:48:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/focus-and-directrix-parabola/sssssqlr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focus-and-directrix-parabola/sssssqlr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focus-and-directrix-parabola/sssssqlr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focus-and-directrix-parabola/sssssqlr"/>
      <lastmod>2026-11-02T00:48:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-to-parabola/sssssqlh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-to-parabola/sssssqlh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-to-parabola/sssssqlh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-to-parabola/sssssqlh"/>
      <lastmod>2026-11-02T15:16:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-to-parabola/sssssqlh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-to-parabola/sssssqlh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-to-parabola/sssssqlh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-to-parabola/sssssqlh"/>
      <lastmod>2026-11-02T15:16:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-to-decimal-by-ibrahim-el-hage/sssssqlt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-to-decimal-by-ibrahim-el-hage/sssssqlt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-to-decimal-by-ibrahim-el-hage/sssssqlt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-to-decimal-by-ibrahim-el-hage/sssssqlt"/>
      <lastmod>2026-11-02T18:54:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-to-decimal-by-ibrahim-el-hage/sssssqlt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-to-decimal-by-ibrahim-el-hage/sssssqlt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-to-decimal-by-ibrahim-el-hage/sssssqlt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-to-decimal-by-ibrahim-el-hage/sssssqlt"/>
      <lastmod>2026-11-02T18:54:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-a-quadratic-function-by-ciara-folens/sssssqlx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-a-quadratic-function-by-ciara-folens/sssssqlx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-a-quadratic-function-by-ciara-folens/sssssqlx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-a-quadratic-function-by-ciara-folens/sssssqlx"/>
      <lastmod>2026-11-02T17:09:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-a-quadratic-function-by-ciara-folens/sssssqlx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-a-quadratic-function-by-ciara-folens/sssssqlx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-a-quadratic-function-by-ciara-folens/sssssqlx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-a-quadratic-function-by-ciara-folens/sssssqlx"/>
      <lastmod>2026-11-02T17:09:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-from-2-secants-interactive-exploration/sssssqli</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-from-2-secants-interactive-exploration/sssssqli"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-from-2-secants-interactive-exploration/sssssqli"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-from-2-secants-interactive-exploration/sssssqli"/>
      <lastmod>2026-11-01T21:46:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-from-2-secants-interactive-exploration/sssssqli</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-from-2-secants-interactive-exploration/sssssqli"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-from-2-secants-interactive-exploration/sssssqli"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-from-2-secants-interactive-exploration/sssssqli"/>
      <lastmod>2026-11-01T21:46:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-derivative-calculation/sssssqlo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-derivative-calculation/sssssqlo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-derivative-calculation/sssssqlo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-derivative-calculation/sssssqlo"/>
      <lastmod>2026-11-02T09:18:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-derivative-calculation/sssssqlo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-derivative-calculation/sssssqlo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-derivative-calculation/sssssqlo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-derivative-calculation/sssssqlo"/>
      <lastmod>2026-11-02T09:18:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-net/sssssqys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-net/sssssqys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-net/sssssqys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-net/sssssqys"/>
      <lastmod>2026-11-02T15:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-net/sssssqys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-net/sssssqys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-net/sssssqys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-net/sssssqys"/>
      <lastmod>2026-11-02T15:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-3-9-practice-solving-rate-problems/sssssqy7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-3-9-practice-solving-rate-problems/sssssqy7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-3-9-practice-solving-rate-problems/sssssqy7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-3-9-practice-solving-rate-problems/sssssqy7"/>
      <lastmod>2026-11-01T20:34:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-3-9-practice-solving-rate-problems/sssssqy7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-3-9-practice-solving-rate-problems/sssssqy7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-3-9-practice-solving-rate-problems/sssssqy7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-3-9-practice-solving-rate-problems/sssssqy7"/>
      <lastmod>2026-11-01T20:34:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logistic-vs-exponential-growth-models/sssssqyn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logistic-vs-exponential-growth-models/sssssqyn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logistic-vs-exponential-growth-models/sssssqyn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logistic-vs-exponential-growth-models/sssssqyn"/>
      <lastmod>2026-11-02T18:23:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logistic-vs-exponential-growth-models/sssssqyn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logistic-vs-exponential-growth-models/sssssqyn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logistic-vs-exponential-growth-models/sssssqyn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logistic-vs-exponential-growth-models/sssssqyn"/>
      <lastmod>2026-11-02T18:23:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinate-geometry-quick-investigation-of-parallel-lines/sssssqy2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-geometry-quick-investigation-of-parallel-lines/sssssqy2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-geometry-quick-investigation-of-parallel-lines/sssssqy2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-geometry-quick-investigation-of-parallel-lines/sssssqy2"/>
      <lastmod>2026-11-02T18:46:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinate-geometry-quick-investigation-of-parallel-lines/sssssqy2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-geometry-quick-investigation-of-parallel-lines/sssssqy2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-geometry-quick-investigation-of-parallel-lines/sssssqy2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-geometry-quick-investigation-of-parallel-lines/sssssqy2"/>
      <lastmod>2026-11-02T18:46:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/damped-pendulum/sssssqyk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/damped-pendulum/sssssqyk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/damped-pendulum/sssssqyk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/damped-pendulum/sssssqyk"/>
      <lastmod>2026-11-01T23:42:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/damped-pendulum/sssssqyk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/damped-pendulum/sssssqyk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/damped-pendulum/sssssqyk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/damped-pendulum/sssssqyk"/>
      <lastmod>2026-11-01T23:42:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/peak-wavelength-radiation-function-demo/sssssqyz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/peak-wavelength-radiation-function-demo/sssssqyz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/peak-wavelength-radiation-function-demo/sssssqyz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/peak-wavelength-radiation-function-demo/sssssqyz"/>
      <lastmod>2026-11-02T08:37:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/peak-wavelength-radiation-function-demo/sssssqyz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/peak-wavelength-radiation-function-demo/sssssqyz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/peak-wavelength-radiation-function-demo/sssssqyz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/peak-wavelength-radiation-function-demo/sssssqyz"/>
      <lastmod>2026-11-02T08:37:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-of-fractions-by-hemant-upreti-2/sssssqy0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-fractions-by-hemant-upreti-2/sssssqy0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-fractions-by-hemant-upreti-2/sssssqy0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-fractions-by-hemant-upreti-2/sssssqy0"/>
      <lastmod>2026-11-01T20:39:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-of-fractions-by-hemant-upreti-2/sssssqy0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-fractions-by-hemant-upreti-2/sssssqy0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-fractions-by-hemant-upreti-2/sssssqy0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-fractions-by-hemant-upreti-2/sssssqy0"/>
      <lastmod>2026-11-01T20:39:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translating-geometric-objects-by-vector-a-b/sssssqyd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-geometric-objects-by-vector-a-b/sssssqyd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-geometric-objects-by-vector-a-b/sssssqyd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-geometric-objects-by-vector-a-b/sssssqyd"/>
      <lastmod>2026-11-02T00:16:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translating-geometric-objects-by-vector-a-b/sssssqyd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-geometric-objects-by-vector-a-b/sssssqyd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-geometric-objects-by-vector-a-b/sssssqyd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-geometric-objects-by-vector-a-b/sssssqyd"/>
      <lastmod>2026-11-02T00:16:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-derivative-visual-tangent-planes-and-directional-slopes-on-a-surface/sssssqyf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivative-visual-tangent-planes-and-directional-slopes-on-a-surface/sssssqyf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivative-visual-tangent-planes-and-directional-slopes-on-a-surface/sssssqyf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivative-visual-tangent-planes-and-directional-slopes-on-a-surface/sssssqyf"/>
      <lastmod>2026-11-02T09:49:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-derivative-visual-tangent-planes-and-directional-slopes-on-a-surface/sssssqyf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivative-visual-tangent-planes-and-directional-slopes-on-a-surface/sssssqyf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivative-visual-tangent-planes-and-directional-slopes-on-a-surface/sssssqyf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivative-visual-tangent-planes-and-directional-slopes-on-a-surface/sssssqyf"/>
      <lastmod>2026-11-02T09:49:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-rusty-compass-exercise/sssssqy8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-rusty-compass-exercise/sssssqy8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-rusty-compass-exercise/sssssqy8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-rusty-compass-exercise/sssssqy8"/>
      <lastmod>2026-11-01T20:51:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-rusty-compass-exercise/sssssqy8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-rusty-compass-exercise/sssssqy8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-rusty-compass-exercise/sssssqy8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-rusty-compass-exercise/sssssqy8"/>
      <lastmod>2026-11-01T20:51:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-fraction-decomposition-interactive-demo/sssssqyu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-fraction-decomposition-interactive-demo/sssssqyu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-fraction-decomposition-interactive-demo/sssssqyu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-fraction-decomposition-interactive-demo/sssssqyu"/>
      <lastmod>2026-11-01T21:35:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-fraction-decomposition-interactive-demo/sssssqyu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-fraction-decomposition-interactive-demo/sssssqyu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-fraction-decomposition-interactive-demo/sssssqyu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-fraction-decomposition-interactive-demo/sssssqyu"/>
      <lastmod>2026-11-01T21:35:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diagonals-of-a-trapezoid/sssssqy5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-a-trapezoid/sssssqy5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-a-trapezoid/sssssqy5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-a-trapezoid/sssssqy5"/>
      <lastmod>2026-11-01T22:00:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diagonals-of-a-trapezoid/sssssqy5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-a-trapezoid/sssssqy5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-a-trapezoid/sssssqy5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-a-trapezoid/sssssqy5"/>
      <lastmod>2026-11-01T22:00:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbolas-and-location-relations/sssssqyb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolas-and-location-relations/sssssqyb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolas-and-location-relations/sssssqyb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolas-and-location-relations/sssssqyb"/>
      <lastmod>2026-11-01T19:15:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbolas-and-location-relations/sssssqyb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolas-and-location-relations/sssssqyb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolas-and-location-relations/sssssqyb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolas-and-location-relations/sssssqyb"/>
      <lastmod>2026-11-01T19:15:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-exploration-of-function-translations/sssssqy3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-function-translations/sssssqy3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-function-translations/sssssqy3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-function-translations/sssssqy3"/>
      <lastmod>2026-11-02T00:49:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-exploration-of-function-translations/sssssqy3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-function-translations/sssssqy3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-function-translations/sssssqy3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-function-translations/sssssqy3"/>
      <lastmod>2026-11-02T00:49:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-imaginary-component-1-z-2-1-2/sssssqyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-imaginary-component-1-z-2-1-2/sssssqyq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-imaginary-component-1-z-2-1-2/sssssqyq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-imaginary-component-1-z-2-1-2/sssssqyq"/>
      <lastmod>2026-11-01T23:33:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-imaginary-component-1-z-2-1-2/sssssqyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-imaginary-component-1-z-2-1-2/sssssqyq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-imaginary-component-1-z-2-1-2/sssssqyq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-imaginary-component-1-z-2-1-2/sssssqyq"/>
      <lastmod>2026-11-01T23:33:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-fraction-demonstration/sssssqy1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-fraction-demonstration/sssssqy1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-fraction-demonstration/sssssqy1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-fraction-demonstration/sssssqy1"/>
      <lastmod>2026-11-02T18:19:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-fraction-demonstration/sssssqy1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-fraction-demonstration/sssssqy1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-fraction-demonstration/sssssqy1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-fraction-demonstration/sssssqy1"/>
      <lastmod>2026-11-02T18:19:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tidal-accelerations-not-to-scale/sssssqym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tidal-accelerations-not-to-scale/sssssqym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tidal-accelerations-not-to-scale/sssssqym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tidal-accelerations-not-to-scale/sssssqym"/>
      <lastmod>2026-11-01T21:00:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tidal-accelerations-not-to-scale/sssssqym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tidal-accelerations-not-to-scale/sssssqym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tidal-accelerations-not-to-scale/sssssqym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tidal-accelerations-not-to-scale/sssssqym"/>
      <lastmod>2026-11-01T21:00:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solvemymaths-action-2-dynamic-geometry-optimization/sssssqyj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solvemymaths-action-2-dynamic-geometry-optimization/sssssqyj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solvemymaths-action-2-dynamic-geometry-optimization/sssssqyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solvemymaths-action-2-dynamic-geometry-optimization/sssssqyj"/>
      <lastmod>2026-11-02T00:54:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solvemymaths-action-2-dynamic-geometry-optimization/sssssqyj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solvemymaths-action-2-dynamic-geometry-optimization/sssssqyj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solvemymaths-action-2-dynamic-geometry-optimization/sssssqyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solvemymaths-action-2-dynamic-geometry-optimization/sssssqyj"/>
      <lastmod>2026-11-02T00:54:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-in-a-circle/sssssqyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-in-a-circle/sssssqyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-in-a-circle/sssssqyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-in-a-circle/sssssqyp"/>
      <lastmod>2026-11-02T02:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-in-a-circle/sssssqyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-in-a-circle/sssssqyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-in-a-circle/sssssqyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-in-a-circle/sssssqyp"/>
      <lastmod>2026-11-02T02:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conics-as-intersection-of-double-cone-with-plane/sssssqyw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conics-as-intersection-of-double-cone-with-plane/sssssqyw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conics-as-intersection-of-double-cone-with-plane/sssssqyw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conics-as-intersection-of-double-cone-with-plane/sssssqyw"/>
      <lastmod>2026-11-01T23:47:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conics-as-intersection-of-double-cone-with-plane/sssssqyw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conics-as-intersection-of-double-cone-with-plane/sssssqyw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conics-as-intersection-of-double-cone-with-plane/sssssqyw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conics-as-intersection-of-double-cone-with-plane/sssssqyw"/>
      <lastmod>2026-11-01T23:47:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-drawing-exercise/sssssqy6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-drawing-exercise/sssssqy6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-drawing-exercise/sssssqy6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-drawing-exercise/sssssqy6"/>
      <lastmod>2026-11-02T14:56:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-drawing-exercise/sssssqy6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-drawing-exercise/sssssqy6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-drawing-exercise/sssssqy6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-drawing-exercise/sssssqy6"/>
      <lastmod>2026-11-02T14:56:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-in-a-deck-of-32-cards/sssssqyg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-in-a-deck-of-32-cards/sssssqyg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-in-a-deck-of-32-cards/sssssqyg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-in-a-deck-of-32-cards/sssssqyg"/>
      <lastmod>2026-11-01T19:36:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-in-a-deck-of-32-cards/sssssqyg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-in-a-deck-of-32-cards/sssssqyg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-in-a-deck-of-32-cards/sssssqyg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-in-a-deck-of-32-cards/sssssqyg"/>
      <lastmod>2026-11-01T19:36:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-flower-rosette/sssssqy9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-flower-rosette/sssssqy9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-flower-rosette/sssssqy9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-flower-rosette/sssssqy9"/>
      <lastmod>2026-11-01T19:21:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-flower-rosette/sssssqy9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-flower-rosette/sssssqy9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-flower-rosette/sssssqy9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-flower-rosette/sssssqy9"/>
      <lastmod>2026-11-01T19:21:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-and-surface-area-of-triangular-prism-by-binaya-raj-shrestha/sssssqye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-triangular-prism-by-binaya-raj-shrestha/sssssqye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-and-surface-area-of-triangular-prism-by-binaya-raj-shrestha/sssssqye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-triangular-prism-by-binaya-raj-shrestha/sssssqye"/>
      <lastmod>2026-11-01T21:53:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-and-surface-area-of-triangular-prism-by-binaya-raj-shrestha/sssssqye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-triangular-prism-by-binaya-raj-shrestha/sssssqye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-and-surface-area-of-triangular-prism-by-binaya-raj-shrestha/sssssqye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-triangular-prism-by-binaya-raj-shrestha/sssssqye"/>
      <lastmod>2026-11-01T21:53:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-pyramid-and-its-properties/sssssqyv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid-and-its-properties/sssssqyv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid-and-its-properties/sssssqyv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid-and-its-properties/sssssqyv"/>
      <lastmod>2026-11-01T23:09:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-pyramid-and-its-properties/sssssqyv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid-and-its-properties/sssssqyv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid-and-its-properties/sssssqyv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid-and-its-properties/sssssqyv"/>
      <lastmod>2026-11-01T23:09:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solve-linear-equation-example-2/sssssqy4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-linear-equation-example-2/sssssqy4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-linear-equation-example-2/sssssqy4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-linear-equation-example-2/sssssqy4"/>
      <lastmod>2026-11-02T00:49:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solve-linear-equation-example-2/sssssqy4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-linear-equation-example-2/sssssqy4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-linear-equation-example-2/sssssqy4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-linear-equation-example-2/sssssqy4"/>
      <lastmod>2026-11-02T00:49:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan-3/sssssqyl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan-3/sssssqyl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-demonstration-by-d-jayaseelan-3/sssssqyl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan-3/sssssqyl"/>
      <lastmod>2026-11-02T17:52:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-subtraction-demonstration-by-d-jayaseelan-3/sssssqyl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan-3/sssssqyl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-demonstration-by-d-jayaseelan-3/sssssqyl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan-3/sssssqyl"/>
      <lastmod>2026-11-02T17:52:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-graph-and-integral-calculus-demo/sssssqyy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graph-and-integral-calculus-demo/sssssqyy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graph-and-integral-calculus-demo/sssssqyy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graph-and-integral-calculus-demo/sssssqyy"/>
      <lastmod>2026-11-01T23:28:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-graph-and-integral-calculus-demo/sssssqyy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graph-and-integral-calculus-demo/sssssqyy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graph-and-integral-calculus-demo/sssssqyy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graph-and-integral-calculus-demo/sssssqyy"/>
      <lastmod>2026-11-01T23:28:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/house-example/sssssqya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/house-example/sssssqya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/house-example/sssssqya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/house-example/sssssqya"/>
      <lastmod>2026-11-01T21:22:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/house-example/sssssqya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/house-example/sssssqya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/house-example/sssssqya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/house-example/sssssqya"/>
      <lastmod>2026-11-01T21:22:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/understanding-points-lines-and-planes-foundational-geometry/sssssqyc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-points-lines-and-planes-foundational-geometry/sssssqyc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-points-lines-and-planes-foundational-geometry/sssssqyc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-points-lines-and-planes-foundational-geometry/sssssqyc"/>
      <lastmod>2026-11-01T21:31:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/understanding-points-lines-and-planes-foundational-geometry/sssssqyc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-points-lines-and-planes-foundational-geometry/sssssqyc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-points-lines-and-planes-foundational-geometry/sssssqyc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-points-lines-and-planes-foundational-geometry/sssssqyc"/>
      <lastmod>2026-11-01T21:31:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/washers-and-cylinders/sssssqyr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/washers-and-cylinders/sssssqyr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/washers-and-cylinders/sssssqyr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/washers-and-cylinders/sssssqyr"/>
      <lastmod>2026-11-02T17:49:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/washers-and-cylinders/sssssqyr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/washers-and-cylinders/sssssqyr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/washers-and-cylinders/sssssqyr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/washers-and-cylinders/sssssqyr"/>
      <lastmod>2026-11-02T17:49:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mandelbrot-set-by-mrjhardy/sssssqyh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mandelbrot-set-by-mrjhardy/sssssqyh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mandelbrot-set-by-mrjhardy/sssssqyh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mandelbrot-set-by-mrjhardy/sssssqyh"/>
      <lastmod>2026-11-01T19:16:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mandelbrot-set-by-mrjhardy/sssssqyh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mandelbrot-set-by-mrjhardy/sssssqyh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mandelbrot-set-by-mrjhardy/sssssqyh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mandelbrot-set-by-mrjhardy/sssssqyh"/>
      <lastmod>2026-11-01T19:16:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-cyclic-and-circumscribable-polygons/sssssqyt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-cyclic-and-circumscribable-polygons/sssssqyt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-cyclic-and-circumscribable-polygons/sssssqyt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-cyclic-and-circumscribable-polygons/sssssqyt"/>
      <lastmod>2026-11-02T16:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-cyclic-and-circumscribable-polygons/sssssqyt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-cyclic-and-circumscribable-polygons/sssssqyt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-cyclic-and-circumscribable-polygons/sssssqyt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-cyclic-and-circumscribable-polygons/sssssqyt"/>
      <lastmod>2026-11-02T16:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-construction-example-ellipse-and-ratios/sssssqyx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-construction-example-ellipse-and-ratios/sssssqyx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-construction-example-ellipse-and-ratios/sssssqyx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-construction-example-ellipse-and-ratios/sssssqyx"/>
      <lastmod>2026-11-02T17:51:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-construction-example-ellipse-and-ratios/sssssqyx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-construction-example-ellipse-and-ratios/sssssqyx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-construction-example-ellipse-and-ratios/sssssqyx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-construction-example-ellipse-and-ratios/sssssqyx"/>
      <lastmod>2026-11-02T17:51:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-3-main-trigonometric-ratios/sssssqyi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-3-main-trigonometric-ratios/sssssqyi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-3-main-trigonometric-ratios/sssssqyi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-3-main-trigonometric-ratios/sssssqyi"/>
      <lastmod>2026-11-01T21:18:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-3-main-trigonometric-ratios/sssssqyi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-3-main-trigonometric-ratios/sssssqyi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-3-main-trigonometric-ratios/sssssqyi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-3-main-trigonometric-ratios/sssssqyi"/>
      <lastmod>2026-11-01T21:18:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-to-convert-a-mixed-number-to-an-improper-fraction/sssssqyo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-to-convert-a-mixed-number-to-an-improper-fraction/sssssqyo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-to-convert-a-mixed-number-to-an-improper-fraction/sssssqyo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-to-convert-a-mixed-number-to-an-improper-fraction/sssssqyo"/>
      <lastmod>2026-11-02T15:37:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-to-convert-a-mixed-number-to-an-improper-fraction/sssssqyo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-to-convert-a-mixed-number-to-an-improper-fraction/sssssqyo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-to-convert-a-mixed-number-to-an-improper-fraction/sssssqyo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-to-convert-a-mixed-number-to-an-improper-fraction/sssssqyo"/>
      <lastmod>2026-11-02T15:37:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-model-using-unit-cubes/sssssqas</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-model-using-unit-cubes/sssssqas"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-model-using-unit-cubes/sssssqas"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-model-using-unit-cubes/sssssqas"/>
      <lastmod>2026-11-02T00:54:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-model-using-unit-cubes/sssssqas</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-model-using-unit-cubes/sssssqas"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-model-using-unit-cubes/sssssqas"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-model-using-unit-cubes/sssssqas"/>
      <lastmod>2026-11-02T00:54:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley-3/sssssqa7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley-3/sssssqa7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-by-harrytomalley-3/sssssqa7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley-3/sssssqa7"/>
      <lastmod>2026-11-02T17:40:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-by-harrytomalley-3/sssssqa7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley-3/sssssqa7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-by-harrytomalley-3/sssssqa7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley-3/sssssqa7"/>
      <lastmod>2026-11-02T17:40:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-the-lemniscate-of-bernoulli-in-3d/sssssqan</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-the-lemniscate-of-bernoulli-in-3d/sssssqan"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-the-lemniscate-of-bernoulli-in-3d/sssssqan"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-the-lemniscate-of-bernoulli-in-3d/sssssqan"/>
      <lastmod>2026-11-02T16:44:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-the-lemniscate-of-bernoulli-in-3d/sssssqan</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-the-lemniscate-of-bernoulli-in-3d/sssssqan"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-the-lemniscate-of-bernoulli-in-3d/sssssqan"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-the-lemniscate-of-bernoulli-in-3d/sssssqan"/>
      <lastmod>2026-11-02T16:44:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/associativity-of-vector-addition-in-3d/sssssqa2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/associativity-of-vector-addition-in-3d/sssssqa2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/associativity-of-vector-addition-in-3d/sssssqa2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/associativity-of-vector-addition-in-3d/sssssqa2"/>
      <lastmod>2026-11-01T21:41:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/associativity-of-vector-addition-in-3d/sssssqa2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/associativity-of-vector-addition-in-3d/sssssqa2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/associativity-of-vector-addition-in-3d/sssssqa2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/associativity-of-vector-addition-in-3d/sssssqa2"/>
      <lastmod>2026-11-01T21:41:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-function-transformation-example/sssssqak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-function-transformation-example/sssssqak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-function-transformation-example/sssssqak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-function-transformation-example/sssssqak"/>
      <lastmod>2026-11-02T13:49:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-function-transformation-example/sssssqak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-function-transformation-example/sssssqak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-function-transformation-example/sssssqak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-function-transformation-example/sssssqak"/>
      <lastmod>2026-11-02T13:49:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-demo-for-parameter-r-in-3-3/sssssqaz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-demo-for-parameter-r-in-3-3/sssssqaz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-demo-for-parameter-r-in-3-3/sssssqaz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-demo-for-parameter-r-in-3-3/sssssqaz"/>
      <lastmod>2026-11-02T17:02:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-demo-for-parameter-r-in-3-3/sssssqaz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-demo-for-parameter-r-in-3-3/sssssqaz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-demo-for-parameter-r-in-3-3/sssssqaz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-demo-for-parameter-r-in-3-3/sssssqaz"/>
      <lastmod>2026-11-02T17:02:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modifiable-random-polygons/sssssqa0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-random-polygons/sssssqa0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-random-polygons/sssssqa0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-random-polygons/sssssqa0"/>
      <lastmod>2026-11-01T21:14:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modifiable-random-polygons/sssssqa0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-random-polygons/sssssqa0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-random-polygons/sssssqa0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-random-polygons/sssssqa0"/>
      <lastmod>2026-11-01T21:14:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/classic-eames-special-right-triangles-demo/sssssqad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classic-eames-special-right-triangles-demo/sssssqad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classic-eames-special-right-triangles-demo/sssssqad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classic-eames-special-right-triangles-demo/sssssqad"/>
      <lastmod>2026-11-02T18:33:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/classic-eames-special-right-triangles-demo/sssssqad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classic-eames-special-right-triangles-demo/sssssqad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classic-eames-special-right-triangles-demo/sssssqad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classic-eames-special-right-triangles-demo/sssssqad"/>
      <lastmod>2026-11-02T18:33:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/optimization-maximum-rectangle-inscribed-in-a-triangle/sssssqaf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-maximum-rectangle-inscribed-in-a-triangle/sssssqaf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-maximum-rectangle-inscribed-in-a-triangle/sssssqaf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-maximum-rectangle-inscribed-in-a-triangle/sssssqaf"/>
      <lastmod>2026-11-02T18:29:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/optimization-maximum-rectangle-inscribed-in-a-triangle/sssssqaf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-maximum-rectangle-inscribed-in-a-triangle/sssssqaf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-maximum-rectangle-inscribed-in-a-triangle/sssssqaf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-maximum-rectangle-inscribed-in-a-triangle/sssssqaf"/>
      <lastmod>2026-11-02T18:29:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/power-of-super-symmetry-by-timur-kapitsa/sssssqa8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-of-super-symmetry-by-timur-kapitsa/sssssqa8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-of-super-symmetry-by-timur-kapitsa/sssssqa8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-of-super-symmetry-by-timur-kapitsa/sssssqa8"/>
      <lastmod>2026-11-01T23:28:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/power-of-super-symmetry-by-timur-kapitsa/sssssqa8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-of-super-symmetry-by-timur-kapitsa/sssssqa8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-of-super-symmetry-by-timur-kapitsa/sssssqa8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-of-super-symmetry-by-timur-kapitsa/sssssqa8"/>
      <lastmod>2026-11-01T23:28:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/5-fold-symmetry-pattern/sssssqau</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/5-fold-symmetry-pattern/sssssqau"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/5-fold-symmetry-pattern/sssssqau"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/5-fold-symmetry-pattern/sssssqau"/>
      <lastmod>2026-11-01T21:03:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/5-fold-symmetry-pattern/sssssqau</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/5-fold-symmetry-pattern/sssssqau"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/5-fold-symmetry-pattern/sssssqau"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/5-fold-symmetry-pattern/sssssqau"/>
      <lastmod>2026-11-01T21:03:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-naming-interactive-visual-learning-of-numerators-and-denominators/sssssqa5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-naming-interactive-visual-learning-of-numerators-and-denominators/sssssqa5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-naming-interactive-visual-learning-of-numerators-and-denominators/sssssqa5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-naming-interactive-visual-learning-of-numerators-and-denominators/sssssqa5"/>
      <lastmod>2026-11-01T21:58:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-naming-interactive-visual-learning-of-numerators-and-denominators/sssssqa5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-naming-interactive-visual-learning-of-numerators-and-denominators/sssssqa5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-naming-interactive-visual-learning-of-numerators-and-denominators/sssssqa5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-naming-interactive-visual-learning-of-numerators-and-denominators/sssssqa5"/>
      <lastmod>2026-11-01T21:58:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mixing-paints-using-ratios/sssssqab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixing-paints-using-ratios/sssssqab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixing-paints-using-ratios/sssssqab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixing-paints-using-ratios/sssssqab"/>
      <lastmod>2026-11-02T15:10:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mixing-paints-using-ratios/sssssqab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixing-paints-using-ratios/sssssqab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixing-paints-using-ratios/sssssqab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixing-paints-using-ratios/sssssqab"/>
      <lastmod>2026-11-02T15:10:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-164-geometric-transformations-and-polygon-construction/sssssqa3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-164-geometric-transformations-and-polygon-construction/sssssqa3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-164-geometric-transformations-and-polygon-construction/sssssqa3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-164-geometric-transformations-and-polygon-construction/sssssqa3"/>
      <lastmod>2026-11-02T13:56:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-164-geometric-transformations-and-polygon-construction/sssssqa3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-164-geometric-transformations-and-polygon-construction/sssssqa3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-164-geometric-transformations-and-polygon-construction/sssssqa3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-164-geometric-transformations-and-polygon-construction/sssssqa3"/>
      <lastmod>2026-11-02T13:56:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-4-2-practice-meanings-of-division/sssssqaq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-4-2-practice-meanings-of-division/sssssqaq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-4-2-practice-meanings-of-division/sssssqaq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-4-2-practice-meanings-of-division/sssssqaq"/>
      <lastmod>2026-11-01T23:05:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-4-2-practice-meanings-of-division/sssssqaq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-4-2-practice-meanings-of-division/sssssqaq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-4-2-practice-meanings-of-division/sssssqaq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-4-2-practice-meanings-of-division/sssssqaq"/>
      <lastmod>2026-11-01T23:05:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/b-centroid-construction/sssssqa1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/b-centroid-construction/sssssqa1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/b-centroid-construction/sssssqa1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/b-centroid-construction/sssssqa1"/>
      <lastmod>2026-11-02T17:56:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/b-centroid-construction/sssssqa1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/b-centroid-construction/sssssqa1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/b-centroid-construction/sssssqa1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/b-centroid-construction/sssssqa1"/>
      <lastmod>2026-11-02T17:56:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/composite-solid-mailbox-or-backpack/sssssqam</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-solid-mailbox-or-backpack/sssssqam"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-solid-mailbox-or-backpack/sssssqam"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-solid-mailbox-or-backpack/sssssqam"/>
      <lastmod>2026-11-01T21:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/composite-solid-mailbox-or-backpack/sssssqam</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-solid-mailbox-or-backpack/sssssqam"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-solid-mailbox-or-backpack/sssssqam"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-solid-mailbox-or-backpack/sssssqam"/>
      <lastmod>2026-11-01T21:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-the-orthocenter-locus-in-triangles/sssssqaj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-the-orthocenter-locus-in-triangles/sssssqaj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-the-orthocenter-locus-in-triangles/sssssqaj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-the-orthocenter-locus-in-triangles/sssssqaj"/>
      <lastmod>2026-11-02T00:20:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-the-orthocenter-locus-in-triangles/sssssqaj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-the-orthocenter-locus-in-triangles/sssssqaj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-the-orthocenter-locus-in-triangles/sssssqaj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-the-orthocenter-locus-in-triangles/sssssqaj"/>
      <lastmod>2026-11-02T00:20:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-using-circles/sssssqap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-using-circles/sssssqap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-using-circles/sssssqap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-using-circles/sssssqap"/>
      <lastmod>2026-11-01T21:33:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-using-circles/sssssqap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-using-circles/sssssqap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-using-circles/sssssqap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-using-circles/sssssqap"/>
      <lastmod>2026-11-01T21:33:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/root-rectangles-by-lecel-celec/sssssqaw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangles-by-lecel-celec/sssssqaw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangles-by-lecel-celec/sssssqaw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangles-by-lecel-celec/sssssqaw"/>
      <lastmod>2026-11-01T23:29:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/root-rectangles-by-lecel-celec/sssssqaw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangles-by-lecel-celec/sssssqaw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangles-by-lecel-celec/sssssqaw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangles-by-lecel-celec/sssssqaw"/>
      <lastmod>2026-11-01T23:29:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/division-i-exploring-geometry-and-fractions/sssssqa6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-i-exploring-geometry-and-fractions/sssssqa6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-i-exploring-geometry-and-fractions/sssssqa6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-i-exploring-geometry-and-fractions/sssssqa6"/>
      <lastmod>2026-11-02T02:29:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/division-i-exploring-geometry-and-fractions/sssssqa6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-i-exploring-geometry-and-fractions/sssssqa6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-i-exploring-geometry-and-fractions/sssssqa6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-i-exploring-geometry-and-fractions/sssssqa6"/>
      <lastmod>2026-11-02T02:29:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-a-line-and-a-plane-by-anthony-or/sssssqag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-a-line-and-a-plane-by-anthony-or/sssssqag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-a-line-and-a-plane-by-anthony-or/sssssqag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-a-line-and-a-plane-by-anthony-or/sssssqag"/>
      <lastmod>2026-11-02T16:44:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-a-line-and-a-plane-by-anthony-or/sssssqag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-a-line-and-a-plane-by-anthony-or/sssssqag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-a-line-and-a-plane-by-anthony-or/sssssqag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-a-line-and-a-plane-by-anthony-or/sssssqag"/>
      <lastmod>2026-11-02T16:44:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebra-2-summative-exponents-roots-and-logarithms/sssssqa9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-summative-exponents-roots-and-logarithms/sssssqa9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-summative-exponents-roots-and-logarithms/sssssqa9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-summative-exponents-roots-and-logarithms/sssssqa9"/>
      <lastmod>2026-11-01T23:36:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebra-2-summative-exponents-roots-and-logarithms/sssssqa9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-summative-exponents-roots-and-logarithms/sssssqa9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-summative-exponents-roots-and-logarithms/sssssqa9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-summative-exponents-roots-and-logarithms/sssssqa9"/>
      <lastmod>2026-11-01T23:36:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/taylor-series-expansion-of-sine-function/sssssqae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-series-expansion-of-sine-function/sssssqae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-series-expansion-of-sine-function/sssssqae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-series-expansion-of-sine-function/sssssqae"/>
      <lastmod>2026-11-02T00:38:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/taylor-series-expansion-of-sine-function/sssssqae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-series-expansion-of-sine-function/sssssqae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-series-expansion-of-sine-function/sssssqae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-series-expansion-of-sine-function/sssssqae"/>
      <lastmod>2026-11-02T00:38:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/check-is-it-a-perpendicular-bisector-sssssgzs/sssssqav</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-is-it-a-perpendicular-bisector-sssssgzs/sssssqav"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-is-it-a-perpendicular-bisector-sssssgzs/sssssqav"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-is-it-a-perpendicular-bisector-sssssgzs/sssssqav"/>
      <lastmod>2026-11-01T21:15:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/check-is-it-a-perpendicular-bisector-sssssgzs/sssssqav</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-is-it-a-perpendicular-bisector-sssssgzs/sssssqav"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-is-it-a-perpendicular-bisector-sssssgzs/sssssqav"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-is-it-a-perpendicular-bisector-sssssgzs/sssssqav"/>
      <lastmod>2026-11-01T21:15:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparison-of-volume-of-prism-and-pyramid/sssssqa4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparison-of-volume-of-prism-and-pyramid/sssssqa4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparison-of-volume-of-prism-and-pyramid/sssssqa4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparison-of-volume-of-prism-and-pyramid/sssssqa4"/>
      <lastmod>2026-11-02T17:18:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparison-of-volume-of-prism-and-pyramid/sssssqa4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparison-of-volume-of-prism-and-pyramid/sssssqa4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparison-of-volume-of-prism-and-pyramid/sssssqa4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparison-of-volume-of-prism-and-pyramid/sssssqa4"/>
      <lastmod>2026-11-02T17:18:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-parallelogram-and-triangle-law-demonstration/sssssqal</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-parallelogram-and-triangle-law-demonstration/sssssqal"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-parallelogram-and-triangle-law-demonstration/sssssqal"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-parallelogram-and-triangle-law-demonstration/sssssqal"/>
      <lastmod>2026-11-02T18:13:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-parallelogram-and-triangle-law-demonstration/sssssqal</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-parallelogram-and-triangle-law-demonstration/sssssqal"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-parallelogram-and-triangle-law-demonstration/sssssqal"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-parallelogram-and-triangle-law-demonstration/sssssqal"/>
      <lastmod>2026-11-02T18:13:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization-by-david-wees-2/sssssqay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization-by-david-wees-2/sssssqay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-and-distribution-visualization-by-david-wees-2/sssssqay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization-by-david-wees-2/sssssqay"/>
      <lastmod>2026-11-02T18:35:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-deviation-and-distribution-visualization-by-david-wees-2/sssssqay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization-by-david-wees-2/sssssqay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-and-distribution-visualization-by-david-wees-2/sssssqay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization-by-david-wees-2/sssssqay"/>
      <lastmod>2026-11-02T18:35:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle-construction/sssssqaa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle-construction/sssssqaa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-inscribed-in-a-circle-construction/sssssqaa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle-construction/sssssqaa"/>
      <lastmod>2026-11-01T21:53:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-inscribed-in-a-circle-construction/sssssqaa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle-construction/sssssqaa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-inscribed-in-a-circle-construction/sssssqaa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle-construction/sssssqaa"/>
      <lastmod>2026-11-01T21:53:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-by-malin-christersson/sssssqac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-by-malin-christersson/sssssqac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-by-malin-christersson/sssssqac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-by-malin-christersson/sssssqac"/>
      <lastmod>2026-11-02T18:27:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-by-malin-christersson/sssssqac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-by-malin-christersson/sssssqac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-by-malin-christersson/sssssqac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-by-malin-christersson/sssssqac"/>
      <lastmod>2026-11-02T18:27:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-and-pyramid-construction-solid-geometry-visualization/sssssqar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-pyramid-construction-solid-geometry-visualization/sssssqar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-pyramid-construction-solid-geometry-visualization/sssssqar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-pyramid-construction-solid-geometry-visualization/sssssqar"/>
      <lastmod>2026-11-02T00:45:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-and-pyramid-construction-solid-geometry-visualization/sssssqar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-pyramid-construction-solid-geometry-visualization/sssssqar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-pyramid-construction-solid-geometry-visualization/sssssqar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-pyramid-construction-solid-geometry-visualization/sssssqar"/>
      <lastmod>2026-11-02T00:45:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-and-cones/sssssqah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-cones/sssssqah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-cones/sssssqah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-cones/sssssqah"/>
      <lastmod>2026-11-02T17:51:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-and-cones/sssssqah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-cones/sssssqah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-cones/sssssqah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-cones/sssssqah"/>
      <lastmod>2026-11-02T17:51:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-rule-dynamic-numerical-integration-demo/sssssqat</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-rule-dynamic-numerical-integration-demo/sssssqat"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-rule-dynamic-numerical-integration-demo/sssssqat"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-rule-dynamic-numerical-integration-demo/sssssqat"/>
      <lastmod>2026-11-01T21:08:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-rule-dynamic-numerical-integration-demo/sssssqat</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-rule-dynamic-numerical-integration-demo/sssssqat"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-rule-dynamic-numerical-integration-demo/sssssqat"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-rule-dynamic-numerical-integration-demo/sssssqat"/>
      <lastmod>2026-11-01T21:08:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wave-equation-on-a-line/sssssqax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-equation-on-a-line/sssssqax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-equation-on-a-line/sssssqax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-equation-on-a-line/sssssqax"/>
      <lastmod>2026-11-02T18:03:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wave-equation-on-a-line/sssssqax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-equation-on-a-line/sssssqax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-equation-on-a-line/sssssqax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-equation-on-a-line/sssssqax"/>
      <lastmod>2026-11-02T18:03:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-cross-sections-of-pyramids/sssssqai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-cross-sections-of-pyramids/sssssqai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-cross-sections-of-pyramids/sssssqai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-cross-sections-of-pyramids/sssssqai"/>
      <lastmod>2026-11-02T18:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-cross-sections-of-pyramids/sssssqai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-cross-sections-of-pyramids/sssssqai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-cross-sections-of-pyramids/sssssqai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-cross-sections-of-pyramids/sssssqai"/>
      <lastmod>2026-11-02T18:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nth-root/sssssqao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nth-root/sssssqao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nth-root/sssssqao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nth-root/sssssqao"/>
      <lastmod>2026-11-02T18:03:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nth-root/sssssqao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nth-root/sssssqao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nth-root/sssssqao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nth-root/sssssqao"/>
      <lastmod>2026-11-02T18:03:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-sine-cosine-graphs/sssssqcs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-cosine-graphs/sssssqcs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-cosine-graphs/sssssqcs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-cosine-graphs/sssssqcs"/>
      <lastmod>2026-11-02T02:15:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-sine-cosine-graphs/sssssqcs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-cosine-graphs/sssssqcs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-cosine-graphs/sssssqcs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-cosine-graphs/sssssqcs"/>
      <lastmod>2026-11-02T02:15:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-congruent-triangles/sssssqc7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-congruent-triangles/sssssqc7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-congruent-triangles/sssssqc7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-congruent-triangles/sssssqc7"/>
      <lastmod>2026-11-01T23:29:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-congruent-triangles/sssssqc7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-congruent-triangles/sssssqc7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-congruent-triangles/sssssqc7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-congruent-triangles/sssssqc7"/>
      <lastmod>2026-11-01T23:29:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisector-and-circle/sssssqcn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-and-circle/sssssqcn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-and-circle/sssssqcn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-and-circle/sssssqcn"/>
      <lastmod>2026-11-02T02:24:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisector-and-circle/sssssqcn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-and-circle/sssssqcn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-and-circle/sssssqcn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-and-circle/sssssqcn"/>
      <lastmod>2026-11-02T02:24:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/generalizing-distance-in-2d/sssssqc2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generalizing-distance-in-2d/sssssqc2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generalizing-distance-in-2d/sssssqc2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generalizing-distance-in-2d/sssssqc2"/>
      <lastmod>2026-11-02T08:46:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/generalizing-distance-in-2d/sssssqc2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generalizing-distance-in-2d/sssssqc2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generalizing-distance-in-2d/sssssqc2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generalizing-distance-in-2d/sssssqc2"/>
      <lastmod>2026-11-02T08:46:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/building-parallelograms-with-given-area-quick-formative-assessment/sssssqck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/building-parallelograms-with-given-area-quick-formative-assessment/sssssqck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/building-parallelograms-with-given-area-quick-formative-assessment/sssssqck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/building-parallelograms-with-given-area-quick-formative-assessment/sssssqck"/>
      <lastmod>2026-11-01T23:42:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/building-parallelograms-with-given-area-quick-formative-assessment/sssssqck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/building-parallelograms-with-given-area-quick-formative-assessment/sssssqck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/building-parallelograms-with-given-area-quick-formative-assessment/sssssqck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/building-parallelograms-with-given-area-quick-formative-assessment/sssssqck"/>
      <lastmod>2026-11-01T23:42:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-functions-demo/sssssqcz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-functions-demo/sssssqcz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-functions-demo/sssssqcz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-functions-demo/sssssqcz"/>
      <lastmod>2026-11-01T19:35:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-functions-demo/sssssqcz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-functions-demo/sssssqcz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-functions-demo/sssssqcz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-functions-demo/sssssqcz"/>
      <lastmod>2026-11-01T19:35:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wave-addition/sssssqc0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-addition/sssssqc0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-addition/sssssqc0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-addition/sssssqc0"/>
      <lastmod>2026-11-02T08:58:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wave-addition/sssssqc0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-addition/sssssqc0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-addition/sssssqc0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-addition/sssssqc0"/>
      <lastmod>2026-11-02T08:58:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-sum-property-for-the-definite-integral/sssssqcd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-sum-property-for-the-definite-integral/sssssqcd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-sum-property-for-the-definite-integral/sssssqcd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-sum-property-for-the-definite-integral/sssssqcd"/>
      <lastmod>2026-11-02T17:40:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-sum-property-for-the-definite-integral/sssssqcd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-sum-property-for-the-definite-integral/sssssqcd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-sum-property-for-the-definite-integral/sssssqcd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-sum-property-for-the-definite-integral/sssssqcd"/>
      <lastmod>2026-11-02T17:40:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mae-s-pyramid-net/sssssqcf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mae-s-pyramid-net/sssssqcf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mae-s-pyramid-net/sssssqcf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mae-s-pyramid-net/sssssqcf"/>
      <lastmod>2026-11-02T13:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mae-s-pyramid-net/sssssqcf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mae-s-pyramid-net/sssssqcf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mae-s-pyramid-net/sssssqcf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mae-s-pyramid-net/sssssqcf"/>
      <lastmod>2026-11-02T13:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/high-speed-train-trip-as-piecewise-linear-function/sssssqc8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/high-speed-train-trip-as-piecewise-linear-function/sssssqc8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/high-speed-train-trip-as-piecewise-linear-function/sssssqc8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/high-speed-train-trip-as-piecewise-linear-function/sssssqc8"/>
      <lastmod>2026-11-02T02:49:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/high-speed-train-trip-as-piecewise-linear-function/sssssqc8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/high-speed-train-trip-as-piecewise-linear-function/sssssqc8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/high-speed-train-trip-as-piecewise-linear-function/sssssqc8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/high-speed-train-trip-as-piecewise-linear-function/sssssqc8"/>
      <lastmod>2026-11-02T02:49:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planes-and-solids-demo/sssssqcu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-and-solids-demo/sssssqcu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-and-solids-demo/sssssqcu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-and-solids-demo/sssssqcu"/>
      <lastmod>2026-11-01T23:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planes-and-solids-demo/sssssqcu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-and-solids-demo/sssssqcu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-and-solids-demo/sssssqcu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-and-solids-demo/sssssqcu"/>
      <lastmod>2026-11-01T23:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-planes-by-edward-james-kirk/sssssqc5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-planes-by-edward-james-kirk/sssssqc5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-planes-by-edward-james-kirk/sssssqc5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-planes-by-edward-james-kirk/sssssqc5"/>
      <lastmod>2026-11-02T18:52:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-planes-by-edward-james-kirk/sssssqc5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-planes-by-edward-james-kirk/sssssqc5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-planes-by-edward-james-kirk/sssssqc5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-planes-by-edward-james-kirk/sssssqc5"/>
      <lastmod>2026-11-02T18:52:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-fractions-with-same-denominator/sssssqcb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions-with-same-denominator/sssssqcb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions-with-same-denominator/sssssqcb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions-with-same-denominator/sssssqcb"/>
      <lastmod>2026-11-02T17:02:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-fractions-with-same-denominator/sssssqcb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions-with-same-denominator/sssssqcb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions-with-same-denominator/sssssqcb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions-with-same-denominator/sssssqcb"/>
      <lastmod>2026-11-02T17:02:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/significant-figures-self-directed-quiz/sssssqc3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/significant-figures-self-directed-quiz/sssssqc3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/significant-figures-self-directed-quiz/sssssqc3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/significant-figures-self-directed-quiz/sssssqc3"/>
      <lastmod>2026-11-02T06:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/significant-figures-self-directed-quiz/sssssqc3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/significant-figures-self-directed-quiz/sssssqc3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/significant-figures-self-directed-quiz/sssssqc3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/significant-figures-self-directed-quiz/sssssqc3"/>
      <lastmod>2026-11-02T06:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-intersected-by-plane-forming-a-parabola/sssssqcq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-intersected-by-plane-forming-a-parabola/sssssqcq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-intersected-by-plane-forming-a-parabola/sssssqcq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-intersected-by-plane-forming-a-parabola/sssssqcq"/>
      <lastmod>2026-11-01T21:14:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-intersected-by-plane-forming-a-parabola/sssssqcq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-intersected-by-plane-forming-a-parabola/sssssqcq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-intersected-by-plane-forming-a-parabola/sssssqcq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-intersected-by-plane-forming-a-parabola/sssssqcq"/>
      <lastmod>2026-11-01T21:14:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/continuous-probability-density-function-demo/sssssqc1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuous-probability-density-function-demo/sssssqc1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuous-probability-density-function-demo/sssssqc1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuous-probability-density-function-demo/sssssqc1"/>
      <lastmod>2026-11-02T17:06:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/continuous-probability-density-function-demo/sssssqc1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuous-probability-density-function-demo/sssssqc1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuous-probability-density-function-demo/sssssqc1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuous-probability-density-function-demo/sssssqc1"/>
      <lastmod>2026-11-02T17:06:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-area-workbench/sssssqcm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-workbench/sssssqcm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-workbench/sssssqcm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-workbench/sssssqcm"/>
      <lastmod>2026-11-01T23:35:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-area-workbench/sssssqcm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-workbench/sssssqcm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-workbench/sssssqcm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-workbench/sssssqcm"/>
      <lastmod>2026-11-01T23:35:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-by-antalcides-olivo/sssssqcj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-by-antalcides-olivo/sssssqcj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions-by-antalcides-olivo/sssssqcj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-by-antalcides-olivo/sssssqcj"/>
      <lastmod>2026-11-02T00:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions-by-antalcides-olivo/sssssqcj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-by-antalcides-olivo/sssssqcj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions-by-antalcides-olivo/sssssqcj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-by-antalcides-olivo/sssssqcj"/>
      <lastmod>2026-11-02T00:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sequence-limit-definition/sssssqcp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-limit-definition/sssssqcp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-limit-definition/sssssqcp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-limit-definition/sssssqcp"/>
      <lastmod>2026-11-02T03:18:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sequence-limit-definition/sssssqcp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-limit-definition/sssssqcp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-limit-definition/sssssqcp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-limit-definition/sssssqcp"/>
      <lastmod>2026-11-02T03:18:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-with-normal-curve/sssssqcw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-with-normal-curve/sssssqcw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-with-normal-curve/sssssqcw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-with-normal-curve/sssssqcw"/>
      <lastmod>2026-11-02T12:29:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-with-normal-curve/sssssqcw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-with-normal-curve/sssssqcw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-with-normal-curve/sssssqcw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-with-normal-curve/sssssqcw"/>
      <lastmod>2026-11-02T12:29:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/galaxy-spiral-model/sssssqc6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/galaxy-spiral-model/sssssqc6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/galaxy-spiral-model/sssssqc6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/galaxy-spiral-model/sssssqc6"/>
      <lastmod>2026-11-02T14:53:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/galaxy-spiral-model/sssssqc6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/galaxy-spiral-model/sssssqc6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/galaxy-spiral-model/sssssqc6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/galaxy-spiral-model/sssssqc6"/>
      <lastmod>2026-11-02T14:53:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/glide-reflection-transformation-diagram/sssssqcg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/glide-reflection-transformation-diagram/sssssqcg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/glide-reflection-transformation-diagram/sssssqcg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/glide-reflection-transformation-diagram/sssssqcg"/>
      <lastmod>2026-11-02T18:31:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/glide-reflection-transformation-diagram/sssssqcg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/glide-reflection-transformation-diagram/sssssqcg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/glide-reflection-transformation-diagram/sssssqcg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/glide-reflection-transformation-diagram/sssssqcg"/>
      <lastmod>2026-11-02T18:31:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-properties-exploration-by-grace-piol/sssssqc9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-properties-exploration-by-grace-piol/sssssqc9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-properties-exploration-by-grace-piol/sssssqc9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-properties-exploration-by-grace-piol/sssssqc9"/>
      <lastmod>2026-11-02T00:36:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-properties-exploration-by-grace-piol/sssssqc9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-properties-exploration-by-grace-piol/sssssqc9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-properties-exploration-by-grace-piol/sssssqc9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-properties-exploration-by-grace-piol/sssssqc9"/>
      <lastmod>2026-11-02T00:36:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-tracer-by-erwin-z-iga-torillo/sssssqce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-tracer-by-erwin-z-iga-torillo/sssssqce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-tracer-by-erwin-z-iga-torillo/sssssqce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-tracer-by-erwin-z-iga-torillo/sssssqce"/>
      <lastmod>2026-11-02T00:46:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-tracer-by-erwin-z-iga-torillo/sssssqce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-tracer-by-erwin-z-iga-torillo/sssssqce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-tracer-by-erwin-z-iga-torillo/sssssqce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-tracer-by-erwin-z-iga-torillo/sssssqce"/>
      <lastmod>2026-11-02T00:46:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-distances-to-foci-is-constant-ellipse-locus-demo/sssssqcv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-distances-to-foci-is-constant-ellipse-locus-demo/sssssqcv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-distances-to-foci-is-constant-ellipse-locus-demo/sssssqcv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-distances-to-foci-is-constant-ellipse-locus-demo/sssssqcv"/>
      <lastmod>2026-11-02T02:15:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-distances-to-foci-is-constant-ellipse-locus-demo/sssssqcv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-distances-to-foci-is-constant-ellipse-locus-demo/sssssqcv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-distances-to-foci-is-constant-ellipse-locus-demo/sssssqcv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-distances-to-foci-is-constant-ellipse-locus-demo/sssssqcv"/>
      <lastmod>2026-11-02T02:15:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/day-6-dilation-by-scott-galson/sssssqc4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/day-6-dilation-by-scott-galson/sssssqc4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/day-6-dilation-by-scott-galson/sssssqc4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/day-6-dilation-by-scott-galson/sssssqc4"/>
      <lastmod>2026-11-02T17:16:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/day-6-dilation-by-scott-galson/sssssqc4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/day-6-dilation-by-scott-galson/sssssqc4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/day-6-dilation-by-scott-galson/sssssqc4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/day-6-dilation-by-scott-galson/sssssqc4"/>
      <lastmod>2026-11-02T17:16:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directed-numbers-addition-practice/sssssqcl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directed-numbers-addition-practice/sssssqcl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directed-numbers-addition-practice/sssssqcl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directed-numbers-addition-practice/sssssqcl"/>
      <lastmod>2026-11-01T19:21:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directed-numbers-addition-practice/sssssqcl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directed-numbers-addition-practice/sssssqcl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directed-numbers-addition-practice/sssssqcl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directed-numbers-addition-practice/sssssqcl"/>
      <lastmod>2026-11-01T19:21:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-angles-and-linear-pairs/sssssqcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-angles-and-linear-pairs/sssssqcy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-angles-and-linear-pairs/sssssqcy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-angles-and-linear-pairs/sssssqcy"/>
      <lastmod>2026-11-02T16:59:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-angles-and-linear-pairs/sssssqcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-angles-and-linear-pairs/sssssqcy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-angles-and-linear-pairs/sssssqcy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-angles-and-linear-pairs/sssssqcy"/>
      <lastmod>2026-11-02T16:59:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-sin-cos-tan-from-unit-circle/sssssqca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-sin-cos-tan-from-unit-circle/sssssqca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-sin-cos-tan-from-unit-circle/sssssqca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-sin-cos-tan-from-unit-circle/sssssqca"/>
      <lastmod>2026-11-02T15:30:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-sin-cos-tan-from-unit-circle/sssssqca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-sin-cos-tan-from-unit-circle/sssssqca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-sin-cos-tan-from-unit-circle/sssssqca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-sin-cos-tan-from-unit-circle/sssssqca"/>
      <lastmod>2026-11-02T15:30:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtraction-as-a-function-demo/sssssqcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-as-a-function-demo/sssssqcc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-as-a-function-demo/sssssqcc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-as-a-function-demo/sssssqcc"/>
      <lastmod>2026-11-01T19:31:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtraction-as-a-function-demo/sssssqcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-as-a-function-demo/sssssqcc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-as-a-function-demo/sssssqcc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-as-a-function-demo/sssssqcc"/>
      <lastmod>2026-11-01T19:31:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-length-problem/sssssqcr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-length-problem/sssssqcr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-length-problem/sssssqcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-length-problem/sssssqcr"/>
      <lastmod>2026-11-02T18:39:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-length-problem/sssssqcr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-length-problem/sssssqcr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-length-problem/sssssqcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-length-problem/sssssqcr"/>
      <lastmod>2026-11-02T18:39:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/protractor-angle-measurement/sssssqch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/protractor-angle-measurement/sssssqch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/protractor-angle-measurement/sssssqch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/protractor-angle-measurement/sssssqch"/>
      <lastmod>2026-11-02T12:22:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/protractor-angle-measurement/sssssqch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/protractor-angle-measurement/sssssqch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/protractor-angle-measurement/sssssqch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/protractor-angle-measurement/sssssqch"/>
      <lastmod>2026-11-02T12:22:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/girih-tiles-construction-and-symmetry-of-islamic-geometric-patterns/sssssqct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/girih-tiles-construction-and-symmetry-of-islamic-geometric-patterns/sssssqct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/girih-tiles-construction-and-symmetry-of-islamic-geometric-patterns/sssssqct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/girih-tiles-construction-and-symmetry-of-islamic-geometric-patterns/sssssqct"/>
      <lastmod>2026-11-02T02:37:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/girih-tiles-construction-and-symmetry-of-islamic-geometric-patterns/sssssqct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/girih-tiles-construction-and-symmetry-of-islamic-geometric-patterns/sssssqct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/girih-tiles-construction-and-symmetry-of-islamic-geometric-patterns/sssssqct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/girih-tiles-construction-and-symmetry-of-islamic-geometric-patterns/sssssqct"/>
      <lastmod>2026-11-02T02:37:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumcircle-of-a-triangle/sssssqcx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcircle-of-a-triangle/sssssqcx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcircle-of-a-triangle/sssssqcx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcircle-of-a-triangle/sssssqcx"/>
      <lastmod>2026-11-01T21:25:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumcircle-of-a-triangle/sssssqcx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcircle-of-a-triangle/sssssqcx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcircle-of-a-triangle/sssssqcx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcircle-of-a-triangle/sssssqcx"/>
      <lastmod>2026-11-01T21:25:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-laws-integer-exponents/sssssqci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-laws-integer-exponents/sssssqci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-laws-integer-exponents/sssssqci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-laws-integer-exponents/sssssqci"/>
      <lastmod>2026-11-02T18:10:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-laws-integer-exponents/sssssqci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-laws-integer-exponents/sssssqci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-laws-integer-exponents/sssssqci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-laws-integer-exponents/sssssqci"/>
      <lastmod>2026-11-02T18:10:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-example-button-point-and-object-interaction/sssssqco</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-button-point-and-object-interaction/sssssqco"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-button-point-and-object-interaction/sssssqco"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-button-point-and-object-interaction/sssssqco"/>
      <lastmod>2026-11-01T19:08:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-example-button-point-and-object-interaction/sssssqco</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-button-point-and-object-interaction/sssssqco"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-button-point-and-object-interaction/sssssqco"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-button-point-and-object-interaction/sssssqco"/>
      <lastmod>2026-11-01T19:08:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagons-or-cube/sssssqrs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagons-or-cube/sssssqrs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagons-or-cube/sssssqrs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagons-or-cube/sssssqrs"/>
      <lastmod>2026-11-01T23:38:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagons-or-cube/sssssqrs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagons-or-cube/sssssqrs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagons-or-cube/sssssqrs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagons-or-cube/sssssqrs"/>
      <lastmod>2026-11-01T23:38:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-degree-input-box/sssssqr7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-degree-input-box/sssssqr7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-degree-input-box/sssssqr7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-degree-input-box/sssssqr7"/>
      <lastmod>2026-11-02T14:55:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-degree-input-box/sssssqr7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-degree-input-box/sssssqr7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-degree-input-box/sssssqr7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-degree-input-box/sssssqr7"/>
      <lastmod>2026-11-02T14:55:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-and-unit-circle/sssssqrn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-and-unit-circle/sssssqrn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-and-unit-circle/sssssqrn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-and-unit-circle/sssssqrn"/>
      <lastmod>2026-11-01T21:17:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-and-unit-circle/sssssqrn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-and-unit-circle/sssssqrn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-and-unit-circle/sssssqrn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-and-unit-circle/sssssqrn"/>
      <lastmod>2026-11-01T21:17:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/new-pythagorean-theorem-for-non-similar-triangles/sssssqr2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-pythagorean-theorem-for-non-similar-triangles/sssssqr2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-pythagorean-theorem-for-non-similar-triangles/sssssqr2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-pythagorean-theorem-for-non-similar-triangles/sssssqr2"/>
      <lastmod>2026-11-01T23:18:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/new-pythagorean-theorem-for-non-similar-triangles/sssssqr2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-pythagorean-theorem-for-non-similar-triangles/sssssqr2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-pythagorean-theorem-for-non-similar-triangles/sssssqr2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-pythagorean-theorem-for-non-similar-triangles/sssssqr2"/>
      <lastmod>2026-11-01T23:18:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-proof-of-pythagorean-theorem/sssssqrk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-proof-of-pythagorean-theorem/sssssqrk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-proof-of-pythagorean-theorem/sssssqrk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-proof-of-pythagorean-theorem/sssssqrk"/>
      <lastmod>2026-11-01T21:18:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-proof-of-pythagorean-theorem/sssssqrk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-proof-of-pythagorean-theorem/sssssqrk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-proof-of-pythagorean-theorem/sssssqrk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-proof-of-pythagorean-theorem/sssssqrk"/>
      <lastmod>2026-11-01T21:18:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/star-design/sssssqrz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/star-design/sssssqrz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/star-design/sssssqrz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/star-design/sssssqrz"/>
      <lastmod>2026-11-02T17:07:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/star-design/sssssqrz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/star-design/sssssqrz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/star-design/sssssqrz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/star-design/sssssqrz"/>
      <lastmod>2026-11-02T17:07:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-mr-mundey/sssssqr0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-mr-mundey/sssssqr0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-transformation-demo-by-mr-mundey/sssssqr0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-mr-mundey/sssssqr0"/>
      <lastmod>2026-11-02T12:09:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-transformation-demo-by-mr-mundey/sssssqr0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-mr-mundey/sssssqr0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-transformation-demo-by-mr-mundey/sssssqr0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-mr-mundey/sssssqr0"/>
      <lastmod>2026-11-02T12:09:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/6x10-pool-table/sssssqrd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/6x10-pool-table/sssssqrd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/6x10-pool-table/sssssqrd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/6x10-pool-table/sssssqrd"/>
      <lastmod>2026-11-02T17:07:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/6x10-pool-table/sssssqrd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/6x10-pool-table/sssssqrd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/6x10-pool-table/sssssqrd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/6x10-pool-table/sssssqrd"/>
      <lastmod>2026-11-02T17:07:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/notice-these-points/sssssqrf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/notice-these-points/sssssqrf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/notice-these-points/sssssqrf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/notice-these-points/sssssqrf"/>
      <lastmod>2026-11-01T21:19:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/notice-these-points/sssssqrf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/notice-these-points/sssssqrf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/notice-these-points/sssssqrf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/notice-these-points/sssssqrf"/>
      <lastmod>2026-11-01T21:19:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-calculus-surfaces-surface-limits/sssssqr8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-calculus-surfaces-surface-limits/sssssqr8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-calculus-surfaces-surface-limits/sssssqr8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-calculus-surfaces-surface-limits/sssssqr8"/>
      <lastmod>2026-11-02T12:44:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-calculus-surfaces-surface-limits/sssssqr8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-calculus-surfaces-surface-limits/sssssqr8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-calculus-surfaces-surface-limits/sssssqr8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-calculus-surfaces-surface-limits/sssssqr8"/>
      <lastmod>2026-11-02T12:44:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-net-demonstration/sssssqru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-net-demonstration/sssssqru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-net-demonstration/sssssqru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-net-demonstration/sssssqru"/>
      <lastmod>2026-11-02T16:48:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-net-demonstration/sssssqru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-net-demonstration/sssssqru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-net-demonstration/sssssqru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-net-demonstration/sssssqru"/>
      <lastmod>2026-11-02T16:48:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/clock-model/sssssqr5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clock-model/sssssqr5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clock-model/sssssqr5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clock-model/sssssqr5"/>
      <lastmod>2026-11-02T08:34:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/clock-model/sssssqr5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clock-model/sssssqr5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clock-model/sssssqr5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clock-model/sssssqr5"/>
      <lastmod>2026-11-02T08:34:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mixed-coordinate-system-demo/sssssqrb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixed-coordinate-system-demo/sssssqrb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixed-coordinate-system-demo/sssssqrb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixed-coordinate-system-demo/sssssqrb"/>
      <lastmod>2026-11-02T15:33:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mixed-coordinate-system-demo/sssssqrb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixed-coordinate-system-demo/sssssqrb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixed-coordinate-system-demo/sssssqrb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixed-coordinate-system-demo/sssssqrb"/>
      <lastmod>2026-11-02T15:33:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-sphere-and-prism/sssssqr3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-sphere-and-prism/sssssqr3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-sphere-and-prism/sssssqr3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-sphere-and-prism/sssssqr3"/>
      <lastmod>2026-11-02T17:52:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-sphere-and-prism/sssssqr3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-sphere-and-prism/sssssqr3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-sphere-and-prism/sssssqr3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-sphere-and-prism/sssssqr3"/>
      <lastmod>2026-11-02T17:52:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/qr4-01-p2a-cyu1-translations/sssssqrq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/qr4-01-p2a-cyu1-translations/sssssqrq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/qr4-01-p2a-cyu1-translations/sssssqrq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/qr4-01-p2a-cyu1-translations/sssssqrq"/>
      <lastmod>2026-11-02T00:02:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/qr4-01-p2a-cyu1-translations/sssssqrq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/qr4-01-p2a-cyu1-translations/sssssqrq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/qr4-01-p2a-cyu1-translations/sssssqrq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/qr4-01-p2a-cyu1-translations/sssssqrq"/>
      <lastmod>2026-11-02T00:02:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-2x2-systems-of-equations/sssssqr1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-2x2-systems-of-equations/sssssqr1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-2x2-systems-of-equations/sssssqr1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-2x2-systems-of-equations/sssssqr1"/>
      <lastmod>2026-11-01T23:13:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-2x2-systems-of-equations/sssssqr1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-2x2-systems-of-equations/sssssqr1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-2x2-systems-of-equations/sssssqr1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-2x2-systems-of-equations/sssssqr1"/>
      <lastmod>2026-11-01T23:13:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/world-series-winning-probability/sssssqrm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/world-series-winning-probability/sssssqrm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/world-series-winning-probability/sssssqrm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/world-series-winning-probability/sssssqrm"/>
      <lastmod>2026-11-02T00:16:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/world-series-winning-probability/sssssqrm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/world-series-winning-probability/sssssqrm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/world-series-winning-probability/sssssqrm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/world-series-winning-probability/sssssqrm"/>
      <lastmod>2026-11-02T00:16:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equation-solver/sssssqrj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-solver/sssssqrj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-solver/sssssqrj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-solver/sssssqrj"/>
      <lastmod>2026-11-01T21:49:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equation-solver/sssssqrj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-solver/sssssqrj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-solver/sssssqrj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-solver/sssssqrj"/>
      <lastmod>2026-11-01T21:49:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rounding-numbers-demo/sssssqrp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rounding-numbers-demo/sssssqrp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rounding-numbers-demo/sssssqrp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rounding-numbers-demo/sssssqrp"/>
      <lastmod>2026-11-02T18:24:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rounding-numbers-demo/sssssqrp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rounding-numbers-demo/sssssqrp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rounding-numbers-demo/sssssqrp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rounding-numbers-demo/sssssqrp"/>
      <lastmod>2026-11-02T18:24:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-with-diagonals/sssssqrw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-with-diagonals/sssssqrw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-with-diagonals/sssssqrw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-with-diagonals/sssssqrw"/>
      <lastmod>2026-11-02T00:05:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-with-diagonals/sssssqrw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-with-diagonals/sssssqrw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-with-diagonals/sssssqrw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-with-diagonals/sssssqrw"/>
      <lastmod>2026-11-02T00:05:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-area-basics-recap/sssssqr6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-area-basics-recap/sssssqr6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-area-basics-recap/sssssqr6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-area-basics-recap/sssssqr6"/>
      <lastmod>2026-11-01T23:59:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-area-basics-recap/sssssqr6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-area-basics-recap/sssssqr6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-area-basics-recap/sssssqr6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-area-basics-recap/sssssqr6"/>
      <lastmod>2026-11-01T23:59:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sas-congruence-demonstration-by-bernard-smith/sssssqrg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-congruence-demonstration-by-bernard-smith/sssssqrg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-congruence-demonstration-by-bernard-smith/sssssqrg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-congruence-demonstration-by-bernard-smith/sssssqrg"/>
      <lastmod>2026-11-02T15:31:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sas-congruence-demonstration-by-bernard-smith/sssssqrg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-congruence-demonstration-by-bernard-smith/sssssqrg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-congruence-demonstration-by-bernard-smith/sssssqrg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-congruence-demonstration-by-bernard-smith/sssssqrg"/>
      <lastmod>2026-11-02T15:31:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/frequency-and-relative-frequency-distributions-by-david-gurney/sssssqr9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/frequency-and-relative-frequency-distributions-by-david-gurney/sssssqr9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/frequency-and-relative-frequency-distributions-by-david-gurney/sssssqr9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/frequency-and-relative-frequency-distributions-by-david-gurney/sssssqr9"/>
      <lastmod>2026-11-02T00:32:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/frequency-and-relative-frequency-distributions-by-david-gurney/sssssqr9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/frequency-and-relative-frequency-distributions-by-david-gurney/sssssqr9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/frequency-and-relative-frequency-distributions-by-david-gurney/sssssqr9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/frequency-and-relative-frequency-distributions-by-david-gurney/sssssqr9"/>
      <lastmod>2026-11-02T00:32:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-138-a-comprehensive-demonstration-of-geometric-objects-and-transforma/sssssqre</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-138-a-comprehensive-demonstration-of-geometric-objects-and-transforma/sssssqre"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-138-a-comprehensive-demonstration-of-geometric-objects-and-transforma/sssssqre"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-138-a-comprehensive-demonstration-of-geometric-objects-and-transforma/sssssqre"/>
      <lastmod>2026-11-02T15:54:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-138-a-comprehensive-demonstration-of-geometric-objects-and-transforma/sssssqre</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-138-a-comprehensive-demonstration-of-geometric-objects-and-transforma/sssssqre"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-138-a-comprehensive-demonstration-of-geometric-objects-and-transforma/sssssqre"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-138-a-comprehensive-demonstration-of-geometric-objects-and-transforma/sssssqre"/>
      <lastmod>2026-11-02T15:54:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-rectangular-prism/sssssqrv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism/sssssqrv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rectangular-prism/sssssqrv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism/sssssqrv"/>
      <lastmod>2026-11-02T11:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-rectangular-prism/sssssqrv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism/sssssqrv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rectangular-prism/sssssqrv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prism/sssssqrv"/>
      <lastmod>2026-11-02T11:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculus-definite-integral-example-1/sssssqr4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculus-definite-integral-example-1/sssssqr4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculus-definite-integral-example-1/sssssqr4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculus-definite-integral-example-1/sssssqr4"/>
      <lastmod>2026-11-02T17:54:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculus-definite-integral-example-1/sssssqr4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculus-definite-integral-example-1/sssssqr4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculus-definite-integral-example-1/sssssqr4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculus-definite-integral-example-1/sssssqr4"/>
      <lastmod>2026-11-02T17:54:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-equations/sssssqrl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-equations/sssssqrl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-equations/sssssqrl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-equations/sssssqrl"/>
      <lastmod>2026-11-02T18:12:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-equations/sssssqrl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-equations/sssssqrl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-equations/sssssqrl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-equations/sssssqrl"/>
      <lastmod>2026-11-02T18:12:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/campbell-s-test-maximizing-volume/sssssqry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/campbell-s-test-maximizing-volume/sssssqry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/campbell-s-test-maximizing-volume/sssssqry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/campbell-s-test-maximizing-volume/sssssqry"/>
      <lastmod>2026-11-02T09:34:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/campbell-s-test-maximizing-volume/sssssqry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/campbell-s-test-maximizing-volume/sssssqry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/campbell-s-test-maximizing-volume/sssssqry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/campbell-s-test-maximizing-volume/sssssqry"/>
      <lastmod>2026-11-02T09:34:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-locus-geometric-construction-of-focus-and-directrix/sssssqra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-locus-geometric-construction-of-focus-and-directrix/sssssqra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-locus-geometric-construction-of-focus-and-directrix/sssssqra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-locus-geometric-construction-of-focus-and-directrix/sssssqra"/>
      <lastmod>2026-11-01T19:31:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-locus-geometric-construction-of-focus-and-directrix/sssssqra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-locus-geometric-construction-of-focus-and-directrix/sssssqra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-locus-geometric-construction-of-focus-and-directrix/sssssqra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-locus-geometric-construction-of-focus-and-directrix/sssssqra"/>
      <lastmod>2026-11-01T19:31:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/strange-functions-demonstration/sssssqrc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/strange-functions-demonstration/sssssqrc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/strange-functions-demonstration/sssssqrc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/strange-functions-demonstration/sssssqrc"/>
      <lastmod>2026-11-02T10:40:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/strange-functions-demonstration/sssssqrc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/strange-functions-demonstration/sssssqrc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/strange-functions-demonstration/sssssqrc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/strange-functions-demonstration/sssssqrc"/>
      <lastmod>2026-11-02T10:40:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-3d-beginner-exercise-1/sssssqrr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-3d-beginner-exercise-1/sssssqrr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-3d-beginner-exercise-1/sssssqrr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-3d-beginner-exercise-1/sssssqrr"/>
      <lastmod>2026-11-01T21:59:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-3d-beginner-exercise-1/sssssqrr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-3d-beginner-exercise-1/sssssqrr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-3d-beginner-exercise-1/sssssqrr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-3d-beginner-exercise-1/sssssqrr"/>
      <lastmod>2026-11-01T21:59:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hole-5-math-example/sssssqrh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-5-math-example/sssssqrh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hole-5-math-example/sssssqrh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hole-5-math-example/sssssqrh"/>
      <lastmod>2026-11-02T09:09:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hole-5-math-example/sssssqrh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-5-math-example/sssssqrh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hole-5-math-example/sssssqrh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hole-5-math-example/sssssqrh"/>
      <lastmod>2026-11-02T09:09:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-similar-transformations-by-lauren-garrott/sssssqrt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-similar-transformations-by-lauren-garrott/sssssqrt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-similar-transformations-by-lauren-garrott/sssssqrt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-similar-transformations-by-lauren-garrott/sssssqrt"/>
      <lastmod>2026-11-01T23:16:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-similar-transformations-by-lauren-garrott/sssssqrt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-similar-transformations-by-lauren-garrott/sssssqrt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-similar-transformations-by-lauren-garrott/sssssqrt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-similar-transformations-by-lauren-garrott/sssssqrt"/>
      <lastmod>2026-11-01T23:16:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/points-on-vertical-or-horizontal-line-segments/sssssqrx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-on-vertical-or-horizontal-line-segments/sssssqrx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-on-vertical-or-horizontal-line-segments/sssssqrx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-on-vertical-or-horizontal-line-segments/sssssqrx"/>
      <lastmod>2026-11-02T17:16:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/points-on-vertical-or-horizontal-line-segments/sssssqrx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-on-vertical-or-horizontal-line-segments/sssssqrx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-on-vertical-or-horizontal-line-segments/sssssqrx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-on-vertical-or-horizontal-line-segments/sssssqrx"/>
      <lastmod>2026-11-02T17:16:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rational-numbers-on-a-numberline/sssssqri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-numbers-on-a-numberline/sssssqri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-numbers-on-a-numberline/sssssqri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-numbers-on-a-numberline/sssssqri"/>
      <lastmod>2026-11-02T18:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rational-numbers-on-a-numberline/sssssqri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-numbers-on-a-numberline/sssssqri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-numbers-on-a-numberline/sssssqri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-numbers-on-a-numberline/sssssqri"/>
      <lastmod>2026-11-02T18:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-two-planes-by-albert-wong/sssssqro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-albert-wong/sssssqro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-by-albert-wong/sssssqro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-albert-wong/sssssqro"/>
      <lastmod>2026-11-02T16:41:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-two-planes-by-albert-wong/sssssqro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-albert-wong/sssssqro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-by-albert-wong/sssssqro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-albert-wong/sssssqro"/>
      <lastmod>2026-11-02T16:41:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-section-and-wet-surface-ratio/sssssqhs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-section-and-wet-surface-ratio/sssssqhs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-section-and-wet-surface-ratio/sssssqhs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-section-and-wet-surface-ratio/sssssqhs"/>
      <lastmod>2026-11-02T08:44:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-section-and-wet-surface-ratio/sssssqhs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-section-and-wet-surface-ratio/sssssqhs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-section-and-wet-surface-ratio/sssssqhs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-section-and-wet-surface-ratio/sssssqhs"/>
      <lastmod>2026-11-02T08:44:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/julia-set-complex-number-demonstration/sssssqh7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/julia-set-complex-number-demonstration/sssssqh7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/julia-set-complex-number-demonstration/sssssqh7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/julia-set-complex-number-demonstration/sssssqh7"/>
      <lastmod>2026-11-01T21:10:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/julia-set-complex-number-demonstration/sssssqh7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/julia-set-complex-number-demonstration/sssssqh7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/julia-set-complex-number-demonstration/sssssqh7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/julia-set-complex-number-demonstration/sssssqh7"/>
      <lastmod>2026-11-01T21:10:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/year-3-parabola-exercise/sssssqhn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/year-3-parabola-exercise/sssssqhn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/year-3-parabola-exercise/sssssqhn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/year-3-parabola-exercise/sssssqhn"/>
      <lastmod>2026-11-02T09:58:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/year-3-parabola-exercise/sssssqhn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/year-3-parabola-exercise/sssssqhn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/year-3-parabola-exercise/sssssqhn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/year-3-parabola-exercise/sssssqhn"/>
      <lastmod>2026-11-02T09:58:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-a-t-rex-with-fourier-transform/sssssqh2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-a-t-rex-with-fourier-transform/sssssqh2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-a-t-rex-with-fourier-transform/sssssqh2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-a-t-rex-with-fourier-transform/sssssqh2"/>
      <lastmod>2026-11-02T09:34:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-a-t-rex-with-fourier-transform/sssssqh2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-a-t-rex-with-fourier-transform/sssssqh2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-a-t-rex-with-fourier-transform/sssssqh2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-a-t-rex-with-fourier-transform/sssssqh2"/>
      <lastmod>2026-11-02T09:34:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-addition-postulate-demo/sssssqhk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-demo/sssssqhk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-demo/sssssqhk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-demo/sssssqhk"/>
      <lastmod>2026-11-02T16:34:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/segment-addition-postulate-demo/sssssqhk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-demo/sssssqhk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-demo/sssssqhk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-demo/sssssqhk"/>
      <lastmod>2026-11-02T16:34:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruent-line-segments/sssssqhz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-line-segments/sssssqhz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-line-segments/sssssqhz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-line-segments/sssssqhz"/>
      <lastmod>2026-11-02T09:06:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruent-line-segments/sssssqhz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-line-segments/sssssqhz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-line-segments/sssssqhz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-line-segments/sssssqhz"/>
      <lastmod>2026-11-02T09:06:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-division-demonstration/sssssqh0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-division-demonstration/sssssqh0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-division-demonstration/sssssqh0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-division-demonstration/sssssqh0"/>
      <lastmod>2026-11-01T23:16:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-division-demonstration/sssssqh0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-division-demonstration/sssssqh0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-division-demonstration/sssssqh0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-division-demonstration/sssssqh0"/>
      <lastmod>2026-11-01T23:16:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution/sssssqhd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution/sssssqhd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solid-of-revolution/sssssqhd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution/sssssqhd"/>
      <lastmod>2026-11-01T23:54:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-solid-of-revolution/sssssqhd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution/sssssqhd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solid-of-revolution/sssssqhd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution/sssssqhd"/>
      <lastmod>2026-11-01T23:54:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-angle-sum-calculation/sssssqhf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-angle-sum-calculation/sssssqhf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-angle-sum-calculation/sssssqhf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-angle-sum-calculation/sssssqhf"/>
      <lastmod>2026-11-02T10:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-angle-sum-calculation/sssssqhf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-angle-sum-calculation/sssssqhf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-angle-sum-calculation/sssssqhf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-angle-sum-calculation/sssssqhf"/>
      <lastmod>2026-11-02T10:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-section-demonstration/sssssqh8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-section-demonstration/sssssqh8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-section-demonstration/sssssqh8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-section-demonstration/sssssqh8"/>
      <lastmod>2026-11-01T21:50:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-section-demonstration/sssssqh8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-section-demonstration/sssssqh8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-section-demonstration/sssssqh8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-section-demonstration/sssssqh8"/>
      <lastmod>2026-11-01T21:50:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/absolute-value-inequalities-conjunctions-disjunctions-quiz-generator/sssssqhu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/absolute-value-inequalities-conjunctions-disjunctions-quiz-generator/sssssqhu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/absolute-value-inequalities-conjunctions-disjunctions-quiz-generator/sssssqhu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/absolute-value-inequalities-conjunctions-disjunctions-quiz-generator/sssssqhu"/>
      <lastmod>2026-11-02T17:18:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/absolute-value-inequalities-conjunctions-disjunctions-quiz-generator/sssssqhu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/absolute-value-inequalities-conjunctions-disjunctions-quiz-generator/sssssqhu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/absolute-value-inequalities-conjunctions-disjunctions-quiz-generator/sssssqhu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/absolute-value-inequalities-conjunctions-disjunctions-quiz-generator/sssssqhu"/>
      <lastmod>2026-11-02T17:18:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-variable-regression-analysis/sssssqh5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-variable-regression-analysis/sssssqh5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-variable-regression-analysis/sssssqh5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-variable-regression-analysis/sssssqh5"/>
      <lastmod>2026-11-01T22:00:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-variable-regression-analysis/sssssqh5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-variable-regression-analysis/sssssqh5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-variable-regression-analysis/sssssqh5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-variable-regression-analysis/sssssqh5"/>
      <lastmod>2026-11-01T22:00:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/monte-carlo-pi-approximation/sssssqhb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/monte-carlo-pi-approximation/sssssqhb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/monte-carlo-pi-approximation/sssssqhb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/monte-carlo-pi-approximation/sssssqhb"/>
      <lastmod>2026-11-01T23:48:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/monte-carlo-pi-approximation/sssssqhb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/monte-carlo-pi-approximation/sssssqhb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/monte-carlo-pi-approximation/sssssqhb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/monte-carlo-pi-approximation/sssssqhb"/>
      <lastmod>2026-11-01T23:48:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/check-areas-and-perimeters-of-right-triangles/sssssqh3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-areas-and-perimeters-of-right-triangles/sssssqh3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-areas-and-perimeters-of-right-triangles/sssssqh3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-areas-and-perimeters-of-right-triangles/sssssqh3"/>
      <lastmod>2026-11-02T09:47:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/check-areas-and-perimeters-of-right-triangles/sssssqh3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-areas-and-perimeters-of-right-triangles/sssssqh3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-areas-and-perimeters-of-right-triangles/sssssqh3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-areas-and-perimeters-of-right-triangles/sssssqh3"/>
      <lastmod>2026-11-02T09:47:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trig-graph-transformation-demo/sssssqhq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-graph-transformation-demo/sssssqhq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-graph-transformation-demo/sssssqhq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-graph-transformation-demo/sssssqhq"/>
      <lastmod>2026-11-02T18:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trig-graph-transformation-demo/sssssqhq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-graph-transformation-demo/sssssqhq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-graph-transformation-demo/sssssqhq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-graph-transformation-demo/sssssqhq"/>
      <lastmod>2026-11-02T18:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/semicircles-in-rectangle/sssssqh1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/semicircles-in-rectangle/sssssqh1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/semicircles-in-rectangle/sssssqh1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/semicircles-in-rectangle/sssssqh1"/>
      <lastmod>2026-11-02T18:50:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/semicircles-in-rectangle/sssssqh1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/semicircles-in-rectangle/sssssqh1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/semicircles-in-rectangle/sssssqh1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/semicircles-in-rectangle/sssssqh1"/>
      <lastmod>2026-11-02T18:50:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eccentricity-and-directrix-of-an-ellipse-by-jonathan-holland/sssssqhm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eccentricity-and-directrix-of-an-ellipse-by-jonathan-holland/sssssqhm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eccentricity-and-directrix-of-an-ellipse-by-jonathan-holland/sssssqhm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eccentricity-and-directrix-of-an-ellipse-by-jonathan-holland/sssssqhm"/>
      <lastmod>2026-11-02T18:35:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eccentricity-and-directrix-of-an-ellipse-by-jonathan-holland/sssssqhm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eccentricity-and-directrix-of-an-ellipse-by-jonathan-holland/sssssqhm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eccentricity-and-directrix-of-an-ellipse-by-jonathan-holland/sssssqhm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eccentricity-and-directrix-of-an-ellipse-by-jonathan-holland/sssssqhm"/>
      <lastmod>2026-11-02T18:35:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-translations-visualizing-parabola-shifts/sssssqhj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-translations-visualizing-parabola-shifts/sssssqhj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-translations-visualizing-parabola-shifts/sssssqhj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-translations-visualizing-parabola-shifts/sssssqhj"/>
      <lastmod>2026-11-02T18:52:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-translations-visualizing-parabola-shifts/sssssqhj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-translations-visualizing-parabola-shifts/sssssqhj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-translations-visualizing-parabola-shifts/sssssqhj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-translations-visualizing-parabola-shifts/sssssqhj"/>
      <lastmod>2026-11-02T18:52:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoids-and-kites-exploration/sssssqhp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoids-and-kites-exploration/sssssqhp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoids-and-kites-exploration/sssssqhp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoids-and-kites-exploration/sssssqhp"/>
      <lastmod>2026-11-01T19:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoids-and-kites-exploration/sssssqhp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoids-and-kites-exploration/sssssqhp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoids-and-kites-exploration/sssssqhp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoids-and-kites-exploration/sssssqhp"/>
      <lastmod>2026-11-01T19:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scaling-rectangles/sssssqhw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scaling-rectangles/sssssqhw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scaling-rectangles/sssssqhw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scaling-rectangles/sssssqhw"/>
      <lastmod>2026-11-02T16:43:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scaling-rectangles/sssssqhw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scaling-rectangles/sssssqhw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scaling-rectangles/sssssqhw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scaling-rectangles/sssssqhw"/>
      <lastmod>2026-11-02T16:43:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-animated/sssssqh6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-animated/sssssqh6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions-animated/sssssqh6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-animated/sssssqh6"/>
      <lastmod>2026-11-02T18:24:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions-animated/sssssqh6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-animated/sssssqh6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions-animated/sssssqh6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions-animated/sssssqh6"/>
      <lastmod>2026-11-02T18:24:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-variable-division-power-graphing/sssssqhg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-variable-division-power-graphing/sssssqhg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-variable-division-power-graphing/sssssqhg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-variable-division-power-graphing/sssssqhg"/>
      <lastmod>2026-11-01T23:58:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-variable-division-power-graphing/sssssqhg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-variable-division-power-graphing/sssssqhg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-variable-division-power-graphing/sssssqhg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-variable-division-power-graphing/sssssqhg"/>
      <lastmod>2026-11-01T23:58:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-cone-and-cylinder/sssssqh9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cone-and-cylinder/sssssqh9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cone-and-cylinder/sssssqh9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cone-and-cylinder/sssssqh9"/>
      <lastmod>2026-11-02T18:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-cone-and-cylinder/sssssqh9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cone-and-cylinder/sssssqh9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cone-and-cylinder/sssssqh9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cone-and-cylinder/sssssqh9"/>
      <lastmod>2026-11-02T18:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-ordered-triples/sssssqhe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-ordered-triples/sssssqhe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-ordered-triples/sssssqhe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-ordered-triples/sssssqhe"/>
      <lastmod>2026-11-02T09:27:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-ordered-triples/sssssqhe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-ordered-triples/sssssqhe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-ordered-triples/sssssqhe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-ordered-triples/sssssqhe"/>
      <lastmod>2026-11-02T09:27:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-a-quadratic/sssssqhv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-a-quadratic/sssssqhv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-roots-of-a-quadratic/sssssqhv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-a-quadratic/sssssqhv"/>
      <lastmod>2026-11-01T20:45:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-complex-roots-of-a-quadratic/sssssqhv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-a-quadratic/sssssqhv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-roots-of-a-quadratic/sssssqhv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-a-quadratic/sssssqhv"/>
      <lastmod>2026-11-01T20:45:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/from-parallelogram-to-arbitrary-quadrilateral/sssssqh4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-parallelogram-to-arbitrary-quadrilateral/sssssqh4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-parallelogram-to-arbitrary-quadrilateral/sssssqh4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-parallelogram-to-arbitrary-quadrilateral/sssssqh4"/>
      <lastmod>2026-11-02T18:54:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/from-parallelogram-to-arbitrary-quadrilateral/sssssqh4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-parallelogram-to-arbitrary-quadrilateral/sssssqh4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-parallelogram-to-arbitrary-quadrilateral/sssssqh4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-parallelogram-to-arbitrary-quadrilateral/sssssqh4"/>
      <lastmod>2026-11-02T18:54:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-h-c-f-by-listing-factors-interactive-geogebra-example/sssssqhl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-h-c-f-by-listing-factors-interactive-geogebra-example/sssssqhl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-h-c-f-by-listing-factors-interactive-geogebra-example/sssssqhl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-h-c-f-by-listing-factors-interactive-geogebra-example/sssssqhl"/>
      <lastmod>2026-11-01T20:59:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-h-c-f-by-listing-factors-interactive-geogebra-example/sssssqhl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-h-c-f-by-listing-factors-interactive-geogebra-example/sssssqhl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-h-c-f-by-listing-factors-interactive-geogebra-example/sssssqhl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-h-c-f-by-listing-factors-interactive-geogebra-example/sssssqhl"/>
      <lastmod>2026-11-01T20:59:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angle-sum-of-a-polygon/sssssqhy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angle-sum-of-a-polygon/sssssqhy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angle-sum-of-a-polygon/sssssqhy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angle-sum-of-a-polygon/sssssqhy"/>
      <lastmod>2026-11-02T15:20:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angle-sum-of-a-polygon/sssssqhy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angle-sum-of-a-polygon/sssssqhy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angle-sum-of-a-polygon/sssssqhy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angle-sum-of-a-polygon/sssssqhy"/>
      <lastmod>2026-11-02T15:20:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/laws-of-logarithms/sssssqha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/laws-of-logarithms/sssssqha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/laws-of-logarithms/sssssqha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/laws-of-logarithms/sssssqha"/>
      <lastmod>2026-11-01T20:48:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/laws-of-logarithms/sssssqha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/laws-of-logarithms/sssssqha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/laws-of-logarithms/sssssqha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/laws-of-logarithms/sssssqha"/>
      <lastmod>2026-11-01T20:48:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-angles-equality/sssssqhc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-angles-equality/sssssqhc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-angles-equality/sssssqhc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-angles-equality/sssssqhc"/>
      <lastmod>2026-11-02T12:24:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-angles-equality/sssssqhc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-angles-equality/sssssqhc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-angles-equality/sssssqhc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-angles-equality/sssssqhc"/>
      <lastmod>2026-11-02T12:24:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transforming-a-leaping-frog/sssssqhr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-a-leaping-frog/sssssqhr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-a-leaping-frog/sssssqhr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-a-leaping-frog/sssssqhr"/>
      <lastmod>2026-11-01T23:38:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transforming-a-leaping-frog/sssssqhr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-a-leaping-frog/sssssqhr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-a-leaping-frog/sssssqhr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-a-leaping-frog/sssssqhr"/>
      <lastmod>2026-11-01T23:38:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-solution-of-linear-systems-quiz/sssssqhh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-solution-of-linear-systems-quiz/sssssqhh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-solution-of-linear-systems-quiz/sssssqhh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-solution-of-linear-systems-quiz/sssssqhh"/>
      <lastmod>2026-11-01T21:19:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-solution-of-linear-systems-quiz/sssssqhh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-solution-of-linear-systems-quiz/sssssqhh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-solution-of-linear-systems-quiz/sssssqhh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-solution-of-linear-systems-quiz/sssssqhh"/>
      <lastmod>2026-11-01T21:19:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-size-calculation/sssssqht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-size-calculation/sssssqht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-size-calculation/sssssqht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-size-calculation/sssssqht"/>
      <lastmod>2026-11-01T19:27:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-size-calculation/sssssqht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-size-calculation/sssssqht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-size-calculation/sssssqht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-size-calculation/sssssqht"/>
      <lastmod>2026-11-01T19:27:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-the-circumference-of-a-circle-by-jaione-abaurrea/sssssqhx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-the-circumference-of-a-circle-by-jaione-abaurrea/sssssqhx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-the-circumference-of-a-circle-by-jaione-abaurrea/sssssqhx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-the-circumference-of-a-circle-by-jaione-abaurrea/sssssqhx"/>
      <lastmod>2026-11-02T18:24:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-the-circumference-of-a-circle-by-jaione-abaurrea/sssssqhx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-the-circumference-of-a-circle-by-jaione-abaurrea/sssssqhx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-the-circumference-of-a-circle-by-jaione-abaurrea/sssssqhx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-the-circumference-of-a-circle-by-jaione-abaurrea/sssssqhx"/>
      <lastmod>2026-11-02T18:24:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/work-power-and-energy/sssssqhi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/work-power-and-energy/sssssqhi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/work-power-and-energy/sssssqhi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/work-power-and-energy/sssssqhi"/>
      <lastmod>2026-11-02T02:14:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/work-power-and-energy/sssssqhi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/work-power-and-energy/sssssqhi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/work-power-and-energy/sssssqhi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/work-power-and-energy/sssssqhi"/>
      <lastmod>2026-11-02T02:14:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-reflection/sssssqho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-reflection/sssssqho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-reflection/sssssqho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-reflection/sssssqho"/>
      <lastmod>2026-11-01T23:52:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-reflection/sssssqho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-reflection/sssssqho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-reflection/sssssqho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-reflection/sssssqho"/>
      <lastmod>2026-11-01T23:52:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-functions-derivative/sssssqts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-derivative/sssssqts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-derivative/sssssqts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-derivative/sssssqts"/>
      <lastmod>2026-11-02T18:37:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-functions-derivative/sssssqts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-derivative/sssssqts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-derivative/sssssqts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-derivative/sssssqts"/>
      <lastmod>2026-11-02T18:37:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-parabola-from-focus-and-directrix/sssssqt7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parabola-from-focus-and-directrix/sssssqt7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parabola-from-focus-and-directrix/sssssqt7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parabola-from-focus-and-directrix/sssssqt7"/>
      <lastmod>2026-11-02T18:04:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-parabola-from-focus-and-directrix/sssssqt7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parabola-from-focus-and-directrix/sssssqt7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parabola-from-focus-and-directrix/sssssqt7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parabola-from-focus-and-directrix/sssssqt7"/>
      <lastmod>2026-11-02T18:04:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-surface-area-dynamic-demonstration/sssssqtn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-dynamic-demonstration/sssssqtn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area-dynamic-demonstration/sssssqtn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-dynamic-demonstration/sssssqtn"/>
      <lastmod>2026-11-02T18:46:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-surface-area-dynamic-demonstration/sssssqtn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-dynamic-demonstration/sssssqtn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area-dynamic-demonstration/sssssqtn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-dynamic-demonstration/sssssqtn"/>
      <lastmod>2026-11-02T18:46:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangles-in-an-ellipse/sssssqt2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangles-in-an-ellipse/sssssqt2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangles-in-an-ellipse/sssssqt2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangles-in-an-ellipse/sssssqt2"/>
      <lastmod>2026-11-02T12:03:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangles-in-an-ellipse/sssssqt2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangles-in-an-ellipse/sssssqt2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangles-in-an-ellipse/sssssqt2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangles-in-an-ellipse/sssssqt2"/>
      <lastmod>2026-11-02T12:03:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-algebraic-fraction-addition-and-subtraction/sssssqtk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-algebraic-fraction-addition-and-subtraction/sssssqtk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-algebraic-fraction-addition-and-subtraction/sssssqtk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-algebraic-fraction-addition-and-subtraction/sssssqtk"/>
      <lastmod>2026-11-02T18:49:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-algebraic-fraction-addition-and-subtraction/sssssqtk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-algebraic-fraction-addition-and-subtraction/sssssqtk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-algebraic-fraction-addition-and-subtraction/sssssqtk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-algebraic-fraction-addition-and-subtraction/sssssqtk"/>
      <lastmod>2026-11-02T18:49:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spheres-shells-circles-annular-rings-area-and-volume-relations/sssssqtz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheres-shells-circles-annular-rings-area-and-volume-relations/sssssqtz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheres-shells-circles-annular-rings-area-and-volume-relations/sssssqtz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheres-shells-circles-annular-rings-area-and-volume-relations/sssssqtz"/>
      <lastmod>2026-11-02T17:39:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spheres-shells-circles-annular-rings-area-and-volume-relations/sssssqtz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheres-shells-circles-annular-rings-area-and-volume-relations/sssssqtz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheres-shells-circles-annular-rings-area-and-volume-relations/sssssqtz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheres-shells-circles-annular-rings-area-and-volume-relations/sssssqtz"/>
      <lastmod>2026-11-02T17:39:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/icosahedron-exploration-template/sssssqt0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedron-exploration-template/sssssqt0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedron-exploration-template/sssssqt0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedron-exploration-template/sssssqt0"/>
      <lastmod>2026-11-01T23:54:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/icosahedron-exploration-template/sssssqt0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedron-exploration-template/sssssqt0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedron-exploration-template/sssssqt0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedron-exploration-template/sssssqt0"/>
      <lastmod>2026-11-01T23:54:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inscribed-regular-polygons/sssssqtd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-regular-polygons/sssssqtd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-regular-polygons/sssssqtd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-regular-polygons/sssssqtd"/>
      <lastmod>2026-11-01T20:55:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inscribed-regular-polygons/sssssqtd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-regular-polygons/sssssqtd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-regular-polygons/sssssqtd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-regular-polygons/sssssqtd"/>
      <lastmod>2026-11-01T20:55:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-derivatives-tangent-planes-and-directional-derivatives-on-a-surface/sssssqtf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivatives-tangent-planes-and-directional-derivatives-on-a-surface/sssssqtf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivatives-tangent-planes-and-directional-derivatives-on-a-surface/sssssqtf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivatives-tangent-planes-and-directional-derivatives-on-a-surface/sssssqtf"/>
      <lastmod>2026-11-01T19:15:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-derivatives-tangent-planes-and-directional-derivatives-on-a-surface/sssssqtf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivatives-tangent-planes-and-directional-derivatives-on-a-surface/sssssqtf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivatives-tangent-planes-and-directional-derivatives-on-a-surface/sssssqtf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivatives-tangent-planes-and-directional-derivatives-on-a-surface/sssssqtf"/>
      <lastmod>2026-11-01T19:15:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/great-circle/sssssqt8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/great-circle/sssssqt8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/great-circle/sssssqt8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/great-circle/sssssqt8"/>
      <lastmod>2026-11-02T17:55:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/great-circle/sssssqt8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/great-circle/sssssqt8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/great-circle/sssssqt8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/great-circle/sssssqt8"/>
      <lastmod>2026-11-02T17:55:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithm-function-example-2-integrated-exploration-with-polygons-and-definite/sssssqtu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithm-function-example-2-integrated-exploration-with-polygons-and-definite/sssssqtu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithm-function-example-2-integrated-exploration-with-polygons-and-definite/sssssqtu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithm-function-example-2-integrated-exploration-with-polygons-and-definite/sssssqtu"/>
      <lastmod>2026-11-02T13:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithm-function-example-2-integrated-exploration-with-polygons-and-definite/sssssqtu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithm-function-example-2-integrated-exploration-with-polygons-and-definite/sssssqtu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithm-function-example-2-integrated-exploration-with-polygons-and-definite/sssssqtu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithm-function-example-2-integrated-exploration-with-polygons-and-definite/sssssqtu"/>
      <lastmod>2026-11-02T13:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-triangular-prisms-by-kalissa/sssssqt5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-triangular-prisms-by-kalissa/sssssqt5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-triangular-prisms-by-kalissa/sssssqt5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-triangular-prisms-by-kalissa/sssssqt5"/>
      <lastmod>2026-11-01T21:34:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-triangular-prisms-by-kalissa/sssssqt5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-triangular-prisms-by-kalissa/sssssqt5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-triangular-prisms-by-kalissa/sssssqt5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-triangular-prisms-by-kalissa/sssssqt5"/>
      <lastmod>2026-11-01T21:34:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-and-cosine-theorem-3d-visualization/sssssqtb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-and-cosine-theorem-3d-visualization/sssssqtb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-and-cosine-theorem-3d-visualization/sssssqtb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-and-cosine-theorem-3d-visualization/sssssqtb"/>
      <lastmod>2026-11-02T03:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-and-cosine-theorem-3d-visualization/sssssqtb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-and-cosine-theorem-3d-visualization/sssssqtb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-and-cosine-theorem-3d-visualization/sssssqtb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-and-cosine-theorem-3d-visualization/sssssqtb"/>
      <lastmod>2026-11-02T03:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersections-between-triangle-and-parabola/sssssqt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersections-between-triangle-and-parabola/sssssqt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersections-between-triangle-and-parabola/sssssqt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersections-between-triangle-and-parabola/sssssqt3"/>
      <lastmod>2026-11-02T17:00:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersections-between-triangle-and-parabola/sssssqt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersections-between-triangle-and-parabola/sssssqt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersections-between-triangle-and-parabola/sssssqt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersections-between-triangle-and-parabola/sssssqt3"/>
      <lastmod>2026-11-02T17:00:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-as-limit-of-sum-assessment/sssssqtq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-as-limit-of-sum-assessment/sssssqtq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-as-limit-of-sum-assessment/sssssqtq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-as-limit-of-sum-assessment/sssssqtq"/>
      <lastmod>2026-11-01T21:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-as-limit-of-sum-assessment/sssssqtq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-as-limit-of-sum-assessment/sssssqtq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-as-limit-of-sum-assessment/sssssqtq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-as-limit-of-sum-assessment/sssssqtq"/>
      <lastmod>2026-11-01T21:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-congruence-of-triangles/sssssqt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-of-triangles/sssssqt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-of-triangles/sssssqt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-of-triangles/sssssqt1"/>
      <lastmod>2026-11-02T02:27:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-congruence-of-triangles/sssssqt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-of-triangles/sssssqt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-of-triangles/sssssqt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-of-triangles/sssssqt1"/>
      <lastmod>2026-11-02T02:27:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-plane-intersecting-a-triangular-pyramid/sssssqtm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-plane-intersecting-a-triangular-pyramid/sssssqtm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-plane-intersecting-a-triangular-pyramid/sssssqtm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-plane-intersecting-a-triangular-pyramid/sssssqtm"/>
      <lastmod>2026-11-02T11:00:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-plane-intersecting-a-triangular-pyramid/sssssqtm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-plane-intersecting-a-triangular-pyramid/sssssqtm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-plane-intersecting-a-triangular-pyramid/sssssqtm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-plane-intersecting-a-triangular-pyramid/sssssqtm"/>
      <lastmod>2026-11-02T11:00:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chain-rule-derivative-demo/sssssqtj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chain-rule-derivative-demo/sssssqtj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chain-rule-derivative-demo/sssssqtj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chain-rule-derivative-demo/sssssqtj"/>
      <lastmod>2026-11-02T18:15:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chain-rule-derivative-demo/sssssqtj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chain-rule-derivative-demo/sssssqtj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chain-rule-derivative-demo/sssssqtj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chain-rule-derivative-demo/sssssqtj"/>
      <lastmod>2026-11-02T18:15:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-measurement/sssssqtp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-measurement/sssssqtp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-measurement/sssssqtp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-measurement/sssssqtp"/>
      <lastmod>2026-11-02T00:11:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-measurement/sssssqtp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-measurement/sssssqtp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-measurement/sssssqtp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-measurement/sssssqtp"/>
      <lastmod>2026-11-02T00:11:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-straight-lines/sssssqtw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-straight-lines/sssssqtw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-straight-lines/sssssqtw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-straight-lines/sssssqtw"/>
      <lastmod>2026-11-02T13:14:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-straight-lines/sssssqtw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-straight-lines/sssssqtw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-straight-lines/sssssqtw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-straight-lines/sssssqtw"/>
      <lastmod>2026-11-02T13:14:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/opposite-angles-of-cyclic-quadrilaterals/sssssqt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/opposite-angles-of-cyclic-quadrilaterals/sssssqt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/opposite-angles-of-cyclic-quadrilaterals/sssssqt6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/opposite-angles-of-cyclic-quadrilaterals/sssssqt6"/>
      <lastmod>2026-11-02T15:20:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/opposite-angles-of-cyclic-quadrilaterals/sssssqt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/opposite-angles-of-cyclic-quadrilaterals/sssssqt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/opposite-angles-of-cyclic-quadrilaterals/sssssqt6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/opposite-angles-of-cyclic-quadrilaterals/sssssqt6"/>
      <lastmod>2026-11-02T15:20:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-integer-multiplication-and-division/sssssqtg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-integer-multiplication-and-division/sssssqtg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-integer-multiplication-and-division/sssssqtg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-integer-multiplication-and-division/sssssqtg"/>
      <lastmod>2026-11-02T17:01:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-integer-multiplication-and-division/sssssqtg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-integer-multiplication-and-division/sssssqtg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-integer-multiplication-and-division/sssssqtg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-integer-multiplication-and-division/sssssqtg"/>
      <lastmod>2026-11-02T17:01:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-transformations/sssssqt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-transformations/sssssqt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-transformations/sssssqt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-transformations/sssssqt9"/>
      <lastmod>2026-11-02T16:28:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-transformations/sssssqt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-transformations/sssssqt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-transformations/sssssqt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-transformations/sssssqt9"/>
      <lastmod>2026-11-02T16:28:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-2-14-practice-four-representations/sssssqte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-2-14-practice-four-representations/sssssqte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-2-14-practice-four-representations/sssssqte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-2-14-practice-four-representations/sssssqte"/>
      <lastmod>2026-11-02T10:37:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-2-14-practice-four-representations/sssssqte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-2-14-practice-four-representations/sssssqte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-2-14-practice-four-representations/sssssqte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-2-14-practice-four-representations/sssssqte"/>
      <lastmod>2026-11-02T10:37:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-rotation-and-double-cone-construction/sssssqtv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-rotation-and-double-cone-construction/sssssqtv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-rotation-and-double-cone-construction/sssssqtv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-rotation-and-double-cone-construction/sssssqtv"/>
      <lastmod>2026-11-02T02:48:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-rotation-and-double-cone-construction/sssssqtv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-rotation-and-double-cone-construction/sssssqtv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-rotation-and-double-cone-construction/sssssqtv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-rotation-and-double-cone-construction/sssssqtv"/>
      <lastmod>2026-11-02T02:48:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/points-lines-and-planes-by-john-szynal/sssssqt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-by-john-szynal/sssssqt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-lines-and-planes-by-john-szynal/sssssqt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-by-john-szynal/sssssqt4"/>
      <lastmod>2026-11-02T03:03:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/points-lines-and-planes-by-john-szynal/sssssqt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-by-john-szynal/sssssqt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-lines-and-planes-by-john-szynal/sssssqt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-by-john-szynal/sssssqt4"/>
      <lastmod>2026-11-02T03:03:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geostix-in-geogebra-a/sssssqtl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geostix-in-geogebra-a/sssssqtl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geostix-in-geogebra-a/sssssqtl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geostix-in-geogebra-a/sssssqtl"/>
      <lastmod>2026-11-01T21:04:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geostix-in-geogebra-a/sssssqtl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geostix-in-geogebra-a/sssssqtl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geostix-in-geogebra-a/sssssqtl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geostix-in-geogebra-a/sssssqtl"/>
      <lastmod>2026-11-01T21:04:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/central-projection-3d-demo/sssssqty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-projection-3d-demo/sssssqty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-projection-3d-demo/sssssqty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-projection-3d-demo/sssssqty"/>
      <lastmod>2026-11-02T17:59:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/central-projection-3d-demo/sssssqty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-projection-3d-demo/sssssqty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-projection-3d-demo/sssssqty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-projection-3d-demo/sssssqty"/>
      <lastmod>2026-11-02T17:59:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-demonstration/sssssqta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-demonstration/sssssqta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-demonstration/sssssqta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-demonstration/sssssqta"/>
      <lastmod>2026-11-02T12:33:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-demonstration/sssssqta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-demonstration/sssssqta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-demonstration/sssssqta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-demonstration/sssssqta"/>
      <lastmod>2026-11-02T12:33:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-surface-area-demo/sssssqtc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-demo/sssssqtc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-surface-area-demo/sssssqtc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-demo/sssssqtc"/>
      <lastmod>2026-11-01T23:09:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-surface-area-demo/sssssqtc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-demo/sssssqtc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-surface-area-demo/sssssqtc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-demo/sssssqtc"/>
      <lastmod>2026-11-01T23:09:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-powers/sssssqtr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-powers/sssssqtr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-powers/sssssqtr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-powers/sssssqtr"/>
      <lastmod>2026-11-02T09:37:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-powers/sssssqtr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-powers/sssssqtr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-powers/sssssqtr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-powers/sssssqtr"/>
      <lastmod>2026-11-02T09:37:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-with-incircle-and-quadratic-functions-a-multi-element-construction/sssssqth</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-with-incircle-and-quadratic-functions-a-multi-element-construction/sssssqth"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-with-incircle-and-quadratic-functions-a-multi-element-construction/sssssqth"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-with-incircle-and-quadratic-functions-a-multi-element-construction/sssssqth"/>
      <lastmod>2026-11-02T15:12:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-with-incircle-and-quadratic-functions-a-multi-element-construction/sssssqth</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-with-incircle-and-quadratic-functions-a-multi-element-construction/sssssqth"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-with-incircle-and-quadratic-functions-a-multi-element-construction/sssssqth"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-with-incircle-and-quadratic-functions-a-multi-element-construction/sssssqth"/>
      <lastmod>2026-11-02T15:12:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-in-a-hexagon/sssssqtt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-in-a-hexagon/sssssqtt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-in-a-hexagon/sssssqtt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-in-a-hexagon/sssssqtt"/>
      <lastmod>2026-11-02T12:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-in-a-hexagon/sssssqtt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-in-a-hexagon/sssssqtt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-in-a-hexagon/sssssqtt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-in-a-hexagon/sssssqtt"/>
      <lastmod>2026-11-02T12:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conics-through-5-random-points-in-a-circle/sssssqtx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conics-through-5-random-points-in-a-circle/sssssqtx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conics-through-5-random-points-in-a-circle/sssssqtx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conics-through-5-random-points-in-a-circle/sssssqtx"/>
      <lastmod>2026-11-01T19:25:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conics-through-5-random-points-in-a-circle/sssssqtx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conics-through-5-random-points-in-a-circle/sssssqtx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conics-through-5-random-points-in-a-circle/sssssqtx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conics-through-5-random-points-in-a-circle/sssssqtx"/>
      <lastmod>2026-11-01T19:25:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/stochastic-process-3d-vector-visualization/sssssqti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stochastic-process-3d-vector-visualization/sssssqti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stochastic-process-3d-vector-visualization/sssssqti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stochastic-process-3d-vector-visualization/sssssqti"/>
      <lastmod>2026-11-02T00:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/stochastic-process-3d-vector-visualization/sssssqti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stochastic-process-3d-vector-visualization/sssssqti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stochastic-process-3d-vector-visualization/sssssqti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stochastic-process-3d-vector-visualization/sssssqti"/>
      <lastmod>2026-11-02T00:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-tangents-to-circles-interactive-investigation/sssssqto</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-tangents-to-circles-interactive-investigation/sssssqto"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-tangents-to-circles-interactive-investigation/sssssqto"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-tangents-to-circles-interactive-investigation/sssssqto"/>
      <lastmod>2026-11-01T21:43:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-tangents-to-circles-interactive-investigation/sssssqto</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-tangents-to-circles-interactive-investigation/sssssqto"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-tangents-to-circles-interactive-investigation/sssssqto"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-tangents-to-circles-interactive-investigation/sssssqto"/>
      <lastmod>2026-11-01T21:43:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transverse-wave-demonstration/sssssqxs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transverse-wave-demonstration/sssssqxs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transverse-wave-demonstration/sssssqxs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transverse-wave-demonstration/sssssqxs"/>
      <lastmod>2026-11-02T02:27:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transverse-wave-demonstration/sssssqxs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transverse-wave-demonstration/sssssqxs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transverse-wave-demonstration/sssssqxs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transverse-wave-demonstration/sssssqxs"/>
      <lastmod>2026-11-02T02:27:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/converting-fractions-to-decimals-by-raffaele-fantasia1/sssssqx7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converting-fractions-to-decimals-by-raffaele-fantasia1/sssssqx7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converting-fractions-to-decimals-by-raffaele-fantasia1/sssssqx7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converting-fractions-to-decimals-by-raffaele-fantasia1/sssssqx7"/>
      <lastmod>2026-11-02T02:49:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/converting-fractions-to-decimals-by-raffaele-fantasia1/sssssqx7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converting-fractions-to-decimals-by-raffaele-fantasia1/sssssqx7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converting-fractions-to-decimals-by-raffaele-fantasia1/sssssqx7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converting-fractions-to-decimals-by-raffaele-fantasia1/sssssqx7"/>
      <lastmod>2026-11-02T02:49:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-addition-and-subtraction-of-proper-fractions-with-like-and-unlike-de/sssssqxn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-addition-and-subtraction-of-proper-fractions-with-like-and-unlike-de/sssssqxn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-addition-and-subtraction-of-proper-fractions-with-like-and-unlike-de/sssssqxn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-addition-and-subtraction-of-proper-fractions-with-like-and-unlike-de/sssssqxn"/>
      <lastmod>2026-11-02T00:51:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-addition-and-subtraction-of-proper-fractions-with-like-and-unlike-de/sssssqxn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-addition-and-subtraction-of-proper-fractions-with-like-and-unlike-de/sssssqxn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-addition-and-subtraction-of-proper-fractions-with-like-and-unlike-de/sssssqxn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-addition-and-subtraction-of-proper-fractions-with-like-and-unlike-de/sssssqxn"/>
      <lastmod>2026-11-02T00:51:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hidden-symmetry-in-an-atom/sssssqx2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hidden-symmetry-in-an-atom/sssssqx2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hidden-symmetry-in-an-atom/sssssqx2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hidden-symmetry-in-an-atom/sssssqx2"/>
      <lastmod>2026-11-01T23:27:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hidden-symmetry-in-an-atom/sssssqx2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hidden-symmetry-in-an-atom/sssssqx2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hidden-symmetry-in-an-atom/sssssqx2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hidden-symmetry-in-an-atom/sssssqx2"/>
      <lastmod>2026-11-01T23:27:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-quadratic-equations-practice/sssssqxk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-practice/sssssqxk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-practice/sssssqxk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-practice/sssssqxk"/>
      <lastmod>2026-11-02T16:52:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-quadratic-equations-practice/sssssqxk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-practice/sssssqxk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-practice/sssssqxk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-practice/sssssqxk"/>
      <lastmod>2026-11-02T16:52:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadric-surfaces-other-algebraically-defined-surfaces-and-solids/sssssqxz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadric-surfaces-other-algebraically-defined-surfaces-and-solids/sssssqxz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadric-surfaces-other-algebraically-defined-surfaces-and-solids/sssssqxz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadric-surfaces-other-algebraically-defined-surfaces-and-solids/sssssqxz"/>
      <lastmod>2026-11-01T22:04:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadric-surfaces-other-algebraically-defined-surfaces-and-solids/sssssqxz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadric-surfaces-other-algebraically-defined-surfaces-and-solids/sssssqxz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadric-surfaces-other-algebraically-defined-surfaces-and-solids/sssssqxz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadric-surfaces-other-algebraically-defined-surfaces-and-solids/sssssqxz"/>
      <lastmod>2026-11-01T22:04:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-hyperbola-demo-by-david/sssssqx0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-hyperbola-demo-by-david/sssssqx0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-hyperbola-demo-by-david/sssssqx0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-hyperbola-demo-by-david/sssssqx0"/>
      <lastmod>2026-11-02T18:06:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-hyperbola-demo-by-david/sssssqx0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-hyperbola-demo-by-david/sssssqx0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-hyperbola-demo-by-david/sssssqx0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-hyperbola-demo-by-david/sssssqx0"/>
      <lastmod>2026-11-02T18:06:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-in-real-world/sssssqxd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-in-real-world/sssssqxd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-in-real-world/sssssqxd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-in-real-world/sssssqxd"/>
      <lastmod>2026-11-01T20:48:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-in-real-world/sssssqxd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-in-real-world/sssssqxd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-in-real-world/sssssqxd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-in-real-world/sssssqxd"/>
      <lastmod>2026-11-01T20:48:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2-digit-number-divided-by-1-digit-number/sssssqxf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2-digit-number-divided-by-1-digit-number/sssssqxf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2-digit-number-divided-by-1-digit-number/sssssqxf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2-digit-number-divided-by-1-digit-number/sssssqxf"/>
      <lastmod>2026-11-01T18:59:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2-digit-number-divided-by-1-digit-number/sssssqxf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2-digit-number-divided-by-1-digit-number/sssssqxf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2-digit-number-divided-by-1-digit-number/sssssqxf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2-digit-number-divided-by-1-digit-number/sssssqxf"/>
      <lastmod>2026-11-01T18:59:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-for-sides-in-a-right-triangle-by-tim-brzezinski/sssssqx8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-for-sides-in-a-right-triangle-by-tim-brzezinski/sssssqx8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-for-sides-in-a-right-triangle-by-tim-brzezinski/sssssqx8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-for-sides-in-a-right-triangle-by-tim-brzezinski/sssssqx8"/>
      <lastmod>2026-11-01T23:49:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-for-sides-in-a-right-triangle-by-tim-brzezinski/sssssqx8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-for-sides-in-a-right-triangle-by-tim-brzezinski/sssssqx8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-for-sides-in-a-right-triangle-by-tim-brzezinski/sssssqx8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-for-sides-in-a-right-triangle-by-tim-brzezinski/sssssqx8"/>
      <lastmod>2026-11-01T23:49:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-linear-equation-and-parabola-intersection/sssssqxu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-linear-equation-and-parabola-intersection/sssssqxu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-linear-equation-and-parabola-intersection/sssssqxu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-linear-equation-and-parabola-intersection/sssssqxu"/>
      <lastmod>2026-11-02T08:38:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-linear-equation-and-parabola-intersection/sssssqxu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-linear-equation-and-parabola-intersection/sssssqxu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-linear-equation-and-parabola-intersection/sssssqxu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-linear-equation-and-parabola-intersection/sssssqxu"/>
      <lastmod>2026-11-02T08:38:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-in-the-coordinate-plane-by-melissahertel/sssssqx5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-in-the-coordinate-plane-by-melissahertel/sssssqx5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-in-the-coordinate-plane-by-melissahertel/sssssqx5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-in-the-coordinate-plane-by-melissahertel/sssssqx5"/>
      <lastmod>2026-11-02T00:14:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-in-the-coordinate-plane-by-melissahertel/sssssqx5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-in-the-coordinate-plane-by-melissahertel/sssssqx5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-in-the-coordinate-plane-by-melissahertel/sssssqx5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-in-the-coordinate-plane-by-melissahertel/sssssqx5"/>
      <lastmod>2026-11-02T00:14:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/statistics-scatter-plots-and-the-line-of-best-fit/sssssqxb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-scatter-plots-and-the-line-of-best-fit/sssssqxb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-scatter-plots-and-the-line-of-best-fit/sssssqxb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-scatter-plots-and-the-line-of-best-fit/sssssqxb"/>
      <lastmod>2026-11-02T18:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/statistics-scatter-plots-and-the-line-of-best-fit/sssssqxb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-scatter-plots-and-the-line-of-best-fit/sssssqxb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-scatter-plots-and-the-line-of-best-fit/sssssqxb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-scatter-plots-and-the-line-of-best-fit/sssssqxb"/>
      <lastmod>2026-11-02T18:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-orthocenter-demo/sssssqx3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-orthocenter-demo/sssssqx3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-orthocenter-demo/sssssqx3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-orthocenter-demo/sssssqx3"/>
      <lastmod>2026-11-02T18:26:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-orthocenter-demo/sssssqx3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-orthocenter-demo/sssssqx3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-orthocenter-demo/sssssqx3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-orthocenter-demo/sssssqx3"/>
      <lastmod>2026-11-02T18:26:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-volume-calculation/sssssqxq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-volume-calculation/sssssqxq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-volume-calculation/sssssqxq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-volume-calculation/sssssqxq"/>
      <lastmod>2026-11-02T06:50:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-volume-calculation/sssssqxq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-volume-calculation/sssssqxq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-volume-calculation/sssssqxq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-volume-calculation/sssssqxq"/>
      <lastmod>2026-11-02T06:50:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-curves-settings/sssssqx1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-settings/sssssqx1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-settings/sssssqx1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-settings/sssssqx1"/>
      <lastmod>2026-11-01T21:59:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-curves-settings/sssssqx1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-settings/sssssqx1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-settings/sssssqx1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-settings/sssssqx1"/>
      <lastmod>2026-11-01T21:59:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-the-central-maths-hub/sssssqxm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-the-central-maths-hub/sssssqxm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-the-central-maths-hub/sssssqxm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-the-central-maths-hub/sssssqxm"/>
      <lastmod>2026-11-02T18:15:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-the-central-maths-hub/sssssqxm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-the-central-maths-hub/sssssqxm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-the-central-maths-hub/sssssqxm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-the-central-maths-hub/sssssqxm"/>
      <lastmod>2026-11-02T18:15:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curved-surface-area-of-cone-by-rocio-trejo/sssssqxj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cone-by-rocio-trejo/sssssqxj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curved-surface-area-of-cone-by-rocio-trejo/sssssqxj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cone-by-rocio-trejo/sssssqxj"/>
      <lastmod>2026-11-02T15:37:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curved-surface-area-of-cone-by-rocio-trejo/sssssqxj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cone-by-rocio-trejo/sssssqxj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curved-surface-area-of-cone-by-rocio-trejo/sssssqxj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cone-by-rocio-trejo/sssssqxj"/>
      <lastmod>2026-11-02T15:37:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-fractions-by-james-monaghan/sssssqxp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-fractions-by-james-monaghan/sssssqxp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-fractions-by-james-monaghan/sssssqxp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-fractions-by-james-monaghan/sssssqxp"/>
      <lastmod>2026-11-02T17:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-fractions-by-james-monaghan/sssssqxp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-fractions-by-james-monaghan/sssssqxp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-fractions-by-james-monaghan/sssssqxp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-fractions-by-james-monaghan/sssssqxp"/>
      <lastmod>2026-11-02T17:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-regular-hexagon/sssssqxw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-regular-hexagon/sssssqxw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-regular-hexagon/sssssqxw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-regular-hexagon/sssssqxw"/>
      <lastmod>2026-11-02T16:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-regular-hexagon/sssssqxw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-regular-hexagon/sssssqxw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-regular-hexagon/sssssqxw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-regular-hexagon/sssssqxw"/>
      <lastmod>2026-11-02T16:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-construction-with-geogebra/sssssqx6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-construction-with-geogebra/sssssqx6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-construction-with-geogebra/sssssqx6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-construction-with-geogebra/sssssqx6"/>
      <lastmod>2026-11-01T21:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-construction-with-geogebra/sssssqx6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-construction-with-geogebra/sssssqx6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-construction-with-geogebra/sssssqx6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-construction-with-geogebra/sssssqx6"/>
      <lastmod>2026-11-01T21:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matching-parabolas-3/sssssqxg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matching-parabolas-3/sssssqxg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matching-parabolas-3/sssssqxg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matching-parabolas-3/sssssqxg"/>
      <lastmod>2026-11-02T17:11:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matching-parabolas-3/sssssqxg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matching-parabolas-3/sssssqxg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matching-parabolas-3/sssssqxg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matching-parabolas-3/sssssqxg"/>
      <lastmod>2026-11-02T17:11:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-parabola-vertex-form/sssssqx9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-parabola-vertex-form/sssssqx9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-parabola-vertex-form/sssssqx9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-parabola-vertex-form/sssssqx9"/>
      <lastmod>2026-11-01T23:27:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-parabola-vertex-form/sssssqx9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-parabola-vertex-form/sssssqx9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-parabola-vertex-form/sssssqx9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-parabola-vertex-form/sssssqx9"/>
      <lastmod>2026-11-01T23:27:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-the-rolling-function/sssssqxe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-rolling-function/sssssqxe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-rolling-function/sssssqxe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-rolling-function/sssssqxe"/>
      <lastmod>2026-11-02T18:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-the-rolling-function/sssssqxe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-rolling-function/sssssqxe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-rolling-function/sssssqxe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-rolling-function/sssssqxe"/>
      <lastmod>2026-11-02T18:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-the-midpoint-of-a-line-segment/sssssqxv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-the-midpoint-of-a-line-segment/sssssqxv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-the-midpoint-of-a-line-segment/sssssqxv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-the-midpoint-of-a-line-segment/sssssqxv"/>
      <lastmod>2026-11-02T17:10:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-the-midpoint-of-a-line-segment/sssssqxv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-the-midpoint-of-a-line-segment/sssssqxv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-the-midpoint-of-a-line-segment/sssssqxv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-the-midpoint-of-a-line-segment/sssssqxv"/>
      <lastmod>2026-11-02T17:10:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-circle-and-line-using-pythagoras/sssssqx4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-circle-and-line-using-pythagoras/sssssqx4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-circle-and-line-using-pythagoras/sssssqx4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-circle-and-line-using-pythagoras/sssssqx4"/>
      <lastmod>2026-11-02T00:26:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-circle-and-line-using-pythagoras/sssssqx4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-circle-and-line-using-pythagoras/sssssqx4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-circle-and-line-using-pythagoras/sssssqx4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-circle-and-line-using-pythagoras/sssssqx4"/>
      <lastmod>2026-11-02T00:26:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ghost-function-or-paranormal-distribution/sssssqxl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ghost-function-or-paranormal-distribution/sssssqxl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ghost-function-or-paranormal-distribution/sssssqxl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ghost-function-or-paranormal-distribution/sssssqxl"/>
      <lastmod>2026-11-01T19:31:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ghost-function-or-paranormal-distribution/sssssqxl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ghost-function-or-paranormal-distribution/sssssqxl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ghost-function-or-paranormal-distribution/sssssqxl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ghost-function-or-paranormal-distribution/sssssqxl"/>
      <lastmod>2026-11-01T19:31:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vibe-sphere/sssssqxy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vibe-sphere/sssssqxy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vibe-sphere/sssssqxy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vibe-sphere/sssssqxy"/>
      <lastmod>2026-11-02T08:29:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vibe-sphere/sssssqxy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vibe-sphere/sssssqxy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vibe-sphere/sssssqxy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vibe-sphere/sssssqxy"/>
      <lastmod>2026-11-02T08:29:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-construction-and-geometric-relations-demo/sssssqxa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-construction-and-geometric-relations-demo/sssssqxa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-construction-and-geometric-relations-demo/sssssqxa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-construction-and-geometric-relations-demo/sssssqxa"/>
      <lastmod>2026-11-01T21:22:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-construction-and-geometric-relations-demo/sssssqxa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-construction-and-geometric-relations-demo/sssssqxa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-construction-and-geometric-relations-demo/sssssqxa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-construction-and-geometric-relations-demo/sssssqxa"/>
      <lastmod>2026-11-01T21:22:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compound-angle-formula-rectangle/sssssqxc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compound-angle-formula-rectangle/sssssqxc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compound-angle-formula-rectangle/sssssqxc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compound-angle-formula-rectangle/sssssqxc"/>
      <lastmod>2026-11-02T00:01:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compound-angle-formula-rectangle/sssssqxc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compound-angle-formula-rectangle/sssssqxc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compound-angle-formula-rectangle/sssssqxc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compound-angle-formula-rectangle/sssssqxc"/>
      <lastmod>2026-11-02T00:01:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-curved-surface-area-of-cones/sssssqxr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-curved-surface-area-of-cones/sssssqxr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-curved-surface-area-of-cones/sssssqxr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-curved-surface-area-of-cones/sssssqxr"/>
      <lastmod>2026-11-02T16:31:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-curved-surface-area-of-cones/sssssqxr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-curved-surface-area-of-cones/sssssqxr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-curved-surface-area-of-cones/sssssqxr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-curved-surface-area-of-cones/sssssqxr"/>
      <lastmod>2026-11-02T16:31:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-john-ulbright/sssssqxh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-john-ulbright/sssssqxh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-john-ulbright/sssssqxh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-john-ulbright/sssssqxh"/>
      <lastmod>2026-11-02T17:18:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-john-ulbright/sssssqxh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-john-ulbright/sssssqxh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-john-ulbright/sssssqxh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-john-ulbright/sssssqxh"/>
      <lastmod>2026-11-02T17:18:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-asa-theorem/sssssqxt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-asa-theorem/sssssqxt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-asa-theorem/sssssqxt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-asa-theorem/sssssqxt"/>
      <lastmod>2026-11-01T21:11:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-asa-theorem/sssssqxt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-asa-theorem/sssssqxt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-asa-theorem/sssssqxt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-asa-theorem/sssssqxt"/>
      <lastmod>2026-11-01T21:11:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-equation-solving-example/sssssqxx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-equation-solving-example/sssssqxx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-equation-solving-example/sssssqxx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-equation-solving-example/sssssqxx"/>
      <lastmod>2026-11-02T16:35:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-equation-solving-example/sssssqxx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-equation-solving-example/sssssqxx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-equation-solving-example/sssssqxx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-equation-solving-example/sssssqxx"/>
      <lastmod>2026-11-02T16:35:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-and-geometry-demo/sssssqxi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-geometry-demo/sssssqxi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-geometry-demo/sssssqxi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-geometry-demo/sssssqxi"/>
      <lastmod>2026-11-02T17:12:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-and-geometry-demo/sssssqxi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-geometry-demo/sssssqxi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-geometry-demo/sssssqxi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-geometry-demo/sssssqxi"/>
      <lastmod>2026-11-02T17:12:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/power-method-for-stochastic-matrices-7-iterations-sssssd2x/sssssqxo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-method-for-stochastic-matrices-7-iterations-sssssd2x/sssssqxo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-method-for-stochastic-matrices-7-iterations-sssssd2x/sssssqxo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-method-for-stochastic-matrices-7-iterations-sssssd2x/sssssqxo"/>
      <lastmod>2026-11-02T17:53:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/power-method-for-stochastic-matrices-7-iterations-sssssd2x/sssssqxo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-method-for-stochastic-matrices-7-iterations-sssssd2x/sssssqxo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-method-for-stochastic-matrices-7-iterations-sssssd2x/sssssqxo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-method-for-stochastic-matrices-7-iterations-sssssd2x/sssssqxo"/>
      <lastmod>2026-11-02T17:53:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-by-el-mostafa-kalmoun/sssssqis</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-by-el-mostafa-kalmoun/sssssqis"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-by-el-mostafa-kalmoun/sssssqis"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-by-el-mostafa-kalmoun/sssssqis"/>
      <lastmod>2026-11-01T23:45:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-by-el-mostafa-kalmoun/sssssqis</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-by-el-mostafa-kalmoun/sssssqis"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-by-el-mostafa-kalmoun/sssssqis"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-by-el-mostafa-kalmoun/sssssqis"/>
      <lastmod>2026-11-01T23:45:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/typical-textbook-applications-of-triangle-congruence-symmetry-and-mirror-constr/sssssqi7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/typical-textbook-applications-of-triangle-congruence-symmetry-and-mirror-constr/sssssqi7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/typical-textbook-applications-of-triangle-congruence-symmetry-and-mirror-constr/sssssqi7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/typical-textbook-applications-of-triangle-congruence-symmetry-and-mirror-constr/sssssqi7"/>
      <lastmod>2026-11-01T21:23:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/typical-textbook-applications-of-triangle-congruence-symmetry-and-mirror-constr/sssssqi7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/typical-textbook-applications-of-triangle-congruence-symmetry-and-mirror-constr/sssssqi7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/typical-textbook-applications-of-triangle-congruence-symmetry-and-mirror-constr/sssssqi7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/typical-textbook-applications-of-triangle-congruence-symmetry-and-mirror-constr/sssssqi7"/>
      <lastmod>2026-11-01T21:23:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curve-stitching-on-splines-with-rotations/sssssqin</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching-on-splines-with-rotations/sssssqin"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-on-splines-with-rotations/sssssqin"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching-on-splines-with-rotations/sssssqin"/>
      <lastmod>2026-11-02T17:39:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curve-stitching-on-splines-with-rotations/sssssqin</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching-on-splines-with-rotations/sssssqin"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-on-splines-with-rotations/sssssqin"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching-on-splines-with-rotations/sssssqin"/>
      <lastmod>2026-11-02T17:39:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-of-rectilinear-shape/sssssqi2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-rectilinear-shape/sssssqi2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-rectilinear-shape/sssssqi2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-rectilinear-shape/sssssqi2"/>
      <lastmod>2026-11-02T16:59:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-rectilinear-shape/sssssqi2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-rectilinear-shape/sssssqi2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-rectilinear-shape/sssssqi2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-rectilinear-shape/sssssqi2"/>
      <lastmod>2026-11-02T16:59:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/broken-calculator-simplified-but-not-simple/sssssqik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/broken-calculator-simplified-but-not-simple/sssssqik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/broken-calculator-simplified-but-not-simple/sssssqik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/broken-calculator-simplified-but-not-simple/sssssqik"/>
      <lastmod>2026-11-01T21:13:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/broken-calculator-simplified-but-not-simple/sssssqik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/broken-calculator-simplified-but-not-simple/sssssqik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/broken-calculator-simplified-but-not-simple/sssssqik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/broken-calculator-simplified-but-not-simple/sssssqik"/>
      <lastmod>2026-11-01T21:13:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-tailed-t-test-demo/sssssqiz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-tailed-t-test-demo/sssssqiz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-tailed-t-test-demo/sssssqiz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-tailed-t-test-demo/sssssqiz"/>
      <lastmod>2026-11-01T23:13:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-tailed-t-test-demo/sssssqiz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-tailed-t-test-demo/sssssqiz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-tailed-t-test-demo/sssssqiz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-tailed-t-test-demo/sssssqiz"/>
      <lastmod>2026-11-01T23:13:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubus-simus-and-tribonacci-numbers/sssssqi0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubus-simus-and-tribonacci-numbers/sssssqi0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubus-simus-and-tribonacci-numbers/sssssqi0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubus-simus-and-tribonacci-numbers/sssssqi0"/>
      <lastmod>2026-11-02T15:02:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubus-simus-and-tribonacci-numbers/sssssqi0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubus-simus-and-tribonacci-numbers/sssssqi0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubus-simus-and-tribonacci-numbers/sssssqi0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubus-simus-and-tribonacci-numbers/sssssqi0"/>
      <lastmod>2026-11-02T15:02:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-addition-and-scalar-multiplication-by-heather-pierce/sssssqid</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-addition-and-scalar-multiplication-by-heather-pierce/sssssqid"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-addition-and-scalar-multiplication-by-heather-pierce/sssssqid"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-addition-and-scalar-multiplication-by-heather-pierce/sssssqid"/>
      <lastmod>2026-11-01T21:38:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-addition-and-scalar-multiplication-by-heather-pierce/sssssqid</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-addition-and-scalar-multiplication-by-heather-pierce/sssssqid"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-addition-and-scalar-multiplication-by-heather-pierce/sssssqid"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-addition-and-scalar-multiplication-by-heather-pierce/sssssqid"/>
      <lastmod>2026-11-01T21:38:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/book-graph-y-int-integer-slope/sssssqif</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/book-graph-y-int-integer-slope/sssssqif"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/book-graph-y-int-integer-slope/sssssqif"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/book-graph-y-int-integer-slope/sssssqif"/>
      <lastmod>2026-11-02T00:53:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/book-graph-y-int-integer-slope/sssssqif</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/book-graph-y-int-integer-slope/sssssqif"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/book-graph-y-int-integer-slope/sssssqif"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/book-graph-y-int-integer-slope/sssssqif"/>
      <lastmod>2026-11-02T00:53:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-adam-wolfe/sssssqi8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-adam-wolfe/sssssqi8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-polygons-by-adam-wolfe/sssssqi8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-adam-wolfe/sssssqi8"/>
      <lastmod>2026-11-01T22:06:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angles-of-polygons-by-adam-wolfe/sssssqi8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-adam-wolfe/sssssqi8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-polygons-by-adam-wolfe/sssssqi8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-adam-wolfe/sssssqi8"/>
      <lastmod>2026-11-01T22:06:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-concyclic-points-from-pentagons-and-triangle/sssssqiu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-concyclic-points-from-pentagons-and-triangle/sssssqiu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-concyclic-points-from-pentagons-and-triangle/sssssqiu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-concyclic-points-from-pentagons-and-triangle/sssssqiu"/>
      <lastmod>2026-11-02T17:11:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-concyclic-points-from-pentagons-and-triangle/sssssqiu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-concyclic-points-from-pentagons-and-triangle/sssssqiu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-concyclic-points-from-pentagons-and-triangle/sssssqiu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-concyclic-points-from-pentagons-and-triangle/sssssqiu"/>
      <lastmod>2026-11-02T17:11:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-drawing-colored-balls/sssssqi5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-drawing-colored-balls/sssssqi5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-drawing-colored-balls/sssssqi5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-drawing-colored-balls/sssssqi5"/>
      <lastmod>2026-11-02T02:17:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-drawing-colored-balls/sssssqi5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-drawing-colored-balls/sssssqi5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-drawing-colored-balls/sssssqi5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-drawing-colored-balls/sssssqi5"/>
      <lastmod>2026-11-02T02:17:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-relationship-in-any-equilateral-triangle/sssssqib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-in-any-equilateral-triangle/sssssqib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-in-any-equilateral-triangle/sssssqib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-in-any-equilateral-triangle/sssssqib"/>
      <lastmod>2026-11-02T11:03:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-relationship-in-any-equilateral-triangle/sssssqib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-in-any-equilateral-triangle/sssssqib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-in-any-equilateral-triangle/sssssqib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-in-any-equilateral-triangle/sssssqib"/>
      <lastmod>2026-11-02T11:03:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-and-reflection-degrees/sssssqi3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-and-reflection-degrees/sssssqi3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-and-reflection-degrees/sssssqi3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-and-reflection-degrees/sssssqi3"/>
      <lastmod>2026-11-02T18:31:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-and-reflection-degrees/sssssqi3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-and-reflection-degrees/sssssqi3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-and-reflection-degrees/sssssqi3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-and-reflection-degrees/sssssqi3"/>
      <lastmod>2026-11-02T18:31:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-gardner-s-construction/sssssqiq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-gardner-s-construction/sssssqiq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-gardner-s-construction/sssssqiq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-gardner-s-construction/sssssqiq"/>
      <lastmod>2026-11-02T12:22:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-gardner-s-construction/sssssqiq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-gardner-s-construction/sssssqiq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-gardner-s-construction/sssssqiq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-gardner-s-construction/sssssqiq"/>
      <lastmod>2026-11-02T12:22:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-and-use-angles-intersecting-lines-and-angle-measurement/sssssqi1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-and-use-angles-intersecting-lines-and-angle-measurement/sssssqi1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-and-use-angles-intersecting-lines-and-angle-measurement/sssssqi1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-and-use-angles-intersecting-lines-and-angle-measurement/sssssqi1"/>
      <lastmod>2026-11-02T13:35:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-and-use-angles-intersecting-lines-and-angle-measurement/sssssqi1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-and-use-angles-intersecting-lines-and-angle-measurement/sssssqi1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-and-use-angles-intersecting-lines-and-angle-measurement/sssssqi1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-and-use-angles-intersecting-lines-and-angle-measurement/sssssqi1"/>
      <lastmod>2026-11-02T13:35:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/grid-moves-practice/sssssqim</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/grid-moves-practice/sssssqim"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/grid-moves-practice/sssssqim"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/grid-moves-practice/sssssqim"/>
      <lastmod>2026-11-01T23:03:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/grid-moves-practice/sssssqim</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/grid-moves-practice/sssssqim"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/grid-moves-practice/sssssqim"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/grid-moves-practice/sssssqim"/>
      <lastmod>2026-11-01T23:03:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/epsilon-delta-definition-of-a-limit/sssssqij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/epsilon-delta-definition-of-a-limit/sssssqij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/epsilon-delta-definition-of-a-limit/sssssqij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/epsilon-delta-definition-of-a-limit/sssssqij"/>
      <lastmod>2026-11-01T22:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/epsilon-delta-definition-of-a-limit/sssssqij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/epsilon-delta-definition-of-a-limit/sssssqij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/epsilon-delta-definition-of-a-limit/sssssqij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/epsilon-delta-definition-of-a-limit/sssssqij"/>
      <lastmod>2026-11-01T22:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-in-the-line-x-2/sssssqip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-the-line-x-2/sssssqip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-the-line-x-2/sssssqip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-the-line-x-2/sssssqip"/>
      <lastmod>2026-11-01T21:12:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-in-the-line-x-2/sssssqip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-the-line-x-2/sssssqip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-the-line-x-2/sssssqip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-the-line-x-2/sssssqip"/>
      <lastmod>2026-11-01T21:12:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/associated-solids-construction-of-cylinders-cones-and-prisms-via-transformati/sssssqiw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/associated-solids-construction-of-cylinders-cones-and-prisms-via-transformati/sssssqiw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/associated-solids-construction-of-cylinders-cones-and-prisms-via-transformati/sssssqiw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/associated-solids-construction-of-cylinders-cones-and-prisms-via-transformati/sssssqiw"/>
      <lastmod>2026-11-01T21:02:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/associated-solids-construction-of-cylinders-cones-and-prisms-via-transformati/sssssqiw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/associated-solids-construction-of-cylinders-cones-and-prisms-via-transformati/sssssqiw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/associated-solids-construction-of-cylinders-cones-and-prisms-via-transformati/sssssqiw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/associated-solids-construction-of-cylinders-cones-and-prisms-via-transformati/sssssqiw"/>
      <lastmod>2026-11-01T21:02:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-by-vesa2523/sssssqi6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-by-vesa2523/sssssqi6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-by-vesa2523/sssssqi6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-by-vesa2523/sssssqi6"/>
      <lastmod>2026-11-02T16:59:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-by-vesa2523/sssssqi6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-by-vesa2523/sssssqi6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-by-vesa2523/sssssqi6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-by-vesa2523/sssssqi6"/>
      <lastmod>2026-11-02T16:59:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demo-of-linear-regression-and-derivatives/sssssqig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-regression-and-derivatives/sssssqig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-linear-regression-and-derivatives/sssssqig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-regression-and-derivatives/sssssqig"/>
      <lastmod>2026-11-01T23:54:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demo-of-linear-regression-and-derivatives/sssssqig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-regression-and-derivatives/sssssqig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-linear-regression-and-derivatives/sssssqig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-regression-and-derivatives/sssssqig"/>
      <lastmod>2026-11-01T23:54:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-left-and-right-hand-riemann-sums/sssssqi9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-left-and-right-hand-riemann-sums/sssssqi9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-left-and-right-hand-riemann-sums/sssssqi9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-left-and-right-hand-riemann-sums/sssssqi9"/>
      <lastmod>2026-11-02T16:30:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-left-and-right-hand-riemann-sums/sssssqi9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-left-and-right-hand-riemann-sums/sssssqi9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-left-and-right-hand-riemann-sums/sssssqi9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-left-and-right-hand-riemann-sums/sssssqi9"/>
      <lastmod>2026-11-02T16:30:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-building-right-triangles/sssssqie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-building-right-triangles/sssssqie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-building-right-triangles/sssssqie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-building-right-triangles/sssssqie"/>
      <lastmod>2026-11-01T19:32:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-building-right-triangles/sssssqie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-building-right-triangles/sssssqie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-building-right-triangles/sssssqie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-building-right-triangles/sssssqie"/>
      <lastmod>2026-11-01T19:32:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-around-a-point/sssssqiv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-around-a-point/sssssqiv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-around-a-point/sssssqiv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-around-a-point/sssssqiv"/>
      <lastmod>2026-11-01T19:38:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-around-a-point/sssssqiv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-around-a-point/sssssqiv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-around-a-point/sssssqiv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-around-a-point/sssssqiv"/>
      <lastmod>2026-11-01T19:38:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-linear-relations-to-solve-problems/sssssqi4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-linear-relations-to-solve-problems/sssssqi4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-linear-relations-to-solve-problems/sssssqi4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-linear-relations-to-solve-problems/sssssqi4"/>
      <lastmod>2026-11-02T10:38:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-linear-relations-to-solve-problems/sssssqi4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-linear-relations-to-solve-problems/sssssqi4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-linear-relations-to-solve-problems/sssssqi4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-linear-relations-to-solve-problems/sssssqi4"/>
      <lastmod>2026-11-02T10:38:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proving-triangles-similar-3/sssssqil</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-3/sssssqil"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-similar-3/sssssqil"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-3/sssssqil"/>
      <lastmod>2026-11-01T23:59:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proving-triangles-similar-3/sssssqil</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-3/sssssqil"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-similar-3/sssssqil"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-3/sssssqil"/>
      <lastmod>2026-11-01T23:59:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-representation-of-inequalities/sssssqiy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-representation-of-inequalities/sssssqiy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-representation-of-inequalities/sssssqiy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-representation-of-inequalities/sssssqiy"/>
      <lastmod>2026-11-02T16:33:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-representation-of-inequalities/sssssqiy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-representation-of-inequalities/sssssqiy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-representation-of-inequalities/sssssqiy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-representation-of-inequalities/sssssqiy"/>
      <lastmod>2026-11-02T16:33:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angry-birds-1-math-demonstration/sssssqia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angry-birds-1-math-demonstration/sssssqia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angry-birds-1-math-demonstration/sssssqia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angry-birds-1-math-demonstration/sssssqia"/>
      <lastmod>2026-11-01T21:16:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angry-birds-1-math-demonstration/sssssqia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angry-birds-1-math-demonstration/sssssqia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angry-birds-1-math-demonstration/sssssqia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angry-birds-1-math-demonstration/sssssqia"/>
      <lastmod>2026-11-01T21:16:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/detailed-sphere-section-by-s-sharma/sssssqic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/detailed-sphere-section-by-s-sharma/sssssqic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/detailed-sphere-section-by-s-sharma/sssssqic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/detailed-sphere-section-by-s-sharma/sssssqic"/>
      <lastmod>2026-11-01T22:02:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/detailed-sphere-section-by-s-sharma/sssssqic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/detailed-sphere-section-by-s-sharma/sssssqic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/detailed-sphere-section-by-s-sharma/sssssqic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/detailed-sphere-section-by-s-sharma/sssssqic"/>
      <lastmod>2026-11-01T22:02:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-many-pyramids-in-a-cube/sssssqir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-many-pyramids-in-a-cube/sssssqir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-many-pyramids-in-a-cube/sssssqir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-many-pyramids-in-a-cube/sssssqir"/>
      <lastmod>2026-11-01T22:06:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-many-pyramids-in-a-cube/sssssqir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-many-pyramids-in-a-cube/sssssqir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-many-pyramids-in-a-cube/sssssqir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-many-pyramids-in-a-cube/sssssqir"/>
      <lastmod>2026-11-01T22:06:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-a-phenomenon-when-two-medians-of-a-triangle-are-perpend/sssssqih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-a-phenomenon-when-two-medians-of-a-triangle-are-perpend/sssssqih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-a-phenomenon-when-two-medians-of-a-triangle-are-perpend/sssssqih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-a-phenomenon-when-two-medians-of-a-triangle-are-perpend/sssssqih"/>
      <lastmod>2026-11-02T08:49:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-a-phenomenon-when-two-medians-of-a-triangle-are-perpend/sssssqih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-a-phenomenon-when-two-medians-of-a-triangle-are-perpend/sssssqih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-a-phenomenon-when-two-medians-of-a-triangle-are-perpend/sssssqih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-a-phenomenon-when-two-medians-of-a-triangle-are-perpend/sssssqih"/>
      <lastmod>2026-11-02T08:49:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mapping-diagrams-for-quartic-equations/sssssqit</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagrams-for-quartic-equations/sssssqit"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagrams-for-quartic-equations/sssssqit"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagrams-for-quartic-equations/sssssqit"/>
      <lastmod>2026-11-02T17:51:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mapping-diagrams-for-quartic-equations/sssssqit</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagrams-for-quartic-equations/sssssqit"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagrams-for-quartic-equations/sssssqit"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagrams-for-quartic-equations/sssssqit"/>
      <lastmod>2026-11-02T17:51:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kites-and-geometric-transformations/sssssqix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kites-and-geometric-transformations/sssssqix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kites-and-geometric-transformations/sssssqix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kites-and-geometric-transformations/sssssqix"/>
      <lastmod>2026-11-01T21:07:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kites-and-geometric-transformations/sssssqix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kites-and-geometric-transformations/sssssqix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kites-and-geometric-transformations/sssssqix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kites-and-geometric-transformations/sssssqix"/>
      <lastmod>2026-11-01T21:07:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logo-of-america-west-airlines/sssssqii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-of-america-west-airlines/sssssqii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-of-america-west-airlines/sssssqii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-of-america-west-airlines/sssssqii"/>
      <lastmod>2026-11-02T02:17:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logo-of-america-west-airlines/sssssqii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-of-america-west-airlines/sssssqii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-of-america-west-airlines/sssssqii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-of-america-west-airlines/sssssqii"/>
      <lastmod>2026-11-02T02:17:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solutions-of-simultaneous-equations/sssssqio</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solutions-of-simultaneous-equations/sssssqio"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solutions-of-simultaneous-equations/sssssqio"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solutions-of-simultaneous-equations/sssssqio"/>
      <lastmod>2026-11-02T17:53:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solutions-of-simultaneous-equations/sssssqio</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solutions-of-simultaneous-equations/sssssqio"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solutions-of-simultaneous-equations/sssssqio"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solutions-of-simultaneous-equations/sssssqio"/>
      <lastmod>2026-11-02T17:53:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-of-the-function-f-x-tan-x/sssssqos</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-the-function-f-x-tan-x/sssssqos"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-the-function-f-x-tan-x/sssssqos"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-the-function-f-x-tan-x/sssssqos"/>
      <lastmod>2026-11-01T23:40:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-of-the-function-f-x-tan-x/sssssqos</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-the-function-f-x-tan-x/sssssqos"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-the-function-f-x-tan-x/sssssqos"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-the-function-f-x-tan-x/sssssqos"/>
      <lastmod>2026-11-01T23:40:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ab-ferris-wheel-09-dive-into-moving-cart/sssssqo7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ab-ferris-wheel-09-dive-into-moving-cart/sssssqo7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ab-ferris-wheel-09-dive-into-moving-cart/sssssqo7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ab-ferris-wheel-09-dive-into-moving-cart/sssssqo7"/>
      <lastmod>2026-11-02T18:53:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ab-ferris-wheel-09-dive-into-moving-cart/sssssqo7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ab-ferris-wheel-09-dive-into-moving-cart/sssssqo7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ab-ferris-wheel-09-dive-into-moving-cart/sssssqo7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ab-ferris-wheel-09-dive-into-moving-cart/sssssqo7"/>
      <lastmod>2026-11-02T18:53:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-triangles-by-patrick-chung/sssssqon</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-triangles-by-patrick-chung/sssssqon"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-and-exterior-angles-of-triangles-by-patrick-chung/sssssqon"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-triangles-by-patrick-chung/sssssqon"/>
      <lastmod>2026-11-01T19:33:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interior-and-exterior-angles-of-triangles-by-patrick-chung/sssssqon</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-triangles-by-patrick-chung/sssssqon"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-and-exterior-angles-of-triangles-by-patrick-chung/sssssqon"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-triangles-by-patrick-chung/sssssqon"/>
      <lastmod>2026-11-01T19:33:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/patterns-of-a-cube-net/sssssqo2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/patterns-of-a-cube-net/sssssqo2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/patterns-of-a-cube-net/sssssqo2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/patterns-of-a-cube-net/sssssqo2"/>
      <lastmod>2026-11-02T18:46:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/patterns-of-a-cube-net/sssssqo2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/patterns-of-a-cube-net/sssssqo2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/patterns-of-a-cube-net/sssssqo2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/patterns-of-a-cube-net/sssssqo2"/>
      <lastmod>2026-11-02T18:46:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-chords-by-mrsoulen/sssssqok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-chords-by-mrsoulen/sssssqok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-chords-by-mrsoulen/sssssqok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-chords-by-mrsoulen/sssssqok"/>
      <lastmod>2026-11-02T16:44:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-chords-by-mrsoulen/sssssqok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-chords-by-mrsoulen/sssssqok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-chords-by-mrsoulen/sssssqok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-chords-by-mrsoulen/sssssqok"/>
      <lastmod>2026-11-02T16:44:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-ellipse/sssssqoz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-ellipse/sssssqoz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-ellipse/sssssqoz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-ellipse/sssssqoz"/>
      <lastmod>2026-11-02T15:53:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-ellipse/sssssqoz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-ellipse/sssssqoz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-ellipse/sssssqoz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-ellipse/sssssqoz"/>
      <lastmod>2026-11-02T15:53:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtracting-integers-on-the-real-number-line/sssssqo0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtracting-integers-on-the-real-number-line/sssssqo0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtracting-integers-on-the-real-number-line/sssssqo0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtracting-integers-on-the-real-number-line/sssssqo0"/>
      <lastmod>2026-11-02T14:57:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtracting-integers-on-the-real-number-line/sssssqo0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtracting-integers-on-the-real-number-line/sssssqo0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtracting-integers-on-the-real-number-line/sssssqo0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtracting-integers-on-the-real-number-line/sssssqo0"/>
      <lastmod>2026-11-02T14:57:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-transformation-game-find-1-parameter/sssssqod</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-transformation-game-find-1-parameter/sssssqod"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-transformation-game-find-1-parameter/sssssqod"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-transformation-game-find-1-parameter/sssssqod"/>
      <lastmod>2026-11-02T13:55:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-transformation-game-find-1-parameter/sssssqod</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-transformation-game-find-1-parameter/sssssqod"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-transformation-game-find-1-parameter/sssssqod"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-transformation-game-find-1-parameter/sssssqod"/>
      <lastmod>2026-11-02T13:55:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/boxplot/sssssqof</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/boxplot/sssssqof"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/boxplot/sssssqof"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/boxplot/sssssqof"/>
      <lastmod>2026-11-02T14:56:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/boxplot/sssssqof</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/boxplot/sssssqof"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/boxplot/sssssqof"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/boxplot/sssssqof"/>
      <lastmod>2026-11-02T14:56:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/enlargement-with-positive-fractional-scale-factor/sssssqo8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/enlargement-with-positive-fractional-scale-factor/sssssqo8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/enlargement-with-positive-fractional-scale-factor/sssssqo8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/enlargement-with-positive-fractional-scale-factor/sssssqo8"/>
      <lastmod>2026-11-02T17:46:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/enlargement-with-positive-fractional-scale-factor/sssssqo8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/enlargement-with-positive-fractional-scale-factor/sssssqo8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/enlargement-with-positive-fractional-scale-factor/sssssqo8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/enlargement-with-positive-fractional-scale-factor/sssssqo8"/>
      <lastmod>2026-11-02T17:46:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3-friends-money-application-problem-generator/sssssqou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3-friends-money-application-problem-generator/sssssqou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3-friends-money-application-problem-generator/sssssqou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3-friends-money-application-problem-generator/sssssqou"/>
      <lastmod>2026-11-01T21:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3-friends-money-application-problem-generator/sssssqou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3-friends-money-application-problem-generator/sssssqou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3-friends-money-application-problem-generator/sssssqou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3-friends-money-application-problem-generator/sssssqou"/>
      <lastmod>2026-11-01T21:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/real-component-log-z/sssssqo5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-component-log-z/sssssqo5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-component-log-z/sssssqo5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-component-log-z/sssssqo5"/>
      <lastmod>2026-11-02T02:37:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/real-component-log-z/sssssqo5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-component-log-z/sssssqo5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-component-log-z/sssssqo5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-component-log-z/sssssqo5"/>
      <lastmod>2026-11-02T02:37:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-subtraction-demo/sssssqob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-subtraction-demo/sssssqob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-subtraction-demo/sssssqob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-subtraction-demo/sssssqob"/>
      <lastmod>2026-11-01T19:22:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-subtraction-demo/sssssqob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-subtraction-demo/sssssqob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-subtraction-demo/sssssqob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-subtraction-demo/sssssqob"/>
      <lastmod>2026-11-01T19:22:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dancing-solution-curves-of-odes/sssssqo3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dancing-solution-curves-of-odes/sssssqo3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dancing-solution-curves-of-odes/sssssqo3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dancing-solution-curves-of-odes/sssssqo3"/>
      <lastmod>2026-11-01T23:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dancing-solution-curves-of-odes/sssssqo3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dancing-solution-curves-of-odes/sssssqo3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dancing-solution-curves-of-odes/sssssqo3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dancing-solution-curves-of-odes/sssssqo3"/>
      <lastmod>2026-11-01T23:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations/sssssqoq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations/sssssqoq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-rotations-dilations-and-translations/sssssqoq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations/sssssqoq"/>
      <lastmod>2026-11-01T19:15:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-rotations-dilations-and-translations/sssssqoq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations/sssssqoq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-rotations-dilations-and-translations/sssssqoq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations/sssssqoq"/>
      <lastmod>2026-11-01T19:15:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-and-critical-points-of-the-octa-point-model-s-functional-surface/sssssqo1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-critical-points-of-the-octa-point-model-s-functional-surface/sssssqo1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-critical-points-of-the-octa-point-model-s-functional-surface/sssssqo1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-critical-points-of-the-octa-point-model-s-functional-surface/sssssqo1"/>
      <lastmod>2026-11-01T23:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-and-critical-points-of-the-octa-point-model-s-functional-surface/sssssqo1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-critical-points-of-the-octa-point-model-s-functional-surface/sssssqo1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-critical-points-of-the-octa-point-model-s-functional-surface/sssssqo1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-critical-points-of-the-octa-point-model-s-functional-surface/sssssqo1"/>
      <lastmod>2026-11-01T23:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeters-of-inside-shapes-5/sssssqom</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeters-of-inside-shapes-5/sssssqom"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeters-of-inside-shapes-5/sssssqom"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeters-of-inside-shapes-5/sssssqom"/>
      <lastmod>2026-11-01T23:27:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeters-of-inside-shapes-5/sssssqom</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeters-of-inside-shapes-5/sssssqom"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeters-of-inside-shapes-5/sssssqom"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeters-of-inside-shapes-5/sssssqom"/>
      <lastmod>2026-11-01T23:27:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-root-parent-function/sssssqoj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-parent-function/sssssqoj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-parent-function/sssssqoj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-parent-function/sssssqoj"/>
      <lastmod>2026-11-02T02:41:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-root-parent-function/sssssqoj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-parent-function/sssssqoj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-parent-function/sssssqoj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-parent-function/sssssqoj"/>
      <lastmod>2026-11-02T02:41:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-exterior-angles-theorem-demo/sssssqop</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-theorem-demo/sssssqop"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-exterior-angles-theorem-demo/sssssqop"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-theorem-demo/sssssqop"/>
      <lastmod>2026-11-02T00:07:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-exterior-angles-theorem-demo/sssssqop</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-theorem-demo/sssssqop"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-exterior-angles-theorem-demo/sssssqop"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-theorem-demo/sssssqop"/>
      <lastmod>2026-11-02T00:07:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/module-8-day-4-squares/sssssqow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/module-8-day-4-squares/sssssqow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/module-8-day-4-squares/sssssqow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/module-8-day-4-squares/sssssqow"/>
      <lastmod>2026-11-02T16:43:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/module-8-day-4-squares/sssssqow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/module-8-day-4-squares/sssssqow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/module-8-day-4-squares/sssssqow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/module-8-day-4-squares/sssssqow"/>
      <lastmod>2026-11-02T16:43:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dodecahedron-exploration-template/sssssqo6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dodecahedron-exploration-template/sssssqo6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dodecahedron-exploration-template/sssssqo6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dodecahedron-exploration-template/sssssqo6"/>
      <lastmod>2026-11-02T17:39:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dodecahedron-exploration-template/sssssqo6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dodecahedron-exploration-template/sssssqo6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dodecahedron-exploration-template/sssssqo6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dodecahedron-exploration-template/sssssqo6"/>
      <lastmod>2026-11-02T17:39:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ponzi-game-geometric-demonstration/sssssqog</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ponzi-game-geometric-demonstration/sssssqog"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ponzi-game-geometric-demonstration/sssssqog"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ponzi-game-geometric-demonstration/sssssqog"/>
      <lastmod>2026-11-01T21:36:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ponzi-game-geometric-demonstration/sssssqog</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ponzi-game-geometric-demonstration/sssssqog"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ponzi-game-geometric-demonstration/sssssqog"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ponzi-game-geometric-demonstration/sssssqog"/>
      <lastmod>2026-11-01T21:36:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-maintaining-a-fixed-distance-from-a-line-segment/sssssqo9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-maintaining-a-fixed-distance-from-a-line-segment/sssssqo9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-maintaining-a-fixed-distance-from-a-line-segment/sssssqo9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-maintaining-a-fixed-distance-from-a-line-segment/sssssqo9"/>
      <lastmod>2026-11-02T08:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-maintaining-a-fixed-distance-from-a-line-segment/sssssqo9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-maintaining-a-fixed-distance-from-a-line-segment/sssssqo9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-maintaining-a-fixed-distance-from-a-line-segment/sssssqo9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-maintaining-a-fixed-distance-from-a-line-segment/sssssqo9"/>
      <lastmod>2026-11-02T08:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lu-decomposition-template/sssssqoe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lu-decomposition-template/sssssqoe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lu-decomposition-template/sssssqoe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lu-decomposition-template/sssssqoe"/>
      <lastmod>2026-11-01T21:02:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lu-decomposition-template/sssssqoe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lu-decomposition-template/sssssqoe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lu-decomposition-template/sssssqoe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lu-decomposition-template/sssssqoe"/>
      <lastmod>2026-11-01T21:02:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-on-a-number-line/sssssqov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-on-a-number-line/sssssqov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-on-a-number-line/sssssqov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-on-a-number-line/sssssqov"/>
      <lastmod>2026-11-02T17:52:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-on-a-number-line/sssssqov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-on-a-number-line/sssssqov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-on-a-number-line/sssssqov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-on-a-number-line/sssssqov"/>
      <lastmod>2026-11-02T17:52:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planets-retrograde-curve/sssssqo4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planets-retrograde-curve/sssssqo4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planets-retrograde-curve/sssssqo4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planets-retrograde-curve/sssssqo4"/>
      <lastmod>2026-11-01T20:57:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planets-retrograde-curve/sssssqo4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planets-retrograde-curve/sssssqo4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planets-retrograde-curve/sssssqo4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planets-retrograde-curve/sssssqo4"/>
      <lastmod>2026-11-01T20:57:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rainbow-flower/sssssqol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-flower/sssssqol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-flower/sssssqol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-flower/sssssqol"/>
      <lastmod>2026-11-02T18:53:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rainbow-flower/sssssqol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-flower/sssssqol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-flower/sssssqol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-flower/sssssqol"/>
      <lastmod>2026-11-02T18:53:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-square-root-translation-demo/sssssqoy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-square-root-translation-demo/sssssqoy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-square-root-translation-demo/sssssqoy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-square-root-translation-demo/sssssqoy"/>
      <lastmod>2026-11-02T17:06:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-square-root-translation-demo/sssssqoy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-square-root-translation-demo/sssssqoy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-square-root-translation-demo/sssssqoy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-square-root-translation-demo/sssssqoy"/>
      <lastmod>2026-11-02T17:06:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-template-interactive-visualizing-fractions-with-geometric-constructio/sssssqoa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-template-interactive-visualizing-fractions-with-geometric-constructio/sssssqoa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-template-interactive-visualizing-fractions-with-geometric-constructio/sssssqoa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-template-interactive-visualizing-fractions-with-geometric-constructio/sssssqoa"/>
      <lastmod>2026-11-01T19:08:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-template-interactive-visualizing-fractions-with-geometric-constructio/sssssqoa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-template-interactive-visualizing-fractions-with-geometric-constructio/sssssqoa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-template-interactive-visualizing-fractions-with-geometric-constructio/sssssqoa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-template-interactive-visualizing-fractions-with-geometric-constructio/sssssqoa"/>
      <lastmod>2026-11-01T19:08:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-cylinders-to-show-volume-of-revolution/sssssqoc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-cylinders-to-show-volume-of-revolution/sssssqoc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-cylinders-to-show-volume-of-revolution/sssssqoc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-cylinders-to-show-volume-of-revolution/sssssqoc"/>
      <lastmod>2026-11-01T23:31:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-cylinders-to-show-volume-of-revolution/sssssqoc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-cylinders-to-show-volume-of-revolution/sssssqoc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-cylinders-to-show-volume-of-revolution/sssssqoc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-cylinders-to-show-volume-of-revolution/sssssqoc"/>
      <lastmod>2026-11-01T23:31:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-in-the-coordinate-plane/sssssqor</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-in-the-coordinate-plane/sssssqor"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-in-the-coordinate-plane/sssssqor"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-in-the-coordinate-plane/sssssqor"/>
      <lastmod>2026-11-01T22:10:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-in-the-coordinate-plane/sssssqor</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-in-the-coordinate-plane/sssssqor"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-in-the-coordinate-plane/sssssqor"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-in-the-coordinate-plane/sssssqor"/>
      <lastmod>2026-11-01T22:10:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometry-basic-unit-circle/sssssqoh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometry-basic-unit-circle/sssssqoh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometry-basic-unit-circle/sssssqoh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometry-basic-unit-circle/sssssqoh"/>
      <lastmod>2026-11-02T15:36:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometry-basic-unit-circle/sssssqoh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometry-basic-unit-circle/sssssqoh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometry-basic-unit-circle/sssssqoh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometry-basic-unit-circle/sssssqoh"/>
      <lastmod>2026-11-02T15:36:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/descartes-s-mean-proportionals-logarithm-machine/sssssqot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/descartes-s-mean-proportionals-logarithm-machine/sssssqot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/descartes-s-mean-proportionals-logarithm-machine/sssssqot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/descartes-s-mean-proportionals-logarithm-machine/sssssqot"/>
      <lastmod>2026-11-02T00:22:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/descartes-s-mean-proportionals-logarithm-machine/sssssqot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/descartes-s-mean-proportionals-logarithm-machine/sssssqot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/descartes-s-mean-proportionals-logarithm-machine/sssssqot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/descartes-s-mean-proportionals-logarithm-machine/sssssqot"/>
      <lastmod>2026-11-02T00:22:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-demonstrating-rhombus-and-special-points/sssssqox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-rhombus-and-special-points/sssssqox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-rhombus-and-special-points/sssssqox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-rhombus-and-special-points/sssssqox"/>
      <lastmod>2026-11-02T17:18:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-demonstrating-rhombus-and-special-points/sssssqox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-rhombus-and-special-points/sssssqox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-rhombus-and-special-points/sssssqox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-rhombus-and-special-points/sssssqox"/>
      <lastmod>2026-11-02T17:18:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruent-triangles/sssssqoi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-triangles/sssssqoi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-triangles/sssssqoi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-triangles/sssssqoi"/>
      <lastmod>2026-11-01T20:38:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruent-triangles/sssssqoi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-triangles/sssssqoi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-triangles/sssssqoi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-triangles/sssssqoi"/>
      <lastmod>2026-11-01T20:38:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-net-by-badawy/sssssqoo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net-by-badawy/sssssqoo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net-by-badawy/sssssqoo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net-by-badawy/sssssqoo"/>
      <lastmod>2026-11-02T02:23:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-net-by-badawy/sssssqoo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net-by-badawy/sssssqoo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net-by-badawy/sssssqoo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net-by-badawy/sssssqoo"/>
      <lastmod>2026-11-02T02:23:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/joining-pyramids/sssss1ss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/joining-pyramids/sssss1ss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/joining-pyramids/sssss1ss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/joining-pyramids/sssss1ss"/>
      <lastmod>2026-11-02T16:34:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/joining-pyramids/sssss1ss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/joining-pyramids/sssss1ss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/joining-pyramids/sssss1ss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/joining-pyramids/sssss1ss"/>
      <lastmod>2026-11-02T16:34:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-to-rectangle-center-redux/sssss1s7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-to-rectangle-center-redux/sssss1s7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-to-rectangle-center-redux/sssss1s7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-to-rectangle-center-redux/sssss1s7"/>
      <lastmod>2026-11-02T18:40:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-to-rectangle-center-redux/sssss1s7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-to-rectangle-center-redux/sssss1s7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-to-rectangle-center-redux/sssss1s7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-to-rectangle-center-redux/sssss1s7"/>
      <lastmod>2026-11-02T18:40:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-all-trigonometric-ratios/sssss1sn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-all-trigonometric-ratios/sssss1sn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-all-trigonometric-ratios/sssss1sn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-all-trigonometric-ratios/sssss1sn"/>
      <lastmod>2026-11-02T11:51:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-all-trigonometric-ratios/sssss1sn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-all-trigonometric-ratios/sssss1sn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-all-trigonometric-ratios/sssss1sn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-all-trigonometric-ratios/sssss1sn"/>
      <lastmod>2026-11-02T11:51:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/percentages-3-compound-change-visualizing-successive-percentage-effects/sssss1s2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentages-3-compound-change-visualizing-successive-percentage-effects/sssss1s2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentages-3-compound-change-visualizing-successive-percentage-effects/sssss1s2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentages-3-compound-change-visualizing-successive-percentage-effects/sssss1s2"/>
      <lastmod>2026-11-02T00:47:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/percentages-3-compound-change-visualizing-successive-percentage-effects/sssss1s2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentages-3-compound-change-visualizing-successive-percentage-effects/sssss1s2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentages-3-compound-change-visualizing-successive-percentage-effects/sssss1s2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentages-3-compound-change-visualizing-successive-percentage-effects/sssss1s2"/>
      <lastmod>2026-11-02T00:47:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/output-division-among-plants/sssss1sk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/output-division-among-plants/sssss1sk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/output-division-among-plants/sssss1sk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/output-division-among-plants/sssss1sk"/>
      <lastmod>2026-11-02T17:11:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/output-division-among-plants/sssss1sk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/output-division-among-plants/sssss1sk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/output-division-among-plants/sssss1sk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/output-division-among-plants/sssss1sk"/>
      <lastmod>2026-11-02T17:11:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism-by-karen-handy/sssss1sz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism-by-karen-handy/sssss1sz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-for-a-rectangular-prism-by-karen-handy/sssss1sz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism-by-karen-handy/sssss1sz"/>
      <lastmod>2026-11-02T12:22:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-for-a-rectangular-prism-by-karen-handy/sssss1sz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism-by-karen-handy/sssss1sz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-for-a-rectangular-prism-by-karen-handy/sssss1sz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism-by-karen-handy/sssss1sz"/>
      <lastmod>2026-11-02T12:22:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inserting-and-positioning-images-in-geogebra/sssss1s0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inserting-and-positioning-images-in-geogebra/sssss1s0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inserting-and-positioning-images-in-geogebra/sssss1s0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inserting-and-positioning-images-in-geogebra/sssss1s0"/>
      <lastmod>2026-11-01T23:19:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inserting-and-positioning-images-in-geogebra/sssss1s0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inserting-and-positioning-images-in-geogebra/sssss1s0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inserting-and-positioning-images-in-geogebra/sssss1s0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inserting-and-positioning-images-in-geogebra/sssss1s0"/>
      <lastmod>2026-11-01T23:19:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/math-art-inspired-by-julio-le-parc/sssss1sd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-art-inspired-by-julio-le-parc/sssss1sd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-art-inspired-by-julio-le-parc/sssss1sd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-art-inspired-by-julio-le-parc/sssss1sd"/>
      <lastmod>2026-11-01T23:49:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/math-art-inspired-by-julio-le-parc/sssss1sd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-art-inspired-by-julio-le-parc/sssss1sd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-art-inspired-by-julio-le-parc/sssss1sd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-art-inspired-by-julio-le-parc/sssss1sd"/>
      <lastmod>2026-11-01T23:49:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vortical-model-of-philolaus-cosmos/sssss1sf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vortical-model-of-philolaus-cosmos/sssss1sf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vortical-model-of-philolaus-cosmos/sssss1sf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vortical-model-of-philolaus-cosmos/sssss1sf"/>
      <lastmod>2026-11-01T21:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vortical-model-of-philolaus-cosmos/sssss1sf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vortical-model-of-philolaus-cosmos/sssss1sf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vortical-model-of-philolaus-cosmos/sssss1sf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vortical-model-of-philolaus-cosmos/sssss1sf"/>
      <lastmod>2026-11-01T21:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-trig-solving-for-sides-2/sssss1s8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-trig-solving-for-sides-2/sssss1s8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-trig-solving-for-sides-2/sssss1s8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-trig-solving-for-sides-2/sssss1s8"/>
      <lastmod>2026-11-02T11:52:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-trig-solving-for-sides-2/sssss1s8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-trig-solving-for-sides-2/sssss1s8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-trig-solving-for-sides-2/sssss1s8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-trig-solving-for-sides-2/sssss1s8"/>
      <lastmod>2026-11-02T11:52:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/clelies-curve-on-sphere/sssss1su</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clelies-curve-on-sphere/sssss1su"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clelies-curve-on-sphere/sssss1su"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clelies-curve-on-sphere/sssss1su"/>
      <lastmod>2026-11-01T19:09:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/clelies-curve-on-sphere/sssss1su</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clelies-curve-on-sphere/sssss1su"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clelies-curve-on-sphere/sssss1su"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clelies-curve-on-sphere/sssss1su"/>
      <lastmod>2026-11-01T19:09:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/centroid-of-a-triangle-by-guillermo-bautista/sssss1s5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-of-a-triangle-by-guillermo-bautista/sssss1s5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-of-a-triangle-by-guillermo-bautista/sssss1s5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-of-a-triangle-by-guillermo-bautista/sssss1s5"/>
      <lastmod>2026-11-01T19:28:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/centroid-of-a-triangle-by-guillermo-bautista/sssss1s5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-of-a-triangle-by-guillermo-bautista/sssss1s5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-of-a-triangle-by-guillermo-bautista/sssss1s5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-of-a-triangle-by-guillermo-bautista/sssss1s5"/>
      <lastmod>2026-11-01T19:28:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/example-of-a-two-variable-function-with-no-limit-at-0-0/sssss1sb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-of-a-two-variable-function-with-no-limit-at-0-0/sssss1sb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-of-a-two-variable-function-with-no-limit-at-0-0/sssss1sb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-of-a-two-variable-function-with-no-limit-at-0-0/sssss1sb"/>
      <lastmod>2026-11-01T19:16:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/example-of-a-two-variable-function-with-no-limit-at-0-0/sssss1sb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-of-a-two-variable-function-with-no-limit-at-0-0/sssss1sb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-of-a-two-variable-function-with-no-limit-at-0-0/sssss1sb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-of-a-two-variable-function-with-no-limit-at-0-0/sssss1sb"/>
      <lastmod>2026-11-01T19:16:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-of-1-1-x-2/sssss1s3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-1-1-x-2/sssss1s3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-1-1-x-2/sssss1s3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-1-1-x-2/sssss1s3"/>
      <lastmod>2026-11-02T00:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-of-1-1-x-2/sssss1s3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-1-1-x-2/sssss1s3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-1-1-x-2/sssss1s3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-1-1-x-2/sssss1s3"/>
      <lastmod>2026-11-02T00:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-pyramid-and-cross-sections/sssss1sq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-pyramid-and-cross-sections/sssss1sq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-pyramid-and-cross-sections/sssss1sq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-pyramid-and-cross-sections/sssss1sq"/>
      <lastmod>2026-11-02T17:41:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-pyramid-and-cross-sections/sssss1sq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-pyramid-and-cross-sections/sssss1sq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-pyramid-and-cross-sections/sssss1sq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-pyramid-and-cross-sections/sssss1sq"/>
      <lastmod>2026-11-02T17:41:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-b-zier-curve/sssss1s1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-b-zier-curve/sssss1s1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-b-zier-curve/sssss1s1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-b-zier-curve/sssss1s1"/>
      <lastmod>2026-11-01T20:39:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-b-zier-curve/sssss1s1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-b-zier-curve/sssss1s1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-b-zier-curve/sssss1s1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-b-zier-curve/sssss1s1"/>
      <lastmod>2026-11-01T20:39:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/differentiating-from-first-principles/sssss1sm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differentiating-from-first-principles/sssss1sm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differentiating-from-first-principles/sssss1sm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differentiating-from-first-principles/sssss1sm"/>
      <lastmod>2026-11-01T19:11:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/differentiating-from-first-principles/sssss1sm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differentiating-from-first-principles/sssss1sm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differentiating-from-first-principles/sssss1sm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differentiating-from-first-principles/sssss1sm"/>
      <lastmod>2026-11-01T19:11:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-demonstrating-polygon-and-circle-relationships/sssss1sj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-polygon-and-circle-relationships/sssss1sj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-polygon-and-circle-relationships/sssss1sj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-polygon-and-circle-relationships/sssss1sj"/>
      <lastmod>2026-11-02T17:03:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-demonstrating-polygon-and-circle-relationships/sssss1sj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-polygon-and-circle-relationships/sssss1sj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-polygon-and-circle-relationships/sssss1sj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-polygon-and-circle-relationships/sssss1sj"/>
      <lastmod>2026-11-02T17:03:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-a-complementary-angle/sssss1sp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-a-complementary-angle/sssss1sp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-a-complementary-angle/sssss1sp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-a-complementary-angle/sssss1sp"/>
      <lastmod>2026-11-01T21:03:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-a-complementary-angle/sssss1sp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-a-complementary-angle/sssss1sp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-a-complementary-angle/sssss1sp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-a-complementary-angle/sssss1sp"/>
      <lastmod>2026-11-01T21:03:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-geogebra-example-exploring-segment-addition-postulate/sssss1sw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-geogebra-example-exploring-segment-addition-postulate/sssss1sw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-geogebra-example-exploring-segment-addition-postulate/sssss1sw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-geogebra-example-exploring-segment-addition-postulate/sssss1sw"/>
      <lastmod>2026-11-02T00:39:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-geogebra-example-exploring-segment-addition-postulate/sssss1sw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-geogebra-example-exploring-segment-addition-postulate/sssss1sw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-geogebra-example-exploring-segment-addition-postulate/sssss1sw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-geogebra-example-exploring-segment-addition-postulate/sssss1sw"/>
      <lastmod>2026-11-02T00:39:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-imaginary-component-arctan-z/sssss1s6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-imaginary-component-arctan-z/sssss1s6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-imaginary-component-arctan-z/sssss1s6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-imaginary-component-arctan-z/sssss1s6"/>
      <lastmod>2026-11-02T17:38:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-imaginary-component-arctan-z/sssss1s6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-imaginary-component-arctan-z/sssss1s6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-imaginary-component-arctan-z/sssss1s6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-imaginary-component-arctan-z/sssss1s6"/>
      <lastmod>2026-11-02T17:38:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demo/sssss1sg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demo/sssss1sg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-midsegment-theorem-demo/sssss1sg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demo/sssss1sg"/>
      <lastmod>2026-11-02T17:57:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-midsegment-theorem-demo/sssss1sg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demo/sssss1sg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-midsegment-theorem-demo/sssss1sg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demo/sssss1sg"/>
      <lastmod>2026-11-02T17:57:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/year-3-chapter-2-parabola-exercise-geometry-and-statistics/sssss1s9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/year-3-chapter-2-parabola-exercise-geometry-and-statistics/sssss1s9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/year-3-chapter-2-parabola-exercise-geometry-and-statistics/sssss1s9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/year-3-chapter-2-parabola-exercise-geometry-and-statistics/sssss1s9"/>
      <lastmod>2026-11-02T18:50:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/year-3-chapter-2-parabola-exercise-geometry-and-statistics/sssss1s9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/year-3-chapter-2-parabola-exercise-geometry-and-statistics/sssss1s9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/year-3-chapter-2-parabola-exercise-geometry-and-statistics/sssss1s9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/year-3-chapter-2-parabola-exercise-geometry-and-statistics/sssss1s9"/>
      <lastmod>2026-11-02T18:50:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-and-perimeter-of-rectangle-2/sssss1se</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-rectangle-2/sssss1se"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-rectangle-2/sssss1se"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-rectangle-2/sssss1se"/>
      <lastmod>2026-11-02T08:33:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-and-perimeter-of-rectangle-2/sssss1se</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-rectangle-2/sssss1se"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-rectangle-2/sssss1se"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-rectangle-2/sssss1se"/>
      <lastmod>2026-11-02T08:33:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-and-differential-calculus-interactive-demo/sssss1sv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-differential-calculus-interactive-demo/sssss1sv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-differential-calculus-interactive-demo/sssss1sv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-differential-calculus-interactive-demo/sssss1sv"/>
      <lastmod>2026-11-02T02:48:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-and-differential-calculus-interactive-demo/sssss1sv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-differential-calculus-interactive-demo/sssss1sv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-differential-calculus-interactive-demo/sssss1sv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-differential-calculus-interactive-demo/sssss1sv"/>
      <lastmod>2026-11-02T02:48:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/baravelle-dodecahedron/sssss1s4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baravelle-dodecahedron/sssss1s4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baravelle-dodecahedron/sssss1s4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baravelle-dodecahedron/sssss1s4"/>
      <lastmod>2026-11-01T23:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/baravelle-dodecahedron/sssss1s4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baravelle-dodecahedron/sssss1s4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baravelle-dodecahedron/sssss1s4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baravelle-dodecahedron/sssss1s4"/>
      <lastmod>2026-11-01T23:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-to-cylinder/sssss1sl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-to-cylinder/sssss1sl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-to-cylinder/sssss1sl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-to-cylinder/sssss1sl"/>
      <lastmod>2026-11-01T19:15:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-to-cylinder/sssss1sl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-to-cylinder/sssss1sl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-to-cylinder/sssss1sl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-to-cylinder/sssss1sl"/>
      <lastmod>2026-11-01T19:15:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/franz-van-schooten-s-ellipse-construction/sssss1sy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/franz-van-schooten-s-ellipse-construction/sssss1sy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/franz-van-schooten-s-ellipse-construction/sssss1sy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/franz-van-schooten-s-ellipse-construction/sssss1sy"/>
      <lastmod>2026-11-02T17:56:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/franz-van-schooten-s-ellipse-construction/sssss1sy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/franz-van-schooten-s-ellipse-construction/sssss1sy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/franz-van-schooten-s-ellipse-construction/sssss1sy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/franz-van-schooten-s-ellipse-construction/sssss1sy"/>
      <lastmod>2026-11-02T17:56:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/space-invasion-game-integer-multiplication/sssss1sa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-invasion-game-integer-multiplication/sssss1sa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-invasion-game-integer-multiplication/sssss1sa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-invasion-game-integer-multiplication/sssss1sa"/>
      <lastmod>2026-11-02T17:52:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/space-invasion-game-integer-multiplication/sssss1sa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-invasion-game-integer-multiplication/sssss1sa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-invasion-game-integer-multiplication/sssss1sa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-invasion-game-integer-multiplication/sssss1sa"/>
      <lastmod>2026-11-02T17:52:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-multiplication-visual-practice-cueba0008/sssss1sc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-visual-practice-cueba0008/sssss1sc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-visual-practice-cueba0008/sssss1sc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-visual-practice-cueba0008/sssss1sc"/>
      <lastmod>2026-11-02T17:39:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-multiplication-visual-practice-cueba0008/sssss1sc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-visual-practice-cueba0008/sssss1sc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-visual-practice-cueba0008/sssss1sc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-visual-practice-cueba0008/sssss1sc"/>
      <lastmod>2026-11-02T17:39:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-of-f-x-x-1-x-1/sssss1sr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-f-x-x-1-x-1/sssss1sr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-f-x-x-1-x-1/sssss1sr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-f-x-x-1-x-1/sssss1sr"/>
      <lastmod>2026-11-02T03:07:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-of-f-x-x-1-x-1/sssss1sr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-f-x-x-1-x-1/sssss1sr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-f-x-x-1-x-1/sssss1sr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-f-x-x-1-x-1/sssss1sr"/>
      <lastmod>2026-11-02T03:07:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-perpendicular-bisector-of-a-line-segment/sssss1sh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-perpendicular-bisector-of-a-line-segment/sssss1sh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-perpendicular-bisector-of-a-line-segment/sssss1sh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-perpendicular-bisector-of-a-line-segment/sssss1sh"/>
      <lastmod>2026-11-02T18:25:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-perpendicular-bisector-of-a-line-segment/sssss1sh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-perpendicular-bisector-of-a-line-segment/sssss1sh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-perpendicular-bisector-of-a-line-segment/sssss1sh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-perpendicular-bisector-of-a-line-segment/sssss1sh"/>
      <lastmod>2026-11-02T18:25:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/digits-numbers-word-problems-geogebra-example/sssss1st</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/digits-numbers-word-problems-geogebra-example/sssss1st"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/digits-numbers-word-problems-geogebra-example/sssss1st"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/digits-numbers-word-problems-geogebra-example/sssss1st"/>
      <lastmod>2026-11-02T13:35:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/digits-numbers-word-problems-geogebra-example/sssss1st</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/digits-numbers-word-problems-geogebra-example/sssss1st"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/digits-numbers-word-problems-geogebra-example/sssss1st"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/digits-numbers-word-problems-geogebra-example/sssss1st"/>
      <lastmod>2026-11-02T13:35:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/generating-a-parabola-from-two-linear-functions/sssss1sx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generating-a-parabola-from-two-linear-functions/sssss1sx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generating-a-parabola-from-two-linear-functions/sssss1sx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generating-a-parabola-from-two-linear-functions/sssss1sx"/>
      <lastmod>2026-11-02T18:29:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/generating-a-parabola-from-two-linear-functions/sssss1sx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generating-a-parabola-from-two-linear-functions/sssss1sx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generating-a-parabola-from-two-linear-functions/sssss1sx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generating-a-parabola-from-two-linear-functions/sssss1sx"/>
      <lastmod>2026-11-02T18:29:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/projectile-motion-by-filip-bar/sssss1si</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-by-filip-bar/sssss1si"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-by-filip-bar/sssss1si"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-by-filip-bar/sssss1si"/>
      <lastmod>2026-11-02T02:22:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/projectile-motion-by-filip-bar/sssss1si</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-by-filip-bar/sssss1si"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-by-filip-bar/sssss1si"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-by-filip-bar/sssss1si"/>
      <lastmod>2026-11-02T02:22:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-translation-by-terry-lee-lindenmuth/sssss1so</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-translation-by-terry-lee-lindenmuth/sssss1so"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-translation-by-terry-lee-lindenmuth/sssss1so"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-translation-by-terry-lee-lindenmuth/sssss1so"/>
      <lastmod>2026-11-02T16:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-translation-by-terry-lee-lindenmuth/sssss1so</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-translation-by-terry-lee-lindenmuth/sssss1so"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-translation-by-terry-lee-lindenmuth/sssss1so"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-translation-by-terry-lee-lindenmuth/sssss1so"/>
      <lastmod>2026-11-02T16:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-and-poisson-distribution/sssss17s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-and-poisson-distribution/sssss17s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-and-poisson-distribution/sssss17s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-and-poisson-distribution/sssss17s"/>
      <lastmod>2026-11-02T12:20:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-and-poisson-distribution/sssss17s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-and-poisson-distribution/sssss17s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-and-poisson-distribution/sssss17s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-and-poisson-distribution/sssss17s"/>
      <lastmod>2026-11-02T12:20:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/defining-trig-ratios-dynamic-right-triangle-exploration/sssss177</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-trig-ratios-dynamic-right-triangle-exploration/sssss177"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-trig-ratios-dynamic-right-triangle-exploration/sssss177"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-trig-ratios-dynamic-right-triangle-exploration/sssss177"/>
      <lastmod>2026-11-01T20:49:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/defining-trig-ratios-dynamic-right-triangle-exploration/sssss177</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-trig-ratios-dynamic-right-triangle-exploration/sssss177"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-trig-ratios-dynamic-right-triangle-exploration/sssss177"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-trig-ratios-dynamic-right-triangle-exploration/sssss177"/>
      <lastmod>2026-11-01T20:49:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-solution-of-a-linear-system/sssss17n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-solution-of-a-linear-system/sssss17n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-solution-of-a-linear-system/sssss17n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-solution-of-a-linear-system/sssss17n"/>
      <lastmod>2026-11-02T08:31:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-solution-of-a-linear-system/sssss17n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-solution-of-a-linear-system/sssss17n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-solution-of-a-linear-system/sssss17n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-solution-of-a-linear-system/sssss17n"/>
      <lastmod>2026-11-02T08:31:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-unit-circle-sine-curve/sssss172</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-unit-circle-sine-curve/sssss172"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-unit-circle-sine-curve/sssss172"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-unit-circle-sine-curve/sssss172"/>
      <lastmod>2026-11-01T19:07:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-unit-circle-sine-curve/sssss172</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-unit-circle-sine-curve/sssss172"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-unit-circle-sine-curve/sssss172"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-unit-circle-sine-curve/sssss172"/>
      <lastmod>2026-11-01T19:07:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-inside-cone/sssss17k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-inside-cone/sssss17k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-inside-cone/sssss17k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-inside-cone/sssss17k"/>
      <lastmod>2026-11-02T17:11:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-inside-cone/sssss17k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-inside-cone/sssss17k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-inside-cone/sssss17k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-inside-cone/sssss17k"/>
      <lastmod>2026-11-02T17:11:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-exploration-2/sssss17z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-exploration-2/sssss17z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-exploration-2/sssss17z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-exploration-2/sssss17z"/>
      <lastmod>2026-11-02T15:48:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-exploration-2/sssss17z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-exploration-2/sssss17z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-exploration-2/sssss17z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-exploration-2/sssss17z"/>
      <lastmod>2026-11-02T15:48:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nature-of-roots-by-doganyunus/sssss170</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nature-of-roots-by-doganyunus/sssss170"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nature-of-roots-by-doganyunus/sssss170"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nature-of-roots-by-doganyunus/sssss170"/>
      <lastmod>2026-11-02T18:36:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nature-of-roots-by-doganyunus/sssss170</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nature-of-roots-by-doganyunus/sssss170"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nature-of-roots-by-doganyunus/sssss170"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nature-of-roots-by-doganyunus/sssss170"/>
      <lastmod>2026-11-02T18:36:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-constructions-with-alternative-directrix/sssss17d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-constructions-with-alternative-directrix/sssss17d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-constructions-with-alternative-directrix/sssss17d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-constructions-with-alternative-directrix/sssss17d"/>
      <lastmod>2026-11-02T12:34:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-constructions-with-alternative-directrix/sssss17d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-constructions-with-alternative-directrix/sssss17d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-constructions-with-alternative-directrix/sssss17d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-constructions-with-alternative-directrix/sssss17d"/>
      <lastmod>2026-11-02T12:34:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/puzzle-2-exploring-similarity-transformations-and-symmetry/sssss17f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/puzzle-2-exploring-similarity-transformations-and-symmetry/sssss17f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/puzzle-2-exploring-similarity-transformations-and-symmetry/sssss17f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/puzzle-2-exploring-similarity-transformations-and-symmetry/sssss17f"/>
      <lastmod>2026-11-02T18:57:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/puzzle-2-exploring-similarity-transformations-and-symmetry/sssss17f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/puzzle-2-exploring-similarity-transformations-and-symmetry/sssss17f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/puzzle-2-exploring-similarity-transformations-and-symmetry/sssss17f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/puzzle-2-exploring-similarity-transformations-and-symmetry/sssss17f"/>
      <lastmod>2026-11-02T18:57:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-intercept-form-demo/sssss178</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-intercept-form-demo/sssss178"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-intercept-form-demo/sssss178"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-intercept-form-demo/sssss178"/>
      <lastmod>2026-11-02T18:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-intercept-form-demo/sssss178</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-intercept-form-demo/sssss178"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-intercept-form-demo/sssss178"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-intercept-form-demo/sssss178"/>
      <lastmod>2026-11-02T18:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-3rd-harmonic-to-fundamental-frequency/sssss17u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-3rd-harmonic-to-fundamental-frequency/sssss17u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-3rd-harmonic-to-fundamental-frequency/sssss17u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-3rd-harmonic-to-fundamental-frequency/sssss17u"/>
      <lastmod>2026-11-02T13:52:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-3rd-harmonic-to-fundamental-frequency/sssss17u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-3rd-harmonic-to-fundamental-frequency/sssss17u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-3rd-harmonic-to-fundamental-frequency/sssss17u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-3rd-harmonic-to-fundamental-frequency/sssss17u"/>
      <lastmod>2026-11-02T13:52:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygons-in-the-coordinate-plane/sssss175</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygons-in-the-coordinate-plane/sssss175"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygons-in-the-coordinate-plane/sssss175"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygons-in-the-coordinate-plane/sssss175"/>
      <lastmod>2026-11-01T19:17:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygons-in-the-coordinate-plane/sssss175</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygons-in-the-coordinate-plane/sssss175"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygons-in-the-coordinate-plane/sssss175"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygons-in-the-coordinate-plane/sssss175"/>
      <lastmod>2026-11-01T19:17:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-and-trapezoid-construction/sssss17b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-and-trapezoid-construction/sssss17b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-and-trapezoid-construction/sssss17b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-and-trapezoid-construction/sssss17b"/>
      <lastmod>2026-11-02T17:05:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-and-trapezoid-construction/sssss17b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-and-trapezoid-construction/sssss17b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-and-trapezoid-construction/sssss17b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-and-trapezoid-construction/sssss17b"/>
      <lastmod>2026-11-02T17:05:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-guided-practice/sssss173</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-guided-practice/sssss173"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-guided-practice/sssss173"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-guided-practice/sssss173"/>
      <lastmod>2026-11-02T17:44:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-guided-practice/sssss173</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-guided-practice/sssss173"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-guided-practice/sssss173"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-guided-practice/sssss173"/>
      <lastmod>2026-11-02T17:44:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discovering-properties-of-parallelograms-scaffolded-discovery/sssss17q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovering-properties-of-parallelograms-scaffolded-discovery/sssss17q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovering-properties-of-parallelograms-scaffolded-discovery/sssss17q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovering-properties-of-parallelograms-scaffolded-discovery/sssss17q"/>
      <lastmod>2026-11-02T07:25:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discovering-properties-of-parallelograms-scaffolded-discovery/sssss17q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovering-properties-of-parallelograms-scaffolded-discovery/sssss17q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovering-properties-of-parallelograms-scaffolded-discovery/sssss17q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovering-properties-of-parallelograms-scaffolded-discovery/sssss17q"/>
      <lastmod>2026-11-02T07:25:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distances-in-reflections-over-parallel-lines/sssss171</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distances-in-reflections-over-parallel-lines/sssss171"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distances-in-reflections-over-parallel-lines/sssss171"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distances-in-reflections-over-parallel-lines/sssss171"/>
      <lastmod>2026-11-02T17:47:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distances-in-reflections-over-parallel-lines/sssss171</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distances-in-reflections-over-parallel-lines/sssss171"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distances-in-reflections-over-parallel-lines/sssss171"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distances-in-reflections-over-parallel-lines/sssss171"/>
      <lastmod>2026-11-02T17:47:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-sphere/sssss17m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-sphere/sssss17m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cylinder-and-sphere/sssss17m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-sphere/sssss17m"/>
      <lastmod>2026-11-01T20:58:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-cylinder-and-sphere/sssss17m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-sphere/sssss17m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cylinder-and-sphere/sssss17m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-sphere/sssss17m"/>
      <lastmod>2026-11-01T20:58:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visual-demonstration-of-law-of-cosines/sssss17j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-demonstration-of-law-of-cosines/sssss17j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-demonstration-of-law-of-cosines/sssss17j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-demonstration-of-law-of-cosines/sssss17j"/>
      <lastmod>2026-11-01T21:03:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visual-demonstration-of-law-of-cosines/sssss17j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-demonstration-of-law-of-cosines/sssss17j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-demonstration-of-law-of-cosines/sssss17j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-demonstration-of-law-of-cosines/sssss17j"/>
      <lastmod>2026-11-01T21:03:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sampling-distribution/sssss17p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sampling-distribution/sssss17p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sampling-distribution/sssss17p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sampling-distribution/sssss17p"/>
      <lastmod>2026-11-01T20:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sampling-distribution/sssss17p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sampling-distribution/sssss17p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sampling-distribution/sssss17p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sampling-distribution/sssss17p"/>
      <lastmod>2026-11-01T20:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/peeling-a-cube/sssss17w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/peeling-a-cube/sssss17w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/peeling-a-cube/sssss17w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/peeling-a-cube/sssss17w"/>
      <lastmod>2026-11-02T18:33:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/peeling-a-cube/sssss17w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/peeling-a-cube/sssss17w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/peeling-a-cube/sssss17w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/peeling-a-cube/sssss17w"/>
      <lastmod>2026-11-02T18:33:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/medians-and-centroid-illustrated/sssss176</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-and-centroid-illustrated/sssss176"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-and-centroid-illustrated/sssss176"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-and-centroid-illustrated/sssss176"/>
      <lastmod>2026-11-02T02:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/medians-and-centroid-illustrated/sssss176</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-and-centroid-illustrated/sssss176"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-and-centroid-illustrated/sssss176"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-and-centroid-illustrated/sssss176"/>
      <lastmod>2026-11-02T02:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/moment-projection-on-an-axis-in-3d/sssss17g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moment-projection-on-an-axis-in-3d/sssss17g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moment-projection-on-an-axis-in-3d/sssss17g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moment-projection-on-an-axis-in-3d/sssss17g"/>
      <lastmod>2026-11-01T21:59:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/moment-projection-on-an-axis-in-3d/sssss17g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moment-projection-on-an-axis-in-3d/sssss17g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moment-projection-on-an-axis-in-3d/sssss17g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moment-projection-on-an-axis-in-3d/sssss17g"/>
      <lastmod>2026-11-01T21:59:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-the-unit-circle/sssss179</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-the-unit-circle/sssss179"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-the-unit-circle/sssss179"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-the-unit-circle/sssss179"/>
      <lastmod>2026-11-01T21:03:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-the-unit-circle/sssss179</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-the-unit-circle/sssss179"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-the-unit-circle/sssss179"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-the-unit-circle/sssss179"/>
      <lastmod>2026-11-01T21:03:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-animation-to-show-circle-symmetry/sssss17e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-animation-to-show-circle-symmetry/sssss17e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-animation-to-show-circle-symmetry/sssss17e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-animation-to-show-circle-symmetry/sssss17e"/>
      <lastmod>2026-11-02T12:43:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-animation-to-show-circle-symmetry/sssss17e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-animation-to-show-circle-symmetry/sssss17e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-animation-to-show-circle-symmetry/sssss17e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-animation-to-show-circle-symmetry/sssss17e"/>
      <lastmod>2026-11-02T12:43:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sara-germany-polygon-and-function-combined-construction/sssss17v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sara-germany-polygon-and-function-combined-construction/sssss17v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sara-germany-polygon-and-function-combined-construction/sssss17v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sara-germany-polygon-and-function-combined-construction/sssss17v"/>
      <lastmod>2026-11-01T19:21:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sara-germany-polygon-and-function-combined-construction/sssss17v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sara-germany-polygon-and-function-combined-construction/sssss17v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sara-germany-polygon-and-function-combined-construction/sssss17v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sara-germany-polygon-and-function-combined-construction/sssss17v"/>
      <lastmod>2026-11-01T19:21:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-8-7-4-practice-dividing-powers-of-10/sssss174</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-7-4-practice-dividing-powers-of-10/sssss174"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-7-4-practice-dividing-powers-of-10/sssss174"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-7-4-practice-dividing-powers-of-10/sssss174"/>
      <lastmod>2026-11-02T10:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-8-7-4-practice-dividing-powers-of-10/sssss174</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-7-4-practice-dividing-powers-of-10/sssss174"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-7-4-practice-dividing-powers-of-10/sssss174"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-7-4-practice-dividing-powers-of-10/sssss174"/>
      <lastmod>2026-11-02T10:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombic-dodecahedron-from-cube-animation/sssss17l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombic-dodecahedron-from-cube-animation/sssss17l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombic-dodecahedron-from-cube-animation/sssss17l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombic-dodecahedron-from-cube-animation/sssss17l"/>
      <lastmod>2026-11-02T03:00:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombic-dodecahedron-from-cube-animation/sssss17l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombic-dodecahedron-from-cube-animation/sssss17l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombic-dodecahedron-from-cube-animation/sssss17l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombic-dodecahedron-from-cube-animation/sssss17l"/>
      <lastmod>2026-11-02T03:00:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/de-morgan-s-law-by-geometric-construction/sssss17y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/de-morgan-s-law-by-geometric-construction/sssss17y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/de-morgan-s-law-by-geometric-construction/sssss17y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/de-morgan-s-law-by-geometric-construction/sssss17y"/>
      <lastmod>2026-11-01T21:00:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/de-morgan-s-law-by-geometric-construction/sssss17y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/de-morgan-s-law-by-geometric-construction/sssss17y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/de-morgan-s-law-by-geometric-construction/sssss17y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/de-morgan-s-law-by-geometric-construction/sssss17y"/>
      <lastmod>2026-11-01T21:00:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/0-99-hundred-grid/sssss17a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/0-99-hundred-grid/sssss17a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/0-99-hundred-grid/sssss17a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/0-99-hundred-grid/sssss17a"/>
      <lastmod>2026-11-02T09:19:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/0-99-hundred-grid/sssss17a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/0-99-hundred-grid/sssss17a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/0-99-hundred-grid/sssss17a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/0-99-hundred-grid/sssss17a"/>
      <lastmod>2026-11-02T09:19:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-8-1-14-practice-alternate-interior-angles/sssss17c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-1-14-practice-alternate-interior-angles/sssss17c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-1-14-practice-alternate-interior-angles/sssss17c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-1-14-practice-alternate-interior-angles/sssss17c"/>
      <lastmod>2026-11-01T20:32:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-8-1-14-practice-alternate-interior-angles/sssss17c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-1-14-practice-alternate-interior-angles/sssss17c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-1-14-practice-alternate-interior-angles/sssss17c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-1-14-practice-alternate-interior-angles/sssss17c"/>
      <lastmod>2026-11-01T20:32:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dividing-decimals-example/sssss17r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-decimals-example/sssss17r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-decimals-example/sssss17r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-decimals-example/sssss17r"/>
      <lastmod>2026-11-01T20:24:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dividing-decimals-example/sssss17r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-decimals-example/sssss17r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-decimals-example/sssss17r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-decimals-example/sssss17r"/>
      <lastmod>2026-11-01T20:24:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-sums-with-input-boxes/sssss17h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sums-with-input-boxes/sssss17h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sums-with-input-boxes/sssss17h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sums-with-input-boxes/sssss17h"/>
      <lastmod>2026-11-02T17:48:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-sums-with-input-boxes/sssss17h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sums-with-input-boxes/sssss17h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sums-with-input-boxes/sssss17h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sums-with-input-boxes/sssss17h"/>
      <lastmod>2026-11-02T17:48:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connectivity-matrix-visualizing-polygon-vertex-connections/sssss17t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-matrix-visualizing-polygon-vertex-connections/sssss17t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-matrix-visualizing-polygon-vertex-connections/sssss17t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-matrix-visualizing-polygon-vertex-connections/sssss17t"/>
      <lastmod>2026-11-02T18:46:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connectivity-matrix-visualizing-polygon-vertex-connections/sssss17t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-matrix-visualizing-polygon-vertex-connections/sssss17t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-matrix-visualizing-polygon-vertex-connections/sssss17t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-matrix-visualizing-polygon-vertex-connections/sssss17t"/>
      <lastmod>2026-11-02T18:46:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-wheel/sssss17x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-wheel/sssss17x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-wheel/sssss17x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-wheel/sssss17x"/>
      <lastmod>2026-11-02T08:38:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-wheel/sssss17x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-wheel/sssss17x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-wheel/sssss17x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-wheel/sssss17x"/>
      <lastmod>2026-11-02T08:38:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-art-maria/sssss17i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-art-maria/sssss17i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-art-maria/sssss17i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-art-maria/sssss17i"/>
      <lastmod>2026-11-01T21:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-art-maria/sssss17i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-art-maria/sssss17i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-art-maria/sssss17i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-art-maria/sssss17i"/>
      <lastmod>2026-11-01T21:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-exploration-3-centroid-and-random-experiments-in-geometry/sssss17o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-3-centroid-and-random-experiments-in-geometry/sssss17o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-exploration-3-centroid-and-random-experiments-in-geometry/sssss17o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-3-centroid-and-random-experiments-in-geometry/sssss17o"/>
      <lastmod>2026-11-02T17:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-exploration-3-centroid-and-random-experiments-in-geometry/sssss17o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-3-centroid-and-random-experiments-in-geometry/sssss17o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-exploration-3-centroid-and-random-experiments-in-geometry/sssss17o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-3-centroid-and-random-experiments-in-geometry/sssss17o"/>
      <lastmod>2026-11-02T17:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-sine-function-by-peter-sassman/sssss1ns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sine-function-by-peter-sassman/sssss1ns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sine-function-by-peter-sassman/sssss1ns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sine-function-by-peter-sassman/sssss1ns"/>
      <lastmod>2026-11-02T17:57:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-sine-function-by-peter-sassman/sssss1ns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sine-function-by-peter-sassman/sssss1ns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sine-function-by-peter-sassman/sssss1ns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sine-function-by-peter-sassman/sssss1ns"/>
      <lastmod>2026-11-02T17:57:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logic-and-function-geometric-transformations/sssss1n7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logic-and-function-geometric-transformations/sssss1n7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logic-and-function-geometric-transformations/sssss1n7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logic-and-function-geometric-transformations/sssss1n7"/>
      <lastmod>2026-11-01T21:52:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logic-and-function-geometric-transformations/sssss1n7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logic-and-function-geometric-transformations/sssss1n7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logic-and-function-geometric-transformations/sssss1n7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logic-and-function-geometric-transformations/sssss1n7"/>
      <lastmod>2026-11-01T21:52:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-pyramid-cross-section/sssss1nn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-pyramid-cross-section/sssss1nn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-pyramid-cross-section/sssss1nn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-pyramid-cross-section/sssss1nn"/>
      <lastmod>2026-11-01T19:20:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-pyramid-cross-section/sssss1nn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-pyramid-cross-section/sssss1nn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-pyramid-cross-section/sssss1nn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-pyramid-cross-section/sssss1nn"/>
      <lastmod>2026-11-01T19:20:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-without-words/sssss1n2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words/sssss1n2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words/sssss1n2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words/sssss1n2"/>
      <lastmod>2026-11-01T20:59:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-without-words/sssss1n2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words/sssss1n2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words/sssss1n2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words/sssss1n2"/>
      <lastmod>2026-11-01T20:59:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-averages-and-the-effects-of-outliers/sssss1nk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-averages-and-the-effects-of-outliers/sssss1nk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-averages-and-the-effects-of-outliers/sssss1nk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-averages-and-the-effects-of-outliers/sssss1nk"/>
      <lastmod>2026-11-01T21:08:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-averages-and-the-effects-of-outliers/sssss1nk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-averages-and-the-effects-of-outliers/sssss1nk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-averages-and-the-effects-of-outliers/sssss1nk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-averages-and-the-effects-of-outliers/sssss1nk"/>
      <lastmod>2026-11-01T21:08:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-dial-skip-counting-by-3/sssss1nz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-dial-skip-counting-by-3/sssss1nz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-dial-skip-counting-by-3/sssss1nz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-dial-skip-counting-by-3/sssss1nz"/>
      <lastmod>2026-11-01T21:28:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-dial-skip-counting-by-3/sssss1nz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-dial-skip-counting-by-3/sssss1nz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-dial-skip-counting-by-3/sssss1nz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-dial-skip-counting-by-3/sssss1nz"/>
      <lastmod>2026-11-01T21:28:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-of-prisms/sssss1n0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-of-prisms/sssss1n0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-of-prisms/sssss1n0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-of-prisms/sssss1n0"/>
      <lastmod>2026-11-01T19:28:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-of-prisms/sssss1n0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-of-prisms/sssss1n0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-of-prisms/sssss1n0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-of-prisms/sssss1n0"/>
      <lastmod>2026-11-01T19:28:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-dynamic-visualization/sssss1nd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-dynamic-visualization/sssss1nd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-graph-dynamic-visualization/sssss1nd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-dynamic-visualization/sssss1nd"/>
      <lastmod>2026-11-01T21:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-sine-graph-dynamic-visualization/sssss1nd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-dynamic-visualization/sssss1nd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-graph-dynamic-visualization/sssss1nd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-dynamic-visualization/sssss1nd"/>
      <lastmod>2026-11-01T21:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-constructions/sssss1nf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-constructions/sssss1nf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-constructions/sssss1nf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-constructions/sssss1nf"/>
      <lastmod>2026-11-02T02:47:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-constructions/sssss1nf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-constructions/sssss1nf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-constructions/sssss1nf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-constructions/sssss1nf"/>
      <lastmod>2026-11-02T02:47:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-rectangles-and-rhombuses/sssss1n8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-rectangles-and-rhombuses/sssss1n8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-rectangles-and-rhombuses/sssss1n8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-rectangles-and-rhombuses/sssss1n8"/>
      <lastmod>2026-11-02T16:30:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-rectangles-and-rhombuses/sssss1n8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-rectangles-and-rhombuses/sssss1n8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-rectangles-and-rhombuses/sssss1n8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-rectangles-and-rhombuses/sssss1n8"/>
      <lastmod>2026-11-02T16:30:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2018-h2-math-vectors-ii-pq7-i-visualization/sssss1nu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2018-h2-math-vectors-ii-pq7-i-visualization/sssss1nu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2018-h2-math-vectors-ii-pq7-i-visualization/sssss1nu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2018-h2-math-vectors-ii-pq7-i-visualization/sssss1nu"/>
      <lastmod>2026-11-02T10:45:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2018-h2-math-vectors-ii-pq7-i-visualization/sssss1nu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2018-h2-math-vectors-ii-pq7-i-visualization/sssss1nu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2018-h2-math-vectors-ii-pq7-i-visualization/sssss1nu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2018-h2-math-vectors-ii-pq7-i-visualization/sssss1nu"/>
      <lastmod>2026-11-02T10:45:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-volume-and-polynomial-functions-a-dynamic-geometry-exploration/sssss1n5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-volume-and-polynomial-functions-a-dynamic-geometry-exploration/sssss1n5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-volume-and-polynomial-functions-a-dynamic-geometry-exploration/sssss1n5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-volume-and-polynomial-functions-a-dynamic-geometry-exploration/sssss1n5"/>
      <lastmod>2026-11-01T21:21:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-volume-and-polynomial-functions-a-dynamic-geometry-exploration/sssss1n5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-volume-and-polynomial-functions-a-dynamic-geometry-exploration/sssss1n5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-volume-and-polynomial-functions-a-dynamic-geometry-exploration/sssss1n5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-volume-and-polynomial-functions-a-dynamic-geometry-exploration/sssss1n5"/>
      <lastmod>2026-11-01T21:21:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-functions-analysis/sssss1nb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-analysis/sssss1nb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-analysis/sssss1nb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-analysis/sssss1nb"/>
      <lastmod>2026-11-02T09:16:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-functions-analysis/sssss1nb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-analysis/sssss1nb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-analysis/sssss1nb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-analysis/sssss1nb"/>
      <lastmod>2026-11-02T09:16:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-ratio-splitting/sssss1n3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-ratio-splitting/sssss1n3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-ratio-splitting/sssss1n3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-ratio-splitting/sssss1n3"/>
      <lastmod>2026-11-02T00:55:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-ratio-splitting/sssss1n3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-ratio-splitting/sssss1n3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-ratio-splitting/sssss1n3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-ratio-splitting/sssss1n3"/>
      <lastmod>2026-11-02T00:55:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersecting-planes-by-phil-tucker/sssss1nq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-planes-by-phil-tucker/sssss1nq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-planes-by-phil-tucker/sssss1nq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-planes-by-phil-tucker/sssss1nq"/>
      <lastmod>2026-11-01T21:54:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersecting-planes-by-phil-tucker/sssss1nq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-planes-by-phil-tucker/sssss1nq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-planes-by-phil-tucker/sssss1nq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-planes-by-phil-tucker/sssss1nq"/>
      <lastmod>2026-11-01T21:54:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-optical-illusion-example/sssss1n1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-optical-illusion-example/sssss1n1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-optical-illusion-example/sssss1n1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-optical-illusion-example/sssss1n1"/>
      <lastmod>2026-11-01T19:37:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-optical-illusion-example/sssss1n1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-optical-illusion-example/sssss1n1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-optical-illusion-example/sssss1n1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-optical-illusion-example/sssss1n1"/>
      <lastmod>2026-11-01T19:37:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-experiment-prism-translation-and-rotation/sssss1nm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-experiment-prism-translation-and-rotation/sssss1nm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-experiment-prism-translation-and-rotation/sssss1nm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-experiment-prism-translation-and-rotation/sssss1nm"/>
      <lastmod>2026-11-02T18:52:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-experiment-prism-translation-and-rotation/sssss1nm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-experiment-prism-translation-and-rotation/sssss1nm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-experiment-prism-translation-and-rotation/sssss1nm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-experiment-prism-translation-and-rotation/sssss1nm"/>
      <lastmod>2026-11-02T18:52:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distinguishing-between-surface-area-and-volume/sssss1nj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distinguishing-between-surface-area-and-volume/sssss1nj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distinguishing-between-surface-area-and-volume/sssss1nj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distinguishing-between-surface-area-and-volume/sssss1nj"/>
      <lastmod>2026-11-02T10:38:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distinguishing-between-surface-area-and-volume/sssss1nj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distinguishing-between-surface-area-and-volume/sssss1nj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distinguishing-between-surface-area-and-volume/sssss1nj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distinguishing-between-surface-area-and-volume/sssss1nj"/>
      <lastmod>2026-11-02T10:38:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-two-vectors/sssss1np</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-two-vectors/sssss1np"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-two-vectors/sssss1np"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-two-vectors/sssss1np"/>
      <lastmod>2026-11-02T09:27:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-two-vectors/sssss1np</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-two-vectors/sssss1np"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-two-vectors/sssss1np"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-two-vectors/sssss1np"/>
      <lastmod>2026-11-02T09:27:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/meaning-of-circumcenter/sssss1nw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/meaning-of-circumcenter/sssss1nw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/meaning-of-circumcenter/sssss1nw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/meaning-of-circumcenter/sssss1nw"/>
      <lastmod>2026-11-01T23:15:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/meaning-of-circumcenter/sssss1nw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/meaning-of-circumcenter/sssss1nw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/meaning-of-circumcenter/sssss1nw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/meaning-of-circumcenter/sssss1nw"/>
      <lastmod>2026-11-01T23:15:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shaded-area-in-a-regular-hexagon-with-an-inscribed-equilateral-triangle/sssss1n6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shaded-area-in-a-regular-hexagon-with-an-inscribed-equilateral-triangle/sssss1n6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shaded-area-in-a-regular-hexagon-with-an-inscribed-equilateral-triangle/sssss1n6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shaded-area-in-a-regular-hexagon-with-an-inscribed-equilateral-triangle/sssss1n6"/>
      <lastmod>2026-11-01T19:05:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shaded-area-in-a-regular-hexagon-with-an-inscribed-equilateral-triangle/sssss1n6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shaded-area-in-a-regular-hexagon-with-an-inscribed-equilateral-triangle/sssss1n6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shaded-area-in-a-regular-hexagon-with-an-inscribed-equilateral-triangle/sssss1n6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shaded-area-in-a-regular-hexagon-with-an-inscribed-equilateral-triangle/sssss1n6"/>
      <lastmod>2026-11-01T19:05:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-day-1/sssss1ng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-day-1/sssss1ng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-day-1/sssss1ng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-day-1/sssss1ng"/>
      <lastmod>2026-11-02T18:06:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-day-1/sssss1ng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-day-1/sssss1ng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-day-1/sssss1ng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-day-1/sssss1ng"/>
      <lastmod>2026-11-02T18:06:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratios-in-right-triangles-by-omirontchik-2/sssss1n9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-in-right-triangles-by-omirontchik-2/sssss1n9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-in-right-triangles-by-omirontchik-2/sssss1n9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-in-right-triangles-by-omirontchik-2/sssss1n9"/>
      <lastmod>2026-11-02T17:44:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratios-in-right-triangles-by-omirontchik-2/sssss1n9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-in-right-triangles-by-omirontchik-2/sssss1n9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-in-right-triangles-by-omirontchik-2/sssss1n9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-in-right-triangles-by-omirontchik-2/sssss1n9"/>
      <lastmod>2026-11-02T17:44:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-construction-by-jerry-yang/sssss1ne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-jerry-yang/sssss1ne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-by-jerry-yang/sssss1ne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-jerry-yang/sssss1ne"/>
      <lastmod>2026-11-02T16:56:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-construction-by-jerry-yang/sssss1ne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-jerry-yang/sssss1ne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-by-jerry-yang/sssss1ne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-jerry-yang/sssss1ne"/>
      <lastmod>2026-11-02T16:56:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-construction/sssss1nv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-construction/sssss1nv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-construction/sssss1nv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-construction/sssss1nv"/>
      <lastmod>2026-11-02T17:35:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-construction/sssss1nv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-construction/sssss1nv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-construction/sssss1nv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-construction/sssss1nv"/>
      <lastmod>2026-11-02T17:35:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphs-of-first-derivatives/sssss1n4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-first-derivatives/sssss1n4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-first-derivatives/sssss1n4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-first-derivatives/sssss1n4"/>
      <lastmod>2026-11-02T02:58:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphs-of-first-derivatives/sssss1n4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-first-derivatives/sssss1n4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-first-derivatives/sssss1n4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-first-derivatives/sssss1n4"/>
      <lastmod>2026-11-02T02:58:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curved-surface-area-of-cones/sssss1nl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones/sssss1nl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curved-surface-area-of-cones/sssss1nl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones/sssss1nl"/>
      <lastmod>2026-11-01T21:40:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curved-surface-area-of-cones/sssss1nl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones/sssss1nl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curved-surface-area-of-cones/sssss1nl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones/sssss1nl"/>
      <lastmod>2026-11-01T21:40:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/write-the-equation-of-a-line-given-a-graph-y-intercept-is-an-integer/sssss1ny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-the-equation-of-a-line-given-a-graph-y-intercept-is-an-integer/sssss1ny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-the-equation-of-a-line-given-a-graph-y-intercept-is-an-integer/sssss1ny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-the-equation-of-a-line-given-a-graph-y-intercept-is-an-integer/sssss1ny"/>
      <lastmod>2026-11-01T23:43:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/write-the-equation-of-a-line-given-a-graph-y-intercept-is-an-integer/sssss1ny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-the-equation-of-a-line-given-a-graph-y-intercept-is-an-integer/sssss1ny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-the-equation-of-a-line-given-a-graph-y-intercept-is-an-integer/sssss1ny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-the-equation-of-a-line-given-a-graph-y-intercept-is-an-integer/sssss1ny"/>
      <lastmod>2026-11-01T23:43:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-y-sin-x/sssss1na</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-y-sin-x/sssss1na"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-y-sin-x/sssss1na"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-y-sin-x/sssss1na"/>
      <lastmod>2026-11-02T17:49:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-y-sin-x/sssss1na</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-y-sin-x/sssss1na"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-y-sin-x/sssss1na"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-y-sin-x/sssss1na"/>
      <lastmod>2026-11-02T17:49:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-polygons/sssss1nc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-polygons/sssss1nc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-polygons/sssss1nc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-polygons/sssss1nc"/>
      <lastmod>2026-11-01T23:57:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-polygons/sssss1nc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-polygons/sssss1nc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-polygons/sssss1nc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-polygons/sssss1nc"/>
      <lastmod>2026-11-01T23:57:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/baravelle-spiral-printing/sssss1nr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baravelle-spiral-printing/sssss1nr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baravelle-spiral-printing/sssss1nr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baravelle-spiral-printing/sssss1nr"/>
      <lastmod>2026-11-02T02:55:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/baravelle-spiral-printing/sssss1nr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baravelle-spiral-printing/sssss1nr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baravelle-spiral-printing/sssss1nr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baravelle-spiral-printing/sssss1nr"/>
      <lastmod>2026-11-02T02:55:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-hyperboloid-and-sphere/sssss1nh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-hyperboloid-and-sphere/sssss1nh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-hyperboloid-and-sphere/sssss1nh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-hyperboloid-and-sphere/sssss1nh"/>
      <lastmod>2026-11-01T23:41:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-hyperboloid-and-sphere/sssss1nh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-hyperboloid-and-sphere/sssss1nh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-hyperboloid-and-sphere/sssss1nh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-hyperboloid-and-sphere/sssss1nh"/>
      <lastmod>2026-11-01T23:41:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/smiley-construction/sssss1nt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smiley-construction/sssss1nt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smiley-construction/sssss1nt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smiley-construction/sssss1nt"/>
      <lastmod>2026-11-01T20:48:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/smiley-construction/sssss1nt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smiley-construction/sssss1nt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smiley-construction/sssss1nt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smiley-construction/sssss1nt"/>
      <lastmod>2026-11-01T20:48:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-of-tetrahedron/sssss1nx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-tetrahedron/sssss1nx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-tetrahedron/sssss1nx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-tetrahedron/sssss1nx"/>
      <lastmod>2026-11-01T21:07:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-of-tetrahedron/sssss1nx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-tetrahedron/sssss1nx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-tetrahedron/sssss1nx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-tetrahedron/sssss1nx"/>
      <lastmod>2026-11-01T21:07:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometry-construction-example-allen-ray/sssss1ni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-construction-example-allen-ray/sssss1ni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometry-construction-example-allen-ray/sssss1ni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometry-construction-example-allen-ray/sssss1ni"/>
      <lastmod>2026-11-02T00:33:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometry-construction-example-allen-ray/sssss1ni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-construction-example-allen-ray/sssss1ni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometry-construction-example-allen-ray/sssss1ni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometry-construction-example-allen-ray/sssss1ni"/>
      <lastmod>2026-11-02T00:33:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/writing-linear-equations-given-2-points/sssss1no</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-linear-equations-given-2-points/sssss1no"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-linear-equations-given-2-points/sssss1no"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-linear-equations-given-2-points/sssss1no"/>
      <lastmod>2026-11-02T16:55:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/writing-linear-equations-given-2-points/sssss1no</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-linear-equations-given-2-points/sssss1no"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-linear-equations-given-2-points/sssss1no"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-linear-equations-given-2-points/sssss1no"/>
      <lastmod>2026-11-02T16:55:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-and-perimeter-of-circle-parts/sssss12s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-circle-parts/sssss12s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-circle-parts/sssss12s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-circle-parts/sssss12s"/>
      <lastmod>2026-11-02T16:37:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-and-perimeter-of-circle-parts/sssss12s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-circle-parts/sssss12s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-circle-parts/sssss12s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-circle-parts/sssss12s"/>
      <lastmod>2026-11-02T16:37:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-diagonals-properties/sssss127</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-diagonals-properties/sssss127"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-diagonals-properties/sssss127"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-diagonals-properties/sssss127"/>
      <lastmod>2026-11-02T11:03:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-diagonals-properties/sssss127</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-diagonals-properties/sssss127"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-diagonals-properties/sssss127"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-diagonals-properties/sssss127"/>
      <lastmod>2026-11-02T11:03:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-isosceles-and-equilateral-triangles/sssss12n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-isosceles-and-equilateral-triangles/sssss12n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-isosceles-and-equilateral-triangles/sssss12n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-isosceles-and-equilateral-triangles/sssss12n"/>
      <lastmod>2026-11-02T16:31:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-isosceles-and-equilateral-triangles/sssss12n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-isosceles-and-equilateral-triangles/sssss12n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-isosceles-and-equilateral-triangles/sssss12n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-isosceles-and-equilateral-triangles/sssss12n"/>
      <lastmod>2026-11-02T16:31:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-square-roots/sssss122</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-square-roots/sssss122"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-square-roots/sssss122"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-square-roots/sssss122"/>
      <lastmod>2026-11-01T20:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-square-roots/sssss122</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-square-roots/sssss122"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-square-roots/sssss122"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-square-roots/sssss122"/>
      <lastmod>2026-11-01T20:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/game-7-transformations-and-vectors/sssss12k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/game-7-transformations-and-vectors/sssss12k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/game-7-transformations-and-vectors/sssss12k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/game-7-transformations-and-vectors/sssss12k"/>
      <lastmod>2026-11-01T21:57:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/game-7-transformations-and-vectors/sssss12k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/game-7-transformations-and-vectors/sssss12k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/game-7-transformations-and-vectors/sssss12k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/game-7-transformations-and-vectors/sssss12k"/>
      <lastmod>2026-11-01T21:57:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-square-pyramid/sssss12z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-square-pyramid/sssss12z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-square-pyramid/sssss12z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-square-pyramid/sssss12z"/>
      <lastmod>2026-11-02T00:49:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-square-pyramid/sssss12z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-square-pyramid/sssss12z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-square-pyramid/sssss12z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-square-pyramid/sssss12z"/>
      <lastmod>2026-11-02T00:49:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-volume-of-a-rectangular-prism-lp-volume-balok-geogebra-demo/sssss120</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-volume-of-a-rectangular-prism-lp-volume-balok-geogebra-demo/sssss120"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-volume-of-a-rectangular-prism-lp-volume-balok-geogebra-demo/sssss120"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-volume-of-a-rectangular-prism-lp-volume-balok-geogebra-demo/sssss120"/>
      <lastmod>2026-11-02T18:12:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-volume-of-a-rectangular-prism-lp-volume-balok-geogebra-demo/sssss120</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-volume-of-a-rectangular-prism-lp-volume-balok-geogebra-demo/sssss120"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-volume-of-a-rectangular-prism-lp-volume-balok-geogebra-demo/sssss120"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-volume-of-a-rectangular-prism-lp-volume-balok-geogebra-demo/sssss120"/>
      <lastmod>2026-11-02T18:12:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dyme-2-5-dimensional-geometric-construction/sssss12d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dyme-2-5-dimensional-geometric-construction/sssss12d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dyme-2-5-dimensional-geometric-construction/sssss12d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dyme-2-5-dimensional-geometric-construction/sssss12d"/>
      <lastmod>2026-11-01T23:13:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dyme-2-5-dimensional-geometric-construction/sssss12d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dyme-2-5-dimensional-geometric-construction/sssss12d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dyme-2-5-dimensional-geometric-construction/sssss12d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dyme-2-5-dimensional-geometric-construction/sssss12d"/>
      <lastmod>2026-11-01T23:13:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/screwed-bisection-of-a-cube/sssss12f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/screwed-bisection-of-a-cube/sssss12f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/screwed-bisection-of-a-cube/sssss12f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/screwed-bisection-of-a-cube/sssss12f"/>
      <lastmod>2026-11-01T23:56:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/screwed-bisection-of-a-cube/sssss12f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/screwed-bisection-of-a-cube/sssss12f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/screwed-bisection-of-a-cube/sssss12f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/screwed-bisection-of-a-cube/sssss12f"/>
      <lastmod>2026-11-01T23:56:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bisecting-an-angle-construction/sssss128</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisecting-an-angle-construction/sssss128"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisecting-an-angle-construction/sssss128"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisecting-an-angle-construction/sssss128"/>
      <lastmod>2026-11-02T16:48:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bisecting-an-angle-construction/sssss128</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisecting-an-angle-construction/sssss128"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisecting-an-angle-construction/sssss128"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisecting-an-angle-construction/sssss128"/>
      <lastmod>2026-11-02T16:48:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-coordinates-introduction/sssss12u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-introduction/sssss12u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-introduction/sssss12u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-introduction/sssss12u"/>
      <lastmod>2026-11-01T21:26:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-coordinates-introduction/sssss12u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-introduction/sssss12u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-introduction/sssss12u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-introduction/sssss12u"/>
      <lastmod>2026-11-01T21:26:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilating-a-line-by-ian-callon/sssss125</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilating-a-line-by-ian-callon/sssss125"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilating-a-line-by-ian-callon/sssss125"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilating-a-line-by-ian-callon/sssss125"/>
      <lastmod>2026-11-02T17:00:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilating-a-line-by-ian-callon/sssss125</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilating-a-line-by-ian-callon/sssss125"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilating-a-line-by-ian-callon/sssss125"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilating-a-line-by-ian-callon/sssss125"/>
      <lastmod>2026-11-02T17:00:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/entering-algebraic-input-in-the-cas-view/sssss12b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/entering-algebraic-input-in-the-cas-view/sssss12b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/entering-algebraic-input-in-the-cas-view/sssss12b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/entering-algebraic-input-in-the-cas-view/sssss12b"/>
      <lastmod>2026-11-01T22:01:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/entering-algebraic-input-in-the-cas-view/sssss12b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/entering-algebraic-input-in-the-cas-view/sssss12b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/entering-algebraic-input-in-the-cas-view/sssss12b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/entering-algebraic-input-in-the-cas-view/sssss12b"/>
      <lastmod>2026-11-01T22:01:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-interior-angle-theorem-proof/sssss123</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-interior-angle-theorem-proof/sssss123"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-interior-angle-theorem-proof/sssss123"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-interior-angle-theorem-proof/sssss123"/>
      <lastmod>2026-11-02T00:37:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-interior-angle-theorem-proof/sssss123</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-interior-angle-theorem-proof/sssss123"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-interior-angle-theorem-proof/sssss123"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-interior-angle-theorem-proof/sssss123"/>
      <lastmod>2026-11-02T00:37:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions/sssss12q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions/sssss12q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-and-negative-binomial-distributions/sssss12q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions/sssss12q"/>
      <lastmod>2026-11-02T09:38:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-and-negative-binomial-distributions/sssss12q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions/sssss12q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-and-negative-binomial-distributions/sssss12q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions/sssss12q"/>
      <lastmod>2026-11-02T09:38:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bisect-an-angle/sssss121</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisect-an-angle/sssss121"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisect-an-angle/sssss121"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisect-an-angle/sssss121"/>
      <lastmod>2026-11-02T16:29:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bisect-an-angle/sssss121</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisect-an-angle/sssss121"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisect-an-angle/sssss121"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisect-an-angle/sssss121"/>
      <lastmod>2026-11-02T16:29:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-law-exploration/sssss12m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-law-exploration/sssss12m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-law-exploration/sssss12m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-law-exploration/sssss12m"/>
      <lastmod>2026-11-01T23:15:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-law-exploration/sssss12m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-law-exploration/sssss12m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-law-exploration/sssss12m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-law-exploration/sssss12m"/>
      <lastmod>2026-11-01T23:15:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-geometric-pattern-symmetry-demo/sssss12j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-symmetry-demo/sssss12j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-pattern-symmetry-demo/sssss12j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-symmetry-demo/sssss12j"/>
      <lastmod>2026-11-01T21:05:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-geometric-pattern-symmetry-demo/sssss12j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-symmetry-demo/sssss12j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-pattern-symmetry-demo/sssss12j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-symmetry-demo/sssss12j"/>
      <lastmod>2026-11-01T21:05:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-surfaces/sssss12p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-surfaces/sssss12p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-surfaces/sssss12p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-surfaces/sssss12p"/>
      <lastmod>2026-11-02T02:26:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-surfaces/sssss12p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-surfaces/sssss12p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-surfaces/sssss12p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-surfaces/sssss12p"/>
      <lastmod>2026-11-02T02:26:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-finding-exact-trig-ratios/sssss12w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-finding-exact-trig-ratios/sssss12w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-finding-exact-trig-ratios/sssss12w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-finding-exact-trig-ratios/sssss12w"/>
      <lastmod>2026-11-02T17:36:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-finding-exact-trig-ratios/sssss12w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-finding-exact-trig-ratios/sssss12w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-finding-exact-trig-ratios/sssss12w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-finding-exact-trig-ratios/sssss12w"/>
      <lastmod>2026-11-02T17:36:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-pictures-task/sssss126</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-pictures-task/sssss126"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-pictures-task/sssss126"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-pictures-task/sssss126"/>
      <lastmod>2026-11-02T18:09:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-pictures-task/sssss126</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-pictures-task/sssss126"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-pictures-task/sssss126"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-pictures-task/sssss126"/>
      <lastmod>2026-11-02T18:09:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-fidget-spinner/sssss12g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-fidget-spinner/sssss12g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-fidget-spinner/sssss12g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-fidget-spinner/sssss12g"/>
      <lastmod>2026-11-02T17:06:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-fidget-spinner/sssss12g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-fidget-spinner/sssss12g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-fidget-spinner/sssss12g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-fidget-spinner/sssss12g"/>
      <lastmod>2026-11-02T17:06:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-of-trigonometric-functions/sssss129</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-of-trigonometric-functions/sssss129"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-of-trigonometric-functions/sssss129"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-of-trigonometric-functions/sssss129"/>
      <lastmod>2026-11-02T17:06:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-of-trigonometric-functions/sssss129</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-of-trigonometric-functions/sssss129"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-of-trigonometric-functions/sssss129"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-of-trigonometric-functions/sssss129"/>
      <lastmod>2026-11-02T17:06:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-visualization-of-volumes-of-revolution/sssss12e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-volumes-of-revolution/sssss12e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-visualization-of-volumes-of-revolution/sssss12e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-volumes-of-revolution/sssss12e"/>
      <lastmod>2026-11-01T22:00:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-visualization-of-volumes-of-revolution/sssss12e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-volumes-of-revolution/sssss12e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-visualization-of-volumes-of-revolution/sssss12e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-volumes-of-revolution/sssss12e"/>
      <lastmod>2026-11-01T22:00:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vlad-9d-parabola-in-art/sssss12v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vlad-9d-parabola-in-art/sssss12v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vlad-9d-parabola-in-art/sssss12v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vlad-9d-parabola-in-art/sssss12v"/>
      <lastmod>2026-11-01T21:55:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vlad-9d-parabola-in-art/sssss12v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vlad-9d-parabola-in-art/sssss12v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vlad-9d-parabola-in-art/sssss12v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vlad-9d-parabola-in-art/sssss12v"/>
      <lastmod>2026-11-01T21:55:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-angle/sssss124</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-angle/sssss124"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-angle/sssss124"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-angle/sssss124"/>
      <lastmod>2026-11-02T17:52:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-angle/sssss124</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-angle/sssss124"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-angle/sssss124"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-angle/sssss124"/>
      <lastmod>2026-11-02T17:52:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/norwegian-youth-iq-measurement-analysis/sssss12l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/norwegian-youth-iq-measurement-analysis/sssss12l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/norwegian-youth-iq-measurement-analysis/sssss12l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/norwegian-youth-iq-measurement-analysis/sssss12l"/>
      <lastmod>2026-11-02T02:18:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/norwegian-youth-iq-measurement-analysis/sssss12l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/norwegian-youth-iq-measurement-analysis/sssss12l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/norwegian-youth-iq-measurement-analysis/sssss12l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/norwegian-youth-iq-measurement-analysis/sssss12l"/>
      <lastmod>2026-11-02T02:18:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-functions-by-geogebra-classroom-activities/sssss12y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-functions-by-geogebra-classroom-activities/sssss12y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-functions-by-geogebra-classroom-activities/sssss12y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-functions-by-geogebra-classroom-activities/sssss12y"/>
      <lastmod>2026-11-01T22:55:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-functions-by-geogebra-classroom-activities/sssss12y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-functions-by-geogebra-classroom-activities/sssss12y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-functions-by-geogebra-classroom-activities/sssss12y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-functions-by-geogebra-classroom-activities/sssss12y"/>
      <lastmod>2026-11-01T22:55:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-triangles/sssss12a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-triangles/sssss12a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-triangles/sssss12a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-triangles/sssss12a"/>
      <lastmod>2026-11-01T21:56:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-triangles/sssss12a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-triangles/sssss12a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-triangles/sssss12a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-triangles/sssss12a"/>
      <lastmod>2026-11-01T21:56:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-two-dice-rolls/sssss12c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-two-dice-rolls/sssss12c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-two-dice-rolls/sssss12c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-two-dice-rolls/sssss12c"/>
      <lastmod>2026-11-02T00:44:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-two-dice-rolls/sssss12c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-two-dice-rolls/sssss12c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-two-dice-rolls/sssss12c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-two-dice-rolls/sssss12c"/>
      <lastmod>2026-11-02T00:44:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-a-biquadratic-equation-with-a-parabola/sssss12r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-a-biquadratic-equation-with-a-parabola/sssss12r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-a-biquadratic-equation-with-a-parabola/sssss12r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-a-biquadratic-equation-with-a-parabola/sssss12r"/>
      <lastmod>2026-11-01T23:19:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-a-biquadratic-equation-with-a-parabola/sssss12r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-a-biquadratic-equation-with-a-parabola/sssss12r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-a-biquadratic-equation-with-a-parabola/sssss12r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-a-biquadratic-equation-with-a-parabola/sssss12r"/>
      <lastmod>2026-11-01T23:19:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cartesian-coordinates-concept-demo/sssss12h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cartesian-coordinates-concept-demo/sssss12h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cartesian-coordinates-concept-demo/sssss12h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cartesian-coordinates-concept-demo/sssss12h"/>
      <lastmod>2026-11-02T17:54:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cartesian-coordinates-concept-demo/sssss12h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cartesian-coordinates-concept-demo/sssss12h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cartesian-coordinates-concept-demo/sssss12h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cartesian-coordinates-concept-demo/sssss12h"/>
      <lastmod>2026-11-02T17:54:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinate-plane-practice-8-1/sssss12t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-plane-practice-8-1/sssss12t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-plane-practice-8-1/sssss12t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-plane-practice-8-1/sssss12t"/>
      <lastmod>2026-11-01T19:06:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinate-plane-practice-8-1/sssss12t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-plane-practice-8-1/sssss12t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-plane-practice-8-1/sssss12t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-plane-practice-8-1/sssss12t"/>
      <lastmod>2026-11-01T19:06:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-construction-example/sssss12x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-construction-example/sssss12x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-construction-example/sssss12x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-construction-example/sssss12x"/>
      <lastmod>2026-11-02T13:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-construction-example/sssss12x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-construction-example/sssss12x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-construction-example/sssss12x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-construction-example/sssss12x"/>
      <lastmod>2026-11-02T13:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-dynamic-demonstration/sssss12i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-dynamic-demonstration/sssss12i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-dynamic-demonstration/sssss12i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-dynamic-demonstration/sssss12i"/>
      <lastmod>2026-11-01T23:35:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-dynamic-demonstration/sssss12i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-dynamic-demonstration/sssss12i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-dynamic-demonstration/sssss12i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-dynamic-demonstration/sssss12i"/>
      <lastmod>2026-11-01T23:35:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directed-numbers/sssss12o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directed-numbers/sssss12o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directed-numbers/sssss12o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directed-numbers/sssss12o"/>
      <lastmod>2026-11-02T17:45:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directed-numbers/sssss12o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directed-numbers/sssss12o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directed-numbers/sssss12o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directed-numbers/sssss12o"/>
      <lastmod>2026-11-02T17:45:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-gadget-common-denominators/sssss1ks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-gadget-common-denominators/sssss1ks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-gadget-common-denominators/sssss1ks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-gadget-common-denominators/sssss1ks"/>
      <lastmod>2026-11-02T13:06:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-gadget-common-denominators/sssss1ks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-gadget-common-denominators/sssss1ks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-gadget-common-denominators/sssss1ks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-gadget-common-denominators/sssss1ks"/>
      <lastmod>2026-11-02T13:06:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-model-and-factored-form/sssss1k7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-model-and-factored-form/sssss1k7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-model-and-factored-form/sssss1k7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-model-and-factored-form/sssss1k7"/>
      <lastmod>2026-11-01T23:56:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-model-and-factored-form/sssss1k7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-model-and-factored-form/sssss1k7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-model-and-factored-form/sssss1k7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-model-and-factored-form/sssss1k7"/>
      <lastmod>2026-11-01T23:56:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformation-exploration/sssss1kn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformation-exploration/sssss1kn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformation-exploration/sssss1kn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformation-exploration/sssss1kn"/>
      <lastmod>2026-11-01T23:38:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformation-exploration/sssss1kn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformation-exploration/sssss1kn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformation-exploration/sssss1kn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformation-exploration/sssss1kn"/>
      <lastmod>2026-11-01T23:38:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us-2/sssss1k2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us-2/sssss1k2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us-2/sssss1k2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us-2/sssss1k2"/>
      <lastmod>2026-11-02T16:31:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us-2/sssss1k2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us-2/sssss1k2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us-2/sssss1k2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us-2/sssss1k2"/>
      <lastmod>2026-11-02T16:31:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inequalities-intersection/sssss1kk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-intersection/sssss1kk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-intersection/sssss1kk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-intersection/sssss1kk"/>
      <lastmod>2026-11-02T17:36:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inequalities-intersection/sssss1kk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-intersection/sssss1kk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-intersection/sssss1kk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-intersection/sssss1kk"/>
      <lastmod>2026-11-02T17:36:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelepiped-volume-experiment/sssss1kz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelepiped-volume-experiment/sssss1kz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelepiped-volume-experiment/sssss1kz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelepiped-volume-experiment/sssss1kz"/>
      <lastmod>2026-11-02T15:11:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelepiped-volume-experiment/sssss1kz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelepiped-volume-experiment/sssss1kz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelepiped-volume-experiment/sssss1kz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelepiped-volume-experiment/sssss1kz"/>
      <lastmod>2026-11-02T15:11:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lz-8-7-8-2-comparing-large-numbers-interactive-size-comparison-with-geometric-v/sssss1k0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lz-8-7-8-2-comparing-large-numbers-interactive-size-comparison-with-geometric-v/sssss1k0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lz-8-7-8-2-comparing-large-numbers-interactive-size-comparison-with-geometric-v/sssss1k0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lz-8-7-8-2-comparing-large-numbers-interactive-size-comparison-with-geometric-v/sssss1k0"/>
      <lastmod>2026-11-02T03:18:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lz-8-7-8-2-comparing-large-numbers-interactive-size-comparison-with-geometric-v/sssss1k0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lz-8-7-8-2-comparing-large-numbers-interactive-size-comparison-with-geometric-v/sssss1k0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lz-8-7-8-2-comparing-large-numbers-interactive-size-comparison-with-geometric-v/sssss1k0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lz-8-7-8-2-comparing-large-numbers-interactive-size-comparison-with-geometric-v/sssss1k0"/>
      <lastmod>2026-11-02T03:18:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-with-rectangular-cross-sections/sssss1kd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-with-rectangular-cross-sections/sssss1kd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-with-rectangular-cross-sections/sssss1kd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-with-rectangular-cross-sections/sssss1kd"/>
      <lastmod>2026-11-01T22:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-with-rectangular-cross-sections/sssss1kd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-with-rectangular-cross-sections/sssss1kd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-with-rectangular-cross-sections/sssss1kd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-with-rectangular-cross-sections/sssss1kd"/>
      <lastmod>2026-11-01T22:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-pattern-construction/sssss1kf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-pattern-construction/sssss1kf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-pattern-construction/sssss1kf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-pattern-construction/sssss1kf"/>
      <lastmod>2026-11-02T18:22:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-pattern-construction/sssss1kf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-pattern-construction/sssss1kf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-pattern-construction/sssss1kf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-pattern-construction/sssss1kf"/>
      <lastmod>2026-11-02T18:22:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prime-number-sieve-patterns-2-visualizing-large-number-sieve-process/sssss1k8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prime-number-sieve-patterns-2-visualizing-large-number-sieve-process/sssss1k8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prime-number-sieve-patterns-2-visualizing-large-number-sieve-process/sssss1k8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prime-number-sieve-patterns-2-visualizing-large-number-sieve-process/sssss1k8"/>
      <lastmod>2026-11-01T21:46:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prime-number-sieve-patterns-2-visualizing-large-number-sieve-process/sssss1k8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prime-number-sieve-patterns-2-visualizing-large-number-sieve-process/sssss1k8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prime-number-sieve-patterns-2-visualizing-large-number-sieve-process/sssss1k8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prime-number-sieve-patterns-2-visualizing-large-number-sieve-process/sssss1k8"/>
      <lastmod>2026-11-01T21:46:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/julia-set-fractal-c-1-0i-visualization-in-complex-plane/sssss1ku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/julia-set-fractal-c-1-0i-visualization-in-complex-plane/sssss1ku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/julia-set-fractal-c-1-0i-visualization-in-complex-plane/sssss1ku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/julia-set-fractal-c-1-0i-visualization-in-complex-plane/sssss1ku"/>
      <lastmod>2026-11-01T21:14:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/julia-set-fractal-c-1-0i-visualization-in-complex-plane/sssss1ku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/julia-set-fractal-c-1-0i-visualization-in-complex-plane/sssss1ku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/julia-set-fractal-c-1-0i-visualization-in-complex-plane/sssss1ku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/julia-set-fractal-c-1-0i-visualization-in-complex-plane/sssss1ku"/>
      <lastmod>2026-11-01T21:14:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-number-line/sssss1k5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-number-line/sssss1k5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-number-line/sssss1k5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-number-line/sssss1k5"/>
      <lastmod>2026-11-02T18:45:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-number-line/sssss1k5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-number-line/sssss1k5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-number-line/sssss1k5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-number-line/sssss1k5"/>
      <lastmod>2026-11-02T18:45:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/icosidodecahedron-construction-in-geogebra-30-vertices/sssss1kb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosidodecahedron-construction-in-geogebra-30-vertices/sssss1kb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosidodecahedron-construction-in-geogebra-30-vertices/sssss1kb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosidodecahedron-construction-in-geogebra-30-vertices/sssss1kb"/>
      <lastmod>2026-11-01T21:35:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/icosidodecahedron-construction-in-geogebra-30-vertices/sssss1kb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosidodecahedron-construction-in-geogebra-30-vertices/sssss1kb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosidodecahedron-construction-in-geogebra-30-vertices/sssss1kb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosidodecahedron-construction-in-geogebra-30-vertices/sssss1kb"/>
      <lastmod>2026-11-01T21:35:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/checking-solutions-to-equations/sssss1k3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/checking-solutions-to-equations/sssss1k3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/checking-solutions-to-equations/sssss1k3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/checking-solutions-to-equations/sssss1k3"/>
      <lastmod>2026-11-01T19:37:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/checking-solutions-to-equations/sssss1k3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/checking-solutions-to-equations/sssss1k3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/checking-solutions-to-equations/sssss1k3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/checking-solutions-to-equations/sssss1k3"/>
      <lastmod>2026-11-01T19:37:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/position-speed-and-direction-im-7-5-8-lesson/sssss1kq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/position-speed-and-direction-im-7-5-8-lesson/sssss1kq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/position-speed-and-direction-im-7-5-8-lesson/sssss1kq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/position-speed-and-direction-im-7-5-8-lesson/sssss1kq"/>
      <lastmod>2026-11-02T10:36:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/position-speed-and-direction-im-7-5-8-lesson/sssss1kq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/position-speed-and-direction-im-7-5-8-lesson/sssss1kq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/position-speed-and-direction-im-7-5-8-lesson/sssss1kq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/position-speed-and-direction-im-7-5-8-lesson/sssss1kq"/>
      <lastmod>2026-11-02T10:36:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/imam-s-drum-pattern/sssss1k1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/imam-s-drum-pattern/sssss1k1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/imam-s-drum-pattern/sssss1k1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/imam-s-drum-pattern/sssss1k1"/>
      <lastmod>2026-11-01T21:00:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/imam-s-drum-pattern/sssss1k1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/imam-s-drum-pattern/sssss1k1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/imam-s-drum-pattern/sssss1k1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/imam-s-drum-pattern/sssss1k1"/>
      <lastmod>2026-11-01T21:00:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/root-rectangles-and-tetrahedra/sssss1km</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangles-and-tetrahedra/sssss1km"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangles-and-tetrahedra/sssss1km"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangles-and-tetrahedra/sssss1km"/>
      <lastmod>2026-11-02T02:26:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/root-rectangles-and-tetrahedra/sssss1km</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangles-and-tetrahedra/sssss1km"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangles-and-tetrahedra/sssss1km"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangles-and-tetrahedra/sssss1km"/>
      <lastmod>2026-11-02T02:26:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-cross-sections-of-a-triangular-pyramid/sssss1kj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-cross-sections-of-a-triangular-pyramid/sssss1kj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-cross-sections-of-a-triangular-pyramid/sssss1kj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-cross-sections-of-a-triangular-pyramid/sssss1kj"/>
      <lastmod>2026-11-01T19:15:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-cross-sections-of-a-triangular-pyramid/sssss1kj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-cross-sections-of-a-triangular-pyramid/sssss1kj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-cross-sections-of-a-triangular-pyramid/sssss1kj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-cross-sections-of-a-triangular-pyramid/sssss1kj"/>
      <lastmod>2026-11-01T19:15:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-of-two-sine-functions/sssss1kp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-two-sine-functions/sssss1kp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-two-sine-functions/sssss1kp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-two-sine-functions/sssss1kp"/>
      <lastmod>2026-11-01T21:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-of-two-sine-functions/sssss1kp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-two-sine-functions/sssss1kp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-two-sine-functions/sssss1kp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-two-sine-functions/sssss1kp"/>
      <lastmod>2026-11-01T21:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-activity-1/sssss1kw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-activity-1/sssss1kw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-activity-1/sssss1kw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-activity-1/sssss1kw"/>
      <lastmod>2026-11-02T17:04:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-activity-1/sssss1kw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-activity-1/sssss1kw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-activity-1/sssss1kw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-activity-1/sssss1kw"/>
      <lastmod>2026-11-02T17:04:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-division-a-b-visualization/sssss1k6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-a-b-visualization/sssss1k6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-a-b-visualization/sssss1k6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-a-b-visualization/sssss1k6"/>
      <lastmod>2026-11-01T21:58:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-division-a-b-visualization/sssss1k6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-a-b-visualization/sssss1k6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-a-b-visualization/sssss1k6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-a-b-visualization/sssss1k6"/>
      <lastmod>2026-11-01T21:58:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/south-africa-math-example/sssss1kg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/south-africa-math-example/sssss1kg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/south-africa-math-example/sssss1kg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/south-africa-math-example/sssss1kg"/>
      <lastmod>2026-11-01T20:45:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/south-africa-math-example/sssss1kg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/south-africa-math-example/sssss1kg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/south-africa-math-example/sssss1kg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/south-africa-math-example/sssss1kg"/>
      <lastmod>2026-11-01T20:45:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-transformations-in-3d-visualizing-linear-transformations-on-a-cube/sssss1k9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-transformations-in-3d-visualizing-linear-transformations-on-a-cube/sssss1k9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-transformations-in-3d-visualizing-linear-transformations-on-a-cube/sssss1k9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-transformations-in-3d-visualizing-linear-transformations-on-a-cube/sssss1k9"/>
      <lastmod>2026-11-02T07:05:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-transformations-in-3d-visualizing-linear-transformations-on-a-cube/sssss1k9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-transformations-in-3d-visualizing-linear-transformations-on-a-cube/sssss1k9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-transformations-in-3d-visualizing-linear-transformations-on-a-cube/sssss1k9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-transformations-in-3d-visualizing-linear-transformations-on-a-cube/sssss1k9"/>
      <lastmod>2026-11-02T07:05:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scalar-projection-onto-component-unit-vectors/sssss1ke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalar-projection-onto-component-unit-vectors/sssss1ke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalar-projection-onto-component-unit-vectors/sssss1ke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalar-projection-onto-component-unit-vectors/sssss1ke"/>
      <lastmod>2026-11-01T23:24:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scalar-projection-onto-component-unit-vectors/sssss1ke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalar-projection-onto-component-unit-vectors/sssss1ke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalar-projection-onto-component-unit-vectors/sssss1ke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalar-projection-onto-component-unit-vectors/sssss1ke"/>
      <lastmod>2026-11-01T23:24:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/red-and-blue-areas-of-polygons/sssss1kv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/red-and-blue-areas-of-polygons/sssss1kv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/red-and-blue-areas-of-polygons/sssss1kv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/red-and-blue-areas-of-polygons/sssss1kv"/>
      <lastmod>2026-11-02T00:18:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/red-and-blue-areas-of-polygons/sssss1kv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/red-and-blue-areas-of-polygons/sssss1kv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/red-and-blue-areas-of-polygons/sssss1kv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/red-and-blue-areas-of-polygons/sssss1kv"/>
      <lastmod>2026-11-02T00:18:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-cosine-angle-sum-proof/sssss1k4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-angle-sum-proof/sssss1k4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-cosine-angle-sum-proof/sssss1k4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-cosine-angle-sum-proof/sssss1k4"/>
      <lastmod>2026-11-02T02:18:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-cosine-angle-sum-proof/sssss1k4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-angle-sum-proof/sssss1k4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-cosine-angle-sum-proof/sssss1k4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-cosine-angle-sum-proof/sssss1k4"/>
      <lastmod>2026-11-02T02:18:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosecant-graph-tracing-on-unit-circle/sssss1kl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosecant-graph-tracing-on-unit-circle/sssss1kl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosecant-graph-tracing-on-unit-circle/sssss1kl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosecant-graph-tracing-on-unit-circle/sssss1kl"/>
      <lastmod>2026-11-02T00:22:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosecant-graph-tracing-on-unit-circle/sssss1kl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosecant-graph-tracing-on-unit-circle/sssss1kl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosecant-graph-tracing-on-unit-circle/sssss1kl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosecant-graph-tracing-on-unit-circle/sssss1kl"/>
      <lastmod>2026-11-02T00:22:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-exploration/sssss1ky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-exploration/sssss1ky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-exploration/sssss1ky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-exploration/sssss1ky"/>
      <lastmod>2026-11-02T16:54:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-exploration/sssss1ky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-exploration/sssss1ky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-exploration/sssss1ky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-exploration/sssss1ky"/>
      <lastmod>2026-11-02T16:54:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gear-ratio-demonstration/sssss1ka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gear-ratio-demonstration/sssss1ka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gear-ratio-demonstration/sssss1ka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gear-ratio-demonstration/sssss1ka"/>
      <lastmod>2026-11-02T02:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gear-ratio-demonstration/sssss1ka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gear-ratio-demonstration/sssss1ka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gear-ratio-demonstration/sssss1ka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gear-ratio-demonstration/sssss1ka"/>
      <lastmod>2026-11-02T02:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/check-if-it-s-an-angle-bisector/sssss1kc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-if-it-s-an-angle-bisector/sssss1kc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-if-it-s-an-angle-bisector/sssss1kc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-if-it-s-an-angle-bisector/sssss1kc"/>
      <lastmod>2026-11-01T21:12:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/check-if-it-s-an-angle-bisector/sssss1kc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-if-it-s-an-angle-bisector/sssss1kc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-if-it-s-an-angle-bisector/sssss1kc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-if-it-s-an-angle-bisector/sssss1kc"/>
      <lastmod>2026-11-01T21:12:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-slice-area-calculation/sssss1kr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-slice-area-calculation/sssss1kr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-slice-area-calculation/sssss1kr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-slice-area-calculation/sssss1kr"/>
      <lastmod>2026-11-01T22:01:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-slice-area-calculation/sssss1kr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-slice-area-calculation/sssss1kr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-slice-area-calculation/sssss1kr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-slice-area-calculation/sssss1kr"/>
      <lastmod>2026-11-01T22:01:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-on-a-cone/sssss1kh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-on-a-cone/sssss1kh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-on-a-cone/sssss1kh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-on-a-cone/sssss1kh"/>
      <lastmod>2026-11-02T02:24:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-on-a-cone/sssss1kh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-on-a-cone/sssss1kh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-on-a-cone/sssss1kh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-on-a-cone/sssss1kh"/>
      <lastmod>2026-11-02T02:24:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sideways-parabola/sssss1kt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sideways-parabola/sssss1kt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sideways-parabola/sssss1kt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sideways-parabola/sssss1kt"/>
      <lastmod>2026-11-01T21:42:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sideways-parabola/sssss1kt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sideways-parabola/sssss1kt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sideways-parabola/sssss1kt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sideways-parabola/sssss1kt"/>
      <lastmod>2026-11-01T21:42:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wave-propagation-of-circles/sssss1kx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-propagation-of-circles/sssss1kx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-propagation-of-circles/sssss1kx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-propagation-of-circles/sssss1kx"/>
      <lastmod>2026-11-02T18:42:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wave-propagation-of-circles/sssss1kx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-propagation-of-circles/sssss1kx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-propagation-of-circles/sssss1kx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-propagation-of-circles/sssss1kx"/>
      <lastmod>2026-11-02T18:42:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coin-flip-probability-demo/sssss1ki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coin-flip-probability-demo/sssss1ki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coin-flip-probability-demo/sssss1ki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coin-flip-probability-demo/sssss1ki"/>
      <lastmod>2026-11-01T23:55:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coin-flip-probability-demo/sssss1ki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coin-flip-probability-demo/sssss1ki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coin-flip-probability-demo/sssss1ki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coin-flip-probability-demo/sssss1ki"/>
      <lastmod>2026-11-01T23:55:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-perspective/sssss1ko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-perspective/sssss1ko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-perspective/sssss1ko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-perspective/sssss1ko"/>
      <lastmod>2026-11-02T18:25:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-perspective/sssss1ko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-perspective/sssss1ko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-perspective/sssss1ko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-perspective/sssss1ko"/>
      <lastmod>2026-11-02T18:25:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/least-squares-linear-regression/sssss1zs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/least-squares-linear-regression/sssss1zs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/least-squares-linear-regression/sssss1zs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/least-squares-linear-regression/sssss1zs"/>
      <lastmod>2026-11-02T17:04:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/least-squares-linear-regression/sssss1zs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/least-squares-linear-regression/sssss1zs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/least-squares-linear-regression/sssss1zs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/least-squares-linear-regression/sssss1zs"/>
      <lastmod>2026-11-02T17:04:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nested-and-rotated-cubes/sssss1z7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nested-and-rotated-cubes/sssss1z7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nested-and-rotated-cubes/sssss1z7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nested-and-rotated-cubes/sssss1z7"/>
      <lastmod>2026-11-02T18:42:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nested-and-rotated-cubes/sssss1z7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nested-and-rotated-cubes/sssss1z7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nested-and-rotated-cubes/sssss1z7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nested-and-rotated-cubes/sssss1z7"/>
      <lastmod>2026-11-02T18:42:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cuboid-construction-and-properties/sssss1zn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-construction-and-properties/sssss1zn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-construction-and-properties/sssss1zn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-construction-and-properties/sssss1zn"/>
      <lastmod>2026-11-01T21:24:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cuboid-construction-and-properties/sssss1zn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-construction-and-properties/sssss1zn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-construction-and-properties/sssss1zn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-construction-and-properties/sssss1zn"/>
      <lastmod>2026-11-01T21:24:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-without-angles/sssss1z2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-without-angles/sssss1z2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-without-angles/sssss1z2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-without-angles/sssss1z2"/>
      <lastmod>2026-11-01T21:13:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-without-angles/sssss1z2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-without-angles/sssss1z2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-without-angles/sssss1z2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-without-angles/sssss1z2"/>
      <lastmod>2026-11-01T21:13:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-based-prism/sssss1zk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-based-prism/sssss1zk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-based-prism/sssss1zk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-based-prism/sssss1zk"/>
      <lastmod>2026-11-02T16:43:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-based-prism/sssss1zk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-based-prism/sssss1zk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-based-prism/sssss1zk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-based-prism/sssss1zk"/>
      <lastmod>2026-11-02T16:43:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-line-from-point-to-circle/sssss1zz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-line-from-point-to-circle/sssss1zz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-line-from-point-to-circle/sssss1zz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-line-from-point-to-circle/sssss1zz"/>
      <lastmod>2026-11-01T20:50:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-line-from-point-to-circle/sssss1zz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-line-from-point-to-circle/sssss1zz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-line-from-point-to-circle/sssss1zz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-line-from-point-to-circle/sssss1zz"/>
      <lastmod>2026-11-01T20:50:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-the-2-squares-theorem/sssss1z0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-the-2-squares-theorem/sssss1z0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-the-2-squares-theorem/sssss1z0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-the-2-squares-theorem/sssss1z0"/>
      <lastmod>2026-11-02T12:40:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-the-2-squares-theorem/sssss1z0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-the-2-squares-theorem/sssss1z0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-the-2-squares-theorem/sssss1z0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-the-2-squares-theorem/sssss1z0"/>
      <lastmod>2026-11-02T12:40:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translating-parabola-vectors-2/sssss1zd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-parabola-vectors-2/sssss1zd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-parabola-vectors-2/sssss1zd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-parabola-vectors-2/sssss1zd"/>
      <lastmod>2026-11-02T16:55:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translating-parabola-vectors-2/sssss1zd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-parabola-vectors-2/sssss1zd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-parabola-vectors-2/sssss1zd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-parabola-vectors-2/sssss1zd"/>
      <lastmod>2026-11-02T16:55:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-example/sssss1zf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-example/sssss1zf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-example/sssss1zf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-example/sssss1zf"/>
      <lastmod>2026-11-01T21:21:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-example/sssss1zf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-example/sssss1zf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-example/sssss1zf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-example/sssss1zf"/>
      <lastmod>2026-11-01T21:21:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-a-line/sssss1z8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-a-line/sssss1z8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-a-line/sssss1z8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-a-line/sssss1z8"/>
      <lastmod>2026-11-01T21:27:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-a-line/sssss1z8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-a-line/sssss1z8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-a-line/sssss1z8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-a-line/sssss1z8"/>
      <lastmod>2026-11-01T21:27:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lissajous-curve-construction/sssss1zu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lissajous-curve-construction/sssss1zu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lissajous-curve-construction/sssss1zu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lissajous-curve-construction/sssss1zu"/>
      <lastmod>2026-11-01T23:44:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lissajous-curve-construction/sssss1zu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lissajous-curve-construction/sssss1zu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lissajous-curve-construction/sssss1zu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lissajous-curve-construction/sssss1zu"/>
      <lastmod>2026-11-01T23:44:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-of-children-chasing-unicorn/sssss1z5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-of-children-chasing-unicorn/sssss1z5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-of-children-chasing-unicorn/sssss1z5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-of-children-chasing-unicorn/sssss1z5"/>
      <lastmod>2026-11-01T19:30:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-of-children-chasing-unicorn/sssss1z5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-of-children-chasing-unicorn/sssss1z5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-of-children-chasing-unicorn/sssss1z5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-of-children-chasing-unicorn/sssss1z5"/>
      <lastmod>2026-11-01T19:30:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constant-translation-of-parallel-lines/sssss1zb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constant-translation-of-parallel-lines/sssss1zb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constant-translation-of-parallel-lines/sssss1zb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constant-translation-of-parallel-lines/sssss1zb"/>
      <lastmod>2026-11-02T13:11:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constant-translation-of-parallel-lines/sssss1zb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constant-translation-of-parallel-lines/sssss1zb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constant-translation-of-parallel-lines/sssss1zb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constant-translation-of-parallel-lines/sssss1zb"/>
      <lastmod>2026-11-02T13:11:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-inequality-system/sssss1z3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequality-system/sssss1z3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequality-system/sssss1z3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequality-system/sssss1z3"/>
      <lastmod>2026-11-02T06:41:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-inequality-system/sssss1z3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequality-system/sssss1z3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequality-system/sssss1z3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequality-system/sssss1z3"/>
      <lastmod>2026-11-02T06:41:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-slope-of-a-line/sssss1zq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-slope-of-a-line/sssss1zq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-slope-of-a-line/sssss1zq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-slope-of-a-line/sssss1zq"/>
      <lastmod>2026-11-01T23:55:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-slope-of-a-line/sssss1zq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-slope-of-a-line/sssss1zq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-slope-of-a-line/sssss1zq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-slope-of-a-line/sssss1zq"/>
      <lastmod>2026-11-01T23:55:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trig-ratio-estimations-v2/sssss1z1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-ratio-estimations-v2/sssss1z1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-ratio-estimations-v2/sssss1z1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-ratio-estimations-v2/sssss1z1"/>
      <lastmod>2026-11-02T11:54:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trig-ratio-estimations-v2/sssss1z1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-ratio-estimations-v2/sssss1z1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-ratio-estimations-v2/sssss1z1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-ratio-estimations-v2/sssss1z1"/>
      <lastmod>2026-11-02T11:54:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-limit-definition-exploring-rate-of-change-via-secant-and-tangent/sssss1zm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-limit-definition-exploring-rate-of-change-via-secant-and-tangent/sssss1zm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-limit-definition-exploring-rate-of-change-via-secant-and-tangent/sssss1zm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-limit-definition-exploring-rate-of-change-via-secant-and-tangent/sssss1zm"/>
      <lastmod>2026-11-02T00:44:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-limit-definition-exploring-rate-of-change-via-secant-and-tangent/sssss1zm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-limit-definition-exploring-rate-of-change-via-secant-and-tangent/sssss1zm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-limit-definition-exploring-rate-of-change-via-secant-and-tangent/sssss1zm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-limit-definition-exploring-rate-of-change-via-secant-and-tangent/sssss1zm"/>
      <lastmod>2026-11-02T00:44:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-craziest-function-graph/sssss1zj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-craziest-function-graph/sssss1zj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-craziest-function-graph/sssss1zj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-craziest-function-graph/sssss1zj"/>
      <lastmod>2026-11-02T18:57:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-craziest-function-graph/sssss1zj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-craziest-function-graph/sssss1zj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-craziest-function-graph/sssss1zj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-craziest-function-graph/sssss1zj"/>
      <lastmod>2026-11-02T18:57:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/activity-14-using-the-intersection-tool/sssss1zp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-14-using-the-intersection-tool/sssss1zp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-14-using-the-intersection-tool/sssss1zp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-14-using-the-intersection-tool/sssss1zp"/>
      <lastmod>2026-11-01T21:37:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/activity-14-using-the-intersection-tool/sssss1zp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-14-using-the-intersection-tool/sssss1zp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-14-using-the-intersection-tool/sssss1zp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-14-using-the-intersection-tool/sssss1zp"/>
      <lastmod>2026-11-01T21:37:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-rhombus-demo/sssss1zw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-rhombus-demo/sssss1zw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-rhombus-demo/sssss1zw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-rhombus-demo/sssss1zw"/>
      <lastmod>2026-11-01T21:08:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-rhombus-demo/sssss1zw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-rhombus-demo/sssss1zw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-rhombus-demo/sssss1zw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-rhombus-demo/sssss1zw"/>
      <lastmod>2026-11-01T21:08:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-net-by-christopher-lim/sssss1z6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net-by-christopher-lim/sssss1z6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net-by-christopher-lim/sssss1z6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net-by-christopher-lim/sssss1z6"/>
      <lastmod>2026-11-02T17:40:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-net-by-christopher-lim/sssss1z6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net-by-christopher-lim/sssss1z6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net-by-christopher-lim/sssss1z6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net-by-christopher-lim/sssss1z6"/>
      <lastmod>2026-11-02T17:40:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pointwise-convergence-does-not-preserve-continuity-a-counterexample/sssss1zg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pointwise-convergence-does-not-preserve-continuity-a-counterexample/sssss1zg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pointwise-convergence-does-not-preserve-continuity-a-counterexample/sssss1zg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pointwise-convergence-does-not-preserve-continuity-a-counterexample/sssss1zg"/>
      <lastmod>2026-11-01T21:38:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pointwise-convergence-does-not-preserve-continuity-a-counterexample/sssss1zg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pointwise-convergence-does-not-preserve-continuity-a-counterexample/sssss1zg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pointwise-convergence-does-not-preserve-continuity-a-counterexample/sssss1zg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pointwise-convergence-does-not-preserve-continuity-a-counterexample/sssss1zg"/>
      <lastmod>2026-11-01T21:38:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-antenna-mirror-model/sssss1z9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-antenna-mirror-model/sssss1z9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-antenna-mirror-model/sssss1z9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-antenna-mirror-model/sssss1z9"/>
      <lastmod>2026-11-02T16:35:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-antenna-mirror-model/sssss1z9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-antenna-mirror-model/sssss1z9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-antenna-mirror-model/sssss1z9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-antenna-mirror-model/sssss1z9"/>
      <lastmod>2026-11-02T16:35:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nomogram-exponential-functions/sssss1ze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nomogram-exponential-functions/sssss1ze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nomogram-exponential-functions/sssss1ze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nomogram-exponential-functions/sssss1ze"/>
      <lastmod>2026-11-02T03:19:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nomogram-exponential-functions/sssss1ze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nomogram-exponential-functions/sssss1ze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nomogram-exponential-functions/sssss1ze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nomogram-exponential-functions/sssss1ze"/>
      <lastmod>2026-11-02T03:19:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-and-median-line-animation/sssss1zv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-median-line-animation/sssss1zv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-median-line-animation/sssss1zv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-median-line-animation/sssss1zv"/>
      <lastmod>2026-11-02T17:03:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-and-median-line-animation/sssss1zv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-median-line-animation/sssss1zv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-median-line-animation/sssss1zv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-median-line-animation/sssss1zv"/>
      <lastmod>2026-11-02T17:03:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-translation-demonstration/sssss1z4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-translation-demonstration/sssss1z4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-translation-demonstration/sssss1z4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-translation-demonstration/sssss1z4"/>
      <lastmod>2026-11-01T19:34:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-translation-demonstration/sssss1z4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-translation-demonstration/sssss1z4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-translation-demonstration/sssss1z4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-translation-demonstration/sssss1z4"/>
      <lastmod>2026-11-01T19:34:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-rotation-construction-by-leigh-paris/sssss1zl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-rotation-construction-by-leigh-paris/sssss1zl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-rotation-construction-by-leigh-paris/sssss1zl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-rotation-construction-by-leigh-paris/sssss1zl"/>
      <lastmod>2026-11-01T23:44:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-rotation-construction-by-leigh-paris/sssss1zl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-rotation-construction-by-leigh-paris/sssss1zl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-rotation-construction-by-leigh-paris/sssss1zl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-rotation-construction-by-leigh-paris/sssss1zl"/>
      <lastmod>2026-11-01T23:44:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-models-for-improper-fractions-2-fractions/sssss1zy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-models-for-improper-fractions-2-fractions/sssss1zy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-models-for-improper-fractions-2-fractions/sssss1zy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-models-for-improper-fractions-2-fractions/sssss1zy"/>
      <lastmod>2026-11-02T00:29:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-models-for-improper-fractions-2-fractions/sssss1zy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-models-for-improper-fractions-2-fractions/sssss1zy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-models-for-improper-fractions-2-fractions/sssss1zy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-models-for-improper-fractions-2-fractions/sssss1zy"/>
      <lastmod>2026-11-02T00:29:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/corresponding-parts-and-scale-factors-practice/sssss1za</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corresponding-parts-and-scale-factors-practice/sssss1za"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corresponding-parts-and-scale-factors-practice/sssss1za"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corresponding-parts-and-scale-factors-practice/sssss1za"/>
      <lastmod>2026-11-02T08:25:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/corresponding-parts-and-scale-factors-practice/sssss1za</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corresponding-parts-and-scale-factors-practice/sssss1za"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corresponding-parts-and-scale-factors-practice/sssss1za"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corresponding-parts-and-scale-factors-practice/sssss1za"/>
      <lastmod>2026-11-02T08:25:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-1-trigonometric-functions-of-special-angles/sssss1zc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-1-trigonometric-functions-of-special-angles/sssss1zc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-1-trigonometric-functions-of-special-angles/sssss1zc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-1-trigonometric-functions-of-special-angles/sssss1zc"/>
      <lastmod>2026-11-02T12:38:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-1-trigonometric-functions-of-special-angles/sssss1zc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-1-trigonometric-functions-of-special-angles/sssss1zc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-1-trigonometric-functions-of-special-angles/sssss1zc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-1-trigonometric-functions-of-special-angles/sssss1zc"/>
      <lastmod>2026-11-02T12:38:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-derivative-of-exponential-functions/sssss1zr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-derivative-of-exponential-functions/sssss1zr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-derivative-of-exponential-functions/sssss1zr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-derivative-of-exponential-functions/sssss1zr"/>
      <lastmod>2026-11-02T18:09:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-derivative-of-exponential-functions/sssss1zr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-derivative-of-exponential-functions/sssss1zr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-derivative-of-exponential-functions/sssss1zr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-derivative-of-exponential-functions/sssss1zr"/>
      <lastmod>2026-11-02T18:09:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-and-tangent-slope/sssss1zh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-and-tangent-slope/sssss1zh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-and-tangent-slope/sssss1zh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-and-tangent-slope/sssss1zh"/>
      <lastmod>2026-11-02T03:07:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-and-tangent-slope/sssss1zh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-and-tangent-slope/sssss1zh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-and-tangent-slope/sssss1zh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-and-tangent-slope/sssss1zh"/>
      <lastmod>2026-11-02T03:07:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/b-trig-transformations-explanation/sssss1zt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/b-trig-transformations-explanation/sssss1zt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/b-trig-transformations-explanation/sssss1zt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/b-trig-transformations-explanation/sssss1zt"/>
      <lastmod>2026-11-02T18:58:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/b-trig-transformations-explanation/sssss1zt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/b-trig-transformations-explanation/sssss1zt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/b-trig-transformations-explanation/sssss1zt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/b-trig-transformations-explanation/sssss1zt"/>
      <lastmod>2026-11-02T18:58:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-congruence-exploration-by-laura-rock/sssss1zx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-exploration-by-laura-rock/sssss1zx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-exploration-by-laura-rock/sssss1zx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-exploration-by-laura-rock/sssss1zx"/>
      <lastmod>2026-11-02T16:46:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-congruence-exploration-by-laura-rock/sssss1zx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-exploration-by-laura-rock/sssss1zx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-exploration-by-laura-rock/sssss1zx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-exploration-by-laura-rock/sssss1zx"/>
      <lastmod>2026-11-02T16:46:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-demo-by-robertrahm/sssss1zi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-robertrahm/sssss1zi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demo-by-robertrahm/sssss1zi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-robertrahm/sssss1zi"/>
      <lastmod>2026-11-02T17:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-demo-by-robertrahm/sssss1zi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-robertrahm/sssss1zi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demo-by-robertrahm/sssss1zi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-robertrahm/sssss1zi"/>
      <lastmod>2026-11-02T17:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigation-of-the-derivative-of-y-sin-x/sssss1zo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigation-of-the-derivative-of-y-sin-x/sssss1zo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigation-of-the-derivative-of-y-sin-x/sssss1zo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigation-of-the-derivative-of-y-sin-x/sssss1zo"/>
      <lastmod>2026-11-02T16:58:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigation-of-the-derivative-of-y-sin-x/sssss1zo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigation-of-the-derivative-of-y-sin-x/sssss1zo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigation-of-the-derivative-of-y-sin-x/sssss1zo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigation-of-the-derivative-of-y-sin-x/sssss1zo"/>
      <lastmod>2026-11-02T16:58:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-unit-circle-demo/sssss10s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-unit-circle-demo/sssss10s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-unit-circle-demo/sssss10s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-unit-circle-demo/sssss10s"/>
      <lastmod>2026-11-02T17:00:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-unit-circle-demo/sssss10s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-unit-circle-demo/sssss10s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-unit-circle-demo/sssss10s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-unit-circle-demo/sssss10s"/>
      <lastmod>2026-11-02T17:00:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cos-and-sin-in-a-unit-circle/sssss107</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cos-and-sin-in-a-unit-circle/sssss107"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cos-and-sin-in-a-unit-circle/sssss107"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cos-and-sin-in-a-unit-circle/sssss107"/>
      <lastmod>2026-11-02T18:45:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cos-and-sin-in-a-unit-circle/sssss107</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cos-and-sin-in-a-unit-circle/sssss107"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cos-and-sin-in-a-unit-circle/sssss107"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cos-and-sin-in-a-unit-circle/sssss107"/>
      <lastmod>2026-11-02T18:45:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-y-2-x-2-1-hyperbola-relation-and-translations/sssss10n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-y-2-x-2-1-hyperbola-relation-and-translations/sssss10n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-y-2-x-2-1-hyperbola-relation-and-translations/sssss10n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-y-2-x-2-1-hyperbola-relation-and-translations/sssss10n"/>
      <lastmod>2026-11-02T00:28:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-y-2-x-2-1-hyperbola-relation-and-translations/sssss10n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-y-2-x-2-1-hyperbola-relation-and-translations/sssss10n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-y-2-x-2-1-hyperbola-relation-and-translations/sssss10n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-y-2-x-2-1-hyperbola-relation-and-translations/sssss10n"/>
      <lastmod>2026-11-02T00:28:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-and-centroid-demo/sssss102</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-and-centroid-demo/sssss102"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-and-centroid-demo/sssss102"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-and-centroid-demo/sssss102"/>
      <lastmod>2026-11-02T18:44:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-and-centroid-demo/sssss102</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-and-centroid-demo/sssss102"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-and-centroid-demo/sssss102"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-and-centroid-demo/sssss102"/>
      <lastmod>2026-11-02T18:44:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-ratios/sssss10k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-ratios/sssss10k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-ratios/sssss10k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-ratios/sssss10k"/>
      <lastmod>2026-11-02T18:15:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-ratios/sssss10k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-ratios/sssss10k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-ratios/sssss10k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-ratios/sssss10k"/>
      <lastmod>2026-11-02T18:15:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-symmetry-5/sssss10z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-symmetry-5/sssss10z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-symmetry-5/sssss10z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-symmetry-5/sssss10z"/>
      <lastmod>2026-11-02T13:57:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-symmetry-5/sssss10z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-symmetry-5/sssss10z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-symmetry-5/sssss10z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-symmetry-5/sssss10z"/>
      <lastmod>2026-11-02T13:57:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-transformation/sssss100</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-transformation/sssss100"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-transformation/sssss100"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-transformation/sssss100"/>
      <lastmod>2026-11-02T16:49:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-transformation/sssss100</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-transformation/sssss100"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-transformation/sssss100"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-transformation/sssss100"/>
      <lastmod>2026-11-02T16:49:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-perspectives-of-euler-s-formula/sssss10d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-perspectives-of-euler-s-formula/sssss10d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-perspectives-of-euler-s-formula/sssss10d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-perspectives-of-euler-s-formula/sssss10d"/>
      <lastmod>2026-11-01T20:49:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-perspectives-of-euler-s-formula/sssss10d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-perspectives-of-euler-s-formula/sssss10d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-perspectives-of-euler-s-formula/sssss10d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-perspectives-of-euler-s-formula/sssss10d"/>
      <lastmod>2026-11-01T20:49:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/peanut-jumping-over-a-wall/sssss10f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/peanut-jumping-over-a-wall/sssss10f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/peanut-jumping-over-a-wall/sssss10f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/peanut-jumping-over-a-wall/sssss10f"/>
      <lastmod>2026-11-01T19:22:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/peanut-jumping-over-a-wall/sssss10f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/peanut-jumping-over-a-wall/sssss10f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/peanut-jumping-over-a-wall/sssss10f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/peanut-jumping-over-a-wall/sssss10f"/>
      <lastmod>2026-11-01T19:22:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-7-4-1/sssss108</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-7-4-1/sssss108"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-7-4-1/sssss108"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-7-4-1/sssss108"/>
      <lastmod>2026-11-02T14:52:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-7-4-1/sssss108</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-7-4-1/sssss108"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-7-4-1/sssss108"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-7-4-1/sssss108"/>
      <lastmod>2026-11-02T14:52:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-mass-length-practice/sssss10u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-mass-length-practice/sssss10u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-mass-length-practice/sssss10u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-mass-length-practice/sssss10u"/>
      <lastmod>2026-11-02T00:42:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-mass-length-practice/sssss10u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-mass-length-practice/sssss10u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-mass-length-practice/sssss10u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-mass-length-practice/sssss10u"/>
      <lastmod>2026-11-02T00:42:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-pattern-example/sssss105</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-pattern-example/sssss105"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-pattern-example/sssss105"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-pattern-example/sssss105"/>
      <lastmod>2026-11-02T17:13:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-pattern-example/sssss105</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-pattern-example/sssss105"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-pattern-example/sssss105"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-pattern-example/sssss105"/>
      <lastmod>2026-11-02T17:13:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-with-animated-point/sssss10b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-with-animated-point/sssss10b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-with-animated-point/sssss10b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-with-animated-point/sssss10b"/>
      <lastmod>2026-11-01T22:06:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-with-animated-point/sssss10b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-with-animated-point/sssss10b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-with-animated-point/sssss10b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-with-animated-point/sssss10b"/>
      <lastmod>2026-11-01T22:06:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hart-s-a-frame-linkage-produces-straight-line-motion/sssss103</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hart-s-a-frame-linkage-produces-straight-line-motion/sssss103"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hart-s-a-frame-linkage-produces-straight-line-motion/sssss103"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hart-s-a-frame-linkage-produces-straight-line-motion/sssss103"/>
      <lastmod>2026-11-02T02:44:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hart-s-a-frame-linkage-produces-straight-line-motion/sssss103</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hart-s-a-frame-linkage-produces-straight-line-motion/sssss103"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hart-s-a-frame-linkage-produces-straight-line-motion/sssss103"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hart-s-a-frame-linkage-produces-straight-line-motion/sssss103"/>
      <lastmod>2026-11-02T02:44:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-lines-by-edward-james-kirk/sssss10q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-by-edward-james-kirk/sssss10q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-by-edward-james-kirk/sssss10q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-by-edward-james-kirk/sssss10q"/>
      <lastmod>2026-11-02T16:57:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-lines-by-edward-james-kirk/sssss10q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-by-edward-james-kirk/sssss10q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-by-edward-james-kirk/sssss10q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-by-edward-james-kirk/sssss10q"/>
      <lastmod>2026-11-02T16:57:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-relationship-between-circle-and-cyclic-quadrilateral/sssss101</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-between-circle-and-cyclic-quadrilateral/sssss101"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-between-circle-and-cyclic-quadrilateral/sssss101"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-between-circle-and-cyclic-quadrilateral/sssss101"/>
      <lastmod>2026-11-02T18:19:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-relationship-between-circle-and-cyclic-quadrilateral/sssss101</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-between-circle-and-cyclic-quadrilateral/sssss101"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-between-circle-and-cyclic-quadrilateral/sssss101"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-between-circle-and-cyclic-quadrilateral/sssss101"/>
      <lastmod>2026-11-02T18:19:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-model-and-factored-form-vs-standard-form-black-and-white-version/sssss10m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-model-and-factored-form-vs-standard-form-black-and-white-version/sssss10m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-model-and-factored-form-vs-standard-form-black-and-white-version/sssss10m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-model-and-factored-form-vs-standard-form-black-and-white-version/sssss10m"/>
      <lastmod>2026-11-02T09:58:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-model-and-factored-form-vs-standard-form-black-and-white-version/sssss10m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-model-and-factored-form-vs-standard-form-black-and-white-version/sssss10m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-model-and-factored-form-vs-standard-form-black-and-white-version/sssss10m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-model-and-factored-form-vs-standard-form-black-and-white-version/sssss10m"/>
      <lastmod>2026-11-02T09:58:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-symmetry-rules/sssss10j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-symmetry-rules/sssss10j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-symmetry-rules/sssss10j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-symmetry-rules/sssss10j"/>
      <lastmod>2026-11-01T21:50:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-of-symmetry-rules/sssss10j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-symmetry-rules/sssss10j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-symmetry-rules/sssss10j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-symmetry-rules/sssss10j"/>
      <lastmod>2026-11-01T21:50:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-gravitational-field-model/sssss10p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-gravitational-field-model/sssss10p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-gravitational-field-model/sssss10p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-gravitational-field-model/sssss10p"/>
      <lastmod>2026-11-02T00:53:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-gravitational-field-model/sssss10p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-gravitational-field-model/sssss10p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-gravitational-field-model/sssss10p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-gravitational-field-model/sssss10p"/>
      <lastmod>2026-11-02T00:53:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-a-trigonometric-function-through-points/sssss10w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-a-trigonometric-function-through-points/sssss10w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-a-trigonometric-function-through-points/sssss10w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-a-trigonometric-function-through-points/sssss10w"/>
      <lastmod>2026-11-01T23:19:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-a-trigonometric-function-through-points/sssss10w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-a-trigonometric-function-through-points/sssss10w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-a-trigonometric-function-through-points/sssss10w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-a-trigonometric-function-through-points/sssss10w"/>
      <lastmod>2026-11-01T23:19:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-and-circle-geometric-relationship-demo/sssss106</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-circle-geometric-relationship-demo/sssss106"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-circle-geometric-relationship-demo/sssss106"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-circle-geometric-relationship-demo/sssss106"/>
      <lastmod>2026-11-02T00:06:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-and-circle-geometric-relationship-demo/sssss106</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-circle-geometric-relationship-demo/sssss106"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-circle-geometric-relationship-demo/sssss106"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-circle-geometric-relationship-demo/sssss106"/>
      <lastmod>2026-11-02T00:06:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-over-intersecting-lines/sssss10g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-over-intersecting-lines/sssss10g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-over-intersecting-lines/sssss10g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-over-intersecting-lines/sssss10g"/>
      <lastmod>2026-11-02T18:42:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-over-intersecting-lines/sssss10g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-over-intersecting-lines/sssss10g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-over-intersecting-lines/sssss10g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-over-intersecting-lines/sssss10g"/>
      <lastmod>2026-11-02T18:42:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/continuity-at-a-point/sssss109</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuity-at-a-point/sssss109"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuity-at-a-point/sssss109"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuity-at-a-point/sssss109"/>
      <lastmod>2026-11-02T02:17:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/continuity-at-a-point/sssss109</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuity-at-a-point/sssss109"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuity-at-a-point/sssss109"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuity-at-a-point/sssss109"/>
      <lastmod>2026-11-02T02:17:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/moir-effect-on-a-sphere/sssss10e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moir-effect-on-a-sphere/sssss10e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moir-effect-on-a-sphere/sssss10e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moir-effect-on-a-sphere/sssss10e"/>
      <lastmod>2026-11-02T02:16:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/moir-effect-on-a-sphere/sssss10e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moir-effect-on-a-sphere/sssss10e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moir-effect-on-a-sphere/sssss10e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moir-effect-on-a-sphere/sssss10e"/>
      <lastmod>2026-11-02T02:16:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-and-surface-area-of-a-cylinder-by-math-team-energytech/sssss10v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-a-cylinder-by-math-team-energytech/sssss10v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-and-surface-area-of-a-cylinder-by-math-team-energytech/sssss10v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-a-cylinder-by-math-team-energytech/sssss10v"/>
      <lastmod>2026-11-02T00:21:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-and-surface-area-of-a-cylinder-by-math-team-energytech/sssss10v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-a-cylinder-by-math-team-energytech/sssss10v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-and-surface-area-of-a-cylinder-by-math-team-energytech/sssss10v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-and-surface-area-of-a-cylinder-by-math-team-energytech/sssss10v"/>
      <lastmod>2026-11-02T00:21:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-views-demonstration-by-geogebra-team/sssss104</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-views-demonstration-by-geogebra-team/sssss104"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-views-demonstration-by-geogebra-team/sssss104"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-views-demonstration-by-geogebra-team/sssss104"/>
      <lastmod>2026-11-01T22:08:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-views-demonstration-by-geogebra-team/sssss104</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-views-demonstration-by-geogebra-team/sssss104"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-views-demonstration-by-geogebra-team/sssss104"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-views-demonstration-by-geogebra-team/sssss104"/>
      <lastmod>2026-11-01T22:08:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hcf-lcm-of-two-numbers-by-short-division/sssss10l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hcf-lcm-of-two-numbers-by-short-division/sssss10l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hcf-lcm-of-two-numbers-by-short-division/sssss10l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hcf-lcm-of-two-numbers-by-short-division/sssss10l"/>
      <lastmod>2026-11-01T23:57:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hcf-lcm-of-two-numbers-by-short-division/sssss10l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hcf-lcm-of-two-numbers-by-short-division/sssss10l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hcf-lcm-of-two-numbers-by-short-division/sssss10l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hcf-lcm-of-two-numbers-by-short-division/sssss10l"/>
      <lastmod>2026-11-01T23:57:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-cuboid/sssss10y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-cuboid/sssss10y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-cuboid/sssss10y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-cuboid/sssss10y"/>
      <lastmod>2026-11-02T03:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-cuboid/sssss10y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-cuboid/sssss10y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-cuboid/sssss10y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-cuboid/sssss10y"/>
      <lastmod>2026-11-02T03:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-the-leclerc-logo/sssss10a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-leclerc-logo/sssss10a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-leclerc-logo/sssss10a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-leclerc-logo/sssss10a"/>
      <lastmod>2026-11-01T21:09:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-the-leclerc-logo/sssss10a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-leclerc-logo/sssss10a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-leclerc-logo/sssss10a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-leclerc-logo/sssss10a"/>
      <lastmod>2026-11-01T21:09:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-square-mapping-between-two-planes/sssss10c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-square-mapping-between-two-planes/sssss10c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-square-mapping-between-two-planes/sssss10c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-square-mapping-between-two-planes/sssss10c"/>
      <lastmod>2026-11-02T09:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-square-mapping-between-two-planes/sssss10c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-square-mapping-between-two-planes/sssss10c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-square-mapping-between-two-planes/sssss10c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-square-mapping-between-two-planes/sssss10c"/>
      <lastmod>2026-11-02T09:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-number-visualiser-tenths-and-hundredths/sssss10r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-number-visualiser-tenths-and-hundredths/sssss10r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-number-visualiser-tenths-and-hundredths/sssss10r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-number-visualiser-tenths-and-hundredths/sssss10r"/>
      <lastmod>2026-11-01T19:09:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-number-visualiser-tenths-and-hundredths/sssss10r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-number-visualiser-tenths-and-hundredths/sssss10r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-number-visualiser-tenths-and-hundredths/sssss10r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-number-visualiser-tenths-and-hundredths/sssss10r"/>
      <lastmod>2026-11-01T19:09:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-animated-gif-and-multi-page-pdf-export-example/sssss10h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-animated-gif-and-multi-page-pdf-export-example/sssss10h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-animated-gif-and-multi-page-pdf-export-example/sssss10h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-animated-gif-and-multi-page-pdf-export-example/sssss10h"/>
      <lastmod>2026-11-02T02:47:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-animated-gif-and-multi-page-pdf-export-example/sssss10h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-animated-gif-and-multi-page-pdf-export-example/sssss10h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-animated-gif-and-multi-page-pdf-export-example/sssss10h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-animated-gif-and-multi-page-pdf-export-example/sssss10h"/>
      <lastmod>2026-11-02T02:47:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/math-art-arrangement-of-polygons-rotation-and-homothety/sssss10t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-art-arrangement-of-polygons-rotation-and-homothety/sssss10t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-art-arrangement-of-polygons-rotation-and-homothety/sssss10t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-art-arrangement-of-polygons-rotation-and-homothety/sssss10t"/>
      <lastmod>2026-11-01T19:10:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/math-art-arrangement-of-polygons-rotation-and-homothety/sssss10t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-art-arrangement-of-polygons-rotation-and-homothety/sssss10t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-art-arrangement-of-polygons-rotation-and-homothety/sssss10t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-art-arrangement-of-polygons-rotation-and-homothety/sssss10t"/>
      <lastmod>2026-11-01T19:10:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-as-parts-of-circles/sssss10x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-as-parts-of-circles/sssss10x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-as-parts-of-circles/sssss10x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-as-parts-of-circles/sssss10x"/>
      <lastmod>2026-11-01T21:10:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-as-parts-of-circles/sssss10x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-as-parts-of-circles/sssss10x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-as-parts-of-circles/sssss10x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-as-parts-of-circles/sssss10x"/>
      <lastmod>2026-11-01T21:10:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem/sssss10i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem/sssss10i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-sas-triangle-congruence-theorem/sssss10i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem/sssss10i"/>
      <lastmod>2026-11-01T21:28:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-proof-of-sas-triangle-congruence-theorem/sssss10i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem/sssss10i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-sas-triangle-congruence-theorem/sssss10i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem/sssss10i"/>
      <lastmod>2026-11-01T21:28:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/correlation-and-the-line-of-best-fit/sssss10o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-and-the-line-of-best-fit/sssss10o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-and-the-line-of-best-fit/sssss10o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-and-the-line-of-best-fit/sssss10o"/>
      <lastmod>2026-11-01T19:12:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/correlation-and-the-line-of-best-fit/sssss10o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-and-the-line-of-best-fit/sssss10o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-and-the-line-of-best-fit/sssss10o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-and-the-line-of-best-fit/sssss10o"/>
      <lastmod>2026-11-01T19:12:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangles-identifying-sides-wrt-acute-angles/sssss1ds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-identifying-sides-wrt-acute-angles/sssss1ds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-identifying-sides-wrt-acute-angles/sssss1ds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-identifying-sides-wrt-acute-angles/sssss1ds"/>
      <lastmod>2026-11-02T16:32:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangles-identifying-sides-wrt-acute-angles/sssss1ds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-identifying-sides-wrt-acute-angles/sssss1ds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-identifying-sides-wrt-acute-angles/sssss1ds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-identifying-sides-wrt-acute-angles/sssss1ds"/>
      <lastmod>2026-11-02T16:32:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-intersection-demo/sssss1d7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-intersection-demo/sssss1d7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-intersection-demo/sssss1d7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-intersection-demo/sssss1d7"/>
      <lastmod>2026-11-02T12:09:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-intersection-demo/sssss1d7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-intersection-demo/sssss1d7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-intersection-demo/sssss1d7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-intersection-demo/sssss1d7"/>
      <lastmod>2026-11-02T12:09:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-point-form-line-equation-example/sssss1dn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-point-form-line-equation-example/sssss1dn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-point-form-line-equation-example/sssss1dn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-point-form-line-equation-example/sssss1dn"/>
      <lastmod>2026-11-02T00:44:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-point-form-line-equation-example/sssss1dn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-point-form-line-equation-example/sssss1dn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-point-form-line-equation-example/sssss1dn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-point-form-line-equation-example/sssss1dn"/>
      <lastmod>2026-11-02T00:44:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sketch-first-derivative-of-a-function/sssss1d2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketch-first-derivative-of-a-function/sssss1d2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketch-first-derivative-of-a-function/sssss1d2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketch-first-derivative-of-a-function/sssss1d2"/>
      <lastmod>2026-11-02T18:51:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sketch-first-derivative-of-a-function/sssss1d2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketch-first-derivative-of-a-function/sssss1d2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketch-first-derivative-of-a-function/sssss1d2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketch-first-derivative-of-a-function/sssss1d2"/>
      <lastmod>2026-11-02T18:51:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-in-random-movables/sssss1dk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-in-random-movables/sssss1dk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-in-random-movables/sssss1dk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-in-random-movables/sssss1dk"/>
      <lastmod>2026-11-01T21:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-in-random-movables/sssss1dk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-in-random-movables/sssss1dk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-in-random-movables/sssss1dk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-in-random-movables/sssss1dk"/>
      <lastmod>2026-11-01T21:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-trigonometry-demo/sssss1dz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometry-demo/sssss1dz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometry-demo/sssss1dz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometry-demo/sssss1dz"/>
      <lastmod>2026-11-02T16:57:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-trigonometry-demo/sssss1dz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometry-demo/sssss1dz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometry-demo/sssss1dz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometry-demo/sssss1dz"/>
      <lastmod>2026-11-02T16:57:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-vectors-demo/sssss1d0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-demo/sssss1d0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-demo/sssss1d0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-demo/sssss1d0"/>
      <lastmod>2026-11-02T09:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-vectors-demo/sssss1d0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-demo/sssss1d0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-demo/sssss1d0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-demo/sssss1d0"/>
      <lastmod>2026-11-02T09:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/open-middle-building-rhombuses/sssss1dd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-middle-building-rhombuses/sssss1dd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-middle-building-rhombuses/sssss1dd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-middle-building-rhombuses/sssss1dd"/>
      <lastmod>2026-11-01T20:39:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/open-middle-building-rhombuses/sssss1dd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-middle-building-rhombuses/sssss1dd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-middle-building-rhombuses/sssss1dd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-middle-building-rhombuses/sssss1dd"/>
      <lastmod>2026-11-01T20:39:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perspective-cube/sssss1df</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perspective-cube/sssss1df"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perspective-cube/sssss1df"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perspective-cube/sssss1df"/>
      <lastmod>2026-11-01T23:38:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perspective-cube/sssss1df</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perspective-cube/sssss1df"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perspective-cube/sssss1df"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perspective-cube/sssss1df"/>
      <lastmod>2026-11-01T23:38:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/battleship-in-the-coordinate-plane/sssss1d8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/battleship-in-the-coordinate-plane/sssss1d8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/battleship-in-the-coordinate-plane/sssss1d8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/battleship-in-the-coordinate-plane/sssss1d8"/>
      <lastmod>2026-11-02T03:12:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/battleship-in-the-coordinate-plane/sssss1d8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/battleship-in-the-coordinate-plane/sssss1d8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/battleship-in-the-coordinate-plane/sssss1d8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/battleship-in-the-coordinate-plane/sssss1d8"/>
      <lastmod>2026-11-02T03:12:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-to-exponential-functions/sssss1du</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-to-exponential-functions/sssss1du"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-to-exponential-functions/sssss1du"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-to-exponential-functions/sssss1du"/>
      <lastmod>2026-11-02T17:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-to-exponential-functions/sssss1du</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-to-exponential-functions/sssss1du"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-to-exponential-functions/sssss1du"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-to-exponential-functions/sssss1du"/>
      <lastmod>2026-11-02T17:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-between-two-planes/sssss1d5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-two-planes/sssss1d5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-two-planes/sssss1d5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-two-planes/sssss1d5"/>
      <lastmod>2026-11-02T18:34:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-between-two-planes/sssss1d5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-two-planes/sssss1d5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-two-planes/sssss1d5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-two-planes/sssss1d5"/>
      <lastmod>2026-11-02T18:34:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-a-cone/sssss1db</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-a-cone/sssss1db"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-a-cone/sssss1db"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-a-cone/sssss1db"/>
      <lastmod>2026-11-01T23:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-a-cone/sssss1db</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-a-cone/sssss1db"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-a-cone/sssss1db"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-a-cone/sssss1db"/>
      <lastmod>2026-11-01T23:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/in-circle-of-triangle/sssss1d3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/in-circle-of-triangle/sssss1d3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/in-circle-of-triangle/sssss1d3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/in-circle-of-triangle/sssss1d3"/>
      <lastmod>2026-11-02T02:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/in-circle-of-triangle/sssss1d3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/in-circle-of-triangle/sssss1d3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/in-circle-of-triangle/sssss1d3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/in-circle-of-triangle/sssss1d3"/>
      <lastmod>2026-11-02T02:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions-page-45/sssss1dq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions-page-45/sssss1dq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-and-negative-binomial-distributions-page-45/sssss1dq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions-page-45/sssss1dq"/>
      <lastmod>2026-11-02T00:06:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-and-negative-binomial-distributions-page-45/sssss1dq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions-page-45/sssss1dq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-and-negative-binomial-distributions-page-45/sssss1dq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions-page-45/sssss1dq"/>
      <lastmod>2026-11-02T00:06:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-strikes/sssss1d1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-strikes/sssss1d1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-strikes/sssss1d1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-strikes/sssss1d1"/>
      <lastmod>2026-11-02T17:41:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-strikes/sssss1d1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-strikes/sssss1d1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-strikes/sssss1d1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-strikes/sssss1d1"/>
      <lastmod>2026-11-02T17:41:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagoras-theorem-proof-without-words/sssss1dm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-proof-without-words/sssss1dm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-theorem-proof-without-words/sssss1dm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-proof-without-words/sssss1dm"/>
      <lastmod>2026-11-01T20:41:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagoras-theorem-proof-without-words/sssss1dm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-proof-without-words/sssss1dm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-theorem-proof-without-words/sssss1dm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-proof-without-words/sssss1dm"/>
      <lastmod>2026-11-01T20:41:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/celestial-sphere-model/sssss1dj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/celestial-sphere-model/sssss1dj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/celestial-sphere-model/sssss1dj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/celestial-sphere-model/sssss1dj"/>
      <lastmod>2026-11-02T08:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/celestial-sphere-model/sssss1dj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/celestial-sphere-model/sssss1dj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/celestial-sphere-model/sssss1dj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/celestial-sphere-model/sssss1dj"/>
      <lastmod>2026-11-02T08:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-demonstration-by-robert-g1998/sssss1dp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-demonstration-by-robert-g1998/sssss1dp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-demonstration-by-robert-g1998/sssss1dp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-demonstration-by-robert-g1998/sssss1dp"/>
      <lastmod>2026-11-02T12:58:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-demonstration-by-robert-g1998/sssss1dp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-demonstration-by-robert-g1998/sssss1dp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-demonstration-by-robert-g1998/sssss1dp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-demonstration-by-robert-g1998/sssss1dp"/>
      <lastmod>2026-11-02T12:58:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-vs-perimeter-relationship/sssss1dw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-vs-perimeter-relationship/sssss1dw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-vs-perimeter-relationship/sssss1dw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-vs-perimeter-relationship/sssss1dw"/>
      <lastmod>2026-11-01T23:38:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-vs-perimeter-relationship/sssss1dw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-vs-perimeter-relationship/sssss1dw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-vs-perimeter-relationship/sssss1dw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-vs-perimeter-relationship/sssss1dw"/>
      <lastmod>2026-11-01T23:38:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reciprocal-transformation/sssss1d6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-transformation/sssss1d6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-transformation/sssss1d6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-transformation/sssss1d6"/>
      <lastmod>2026-11-02T17:49:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reciprocal-transformation/sssss1d6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-transformation/sssss1d6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-transformation/sssss1d6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-transformation/sssss1d6"/>
      <lastmod>2026-11-02T17:49:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-radians-and-arc-length/sssss1dg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-radians-and-arc-length/sssss1dg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-radians-and-arc-length/sssss1dg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-radians-and-arc-length/sssss1dg"/>
      <lastmod>2026-11-02T18:45:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-radians-and-arc-length/sssss1dg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-radians-and-arc-length/sssss1dg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-radians-and-arc-length/sssss1dg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-radians-and-arc-length/sssss1dg"/>
      <lastmod>2026-11-02T18:45:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-section-of-a-3-sphere/sssss1d9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-section-of-a-3-sphere/sssss1d9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-section-of-a-3-sphere/sssss1d9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-section-of-a-3-sphere/sssss1d9"/>
      <lastmod>2026-11-01T21:31:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-section-of-a-3-sphere/sssss1d9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-section-of-a-3-sphere/sssss1d9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-section-of-a-3-sphere/sssss1d9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-section-of-a-3-sphere/sssss1d9"/>
      <lastmod>2026-11-01T21:31:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-histograms/sssss1de</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-histograms/sssss1de"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-histograms/sssss1de"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-histograms/sssss1de"/>
      <lastmod>2026-11-02T16:53:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-histograms/sssss1de</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-histograms/sssss1de"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-histograms/sssss1de"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-histograms/sssss1de"/>
      <lastmod>2026-11-02T16:53:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-folding-and-rectangle-relationship/sssss1dv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-folding-and-rectangle-relationship/sssss1dv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-folding-and-rectangle-relationship/sssss1dv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-folding-and-rectangle-relationship/sssss1dv"/>
      <lastmod>2026-11-02T02:15:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-folding-and-rectangle-relationship/sssss1dv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-folding-and-rectangle-relationship/sssss1dv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-folding-and-rectangle-relationship/sssss1dv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-folding-and-rectangle-relationship/sssss1dv"/>
      <lastmod>2026-11-02T02:15:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-area-calculation-demo/sssss1d4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-calculation-demo/sssss1d4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-calculation-demo/sssss1d4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-calculation-demo/sssss1d4"/>
      <lastmod>2026-11-02T18:25:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-area-calculation-demo/sssss1d4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-calculation-demo/sssss1d4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-calculation-demo/sssss1d4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-calculation-demo/sssss1d4"/>
      <lastmod>2026-11-02T18:25:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-addition-demonstration-by-nathan/sssss1dl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-addition-demonstration-by-nathan/sssss1dl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-addition-demonstration-by-nathan/sssss1dl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-addition-demonstration-by-nathan/sssss1dl"/>
      <lastmod>2026-11-02T18:47:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-addition-demonstration-by-nathan/sssss1dl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-addition-demonstration-by-nathan/sssss1dl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-addition-demonstration-by-nathan/sssss1dl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-addition-demonstration-by-nathan/sssss1dl"/>
      <lastmod>2026-11-02T18:47:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-and-percentages-visualizing-polygons-incircles-and-statistical-dist/sssss1dy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-and-percentages-visualizing-polygons-incircles-and-statistical-dist/sssss1dy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-and-percentages-visualizing-polygons-incircles-and-statistical-dist/sssss1dy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-and-percentages-visualizing-polygons-incircles-and-statistical-dist/sssss1dy"/>
      <lastmod>2026-11-02T10:47:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-and-percentages-visualizing-polygons-incircles-and-statistical-dist/sssss1dy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-and-percentages-visualizing-polygons-incircles-and-statistical-dist/sssss1dy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-and-percentages-visualizing-polygons-incircles-and-statistical-dist/sssss1dy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-and-percentages-visualizing-polygons-incircles-and-statistical-dist/sssss1dy"/>
      <lastmod>2026-11-02T10:47:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-parabola/sssss1da</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-parabola/sssss1da"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-parabola/sssss1da"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-parabola/sssss1da"/>
      <lastmod>2026-11-02T18:58:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-parabola/sssss1da</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-parabola/sssss1da"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-parabola/sssss1da"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-parabola/sssss1da"/>
      <lastmod>2026-11-02T18:58:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-circle-by-alex-h/sssss1dc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-circle-by-alex-h/sssss1dc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-circle-by-alex-h/sssss1dc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-circle-by-alex-h/sssss1dc"/>
      <lastmod>2026-11-01T23:26:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-circle-by-alex-h/sssss1dc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-circle-by-alex-h/sssss1dc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-circle-by-alex-h/sssss1dc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-circle-by-alex-h/sssss1dc"/>
      <lastmod>2026-11-01T23:26:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/four-regular-hexagons-in-a-cube-form-a-cuboctahedron/sssss1dr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/four-regular-hexagons-in-a-cube-form-a-cuboctahedron/sssss1dr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/four-regular-hexagons-in-a-cube-form-a-cuboctahedron/sssss1dr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/four-regular-hexagons-in-a-cube-form-a-cuboctahedron/sssss1dr"/>
      <lastmod>2026-11-01T21:53:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/four-regular-hexagons-in-a-cube-form-a-cuboctahedron/sssss1dr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/four-regular-hexagons-in-a-cube-form-a-cuboctahedron/sssss1dr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/four-regular-hexagons-in-a-cube-form-a-cuboctahedron/sssss1dr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/four-regular-hexagons-in-a-cube-form-a-cuboctahedron/sssss1dr"/>
      <lastmod>2026-11-01T21:53:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-points-and-lines-in-a-triangle/sssss1dh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-points-and-lines-in-a-triangle/sssss1dh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-points-and-lines-in-a-triangle/sssss1dh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-points-and-lines-in-a-triangle/sssss1dh"/>
      <lastmod>2026-11-02T02:47:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-points-and-lines-in-a-triangle/sssss1dh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-points-and-lines-in-a-triangle/sssss1dh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-points-and-lines-in-a-triangle/sssss1dh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-points-and-lines-in-a-triangle/sssss1dh"/>
      <lastmod>2026-11-02T02:47:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/path-between-two-points-on-a-cone/sssss1dt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/path-between-two-points-on-a-cone/sssss1dt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/path-between-two-points-on-a-cone/sssss1dt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/path-between-two-points-on-a-cone/sssss1dt"/>
      <lastmod>2026-11-01T19:11:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/path-between-two-points-on-a-cone/sssss1dt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/path-between-two-points-on-a-cone/sssss1dt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/path-between-two-points-on-a-cone/sssss1dt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/path-between-two-points-on-a-cone/sssss1dt"/>
      <lastmod>2026-11-01T19:11:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inputs-and-outputs-parametric-practice/sssss1dx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inputs-and-outputs-parametric-practice/sssss1dx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inputs-and-outputs-parametric-practice/sssss1dx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inputs-and-outputs-parametric-practice/sssss1dx"/>
      <lastmod>2026-11-01T22:56:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inputs-and-outputs-parametric-practice/sssss1dx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inputs-and-outputs-parametric-practice/sssss1dx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inputs-and-outputs-parametric-practice/sssss1dx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inputs-and-outputs-parametric-practice/sssss1dx"/>
      <lastmod>2026-11-01T22:56:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrate-addition/sssss1di</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrate-addition/sssss1di"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrate-addition/sssss1di"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrate-addition/sssss1di"/>
      <lastmod>2026-11-02T11:45:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrate-addition/sssss1di</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrate-addition/sssss1di"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrate-addition/sssss1di"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrate-addition/sssss1di"/>
      <lastmod>2026-11-02T11:45:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-by-mark-willis/sssss1do</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-mark-willis/sssss1do"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-mark-willis/sssss1do"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-mark-willis/sssss1do"/>
      <lastmod>2026-11-02T03:06:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-by-mark-willis/sssss1do</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-mark-willis/sssss1do"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-mark-willis/sssss1do"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-mark-willis/sssss1do"/>
      <lastmod>2026-11-02T03:06:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-multiplication-of-positive-and-negative-numbers/sssss1fs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-multiplication-of-positive-and-negative-numbers/sssss1fs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-multiplication-of-positive-and-negative-numbers/sssss1fs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-multiplication-of-positive-and-negative-numbers/sssss1fs"/>
      <lastmod>2026-11-01T21:14:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-multiplication-of-positive-and-negative-numbers/sssss1fs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-multiplication-of-positive-and-negative-numbers/sssss1fs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-multiplication-of-positive-and-negative-numbers/sssss1fs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-multiplication-of-positive-and-negative-numbers/sssss1fs"/>
      <lastmod>2026-11-01T21:14:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-and-circle-area/sssss1f7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-and-circle-area/sssss1f7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-and-circle-area/sssss1f7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-and-circle-area/sssss1f7"/>
      <lastmod>2026-11-02T18:50:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-and-circle-area/sssss1f7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-and-circle-area/sssss1f7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-and-circle-area/sssss1f7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-and-circle-area/sssss1f7"/>
      <lastmod>2026-11-02T18:50:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-construction-with-similarity-transformation-and-circles/sssss1fn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-construction-with-similarity-transformation-and-circles/sssss1fn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-construction-with-similarity-transformation-and-circles/sssss1fn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-construction-with-similarity-transformation-and-circles/sssss1fn"/>
      <lastmod>2026-11-02T18:10:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-construction-with-similarity-transformation-and-circles/sssss1fn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-construction-with-similarity-transformation-and-circles/sssss1fn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-construction-with-similarity-transformation-and-circles/sssss1fn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-construction-with-similarity-transformation-and-circles/sssss1fn"/>
      <lastmod>2026-11-02T18:10:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integration-volume-of-solids/sssss1f2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-volume-of-solids/sssss1f2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-volume-of-solids/sssss1f2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-volume-of-solids/sssss1f2"/>
      <lastmod>2026-11-02T18:53:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integration-volume-of-solids/sssss1f2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-volume-of-solids/sssss1f2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-volume-of-solids/sssss1f2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-volume-of-solids/sssss1f2"/>
      <lastmod>2026-11-02T18:53:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/defining-equivalent-ratios/sssss1fk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-equivalent-ratios/sssss1fk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-equivalent-ratios/sssss1fk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-equivalent-ratios/sssss1fk"/>
      <lastmod>2026-11-02T10:38:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/defining-equivalent-ratios/sssss1fk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-equivalent-ratios/sssss1fk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-equivalent-ratios/sssss1fk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-equivalent-ratios/sssss1fk"/>
      <lastmod>2026-11-02T10:38:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformed-power-functions/sssss1fz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformed-power-functions/sssss1fz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformed-power-functions/sssss1fz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformed-power-functions/sssss1fz"/>
      <lastmod>2026-11-02T18:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformed-power-functions/sssss1fz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformed-power-functions/sssss1fz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformed-power-functions/sssss1fz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformed-power-functions/sssss1fz"/>
      <lastmod>2026-11-02T18:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-volumes-by-known-cross-sections/sssss1f0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volumes-by-known-cross-sections/sssss1f0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volumes-by-known-cross-sections/sssss1f0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volumes-by-known-cross-sections/sssss1f0"/>
      <lastmod>2026-11-01T19:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-volumes-by-known-cross-sections/sssss1f0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volumes-by-known-cross-sections/sssss1f0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volumes-by-known-cross-sections/sssss1f0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volumes-by-known-cross-sections/sssss1f0"/>
      <lastmod>2026-11-01T19:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-layer-geometric-construction/sssss1fd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-layer-geometric-construction/sssss1fd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-layer-geometric-construction/sssss1fd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-layer-geometric-construction/sssss1fd"/>
      <lastmod>2026-11-01T20:49:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-layer-geometric-construction/sssss1fd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-layer-geometric-construction/sssss1fd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-layer-geometric-construction/sssss1fd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-layer-geometric-construction/sssss1fd"/>
      <lastmod>2026-11-01T20:49:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-system-example/sssss1ff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-system-example/sssss1ff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-system-example/sssss1ff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-system-example/sssss1ff"/>
      <lastmod>2026-11-01T21:31:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-system-example/sssss1ff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-system-example/sssss1ff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-system-example/sssss1ff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-system-example/sssss1ff"/>
      <lastmod>2026-11-01T21:31:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-parabolas/sssss1f8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-parabolas/sssss1f8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-parabolas/sssss1f8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-parabolas/sssss1f8"/>
      <lastmod>2026-11-02T16:43:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-parabolas/sssss1f8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-parabolas/sssss1f8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-parabolas/sssss1f8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-parabolas/sssss1f8"/>
      <lastmod>2026-11-02T16:43:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/section-of-a-right-circular-cone/sssss1fu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/section-of-a-right-circular-cone/sssss1fu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/section-of-a-right-circular-cone/sssss1fu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/section-of-a-right-circular-cone/sssss1fu"/>
      <lastmod>2026-11-01T21:19:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/section-of-a-right-circular-cone/sssss1fu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/section-of-a-right-circular-cone/sssss1fu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/section-of-a-right-circular-cone/sssss1fu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/section-of-a-right-circular-cone/sssss1fu"/>
      <lastmod>2026-11-01T21:19:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-max-on-the-diagonal-of-a-cube/sssss1f5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-max-on-the-diagonal-of-a-cube/sssss1f5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-max-on-the-diagonal-of-a-cube/sssss1f5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-max-on-the-diagonal-of-a-cube/sssss1f5"/>
      <lastmod>2026-11-02T16:43:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-max-on-the-diagonal-of-a-cube/sssss1f5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-max-on-the-diagonal-of-a-cube/sssss1f5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-max-on-the-diagonal-of-a-cube/sssss1f5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-max-on-the-diagonal-of-a-cube/sssss1f5"/>
      <lastmod>2026-11-02T16:43:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curve-stitching-with-parabolas/sssss1fb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching-with-parabolas/sssss1fb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-with-parabolas/sssss1fb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching-with-parabolas/sssss1fb"/>
      <lastmod>2026-11-02T00:55:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curve-stitching-with-parabolas/sssss1fb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching-with-parabolas/sssss1fb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-with-parabolas/sssss1fb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching-with-parabolas/sssss1fb"/>
      <lastmod>2026-11-02T00:55:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-root-f-x-k-vertical-translation-demo/sssss1f3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-f-x-k-vertical-translation-demo/sssss1f3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-f-x-k-vertical-translation-demo/sssss1f3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-f-x-k-vertical-translation-demo/sssss1f3"/>
      <lastmod>2026-11-02T18:06:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-root-f-x-k-vertical-translation-demo/sssss1f3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-f-x-k-vertical-translation-demo/sssss1f3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-f-x-k-vertical-translation-demo/sssss1f3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-f-x-k-vertical-translation-demo/sssss1f3"/>
      <lastmod>2026-11-02T18:06:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-inequalities-with-2-variables-quiz-by-kusai/sssss1fq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-with-2-variables-quiz-by-kusai/sssss1fq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-inequalities-with-2-variables-quiz-by-kusai/sssss1fq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-with-2-variables-quiz-by-kusai/sssss1fq"/>
      <lastmod>2026-11-01T21:20:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-inequalities-with-2-variables-quiz-by-kusai/sssss1fq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-with-2-variables-quiz-by-kusai/sssss1fq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-inequalities-with-2-variables-quiz-by-kusai/sssss1fq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-with-2-variables-quiz-by-kusai/sssss1fq"/>
      <lastmod>2026-11-01T21:20:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distinguishing-two-types-of-situations-example/sssss1f1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distinguishing-two-types-of-situations-example/sssss1f1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distinguishing-two-types-of-situations-example/sssss1f1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distinguishing-two-types-of-situations-example/sssss1f1"/>
      <lastmod>2026-11-02T10:36:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distinguishing-two-types-of-situations-example/sssss1f1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distinguishing-two-types-of-situations-example/sssss1f1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distinguishing-two-types-of-situations-example/sssss1f1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distinguishing-two-types-of-situations-example/sssss1f1"/>
      <lastmod>2026-11-02T10:36:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-inequalities-by-gabriel-cheow/sssss1fm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-gabriel-cheow/sssss1fm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-by-gabriel-cheow/sssss1fm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-gabriel-cheow/sssss1fm"/>
      <lastmod>2026-11-01T19:25:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-inequalities-by-gabriel-cheow/sssss1fm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-gabriel-cheow/sssss1fm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-by-gabriel-cheow/sssss1fm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-gabriel-cheow/sssss1fm"/>
      <lastmod>2026-11-01T19:25:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3-isosceles-triangles-with-common-vertex-and-vertex-angle/sssss1fj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3-isosceles-triangles-with-common-vertex-and-vertex-angle/sssss1fj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3-isosceles-triangles-with-common-vertex-and-vertex-angle/sssss1fj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3-isosceles-triangles-with-common-vertex-and-vertex-angle/sssss1fj"/>
      <lastmod>2026-11-02T17:05:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3-isosceles-triangles-with-common-vertex-and-vertex-angle/sssss1fj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3-isosceles-triangles-with-common-vertex-and-vertex-angle/sssss1fj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3-isosceles-triangles-with-common-vertex-and-vertex-angle/sssss1fj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3-isosceles-triangles-with-common-vertex-and-vertex-angle/sssss1fj"/>
      <lastmod>2026-11-02T17:05:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/google-logo-geometric-construction/sssss1fp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/google-logo-geometric-construction/sssss1fp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/google-logo-geometric-construction/sssss1fp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/google-logo-geometric-construction/sssss1fp"/>
      <lastmod>2026-11-01T21:30:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/google-logo-geometric-construction/sssss1fp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/google-logo-geometric-construction/sssss1fp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/google-logo-geometric-construction/sssss1fp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/google-logo-geometric-construction/sssss1fp"/>
      <lastmod>2026-11-01T21:30:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-net-by-wilson/sssss1fw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-net-by-wilson/sssss1fw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-net-by-wilson/sssss1fw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-net-by-wilson/sssss1fw"/>
      <lastmod>2026-11-02T18:45:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-net-by-wilson/sssss1fw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-net-by-wilson/sssss1fw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-net-by-wilson/sssss1fw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-net-by-wilson/sssss1fw"/>
      <lastmod>2026-11-02T18:45:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-and-volume-of-rectangular-prisms/sssss1f6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-rectangular-prisms/sssss1f6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-volume-of-rectangular-prisms/sssss1f6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-rectangular-prisms/sssss1f6"/>
      <lastmod>2026-11-02T16:38:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-and-volume-of-rectangular-prisms/sssss1f6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-rectangular-prisms/sssss1f6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-volume-of-rectangular-prisms/sssss1f6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-rectangular-prisms/sssss1f6"/>
      <lastmod>2026-11-02T16:38:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-auxiliary-objects-example/sssss1fg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-auxiliary-objects-example/sssss1fg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-auxiliary-objects-example/sssss1fg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-auxiliary-objects-example/sssss1fg"/>
      <lastmod>2026-11-01T21:33:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-auxiliary-objects-example/sssss1fg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-auxiliary-objects-example/sssss1fg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-auxiliary-objects-example/sssss1fg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-auxiliary-objects-example/sssss1fg"/>
      <lastmod>2026-11-01T21:33:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-parts-of-a-cube-by-ren-ta-v-gov-2/sssss1f9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-parts-of-a-cube-by-ren-ta-v-gov-2/sssss1f9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-parts-of-a-cube-by-ren-ta-v-gov-2/sssss1f9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-parts-of-a-cube-by-ren-ta-v-gov-2/sssss1f9"/>
      <lastmod>2026-11-01T23:23:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-parts-of-a-cube-by-ren-ta-v-gov-2/sssss1f9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-parts-of-a-cube-by-ren-ta-v-gov-2/sssss1f9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-parts-of-a-cube-by-ren-ta-v-gov-2/sssss1f9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-parts-of-a-cube-by-ren-ta-v-gov-2/sssss1f9"/>
      <lastmod>2026-11-01T23:23:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-colored-with-varignon-motifs/sssss1fe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-colored-with-varignon-motifs/sssss1fe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-colored-with-varignon-motifs/sssss1fe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-colored-with-varignon-motifs/sssss1fe"/>
      <lastmod>2026-11-01T20:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-colored-with-varignon-motifs/sssss1fe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-colored-with-varignon-motifs/sssss1fe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-colored-with-varignon-motifs/sssss1fe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-colored-with-varignon-motifs/sssss1fe"/>
      <lastmod>2026-11-01T20:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-rmann/sssss1fv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-rmann/sssss1fv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-rmann/sssss1fv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-rmann/sssss1fv"/>
      <lastmod>2026-11-02T03:11:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-rmann/sssss1fv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-rmann/sssss1fv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-rmann/sssss1fv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-rmann/sssss1fv"/>
      <lastmod>2026-11-02T03:11:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/axis-of-symmetry-in-the-spanish-alphabet/sssss1f4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axis-of-symmetry-in-the-spanish-alphabet/sssss1f4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axis-of-symmetry-in-the-spanish-alphabet/sssss1f4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axis-of-symmetry-in-the-spanish-alphabet/sssss1f4"/>
      <lastmod>2026-11-01T20:47:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/axis-of-symmetry-in-the-spanish-alphabet/sssss1f4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axis-of-symmetry-in-the-spanish-alphabet/sssss1f4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axis-of-symmetry-in-the-spanish-alphabet/sssss1f4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axis-of-symmetry-in-the-spanish-alphabet/sssss1f4"/>
      <lastmod>2026-11-01T20:47:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-logic-by-didier-villanueva-basto/sssss1fl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-by-didier-villanueva-basto/sssss1fl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-logic-by-didier-villanueva-basto/sssss1fl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-by-didier-villanueva-basto/sssss1fl"/>
      <lastmod>2026-11-02T00:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-logic-by-didier-villanueva-basto/sssss1fl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-by-didier-villanueva-basto/sssss1fl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-logic-by-didier-villanueva-basto/sssss1fl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-by-didier-villanueva-basto/sssss1fl"/>
      <lastmod>2026-11-02T00:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-meaning-of-0-r-1/sssss1fy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-0-r-1/sssss1fy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-meaning-of-0-r-1/sssss1fy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-0-r-1/sssss1fy"/>
      <lastmod>2026-11-02T13:36:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-meaning-of-0-r-1/sssss1fy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-0-r-1/sssss1fy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-meaning-of-0-r-1/sssss1fy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-0-r-1/sssss1fy"/>
      <lastmod>2026-11-02T13:36:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-rectangles/sssss1fa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-rectangles/sssss1fa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-rectangles/sssss1fa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-rectangles/sssss1fa"/>
      <lastmod>2026-11-02T02:55:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-rectangles/sssss1fa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-rectangles/sssss1fa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-rectangles/sssss1fa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-rectangles/sssss1fa"/>
      <lastmod>2026-11-02T02:55:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wave-form-by-mathieu-blossier/sssss1fc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-form-by-mathieu-blossier/sssss1fc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-form-by-mathieu-blossier/sssss1fc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-form-by-mathieu-blossier/sssss1fc"/>
      <lastmod>2026-11-02T16:35:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wave-form-by-mathieu-blossier/sssss1fc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-form-by-mathieu-blossier/sssss1fc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-form-by-mathieu-blossier/sssss1fc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-form-by-mathieu-blossier/sssss1fc"/>
      <lastmod>2026-11-02T16:35:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/heaviside-dirac-delta-functions/sssss1fr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heaviside-dirac-delta-functions/sssss1fr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heaviside-dirac-delta-functions/sssss1fr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heaviside-dirac-delta-functions/sssss1fr"/>
      <lastmod>2026-11-01T22:09:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/heaviside-dirac-delta-functions/sssss1fr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heaviside-dirac-delta-functions/sssss1fr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heaviside-dirac-delta-functions/sssss1fr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heaviside-dirac-delta-functions/sssss1fr"/>
      <lastmod>2026-11-01T22:09:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-linear-regression/sssss1fh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-linear-regression/sssss1fh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-linear-regression/sssss1fh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-linear-regression/sssss1fh"/>
      <lastmod>2026-11-01T19:28:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-linear-regression/sssss1fh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-linear-regression/sssss1fh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-linear-regression/sssss1fh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-linear-regression/sssss1fh"/>
      <lastmod>2026-11-01T19:28:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-of-real-numbers-and-geometric-construction/sssss1ft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-of-real-numbers-and-geometric-construction/sssss1ft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-of-real-numbers-and-geometric-construction/sssss1ft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-of-real-numbers-and-geometric-construction/sssss1ft"/>
      <lastmod>2026-11-02T00:40:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-of-real-numbers-and-geometric-construction/sssss1ft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-of-real-numbers-and-geometric-construction/sssss1ft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-of-real-numbers-and-geometric-construction/sssss1ft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-of-real-numbers-and-geometric-construction/sssss1ft"/>
      <lastmod>2026-11-02T00:40:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratio-of-areas-of-10-gon/sssss1fx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-of-areas-of-10-gon/sssss1fx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-of-areas-of-10-gon/sssss1fx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-of-areas-of-10-gon/sssss1fx"/>
      <lastmod>2026-11-01T23:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratio-of-areas-of-10-gon/sssss1fx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-of-areas-of-10-gon/sssss1fx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-of-areas-of-10-gon/sssss1fx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-of-areas-of-10-gon/sssss1fx"/>
      <lastmod>2026-11-01T23:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coronavirus-mathematical-model/sssss1fi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coronavirus-mathematical-model/sssss1fi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coronavirus-mathematical-model/sssss1fi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coronavirus-mathematical-model/sssss1fi"/>
      <lastmod>2026-11-01T20:53:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coronavirus-mathematical-model/sssss1fi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coronavirus-mathematical-model/sssss1fi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coronavirus-mathematical-model/sssss1fi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coronavirus-mathematical-model/sssss1fi"/>
      <lastmod>2026-11-01T20:53:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-translations-intro/sssss1fo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-translations-intro/sssss1fo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-translations-intro/sssss1fo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-translations-intro/sssss1fo"/>
      <lastmod>2026-11-01T21:17:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-translations-intro/sssss1fo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-translations-intro/sssss1fo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-translations-intro/sssss1fo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-translations-intro/sssss1fo"/>
      <lastmod>2026-11-01T21:17:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilaterals-kites-discovery-activity/sssss18s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilaterals-kites-discovery-activity/sssss18s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilaterals-kites-discovery-activity/sssss18s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilaterals-kites-discovery-activity/sssss18s"/>
      <lastmod>2026-11-02T15:48:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilaterals-kites-discovery-activity/sssss18s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilaterals-kites-discovery-activity/sssss18s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilaterals-kites-discovery-activity/sssss18s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilaterals-kites-discovery-activity/sssss18s"/>
      <lastmod>2026-11-02T15:48:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithm-rules-demonstration/sssss187</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithm-rules-demonstration/sssss187"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithm-rules-demonstration/sssss187"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithm-rules-demonstration/sssss187"/>
      <lastmod>2026-11-01T21:22:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithm-rules-demonstration/sssss187</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithm-rules-demonstration/sssss187"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithm-rules-demonstration/sssss187"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithm-rules-demonstration/sssss187"/>
      <lastmod>2026-11-01T21:22:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/changing-scales-in-scale-drawings/sssss18n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/changing-scales-in-scale-drawings/sssss18n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/changing-scales-in-scale-drawings/sssss18n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/changing-scales-in-scale-drawings/sssss18n"/>
      <lastmod>2026-11-01T23:04:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/changing-scales-in-scale-drawings/sssss18n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/changing-scales-in-scale-drawings/sssss18n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/changing-scales-in-scale-drawings/sssss18n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/changing-scales-in-scale-drawings/sssss18n"/>
      <lastmod>2026-11-01T23:04:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-does-p-value-affect-the-maximum-sigma/sssss182</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-does-p-value-affect-the-maximum-sigma/sssss182"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-does-p-value-affect-the-maximum-sigma/sssss182"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-does-p-value-affect-the-maximum-sigma/sssss182"/>
      <lastmod>2026-11-02T18:56:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-does-p-value-affect-the-maximum-sigma/sssss182</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-does-p-value-affect-the-maximum-sigma/sssss182"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-does-p-value-affect-the-maximum-sigma/sssss182"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-does-p-value-affect-the-maximum-sigma/sssss182"/>
      <lastmod>2026-11-02T18:56:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-and-volume-of-a-cone/sssss18k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-volume-of-a-cone/sssss18k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-volume-of-a-cone/sssss18k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-volume-of-a-cone/sssss18k"/>
      <lastmod>2026-11-02T17:17:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-and-volume-of-a-cone/sssss18k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-volume-of-a-cone/sssss18k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-volume-of-a-cone/sssss18k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-volume-of-a-cone/sssss18k"/>
      <lastmod>2026-11-02T17:17:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/build-a-circle-radius-diameter-circumference-area/sssss18z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-a-circle-radius-diameter-circumference-area/sssss18z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-a-circle-radius-diameter-circumference-area/sssss18z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-a-circle-radius-diameter-circumference-area/sssss18z"/>
      <lastmod>2026-11-02T17:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/build-a-circle-radius-diameter-circumference-area/sssss18z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-a-circle-radius-diameter-circumference-area/sssss18z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-a-circle-radius-diameter-circumference-area/sssss18z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-a-circle-radius-diameter-circumference-area/sssss18z"/>
      <lastmod>2026-11-02T17:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-ellipse-circle-rahmawati-sma-negeri-03-bombana/sssss180</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-ellipse-circle-rahmawati-sma-negeri-03-bombana/sssss180"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-ellipse-circle-rahmawati-sma-negeri-03-bombana/sssss180"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-ellipse-circle-rahmawati-sma-negeri-03-bombana/sssss180"/>
      <lastmod>2026-11-02T17:40:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-ellipse-circle-rahmawati-sma-negeri-03-bombana/sssss180</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-ellipse-circle-rahmawati-sma-negeri-03-bombana/sssss180"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-ellipse-circle-rahmawati-sma-negeri-03-bombana/sssss180"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-ellipse-circle-rahmawati-sma-negeri-03-bombana/sssss180"/>
      <lastmod>2026-11-02T17:40:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-and-congruence-6/sssss18d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-and-congruence-6/sssss18d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-and-congruence-6/sssss18d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-and-congruence-6/sssss18d"/>
      <lastmod>2026-11-02T09:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-and-congruence-6/sssss18d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-and-congruence-6/sssss18d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-and-congruence-6/sssss18d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-and-congruence-6/sssss18d"/>
      <lastmod>2026-11-02T09:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standardize-gas-volume/sssss18f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standardize-gas-volume/sssss18f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standardize-gas-volume/sssss18f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standardize-gas-volume/sssss18f"/>
      <lastmod>2026-11-02T02:49:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standardize-gas-volume/sssss18f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standardize-gas-volume/sssss18f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standardize-gas-volume/sssss18f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standardize-gas-volume/sssss18f"/>
      <lastmod>2026-11-02T02:49:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gravitation-and-space-curvature-in-3d/sssss188</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gravitation-and-space-curvature-in-3d/sssss188"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gravitation-and-space-curvature-in-3d/sssss188"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gravitation-and-space-curvature-in-3d/sssss188"/>
      <lastmod>2026-11-01T19:04:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gravitation-and-space-curvature-in-3d/sssss188</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gravitation-and-space-curvature-in-3d/sssss188"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gravitation-and-space-curvature-in-3d/sssss188"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gravitation-and-space-curvature-in-3d/sssss188"/>
      <lastmod>2026-11-01T19:04:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/guess-the-correlation-coefficient/sssss18u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/guess-the-correlation-coefficient/sssss18u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/guess-the-correlation-coefficient/sssss18u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/guess-the-correlation-coefficient/sssss18u"/>
      <lastmod>2026-11-01T19:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/guess-the-correlation-coefficient/sssss18u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/guess-the-correlation-coefficient/sssss18u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/guess-the-correlation-coefficient/sssss18u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/guess-the-correlation-coefficient/sssss18u"/>
      <lastmod>2026-11-01T19:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-parallelograms-demo/sssss185</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-parallelograms-demo/sssss185"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-parallelograms-demo/sssss185"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-parallelograms-demo/sssss185"/>
      <lastmod>2026-11-02T13:02:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-parallelograms-demo/sssss185</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-parallelograms-demo/sssss185"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-parallelograms-demo/sssss185"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-parallelograms-demo/sssss185"/>
      <lastmod>2026-11-02T13:02:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-the-toyota-aygo-logo-in-2d-geometry/sssss18b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-the-toyota-aygo-logo-in-2d-geometry/sssss18b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-the-toyota-aygo-logo-in-2d-geometry/sssss18b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-the-toyota-aygo-logo-in-2d-geometry/sssss18b"/>
      <lastmod>2026-11-02T10:38:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-the-toyota-aygo-logo-in-2d-geometry/sssss18b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-the-toyota-aygo-logo-in-2d-geometry/sssss18b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-the-toyota-aygo-logo-in-2d-geometry/sssss18b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-the-toyota-aygo-logo-in-2d-geometry/sssss18b"/>
      <lastmod>2026-11-02T10:38:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-vectors-and-circle-construction/sssss183</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vectors-and-circle-construction/sssss183"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vectors-and-circle-construction/sssss183"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vectors-and-circle-construction/sssss183"/>
      <lastmod>2026-11-01T21:24:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-vectors-and-circle-construction/sssss183</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vectors-and-circle-construction/sssss183"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vectors-and-circle-construction/sssss183"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vectors-and-circle-construction/sssss183"/>
      <lastmod>2026-11-01T21:24:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-net/sssss18q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-net/sssss18q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-construction-and-net/sssss18q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-net/sssss18q"/>
      <lastmod>2026-11-02T07:01:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-prism-construction-and-net/sssss18q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-net/sssss18q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-construction-and-net/sssss18q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-net/sssss18q"/>
      <lastmod>2026-11-02T07:01:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-folding-surface/sssss181</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-folding-surface/sssss181"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-folding-surface/sssss181"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-folding-surface/sssss181"/>
      <lastmod>2026-11-02T09:35:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-folding-surface/sssss181</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-folding-surface/sssss181"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-folding-surface/sssss181"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-folding-surface/sssss181"/>
      <lastmod>2026-11-02T09:35:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/morphing-polyhedron/sssss18m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/morphing-polyhedron/sssss18m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/morphing-polyhedron/sssss18m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/morphing-polyhedron/sssss18m"/>
      <lastmod>2026-11-01T23:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/morphing-polyhedron/sssss18m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/morphing-polyhedron/sssss18m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/morphing-polyhedron/sssss18m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/morphing-polyhedron/sssss18m"/>
      <lastmod>2026-11-01T23:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-demonstration-of-complex-number-c-1-25-0i/sssss18j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-complex-number-c-1-25-0i/sssss18j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-demonstration-of-complex-number-c-1-25-0i/sssss18j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-complex-number-c-1-25-0i/sssss18j"/>
      <lastmod>2026-11-01T21:10:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-demonstration-of-complex-number-c-1-25-0i/sssss18j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-complex-number-c-1-25-0i/sssss18j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-demonstration-of-complex-number-c-1-25-0i/sssss18j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-complex-number-c-1-25-0i/sssss18j"/>
      <lastmod>2026-11-01T21:10:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/luiz-sacilotto-s-art-and-mathematics-integration/sssss18p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/luiz-sacilotto-s-art-and-mathematics-integration/sssss18p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/luiz-sacilotto-s-art-and-mathematics-integration/sssss18p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/luiz-sacilotto-s-art-and-mathematics-integration/sssss18p"/>
      <lastmod>2026-11-02T11:04:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/luiz-sacilotto-s-art-and-mathematics-integration/sssss18p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/luiz-sacilotto-s-art-and-mathematics-integration/sssss18p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/luiz-sacilotto-s-art-and-mathematics-integration/sssss18p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/luiz-sacilotto-s-art-and-mathematics-integration/sssss18p"/>
      <lastmod>2026-11-02T11:04:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/additional-fractions-per-unit-part-1/sssss18w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/additional-fractions-per-unit-part-1/sssss18w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/additional-fractions-per-unit-part-1/sssss18w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/additional-fractions-per-unit-part-1/sssss18w"/>
      <lastmod>2026-11-01T19:10:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/additional-fractions-per-unit-part-1/sssss18w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/additional-fractions-per-unit-part-1/sssss18w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/additional-fractions-per-unit-part-1/sssss18w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/additional-fractions-per-unit-part-1/sssss18w"/>
      <lastmod>2026-11-01T19:10:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lissajous-curve-generator-by-mark-kaercher/sssss186</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lissajous-curve-generator-by-mark-kaercher/sssss186"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lissajous-curve-generator-by-mark-kaercher/sssss186"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lissajous-curve-generator-by-mark-kaercher/sssss186"/>
      <lastmod>2026-11-01T21:29:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lissajous-curve-generator-by-mark-kaercher/sssss186</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lissajous-curve-generator-by-mark-kaercher/sssss186"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lissajous-curve-generator-by-mark-kaercher/sssss186"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lissajous-curve-generator-by-mark-kaercher/sssss186"/>
      <lastmod>2026-11-01T21:29:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-illustration-of-derivative-function/sssss18g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-illustration-of-derivative-function/sssss18g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-illustration-of-derivative-function/sssss18g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-illustration-of-derivative-function/sssss18g"/>
      <lastmod>2026-11-02T16:52:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-illustration-of-derivative-function/sssss18g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-illustration-of-derivative-function/sssss18g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-illustration-of-derivative-function/sssss18g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-illustration-of-derivative-function/sssss18g"/>
      <lastmod>2026-11-02T16:52:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-terms/sssss189</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-terms/sssss189"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-terms/sssss189"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-terms/sssss189"/>
      <lastmod>2026-11-02T16:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-terms/sssss189</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-terms/sssss189"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-terms/sssss189"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-terms/sssss189"/>
      <lastmod>2026-11-02T16:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-angles-in-a-triangle/sssss18e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-angles-in-a-triangle/sssss18e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-angles-in-a-triangle/sssss18e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-angles-in-a-triangle/sssss18e"/>
      <lastmod>2026-11-02T10:38:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-angles-in-a-triangle/sssss18e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-angles-in-a-triangle/sssss18e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-angles-in-a-triangle/sssss18e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-angles-in-a-triangle/sssss18e"/>
      <lastmod>2026-11-02T10:38:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discrete-to-continuous-hyperbola/sssss18v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discrete-to-continuous-hyperbola/sssss18v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discrete-to-continuous-hyperbola/sssss18v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discrete-to-continuous-hyperbola/sssss18v"/>
      <lastmod>2026-11-02T16:32:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discrete-to-continuous-hyperbola/sssss18v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discrete-to-continuous-hyperbola/sssss18v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discrete-to-continuous-hyperbola/sssss18v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discrete-to-continuous-hyperbola/sssss18v"/>
      <lastmod>2026-11-02T16:32:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-lines-skew-lines-and-parallel-planes/sssss184</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-skew-lines-and-parallel-planes/sssss184"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-skew-lines-and-parallel-planes/sssss184"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-skew-lines-and-parallel-planes/sssss184"/>
      <lastmod>2026-11-02T13:55:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-lines-skew-lines-and-parallel-planes/sssss184</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-skew-lines-and-parallel-planes/sssss184"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-skew-lines-and-parallel-planes/sssss184"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-skew-lines-and-parallel-planes/sssss184"/>
      <lastmod>2026-11-02T13:55:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-and-properties/sssss18l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-and-properties/sssss18l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-and-properties/sssss18l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-and-properties/sssss18l"/>
      <lastmod>2026-11-01T21:17:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-and-properties/sssss18l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-and-properties/sssss18l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-and-properties/sssss18l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-and-properties/sssss18l"/>
      <lastmod>2026-11-01T21:17:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-hyperbola/sssss18y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-hyperbola/sssss18y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-hyperbola/sssss18y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-hyperbola/sssss18y"/>
      <lastmod>2026-11-02T09:32:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-hyperbola/sssss18y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-hyperbola/sssss18y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-hyperbola/sssss18y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-hyperbola/sssss18y"/>
      <lastmod>2026-11-02T09:32:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruent-arcs-and-arc-addition/sssss18a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-arcs-and-arc-addition/sssss18a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-arcs-and-arc-addition/sssss18a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-arcs-and-arc-addition/sssss18a"/>
      <lastmod>2026-11-01T21:09:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruent-arcs-and-arc-addition/sssss18a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-arcs-and-arc-addition/sssss18a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-arcs-and-arc-addition/sssss18a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-arcs-and-arc-addition/sssss18a"/>
      <lastmod>2026-11-01T21:09:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-cylinder-vs-cone-gmd-3/sssss18c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-cylinder-vs-cone-gmd-3/sssss18c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-cylinder-vs-cone-gmd-3/sssss18c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-cylinder-vs-cone-gmd-3/sssss18c"/>
      <lastmod>2026-11-02T02:45:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-cylinder-vs-cone-gmd-3/sssss18c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-cylinder-vs-cone-gmd-3/sssss18c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-cylinder-vs-cone-gmd-3/sssss18c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-cylinder-vs-cone-gmd-3/sssss18c"/>
      <lastmod>2026-11-02T02:45:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-sine-function-by-paul-sutton/sssss18r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-function-by-paul-sutton/sssss18r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-function-by-paul-sutton/sssss18r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-function-by-paul-sutton/sssss18r"/>
      <lastmod>2026-11-02T13:55:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-sine-function-by-paul-sutton/sssss18r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-function-by-paul-sutton/sssss18r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-function-by-paul-sutton/sssss18r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-function-by-paul-sutton/sssss18r"/>
      <lastmod>2026-11-02T13:55:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/measuring-angles-with-a-protractor-by-ryan-smith/sssss18h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-angles-with-a-protractor-by-ryan-smith/sssss18h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-angles-with-a-protractor-by-ryan-smith/sssss18h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-angles-with-a-protractor-by-ryan-smith/sssss18h"/>
      <lastmod>2026-11-01T23:09:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/measuring-angles-with-a-protractor-by-ryan-smith/sssss18h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-angles-with-a-protractor-by-ryan-smith/sssss18h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-angles-with-a-protractor-by-ryan-smith/sssss18h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-angles-with-a-protractor-by-ryan-smith/sssss18h"/>
      <lastmod>2026-11-01T23:09:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan/sssss18t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan/sssss18t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-demonstration-by-d-jayaseelan/sssss18t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan/sssss18t"/>
      <lastmod>2026-11-02T16:29:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-subtraction-demonstration-by-d-jayaseelan/sssss18t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan/sssss18t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-demonstration-by-d-jayaseelan/sssss18t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan/sssss18t"/>
      <lastmod>2026-11-02T16:29:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebra-2-exponents-roots-and-logs-examples/sssss18x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-exponents-roots-and-logs-examples/sssss18x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-exponents-roots-and-logs-examples/sssss18x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-exponents-roots-and-logs-examples/sssss18x"/>
      <lastmod>2026-11-01T23:44:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebra-2-exponents-roots-and-logs-examples/sssss18x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-exponents-roots-and-logs-examples/sssss18x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-exponents-roots-and-logs-examples/sssss18x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-exponents-roots-and-logs-examples/sssss18x"/>
      <lastmod>2026-11-01T23:44:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-prism-volume-investigation/sssss18i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-volume-investigation/sssss18i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-volume-investigation/sssss18i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-volume-investigation/sssss18i"/>
      <lastmod>2026-11-02T13:50:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-prism-volume-investigation/sssss18i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-volume-investigation/sssss18i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-volume-investigation/sssss18i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-volume-investigation/sssss18i"/>
      <lastmod>2026-11-02T13:50:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-segment-theorem/sssss18o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-segment-theorem/sssss18o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-segment-theorem/sssss18o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-segment-theorem/sssss18o"/>
      <lastmod>2026-11-01T19:13:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-segment-theorem/sssss18o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-segment-theorem/sssss18o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-segment-theorem/sssss18o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-segment-theorem/sssss18o"/>
      <lastmod>2026-11-01T19:13:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/build-the-net-of-a-pyramid/sssss1us</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-the-net-of-a-pyramid/sssss1us"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-the-net-of-a-pyramid/sssss1us"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-the-net-of-a-pyramid/sssss1us"/>
      <lastmod>2026-11-02T00:43:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/build-the-net-of-a-pyramid/sssss1us</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-the-net-of-a-pyramid/sssss1us"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-the-net-of-a-pyramid/sssss1us"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-the-net-of-a-pyramid/sssss1us"/>
      <lastmod>2026-11-02T00:43:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-the-image-after-reflection/sssss1u7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-the-image-after-reflection/sssss1u7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-the-image-after-reflection/sssss1u7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-the-image-after-reflection/sssss1u7"/>
      <lastmod>2026-11-01T20:40:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-the-image-after-reflection/sssss1u7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-the-image-after-reflection/sssss1u7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-the-image-after-reflection/sssss1u7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-the-image-after-reflection/sssss1u7"/>
      <lastmod>2026-11-01T20:40:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fehr-problem-9-geogebra-visualization/sssss1un</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fehr-problem-9-geogebra-visualization/sssss1un"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fehr-problem-9-geogebra-visualization/sssss1un"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fehr-problem-9-geogebra-visualization/sssss1un"/>
      <lastmod>2026-11-02T16:36:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fehr-problem-9-geogebra-visualization/sssss1un</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fehr-problem-9-geogebra-visualization/sssss1un"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fehr-problem-9-geogebra-visualization/sssss1un"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fehr-problem-9-geogebra-visualization/sssss1un"/>
      <lastmod>2026-11-02T16:36:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euler-line/sssss1u2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-line/sssss1u2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-line/sssss1u2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-line/sssss1u2"/>
      <lastmod>2026-11-02T02:53:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euler-line/sssss1u2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-line/sssss1u2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-line/sssss1u2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-line/sssss1u2"/>
      <lastmod>2026-11-02T02:53:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-transformations/sssss1uk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-transformations/sssss1uk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-transformations/sssss1uk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-transformations/sssss1uk"/>
      <lastmod>2026-11-02T16:56:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-transformations/sssss1uk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-transformations/sssss1uk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-transformations/sssss1uk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-transformations/sssss1uk"/>
      <lastmod>2026-11-02T16:56:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangle-ratio-comparison/sssss1uz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-ratio-comparison/sssss1uz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-ratio-comparison/sssss1uz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-ratio-comparison/sssss1uz"/>
      <lastmod>2026-11-01T19:16:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangle-ratio-comparison/sssss1uz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-ratio-comparison/sssss1uz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-ratio-comparison/sssss1uz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-ratio-comparison/sssss1uz"/>
      <lastmod>2026-11-01T19:16:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-an-equilateral-triangle-by-ashley-derrick/sssss1u0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-an-equilateral-triangle-by-ashley-derrick/sssss1u0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-an-equilateral-triangle-by-ashley-derrick/sssss1u0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-an-equilateral-triangle-by-ashley-derrick/sssss1u0"/>
      <lastmod>2026-11-01T21:27:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-an-equilateral-triangle-by-ashley-derrick/sssss1u0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-an-equilateral-triangle-by-ashley-derrick/sssss1u0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-an-equilateral-triangle-by-ashley-derrick/sssss1u0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-an-equilateral-triangle-by-ashley-derrick/sssss1u0"/>
      <lastmod>2026-11-01T21:27:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-multiplication-and-division-exploration/sssss1ud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-multiplication-and-division-exploration/sssss1ud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-multiplication-and-division-exploration/sssss1ud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-multiplication-and-division-exploration/sssss1ud"/>
      <lastmod>2026-11-01T21:32:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-multiplication-and-division-exploration/sssss1ud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-multiplication-and-division-exploration/sssss1ud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-multiplication-and-division-exploration/sssss1ud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-multiplication-and-division-exploration/sssss1ud"/>
      <lastmod>2026-11-01T21:32:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-circle-and-locus/sssss1uf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-circle-and-locus/sssss1uf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-circle-and-locus/sssss1uf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-circle-and-locus/sssss1uf"/>
      <lastmod>2026-11-02T17:02:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-circle-and-locus/sssss1uf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-circle-and-locus/sssss1uf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-circle-and-locus/sssss1uf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-circle-and-locus/sssss1uf"/>
      <lastmod>2026-11-02T17:02:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sas-congruence-theorem/sssss1u8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-congruence-theorem/sssss1u8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-congruence-theorem/sssss1u8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-congruence-theorem/sssss1u8"/>
      <lastmod>2026-11-02T17:58:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sas-congruence-theorem/sssss1u8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-congruence-theorem/sssss1u8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-congruence-theorem/sssss1u8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-congruence-theorem/sssss1u8"/>
      <lastmod>2026-11-02T17:58:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-sine-ratio-concept/sssss1uu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-ratio-concept/sssss1uu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-sine-ratio-concept/sssss1uu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-ratio-concept/sssss1uu"/>
      <lastmod>2026-11-01T23:10:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-sine-ratio-concept/sssss1uu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-ratio-concept/sssss1uu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-sine-ratio-concept/sssss1uu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-ratio-concept/sssss1uu"/>
      <lastmod>2026-11-01T23:10:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-shapes-and-function-graphs/sssss1u5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-shapes-and-function-graphs/sssss1u5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-shapes-and-function-graphs/sssss1u5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-shapes-and-function-graphs/sssss1u5"/>
      <lastmod>2026-11-02T02:30:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-shapes-and-function-graphs/sssss1u5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-shapes-and-function-graphs/sssss1u5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-shapes-and-function-graphs/sssss1u5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-shapes-and-function-graphs/sssss1u5"/>
      <lastmod>2026-11-02T02:30:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-sphere-cone-and-cylinder/sssss1ub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-cone-and-cylinder/sssss1ub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-sphere-cone-and-cylinder/sssss1ub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-cone-and-cylinder/sssss1ub"/>
      <lastmod>2026-11-01T21:36:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-sphere-cone-and-cylinder/sssss1ub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-cone-and-cylinder/sssss1ub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-sphere-cone-and-cylinder/sssss1ub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-cone-and-cylinder/sssss1ub"/>
      <lastmod>2026-11-01T21:36:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/general-quadrilateral-with-trigonometry/sssss1u3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-quadrilateral-with-trigonometry/sssss1u3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-quadrilateral-with-trigonometry/sssss1u3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-quadrilateral-with-trigonometry/sssss1u3"/>
      <lastmod>2026-11-01T20:42:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/general-quadrilateral-with-trigonometry/sssss1u3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-quadrilateral-with-trigonometry/sssss1u3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-quadrilateral-with-trigonometry/sssss1u3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-quadrilateral-with-trigonometry/sssss1u3"/>
      <lastmod>2026-11-01T20:42:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/snake-path-in-a-cube/sssss1uq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snake-path-in-a-cube/sssss1uq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snake-path-in-a-cube/sssss1uq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snake-path-in-a-cube/sssss1uq"/>
      <lastmod>2026-11-02T17:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/snake-path-in-a-cube/sssss1uq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snake-path-in-a-cube/sssss1uq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snake-path-in-a-cube/sssss1uq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snake-path-in-a-cube/sssss1uq"/>
      <lastmod>2026-11-02T17:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-coordinates-by-jonathan-holland/sssss1u1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-jonathan-holland/sssss1u1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-by-jonathan-holland/sssss1u1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-jonathan-holland/sssss1u1"/>
      <lastmod>2026-11-02T18:39:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-coordinates-by-jonathan-holland/sssss1u1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-jonathan-holland/sssss1u1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-by-jonathan-holland/sssss1u1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-jonathan-holland/sssss1u1"/>
      <lastmod>2026-11-02T18:39:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-volume-calculation-demo/sssss1um</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-volume-calculation-demo/sssss1um"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-volume-calculation-demo/sssss1um"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-volume-calculation-demo/sssss1um"/>
      <lastmod>2026-11-02T18:30:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-volume-calculation-demo/sssss1um</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-volume-calculation-demo/sssss1um"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-volume-calculation-demo/sssss1um"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-volume-calculation-demo/sssss1um"/>
      <lastmod>2026-11-02T18:30:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-sine-demonstration/sssss1uj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-sine-demonstration/sssss1uj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-sine-demonstration/sssss1uj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-sine-demonstration/sssss1uj"/>
      <lastmod>2026-11-01T22:01:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-sine-demonstration/sssss1uj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-sine-demonstration/sssss1uj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-sine-demonstration/sssss1uj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-sine-demonstration/sssss1uj"/>
      <lastmod>2026-11-01T22:01:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-surface-area-and-volume-of-cylinder/sssss1up</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-surface-area-and-volume-of-cylinder/sssss1up"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-surface-area-and-volume-of-cylinder/sssss1up"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-surface-area-and-volume-of-cylinder/sssss1up"/>
      <lastmod>2026-11-01T21:28:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-surface-area-and-volume-of-cylinder/sssss1up</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-surface-area-and-volume-of-cylinder/sssss1up"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-surface-area-and-volume-of-cylinder/sssss1up"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-surface-area-and-volume-of-cylinder/sssss1up"/>
      <lastmod>2026-11-01T21:28:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-interactive-geometry-and-functions-combined/sssss1uw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-interactive-geometry-and-functions-combined/sssss1uw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-interactive-geometry-and-functions-combined/sssss1uw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-interactive-geometry-and-functions-combined/sssss1uw"/>
      <lastmod>2026-11-02T00:02:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-interactive-geometry-and-functions-combined/sssss1uw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-interactive-geometry-and-functions-combined/sssss1uw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-interactive-geometry-and-functions-combined/sssss1uw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-interactive-geometry-and-functions-combined/sssss1uw"/>
      <lastmod>2026-11-02T00:02:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/si-function-definite-integral-of-sin-x-x/sssss1u6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/si-function-definite-integral-of-sin-x-x/sssss1u6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/si-function-definite-integral-of-sin-x-x/sssss1u6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/si-function-definite-integral-of-sin-x-x/sssss1u6"/>
      <lastmod>2026-11-02T02:42:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/si-function-definite-integral-of-sin-x-x/sssss1u6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/si-function-definite-integral-of-sin-x-x/sssss1u6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/si-function-definite-integral-of-sin-x-x/sssss1u6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/si-function-definite-integral-of-sin-x-x/sssss1u6"/>
      <lastmod>2026-11-02T02:42:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/newton-s-bucket/sssss1ug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/newton-s-bucket/sssss1ug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/newton-s-bucket/sssss1ug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/newton-s-bucket/sssss1ug"/>
      <lastmod>2026-11-01T21:28:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/newton-s-bucket/sssss1ug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/newton-s-bucket/sssss1ug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/newton-s-bucket/sssss1ug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/newton-s-bucket/sssss1ug"/>
      <lastmod>2026-11-01T21:28:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-mean-in-right-triangles/sssss1u9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-in-right-triangles/sssss1u9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-in-right-triangles/sssss1u9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-in-right-triangles/sssss1u9"/>
      <lastmod>2026-11-01T23:43:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-mean-in-right-triangles/sssss1u9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-in-right-triangles/sssss1u9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-in-right-triangles/sssss1u9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-in-right-triangles/sssss1u9"/>
      <lastmod>2026-11-01T23:43:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example-9-4-1/sssss1ue</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example-9-4-1/sssss1ue"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-planes-and-linear-approximations-example-9-4-1/sssss1ue"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example-9-4-1/sssss1ue"/>
      <lastmod>2026-11-02T18:28:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-planes-and-linear-approximations-example-9-4-1/sssss1ue</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example-9-4-1/sssss1ue"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-planes-and-linear-approximations-example-9-4-1/sssss1ue"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example-9-4-1/sssss1ue"/>
      <lastmod>2026-11-02T18:28:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-tangent-radius-angle/sssss1uv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-tangent-radius-angle/sssss1uv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-tangent-radius-angle/sssss1uv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-tangent-radius-angle/sssss1uv"/>
      <lastmod>2026-11-01T20:46:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-tangent-radius-angle/sssss1uv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-tangent-radius-angle/sssss1uv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-tangent-radius-angle/sssss1uv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-tangent-radius-angle/sssss1uv"/>
      <lastmod>2026-11-01T20:46:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-construction-of-a-triangle-s-incircle-using-vectors/sssss1u4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-a-triangle-s-incircle-using-vectors/sssss1u4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-construction-of-a-triangle-s-incircle-using-vectors/sssss1u4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-a-triangle-s-incircle-using-vectors/sssss1u4"/>
      <lastmod>2026-11-02T00:06:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-construction-of-a-triangle-s-incircle-using-vectors/sssss1u4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-a-triangle-s-incircle-using-vectors/sssss1u4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-construction-of-a-triangle-s-incircle-using-vectors/sssss1u4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-a-triangle-s-incircle-using-vectors/sssss1u4"/>
      <lastmod>2026-11-02T00:06:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/small-network-adjacency-matrices/sssss1ul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/small-network-adjacency-matrices/sssss1ul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/small-network-adjacency-matrices/sssss1ul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/small-network-adjacency-matrices/sssss1ul"/>
      <lastmod>2026-11-02T17:16:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/small-network-adjacency-matrices/sssss1ul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/small-network-adjacency-matrices/sssss1ul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/small-network-adjacency-matrices/sssss1ul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/small-network-adjacency-matrices/sssss1ul"/>
      <lastmod>2026-11-02T17:16:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-slider-centred-slide-origami-animation/sssss1uy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-slider-centred-slide-origami-animation/sssss1uy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-slider-centred-slide-origami-animation/sssss1uy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-slider-centred-slide-origami-animation/sssss1uy"/>
      <lastmod>2026-11-01T20:37:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-slider-centred-slide-origami-animation/sssss1uy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-slider-centred-slide-origami-animation/sssss1uy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-slider-centred-slide-origami-animation/sssss1uy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-slider-centred-slide-origami-animation/sssss1uy"/>
      <lastmod>2026-11-01T20:37:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/world-famous-domes/sssss1ua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/world-famous-domes/sssss1ua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/world-famous-domes/sssss1ua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/world-famous-domes/sssss1ua"/>
      <lastmod>2026-11-01T23:54:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/world-famous-domes/sssss1ua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/world-famous-domes/sssss1ua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/world-famous-domes/sssss1ua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/world-famous-domes/sssss1ua"/>
      <lastmod>2026-11-01T23:54:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-vs-time-addition-subtraction-example/sssss1uc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-vs-time-addition-subtraction-example/sssss1uc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-vs-time-addition-subtraction-example/sssss1uc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-vs-time-addition-subtraction-example/sssss1uc"/>
      <lastmod>2026-11-02T12:00:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-vs-time-addition-subtraction-example/sssss1uc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-vs-time-addition-subtraction-example/sssss1uc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-vs-time-addition-subtraction-example/sssss1uc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-vs-time-addition-subtraction-example/sssss1uc"/>
      <lastmod>2026-11-02T12:00:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/grid-transformations/sssss1ur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/grid-transformations/sssss1ur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/grid-transformations/sssss1ur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/grid-transformations/sssss1ur"/>
      <lastmod>2026-11-01T23:04:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/grid-transformations/sssss1ur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/grid-transformations/sssss1ur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/grid-transformations/sssss1ur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/grid-transformations/sssss1ur"/>
      <lastmod>2026-11-01T23:04:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-coordinates-by-sk2555/sssss1uh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-sk2555/sssss1uh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-by-sk2555/sssss1uh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-sk2555/sssss1uh"/>
      <lastmod>2026-11-02T16:30:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-coordinates-by-sk2555/sssss1uh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-sk2555/sssss1uh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-by-sk2555/sssss1uh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-sk2555/sssss1uh"/>
      <lastmod>2026-11-02T16:30:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-construction-on-a-sphere/sssss1ut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-construction-on-a-sphere/sssss1ut"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-construction-on-a-sphere/sssss1ut"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-construction-on-a-sphere/sssss1ut"/>
      <lastmod>2026-11-02T15:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-construction-on-a-sphere/sssss1ut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-construction-on-a-sphere/sssss1ut"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-construction-on-a-sphere/sssss1ut"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-construction-on-a-sphere/sssss1ut"/>
      <lastmod>2026-11-02T15:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inserting-static-text/sssss1ux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inserting-static-text/sssss1ux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inserting-static-text/sssss1ux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inserting-static-text/sssss1ux"/>
      <lastmod>2026-11-01T21:52:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inserting-static-text/sssss1ux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inserting-static-text/sssss1ux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inserting-static-text/sssss1ux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inserting-static-text/sssss1ux"/>
      <lastmod>2026-11-01T21:52:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/openintro-ahss-probability-example/sssss1ui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/openintro-ahss-probability-example/sssss1ui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/openintro-ahss-probability-example/sssss1ui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/openintro-ahss-probability-example/sssss1ui"/>
      <lastmod>2026-11-02T02:27:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/openintro-ahss-probability-example/sssss1ui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/openintro-ahss-probability-example/sssss1ui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/openintro-ahss-probability-example/sssss1ui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/openintro-ahss-probability-example/sssss1ui"/>
      <lastmod>2026-11-02T02:27:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/flower-petals-rotational-symmetry-demo/sssss1uo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/flower-petals-rotational-symmetry-demo/sssss1uo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/flower-petals-rotational-symmetry-demo/sssss1uo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/flower-petals-rotational-symmetry-demo/sssss1uo"/>
      <lastmod>2026-11-02T18:28:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/flower-petals-rotational-symmetry-demo/sssss1uo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/flower-petals-rotational-symmetry-demo/sssss1uo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/flower-petals-rotational-symmetry-demo/sssss1uo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/flower-petals-rotational-symmetry-demo/sssss1uo"/>
      <lastmod>2026-11-02T18:28:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/build-fit-quadratic-functions-and-their-derivatives/sssss15s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-fit-quadratic-functions-and-their-derivatives/sssss15s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-fit-quadratic-functions-and-their-derivatives/sssss15s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-fit-quadratic-functions-and-their-derivatives/sssss15s"/>
      <lastmod>2026-11-02T17:39:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/build-fit-quadratic-functions-and-their-derivatives/sssss15s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-fit-quadratic-functions-and-their-derivatives/sssss15s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-fit-quadratic-functions-and-their-derivatives/sssss15s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-fit-quadratic-functions-and-their-derivatives/sssss15s"/>
      <lastmod>2026-11-02T17:39:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-congruence-triangle-demo/sssss157</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-triangle-demo/sssss157"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-triangle-demo/sssss157"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-triangle-demo/sssss157"/>
      <lastmod>2026-11-01T23:48:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-congruence-triangle-demo/sssss157</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-triangle-demo/sssss157"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-triangle-demo/sssss157"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-triangle-demo/sssss157"/>
      <lastmod>2026-11-01T23:48:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-hyperbolic-reflection/sssss15n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-hyperbolic-reflection/sssss15n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-hyperbolic-reflection/sssss15n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-hyperbolic-reflection/sssss15n"/>
      <lastmod>2026-11-01T21:00:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-hyperbolic-reflection/sssss15n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-hyperbolic-reflection/sssss15n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-hyperbolic-reflection/sssss15n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-hyperbolic-reflection/sssss15n"/>
      <lastmod>2026-11-01T21:00:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-count-and-geometric-transformations/sssss152</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-count-and-geometric-transformations/sssss152"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-count-and-geometric-transformations/sssss152"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-count-and-geometric-transformations/sssss152"/>
      <lastmod>2026-11-01T23:49:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-count-and-geometric-transformations/sssss152</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-count-and-geometric-transformations/sssss152"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-count-and-geometric-transformations/sssss152"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-count-and-geometric-transformations/sssss152"/>
      <lastmod>2026-11-01T23:49:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-with-cone-construction/sssss15k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-with-cone-construction/sssss15k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-demonstration-with-cone-construction/sssss15k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-with-cone-construction/sssss15k"/>
      <lastmod>2026-11-02T13:17:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-demonstration-with-cone-construction/sssss15k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-with-cone-construction/sssss15k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-demonstration-with-cone-construction/sssss15k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-with-cone-construction/sssss15k"/>
      <lastmod>2026-11-02T13:17:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-exploration-geometric-transformations-and-construction/sssss15z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-exploration-geometric-transformations-and-construction/sssss15z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-exploration-geometric-transformations-and-construction/sssss15z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-exploration-geometric-transformations-and-construction/sssss15z"/>
      <lastmod>2026-11-02T00:34:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-exploration-geometric-transformations-and-construction/sssss15z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-exploration-geometric-transformations-and-construction/sssss15z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-exploration-geometric-transformations-and-construction/sssss15z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-exploration-geometric-transformations-and-construction/sssss15z"/>
      <lastmod>2026-11-02T00:34:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-area-of-a-triangle-2/sssss150</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-area-of-a-triangle-2/sssss150"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-area-of-a-triangle-2/sssss150"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-area-of-a-triangle-2/sssss150"/>
      <lastmod>2026-11-02T02:48:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-area-of-a-triangle-2/sssss150</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-area-of-a-triangle-2/sssss150"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-area-of-a-triangle-2/sssss150"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-area-of-a-triangle-2/sssss150"/>
      <lastmod>2026-11-02T02:48:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-8-9-practice-multi-step-experiments/sssss15d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-8-9-practice-multi-step-experiments/sssss15d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-8-9-practice-multi-step-experiments/sssss15d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-8-9-practice-multi-step-experiments/sssss15d"/>
      <lastmod>2026-11-02T01:59:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-8-9-practice-multi-step-experiments/sssss15d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-8-9-practice-multi-step-experiments/sssss15d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-8-9-practice-multi-step-experiments/sssss15d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-8-9-practice-multi-step-experiments/sssss15d"/>
      <lastmod>2026-11-02T01:59:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arc-length-of-an-ellipse/sssss15f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-of-an-ellipse/sssss15f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-of-an-ellipse/sssss15f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-of-an-ellipse/sssss15f"/>
      <lastmod>2026-11-01T23:27:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arc-length-of-an-ellipse/sssss15f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-of-an-ellipse/sssss15f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-of-an-ellipse/sssss15f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-of-an-ellipse/sssss15f"/>
      <lastmod>2026-11-01T23:27:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-the-air-france-logo-with-fractal-transformations/sssss158</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-air-france-logo-with-fractal-transformations/sssss158"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-air-france-logo-with-fractal-transformations/sssss158"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-air-france-logo-with-fractal-transformations/sssss158"/>
      <lastmod>2026-11-01T21:07:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-the-air-france-logo-with-fractal-transformations/sssss158</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-air-france-logo-with-fractal-transformations/sssss158"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-air-france-logo-with-fractal-transformations/sssss158"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-air-france-logo-with-fractal-transformations/sssss158"/>
      <lastmod>2026-11-01T21:07:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-construction-by-no452/sssss15u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-no452/sssss15u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-by-no452/sssss15u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-no452/sssss15u"/>
      <lastmod>2026-11-02T03:04:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-construction-by-no452/sssss15u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-no452/sssss15u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-by-no452/sssss15u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-no452/sssss15u"/>
      <lastmod>2026-11-02T03:04:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-coefficient-and-parabola-for-a-skater/sssss155</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-coefficient-and-parabola-for-a-skater/sssss155"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-coefficient-and-parabola-for-a-skater/sssss155"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-coefficient-and-parabola-for-a-skater/sssss155"/>
      <lastmod>2026-11-01T19:32:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-coefficient-and-parabola-for-a-skater/sssss155</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-coefficient-and-parabola-for-a-skater/sssss155"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-coefficient-and-parabola-for-a-skater/sssss155"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-coefficient-and-parabola-for-a-skater/sssss155"/>
      <lastmod>2026-11-01T19:32:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygons-practice/sssss15b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygons-practice/sssss15b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygons-practice/sssss15b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygons-practice/sssss15b"/>
      <lastmod>2026-11-01T23:07:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygons-practice/sssss15b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygons-practice/sssss15b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygons-practice/sssss15b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygons-practice/sssss15b"/>
      <lastmod>2026-11-01T23:07:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-double-cone-2/sssss153</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-double-cone-2/sssss153"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-double-cone-2/sssss153"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-double-cone-2/sssss153"/>
      <lastmod>2026-11-01T20:55:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-double-cone-2/sssss153</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-double-cone-2/sssss153"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-double-cone-2/sssss153"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-double-cone-2/sssss153"/>
      <lastmod>2026-11-01T20:55:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-ratios-dynamic-trigonometric-exploration/sssss15q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-ratios-dynamic-trigonometric-exploration/sssss15q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-ratios-dynamic-trigonometric-exploration/sssss15q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-ratios-dynamic-trigonometric-exploration/sssss15q"/>
      <lastmod>2026-11-02T18:02:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-ratios-dynamic-trigonometric-exploration/sssss15q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-ratios-dynamic-trigonometric-exploration/sssss15q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-ratios-dynamic-trigonometric-exploration/sssss15q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-ratios-dynamic-trigonometric-exploration/sssss15q"/>
      <lastmod>2026-11-02T18:02:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-reflective-property/sssss151</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-reflective-property/sssss151"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-reflective-property/sssss151"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-reflective-property/sssss151"/>
      <lastmod>2026-11-01T23:34:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-reflective-property/sssss151</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-reflective-property/sssss151"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-reflective-property/sssss151"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-reflective-property/sssss151"/>
      <lastmod>2026-11-01T23:34:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/classifying-fractions/sssss15m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-fractions/sssss15m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-fractions/sssss15m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-fractions/sssss15m"/>
      <lastmod>2026-11-02T17:02:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/classifying-fractions/sssss15m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-fractions/sssss15m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-fractions/sssss15m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-fractions/sssss15m"/>
      <lastmod>2026-11-02T17:02:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-transformation-and-plane/sssss15j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-transformation-and-plane/sssss15j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-transformation-and-plane/sssss15j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-transformation-and-plane/sssss15j"/>
      <lastmod>2026-11-02T02:47:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-transformation-and-plane/sssss15j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-transformation-and-plane/sssss15j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-transformation-and-plane/sssss15j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-transformation-and-plane/sssss15j"/>
      <lastmod>2026-11-02T02:47:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rekenrek-addition-demo/sssss15p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rekenrek-addition-demo/sssss15p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rekenrek-addition-demo/sssss15p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rekenrek-addition-demo/sssss15p"/>
      <lastmod>2026-11-02T17:01:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rekenrek-addition-demo/sssss15p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rekenrek-addition-demo/sssss15p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rekenrek-addition-demo/sssss15p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rekenrek-addition-demo/sssss15p"/>
      <lastmod>2026-11-02T17:01:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-variant-of-asymmetric-propeller-similar-triangles-in-rotation/sssss15w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-variant-of-asymmetric-propeller-similar-triangles-in-rotation/sssss15w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-variant-of-asymmetric-propeller-similar-triangles-in-rotation/sssss15w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-variant-of-asymmetric-propeller-similar-triangles-in-rotation/sssss15w"/>
      <lastmod>2026-11-02T18:18:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-variant-of-asymmetric-propeller-similar-triangles-in-rotation/sssss15w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-variant-of-asymmetric-propeller-similar-triangles-in-rotation/sssss15w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-variant-of-asymmetric-propeller-similar-triangles-in-rotation/sssss15w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-variant-of-asymmetric-propeller-similar-triangles-in-rotation/sssss15w"/>
      <lastmod>2026-11-02T18:18:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-n-gonal-numbers-a-visual-exploration-with-vectors-and-unit-circle/sssss156</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-n-gonal-numbers-a-visual-exploration-with-vectors-and-unit-circle/sssss156"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-n-gonal-numbers-a-visual-exploration-with-vectors-and-unit-circle/sssss156"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-n-gonal-numbers-a-visual-exploration-with-vectors-and-unit-circle/sssss156"/>
      <lastmod>2026-11-01T19:29:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-n-gonal-numbers-a-visual-exploration-with-vectors-and-unit-circle/sssss156</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-n-gonal-numbers-a-visual-exploration-with-vectors-and-unit-circle/sssss156"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-n-gonal-numbers-a-visual-exploration-with-vectors-and-unit-circle/sssss156"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-n-gonal-numbers-a-visual-exploration-with-vectors-and-unit-circle/sssss156"/>
      <lastmod>2026-11-01T19:29:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sums-of-angles/sssss15g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sums-of-angles/sssss15g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sums-of-angles/sssss15g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sums-of-angles/sssss15g"/>
      <lastmod>2026-11-01T23:38:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sums-of-angles/sssss15g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sums-of-angles/sssss15g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sums-of-angles/sssss15g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sums-of-angles/sssss15g"/>
      <lastmod>2026-11-01T23:38:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-the-interior-structure-of-a-parabola/sssss159</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-the-interior-structure-of-a-parabola/sssss159"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-the-interior-structure-of-a-parabola/sssss159"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-the-interior-structure-of-a-parabola/sssss159"/>
      <lastmod>2026-11-01T23:52:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-the-interior-structure-of-a-parabola/sssss159</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-the-interior-structure-of-a-parabola/sssss159"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-the-interior-structure-of-a-parabola/sssss159"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-the-interior-structure-of-a-parabola/sssss159"/>
      <lastmod>2026-11-01T23:52:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-of-intersection-of-perpendicular-tangents-to-parabola/sssss15e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-intersection-of-perpendicular-tangents-to-parabola/sssss15e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-intersection-of-perpendicular-tangents-to-parabola/sssss15e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-intersection-of-perpendicular-tangents-to-parabola/sssss15e"/>
      <lastmod>2026-11-02T17:38:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-of-intersection-of-perpendicular-tangents-to-parabola/sssss15e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-intersection-of-perpendicular-tangents-to-parabola/sssss15e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-intersection-of-perpendicular-tangents-to-parabola/sssss15e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-intersection-of-perpendicular-tangents-to-parabola/sssss15e"/>
      <lastmod>2026-11-02T17:38:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dandelin-spheres-demo/sssss15v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dandelin-spheres-demo/sssss15v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dandelin-spheres-demo/sssss15v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dandelin-spheres-demo/sssss15v"/>
      <lastmod>2026-11-01T20:54:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dandelin-spheres-demo/sssss15v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dandelin-spheres-demo/sssss15v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dandelin-spheres-demo/sssss15v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dandelin-spheres-demo/sssss15v"/>
      <lastmod>2026-11-01T20:54:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logic-gate-linkage-calculations/sssss154</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logic-gate-linkage-calculations/sssss154"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logic-gate-linkage-calculations/sssss154"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logic-gate-linkage-calculations/sssss154"/>
      <lastmod>2026-11-01T21:07:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logic-gate-linkage-calculations/sssss154</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logic-gate-linkage-calculations/sssss154"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logic-gate-linkage-calculations/sssss154"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logic-gate-linkage-calculations/sssss154"/>
      <lastmod>2026-11-01T21:07:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/max-cone-problem/sssss15l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-cone-problem/sssss15l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-cone-problem/sssss15l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-cone-problem/sssss15l"/>
      <lastmod>2026-11-01T21:59:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/max-cone-problem/sssss15l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-cone-problem/sssss15l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-cone-problem/sssss15l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-cone-problem/sssss15l"/>
      <lastmod>2026-11-01T21:59:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definitions-of-conics-dynamic-demonstration-of-ellipse-hyperbola-and-parabola/sssss15y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definitions-of-conics-dynamic-demonstration-of-ellipse-hyperbola-and-parabola/sssss15y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definitions-of-conics-dynamic-demonstration-of-ellipse-hyperbola-and-parabola/sssss15y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definitions-of-conics-dynamic-demonstration-of-ellipse-hyperbola-and-parabola/sssss15y"/>
      <lastmod>2026-11-02T00:52:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definitions-of-conics-dynamic-demonstration-of-ellipse-hyperbola-and-parabola/sssss15y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definitions-of-conics-dynamic-demonstration-of-ellipse-hyperbola-and-parabola/sssss15y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definitions-of-conics-dynamic-demonstration-of-ellipse-hyperbola-and-parabola/sssss15y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definitions-of-conics-dynamic-demonstration-of-ellipse-hyperbola-and-parabola/sssss15y"/>
      <lastmod>2026-11-02T00:52:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/verify-right-trapezoid/sssss15a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/verify-right-trapezoid/sssss15a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/verify-right-trapezoid/sssss15a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/verify-right-trapezoid/sssss15a"/>
      <lastmod>2026-11-02T18:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/verify-right-trapezoid/sssss15a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/verify-right-trapezoid/sssss15a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/verify-right-trapezoid/sssss15a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/verify-right-trapezoid/sssss15a"/>
      <lastmod>2026-11-02T18:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/custom-solid-with-elliptical-cross-sections-parallel-to-yaxis/sssss15c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/custom-solid-with-elliptical-cross-sections-parallel-to-yaxis/sssss15c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/custom-solid-with-elliptical-cross-sections-parallel-to-yaxis/sssss15c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/custom-solid-with-elliptical-cross-sections-parallel-to-yaxis/sssss15c"/>
      <lastmod>2026-11-02T02:33:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/custom-solid-with-elliptical-cross-sections-parallel-to-yaxis/sssss15c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/custom-solid-with-elliptical-cross-sections-parallel-to-yaxis/sssss15c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/custom-solid-with-elliptical-cross-sections-parallel-to-yaxis/sssss15c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/custom-solid-with-elliptical-cross-sections-parallel-to-yaxis/sssss15c"/>
      <lastmod>2026-11-02T02:33:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bentley-triangle-orthocenter-construction/sssss15r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bentley-triangle-orthocenter-construction/sssss15r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bentley-triangle-orthocenter-construction/sssss15r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bentley-triangle-orthocenter-construction/sssss15r"/>
      <lastmod>2026-11-02T17:10:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bentley-triangle-orthocenter-construction/sssss15r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bentley-triangle-orthocenter-construction/sssss15r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bentley-triangle-orthocenter-construction/sssss15r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bentley-triangle-orthocenter-construction/sssss15r"/>
      <lastmod>2026-11-02T17:10:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-2d-vectors-and-scalene-triangles/sssss15h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-2d-vectors-and-scalene-triangles/sssss15h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-2d-vectors-and-scalene-triangles/sssss15h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-2d-vectors-and-scalene-triangles/sssss15h"/>
      <lastmod>2026-11-01T21:31:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-2d-vectors-and-scalene-triangles/sssss15h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-2d-vectors-and-scalene-triangles/sssss15h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-2d-vectors-and-scalene-triangles/sssss15h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-2d-vectors-and-scalene-triangles/sssss15h"/>
      <lastmod>2026-11-01T21:31:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polyline-construction-and-stochastic-process-visualization/sssss15t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polyline-construction-and-stochastic-process-visualization/sssss15t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polyline-construction-and-stochastic-process-visualization/sssss15t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polyline-construction-and-stochastic-process-visualization/sssss15t"/>
      <lastmod>2026-11-01T21:15:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polyline-construction-and-stochastic-process-visualization/sssss15t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polyline-construction-and-stochastic-process-visualization/sssss15t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polyline-construction-and-stochastic-process-visualization/sssss15t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polyline-construction-and-stochastic-process-visualization/sssss15t"/>
      <lastmod>2026-11-01T21:15:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-variations-demo/sssss15x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-variations-demo/sssss15x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-variations-demo/sssss15x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-variations-demo/sssss15x"/>
      <lastmod>2026-11-01T19:29:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-variations-demo/sssss15x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-variations-demo/sssss15x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-variations-demo/sssss15x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-variations-demo/sssss15x"/>
      <lastmod>2026-11-01T19:29:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-fractions-by-luis-alberto-mosquera/sssss15i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-fractions-by-luis-alberto-mosquera/sssss15i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-fractions-by-luis-alberto-mosquera/sssss15i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-fractions-by-luis-alberto-mosquera/sssss15i"/>
      <lastmod>2026-11-02T16:41:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-fractions-by-luis-alberto-mosquera/sssss15i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-fractions-by-luis-alberto-mosquera/sssss15i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-fractions-by-luis-alberto-mosquera/sssss15i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-fractions-by-luis-alberto-mosquera/sssss15i"/>
      <lastmod>2026-11-02T16:41:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/borromean-rings-by-jose-manuel-arranz/sssss15o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/borromean-rings-by-jose-manuel-arranz/sssss15o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/borromean-rings-by-jose-manuel-arranz/sssss15o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/borromean-rings-by-jose-manuel-arranz/sssss15o"/>
      <lastmod>2026-11-02T16:48:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/borromean-rings-by-jose-manuel-arranz/sssss15o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/borromean-rings-by-jose-manuel-arranz/sssss15o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/borromean-rings-by-jose-manuel-arranz/sssss15o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/borromean-rings-by-jose-manuel-arranz/sssss15o"/>
      <lastmod>2026-11-02T16:48:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-of-complex-numbers-powers-of-i/sssss1bs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-of-complex-numbers-powers-of-i/sssss1bs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-of-complex-numbers-powers-of-i/sssss1bs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-of-complex-numbers-powers-of-i/sssss1bs"/>
      <lastmod>2026-11-02T16:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-of-complex-numbers-powers-of-i/sssss1bs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-of-complex-numbers-powers-of-i/sssss1bs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-of-complex-numbers-powers-of-i/sssss1bs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-of-complex-numbers-powers-of-i/sssss1bs"/>
      <lastmod>2026-11-02T16:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-and-perpendicular-lines/sssss1b7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-and-perpendicular-lines/sssss1b7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-and-perpendicular-lines/sssss1b7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-and-perpendicular-lines/sssss1b7"/>
      <lastmod>2026-11-01T23:13:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-and-perpendicular-lines/sssss1b7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-and-perpendicular-lines/sssss1b7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-and-perpendicular-lines/sssss1b7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-and-perpendicular-lines/sssss1b7"/>
      <lastmod>2026-11-01T23:13:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/element-h-geometric-construction-and-transformation/sssss1bn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/element-h-geometric-construction-and-transformation/sssss1bn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/element-h-geometric-construction-and-transformation/sssss1bn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/element-h-geometric-construction-and-transformation/sssss1bn"/>
      <lastmod>2026-11-02T02:11:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/element-h-geometric-construction-and-transformation/sssss1bn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/element-h-geometric-construction-and-transformation/sssss1bn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/element-h-geometric-construction-and-transformation/sssss1bn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/element-h-geometric-construction-and-transformation/sssss1bn"/>
      <lastmod>2026-11-02T02:11:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-triangle-congruence-exploration-by-julian-ornelas/sssss1b2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-triangle-congruence-exploration-by-julian-ornelas/sssss1b2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-triangle-congruence-exploration-by-julian-ornelas/sssss1b2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-triangle-congruence-exploration-by-julian-ornelas/sssss1b2"/>
      <lastmod>2026-11-02T18:46:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-triangle-congruence-exploration-by-julian-ornelas/sssss1b2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-triangle-congruence-exploration-by-julian-ornelas/sssss1b2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-triangle-congruence-exploration-by-julian-ornelas/sssss1b2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-triangle-congruence-exploration-by-julian-ornelas/sssss1b2"/>
      <lastmod>2026-11-02T18:46:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-cross-section/sssss1bk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-cross-section/sssss1bk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-cross-section/sssss1bk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-cross-section/sssss1bk"/>
      <lastmod>2026-11-01T19:34:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-cross-section/sssss1bk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-cross-section/sssss1bk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-cross-section/sssss1bk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-cross-section/sssss1bk"/>
      <lastmod>2026-11-01T19:34:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/from-equiangular-hexagon-to-ellipse/sssss1bz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-equiangular-hexagon-to-ellipse/sssss1bz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-equiangular-hexagon-to-ellipse/sssss1bz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-equiangular-hexagon-to-ellipse/sssss1bz"/>
      <lastmod>2026-11-02T16:37:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/from-equiangular-hexagon-to-ellipse/sssss1bz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-equiangular-hexagon-to-ellipse/sssss1bz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-equiangular-hexagon-to-ellipse/sssss1bz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-equiangular-hexagon-to-ellipse/sssss1bz"/>
      <lastmod>2026-11-02T16:37:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/step-by-step-parallel-line-constructions/sssss1b0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/step-by-step-parallel-line-constructions/sssss1b0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/step-by-step-parallel-line-constructions/sssss1b0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/step-by-step-parallel-line-constructions/sssss1b0"/>
      <lastmod>2026-11-01T23:14:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/step-by-step-parallel-line-constructions/sssss1b0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/step-by-step-parallel-line-constructions/sssss1b0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/step-by-step-parallel-line-constructions/sssss1b0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/step-by-step-parallel-line-constructions/sssss1b0"/>
      <lastmod>2026-11-01T23:14:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-two-planes-by-peterkite2/sssss1bd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-peterkite2/sssss1bd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-by-peterkite2/sssss1bd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-peterkite2/sssss1bd"/>
      <lastmod>2026-11-02T13:15:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-two-planes-by-peterkite2/sssss1bd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-peterkite2/sssss1bd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-by-peterkite2/sssss1bd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-peterkite2/sssss1bd"/>
      <lastmod>2026-11-02T13:15:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-behavior-demonstration/sssss1bf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-behavior-demonstration/sssss1bf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-behavior-demonstration/sssss1bf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-behavior-demonstration/sssss1bf"/>
      <lastmod>2026-11-01T19:18:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-behavior-demonstration/sssss1bf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-behavior-demonstration/sssss1bf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-behavior-demonstration/sssss1bf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-behavior-demonstration/sssss1bf"/>
      <lastmod>2026-11-01T19:18:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-248-composite-construction-of-triangle-incircle-circumcircle-rotati/sssss1b8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-248-composite-construction-of-triangle-incircle-circumcircle-rotati/sssss1b8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-248-composite-construction-of-triangle-incircle-circumcircle-rotati/sssss1b8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-248-composite-construction-of-triangle-incircle-circumcircle-rotati/sssss1b8"/>
      <lastmod>2026-11-02T17:08:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-248-composite-construction-of-triangle-incircle-circumcircle-rotati/sssss1b8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-248-composite-construction-of-triangle-incircle-circumcircle-rotati/sssss1b8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-248-composite-construction-of-triangle-incircle-circumcircle-rotati/sssss1b8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-248-composite-construction-of-triangle-incircle-circumcircle-rotati/sssss1b8"/>
      <lastmod>2026-11-02T17:08:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-sort-of-multiples-of-8/sssss1bu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-sort-of-multiples-of-8/sssss1bu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-sort-of-multiples-of-8/sssss1bu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-sort-of-multiples-of-8/sssss1bu"/>
      <lastmod>2026-11-01T20:53:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-sort-of-multiples-of-8/sssss1bu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-sort-of-multiples-of-8/sssss1bu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-sort-of-multiples-of-8/sssss1bu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-sort-of-multiples-of-8/sssss1bu"/>
      <lastmod>2026-11-01T20:53:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-tree-diagram-exercise-by-chris-cambr/sssss1b5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-tree-diagram-exercise-by-chris-cambr/sssss1b5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-tree-diagram-exercise-by-chris-cambr/sssss1b5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-tree-diagram-exercise-by-chris-cambr/sssss1b5"/>
      <lastmod>2026-11-02T18:14:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-tree-diagram-exercise-by-chris-cambr/sssss1b5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-tree-diagram-exercise-by-chris-cambr/sssss1b5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-tree-diagram-exercise-by-chris-cambr/sssss1b5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-tree-diagram-exercise-by-chris-cambr/sssss1b5"/>
      <lastmod>2026-11-02T18:14:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conditions-for-triangles-to-be-congruent/sssss1bb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conditions-for-triangles-to-be-congruent/sssss1bb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conditions-for-triangles-to-be-congruent/sssss1bb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conditions-for-triangles-to-be-congruent/sssss1bb"/>
      <lastmod>2026-11-02T18:13:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conditions-for-triangles-to-be-congruent/sssss1bb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conditions-for-triangles-to-be-congruent/sssss1bb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conditions-for-triangles-to-be-congruent/sssss1bb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conditions-for-triangles-to-be-congruent/sssss1bb"/>
      <lastmod>2026-11-02T18:13:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-math-team-energytech/sssss1b3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-math-team-energytech/sssss1b3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-sphere-by-math-team-energytech/sssss1b3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-math-team-energytech/sssss1b3"/>
      <lastmod>2026-11-02T00:27:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-sphere-by-math-team-energytech/sssss1b3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-math-team-energytech/sssss1b3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-sphere-by-math-team-energytech/sssss1b3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-math-team-energytech/sssss1b3"/>
      <lastmod>2026-11-02T00:27:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-folding-demonstration/sssss1bq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-folding-demonstration/sssss1bq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-folding-demonstration/sssss1bq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-folding-demonstration/sssss1bq"/>
      <lastmod>2026-11-02T16:44:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-folding-demonstration/sssss1bq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-folding-demonstration/sssss1bq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-folding-demonstration/sssss1bq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-folding-demonstration/sssss1bq"/>
      <lastmod>2026-11-02T16:44:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directional-derivative-by-paul-belliveau/sssss1b1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-by-paul-belliveau/sssss1b1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivative-by-paul-belliveau/sssss1b1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivative-by-paul-belliveau/sssss1b1"/>
      <lastmod>2026-11-02T17:37:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directional-derivative-by-paul-belliveau/sssss1b1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-by-paul-belliveau/sssss1b1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivative-by-paul-belliveau/sssss1b1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivative-by-paul-belliveau/sssss1b1"/>
      <lastmod>2026-11-02T17:37:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-of-parabola-from-distance-definition/sssss1bm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-parabola-from-distance-definition/sssss1bm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-parabola-from-distance-definition/sssss1bm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-parabola-from-distance-definition/sssss1bm"/>
      <lastmod>2026-11-02T17:42:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-of-parabola-from-distance-definition/sssss1bm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-parabola-from-distance-definition/sssss1bm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-parabola-from-distance-definition/sssss1bm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-parabola-from-distance-definition/sssss1bm"/>
      <lastmod>2026-11-02T17:42:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/confidence-intervals-for-proportions-by-cathleen-cerosaletti/sssss1bj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-intervals-for-proportions-by-cathleen-cerosaletti/sssss1bj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-intervals-for-proportions-by-cathleen-cerosaletti/sssss1bj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-intervals-for-proportions-by-cathleen-cerosaletti/sssss1bj"/>
      <lastmod>2026-11-02T16:57:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/confidence-intervals-for-proportions-by-cathleen-cerosaletti/sssss1bj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-intervals-for-proportions-by-cathleen-cerosaletti/sssss1bj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-intervals-for-proportions-by-cathleen-cerosaletti/sssss1bj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-intervals-for-proportions-by-cathleen-cerosaletti/sssss1bj"/>
      <lastmod>2026-11-02T16:57:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/more-dilations/sssss1bp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/more-dilations/sssss1bp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/more-dilations/sssss1bp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/more-dilations/sssss1bp"/>
      <lastmod>2026-11-02T10:38:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/more-dilations/sssss1bp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/more-dilations/sssss1bp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/more-dilations/sssss1bp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/more-dilations/sssss1bp"/>
      <lastmod>2026-11-02T10:38:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translate-the-square-root-function-if2-02-cyu4/sssss1bw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translate-the-square-root-function-if2-02-cyu4/sssss1bw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translate-the-square-root-function-if2-02-cyu4/sssss1bw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translate-the-square-root-function-if2-02-cyu4/sssss1bw"/>
      <lastmod>2026-11-02T02:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translate-the-square-root-function-if2-02-cyu4/sssss1bw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translate-the-square-root-function-if2-02-cyu4/sssss1bw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translate-the-square-root-function-if2-02-cyu4/sssss1bw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translate-the-square-root-function-if2-02-cyu4/sssss1bw"/>
      <lastmod>2026-11-02T02:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wonders-of-a-regular-nonagon/sssss1b6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wonders-of-a-regular-nonagon/sssss1b6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wonders-of-a-regular-nonagon/sssss1b6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wonders-of-a-regular-nonagon/sssss1b6"/>
      <lastmod>2026-11-01T23:25:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wonders-of-a-regular-nonagon/sssss1b6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wonders-of-a-regular-nonagon/sssss1b6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wonders-of-a-regular-nonagon/sssss1b6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wonders-of-a-regular-nonagon/sssss1b6"/>
      <lastmod>2026-11-01T23:25:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-law-demonstration/sssss1bg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-law-demonstration/sssss1bg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-law-demonstration/sssss1bg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-law-demonstration/sssss1bg"/>
      <lastmod>2026-11-01T20:49:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-law-demonstration/sssss1bg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-law-demonstration/sssss1bg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-law-demonstration/sssss1bg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-law-demonstration/sssss1bg"/>
      <lastmod>2026-11-01T20:49:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/folding-nets-of-a-pyramid/sssss1b9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folding-nets-of-a-pyramid/sssss1b9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folding-nets-of-a-pyramid/sssss1b9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folding-nets-of-a-pyramid/sssss1b9"/>
      <lastmod>2026-11-02T17:56:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/folding-nets-of-a-pyramid/sssss1b9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folding-nets-of-a-pyramid/sssss1b9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folding-nets-of-a-pyramid/sssss1b9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folding-nets-of-a-pyramid/sssss1b9"/>
      <lastmod>2026-11-02T17:56:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/box-plots-practice-statistical-visualization-via-geometric-construction/sssss1be</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-plots-practice-statistical-visualization-via-geometric-construction/sssss1be"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-plots-practice-statistical-visualization-via-geometric-construction/sssss1be"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-plots-practice-statistical-visualization-via-geometric-construction/sssss1be"/>
      <lastmod>2026-11-01T20:11:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/box-plots-practice-statistical-visualization-via-geometric-construction/sssss1be</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-plots-practice-statistical-visualization-via-geometric-construction/sssss1be"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-plots-practice-statistical-visualization-via-geometric-construction/sssss1be"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-plots-practice-statistical-visualization-via-geometric-construction/sssss1be"/>
      <lastmod>2026-11-01T20:11:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lines-starred-demo/sssss1bv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-starred-demo/sssss1bv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-starred-demo/sssss1bv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-starred-demo/sssss1bv"/>
      <lastmod>2026-11-02T02:57:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lines-starred-demo/sssss1bv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-starred-demo/sssss1bv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-starred-demo/sssss1bv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-starred-demo/sssss1bv"/>
      <lastmod>2026-11-02T02:57:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-explorer/sssss1b4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-explorer/sssss1b4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-explorer/sssss1b4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-explorer/sssss1b4"/>
      <lastmod>2026-11-02T17:45:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-explorer/sssss1b4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-explorer/sssss1b4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-explorer/sssss1b4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-explorer/sssss1b4"/>
      <lastmod>2026-11-02T17:45:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-pyramid-construction-by-j-benjamin/sssss1bl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-pyramid-construction-by-j-benjamin/sssss1bl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-pyramid-construction-by-j-benjamin/sssss1bl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-pyramid-construction-by-j-benjamin/sssss1bl"/>
      <lastmod>2026-11-02T18:58:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-pyramid-construction-by-j-benjamin/sssss1bl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-pyramid-construction-by-j-benjamin/sssss1bl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-pyramid-construction-by-j-benjamin/sssss1bl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-pyramid-construction-by-j-benjamin/sssss1bl"/>
      <lastmod>2026-11-02T18:58:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumsphere-of-a-tetrahedron/sssss1by</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumsphere-of-a-tetrahedron/sssss1by"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumsphere-of-a-tetrahedron/sssss1by"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumsphere-of-a-tetrahedron/sssss1by"/>
      <lastmod>2026-11-01T19:29:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumsphere-of-a-tetrahedron/sssss1by</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumsphere-of-a-tetrahedron/sssss1by"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumsphere-of-a-tetrahedron/sssss1by"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumsphere-of-a-tetrahedron/sssss1by"/>
      <lastmod>2026-11-01T19:29:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-cosine/sssss1ba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine/sssss1ba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-cosine/sssss1ba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine/sssss1ba"/>
      <lastmod>2026-11-02T18:46:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-cosine/sssss1ba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine/sssss1ba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-cosine/sssss1ba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine/sssss1ba"/>
      <lastmod>2026-11-02T18:46:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-final-version/sssss1bc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-final-version/sssss1bc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-final-version/sssss1bc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-final-version/sssss1bc"/>
      <lastmod>2026-11-02T15:19:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-final-version/sssss1bc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-final-version/sssss1bc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-final-version/sssss1bc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-final-version/sssss1bc"/>
      <lastmod>2026-11-02T15:19:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-unwrapping/sssss1br</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-unwrapping/sssss1br"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-unwrapping/sssss1br"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-unwrapping/sssss1br"/>
      <lastmod>2026-11-01T23:36:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-unwrapping/sssss1br</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-unwrapping/sssss1br"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-unwrapping/sssss1br"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-unwrapping/sssss1br"/>
      <lastmod>2026-11-01T23:36:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-6-1-lesson-relationships-between-quantities/sssss1bh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-6-1-lesson-relationships-between-quantities/sssss1bh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-6-1-lesson-relationships-between-quantities/sssss1bh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-6-1-lesson-relationships-between-quantities/sssss1bh"/>
      <lastmod>2026-11-01T20:18:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-6-1-lesson-relationships-between-quantities/sssss1bh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-6-1-lesson-relationships-between-quantities/sssss1bh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-6-1-lesson-relationships-between-quantities/sssss1bh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-6-1-lesson-relationships-between-quantities/sssss1bh"/>
      <lastmod>2026-11-01T20:18:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-curve-of-binomial-distribution/sssss1bt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-curve-of-binomial-distribution/sssss1bt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-curve-of-binomial-distribution/sssss1bt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-curve-of-binomial-distribution/sssss1bt"/>
      <lastmod>2026-11-01T19:35:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-curve-of-binomial-distribution/sssss1bt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-curve-of-binomial-distribution/sssss1bt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-curve-of-binomial-distribution/sssss1bt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-curve-of-binomial-distribution/sssss1bt"/>
      <lastmod>2026-11-01T19:35:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-vs-time-cube-root/sssss1bx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-vs-time-cube-root/sssss1bx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-vs-time-cube-root/sssss1bx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-vs-time-cube-root/sssss1bx"/>
      <lastmod>2026-11-02T13:09:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-vs-time-cube-root/sssss1bx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-vs-time-cube-root/sssss1bx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-vs-time-cube-root/sssss1bx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-vs-time-cube-root/sssss1bx"/>
      <lastmod>2026-11-02T13:09:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-cones-demo/sssss1bi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-cones-demo/sssss1bi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-cones-demo/sssss1bi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-cones-demo/sssss1bi"/>
      <lastmod>2026-11-02T03:15:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-cones-demo/sssss1bi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-cones-demo/sssss1bi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-cones-demo/sssss1bi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-cones-demo/sssss1bi"/>
      <lastmod>2026-11-02T03:15:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-y-bsinax-with-y-sinx/sssss1bo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-y-bsinax-with-y-sinx/sssss1bo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-y-bsinax-with-y-sinx/sssss1bo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-y-bsinax-with-y-sinx/sssss1bo"/>
      <lastmod>2026-11-02T16:49:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-y-bsinax-with-y-sinx/sssss1bo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-y-bsinax-with-y-sinx/sssss1bo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-y-bsinax-with-y-sinx/sssss1bo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-y-bsinax-with-y-sinx/sssss1bo"/>
      <lastmod>2026-11-02T16:49:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-electric-forces/sssss13s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-electric-forces/sssss13s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-electric-forces/sssss13s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-electric-forces/sssss13s"/>
      <lastmod>2026-11-02T18:40:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-electric-forces/sssss13s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-electric-forces/sssss13s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-electric-forces/sssss13s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-electric-forces/sssss13s"/>
      <lastmod>2026-11-02T18:40:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualization-of-multiplication-of-natural-numbers/sssss137</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualization-of-multiplication-of-natural-numbers/sssss137"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualization-of-multiplication-of-natural-numbers/sssss137"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualization-of-multiplication-of-natural-numbers/sssss137"/>
      <lastmod>2026-11-02T15:30:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualization-of-multiplication-of-natural-numbers/sssss137</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualization-of-multiplication-of-natural-numbers/sssss137"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualization-of-multiplication-of-natural-numbers/sssss137"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualization-of-multiplication-of-natural-numbers/sssss137"/>
      <lastmod>2026-11-02T15:30:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-cone-by-n-roach/sssss13n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cone-by-n-roach/sssss13n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cone-by-n-roach/sssss13n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cone-by-n-roach/sssss13n"/>
      <lastmod>2026-11-02T17:15:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-cone-by-n-roach/sssss13n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cone-by-n-roach/sssss13n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cone-by-n-roach/sssss13n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cone-by-n-roach/sssss13n"/>
      <lastmod>2026-11-02T17:15:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/can-you-find-the-volume/sssss132</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/can-you-find-the-volume/sssss132"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/can-you-find-the-volume/sssss132"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/can-you-find-the-volume/sssss132"/>
      <lastmod>2026-11-02T13:27:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/can-you-find-the-volume/sssss132</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/can-you-find-the-volume/sssss132"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/can-you-find-the-volume/sssss132"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/can-you-find-the-volume/sssss132"/>
      <lastmod>2026-11-02T13:27:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-square/sssss13k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-square/sssss13k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-square/sssss13k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-square/sssss13k"/>
      <lastmod>2026-11-02T10:58:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-square/sssss13k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-square/sssss13k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-square/sssss13k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-square/sssss13k"/>
      <lastmod>2026-11-02T10:58:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inconsistent-linear-system-demonstration/sssss13z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inconsistent-linear-system-demonstration/sssss13z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inconsistent-linear-system-demonstration/sssss13z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inconsistent-linear-system-demonstration/sssss13z"/>
      <lastmod>2026-11-01T21:25:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inconsistent-linear-system-demonstration/sssss13z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inconsistent-linear-system-demonstration/sssss13z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inconsistent-linear-system-demonstration/sssss13z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inconsistent-linear-system-demonstration/sssss13z"/>
      <lastmod>2026-11-01T21:25:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/second-derivative-test-by-daniel-vallieres/sssss130</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/second-derivative-test-by-daniel-vallieres/sssss130"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/second-derivative-test-by-daniel-vallieres/sssss130"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/second-derivative-test-by-daniel-vallieres/sssss130"/>
      <lastmod>2026-11-01T21:25:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/second-derivative-test-by-daniel-vallieres/sssss130</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/second-derivative-test-by-daniel-vallieres/sssss130"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/second-derivative-test-by-daniel-vallieres/sssss130"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/second-derivative-test-by-daniel-vallieres/sssss130"/>
      <lastmod>2026-11-01T21:25:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/aa-similarity-postulate-proof-with-transformations/sssss13d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aa-similarity-postulate-proof-with-transformations/sssss13d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aa-similarity-postulate-proof-with-transformations/sssss13d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aa-similarity-postulate-proof-with-transformations/sssss13d"/>
      <lastmod>2026-11-02T17:46:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/aa-similarity-postulate-proof-with-transformations/sssss13d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aa-similarity-postulate-proof-with-transformations/sssss13d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aa-similarity-postulate-proof-with-transformations/sssss13d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aa-similarity-postulate-proof-with-transformations/sssss13d"/>
      <lastmod>2026-11-02T17:46:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chords-in-a-circle/sssss13f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chords-in-a-circle/sssss13f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chords-in-a-circle/sssss13f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chords-in-a-circle/sssss13f"/>
      <lastmod>2026-11-01T23:40:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chords-in-a-circle/sssss13f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chords-in-a-circle/sssss13f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chords-in-a-circle/sssss13f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chords-in-a-circle/sssss13f"/>
      <lastmod>2026-11-01T23:40:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conditional-extrema/sssss138</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conditional-extrema/sssss138"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conditional-extrema/sssss138"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conditional-extrema/sssss138"/>
      <lastmod>2026-11-02T16:49:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conditional-extrema/sssss138</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conditional-extrema/sssss138"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conditional-extrema/sssss138"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conditional-extrema/sssss138"/>
      <lastmod>2026-11-02T16:49:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-reflections-demonstration/sssss13u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-reflections-demonstration/sssss13u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-reflections-demonstration/sssss13u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-reflections-demonstration/sssss13u"/>
      <lastmod>2026-11-02T17:06:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-reflections-demonstration/sssss13u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-reflections-demonstration/sssss13u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-reflections-demonstration/sssss13u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-reflections-demonstration/sssss13u"/>
      <lastmod>2026-11-02T17:06:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-by-jeff-eichas/sssss135</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-jeff-eichas/sssss135"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-jeff-eichas/sssss135"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-jeff-eichas/sssss135"/>
      <lastmod>2026-11-01T23:32:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-by-jeff-eichas/sssss135</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-jeff-eichas/sssss135"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-jeff-eichas/sssss135"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-jeff-eichas/sssss135"/>
      <lastmod>2026-11-01T23:32:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/from-cube-to-dodecahedron-euclidean-construction/sssss13b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-cube-to-dodecahedron-euclidean-construction/sssss13b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-cube-to-dodecahedron-euclidean-construction/sssss13b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-cube-to-dodecahedron-euclidean-construction/sssss13b"/>
      <lastmod>2026-11-02T17:56:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/from-cube-to-dodecahedron-euclidean-construction/sssss13b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-cube-to-dodecahedron-euclidean-construction/sssss13b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-cube-to-dodecahedron-euclidean-construction/sssss13b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-cube-to-dodecahedron-euclidean-construction/sssss13b"/>
      <lastmod>2026-11-02T17:56:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/workbench-for-area-of-parallelograms-and-triangles/sssss133</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/workbench-for-area-of-parallelograms-and-triangles/sssss133"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/workbench-for-area-of-parallelograms-and-triangles/sssss133"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/workbench-for-area-of-parallelograms-and-triangles/sssss133"/>
      <lastmod>2026-11-01T21:42:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/workbench-for-area-of-parallelograms-and-triangles/sssss133</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/workbench-for-area-of-parallelograms-and-triangles/sssss133"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/workbench-for-area-of-parallelograms-and-triangles/sssss133"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/workbench-for-area-of-parallelograms-and-triangles/sssss133"/>
      <lastmod>2026-11-01T21:42:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-ravi-2/sssss13q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-ravi-2/sssss13q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-a-system-of-linear-equations-by-ravi-2/sssss13q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-ravi-2/sssss13q"/>
      <lastmod>2026-11-02T16:33:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-a-system-of-linear-equations-by-ravi-2/sssss13q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-ravi-2/sssss13q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-a-system-of-linear-equations-by-ravi-2/sssss13q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-ravi-2/sssss13q"/>
      <lastmod>2026-11-02T16:33:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimating-fractions-on-a-number-line-with-error-visualization/sssss131</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-fractions-on-a-number-line-with-error-visualization/sssss131"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-fractions-on-a-number-line-with-error-visualization/sssss131"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-fractions-on-a-number-line-with-error-visualization/sssss131"/>
      <lastmod>2026-11-02T02:43:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimating-fractions-on-a-number-line-with-error-visualization/sssss131</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-fractions-on-a-number-line-with-error-visualization/sssss131"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-fractions-on-a-number-line-with-error-visualization/sssss131"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-fractions-on-a-number-line-with-error-visualization/sssss131"/>
      <lastmod>2026-11-02T02:43:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triple-integral-in-spherical-coordinates-visualizer/sssss13m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triple-integral-in-spherical-coordinates-visualizer/sssss13m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triple-integral-in-spherical-coordinates-visualizer/sssss13m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triple-integral-in-spherical-coordinates-visualizer/sssss13m"/>
      <lastmod>2026-11-01T19:06:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triple-integral-in-spherical-coordinates-visualizer/sssss13m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triple-integral-in-spherical-coordinates-visualizer/sssss13m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triple-integral-in-spherical-coordinates-visualizer/sssss13m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triple-integral-in-spherical-coordinates-visualizer/sssss13m"/>
      <lastmod>2026-11-01T19:06:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-function-and-geometric-transformation-demo/sssss13j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-function-and-geometric-transformation-demo/sssss13j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-function-and-geometric-transformation-demo/sssss13j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-function-and-geometric-transformation-demo/sssss13j"/>
      <lastmod>2026-11-01T21:19:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-function-and-geometric-transformation-demo/sssss13j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-function-and-geometric-transformation-demo/sssss13j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-function-and-geometric-transformation-demo/sssss13j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-function-and-geometric-transformation-demo/sssss13j"/>
      <lastmod>2026-11-01T21:19:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equation-equal-constant-practice/sssss13p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-equal-constant-practice/sssss13p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-equal-constant-practice/sssss13p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-equal-constant-practice/sssss13p"/>
      <lastmod>2026-11-01T23:51:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equation-equal-constant-practice/sssss13p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-equal-constant-practice/sssss13p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-equal-constant-practice/sssss13p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-equal-constant-practice/sssss13p"/>
      <lastmod>2026-11-01T23:51:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angles-investigation/sssss13w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-investigation/sssss13w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-investigation/sssss13w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-investigation/sssss13w"/>
      <lastmod>2026-11-02T09:46:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angles-investigation/sssss13w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-investigation/sssss13w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-investigation/sssss13w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-investigation/sssss13w"/>
      <lastmod>2026-11-02T09:46:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-colors-sphere-covered-with-colored-tracing-curves/sssss136</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-colors-sphere-covered-with-colored-tracing-curves/sssss136"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-colors-sphere-covered-with-colored-tracing-curves/sssss136"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-colors-sphere-covered-with-colored-tracing-curves/sssss136"/>
      <lastmod>2026-11-01T23:22:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-colors-sphere-covered-with-colored-tracing-curves/sssss136</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-colors-sphere-covered-with-colored-tracing-curves/sssss136"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-colors-sphere-covered-with-colored-tracing-curves/sssss136"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-colors-sphere-covered-with-colored-tracing-curves/sssss136"/>
      <lastmod>2026-11-01T23:22:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shading-venn-diagrams/sssss13g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shading-venn-diagrams/sssss13g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shading-venn-diagrams/sssss13g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shading-venn-diagrams/sssss13g"/>
      <lastmod>2026-11-02T16:36:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shading-venn-diagrams/sssss13g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shading-venn-diagrams/sssss13g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shading-venn-diagrams/sssss13g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shading-venn-diagrams/sssss13g"/>
      <lastmod>2026-11-02T16:36:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/holiday-fun-2-cylinder-rectangle-dynamic-construction/sssss139</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/holiday-fun-2-cylinder-rectangle-dynamic-construction/sssss139"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/holiday-fun-2-cylinder-rectangle-dynamic-construction/sssss139"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/holiday-fun-2-cylinder-rectangle-dynamic-construction/sssss139"/>
      <lastmod>2026-11-02T11:52:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/holiday-fun-2-cylinder-rectangle-dynamic-construction/sssss139</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/holiday-fun-2-cylinder-rectangle-dynamic-construction/sssss139"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/holiday-fun-2-cylinder-rectangle-dynamic-construction/sssss139"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/holiday-fun-2-cylinder-rectangle-dynamic-construction/sssss139"/>
      <lastmod>2026-11-02T11:52:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-roots/sssss13e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-roots/sssss13e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-roots/sssss13e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-roots/sssss13e"/>
      <lastmod>2026-11-02T18:55:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-roots/sssss13e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-roots/sssss13e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-roots/sssss13e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-roots/sssss13e"/>
      <lastmod>2026-11-02T18:55:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/creating-regular-polygons-exercise-1/sssss13v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-regular-polygons-exercise-1/sssss13v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-regular-polygons-exercise-1/sssss13v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-regular-polygons-exercise-1/sssss13v"/>
      <lastmod>2026-11-02T16:39:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/creating-regular-polygons-exercise-1/sssss13v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-regular-polygons-exercise-1/sssss13v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-regular-polygons-exercise-1/sssss13v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-regular-polygons-exercise-1/sssss13v"/>
      <lastmod>2026-11-02T16:39:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-hkj-rotated-75-cw-about-point-r-on-hj/sssss134</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-hkj-rotated-75-cw-about-point-r-on-hj/sssss134"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-hkj-rotated-75-cw-about-point-r-on-hj/sssss134"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-hkj-rotated-75-cw-about-point-r-on-hj/sssss134"/>
      <lastmod>2026-11-02T18:45:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-hkj-rotated-75-cw-about-point-r-on-hj/sssss134</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-hkj-rotated-75-cw-about-point-r-on-hj/sssss134"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-hkj-rotated-75-cw-about-point-r-on-hj/sssss134"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-hkj-rotated-75-cw-about-point-r-on-hj/sssss134"/>
      <lastmod>2026-11-02T18:45:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-construction-8-construct-a-square/sssss13l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-construction-8-construct-a-square/sssss13l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-construction-8-construct-a-square/sssss13l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-construction-8-construct-a-square/sssss13l"/>
      <lastmod>2026-11-02T12:46:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-construction-8-construct-a-square/sssss13l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-construction-8-construct-a-square/sssss13l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-construction-8-construct-a-square/sssss13l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-construction-8-construct-a-square/sssss13l"/>
      <lastmod>2026-11-02T12:46:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-vs-exponential-growth/sssss13y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-vs-exponential-growth/sssss13y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-vs-exponential-growth/sssss13y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-vs-exponential-growth/sssss13y"/>
      <lastmod>2026-11-01T19:37:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-vs-exponential-growth/sssss13y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-vs-exponential-growth/sssss13y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-vs-exponential-growth/sssss13y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-vs-exponential-growth/sssss13y"/>
      <lastmod>2026-11-01T19:37:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/color-subtraction-demonstration/sssss13a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/color-subtraction-demonstration/sssss13a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/color-subtraction-demonstration/sssss13a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/color-subtraction-demonstration/sssss13a"/>
      <lastmod>2026-11-01T19:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/color-subtraction-demonstration/sssss13a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/color-subtraction-demonstration/sssss13a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/color-subtraction-demonstration/sssss13a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/color-subtraction-demonstration/sssss13a"/>
      <lastmod>2026-11-01T19:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sliding-trigon-dynamic-triangle-transformations-and-intersection-exploration/sssss13c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliding-trigon-dynamic-triangle-transformations-and-intersection-exploration/sssss13c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliding-trigon-dynamic-triangle-transformations-and-intersection-exploration/sssss13c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliding-trigon-dynamic-triangle-transformations-and-intersection-exploration/sssss13c"/>
      <lastmod>2026-11-02T18:15:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sliding-trigon-dynamic-triangle-transformations-and-intersection-exploration/sssss13c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliding-trigon-dynamic-triangle-transformations-and-intersection-exploration/sssss13c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliding-trigon-dynamic-triangle-transformations-and-intersection-exploration/sssss13c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliding-trigon-dynamic-triangle-transformations-and-intersection-exploration/sssss13c"/>
      <lastmod>2026-11-02T18:15:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-construction-by-ca-redfearn/sssss13r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-construction-by-ca-redfearn/sssss13r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-construction-by-ca-redfearn/sssss13r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-construction-by-ca-redfearn/sssss13r"/>
      <lastmod>2026-11-02T13:15:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-construction-by-ca-redfearn/sssss13r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-construction-by-ca-redfearn/sssss13r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-construction-by-ca-redfearn/sssss13r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-construction-by-ca-redfearn/sssss13r"/>
      <lastmod>2026-11-02T13:15:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-template-by-dan-dale/sssss13h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-template-by-dan-dale/sssss13h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-template-by-dan-dale/sssss13h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-template-by-dan-dale/sssss13h"/>
      <lastmod>2026-11-01T23:20:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-template-by-dan-dale/sssss13h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-template-by-dan-dale/sssss13h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-template-by-dan-dale/sssss13h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-template-by-dan-dale/sssss13h"/>
      <lastmod>2026-11-01T23:20:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-and-graph/sssss13t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-and-graph/sssss13t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-and-graph/sssss13t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-and-graph/sssss13t"/>
      <lastmod>2026-11-01T21:22:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-and-graph/sssss13t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-and-graph/sssss13t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-and-graph/sssss13t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-and-graph/sssss13t"/>
      <lastmod>2026-11-01T21:22:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/filling-an-upside-down-pyramid-with-water/sssss13x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/filling-an-upside-down-pyramid-with-water/sssss13x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/filling-an-upside-down-pyramid-with-water/sssss13x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/filling-an-upside-down-pyramid-with-water/sssss13x"/>
      <lastmod>2026-11-02T17:05:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/filling-an-upside-down-pyramid-with-water/sssss13x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/filling-an-upside-down-pyramid-with-water/sssss13x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/filling-an-upside-down-pyramid-with-water/sssss13x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/filling-an-upside-down-pyramid-with-water/sssss13x"/>
      <lastmod>2026-11-02T17:05:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-by-abigail-norton/sssss13i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-abigail-norton/sssss13i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-abigail-norton/sssss13i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-abigail-norton/sssss13i"/>
      <lastmod>2026-11-02T17:53:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-by-abigail-norton/sssss13i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-abigail-norton/sssss13i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-abigail-norton/sssss13i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-abigail-norton/sssss13i"/>
      <lastmod>2026-11-02T17:53:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mental-arithmetic-target-practice-1/sssss13o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mental-arithmetic-target-practice-1/sssss13o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mental-arithmetic-target-practice-1/sssss13o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mental-arithmetic-target-practice-1/sssss13o"/>
      <lastmod>2026-11-02T18:13:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mental-arithmetic-target-practice-1/sssss13o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mental-arithmetic-target-practice-1/sssss13o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mental-arithmetic-target-practice-1/sssss13o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mental-arithmetic-target-practice-1/sssss13o"/>
      <lastmod>2026-11-02T18:13:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-parameters-solution/sssss1qs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-parameters-solution/sssss1qs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-parameters-solution/sssss1qs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-parameters-solution/sssss1qs"/>
      <lastmod>2026-11-02T18:33:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-parameters-solution/sssss1qs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-parameters-solution/sssss1qs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-parameters-solution/sssss1qs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-parameters-solution/sssss1qs"/>
      <lastmod>2026-11-02T18:33:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inverses-of-functions/sssss1q7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverses-of-functions/sssss1q7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverses-of-functions/sssss1q7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverses-of-functions/sssss1q7"/>
      <lastmod>2026-11-01T21:43:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inverses-of-functions/sssss1q7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverses-of-functions/sssss1q7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverses-of-functions/sssss1q7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverses-of-functions/sssss1q7"/>
      <lastmod>2026-11-01T21:43:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-exterior-angles-theorem-v2-transformational-proof/sssss1qn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-theorem-v2-transformational-proof/sssss1qn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-exterior-angles-theorem-v2-transformational-proof/sssss1qn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-theorem-v2-transformational-proof/sssss1qn"/>
      <lastmod>2026-11-02T00:56:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-exterior-angles-theorem-v2-transformational-proof/sssss1qn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-theorem-v2-transformational-proof/sssss1qn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-exterior-angles-theorem-v2-transformational-proof/sssss1qn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-theorem-v2-transformational-proof/sssss1qn"/>
      <lastmod>2026-11-02T00:56:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions-practice/sssss1q2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-practice/sssss1q2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-practice/sssss1q2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-practice/sssss1q2"/>
      <lastmod>2026-11-01T20:18:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions-practice/sssss1q2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-practice/sssss1q2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-practice/sssss1q2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-practice/sssss1q2"/>
      <lastmod>2026-11-01T20:18:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-vectors-and-similarity-transformation-demo/sssss1qk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-similarity-transformation-demo/sssss1qk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-similarity-transformation-demo/sssss1qk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-similarity-transformation-demo/sssss1qk"/>
      <lastmod>2026-11-01T23:14:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-vectors-and-similarity-transformation-demo/sssss1qk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-similarity-transformation-demo/sssss1qk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-similarity-transformation-demo/sssss1qk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-similarity-transformation-demo/sssss1qk"/>
      <lastmod>2026-11-01T23:14:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cherry-blossoms-logarithmic-regression/sssss1qz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cherry-blossoms-logarithmic-regression/sssss1qz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cherry-blossoms-logarithmic-regression/sssss1qz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cherry-blossoms-logarithmic-regression/sssss1qz"/>
      <lastmod>2026-11-02T14:52:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cherry-blossoms-logarithmic-regression/sssss1qz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cherry-blossoms-logarithmic-regression/sssss1qz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cherry-blossoms-logarithmic-regression/sssss1qz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cherry-blossoms-logarithmic-regression/sssss1qz"/>
      <lastmod>2026-11-02T14:52:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/continuous-uniform-distribution-probability-calculation/sssss1q0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuous-uniform-distribution-probability-calculation/sssss1q0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuous-uniform-distribution-probability-calculation/sssss1q0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuous-uniform-distribution-probability-calculation/sssss1q0"/>
      <lastmod>2026-11-02T18:04:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/continuous-uniform-distribution-probability-calculation/sssss1q0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuous-uniform-distribution-probability-calculation/sssss1q0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuous-uniform-distribution-probability-calculation/sssss1q0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuous-uniform-distribution-probability-calculation/sssss1q0"/>
      <lastmod>2026-11-02T18:04:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-butterfly-effect-for-adding-fractions/sssss1qd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-butterfly-effect-for-adding-fractions/sssss1qd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-butterfly-effect-for-adding-fractions/sssss1qd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-butterfly-effect-for-adding-fractions/sssss1qd"/>
      <lastmod>2026-11-01T20:54:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-butterfly-effect-for-adding-fractions/sssss1qd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-butterfly-effect-for-adding-fractions/sssss1qd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-butterfly-effect-for-adding-fractions/sssss1qd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-butterfly-effect-for-adding-fractions/sssss1qd"/>
      <lastmod>2026-11-01T20:54:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arc-length-calculation-example/sssss1qf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-calculation-example/sssss1qf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-calculation-example/sssss1qf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-calculation-example/sssss1qf"/>
      <lastmod>2026-11-01T19:17:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arc-length-calculation-example/sssss1qf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-calculation-example/sssss1qf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-calculation-example/sssss1qf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-calculation-example/sssss1qf"/>
      <lastmod>2026-11-01T19:17:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-scanning/sssss1q8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-scanning/sssss1q8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-scanning/sssss1q8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-scanning/sssss1q8"/>
      <lastmod>2026-11-01T21:57:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-scanning/sssss1q8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-scanning/sssss1q8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-scanning/sssss1q8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-scanning/sssss1q8"/>
      <lastmod>2026-11-01T21:57:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/monte-carlo-pi-confidence-interval/sssss1qu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/monte-carlo-pi-confidence-interval/sssss1qu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/monte-carlo-pi-confidence-interval/sssss1qu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/monte-carlo-pi-confidence-interval/sssss1qu"/>
      <lastmod>2026-11-01T19:09:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/monte-carlo-pi-confidence-interval/sssss1qu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/monte-carlo-pi-confidence-interval/sssss1qu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/monte-carlo-pi-confidence-interval/sssss1qu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/monte-carlo-pi-confidence-interval/sssss1qu"/>
      <lastmod>2026-11-01T19:09:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-two-normal-distributions/sssss1q5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-two-normal-distributions/sssss1q5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-two-normal-distributions/sssss1q5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-two-normal-distributions/sssss1q5"/>
      <lastmod>2026-11-02T02:21:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-two-normal-distributions/sssss1q5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-two-normal-distributions/sssss1q5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-two-normal-distributions/sssss1q5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-two-normal-distributions/sssss1q5"/>
      <lastmod>2026-11-02T02:21:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-across-the-line-y-x/sssss1qb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-across-the-line-y-x/sssss1qb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-across-the-line-y-x/sssss1qb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-across-the-line-y-x/sssss1qb"/>
      <lastmod>2026-11-02T17:16:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-across-the-line-y-x/sssss1qb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-across-the-line-y-x/sssss1qb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-across-the-line-y-x/sssss1qb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-across-the-line-y-x/sssss1qb"/>
      <lastmod>2026-11-02T17:16:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/candy-bar-measurement-by-arthur-lee-2/sssss1q3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/candy-bar-measurement-by-arthur-lee-2/sssss1q3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/candy-bar-measurement-by-arthur-lee-2/sssss1q3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/candy-bar-measurement-by-arthur-lee-2/sssss1q3"/>
      <lastmod>2026-11-02T02:45:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/candy-bar-measurement-by-arthur-lee-2/sssss1q3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/candy-bar-measurement-by-arthur-lee-2/sssss1q3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/candy-bar-measurement-by-arthur-lee-2/sssss1q3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/candy-bar-measurement-by-arthur-lee-2/sssss1q3"/>
      <lastmod>2026-11-02T02:45:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/incenter-incircle-dynamic-exploration/sssss1qq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incenter-incircle-dynamic-exploration/sssss1qq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incenter-incircle-dynamic-exploration/sssss1qq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incenter-incircle-dynamic-exploration/sssss1qq"/>
      <lastmod>2026-11-02T12:34:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/incenter-incircle-dynamic-exploration/sssss1qq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incenter-incircle-dynamic-exploration/sssss1qq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incenter-incircle-dynamic-exploration/sssss1qq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incenter-incircle-dynamic-exploration/sssss1qq"/>
      <lastmod>2026-11-02T12:34:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimate-sample-size-for-t-distribution-confidence-interval/sssss1q1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimate-sample-size-for-t-distribution-confidence-interval/sssss1q1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimate-sample-size-for-t-distribution-confidence-interval/sssss1q1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimate-sample-size-for-t-distribution-confidence-interval/sssss1q1"/>
      <lastmod>2026-11-01T21:18:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimate-sample-size-for-t-distribution-confidence-interval/sssss1q1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimate-sample-size-for-t-distribution-confidence-interval/sssss1q1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimate-sample-size-for-t-distribution-confidence-interval/sssss1q1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimate-sample-size-for-t-distribution-confidence-interval/sssss1q1"/>
      <lastmod>2026-11-01T21:18:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/odd-negative-exponent-inverse-power-function/sssss1qm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/odd-negative-exponent-inverse-power-function/sssss1qm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/odd-negative-exponent-inverse-power-function/sssss1qm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/odd-negative-exponent-inverse-power-function/sssss1qm"/>
      <lastmod>2026-11-02T12:49:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/odd-negative-exponent-inverse-power-function/sssss1qm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/odd-negative-exponent-inverse-power-function/sssss1qm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/odd-negative-exponent-inverse-power-function/sssss1qm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/odd-negative-exponent-inverse-power-function/sssss1qm"/>
      <lastmod>2026-11-02T12:49:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-and-trapezoid-midsegment-investigations/sssss1qj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-trapezoid-midsegment-investigations/sssss1qj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-trapezoid-midsegment-investigations/sssss1qj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-trapezoid-midsegment-investigations/sssss1qj"/>
      <lastmod>2026-11-02T02:52:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-and-trapezoid-midsegment-investigations/sssss1qj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-trapezoid-midsegment-investigations/sssss1qj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-trapezoid-midsegment-investigations/sssss1qj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-trapezoid-midsegment-investigations/sssss1qj"/>
      <lastmod>2026-11-02T02:52:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-parametric-equations-and-parabola/sssss1qp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-parametric-equations-and-parabola/sssss1qp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-parametric-equations-and-parabola/sssss1qp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-parametric-equations-and-parabola/sssss1qp"/>
      <lastmod>2026-11-02T16:36:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-parametric-equations-and-parabola/sssss1qp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-parametric-equations-and-parabola/sssss1qp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-parametric-equations-and-parabola/sssss1qp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-parametric-equations-and-parabola/sssss1qp"/>
      <lastmod>2026-11-02T16:36:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-angle-in-a-semicircle-using-vectors/sssss1qw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-angle-in-a-semicircle-using-vectors/sssss1qw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-angle-in-a-semicircle-using-vectors/sssss1qw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-angle-in-a-semicircle-using-vectors/sssss1qw"/>
      <lastmod>2026-11-02T18:24:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-angle-in-a-semicircle-using-vectors/sssss1qw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-angle-in-a-semicircle-using-vectors/sssss1qw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-angle-in-a-semicircle-using-vectors/sssss1qw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-angle-in-a-semicircle-using-vectors/sssss1qw"/>
      <lastmod>2026-11-02T18:24:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cars-meeting-story-graph/sssss1q6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cars-meeting-story-graph/sssss1q6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cars-meeting-story-graph/sssss1q6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cars-meeting-story-graph/sssss1q6"/>
      <lastmod>2026-11-02T17:36:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cars-meeting-story-graph/sssss1q6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cars-meeting-story-graph/sssss1q6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cars-meeting-story-graph/sssss1q6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cars-meeting-story-graph/sssss1q6"/>
      <lastmod>2026-11-02T17:36:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-4-3-practice-interpreting-division-situations/sssss1qg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-4-3-practice-interpreting-division-situations/sssss1qg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-4-3-practice-interpreting-division-situations/sssss1qg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-4-3-practice-interpreting-division-situations/sssss1qg"/>
      <lastmod>2026-11-01T20:35:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-4-3-practice-interpreting-division-situations/sssss1qg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-4-3-practice-interpreting-division-situations/sssss1qg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-4-3-practice-interpreting-division-situations/sssss1qg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-4-3-practice-interpreting-division-situations/sssss1qg"/>
      <lastmod>2026-11-01T20:35:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-geogebra-3d-grapher-interface/sssss1q9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-geogebra-3d-grapher-interface/sssss1q9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-geogebra-3d-grapher-interface/sssss1q9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-geogebra-3d-grapher-interface/sssss1q9"/>
      <lastmod>2026-11-01T22:02:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-geogebra-3d-grapher-interface/sssss1q9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-geogebra-3d-grapher-interface/sssss1q9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-geogebra-3d-grapher-interface/sssss1q9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-geogebra-3d-grapher-interface/sssss1q9"/>
      <lastmod>2026-11-01T22:02:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-laws-1/sssss1qe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-laws-1/sssss1qe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-laws-1/sssss1qe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-laws-1/sssss1qe"/>
      <lastmod>2026-11-01T20:44:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-laws-1/sssss1qe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-laws-1/sssss1qe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-laws-1/sssss1qe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-laws-1/sssss1qe"/>
      <lastmod>2026-11-01T20:44:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-general-example/sssss1qv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-general-example/sssss1qv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-general-example/sssss1qv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-general-example/sssss1qv"/>
      <lastmod>2026-11-02T18:36:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-general-example/sssss1qv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-general-example/sssss1qv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-general-example/sssss1qv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-general-example/sssss1qv"/>
      <lastmod>2026-11-02T18:36:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-showing-coordinates-of-certain-points/sssss1q4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-showing-coordinates-of-certain-points/sssss1q4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-showing-coordinates-of-certain-points/sssss1q4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-showing-coordinates-of-certain-points/sssss1q4"/>
      <lastmod>2026-11-01T21:32:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-showing-coordinates-of-certain-points/sssss1q4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-showing-coordinates-of-certain-points/sssss1q4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-showing-coordinates-of-certain-points/sssss1q4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-showing-coordinates-of-certain-points/sssss1q4"/>
      <lastmod>2026-11-01T21:32:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/direct-and-partial-variation-demo/sssss1ql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direct-and-partial-variation-demo/sssss1ql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direct-and-partial-variation-demo/sssss1ql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direct-and-partial-variation-demo/sssss1ql"/>
      <lastmod>2026-11-02T00:06:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/direct-and-partial-variation-demo/sssss1ql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direct-and-partial-variation-demo/sssss1ql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direct-and-partial-variation-demo/sssss1ql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direct-and-partial-variation-demo/sssss1ql"/>
      <lastmod>2026-11-02T00:06:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumcircle-of-a-triangle-by-geogebra-team/sssss1qy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcircle-of-a-triangle-by-geogebra-team/sssss1qy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcircle-of-a-triangle-by-geogebra-team/sssss1qy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcircle-of-a-triangle-by-geogebra-team/sssss1qy"/>
      <lastmod>2026-11-02T02:25:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumcircle-of-a-triangle-by-geogebra-team/sssss1qy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcircle-of-a-triangle-by-geogebra-team/sssss1qy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcircle-of-a-triangle-by-geogebra-team/sssss1qy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcircle-of-a-triangle-by-geogebra-team/sssss1qy"/>
      <lastmod>2026-11-02T02:25:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/physics-equilibrium-single-triangle-component-vectors/sssss1qa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/physics-equilibrium-single-triangle-component-vectors/sssss1qa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/physics-equilibrium-single-triangle-component-vectors/sssss1qa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/physics-equilibrium-single-triangle-component-vectors/sssss1qa"/>
      <lastmod>2026-11-01T23:16:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/physics-equilibrium-single-triangle-component-vectors/sssss1qa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/physics-equilibrium-single-triangle-component-vectors/sssss1qa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/physics-equilibrium-single-triangle-component-vectors/sssss1qa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/physics-equilibrium-single-triangle-component-vectors/sssss1qa"/>
      <lastmod>2026-11-01T23:16:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-to-square-puzzle/sssss1qc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-to-square-puzzle/sssss1qc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-to-square-puzzle/sssss1qc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-to-square-puzzle/sssss1qc"/>
      <lastmod>2026-11-02T03:04:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-to-square-puzzle/sssss1qc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-to-square-puzzle/sssss1qc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-to-square-puzzle/sssss1qc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-to-square-puzzle/sssss1qc"/>
      <lastmod>2026-11-02T03:04:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sketching-reflections-of-parabolas/sssss1qr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketching-reflections-of-parabolas/sssss1qr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketching-reflections-of-parabolas/sssss1qr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketching-reflections-of-parabolas/sssss1qr"/>
      <lastmod>2026-11-02T02:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sketching-reflections-of-parabolas/sssss1qr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketching-reflections-of-parabolas/sssss1qr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketching-reflections-of-parabolas/sssss1qr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketching-reflections-of-parabolas/sssss1qr"/>
      <lastmod>2026-11-02T02:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-segment-dilations-exploration/sssss1qh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-dilations-exploration/sssss1qh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-dilations-exploration/sssss1qh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-dilations-exploration/sssss1qh"/>
      <lastmod>2026-11-02T10:44:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-segment-dilations-exploration/sssss1qh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-dilations-exploration/sssss1qh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-dilations-exploration/sssss1qh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-dilations-exploration/sssss1qh"/>
      <lastmod>2026-11-02T10:44:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unfolding-of-the-oblique-section-of-a-cylinder/sssss1qt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unfolding-of-the-oblique-section-of-a-cylinder/sssss1qt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unfolding-of-the-oblique-section-of-a-cylinder/sssss1qt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unfolding-of-the-oblique-section-of-a-cylinder/sssss1qt"/>
      <lastmod>2026-11-01T19:13:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unfolding-of-the-oblique-section-of-a-cylinder/sssss1qt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unfolding-of-the-oblique-section-of-a-cylinder/sssss1qt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unfolding-of-the-oblique-section-of-a-cylinder/sssss1qt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unfolding-of-the-oblique-section-of-a-cylinder/sssss1qt"/>
      <lastmod>2026-11-01T19:13:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/correlation-scatter-plot/sssss1qx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-scatter-plot/sssss1qx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-scatter-plot/sssss1qx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-scatter-plot/sssss1qx"/>
      <lastmod>2026-11-02T17:43:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/correlation-scatter-plot/sssss1qx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-scatter-plot/sssss1qx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-scatter-plot/sssss1qx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-scatter-plot/sssss1qx"/>
      <lastmod>2026-11-02T17:43:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploration-of-circle-area/sssss1qi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-of-circle-area/sssss1qi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-of-circle-area/sssss1qi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-of-circle-area/sssss1qi"/>
      <lastmod>2026-11-01T20:51:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploration-of-circle-area/sssss1qi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-of-circle-area/sssss1qi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-of-circle-area/sssss1qi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-of-circle-area/sssss1qi"/>
      <lastmod>2026-11-01T20:51:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/resultant-vectors/sssss1qo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/resultant-vectors/sssss1qo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/resultant-vectors/sssss1qo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/resultant-vectors/sssss1qo"/>
      <lastmod>2026-11-02T16:45:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/resultant-vectors/sssss1qo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/resultant-vectors/sssss1qo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/resultant-vectors/sssss1qo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/resultant-vectors/sssss1qo"/>
      <lastmod>2026-11-02T16:45:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-and-isosceles-trapezoid-geometric-construction-and-properties/sssss11s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-isosceles-trapezoid-geometric-construction-and-properties/sssss11s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-isosceles-trapezoid-geometric-construction-and-properties/sssss11s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-isosceles-trapezoid-geometric-construction-and-properties/sssss11s"/>
      <lastmod>2026-11-02T00:23:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-and-isosceles-trapezoid-geometric-construction-and-properties/sssss11s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-isosceles-trapezoid-geometric-construction-and-properties/sssss11s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-isosceles-trapezoid-geometric-construction-and-properties/sssss11s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-isosceles-trapezoid-geometric-construction-and-properties/sssss11s"/>
      <lastmod>2026-11-02T00:23:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-hexagon-and-polygon/sssss117</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-hexagon-and-polygon/sssss117"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-hexagon-and-polygon/sssss117"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-hexagon-and-polygon/sssss117"/>
      <lastmod>2026-11-02T02:14:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-hexagon-and-polygon/sssss117</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-hexagon-and-polygon/sssss117"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-hexagon-and-polygon/sssss117"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-hexagon-and-polygon/sssss117"/>
      <lastmod>2026-11-02T02:14:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point/sssss11n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point/sssss11n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point/sssss11n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point/sssss11n"/>
      <lastmod>2026-11-02T18:03:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point/sssss11n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point/sssss11n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point/sssss11n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point/sssss11n"/>
      <lastmod>2026-11-02T18:03:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-points-on-a-sphere-r-x-y-z-and-x-y-z-r/sssss112</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-points-on-a-sphere-r-x-y-z-and-x-y-z-r/sssss112"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-points-on-a-sphere-r-x-y-z-and-x-y-z-r/sssss112"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-points-on-a-sphere-r-x-y-z-and-x-y-z-r/sssss112"/>
      <lastmod>2026-11-02T02:52:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-points-on-a-sphere-r-x-y-z-and-x-y-z-r/sssss112</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-points-on-a-sphere-r-x-y-z-and-x-y-z-r/sssss112"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-points-on-a-sphere-r-x-y-z-and-x-y-z-r/sssss112"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-points-on-a-sphere-r-x-y-z-and-x-y-z-r/sssss112"/>
      <lastmod>2026-11-02T02:52:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-in-a-line/sssss11k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-a-line/sssss11k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-a-line/sssss11k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-a-line/sssss11k"/>
      <lastmod>2026-11-01T20:53:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-in-a-line/sssss11k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-a-line/sssss11k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-a-line/sssss11k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-a-line/sssss11k"/>
      <lastmod>2026-11-01T20:53:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-without-words-sum-of-odd-numbers-equals-square-numbers/sssss11z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-sum-of-odd-numbers-equals-square-numbers/sssss11z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-sum-of-odd-numbers-equals-square-numbers/sssss11z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-sum-of-odd-numbers-equals-square-numbers/sssss11z"/>
      <lastmod>2026-11-01T19:16:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-without-words-sum-of-odd-numbers-equals-square-numbers/sssss11z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-sum-of-odd-numbers-equals-square-numbers/sssss11z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-sum-of-odd-numbers-equals-square-numbers/sssss11z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-sum-of-odd-numbers-equals-square-numbers/sssss11z"/>
      <lastmod>2026-11-01T19:16:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/magic-four-times-table/sssss110</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magic-four-times-table/sssss110"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magic-four-times-table/sssss110"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magic-four-times-table/sssss110"/>
      <lastmod>2026-11-01T23:10:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/magic-four-times-table/sssss110</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magic-four-times-table/sssss110"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magic-four-times-table/sssss110"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magic-four-times-table/sssss110"/>
      <lastmod>2026-11-01T23:10:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruent-triangles-practice-2/sssss11d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-triangles-practice-2/sssss11d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-triangles-practice-2/sssss11d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-triangles-practice-2/sssss11d"/>
      <lastmod>2026-11-02T18:31:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruent-triangles-practice-2/sssss11d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-triangles-practice-2/sssss11d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-triangles-practice-2/sssss11d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-triangles-practice-2/sssss11d"/>
      <lastmod>2026-11-02T18:31:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-locus-demonstration/sssss11f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-locus-demonstration/sssss11f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-locus-demonstration/sssss11f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-locus-demonstration/sssss11f"/>
      <lastmod>2026-11-01T23:52:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-locus-demonstration/sssss11f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-locus-demonstration/sssss11f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-locus-demonstration/sssss11f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-locus-demonstration/sssss11f"/>
      <lastmod>2026-11-01T23:52:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-quadrilateral-theorem/sssss118</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-quadrilateral-theorem/sssss118"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-quadrilateral-theorem/sssss118"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-quadrilateral-theorem/sssss118"/>
      <lastmod>2026-11-02T18:37:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-quadrilateral-theorem/sssss118</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-quadrilateral-theorem/sssss118"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-quadrilateral-theorem/sssss118"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-quadrilateral-theorem/sssss118"/>
      <lastmod>2026-11-02T18:37:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-addition-by-sean-kelleher/sssss11u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-by-sean-kelleher/sssss11u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-by-sean-kelleher/sssss11u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-by-sean-kelleher/sssss11u"/>
      <lastmod>2026-11-02T03:16:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-addition-by-sean-kelleher/sssss11u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-by-sean-kelleher/sssss11u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-by-sean-kelleher/sssss11u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-by-sean-kelleher/sssss11u"/>
      <lastmod>2026-11-02T03:16:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-plane-to-sphere/sssss115</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-plane-to-sphere/sssss115"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-plane-to-sphere/sssss115"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-plane-to-sphere/sssss115"/>
      <lastmod>2026-11-02T12:40:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-plane-to-sphere/sssss115</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-plane-to-sphere/sssss115"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-plane-to-sphere/sssss115"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-plane-to-sphere/sssss115"/>
      <lastmod>2026-11-02T12:40:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-involving-indices/sssss11b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-involving-indices/sssss11b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-involving-indices/sssss11b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-involving-indices/sssss11b"/>
      <lastmod>2026-11-02T18:03:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-involving-indices/sssss11b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-involving-indices/sssss11b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-involving-indices/sssss11b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-involving-indices/sssss11b"/>
      <lastmod>2026-11-02T18:03:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-characteristics/sssss113</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-characteristics/sssss113"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-characteristics/sssss113"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-characteristics/sssss113"/>
      <lastmod>2026-11-01T23:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-characteristics/sssss113</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-characteristics/sssss113"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-characteristics/sssss113"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-characteristics/sssss113"/>
      <lastmod>2026-11-01T23:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-number-line/sssss11q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-number-line/sssss11q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-number-line/sssss11q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-number-line/sssss11q"/>
      <lastmod>2026-11-02T17:52:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-number-line/sssss11q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-number-line/sssss11q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-number-line/sssss11q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-number-line/sssss11q"/>
      <lastmod>2026-11-02T17:52:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-practice-problem-2/sssss111</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-practice-problem-2/sssss111"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-practice-problem-2/sssss111"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-practice-problem-2/sssss111"/>
      <lastmod>2026-11-02T17:16:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-practice-problem-2/sssss111</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-practice-problem-2/sssss111"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-practice-problem-2/sssss111"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-practice-problem-2/sssss111"/>
      <lastmod>2026-11-02T17:16:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/refraction-with-lens-and-sphere/sssss11m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/refraction-with-lens-and-sphere/sssss11m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/refraction-with-lens-and-sphere/sssss11m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/refraction-with-lens-and-sphere/sssss11m"/>
      <lastmod>2026-11-02T18:27:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/refraction-with-lens-and-sphere/sssss11m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/refraction-with-lens-and-sphere/sssss11m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/refraction-with-lens-and-sphere/sssss11m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/refraction-with-lens-and-sphere/sssss11m"/>
      <lastmod>2026-11-02T18:27:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directional-derivative-002-dynamic-visualization-along-rays-and-curves/sssss11j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-002-dynamic-visualization-along-rays-and-curves/sssss11j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivative-002-dynamic-visualization-along-rays-and-curves/sssss11j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivative-002-dynamic-visualization-along-rays-and-curves/sssss11j"/>
      <lastmod>2026-11-02T17:45:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directional-derivative-002-dynamic-visualization-along-rays-and-curves/sssss11j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-002-dynamic-visualization-along-rays-and-curves/sssss11j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivative-002-dynamic-visualization-along-rays-and-curves/sssss11j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivative-002-dynamic-visualization-along-rays-and-curves/sssss11j"/>
      <lastmod>2026-11-02T17:45:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/writing-a-conjecture-about-isosceles-triangles/sssss11p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-a-conjecture-about-isosceles-triangles/sssss11p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-a-conjecture-about-isosceles-triangles/sssss11p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-a-conjecture-about-isosceles-triangles/sssss11p"/>
      <lastmod>2026-11-02T15:08:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/writing-a-conjecture-about-isosceles-triangles/sssss11p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-a-conjecture-about-isosceles-triangles/sssss11p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-a-conjecture-about-isosceles-triangles/sssss11p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-a-conjecture-about-isosceles-triangles/sssss11p"/>
      <lastmod>2026-11-02T15:08:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/imaginary-numbers-demo/sssss11w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/imaginary-numbers-demo/sssss11w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/imaginary-numbers-demo/sssss11w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/imaginary-numbers-demo/sssss11w"/>
      <lastmod>2026-11-02T12:49:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/imaginary-numbers-demo/sssss11w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/imaginary-numbers-demo/sssss11w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/imaginary-numbers-demo/sssss11w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/imaginary-numbers-demo/sssss11w"/>
      <lastmod>2026-11-02T12:49:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumference-of-a-circle-using-i-riemann-sum-derivative/sssss116</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumference-of-a-circle-using-i-riemann-sum-derivative/sssss116"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumference-of-a-circle-using-i-riemann-sum-derivative/sssss116"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumference-of-a-circle-using-i-riemann-sum-derivative/sssss116"/>
      <lastmod>2026-11-02T16:55:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumference-of-a-circle-using-i-riemann-sum-derivative/sssss116</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumference-of-a-circle-using-i-riemann-sum-derivative/sssss116"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumference-of-a-circle-using-i-riemann-sum-derivative/sssss116"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumference-of-a-circle-using-i-riemann-sum-derivative/sssss116"/>
      <lastmod>2026-11-02T16:55:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-function-demonstration/sssss11g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-demonstration/sssss11g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-demonstration/sssss11g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-demonstration/sssss11g"/>
      <lastmod>2026-11-02T18:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-function-demonstration/sssss11g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-demonstration/sssss11g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-demonstration/sssss11g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-demonstration/sssss11g"/>
      <lastmod>2026-11-02T18:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-model-for-marcela-uftm/sssss119</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-model-for-marcela-uftm/sssss119"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-model-for-marcela-uftm/sssss119"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-model-for-marcela-uftm/sssss119"/>
      <lastmod>2026-11-01T23:24:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-model-for-marcela-uftm/sssss119</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-model-for-marcela-uftm/sssss119"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-model-for-marcela-uftm/sssss119"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-model-for-marcela-uftm/sssss119"/>
      <lastmod>2026-11-01T23:24:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-field-examples/sssss11e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-field-examples/sssss11e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-field-examples/sssss11e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-field-examples/sssss11e"/>
      <lastmod>2026-11-01T21:53:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-field-examples/sssss11e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-field-examples/sssss11e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-field-examples/sssss11e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-field-examples/sssss11e"/>
      <lastmod>2026-11-01T21:53:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mary-math-example/sssss11v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mary-math-example/sssss11v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mary-math-example/sssss11v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mary-math-example/sssss11v"/>
      <lastmod>2026-11-02T18:30:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mary-math-example/sssss11v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mary-math-example/sssss11v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mary-math-example/sssss11v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mary-math-example/sssss11v"/>
      <lastmod>2026-11-02T18:30:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/universal-geometric-constant-for-regular-polygons/sssss114</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/universal-geometric-constant-for-regular-polygons/sssss114"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/universal-geometric-constant-for-regular-polygons/sssss114"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/universal-geometric-constant-for-regular-polygons/sssss114"/>
      <lastmod>2026-11-02T02:41:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/universal-geometric-constant-for-regular-polygons/sssss114</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/universal-geometric-constant-for-regular-polygons/sssss114"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/universal-geometric-constant-for-regular-polygons/sssss114"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/universal-geometric-constant-for-regular-polygons/sssss114"/>
      <lastmod>2026-11-02T02:41:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limit-definition-demonstration/sssss11l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limit-definition-demonstration/sssss11l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limit-definition-demonstration/sssss11l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limit-definition-demonstration/sssss11l"/>
      <lastmod>2026-11-01T19:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limit-definition-demonstration/sssss11l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limit-definition-demonstration/sssss11l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limit-definition-demonstration/sssss11l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limit-definition-demonstration/sssss11l"/>
      <lastmod>2026-11-01T19:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p4-perimeter-and-median-line/sssss11y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p4-perimeter-and-median-line/sssss11y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p4-perimeter-and-median-line/sssss11y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p4-perimeter-and-median-line/sssss11y"/>
      <lastmod>2026-11-01T23:55:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p4-perimeter-and-median-line/sssss11y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p4-perimeter-and-median-line/sssss11y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p4-perimeter-and-median-line/sssss11y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p4-perimeter-and-median-line/sssss11y"/>
      <lastmod>2026-11-01T23:55:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-functions-by-lew-w-s/sssss11a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-functions-by-lew-w-s/sssss11a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-functions-by-lew-w-s/sssss11a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-functions-by-lew-w-s/sssss11a"/>
      <lastmod>2026-11-02T17:59:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-functions-by-lew-w-s/sssss11a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-functions-by-lew-w-s/sssss11a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-functions-by-lew-w-s/sssss11a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-functions-by-lew-w-s/sssss11a"/>
      <lastmod>2026-11-02T17:59:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-note-tangent-line-equation/sssss11c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-note-tangent-line-equation/sssss11c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-note-tangent-line-equation/sssss11c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-note-tangent-line-equation/sssss11c"/>
      <lastmod>2026-11-02T13:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-note-tangent-line-equation/sssss11c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-note-tangent-line-equation/sssss11c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-note-tangent-line-equation/sssss11c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-note-tangent-line-equation/sssss11c"/>
      <lastmod>2026-11-02T13:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-circle-graph-by-dragging/sssss11r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-circle-graph-by-dragging/sssss11r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-circle-graph-by-dragging/sssss11r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-circle-graph-by-dragging/sssss11r"/>
      <lastmod>2026-11-02T08:49:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-circle-graph-by-dragging/sssss11r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-circle-graph-by-dragging/sssss11r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-circle-graph-by-dragging/sssss11r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-circle-graph-by-dragging/sssss11r"/>
      <lastmod>2026-11-02T08:49:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-investigation/sssss11h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-investigation/sssss11h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-investigation/sssss11h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-investigation/sssss11h"/>
      <lastmod>2026-11-02T18:59:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-investigation/sssss11h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-investigation/sssss11h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-investigation/sssss11h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-investigation/sssss11h"/>
      <lastmod>2026-11-02T18:59:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-numbers-and-trigonometric-functions-practice/sssss11t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-and-trigonometric-functions-practice/sssss11t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-and-trigonometric-functions-practice/sssss11t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-and-trigonometric-functions-practice/sssss11t"/>
      <lastmod>2026-11-02T18:57:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-numbers-and-trigonometric-functions-practice/sssss11t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-and-trigonometric-functions-practice/sssss11t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-and-trigonometric-functions-practice/sssss11t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-and-trigonometric-functions-practice/sssss11t"/>
      <lastmod>2026-11-02T18:57:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-function-geometric-construction/sssss11x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-function-geometric-construction/sssss11x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-function-geometric-construction/sssss11x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-function-geometric-construction/sssss11x"/>
      <lastmod>2026-11-02T18:04:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-function-geometric-construction/sssss11x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-function-geometric-construction/sssss11x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-function-geometric-construction/sssss11x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-function-geometric-construction/sssss11x"/>
      <lastmod>2026-11-02T18:04:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisector-exploration/sssss11i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-exploration/sssss11i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-exploration/sssss11i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-exploration/sssss11i"/>
      <lastmod>2026-11-01T20:41:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisector-exploration/sssss11i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-exploration/sssss11i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-exploration/sssss11i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-exploration/sssss11i"/>
      <lastmod>2026-11-01T20:41:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-parallel-lines-by-jalencia-burchett/sssss11o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-parallel-lines-by-jalencia-burchett/sssss11o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-parallel-lines-by-jalencia-burchett/sssss11o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-parallel-lines-by-jalencia-burchett/sssss11o"/>
      <lastmod>2026-11-02T02:14:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-parallel-lines-by-jalencia-burchett/sssss11o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-parallel-lines-by-jalencia-burchett/sssss11o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-parallel-lines-by-jalencia-burchett/sssss11o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-parallel-lines-by-jalencia-burchett/sssss11o"/>
      <lastmod>2026-11-02T02:14:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/class-scatter-plot-and-best-fit-line/sssss1ms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/class-scatter-plot-and-best-fit-line/sssss1ms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/class-scatter-plot-and-best-fit-line/sssss1ms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/class-scatter-plot-and-best-fit-line/sssss1ms"/>
      <lastmod>2026-11-02T13:39:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/class-scatter-plot-and-best-fit-line/sssss1ms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/class-scatter-plot-and-best-fit-line/sssss1ms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/class-scatter-plot-and-best-fit-line/sssss1ms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/class-scatter-plot-and-best-fit-line/sssss1ms"/>
      <lastmod>2026-11-02T13:39:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spinning-demonstration/sssss1m7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spinning-demonstration/sssss1m7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spinning-demonstration/sssss1m7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spinning-demonstration/sssss1m7"/>
      <lastmod>2026-11-02T08:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spinning-demonstration/sssss1m7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spinning-demonstration/sssss1m7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spinning-demonstration/sssss1m7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spinning-demonstration/sssss1m7"/>
      <lastmod>2026-11-02T08:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sliding-trapezoids-activity-by-refeld/sssss1mn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliding-trapezoids-activity-by-refeld/sssss1mn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliding-trapezoids-activity-by-refeld/sssss1mn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliding-trapezoids-activity-by-refeld/sssss1mn"/>
      <lastmod>2026-11-02T17:05:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sliding-trapezoids-activity-by-refeld/sssss1mn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliding-trapezoids-activity-by-refeld/sssss1mn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliding-trapezoids-activity-by-refeld/sssss1mn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliding-trapezoids-activity-by-refeld/sssss1mn"/>
      <lastmod>2026-11-02T17:05:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-of-rational-functions-at-infinity-by-matthaios-antonopoulos/sssss1m2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-of-rational-functions-at-infinity-by-matthaios-antonopoulos/sssss1m2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-of-rational-functions-at-infinity-by-matthaios-antonopoulos/sssss1m2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-of-rational-functions-at-infinity-by-matthaios-antonopoulos/sssss1m2"/>
      <lastmod>2026-11-02T00:29:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-of-rational-functions-at-infinity-by-matthaios-antonopoulos/sssss1m2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-of-rational-functions-at-infinity-by-matthaios-antonopoulos/sssss1m2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-of-rational-functions-at-infinity-by-matthaios-antonopoulos/sssss1m2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-of-rational-functions-at-infinity-by-matthaios-antonopoulos/sssss1m2"/>
      <lastmod>2026-11-02T00:29:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/creating-basic-formative-assessment-geogebra-resource/sssss1mk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-basic-formative-assessment-geogebra-resource/sssss1mk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-basic-formative-assessment-geogebra-resource/sssss1mk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-basic-formative-assessment-geogebra-resource/sssss1mk"/>
      <lastmod>2026-11-01T21:36:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/creating-basic-formative-assessment-geogebra-resource/sssss1mk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-basic-formative-assessment-geogebra-resource/sssss1mk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-basic-formative-assessment-geogebra-resource/sssss1mk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-basic-formative-assessment-geogebra-resource/sssss1mk"/>
      <lastmod>2026-11-01T21:36:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/h-kite-filtered-report/sssss1mz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h-kite-filtered-report/sssss1mz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h-kite-filtered-report/sssss1mz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h-kite-filtered-report/sssss1mz"/>
      <lastmod>2026-11-01T19:14:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/h-kite-filtered-report/sssss1mz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h-kite-filtered-report/sssss1mz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h-kite-filtered-report/sssss1mz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h-kite-filtered-report/sssss1mz"/>
      <lastmod>2026-11-01T19:14:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/division-by-a-fraction/sssss1m0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-by-a-fraction/sssss1m0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-by-a-fraction/sssss1m0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-by-a-fraction/sssss1m0"/>
      <lastmod>2026-11-02T17:42:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/division-by-a-fraction/sssss1m0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-by-a-fraction/sssss1m0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-by-a-fraction/sssss1m0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-by-a-fraction/sssss1m0"/>
      <lastmod>2026-11-02T17:42:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tessellation-with-squares-and-hexagons/sssss1md</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tessellation-with-squares-and-hexagons/sssss1md"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tessellation-with-squares-and-hexagons/sssss1md"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tessellation-with-squares-and-hexagons/sssss1md"/>
      <lastmod>2026-11-02T02:33:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tessellation-with-squares-and-hexagons/sssss1md</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tessellation-with-squares-and-hexagons/sssss1md"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tessellation-with-squares-and-hexagons/sssss1md"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tessellation-with-squares-and-hexagons/sssss1md"/>
      <lastmod>2026-11-02T02:33:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visual-comparison-of-fractions-d-mentrard/sssss1mf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-comparison-of-fractions-d-mentrard/sssss1mf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-comparison-of-fractions-d-mentrard/sssss1mf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-comparison-of-fractions-d-mentrard/sssss1mf"/>
      <lastmod>2026-11-01T19:17:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visual-comparison-of-fractions-d-mentrard/sssss1mf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-comparison-of-fractions-d-mentrard/sssss1mf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-comparison-of-fractions-d-mentrard/sssss1mf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-comparison-of-fractions-d-mentrard/sssss1mf"/>
      <lastmod>2026-11-01T19:17:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/h-weyl-symmetry-example/sssss1m8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h-weyl-symmetry-example/sssss1m8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h-weyl-symmetry-example/sssss1m8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h-weyl-symmetry-example/sssss1m8"/>
      <lastmod>2026-11-02T17:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/h-weyl-symmetry-example/sssss1m8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h-weyl-symmetry-example/sssss1m8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h-weyl-symmetry-example/sssss1m8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h-weyl-symmetry-example/sssss1m8"/>
      <lastmod>2026-11-02T17:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-and-perpendicular-lines-by-isaac-tipler/sssss1mu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-and-perpendicular-lines-by-isaac-tipler/sssss1mu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-and-perpendicular-lines-by-isaac-tipler/sssss1mu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-and-perpendicular-lines-by-isaac-tipler/sssss1mu"/>
      <lastmod>2026-11-02T16:39:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-and-perpendicular-lines-by-isaac-tipler/sssss1mu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-and-perpendicular-lines-by-isaac-tipler/sssss1mu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-and-perpendicular-lines-by-isaac-tipler/sssss1mu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-and-perpendicular-lines-by-isaac-tipler/sssss1mu"/>
      <lastmod>2026-11-02T16:39:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/real-component-1-z-2-1-2/sssss1m5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-component-1-z-2-1-2/sssss1m5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-component-1-z-2-1-2/sssss1m5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-component-1-z-2-1-2/sssss1m5"/>
      <lastmod>2026-11-02T02:34:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/real-component-1-z-2-1-2/sssss1m5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-component-1-z-2-1-2/sssss1m5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-component-1-z-2-1-2/sssss1m5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-component-1-z-2-1-2/sssss1m5"/>
      <lastmod>2026-11-02T02:34:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-with-fraction-circles/sssss1mb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-with-fraction-circles/sssss1mb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-with-fraction-circles/sssss1mb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-with-fraction-circles/sssss1mb"/>
      <lastmod>2026-11-02T03:12:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-with-fraction-circles/sssss1mb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-with-fraction-circles/sssss1mb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-with-fraction-circles/sssss1mb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-with-fraction-circles/sssss1mb"/>
      <lastmod>2026-11-02T03:12:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dandelin-spheres-ellipse-and-sphere-geometry/sssss1m3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dandelin-spheres-ellipse-and-sphere-geometry/sssss1m3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dandelin-spheres-ellipse-and-sphere-geometry/sssss1m3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dandelin-spheres-ellipse-and-sphere-geometry/sssss1m3"/>
      <lastmod>2026-11-02T00:40:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dandelin-spheres-ellipse-and-sphere-geometry/sssss1m3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dandelin-spheres-ellipse-and-sphere-geometry/sssss1m3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dandelin-spheres-ellipse-and-sphere-geometry/sssss1m3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dandelin-spheres-ellipse-and-sphere-geometry/sssss1m3"/>
      <lastmod>2026-11-02T00:40:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curl-of-vector-field-on-a-surface/sssss1mq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curl-of-vector-field-on-a-surface/sssss1mq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curl-of-vector-field-on-a-surface/sssss1mq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curl-of-vector-field-on-a-surface/sssss1mq"/>
      <lastmod>2026-11-01T22:10:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curl-of-vector-field-on-a-surface/sssss1mq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curl-of-vector-field-on-a-surface/sssss1mq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curl-of-vector-field-on-a-surface/sssss1mq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curl-of-vector-field-on-a-surface/sssss1mq"/>
      <lastmod>2026-11-01T22:10:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-and-linear-function-interaction-demo/sssss1m1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-linear-function-interaction-demo/sssss1m1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-linear-function-interaction-demo/sssss1m1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-linear-function-interaction-demo/sssss1m1"/>
      <lastmod>2026-11-01T23:43:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-and-linear-function-interaction-demo/sssss1m1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-linear-function-interaction-demo/sssss1m1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-linear-function-interaction-demo/sssss1m1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-linear-function-interaction-demo/sssss1m1"/>
      <lastmod>2026-11-01T23:43:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im2-justify-the-type-of-transformation/sssss1mm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im2-justify-the-type-of-transformation/sssss1mm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im2-justify-the-type-of-transformation/sssss1mm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im2-justify-the-type-of-transformation/sssss1mm"/>
      <lastmod>2026-11-02T03:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im2-justify-the-type-of-transformation/sssss1mm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im2-justify-the-type-of-transformation/sssss1mm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im2-justify-the-type-of-transformation/sssss1mm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im2-justify-the-type-of-transformation/sssss1mm"/>
      <lastmod>2026-11-02T03:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angles-investigation-by-tim-brzezinski/sssss1mj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-investigation-by-tim-brzezinski/sssss1mj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-investigation-by-tim-brzezinski/sssss1mj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-investigation-by-tim-brzezinski/sssss1mj"/>
      <lastmod>2026-11-02T17:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angles-investigation-by-tim-brzezinski/sssss1mj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-investigation-by-tim-brzezinski/sssss1mj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-investigation-by-tim-brzezinski/sssss1mj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-investigation-by-tim-brzezinski/sssss1mj"/>
      <lastmod>2026-11-02T17:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-section-of-a-cube/sssss1mp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-cube/sssss1mp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-cube/sssss1mp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-cube/sssss1mp"/>
      <lastmod>2026-11-01T19:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-section-of-a-cube/sssss1mp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-cube/sssss1mp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-cube/sssss1mp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-cube/sssss1mp"/>
      <lastmod>2026-11-01T19:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-characteristics-of-squares-and-rectangles/sssss1mw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-characteristics-of-squares-and-rectangles/sssss1mw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-characteristics-of-squares-and-rectangles/sssss1mw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-characteristics-of-squares-and-rectangles/sssss1mw"/>
      <lastmod>2026-11-01T19:11:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-characteristics-of-squares-and-rectangles/sssss1mw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-characteristics-of-squares-and-rectangles/sssss1mw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-characteristics-of-squares-and-rectangles/sssss1mw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-characteristics-of-squares-and-rectangles/sssss1mw"/>
      <lastmod>2026-11-01T19:11:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dominance-and-limits-to-infinity-interactive-function-comparison/sssss1m6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dominance-and-limits-to-infinity-interactive-function-comparison/sssss1m6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dominance-and-limits-to-infinity-interactive-function-comparison/sssss1m6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dominance-and-limits-to-infinity-interactive-function-comparison/sssss1m6"/>
      <lastmod>2026-11-02T18:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dominance-and-limits-to-infinity-interactive-function-comparison/sssss1m6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dominance-and-limits-to-infinity-interactive-function-comparison/sssss1m6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dominance-and-limits-to-infinity-interactive-function-comparison/sssss1m6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dominance-and-limits-to-infinity-interactive-function-comparison/sssss1m6"/>
      <lastmod>2026-11-02T18:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modifiable-solid-parabolic-cross-sections-parallel-to-yaxis/sssss1mg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-parabolic-cross-sections-parallel-to-yaxis/sssss1mg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-parabolic-cross-sections-parallel-to-yaxis/sssss1mg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-parabolic-cross-sections-parallel-to-yaxis/sssss1mg"/>
      <lastmod>2026-11-01T21:15:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modifiable-solid-parabolic-cross-sections-parallel-to-yaxis/sssss1mg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-parabolic-cross-sections-parallel-to-yaxis/sssss1mg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-parabolic-cross-sections-parallel-to-yaxis/sssss1mg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-parabolic-cross-sections-parallel-to-yaxis/sssss1mg"/>
      <lastmod>2026-11-01T21:15:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-rhombus/sssss1m9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus/sssss1m9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rhombus/sssss1m9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus/sssss1m9"/>
      <lastmod>2026-11-01T21:09:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-rhombus/sssss1m9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus/sssss1m9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rhombus/sssss1m9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus/sssss1m9"/>
      <lastmod>2026-11-01T21:09:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-exploration/sssss1me</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-exploration/sssss1me"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-exploration/sssss1me"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-exploration/sssss1me"/>
      <lastmod>2026-11-01T21:02:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-exploration/sssss1me</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-exploration/sssss1me"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-exploration/sssss1me"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-exploration/sssss1me"/>
      <lastmod>2026-11-01T21:02:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tnb-frame-and-planes/sssss1mv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tnb-frame-and-planes/sssss1mv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tnb-frame-and-planes/sssss1mv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tnb-frame-and-planes/sssss1mv"/>
      <lastmod>2026-11-01T23:45:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tnb-frame-and-planes/sssss1mv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tnb-frame-and-planes/sssss1mv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tnb-frame-and-planes/sssss1mv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tnb-frame-and-planes/sssss1mv"/>
      <lastmod>2026-11-01T23:45:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/further-hypothesis-tests/sssss1m4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/further-hypothesis-tests/sssss1m4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/further-hypothesis-tests/sssss1m4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/further-hypothesis-tests/sssss1m4"/>
      <lastmod>2026-11-02T09:35:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/further-hypothesis-tests/sssss1m4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/further-hypothesis-tests/sssss1m4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/further-hypothesis-tests/sssss1m4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/further-hypothesis-tests/sssss1m4"/>
      <lastmod>2026-11-02T09:35:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-5/sssss1ml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-5/sssss1ml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan-5/sssss1ml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-5/sssss1ml"/>
      <lastmod>2026-11-02T18:44:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan-5/sssss1ml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-5/sssss1ml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan-5/sssss1ml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-5/sssss1ml"/>
      <lastmod>2026-11-02T18:44:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-function-transformation/sssss1my</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-transformation/sssss1my"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-transformation/sssss1my"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-transformation/sssss1my"/>
      <lastmod>2026-11-02T13:36:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-function-transformation/sssss1my</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-transformation/sssss1my"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-transformation/sssss1my"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-transformation/sssss1my"/>
      <lastmod>2026-11-02T13:36:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/substitution-method-for-simultaneous-equations/sssss1ma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/substitution-method-for-simultaneous-equations/sssss1ma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/substitution-method-for-simultaneous-equations/sssss1ma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/substitution-method-for-simultaneous-equations/sssss1ma"/>
      <lastmod>2026-11-02T16:32:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/substitution-method-for-simultaneous-equations/sssss1ma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/substitution-method-for-simultaneous-equations/sssss1ma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/substitution-method-for-simultaneous-equations/sssss1ma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/substitution-method-for-simultaneous-equations/sssss1ma"/>
      <lastmod>2026-11-02T16:32:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagonal-pyramid-by-norm-prokup/sssss1mc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-pyramid-by-norm-prokup/sssss1mc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-pyramid-by-norm-prokup/sssss1mc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-pyramid-by-norm-prokup/sssss1mc"/>
      <lastmod>2026-11-02T18:05:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagonal-pyramid-by-norm-prokup/sssss1mc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-pyramid-by-norm-prokup/sssss1mc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-pyramid-by-norm-prokup/sssss1mc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-pyramid-by-norm-prokup/sssss1mc"/>
      <lastmod>2026-11-02T18:05:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-angle-bisector-construction/sssss1mr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-angle-bisector-construction/sssss1mr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-angle-bisector-construction/sssss1mr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-angle-bisector-construction/sssss1mr"/>
      <lastmod>2026-11-02T18:03:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-angle-bisector-construction/sssss1mr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-angle-bisector-construction/sssss1mr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-angle-bisector-construction/sssss1mr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-angle-bisector-construction/sssss1mr"/>
      <lastmod>2026-11-02T18:03:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-and-transformation-of-the-teka-logo/sssss1mh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-and-transformation-of-the-teka-logo/sssss1mh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-and-transformation-of-the-teka-logo/sssss1mh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-and-transformation-of-the-teka-logo/sssss1mh"/>
      <lastmod>2026-11-01T20:48:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-and-transformation-of-the-teka-logo/sssss1mh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-and-transformation-of-the-teka-logo/sssss1mh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-and-transformation-of-the-teka-logo/sssss1mh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-and-transformation-of-the-teka-logo/sssss1mh"/>
      <lastmod>2026-11-01T20:48:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-square-root-demonstration/sssss1mt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-square-root-demonstration/sssss1mt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-square-root-demonstration/sssss1mt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-square-root-demonstration/sssss1mt"/>
      <lastmod>2026-11-02T17:58:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-square-root-demonstration/sssss1mt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-square-root-demonstration/sssss1mt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-square-root-demonstration/sssss1mt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-square-root-demonstration/sssss1mt"/>
      <lastmod>2026-11-02T17:58:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/colin-2-geometric-construction/sssss1mx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/colin-2-geometric-construction/sssss1mx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/colin-2-geometric-construction/sssss1mx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/colin-2-geometric-construction/sssss1mx"/>
      <lastmod>2026-11-01T19:25:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/colin-2-geometric-construction/sssss1mx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/colin-2-geometric-construction/sssss1mx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/colin-2-geometric-construction/sssss1mx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/colin-2-geometric-construction/sssss1mx"/>
      <lastmod>2026-11-01T19:25:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-two-digit-numbers-by-one-digit-numbers/sssss1mi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-two-digit-numbers-by-one-digit-numbers/sssss1mi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-two-digit-numbers-by-one-digit-numbers/sssss1mi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-two-digit-numbers-by-one-digit-numbers/sssss1mi"/>
      <lastmod>2026-11-02T17:00:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-two-digit-numbers-by-one-digit-numbers/sssss1mi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-two-digit-numbers-by-one-digit-numbers/sssss1mi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-two-digit-numbers-by-one-digit-numbers/sssss1mi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-two-digit-numbers-by-one-digit-numbers/sssss1mi"/>
      <lastmod>2026-11-02T17:00:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-transformations-by-rasha-tarek/sssss1mo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-transformations-by-rasha-tarek/sssss1mo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-transformations-by-rasha-tarek/sssss1mo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-transformations-by-rasha-tarek/sssss1mo"/>
      <lastmod>2026-11-02T15:46:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-transformations-by-rasha-tarek/sssss1mo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-transformations-by-rasha-tarek/sssss1mo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-transformations-by-rasha-tarek/sssss1mo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-transformations-by-rasha-tarek/sssss1mo"/>
      <lastmod>2026-11-02T15:46:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-geometric-mean-inequality-demo/sssss1js</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-geometric-mean-inequality-demo/sssss1js"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-geometric-mean-inequality-demo/sssss1js"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-geometric-mean-inequality-demo/sssss1js"/>
      <lastmod>2026-11-02T16:41:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-geometric-mean-inequality-demo/sssss1js</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-geometric-mean-inequality-demo/sssss1js"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-geometric-mean-inequality-demo/sssss1js"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-geometric-mean-inequality-demo/sssss1js"/>
      <lastmod>2026-11-02T16:41:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-by-kaitlyn-valint/sssss1j7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-by-kaitlyn-valint/sssss1j7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-parallelogram-by-kaitlyn-valint/sssss1j7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-by-kaitlyn-valint/sssss1j7"/>
      <lastmod>2026-11-01T23:47:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-parallelogram-by-kaitlyn-valint/sssss1j7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-by-kaitlyn-valint/sssss1j7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-parallelogram-by-kaitlyn-valint/sssss1j7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-by-kaitlyn-valint/sssss1j7"/>
      <lastmod>2026-11-01T23:47:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolic-segment-archimedes-insight/sssss1jn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-segment-archimedes-insight/sssss1jn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-segment-archimedes-insight/sssss1jn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-segment-archimedes-insight/sssss1jn"/>
      <lastmod>2026-11-01T22:12:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabolic-segment-archimedes-insight/sssss1jn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-segment-archimedes-insight/sssss1jn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-segment-archimedes-insight/sssss1jn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-segment-archimedes-insight/sssss1jn"/>
      <lastmod>2026-11-01T22:12:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-function-derivative-trace/sssss1j2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-function-derivative-trace/sssss1j2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-function-derivative-trace/sssss1j2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-function-derivative-trace/sssss1j2"/>
      <lastmod>2026-11-01T22:03:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-function-derivative-trace/sssss1j2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-function-derivative-trace/sssss1j2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-function-derivative-trace/sssss1j2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-function-derivative-trace/sssss1j2"/>
      <lastmod>2026-11-01T22:03:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-of-fixed-distance-to-a-line-segment/sssss1jk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-fixed-distance-to-a-line-segment/sssss1jk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-fixed-distance-to-a-line-segment/sssss1jk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-fixed-distance-to-a-line-segment/sssss1jk"/>
      <lastmod>2026-11-02T16:36:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-of-fixed-distance-to-a-line-segment/sssss1jk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-fixed-distance-to-a-line-segment/sssss1jk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-fixed-distance-to-a-line-segment/sssss1jk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-fixed-distance-to-a-line-segment/sssss1jk"/>
      <lastmod>2026-11-02T16:36:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-sections-of-a-sphere/sssss1jz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-sphere/sssss1jz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-sphere/sssss1jz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-sphere/sssss1jz"/>
      <lastmod>2026-11-01T19:19:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-sections-of-a-sphere/sssss1jz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-sphere/sssss1jz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-sphere/sssss1jz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-sphere/sssss1jz"/>
      <lastmod>2026-11-01T19:19:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/building-with-12-snap-cubes/sssss1j0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/building-with-12-snap-cubes/sssss1j0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/building-with-12-snap-cubes/sssss1j0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/building-with-12-snap-cubes/sssss1j0"/>
      <lastmod>2026-11-02T03:18:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/building-with-12-snap-cubes/sssss1j0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/building-with-12-snap-cubes/sssss1j0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/building-with-12-snap-cubes/sssss1j0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/building-with-12-snap-cubes/sssss1j0"/>
      <lastmod>2026-11-02T03:18:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylindrical-volume-calculation/sssss1jd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-volume-calculation/sssss1jd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-volume-calculation/sssss1jd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-volume-calculation/sssss1jd"/>
      <lastmod>2026-11-02T13:50:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylindrical-volume-calculation/sssss1jd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-volume-calculation/sssss1jd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-volume-calculation/sssss1jd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-volume-calculation/sssss1jd"/>
      <lastmod>2026-11-02T13:50:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rdearth-orthocenter/sssss1jf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rdearth-orthocenter/sssss1jf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rdearth-orthocenter/sssss1jf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rdearth-orthocenter/sssss1jf"/>
      <lastmod>2026-11-02T18:41:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rdearth-orthocenter/sssss1jf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rdearth-orthocenter/sssss1jf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rdearth-orthocenter/sssss1jf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rdearth-orthocenter/sssss1jf"/>
      <lastmod>2026-11-02T18:41:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-affine-transformations/sssss1j8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-affine-transformations/sssss1j8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-affine-transformations/sssss1j8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-affine-transformations/sssss1j8"/>
      <lastmod>2026-11-02T08:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-affine-transformations/sssss1j8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-affine-transformations/sssss1j8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-affine-transformations/sssss1j8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-affine-transformations/sssss1j8"/>
      <lastmod>2026-11-02T08:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-a-sphere-by-steve-phelps/sssss1ju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-a-sphere-by-steve-phelps/sssss1ju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-a-sphere-by-steve-phelps/sssss1ju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-a-sphere-by-steve-phelps/sssss1ju"/>
      <lastmod>2026-11-01T23:29:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-a-sphere-by-steve-phelps/sssss1ju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-a-sphere-by-steve-phelps/sssss1ju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-a-sphere-by-steve-phelps/sssss1ju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-a-sphere-by-steve-phelps/sssss1ju"/>
      <lastmod>2026-11-01T23:29:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cutting-the-cube-with-an-interactive-plane-cross-sections-and-polyhedra/sssss1j5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cutting-the-cube-with-an-interactive-plane-cross-sections-and-polyhedra/sssss1j5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cutting-the-cube-with-an-interactive-plane-cross-sections-and-polyhedra/sssss1j5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cutting-the-cube-with-an-interactive-plane-cross-sections-and-polyhedra/sssss1j5"/>
      <lastmod>2026-11-01T19:03:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cutting-the-cube-with-an-interactive-plane-cross-sections-and-polyhedra/sssss1j5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cutting-the-cube-with-an-interactive-plane-cross-sections-and-polyhedra/sssss1j5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cutting-the-cube-with-an-interactive-plane-cross-sections-and-polyhedra/sssss1j5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cutting-the-cube-with-an-interactive-plane-cross-sections-and-polyhedra/sssss1j5"/>
      <lastmod>2026-11-01T19:03:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pair-of-straight-lines-in-double-cone/sssss1jb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pair-of-straight-lines-in-double-cone/sssss1jb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pair-of-straight-lines-in-double-cone/sssss1jb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pair-of-straight-lines-in-double-cone/sssss1jb"/>
      <lastmod>2026-11-02T18:39:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pair-of-straight-lines-in-double-cone/sssss1jb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pair-of-straight-lines-in-double-cone/sssss1jb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pair-of-straight-lines-in-double-cone/sssss1jb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pair-of-straight-lines-in-double-cone/sssss1jb"/>
      <lastmod>2026-11-02T18:39:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-coordinates-dynamic-illustration/sssss1j3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-dynamic-illustration/sssss1j3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-dynamic-illustration/sssss1j3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-dynamic-illustration/sssss1j3"/>
      <lastmod>2026-11-02T16:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-coordinates-dynamic-illustration/sssss1j3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-dynamic-illustration/sssss1j3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-dynamic-illustration/sssss1j3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-dynamic-illustration/sssss1j3"/>
      <lastmod>2026-11-02T16:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/numbers-in-different-bases/sssss1jq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numbers-in-different-bases/sssss1jq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numbers-in-different-bases/sssss1jq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numbers-in-different-bases/sssss1jq"/>
      <lastmod>2026-11-01T21:26:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/numbers-in-different-bases/sssss1jq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numbers-in-different-bases/sssss1jq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numbers-in-different-bases/sssss1jq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numbers-in-different-bases/sssss1jq"/>
      <lastmod>2026-11-01T21:26:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-logarithm-change-of-base-formula-log-b-x-ln-x-ln-b/sssss1j1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-logarithm-change-of-base-formula-log-b-x-ln-x-ln-b/sssss1j1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-logarithm-change-of-base-formula-log-b-x-ln-x-ln-b/sssss1j1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-logarithm-change-of-base-formula-log-b-x-ln-x-ln-b/sssss1j1"/>
      <lastmod>2026-11-02T13:24:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-logarithm-change-of-base-formula-log-b-x-ln-x-ln-b/sssss1j1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-logarithm-change-of-base-formula-log-b-x-ln-x-ln-b/sssss1j1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-logarithm-change-of-base-formula-log-b-x-ln-x-ln-b/sssss1j1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-logarithm-change-of-base-formula-log-b-x-ln-x-ln-b/sssss1j1"/>
      <lastmod>2026-11-02T13:24:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bisect-a-line-segment/sssss1jm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisect-a-line-segment/sssss1jm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisect-a-line-segment/sssss1jm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisect-a-line-segment/sssss1jm"/>
      <lastmod>2026-11-01T21:39:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bisect-a-line-segment/sssss1jm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisect-a-line-segment/sssss1jm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisect-a-line-segment/sssss1jm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisect-a-line-segment/sssss1jm"/>
      <lastmod>2026-11-01T21:39:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-property-dynamic-demonstration/sssss1jj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-property-dynamic-demonstration/sssss1jj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-property-dynamic-demonstration/sssss1jj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-property-dynamic-demonstration/sssss1jj"/>
      <lastmod>2026-11-02T02:21:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-property-dynamic-demonstration/sssss1jj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-property-dynamic-demonstration/sssss1jj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-property-dynamic-demonstration/sssss1jj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-property-dynamic-demonstration/sssss1jj"/>
      <lastmod>2026-11-02T02:21:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-construction-with-compass-2/sssss1jp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-construction-with-compass-2/sssss1jp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-construction-with-compass-2/sssss1jp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-construction-with-compass-2/sssss1jp"/>
      <lastmod>2026-11-02T16:42:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-construction-with-compass-2/sssss1jp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-construction-with-compass-2/sssss1jp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-construction-with-compass-2/sssss1jp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-construction-with-compass-2/sssss1jp"/>
      <lastmod>2026-11-02T16:42:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/steiner-ellipses/sssss1jw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steiner-ellipses/sssss1jw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steiner-ellipses/sssss1jw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steiner-ellipses/sssss1jw"/>
      <lastmod>2026-11-02T16:50:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/steiner-ellipses/sssss1jw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steiner-ellipses/sssss1jw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steiner-ellipses/sssss1jw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steiner-ellipses/sssss1jw"/>
      <lastmod>2026-11-02T16:50:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-andreea-m-example/sssss1j6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-andreea-m-example/sssss1j6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-andreea-m-example/sssss1j6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-andreea-m-example/sssss1j6"/>
      <lastmod>2026-11-01T22:00:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-andreea-m-example/sssss1j6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-andreea-m-example/sssss1j6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-andreea-m-example/sssss1j6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-andreea-m-example/sssss1j6"/>
      <lastmod>2026-11-01T22:00:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/seat-cushion-or-pool-float-geogebra-ar-quick-demo/sssss1jg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/seat-cushion-or-pool-float-geogebra-ar-quick-demo/sssss1jg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/seat-cushion-or-pool-float-geogebra-ar-quick-demo/sssss1jg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/seat-cushion-or-pool-float-geogebra-ar-quick-demo/sssss1jg"/>
      <lastmod>2026-11-01T23:43:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/seat-cushion-or-pool-float-geogebra-ar-quick-demo/sssss1jg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/seat-cushion-or-pool-float-geogebra-ar-quick-demo/sssss1jg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/seat-cushion-or-pool-float-geogebra-ar-quick-demo/sssss1jg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/seat-cushion-or-pool-float-geogebra-ar-quick-demo/sssss1jg"/>
      <lastmod>2026-11-01T23:43:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-functions/sssss1j9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-functions/sssss1j9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-and-vertical-translations-of-functions/sssss1j9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-functions/sssss1j9"/>
      <lastmod>2026-11-01T21:19:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-and-vertical-translations-of-functions/sssss1j9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-functions/sssss1j9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-and-vertical-translations-of-functions/sssss1j9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-functions/sssss1j9"/>
      <lastmod>2026-11-01T21:19:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-mean-altitude-theorem/sssss1je</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-altitude-theorem/sssss1je"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-altitude-theorem/sssss1je"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-altitude-theorem/sssss1je"/>
      <lastmod>2026-11-02T02:54:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-mean-altitude-theorem/sssss1je</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-altitude-theorem/sssss1je"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-altitude-theorem/sssss1je"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-altitude-theorem/sssss1je"/>
      <lastmod>2026-11-02T02:54:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-and-geometric-transformations/sssss1jv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-and-geometric-transformations/sssss1jv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-and-geometric-transformations/sssss1jv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-and-geometric-transformations/sssss1jv"/>
      <lastmod>2026-11-02T13:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-and-geometric-transformations/sssss1jv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-and-geometric-transformations/sssss1jv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-and-geometric-transformations/sssss1jv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-and-geometric-transformations/sssss1jv"/>
      <lastmod>2026-11-02T13:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-on-a-sphere/sssss1j4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-on-a-sphere/sssss1j4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-on-a-sphere/sssss1j4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-on-a-sphere/sssss1j4"/>
      <lastmod>2026-11-02T17:45:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-on-a-sphere/sssss1j4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-on-a-sphere/sssss1j4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-on-a-sphere/sssss1j4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-on-a-sphere/sssss1j4"/>
      <lastmod>2026-11-02T17:45:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-surface-area-calculation-by-n-roach/sssss1jl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-calculation-by-n-roach/sssss1jl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-surface-area-calculation-by-n-roach/sssss1jl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-calculation-by-n-roach/sssss1jl"/>
      <lastmod>2026-11-02T17:13:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-surface-area-calculation-by-n-roach/sssss1jl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-calculation-by-n-roach/sssss1jl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-surface-area-calculation-by-n-roach/sssss1jl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-calculation-by-n-roach/sssss1jl"/>
      <lastmod>2026-11-02T17:13:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-inverse-trig-graphs/sssss1jy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-inverse-trig-graphs/sssss1jy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-inverse-trig-graphs/sssss1jy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-inverse-trig-graphs/sssss1jy"/>
      <lastmod>2026-11-02T08:28:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-inverse-trig-graphs/sssss1jy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-inverse-trig-graphs/sssss1jy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-inverse-trig-graphs/sssss1jy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-inverse-trig-graphs/sssss1jy"/>
      <lastmod>2026-11-02T08:28:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-s-bastien-vieilhescazes/sssss1ja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-s-bastien-vieilhescazes/sssss1ja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-s-bastien-vieilhescazes/sssss1ja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-s-bastien-vieilhescazes/sssss1ja"/>
      <lastmod>2026-11-02T16:38:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-s-bastien-vieilhescazes/sssss1ja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-s-bastien-vieilhescazes/sssss1ja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-s-bastien-vieilhescazes/sssss1ja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-s-bastien-vieilhescazes/sssss1ja"/>
      <lastmod>2026-11-02T16:38:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-cube-root-of-x/sssss1jc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-cube-root-of-x/sssss1jc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-cube-root-of-x/sssss1jc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-cube-root-of-x/sssss1jc"/>
      <lastmod>2026-11-02T00:36:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-cube-root-of-x/sssss1jc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-cube-root-of-x/sssss1jc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-cube-root-of-x/sssss1jc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-cube-root-of-x/sssss1jc"/>
      <lastmod>2026-11-02T00:36:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unified-definition-of-conic-sections/sssss1jr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unified-definition-of-conic-sections/sssss1jr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unified-definition-of-conic-sections/sssss1jr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unified-definition-of-conic-sections/sssss1jr"/>
      <lastmod>2026-11-01T23:39:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unified-definition-of-conic-sections/sssss1jr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unified-definition-of-conic-sections/sssss1jr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unified-definition-of-conic-sections/sssss1jr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unified-definition-of-conic-sections/sssss1jr"/>
      <lastmod>2026-11-01T23:39:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/steffen-congruent-figures-dynamic-illustration/sssss1jh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steffen-congruent-figures-dynamic-illustration/sssss1jh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steffen-congruent-figures-dynamic-illustration/sssss1jh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steffen-congruent-figures-dynamic-illustration/sssss1jh"/>
      <lastmod>2026-11-02T17:37:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/steffen-congruent-figures-dynamic-illustration/sssss1jh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steffen-congruent-figures-dynamic-illustration/sssss1jh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steffen-congruent-figures-dynamic-illustration/sssss1jh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steffen-congruent-figures-dynamic-illustration/sssss1jh"/>
      <lastmod>2026-11-02T17:37:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-lines-demonstration/sssss1jt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-lines-demonstration/sssss1jt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-lines-demonstration/sssss1jt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-lines-demonstration/sssss1jt"/>
      <lastmod>2026-11-02T02:47:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-lines-demonstration/sssss1jt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-lines-demonstration/sssss1jt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-lines-demonstration/sssss1jt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-lines-demonstration/sssss1jt"/>
      <lastmod>2026-11-02T02:47:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-orthocenter-demo/sssss1jx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-orthocenter-demo/sssss1jx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-orthocenter-demo/sssss1jx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-orthocenter-demo/sssss1jx"/>
      <lastmod>2026-11-02T18:40:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-orthocenter-demo/sssss1jx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-orthocenter-demo/sssss1jx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-orthocenter-demo/sssss1jx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-orthocenter-demo/sssss1jx"/>
      <lastmod>2026-11-02T18:40:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/corresponding-angle-measures/sssss1ji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corresponding-angle-measures/sssss1ji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corresponding-angle-measures/sssss1ji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corresponding-angle-measures/sssss1ji"/>
      <lastmod>2026-11-02T10:42:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/corresponding-angle-measures/sssss1ji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corresponding-angle-measures/sssss1ji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corresponding-angle-measures/sssss1ji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corresponding-angle-measures/sssss1ji"/>
      <lastmod>2026-11-02T10:42:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rgb-scheme-based-on-modulus-and-phase-of-complex-numbers/sssss1jo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rgb-scheme-based-on-modulus-and-phase-of-complex-numbers/sssss1jo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rgb-scheme-based-on-modulus-and-phase-of-complex-numbers/sssss1jo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rgb-scheme-based-on-modulus-and-phase-of-complex-numbers/sssss1jo"/>
      <lastmod>2026-11-01T21:06:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rgb-scheme-based-on-modulus-and-phase-of-complex-numbers/sssss1jo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rgb-scheme-based-on-modulus-and-phase-of-complex-numbers/sssss1jo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rgb-scheme-based-on-modulus-and-phase-of-complex-numbers/sssss1jo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rgb-scheme-based-on-modulus-and-phase-of-complex-numbers/sssss1jo"/>
      <lastmod>2026-11-01T21:06:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demo-of-complex-numbers-and-unit-circle/sssss1ps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-complex-numbers-and-unit-circle/sssss1ps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-complex-numbers-and-unit-circle/sssss1ps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-complex-numbers-and-unit-circle/sssss1ps"/>
      <lastmod>2026-11-01T20:53:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demo-of-complex-numbers-and-unit-circle/sssss1ps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-complex-numbers-and-unit-circle/sssss1ps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-complex-numbers-and-unit-circle/sssss1ps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-complex-numbers-and-unit-circle/sssss1ps"/>
      <lastmod>2026-11-01T20:53:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/positive-integer-power-functions/sssss1p7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/positive-integer-power-functions/sssss1p7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/positive-integer-power-functions/sssss1p7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/positive-integer-power-functions/sssss1p7"/>
      <lastmod>2026-11-02T17:03:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/positive-integer-power-functions/sssss1p7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/positive-integer-power-functions/sssss1p7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/positive-integer-power-functions/sssss1p7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/positive-integer-power-functions/sssss1p7"/>
      <lastmod>2026-11-02T17:03:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-calculation-of-rotated-solids/sssss1pn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-of-rotated-solids/sssss1pn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-of-rotated-solids/sssss1pn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-of-rotated-solids/sssss1pn"/>
      <lastmod>2026-11-02T03:15:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-calculation-of-rotated-solids/sssss1pn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-of-rotated-solids/sssss1pn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-of-rotated-solids/sssss1pn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-of-rotated-solids/sssss1pn"/>
      <lastmod>2026-11-02T03:15:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-equilateral-and-isosceles-triangles/sssss1p2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-equilateral-and-isosceles-triangles/sssss1p2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-equilateral-and-isosceles-triangles/sssss1p2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-equilateral-and-isosceles-triangles/sssss1p2"/>
      <lastmod>2026-11-02T18:58:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-equilateral-and-isosceles-triangles/sssss1p2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-equilateral-and-isosceles-triangles/sssss1p2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-equilateral-and-isosceles-triangles/sssss1p2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-equilateral-and-isosceles-triangles/sssss1p2"/>
      <lastmod>2026-11-02T18:58:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/thales-theorem-by-jorge-c-ssio/sssss1pk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/thales-theorem-by-jorge-c-ssio/sssss1pk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/thales-theorem-by-jorge-c-ssio/sssss1pk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/thales-theorem-by-jorge-c-ssio/sssss1pk"/>
      <lastmod>2026-11-01T19:25:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/thales-theorem-by-jorge-c-ssio/sssss1pk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/thales-theorem-by-jorge-c-ssio/sssss1pk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/thales-theorem-by-jorge-c-ssio/sssss1pk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/thales-theorem-by-jorge-c-ssio/sssss1pk"/>
      <lastmod>2026-11-01T19:25:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-conic-sections/sssss1pz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-conic-sections/sssss1pz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-conic-sections/sssss1pz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-conic-sections/sssss1pz"/>
      <lastmod>2026-11-02T09:18:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-conic-sections/sssss1pz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-conic-sections/sssss1pz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-conic-sections/sssss1pz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-conic-sections/sssss1pz"/>
      <lastmod>2026-11-02T09:18:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bodmas-and-negative-numbers/sssss1p0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bodmas-and-negative-numbers/sssss1p0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bodmas-and-negative-numbers/sssss1p0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bodmas-and-negative-numbers/sssss1p0"/>
      <lastmod>2026-11-02T18:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bodmas-and-negative-numbers/sssss1p0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bodmas-and-negative-numbers/sssss1p0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bodmas-and-negative-numbers/sssss1p0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bodmas-and-negative-numbers/sssss1p0"/>
      <lastmod>2026-11-02T18:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/asa-triangle-congruence/sssss1pd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-triangle-congruence/sssss1pd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-triangle-congruence/sssss1pd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-triangle-congruence/sssss1pd"/>
      <lastmod>2026-11-01T23:26:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/asa-triangle-congruence/sssss1pd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-triangle-congruence/sssss1pd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-triangle-congruence/sssss1pd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-triangle-congruence/sssss1pd"/>
      <lastmod>2026-11-01T23:26:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simultaneous-linear-equations-graphs-plotted-using-user-input/sssss1pf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simultaneous-linear-equations-graphs-plotted-using-user-input/sssss1pf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simultaneous-linear-equations-graphs-plotted-using-user-input/sssss1pf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simultaneous-linear-equations-graphs-plotted-using-user-input/sssss1pf"/>
      <lastmod>2026-11-01T19:26:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simultaneous-linear-equations-graphs-plotted-using-user-input/sssss1pf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simultaneous-linear-equations-graphs-plotted-using-user-input/sssss1pf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simultaneous-linear-equations-graphs-plotted-using-user-input/sssss1pf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simultaneous-linear-equations-graphs-plotted-using-user-input/sssss1pf"/>
      <lastmod>2026-11-01T19:26:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-integers-by-celia-jimenez/sssss1p8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-integers-by-celia-jimenez/sssss1p8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-integers-by-celia-jimenez/sssss1p8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-integers-by-celia-jimenez/sssss1p8"/>
      <lastmod>2026-11-02T17:09:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-integers-by-celia-jimenez/sssss1p8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-integers-by-celia-jimenez/sssss1p8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-integers-by-celia-jimenez/sssss1p8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-integers-by-celia-jimenez/sssss1p8"/>
      <lastmod>2026-11-02T17:09:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/12-5-squash-a-parallelogram/sssss1pu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/12-5-squash-a-parallelogram/sssss1pu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/12-5-squash-a-parallelogram/sssss1pu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/12-5-squash-a-parallelogram/sssss1pu"/>
      <lastmod>2026-11-01T23:58:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/12-5-squash-a-parallelogram/sssss1pu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/12-5-squash-a-parallelogram/sssss1pu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/12-5-squash-a-parallelogram/sssss1pu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/12-5-squash-a-parallelogram/sssss1pu"/>
      <lastmod>2026-11-01T23:58:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/soh-cah-toa-for-angles/sssss1p5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/soh-cah-toa-for-angles/sssss1p5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/soh-cah-toa-for-angles/sssss1p5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/soh-cah-toa-for-angles/sssss1p5"/>
      <lastmod>2026-11-02T13:29:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/soh-cah-toa-for-angles/sssss1p5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/soh-cah-toa-for-angles/sssss1p5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/soh-cah-toa-for-angles/sssss1p5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/soh-cah-toa-for-angles/sssss1p5"/>
      <lastmod>2026-11-02T13:29:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-triangular-prism/sssss1pb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-triangular-prism/sssss1pb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-triangular-prism/sssss1pb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-triangular-prism/sssss1pb"/>
      <lastmod>2026-11-02T10:50:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-triangular-prism/sssss1pb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-triangular-prism/sssss1pb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-triangular-prism/sssss1pb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-triangular-prism/sssss1pb"/>
      <lastmod>2026-11-02T10:50:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/understanding-derivatives/sssss1p3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-derivatives/sssss1p3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-derivatives/sssss1p3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-derivatives/sssss1p3"/>
      <lastmod>2026-11-01T22:03:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/understanding-derivatives/sssss1p3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-derivatives/sssss1p3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-derivatives/sssss1p3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-derivatives/sssss1p3"/>
      <lastmod>2026-11-01T22:03:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/converting-types-of-fractions/sssss1pq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converting-types-of-fractions/sssss1pq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converting-types-of-fractions/sssss1pq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converting-types-of-fractions/sssss1pq"/>
      <lastmod>2026-11-02T17:09:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/converting-types-of-fractions/sssss1pq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converting-types-of-fractions/sssss1pq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converting-types-of-fractions/sssss1pq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converting-types-of-fractions/sssss1pq"/>
      <lastmod>2026-11-02T17:09:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-relation-between-inscribed-central-angles-tangents-and-cyclic-quad/sssss1p1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-relation-between-inscribed-central-angles-tangents-and-cyclic-quad/sssss1p1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-relation-between-inscribed-central-angles-tangents-and-cyclic-quad/sssss1p1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-relation-between-inscribed-central-angles-tangents-and-cyclic-quad/sssss1p1"/>
      <lastmod>2026-11-01T21:13:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-relation-between-inscribed-central-angles-tangents-and-cyclic-quad/sssss1p1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-relation-between-inscribed-central-angles-tangents-and-cyclic-quad/sssss1p1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-relation-between-inscribed-central-angles-tangents-and-cyclic-quad/sssss1p1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-relation-between-inscribed-central-angles-tangents-and-cyclic-quad/sssss1p1"/>
      <lastmod>2026-11-01T21:13:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copying-an-angle-geometric-construction/sssss1pm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copying-an-angle-geometric-construction/sssss1pm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copying-an-angle-geometric-construction/sssss1pm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copying-an-angle-geometric-construction/sssss1pm"/>
      <lastmod>2026-11-01T20:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copying-an-angle-geometric-construction/sssss1pm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copying-an-angle-geometric-construction/sssss1pm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copying-an-angle-geometric-construction/sssss1pm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copying-an-angle-geometric-construction/sssss1pm"/>
      <lastmod>2026-11-01T20:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-y-intercept-of-a-line/sssss1pj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-y-intercept-of-a-line/sssss1pj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-y-intercept-of-a-line/sssss1pj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-y-intercept-of-a-line/sssss1pj"/>
      <lastmod>2026-11-02T18:28:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-y-intercept-of-a-line/sssss1pj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-y-intercept-of-a-line/sssss1pj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-y-intercept-of-a-line/sssss1pj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-y-intercept-of-a-line/sssss1pj"/>
      <lastmod>2026-11-02T18:28:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-from-segment/sssss1pp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-from-segment/sssss1pp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-from-segment/sssss1pp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-from-segment/sssss1pp"/>
      <lastmod>2026-11-02T02:18:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-from-segment/sssss1pp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-from-segment/sssss1pp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-from-segment/sssss1pp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-from-segment/sssss1pp"/>
      <lastmod>2026-11-02T02:18:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-from-a-point-to-a-line/sssss1pw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-from-a-point-to-a-line/sssss1pw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-from-a-point-to-a-line/sssss1pw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-from-a-point-to-a-line/sssss1pw"/>
      <lastmod>2026-11-02T08:52:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-from-a-point-to-a-line/sssss1pw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-from-a-point-to-a-line/sssss1pw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-from-a-point-to-a-line/sssss1pw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-from-a-point-to-a-line/sssss1pw"/>
      <lastmod>2026-11-02T08:52:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-with-numbers-visualizing-set-operations-and-counting/sssss1p6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-with-numbers-visualizing-set-operations-and-counting/sssss1p6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-with-numbers-visualizing-set-operations-and-counting/sssss1p6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-with-numbers-visualizing-set-operations-and-counting/sssss1p6"/>
      <lastmod>2026-11-01T21:27:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-with-numbers-visualizing-set-operations-and-counting/sssss1p6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-with-numbers-visualizing-set-operations-and-counting/sssss1p6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-with-numbers-visualizing-set-operations-and-counting/sssss1p6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-with-numbers-visualizing-set-operations-and-counting/sssss1p6"/>
      <lastmod>2026-11-01T21:27:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-many-intersections-of-four-lines/sssss1pg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-many-intersections-of-four-lines/sssss1pg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-many-intersections-of-four-lines/sssss1pg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-many-intersections-of-four-lines/sssss1pg"/>
      <lastmod>2026-11-02T00:01:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-many-intersections-of-four-lines/sssss1pg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-many-intersections-of-four-lines/sssss1pg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-many-intersections-of-four-lines/sssss1pg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-many-intersections-of-four-lines/sssss1pg"/>
      <lastmod>2026-11-02T00:01:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temperature-variation-over-time-in-physics/sssss1p9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-variation-over-time-in-physics/sssss1p9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-variation-over-time-in-physics/sssss1p9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-variation-over-time-in-physics/sssss1p9"/>
      <lastmod>2026-11-01T21:35:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temperature-variation-over-time-in-physics/sssss1p9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-variation-over-time-in-physics/sssss1p9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-variation-over-time-in-physics/sssss1p9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-variation-over-time-in-physics/sssss1p9"/>
      <lastmod>2026-11-01T21:35:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-and-semicircle-construction/sssss1pe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-semicircle-construction/sssss1pe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-semicircle-construction/sssss1pe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-semicircle-construction/sssss1pe"/>
      <lastmod>2026-11-01T23:34:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-and-semicircle-construction/sssss1pe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-semicircle-construction/sssss1pe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-semicircle-construction/sssss1pe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-semicircle-construction/sssss1pe"/>
      <lastmod>2026-11-01T23:34:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/continuous-chapman-layer-algebraic/sssss1pv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuous-chapman-layer-algebraic/sssss1pv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuous-chapman-layer-algebraic/sssss1pv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuous-chapman-layer-algebraic/sssss1pv"/>
      <lastmod>2026-11-02T00:29:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/continuous-chapman-layer-algebraic/sssss1pv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuous-chapman-layer-algebraic/sssss1pv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuous-chapman-layer-algebraic/sssss1pv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuous-chapman-layer-algebraic/sssss1pv"/>
      <lastmod>2026-11-02T00:29:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-calculation-by-meera-lawrence/sssss1p4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-calculation-by-meera-lawrence/sssss1p4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-cone-volume-calculation-by-meera-lawrence/sssss1p4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-calculation-by-meera-lawrence/sssss1p4"/>
      <lastmod>2026-11-01T23:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-and-cone-volume-calculation-by-meera-lawrence/sssss1p4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-calculation-by-meera-lawrence/sssss1p4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-cone-volume-calculation-by-meera-lawrence/sssss1p4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-calculation-by-meera-lawrence/sssss1p4"/>
      <lastmod>2026-11-01T23:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compass-and-straightedge-example/sssss1pl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compass-and-straightedge-example/sssss1pl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compass-and-straightedge-example/sssss1pl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compass-and-straightedge-example/sssss1pl"/>
      <lastmod>2026-11-02T18:14:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compass-and-straightedge-example/sssss1pl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compass-and-straightedge-example/sssss1pl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compass-and-straightedge-example/sssss1pl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compass-and-straightedge-example/sssss1pl"/>
      <lastmod>2026-11-02T18:14:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-solutions-demo/sssss1py</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-solutions-demo/sssss1py"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-solutions-demo/sssss1py"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-solutions-demo/sssss1py"/>
      <lastmod>2026-11-02T02:20:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-solutions-demo/sssss1py</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-solutions-demo/sssss1py"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-solutions-demo/sssss1py"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-solutions-demo/sssss1py"/>
      <lastmod>2026-11-02T02:20:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylindrical-coordinates-3d-points-and-geometric-transformations/sssss1pa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-coordinates-3d-points-and-geometric-transformations/sssss1pa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-coordinates-3d-points-and-geometric-transformations/sssss1pa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-coordinates-3d-points-and-geometric-transformations/sssss1pa"/>
      <lastmod>2026-11-02T18:36:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylindrical-coordinates-3d-points-and-geometric-transformations/sssss1pa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-coordinates-3d-points-and-geometric-transformations/sssss1pa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-coordinates-3d-points-and-geometric-transformations/sssss1pa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-coordinates-3d-points-and-geometric-transformations/sssss1pa"/>
      <lastmod>2026-11-02T18:36:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-a-circle/sssss1pc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-a-circle/sssss1pc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-a-circle/sssss1pc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-a-circle/sssss1pc"/>
      <lastmod>2026-11-02T17:17:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-a-circle/sssss1pc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-a-circle/sssss1pc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-a-circle/sssss1pc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-a-circle/sssss1pc"/>
      <lastmod>2026-11-02T17:17:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shree-yanthra-geometric-construction/sssss1pr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shree-yanthra-geometric-construction/sssss1pr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shree-yanthra-geometric-construction/sssss1pr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shree-yanthra-geometric-construction/sssss1pr"/>
      <lastmod>2026-11-01T21:05:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shree-yanthra-geometric-construction/sssss1pr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shree-yanthra-geometric-construction/sssss1pr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shree-yanthra-geometric-construction/sssss1pr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shree-yanthra-geometric-construction/sssss1pr"/>
      <lastmod>2026-11-01T21:05:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-2-7-practice-creating-double-number-line-diagrams/sssss1ph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-2-7-practice-creating-double-number-line-diagrams/sssss1ph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-2-7-practice-creating-double-number-line-diagrams/sssss1ph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-2-7-practice-creating-double-number-line-diagrams/sssss1ph"/>
      <lastmod>2026-11-01T20:27:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-2-7-practice-creating-double-number-line-diagrams/sssss1ph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-2-7-practice-creating-double-number-line-diagrams/sssss1ph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-2-7-practice-creating-double-number-line-diagrams/sssss1ph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-2-7-practice-creating-double-number-line-diagrams/sssss1ph"/>
      <lastmod>2026-11-01T20:27:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-line/sssss1pt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-line/sssss1pt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-line/sssss1pt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-line/sssss1pt"/>
      <lastmod>2026-11-01T19:26:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-line/sssss1pt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-line/sssss1pt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-line/sssss1pt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-line/sssss1pt"/>
      <lastmod>2026-11-01T19:26:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-exponential-functions-1/sssss1px</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-1/sssss1px"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-exponential-functions-1/sssss1px"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-1/sssss1px"/>
      <lastmod>2026-11-01T19:11:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-exponential-functions-1/sssss1px</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-1/sssss1px"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-exponential-functions-1/sssss1px"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-1/sssss1px"/>
      <lastmod>2026-11-01T19:11:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism-by-daryl-cox/sssss1pi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism-by-daryl-cox/sssss1pi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-for-a-rectangular-prism-by-daryl-cox/sssss1pi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism-by-daryl-cox/sssss1pi"/>
      <lastmod>2026-11-02T18:34:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-for-a-rectangular-prism-by-daryl-cox/sssss1pi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism-by-daryl-cox/sssss1pi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-for-a-rectangular-prism-by-daryl-cox/sssss1pi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism-by-daryl-cox/sssss1pi"/>
      <lastmod>2026-11-02T18:34:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/synergistic-cartesian-prime-integers-v1-1/sssss1po</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/synergistic-cartesian-prime-integers-v1-1/sssss1po"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/synergistic-cartesian-prime-integers-v1-1/sssss1po"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/synergistic-cartesian-prime-integers-v1-1/sssss1po"/>
      <lastmod>2026-11-02T17:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/synergistic-cartesian-prime-integers-v1-1/sssss1po</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/synergistic-cartesian-prime-integers-v1-1/sssss1po"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/synergistic-cartesian-prime-integers-v1-1/sssss1po"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/synergistic-cartesian-prime-integers-v1-1/sssss1po"/>
      <lastmod>2026-11-02T17:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dihedral-angles/sssss1ws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dihedral-angles/sssss1ws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dihedral-angles/sssss1ws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dihedral-angles/sssss1ws"/>
      <lastmod>2026-11-02T17:00:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dihedral-angles/sssss1ws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dihedral-angles/sssss1ws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dihedral-angles/sssss1ws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dihedral-angles/sssss1ws"/>
      <lastmod>2026-11-02T17:00:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-and-median-line-test/sssss1w7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-median-line-test/sssss1w7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-and-median-line-test/sssss1w7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-median-line-test/sssss1w7"/>
      <lastmod>2026-11-02T13:57:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-and-median-line-test/sssss1w7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-median-line-test/sssss1w7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-and-median-line-test/sssss1w7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-median-line-test/sssss1w7"/>
      <lastmod>2026-11-02T13:57:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-perpendicular-line-segments/sssss1wn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-perpendicular-line-segments/sssss1wn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-perpendicular-line-segments/sssss1wn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-perpendicular-line-segments/sssss1wn"/>
      <lastmod>2026-11-02T00:52:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-perpendicular-line-segments/sssss1wn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-perpendicular-line-segments/sssss1wn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-perpendicular-line-segments/sssss1wn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-perpendicular-line-segments/sssss1wn"/>
      <lastmod>2026-11-02T00:52:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mod-7-lab/sssss1w2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mod-7-lab/sssss1w2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mod-7-lab/sssss1w2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mod-7-lab/sssss1w2"/>
      <lastmod>2026-11-01T19:23:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mod-7-lab/sssss1w2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mod-7-lab/sssss1w2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mod-7-lab/sssss1w2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mod-7-lab/sssss1w2"/>
      <lastmod>2026-11-01T19:23:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-a-function-with-slope-value-and-tangent-line/sssss1wk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-a-function-with-slope-value-and-tangent-line/sssss1wk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-a-function-with-slope-value-and-tangent-line/sssss1wk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-a-function-with-slope-value-and-tangent-line/sssss1wk"/>
      <lastmod>2026-11-02T12:42:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-a-function-with-slope-value-and-tangent-line/sssss1wk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-a-function-with-slope-value-and-tangent-line/sssss1wk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-a-function-with-slope-value-and-tangent-line/sssss1wk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-a-function-with-slope-value-and-tangent-line/sssss1wk"/>
      <lastmod>2026-11-02T12:42:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisector-of-a-line-segment-lr7-02-ip1/sssss1wz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-of-a-line-segment-lr7-02-ip1/sssss1wz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-of-a-line-segment-lr7-02-ip1/sssss1wz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-of-a-line-segment-lr7-02-ip1/sssss1wz"/>
      <lastmod>2026-11-01T21:54:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisector-of-a-line-segment-lr7-02-ip1/sssss1wz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-of-a-line-segment-lr7-02-ip1/sssss1wz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-of-a-line-segment-lr7-02-ip1/sssss1wz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-of-a-line-segment-lr7-02-ip1/sssss1wz"/>
      <lastmod>2026-11-01T21:54:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-hyperbola/sssss1w0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-hyperbola/sssss1w0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-hyperbola/sssss1w0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-hyperbola/sssss1w0"/>
      <lastmod>2026-11-02T08:55:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-hyperbola/sssss1w0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-hyperbola/sssss1w0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-hyperbola/sssss1w0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-hyperbola/sssss1w0"/>
      <lastmod>2026-11-02T08:55:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-by-folding-by-katey/sssss1wd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-by-folding-by-katey/sssss1wd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-by-folding-by-katey/sssss1wd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-by-folding-by-katey/sssss1wd"/>
      <lastmod>2026-11-02T18:53:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-by-folding-by-katey/sssss1wd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-by-folding-by-katey/sssss1wd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-by-folding-by-katey/sssss1wd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-by-folding-by-katey/sssss1wd"/>
      <lastmod>2026-11-02T18:53:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-madelgado489/sssss1wf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-madelgado489/sssss1wf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-demonstration-by-madelgado489/sssss1wf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-madelgado489/sssss1wf"/>
      <lastmod>2026-11-02T17:44:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-demonstration-by-madelgado489/sssss1wf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-madelgado489/sssss1wf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-demonstration-by-madelgado489/sssss1wf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-madelgado489/sssss1wf"/>
      <lastmod>2026-11-02T17:44:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-transformations-by-mmarkus/sssss1w8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-transformations-by-mmarkus/sssss1w8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-transformations-by-mmarkus/sssss1w8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-transformations-by-mmarkus/sssss1w8"/>
      <lastmod>2026-11-01T23:15:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-transformations-by-mmarkus/sssss1w8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-transformations-by-mmarkus/sssss1w8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-transformations-by-mmarkus/sssss1w8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-transformations-by-mmarkus/sssss1w8"/>
      <lastmod>2026-11-01T23:15:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conics-tangent-circles-and-line-construction/sssss1wu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conics-tangent-circles-and-line-construction/sssss1wu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conics-tangent-circles-and-line-construction/sssss1wu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conics-tangent-circles-and-line-construction/sssss1wu"/>
      <lastmod>2026-11-02T08:56:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conics-tangent-circles-and-line-construction/sssss1wu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conics-tangent-circles-and-line-construction/sssss1wu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conics-tangent-circles-and-line-construction/sssss1wu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conics-tangent-circles-and-line-construction/sssss1wu"/>
      <lastmod>2026-11-02T08:56:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-net-of-a-square-pyramid-by-danielle/sssss1w5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-net-of-a-square-pyramid-by-danielle/sssss1w5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-net-of-a-square-pyramid-by-danielle/sssss1w5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-net-of-a-square-pyramid-by-danielle/sssss1w5"/>
      <lastmod>2026-11-02T00:08:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-net-of-a-square-pyramid-by-danielle/sssss1w5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-net-of-a-square-pyramid-by-danielle/sssss1w5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-net-of-a-square-pyramid-by-danielle/sssss1w5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-net-of-a-square-pyramid-by-danielle/sssss1w5"/>
      <lastmod>2026-11-02T00:08:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-cylinder/sssss1wb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cylinder/sssss1wb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cylinder/sssss1wb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cylinder/sssss1wb"/>
      <lastmod>2026-11-02T17:17:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-cylinder/sssss1wb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cylinder/sssss1wb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cylinder/sssss1wb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cylinder/sssss1wb"/>
      <lastmod>2026-11-02T17:17:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelograms-investigation-by-blaine-lakin/sssss1w3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-investigation-by-blaine-lakin/sssss1w3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-investigation-by-blaine-lakin/sssss1w3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-investigation-by-blaine-lakin/sssss1w3"/>
      <lastmod>2026-11-02T17:51:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelograms-investigation-by-blaine-lakin/sssss1w3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-investigation-by-blaine-lakin/sssss1w3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-investigation-by-blaine-lakin/sssss1w3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-investigation-by-blaine-lakin/sssss1w3"/>
      <lastmod>2026-11-02T17:51:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/imaginary-component-of-logarithm-of-a-complex-number/sssss1wq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/imaginary-component-of-logarithm-of-a-complex-number/sssss1wq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/imaginary-component-of-logarithm-of-a-complex-number/sssss1wq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/imaginary-component-of-logarithm-of-a-complex-number/sssss1wq"/>
      <lastmod>2026-11-01T23:33:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/imaginary-component-of-logarithm-of-a-complex-number/sssss1wq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/imaginary-component-of-logarithm-of-a-complex-number/sssss1wq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/imaginary-component-of-logarithm-of-a-complex-number/sssss1wq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/imaginary-component-of-logarithm-of-a-complex-number/sssss1wq"/>
      <lastmod>2026-11-01T23:33:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-demo-by-cathay/sssss1w1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-by-cathay/sssss1w1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-demo-by-cathay/sssss1w1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-by-cathay/sssss1w1"/>
      <lastmod>2026-11-01T21:30:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-demo-by-cathay/sssss1w1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-by-cathay/sssss1w1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-demo-by-cathay/sssss1w1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-by-cathay/sssss1w1"/>
      <lastmod>2026-11-01T21:30:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chordal-divisions-demo/sssss1wm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chordal-divisions-demo/sssss1wm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chordal-divisions-demo/sssss1wm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chordal-divisions-demo/sssss1wm"/>
      <lastmod>2026-11-02T17:39:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chordal-divisions-demo/sssss1wm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chordal-divisions-demo/sssss1wm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chordal-divisions-demo/sssss1wm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chordal-divisions-demo/sssss1wm"/>
      <lastmod>2026-11-02T17:39:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/radian-exploration-45-degree-increments/sssss1wj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radian-exploration-45-degree-increments/sssss1wj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radian-exploration-45-degree-increments/sssss1wj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radian-exploration-45-degree-increments/sssss1wj"/>
      <lastmod>2026-11-02T17:47:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/radian-exploration-45-degree-increments/sssss1wj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radian-exploration-45-degree-increments/sssss1wj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radian-exploration-45-degree-increments/sssss1wj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radian-exploration-45-degree-increments/sssss1wj"/>
      <lastmod>2026-11-02T17:47:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/confidence-interval-for-house-paint/sssss1wp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-for-house-paint/sssss1wp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-for-house-paint/sssss1wp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-for-house-paint/sssss1wp"/>
      <lastmod>2026-11-01T21:20:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/confidence-interval-for-house-paint/sssss1wp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-for-house-paint/sssss1wp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-for-house-paint/sssss1wp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-for-house-paint/sssss1wp"/>
      <lastmod>2026-11-01T21:20:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/check-is-it-an-angle-bisector/sssss1ww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-is-it-an-angle-bisector/sssss1ww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-is-it-an-angle-bisector/sssss1ww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-is-it-an-angle-bisector/sssss1ww"/>
      <lastmod>2026-11-01T21:17:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/check-is-it-an-angle-bisector/sssss1ww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-is-it-an-angle-bisector/sssss1ww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-is-it-an-angle-bisector/sssss1ww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-is-it-an-angle-bisector/sssss1ww"/>
      <lastmod>2026-11-01T21:17:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bound-vectors-demo/sssss1w6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bound-vectors-demo/sssss1w6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bound-vectors-demo/sssss1w6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bound-vectors-demo/sssss1w6"/>
      <lastmod>2026-11-02T02:39:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bound-vectors-demo/sssss1w6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bound-vectors-demo/sssss1w6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bound-vectors-demo/sssss1w6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bound-vectors-demo/sssss1w6"/>
      <lastmod>2026-11-02T02:39:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/u1d7-symmetry-regular-polygons/sssss1wg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/u1d7-symmetry-regular-polygons/sssss1wg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/u1d7-symmetry-regular-polygons/sssss1wg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/u1d7-symmetry-regular-polygons/sssss1wg"/>
      <lastmod>2026-11-02T00:20:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/u1d7-symmetry-regular-polygons/sssss1wg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/u1d7-symmetry-regular-polygons/sssss1wg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/u1d7-symmetry-regular-polygons/sssss1wg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/u1d7-symmetry-regular-polygons/sssss1wg"/>
      <lastmod>2026-11-02T00:20:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-properties-investigation/sssss1w9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-properties-investigation/sssss1w9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-properties-investigation/sssss1w9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-properties-investigation/sssss1w9"/>
      <lastmod>2026-11-01T23:47:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-properties-investigation/sssss1w9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-properties-investigation/sssss1w9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-properties-investigation/sssss1w9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-properties-investigation/sssss1w9"/>
      <lastmod>2026-11-01T23:47:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/systems-of-linear-equations/sssss1we</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/systems-of-linear-equations/sssss1we"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/systems-of-linear-equations/sssss1we"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/systems-of-linear-equations/sssss1we"/>
      <lastmod>2026-11-02T18:55:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/systems-of-linear-equations/sssss1we</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/systems-of-linear-equations/sssss1we"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/systems-of-linear-equations/sssss1we"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/systems-of-linear-equations/sssss1we"/>
      <lastmod>2026-11-02T18:55:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-geometric-construction/sssss1wv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-geometric-construction/sssss1wv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-geometric-construction/sssss1wv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-geometric-construction/sssss1wv"/>
      <lastmod>2026-11-02T11:51:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-geometric-construction/sssss1wv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-geometric-construction/sssss1wv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-geometric-construction/sssss1wv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-geometric-construction/sssss1wv"/>
      <lastmod>2026-11-02T11:51:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inequality-demonstration/sssss1w4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequality-demonstration/sssss1w4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequality-demonstration/sssss1w4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequality-demonstration/sssss1w4"/>
      <lastmod>2026-11-01T19:21:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inequality-demonstration/sssss1w4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequality-demonstration/sssss1w4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequality-demonstration/sssss1w4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequality-demonstration/sssss1w4"/>
      <lastmod>2026-11-01T19:21:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logo-dia-geometric-construction/sssss1wl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-dia-geometric-construction/sssss1wl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-dia-geometric-construction/sssss1wl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-dia-geometric-construction/sssss1wl"/>
      <lastmod>2026-11-01T21:53:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logo-dia-geometric-construction/sssss1wl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-dia-geometric-construction/sssss1wl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-dia-geometric-construction/sssss1wl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-dia-geometric-construction/sssss1wl"/>
      <lastmod>2026-11-01T21:53:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equilateral-and-isosceles-triangles/sssss1wy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-and-isosceles-triangles/sssss1wy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-and-isosceles-triangles/sssss1wy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-and-isosceles-triangles/sssss1wy"/>
      <lastmod>2026-11-02T17:57:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equilateral-and-isosceles-triangles/sssss1wy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-and-isosceles-triangles/sssss1wy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-and-isosceles-triangles/sssss1wy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-and-isosceles-triangles/sssss1wy"/>
      <lastmod>2026-11-02T17:57:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-concyclic-relationship-between-two-circles-and-their-com/sssss1wa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-concyclic-relationship-between-two-circles-and-their-com/sssss1wa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-concyclic-relationship-between-two-circles-and-their-com/sssss1wa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-concyclic-relationship-between-two-circles-and-their-com/sssss1wa"/>
      <lastmod>2026-11-02T18:12:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-concyclic-relationship-between-two-circles-and-their-com/sssss1wa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-concyclic-relationship-between-two-circles-and-their-com/sssss1wa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-concyclic-relationship-between-two-circles-and-their-com/sssss1wa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-concyclic-relationship-between-two-circles-and-their-com/sssss1wa"/>
      <lastmod>2026-11-02T18:12:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-transformations-to-show-congruence/sssss1wc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-transformations-to-show-congruence/sssss1wc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-transformations-to-show-congruence/sssss1wc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-transformations-to-show-congruence/sssss1wc"/>
      <lastmod>2026-11-02T00:15:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-transformations-to-show-congruence/sssss1wc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-transformations-to-show-congruence/sssss1wc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-transformations-to-show-congruence/sssss1wc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-transformations-to-show-congruence/sssss1wc"/>
      <lastmod>2026-11-02T00:15:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-number-for-10-points/sssss1wr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-number-for-10-points/sssss1wr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-number-for-10-points/sssss1wr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-number-for-10-points/sssss1wr"/>
      <lastmod>2026-11-01T21:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-number-for-10-points/sssss1wr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-number-for-10-points/sssss1wr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-number-for-10-points/sssss1wr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-number-for-10-points/sssss1wr"/>
      <lastmod>2026-11-01T21:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilaterals-and-their-sides-and-angles/sssss1wh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilaterals-and-their-sides-and-angles/sssss1wh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilaterals-and-their-sides-and-angles/sssss1wh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilaterals-and-their-sides-and-angles/sssss1wh"/>
      <lastmod>2026-11-02T13:37:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilaterals-and-their-sides-and-angles/sssss1wh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilaterals-and-their-sides-and-angles/sssss1wh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilaterals-and-their-sides-and-angles/sssss1wh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilaterals-and-their-sides-and-angles/sssss1wh"/>
      <lastmod>2026-11-02T13:37:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-fractions-with-lines-and-circles/sssss1wt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-lines-and-circles/sssss1wt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-with-lines-and-circles/sssss1wt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-lines-and-circles/sssss1wt"/>
      <lastmod>2026-11-02T00:22:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-fractions-with-lines-and-circles/sssss1wt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-lines-and-circles/sssss1wt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-with-lines-and-circles/sssss1wt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-lines-and-circles/sssss1wt"/>
      <lastmod>2026-11-02T00:22:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-by-corybenson/sssss1wx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-corybenson/sssss1wx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-corybenson/sssss1wx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-corybenson/sssss1wx"/>
      <lastmod>2026-11-02T16:48:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-by-corybenson/sssss1wx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-corybenson/sssss1wx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-corybenson/sssss1wx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-corybenson/sssss1wx"/>
      <lastmod>2026-11-02T16:48:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quirinus-puzzle/sssss1wi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quirinus-puzzle/sssss1wi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quirinus-puzzle/sssss1wi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quirinus-puzzle/sssss1wi"/>
      <lastmod>2026-11-02T16:48:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quirinus-puzzle/sssss1wi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quirinus-puzzle/sssss1wi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quirinus-puzzle/sssss1wi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quirinus-puzzle/sssss1wi"/>
      <lastmod>2026-11-02T16:48:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-function-graph-and-limits/sssss1wo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-graph-and-limits/sssss1wo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-graph-and-limits/sssss1wo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-graph-and-limits/sssss1wo"/>
      <lastmod>2026-11-02T06:45:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-function-graph-and-limits/sssss1wo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-graph-and-limits/sssss1wo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-graph-and-limits/sssss1wo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-graph-and-limits/sssss1wo"/>
      <lastmod>2026-11-02T06:45:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gal-3-circle-chain-geometry-demo/sssss16s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gal-3-circle-chain-geometry-demo/sssss16s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gal-3-circle-chain-geometry-demo/sssss16s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gal-3-circle-chain-geometry-demo/sssss16s"/>
      <lastmod>2026-11-01T21:38:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gal-3-circle-chain-geometry-demo/sssss16s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gal-3-circle-chain-geometry-demo/sssss16s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gal-3-circle-chain-geometry-demo/sssss16s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gal-3-circle-chain-geometry-demo/sssss16s"/>
      <lastmod>2026-11-01T21:38:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-data-representation-practice/sssss167</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-data-representation-practice/sssss167"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-data-representation-practice/sssss167"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-data-representation-practice/sssss167"/>
      <lastmod>2026-11-01T22:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-data-representation-practice/sssss167</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-data-representation-practice/sssss167"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-data-representation-practice/sssss167"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-data-representation-practice/sssss167"/>
      <lastmod>2026-11-01T22:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-the-orthocenter-of-a-triangle-by-emily-crum/sssss16n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-the-orthocenter-of-a-triangle-by-emily-crum/sssss16n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-the-orthocenter-of-a-triangle-by-emily-crum/sssss16n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-the-orthocenter-of-a-triangle-by-emily-crum/sssss16n"/>
      <lastmod>2026-11-02T13:13:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-the-orthocenter-of-a-triangle-by-emily-crum/sssss16n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-the-orthocenter-of-a-triangle-by-emily-crum/sssss16n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-the-orthocenter-of-a-triangle-by-emily-crum/sssss16n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-the-orthocenter-of-a-triangle-by-emily-crum/sssss16n"/>
      <lastmod>2026-11-02T13:13:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-points-of-implicit-curves-scanning-method/sssss162</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-points-of-implicit-curves-scanning-method/sssss162"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-points-of-implicit-curves-scanning-method/sssss162"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-points-of-implicit-curves-scanning-method/sssss162"/>
      <lastmod>2026-11-02T12:41:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-points-of-implicit-curves-scanning-method/sssss162</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-points-of-implicit-curves-scanning-method/sssss162"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-points-of-implicit-curves-scanning-method/sssss162"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-points-of-implicit-curves-scanning-method/sssss162"/>
      <lastmod>2026-11-02T12:41:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-sine-and-cosine-functions/sssss16k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-sine-and-cosine-functions/sssss16k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-sine-and-cosine-functions/sssss16k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-sine-and-cosine-functions/sssss16k"/>
      <lastmod>2026-11-02T18:53:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-sine-and-cosine-functions/sssss16k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-sine-and-cosine-functions/sssss16k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-sine-and-cosine-functions/sssss16k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-sine-and-cosine-functions/sssss16k"/>
      <lastmod>2026-11-02T18:53:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identify-translation/sssss16z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-translation/sssss16z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-translation/sssss16z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-translation/sssss16z"/>
      <lastmod>2026-11-02T16:47:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identify-translation/sssss16z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-translation/sssss16z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-translation/sssss16z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-translation/sssss16z"/>
      <lastmod>2026-11-02T16:47:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similarity-transformation-and-triangles/sssss160</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-triangles/sssss160"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-and-triangles/sssss160"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-triangles/sssss160"/>
      <lastmod>2026-11-02T00:37:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similarity-transformation-and-triangles/sssss160</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-triangles/sssss160"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-and-triangles/sssss160"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-triangles/sssss160"/>
      <lastmod>2026-11-02T00:37:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/direction-fields-and-solution-curves/sssss16d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direction-fields-and-solution-curves/sssss16d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direction-fields-and-solution-curves/sssss16d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direction-fields-and-solution-curves/sssss16d"/>
      <lastmod>2026-11-02T02:29:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/direction-fields-and-solution-curves/sssss16d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direction-fields-and-solution-curves/sssss16d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direction-fields-and-solution-curves/sssss16d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direction-fields-and-solution-curves/sssss16d"/>
      <lastmod>2026-11-02T02:29:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-octagon-problem-dynamic-demo/sssss16f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-octagon-problem-dynamic-demo/sssss16f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-octagon-problem-dynamic-demo/sssss16f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-octagon-problem-dynamic-demo/sssss16f"/>
      <lastmod>2026-11-02T17:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-octagon-problem-dynamic-demo/sssss16f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-octagon-problem-dynamic-demo/sssss16f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-octagon-problem-dynamic-demo/sssss16f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-octagon-problem-dynamic-demo/sssss16f"/>
      <lastmod>2026-11-02T17:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/facial-line-symmetry-mirror-transformations-and-geometric-construction/sssss168</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/facial-line-symmetry-mirror-transformations-and-geometric-construction/sssss168"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/facial-line-symmetry-mirror-transformations-and-geometric-construction/sssss168"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/facial-line-symmetry-mirror-transformations-and-geometric-construction/sssss168"/>
      <lastmod>2026-11-02T03:00:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/facial-line-symmetry-mirror-transformations-and-geometric-construction/sssss168</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/facial-line-symmetry-mirror-transformations-and-geometric-construction/sssss168"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/facial-line-symmetry-mirror-transformations-and-geometric-construction/sssss168"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/facial-line-symmetry-mirror-transformations-and-geometric-construction/sssss168"/>
      <lastmod>2026-11-02T03:00:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-two-planes-dihedral-angle-dynamic-demo/sssss16u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-dihedral-angle-dynamic-demo/sssss16u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-dihedral-angle-dynamic-demo/sssss16u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-dihedral-angle-dynamic-demo/sssss16u"/>
      <lastmod>2026-11-02T10:50:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-two-planes-dihedral-angle-dynamic-demo/sssss16u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-dihedral-angle-dynamic-demo/sssss16u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-dihedral-angle-dynamic-demo/sssss16u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-dihedral-angle-dynamic-demo/sssss16u"/>
      <lastmod>2026-11-02T10:50:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-exploration/sssss165</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-exploration/sssss165"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-exploration/sssss165"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-exploration/sssss165"/>
      <lastmod>2026-11-01T19:12:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-exploration/sssss165</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-exploration/sssss165"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-exploration/sssss165"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-exploration/sssss165"/>
      <lastmod>2026-11-01T19:12:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-demonstration-in-right-triangles/sssss16b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demonstration-in-right-triangles/sssss16b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demonstration-in-right-triangles/sssss16b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demonstration-in-right-triangles/sssss16b"/>
      <lastmod>2026-11-02T16:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-demonstration-in-right-triangles/sssss16b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demonstration-in-right-triangles/sssss16b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demonstration-in-right-triangles/sssss16b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demonstration-in-right-triangles/sssss16b"/>
      <lastmod>2026-11-02T16:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-complex-numbers-on-the-complex-plane/sssss163</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-complex-numbers-on-the-complex-plane/sssss163"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-complex-numbers-on-the-complex-plane/sssss163"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-complex-numbers-on-the-complex-plane/sssss163"/>
      <lastmod>2026-11-02T00:03:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-complex-numbers-on-the-complex-plane/sssss163</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-complex-numbers-on-the-complex-plane/sssss163"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-complex-numbers-on-the-complex-plane/sssss163"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-complex-numbers-on-the-complex-plane/sssss163"/>
      <lastmod>2026-11-02T00:03:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-inequality-building-a-triangle/sssss16q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-inequality-building-a-triangle/sssss16q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-inequality-building-a-triangle/sssss16q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-inequality-building-a-triangle/sssss16q"/>
      <lastmod>2026-11-01T23:12:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-inequality-building-a-triangle/sssss16q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-inequality-building-a-triangle/sssss16q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-inequality-building-a-triangle/sssss16q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-inequality-building-a-triangle/sssss16q"/>
      <lastmod>2026-11-01T23:12:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-without-words-by-steve-phelps-2/sssss161</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-by-steve-phelps-2/sssss161"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-by-steve-phelps-2/sssss161"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-by-steve-phelps-2/sssss161"/>
      <lastmod>2026-11-02T02:25:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-without-words-by-steve-phelps-2/sssss161</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-by-steve-phelps-2/sssss161"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-by-steve-phelps-2/sssss161"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-by-steve-phelps-2/sssss161"/>
      <lastmod>2026-11-02T02:25:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-by-michelle/sssss16m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-by-michelle/sssss16m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-by-michelle/sssss16m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-by-michelle/sssss16m"/>
      <lastmod>2026-11-02T18:35:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-by-michelle/sssss16m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-by-michelle/sssss16m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-by-michelle/sssss16m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-by-michelle/sssss16m"/>
      <lastmod>2026-11-02T18:35:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-c-0/sssss16j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-c-0/sssss16j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-c-0/sssss16j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-c-0/sssss16j"/>
      <lastmod>2026-11-01T21:11:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-c-0/sssss16j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-c-0/sssss16j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-c-0/sssss16j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-c-0/sssss16j"/>
      <lastmod>2026-11-01T21:11:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-subtraction/sssss16p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction/sssss16p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction/sssss16p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction/sssss16p"/>
      <lastmod>2026-11-01T23:39:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-subtraction/sssss16p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction/sssss16p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction/sssss16p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction/sssss16p"/>
      <lastmod>2026-11-01T23:39:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p6-symmetry-problem-2-horizontal-symmetry-axis/sssss16w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p6-symmetry-problem-2-horizontal-symmetry-axis/sssss16w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p6-symmetry-problem-2-horizontal-symmetry-axis/sssss16w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p6-symmetry-problem-2-horizontal-symmetry-axis/sssss16w"/>
      <lastmod>2026-11-01T20:46:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p6-symmetry-problem-2-horizontal-symmetry-axis/sssss16w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p6-symmetry-problem-2-horizontal-symmetry-axis/sssss16w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p6-symmetry-problem-2-horizontal-symmetry-axis/sssss16w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p6-symmetry-problem-2-horizontal-symmetry-axis/sssss16w"/>
      <lastmod>2026-11-01T20:46:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constant-translation-of-parallel-lines-by-philmacdivitt/sssss166</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constant-translation-of-parallel-lines-by-philmacdivitt/sssss166"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constant-translation-of-parallel-lines-by-philmacdivitt/sssss166"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constant-translation-of-parallel-lines-by-philmacdivitt/sssss166"/>
      <lastmod>2026-11-02T17:00:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constant-translation-of-parallel-lines-by-philmacdivitt/sssss166</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constant-translation-of-parallel-lines-by-philmacdivitt/sssss166"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constant-translation-of-parallel-lines-by-philmacdivitt/sssss166"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constant-translation-of-parallel-lines-by-philmacdivitt/sssss166"/>
      <lastmod>2026-11-02T17:00:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebra-2-exponents-roots-logarithms-assessment/sssss16g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-exponents-roots-logarithms-assessment/sssss16g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-exponents-roots-logarithms-assessment/sssss16g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-exponents-roots-logarithms-assessment/sssss16g"/>
      <lastmod>2026-11-02T02:31:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebra-2-exponents-roots-logarithms-assessment/sssss16g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-exponents-roots-logarithms-assessment/sssss16g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-exponents-roots-logarithms-assessment/sssss16g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-exponents-roots-logarithms-assessment/sssss16g"/>
      <lastmod>2026-11-02T02:31:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-nets-worksheet/sssss169</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-nets-worksheet/sssss169"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-nets-worksheet/sssss169"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-nets-worksheet/sssss169"/>
      <lastmod>2026-11-02T15:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-nets-worksheet/sssss169</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-nets-worksheet/sssss169"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-nets-worksheet/sssss169"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-nets-worksheet/sssss169"/>
      <lastmod>2026-11-02T15:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rainbow-snake/sssss16e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-snake/sssss16e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-snake/sssss16e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-snake/sssss16e"/>
      <lastmod>2026-11-02T00:04:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rainbow-snake/sssss16e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-snake/sssss16e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-snake/sssss16e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-snake/sssss16e"/>
      <lastmod>2026-11-02T00:04:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruence-of-larger-figures/sssss16v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-of-larger-figures/sssss16v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-of-larger-figures/sssss16v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-of-larger-figures/sssss16v"/>
      <lastmod>2026-11-01T23:44:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruence-of-larger-figures/sssss16v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-of-larger-figures/sssss16v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-of-larger-figures/sssss16v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-of-larger-figures/sssss16v"/>
      <lastmod>2026-11-01T23:44:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unmessupable-rhombus-dynamic-geometry-construction/sssss164</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unmessupable-rhombus-dynamic-geometry-construction/sssss164"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unmessupable-rhombus-dynamic-geometry-construction/sssss164"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unmessupable-rhombus-dynamic-geometry-construction/sssss164"/>
      <lastmod>2026-11-02T00:11:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unmessupable-rhombus-dynamic-geometry-construction/sssss164</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unmessupable-rhombus-dynamic-geometry-construction/sssss164"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unmessupable-rhombus-dynamic-geometry-construction/sssss164"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unmessupable-rhombus-dynamic-geometry-construction/sssss164"/>
      <lastmod>2026-11-02T00:11:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discount-calculation-and-geometric-demonstration/sssss16l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discount-calculation-and-geometric-demonstration/sssss16l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discount-calculation-and-geometric-demonstration/sssss16l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discount-calculation-and-geometric-demonstration/sssss16l"/>
      <lastmod>2026-11-01T22:02:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discount-calculation-and-geometric-demonstration/sssss16l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discount-calculation-and-geometric-demonstration/sssss16l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discount-calculation-and-geometric-demonstration/sssss16l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discount-calculation-and-geometric-demonstration/sssss16l"/>
      <lastmod>2026-11-01T22:02:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planes-in-space-by-17zhangw/sssss16y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-in-space-by-17zhangw/sssss16y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-in-space-by-17zhangw/sssss16y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-in-space-by-17zhangw/sssss16y"/>
      <lastmod>2026-11-02T18:15:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planes-in-space-by-17zhangw/sssss16y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-in-space-by-17zhangw/sssss16y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-in-space-by-17zhangw/sssss16y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-in-space-by-17zhangw/sssss16y"/>
      <lastmod>2026-11-02T18:15:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cone-by-k-goodwin/sssss16a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone-by-k-goodwin/sssss16a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone-by-k-goodwin/sssss16a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone-by-k-goodwin/sssss16a"/>
      <lastmod>2026-11-02T17:08:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cone-by-k-goodwin/sssss16a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone-by-k-goodwin/sssss16a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone-by-k-goodwin/sssss16a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone-by-k-goodwin/sssss16a"/>
      <lastmod>2026-11-02T17:08:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-to-rectangle/sssss16c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-to-rectangle/sssss16c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-to-rectangle/sssss16c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-to-rectangle/sssss16c"/>
      <lastmod>2026-11-01T21:24:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-to-rectangle/sssss16c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-to-rectangle/sssss16c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-to-rectangle/sssss16c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-to-rectangle/sssss16c"/>
      <lastmod>2026-11-01T21:24:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangle-ratios/sssss16r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-ratios/sssss16r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-ratios/sssss16r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-ratios/sssss16r"/>
      <lastmod>2026-11-02T18:48:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangle-ratios/sssss16r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-ratios/sssss16r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-ratios/sssss16r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-ratios/sssss16r"/>
      <lastmod>2026-11-02T18:48:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-construction-of-similar-triangles-with-symmetry/sssss16h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-similar-triangles-with-symmetry/sssss16h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-construction-of-similar-triangles-with-symmetry/sssss16h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-similar-triangles-with-symmetry/sssss16h"/>
      <lastmod>2026-11-02T09:58:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-construction-of-similar-triangles-with-symmetry/sssss16h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-similar-triangles-with-symmetry/sssss16h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-construction-of-similar-triangles-with-symmetry/sssss16h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-similar-triangles-with-symmetry/sssss16h"/>
      <lastmod>2026-11-02T09:58:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-an-ellipse/sssss16t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-an-ellipse/sssss16t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-an-ellipse/sssss16t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-an-ellipse/sssss16t"/>
      <lastmod>2026-11-02T13:06:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-an-ellipse/sssss16t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-an-ellipse/sssss16t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-an-ellipse/sssss16t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-an-ellipse/sssss16t"/>
      <lastmod>2026-11-02T13:06:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/1-1-example-1-exploring-ratio-relationships-in-polygons-with-differential-calcu/sssss16x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/1-1-example-1-exploring-ratio-relationships-in-polygons-with-differential-calcu/sssss16x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/1-1-example-1-exploring-ratio-relationships-in-polygons-with-differential-calcu/sssss16x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/1-1-example-1-exploring-ratio-relationships-in-polygons-with-differential-calcu/sssss16x"/>
      <lastmod>2026-11-01T19:23:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/1-1-example-1-exploring-ratio-relationships-in-polygons-with-differential-calcu/sssss16x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/1-1-example-1-exploring-ratio-relationships-in-polygons-with-differential-calcu/sssss16x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/1-1-example-1-exploring-ratio-relationships-in-polygons-with-differential-calcu/sssss16x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/1-1-example-1-exploring-ratio-relationships-in-polygons-with-differential-calcu/sssss16x"/>
      <lastmod>2026-11-01T19:23:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-and-integral-demonstration/sssss16i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-integral-demonstration/sssss16i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-integral-demonstration/sssss16i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-integral-demonstration/sssss16i"/>
      <lastmod>2026-11-02T16:50:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-and-integral-demonstration/sssss16i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-integral-demonstration/sssss16i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-integral-demonstration/sssss16i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-integral-demonstration/sssss16i"/>
      <lastmod>2026-11-02T16:50:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scale-factor-fraction-demo/sssss16o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scale-factor-fraction-demo/sssss16o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scale-factor-fraction-demo/sssss16o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scale-factor-fraction-demo/sssss16o"/>
      <lastmod>2026-11-02T18:25:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scale-factor-fraction-demo/sssss16o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scale-factor-fraction-demo/sssss16o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scale-factor-fraction-demo/sssss16o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scale-factor-fraction-demo/sssss16o"/>
      <lastmod>2026-11-02T18:25:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/medians-of-a-triangle-teacher-version-visualizing-the-centroid-and-median-pr/sssss1gs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-of-a-triangle-teacher-version-visualizing-the-centroid-and-median-pr/sssss1gs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-of-a-triangle-teacher-version-visualizing-the-centroid-and-median-pr/sssss1gs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-of-a-triangle-teacher-version-visualizing-the-centroid-and-median-pr/sssss1gs"/>
      <lastmod>2026-11-01T20:59:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/medians-of-a-triangle-teacher-version-visualizing-the-centroid-and-median-pr/sssss1gs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-of-a-triangle-teacher-version-visualizing-the-centroid-and-median-pr/sssss1gs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-of-a-triangle-teacher-version-visualizing-the-centroid-and-median-pr/sssss1gs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-of-a-triangle-teacher-version-visualizing-the-centroid-and-median-pr/sssss1gs"/>
      <lastmod>2026-11-01T20:59:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modified-toolbar-construction-challenges-lines-and-hyperbolas/sssss1g7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modified-toolbar-construction-challenges-lines-and-hyperbolas/sssss1g7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modified-toolbar-construction-challenges-lines-and-hyperbolas/sssss1g7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modified-toolbar-construction-challenges-lines-and-hyperbolas/sssss1g7"/>
      <lastmod>2026-11-01T21:27:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modified-toolbar-construction-challenges-lines-and-hyperbolas/sssss1g7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modified-toolbar-construction-challenges-lines-and-hyperbolas/sssss1g7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modified-toolbar-construction-challenges-lines-and-hyperbolas/sssss1g7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modified-toolbar-construction-challenges-lines-and-hyperbolas/sssss1g7"/>
      <lastmod>2026-11-01T21:27:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-focus-directrix-definition/sssss1gn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-focus-directrix-definition/sssss1gn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-focus-directrix-definition/sssss1gn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-focus-directrix-definition/sssss1gn"/>
      <lastmod>2026-11-01T19:29:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-focus-directrix-definition/sssss1gn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-focus-directrix-definition/sssss1gn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-focus-directrix-definition/sssss1gn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-focus-directrix-definition/sssss1gn"/>
      <lastmod>2026-11-01T19:29:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-score-demonstration/sssss1g2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-score-demonstration/sssss1g2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-score-demonstration/sssss1g2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-score-demonstration/sssss1g2"/>
      <lastmod>2026-11-02T16:48:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-score-demonstration/sssss1g2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-score-demonstration/sssss1g2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-score-demonstration/sssss1g2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-score-demonstration/sssss1g2"/>
      <lastmod>2026-11-02T16:48:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animations-of-conic-sections/sssss1gk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animations-of-conic-sections/sssss1gk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animations-of-conic-sections/sssss1gk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animations-of-conic-sections/sssss1gk"/>
      <lastmod>2026-11-01T22:10:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animations-of-conic-sections/sssss1gk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animations-of-conic-sections/sssss1gk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animations-of-conic-sections/sssss1gk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animations-of-conic-sections/sssss1gk"/>
      <lastmod>2026-11-01T22:10:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-function-transformation/sssss1gz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-transformation/sssss1gz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-transformation/sssss1gz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-transformation/sssss1gz"/>
      <lastmod>2026-11-02T11:55:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-function-transformation/sssss1gz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-transformation/sssss1gz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-transformation/sssss1gz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-transformation/sssss1gz"/>
      <lastmod>2026-11-02T11:55:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-addition-postulate-dynamic-demonstration-and-geometric-construction/sssss1g0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-dynamic-demonstration-and-geometric-construction/sssss1g0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-addition-postulate-dynamic-demonstration-and-geometric-construction/sssss1g0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-dynamic-demonstration-and-geometric-construction/sssss1g0"/>
      <lastmod>2026-11-02T15:37:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-addition-postulate-dynamic-demonstration-and-geometric-construction/sssss1g0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-dynamic-demonstration-and-geometric-construction/sssss1g0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-addition-postulate-dynamic-demonstration-and-geometric-construction/sssss1g0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-dynamic-demonstration-and-geometric-construction/sssss1g0"/>
      <lastmod>2026-11-02T15:37:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-via-parametric-equations/sssss1gd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-via-parametric-equations/sssss1gd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-via-parametric-equations/sssss1gd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-via-parametric-equations/sssss1gd"/>
      <lastmod>2026-11-01T19:00:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-via-parametric-equations/sssss1gd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-via-parametric-equations/sssss1gd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-via-parametric-equations/sssss1gd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-via-parametric-equations/sssss1gd"/>
      <lastmod>2026-11-01T19:00:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolas-with-real-roots/sssss1gf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas-with-real-roots/sssss1gf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas-with-real-roots/sssss1gf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas-with-real-roots/sssss1gf"/>
      <lastmod>2026-11-02T18:47:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabolas-with-real-roots/sssss1gf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas-with-real-roots/sssss1gf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas-with-real-roots/sssss1gf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas-with-real-roots/sssss1gf"/>
      <lastmod>2026-11-02T18:47:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/van-schooten-s-theorem-a-geometric-proof/sssss1g8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/van-schooten-s-theorem-a-geometric-proof/sssss1g8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/van-schooten-s-theorem-a-geometric-proof/sssss1g8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/van-schooten-s-theorem-a-geometric-proof/sssss1g8"/>
      <lastmod>2026-11-01T19:06:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/van-schooten-s-theorem-a-geometric-proof/sssss1g8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/van-schooten-s-theorem-a-geometric-proof/sssss1g8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/van-schooten-s-theorem-a-geometric-proof/sssss1g8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/van-schooten-s-theorem-a-geometric-proof/sssss1g8"/>
      <lastmod>2026-11-01T19:06:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-the-surface-area-of-a-sphere/sssss1gu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-the-surface-area-of-a-sphere/sssss1gu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-the-surface-area-of-a-sphere/sssss1gu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-the-surface-area-of-a-sphere/sssss1gu"/>
      <lastmod>2026-11-01T23:19:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-the-surface-area-of-a-sphere/sssss1gu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-the-surface-area-of-a-sphere/sssss1gu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-the-surface-area-of-a-sphere/sssss1gu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-the-surface-area-of-a-sphere/sssss1gu"/>
      <lastmod>2026-11-01T23:19:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-measurements/sssss1g5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-measurements/sssss1g5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-measurements/sssss1g5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-measurements/sssss1g5"/>
      <lastmod>2026-11-02T00:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-measurements/sssss1g5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-measurements/sssss1g5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-measurements/sssss1g5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-measurements/sssss1g5"/>
      <lastmod>2026-11-02T00:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimating-areas-im-7-3-6-practice/sssss1gb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-areas-im-7-3-6-practice/sssss1gb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-areas-im-7-3-6-practice/sssss1gb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-areas-im-7-3-6-practice/sssss1gb"/>
      <lastmod>2026-11-01T20:21:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimating-areas-im-7-3-6-practice/sssss1gb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-areas-im-7-3-6-practice/sssss1gb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-areas-im-7-3-6-practice/sssss1gb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-areas-im-7-3-6-practice/sssss1gb"/>
      <lastmod>2026-11-01T20:21:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ice-cream-prices-simulation-hypergeometric-distribution-integral-demo/sssss1g3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ice-cream-prices-simulation-hypergeometric-distribution-integral-demo/sssss1g3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ice-cream-prices-simulation-hypergeometric-distribution-integral-demo/sssss1g3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ice-cream-prices-simulation-hypergeometric-distribution-integral-demo/sssss1g3"/>
      <lastmod>2026-11-02T18:04:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ice-cream-prices-simulation-hypergeometric-distribution-integral-demo/sssss1g3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ice-cream-prices-simulation-hypergeometric-distribution-integral-demo/sssss1g3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ice-cream-prices-simulation-hypergeometric-distribution-integral-demo/sssss1g3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ice-cream-prices-simulation-hypergeometric-distribution-integral-demo/sssss1g3"/>
      <lastmod>2026-11-02T18:04:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hole-16/sssss1gq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-16/sssss1gq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hole-16/sssss1gq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hole-16/sssss1gq"/>
      <lastmod>2026-11-02T13:35:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hole-16/sssss1gq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-16/sssss1gq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hole-16/sssss1gq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hole-16/sssss1gq"/>
      <lastmod>2026-11-02T13:35:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-unit-circle/sssss1g1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-unit-circle/sssss1g1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-unit-circle/sssss1g1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-unit-circle/sssss1g1"/>
      <lastmod>2026-11-02T17:01:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-unit-circle/sssss1g1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-unit-circle/sssss1g1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-unit-circle/sssss1g1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-unit-circle/sssss1g1"/>
      <lastmod>2026-11-02T17:01:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-derivative-demo/sssss1gm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivative-demo/sssss1gm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivative-demo/sssss1gm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivative-demo/sssss1gm"/>
      <lastmod>2026-11-01T21:26:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-derivative-demo/sssss1gm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivative-demo/sssss1gm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivative-demo/sssss1gm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivative-demo/sssss1gm"/>
      <lastmod>2026-11-01T21:26:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-without-words-a-b/sssss1gj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-a-b/sssss1gj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-a-b/sssss1gj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-a-b/sssss1gj"/>
      <lastmod>2026-11-01T19:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-without-words-a-b/sssss1gj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-a-b/sssss1gj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-a-b/sssss1gj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-a-b/sssss1gj"/>
      <lastmod>2026-11-01T19:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/camel-a-playful-figure-from-geometric-distribution-and-trigonometric-functions/sssss1gp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/camel-a-playful-figure-from-geometric-distribution-and-trigonometric-functions/sssss1gp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/camel-a-playful-figure-from-geometric-distribution-and-trigonometric-functions/sssss1gp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/camel-a-playful-figure-from-geometric-distribution-and-trigonometric-functions/sssss1gp"/>
      <lastmod>2026-11-01T22:11:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/camel-a-playful-figure-from-geometric-distribution-and-trigonometric-functions/sssss1gp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/camel-a-playful-figure-from-geometric-distribution-and-trigonometric-functions/sssss1gp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/camel-a-playful-figure-from-geometric-distribution-and-trigonometric-functions/sssss1gp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/camel-a-playful-figure-from-geometric-distribution-and-trigonometric-functions/sssss1gp"/>
      <lastmod>2026-11-01T22:11:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-data-spread-measures/sssss1gw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-data-spread-measures/sssss1gw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-data-spread-measures/sssss1gw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-data-spread-measures/sssss1gw"/>
      <lastmod>2026-11-02T02:24:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-data-spread-measures/sssss1gw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-data-spread-measures/sssss1gw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-data-spread-measures/sssss1gw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-data-spread-measures/sssss1gw"/>
      <lastmod>2026-11-02T02:24:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-addition-demonstration-by-supakit-ch-2/sssss1g6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-demonstration-by-supakit-ch-2/sssss1g6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-demonstration-by-supakit-ch-2/sssss1g6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-demonstration-by-supakit-ch-2/sssss1g6"/>
      <lastmod>2026-11-02T03:02:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-addition-demonstration-by-supakit-ch-2/sssss1g6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-demonstration-by-supakit-ch-2/sssss1g6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-demonstration-by-supakit-ch-2/sssss1g6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-demonstration-by-supakit-ch-2/sssss1g6"/>
      <lastmod>2026-11-02T03:02:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolic-cylinders/sssss1gg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-cylinders/sssss1gg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-cylinders/sssss1gg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-cylinders/sssss1gg"/>
      <lastmod>2026-11-01T23:49:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabolic-cylinders/sssss1gg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-cylinders/sssss1gg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-cylinders/sssss1gg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-cylinders/sssss1gg"/>
      <lastmod>2026-11-01T23:49:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-graph-transformations/sssss1g9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graph-transformations/sssss1g9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graph-transformations/sssss1g9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graph-transformations/sssss1g9"/>
      <lastmod>2026-11-02T10:46:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-graph-transformations/sssss1g9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graph-transformations/sssss1g9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graph-transformations/sssss1g9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graph-transformations/sssss1g9"/>
      <lastmod>2026-11-02T10:46:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connecting-position-velocity-and-acceleration/sssss1ge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connecting-position-velocity-and-acceleration/sssss1ge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connecting-position-velocity-and-acceleration/sssss1ge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connecting-position-velocity-and-acceleration/sssss1ge"/>
      <lastmod>2026-11-02T16:43:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connecting-position-velocity-and-acceleration/sssss1ge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connecting-position-velocity-and-acceleration/sssss1ge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connecting-position-velocity-and-acceleration/sssss1ge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connecting-position-velocity-and-acceleration/sssss1ge"/>
      <lastmod>2026-11-02T16:43:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-function-periodicity/sssss1gv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-function-periodicity/sssss1gv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-function-periodicity/sssss1gv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-function-periodicity/sssss1gv"/>
      <lastmod>2026-11-01T21:00:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-function-periodicity/sssss1gv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-function-periodicity/sssss1gv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-function-periodicity/sssss1gv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-function-periodicity/sssss1gv"/>
      <lastmod>2026-11-01T21:00:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-at-infinity-of-rational-functions/sssss1g4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-at-infinity-of-rational-functions/sssss1g4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-at-infinity-of-rational-functions/sssss1g4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-at-infinity-of-rational-functions/sssss1g4"/>
      <lastmod>2026-11-02T09:03:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-at-infinity-of-rational-functions/sssss1g4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-at-infinity-of-rational-functions/sssss1g4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-at-infinity-of-rational-functions/sssss1g4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-at-infinity-of-rational-functions/sssss1g4"/>
      <lastmod>2026-11-02T09:03:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proving-triangle-congruence-with-aaa-and-aa/sssss1gl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangle-congruence-with-aaa-and-aa/sssss1gl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangle-congruence-with-aaa-and-aa/sssss1gl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangle-congruence-with-aaa-and-aa/sssss1gl"/>
      <lastmod>2026-11-01T23:38:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proving-triangle-congruence-with-aaa-and-aa/sssss1gl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangle-congruence-with-aaa-and-aa/sssss1gl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangle-congruence-with-aaa-and-aa/sssss1gl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangle-congruence-with-aaa-and-aa/sssss1gl"/>
      <lastmod>2026-11-01T23:38:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-sss-similarity-construction/sssss1gy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-sss-similarity-construction/sssss1gy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-sss-similarity-construction/sssss1gy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-sss-similarity-construction/sssss1gy"/>
      <lastmod>2026-11-02T00:22:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-sss-similarity-construction/sssss1gy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-sss-similarity-construction/sssss1gy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-sss-similarity-construction/sssss1gy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-sss-similarity-construction/sssss1gy"/>
      <lastmod>2026-11-02T00:22:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/envelope-of-unit-circles-centered-on-an-astroid/sssss1ga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/envelope-of-unit-circles-centered-on-an-astroid/sssss1ga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/envelope-of-unit-circles-centered-on-an-astroid/sssss1ga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/envelope-of-unit-circles-centered-on-an-astroid/sssss1ga"/>
      <lastmod>2026-11-01T19:32:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/envelope-of-unit-circles-centered-on-an-astroid/sssss1ga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/envelope-of-unit-circles-centered-on-an-astroid/sssss1ga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/envelope-of-unit-circles-centered-on-an-astroid/sssss1ga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/envelope-of-unit-circles-centered-on-an-astroid/sssss1ga"/>
      <lastmod>2026-11-01T19:32:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dividing-rational-numbers-geogebra-practice/sssss1gc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-rational-numbers-geogebra-practice/sssss1gc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-rational-numbers-geogebra-practice/sssss1gc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-rational-numbers-geogebra-practice/sssss1gc"/>
      <lastmod>2026-11-02T10:37:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dividing-rational-numbers-geogebra-practice/sssss1gc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-rational-numbers-geogebra-practice/sssss1gc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-rational-numbers-geogebra-practice/sssss1gc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-rational-numbers-geogebra-practice/sssss1gc"/>
      <lastmod>2026-11-02T10:37:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-radian-measure-with-input-boxes/sssss1gr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-radian-measure-with-input-boxes/sssss1gr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-radian-measure-with-input-boxes/sssss1gr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-radian-measure-with-input-boxes/sssss1gr"/>
      <lastmod>2026-11-02T18:33:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-radian-measure-with-input-boxes/sssss1gr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-radian-measure-with-input-boxes/sssss1gr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-radian-measure-with-input-boxes/sssss1gr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-radian-measure-with-input-boxes/sssss1gr"/>
      <lastmod>2026-11-02T18:33:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bouncing-ball/sssss1gh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bouncing-ball/sssss1gh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bouncing-ball/sssss1gh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bouncing-ball/sssss1gh"/>
      <lastmod>2026-11-01T23:50:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bouncing-ball/sssss1gh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bouncing-ball/sssss1gh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bouncing-ball/sssss1gh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bouncing-ball/sssss1gh"/>
      <lastmod>2026-11-01T23:50:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-by-tuppermath/sssss1gt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-tuppermath/sssss1gt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-tuppermath/sssss1gt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-tuppermath/sssss1gt"/>
      <lastmod>2026-11-02T13:50:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-by-tuppermath/sssss1gt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-tuppermath/sssss1gt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-tuppermath/sssss1gt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-tuppermath/sssss1gt"/>
      <lastmod>2026-11-02T13:50:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/axis-of-rotation-construction/sssss1gx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axis-of-rotation-construction/sssss1gx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axis-of-rotation-construction/sssss1gx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axis-of-rotation-construction/sssss1gx"/>
      <lastmod>2026-11-02T13:29:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/axis-of-rotation-construction/sssss1gx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axis-of-rotation-construction/sssss1gx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axis-of-rotation-construction/sssss1gx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axis-of-rotation-construction/sssss1gx"/>
      <lastmod>2026-11-02T13:29:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/submarine-coordinates-game/sssss1gi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/submarine-coordinates-game/sssss1gi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/submarine-coordinates-game/sssss1gi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/submarine-coordinates-game/sssss1gi"/>
      <lastmod>2026-11-02T16:33:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/submarine-coordinates-game/sssss1gi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/submarine-coordinates-game/sssss1gi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/submarine-coordinates-game/sssss1gi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/submarine-coordinates-game/sssss1gi"/>
      <lastmod>2026-11-02T16:33:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distributive-property-demo/sssss1go</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distributive-property-demo/sssss1go"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distributive-property-demo/sssss1go"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distributive-property-demo/sssss1go"/>
      <lastmod>2026-11-02T02:48:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distributive-property-demo/sssss1go</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distributive-property-demo/sssss1go"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distributive-property-demo/sssss1go"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distributive-property-demo/sssss1go"/>
      <lastmod>2026-11-02T02:48:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-exponential-functions-graphs-and-properties/sssss19s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-exponential-functions-graphs-and-properties/sssss19s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-exponential-functions-graphs-and-properties/sssss19s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-exponential-functions-graphs-and-properties/sssss19s"/>
      <lastmod>2026-11-02T11:01:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-exponential-functions-graphs-and-properties/sssss19s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-exponential-functions-graphs-and-properties/sssss19s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-exponential-functions-graphs-and-properties/sssss19s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-exponential-functions-graphs-and-properties/sssss19s"/>
      <lastmod>2026-11-02T11:01:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sliders-circles-discovery-beginner-exercise-13/sssss197</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliders-circles-discovery-beginner-exercise-13/sssss197"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliders-circles-discovery-beginner-exercise-13/sssss197"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliders-circles-discovery-beginner-exercise-13/sssss197"/>
      <lastmod>2026-11-02T03:10:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sliders-circles-discovery-beginner-exercise-13/sssss197</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliders-circles-discovery-beginner-exercise-13/sssss197"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliders-circles-discovery-beginner-exercise-13/sssss197"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliders-circles-discovery-beginner-exercise-13/sssss197"/>
      <lastmod>2026-11-02T03:10:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-by-aviva-benson/sssss19n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-by-aviva-benson/sssss19n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-by-aviva-benson/sssss19n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-by-aviva-benson/sssss19n"/>
      <lastmod>2026-11-02T17:56:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-by-aviva-benson/sssss19n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-by-aviva-benson/sssss19n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-by-aviva-benson/sssss19n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-by-aviva-benson/sssss19n"/>
      <lastmod>2026-11-02T17:56:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/clocks-and-angles/sssss192</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clocks-and-angles/sssss192"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clocks-and-angles/sssss192"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clocks-and-angles/sssss192"/>
      <lastmod>2026-11-01T23:36:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/clocks-and-angles/sssss192</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clocks-and-angles/sssss192"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clocks-and-angles/sssss192"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clocks-and-angles/sssss192"/>
      <lastmod>2026-11-01T23:36:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculus-of-limits/sssss19k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculus-of-limits/sssss19k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculus-of-limits/sssss19k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculus-of-limits/sssss19k"/>
      <lastmod>2026-11-02T08:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculus-of-limits/sssss19k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculus-of-limits/sssss19k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculus-of-limits/sssss19k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculus-of-limits/sssss19k"/>
      <lastmod>2026-11-02T08:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-a-line/sssss19z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-line/sssss19z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-line/sssss19z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-line/sssss19z"/>
      <lastmod>2026-11-01T21:33:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-a-line/sssss19z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-line/sssss19z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-line/sssss19z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-line/sssss19z"/>
      <lastmod>2026-11-01T21:33:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-anatomy-and-investigation/sssss190</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-anatomy-and-investigation/sssss190"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-exponential-functions-anatomy-and-investigation/sssss190"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-anatomy-and-investigation/sssss190"/>
      <lastmod>2026-11-01T23:08:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphs-of-exponential-functions-anatomy-and-investigation/sssss190</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-anatomy-and-investigation/sssss190"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-exponential-functions-anatomy-and-investigation/sssss190"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-anatomy-and-investigation/sssss190"/>
      <lastmod>2026-11-01T23:08:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructions-lab/sssss19d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructions-lab/sssss19d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructions-lab/sssss19d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructions-lab/sssss19d"/>
      <lastmod>2026-11-02T12:24:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructions-lab/sssss19d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructions-lab/sssss19d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructions-lab/sssss19d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructions-lab/sssss19d"/>
      <lastmod>2026-11-02T12:24:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-functions-and-polygon-optimization/sssss19f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-and-polygon-optimization/sssss19f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-and-polygon-optimization/sssss19f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-and-polygon-optimization/sssss19f"/>
      <lastmod>2026-11-02T18:48:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-functions-and-polygon-optimization/sssss19f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-and-polygon-optimization/sssss19f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-and-polygon-optimization/sssss19f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-and-polygon-optimization/sssss19f"/>
      <lastmod>2026-11-02T18:48:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/choral-counting-recording/sssss198</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/choral-counting-recording/sssss198"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/choral-counting-recording/sssss198"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/choral-counting-recording/sssss198"/>
      <lastmod>2026-11-01T23:09:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/choral-counting-recording/sssss198</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/choral-counting-recording/sssss198"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/choral-counting-recording/sssss198"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/choral-counting-recording/sssss198"/>
      <lastmod>2026-11-01T23:09:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-interior-angles-of-polygons/sssss19u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-interior-angles-of-polygons/sssss19u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-interior-angles-of-polygons/sssss19u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-interior-angles-of-polygons/sssss19u"/>
      <lastmod>2026-11-02T18:53:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-interior-angles-of-polygons/sssss19u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-interior-angles-of-polygons/sssss19u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-interior-angles-of-polygons/sssss19u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-interior-angles-of-polygons/sssss19u"/>
      <lastmod>2026-11-02T18:53:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gear-mechanism/sssss195</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gear-mechanism/sssss195"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gear-mechanism/sssss195"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gear-mechanism/sssss195"/>
      <lastmod>2026-11-02T09:29:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gear-mechanism/sssss195</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gear-mechanism/sssss195"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gear-mechanism/sssss195"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gear-mechanism/sssss195"/>
      <lastmod>2026-11-02T09:29:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-model/sssss19b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-model/sssss19b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-model/sssss19b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-model/sssss19b"/>
      <lastmod>2026-11-01T23:53:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-model/sssss19b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-model/sssss19b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-model/sssss19b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-model/sssss19b"/>
      <lastmod>2026-11-01T23:53:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-exploration-task/sssss193</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-exploration-task/sssss193"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-exploration-task/sssss193"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-exploration-task/sssss193"/>
      <lastmod>2026-11-02T09:47:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-exploration-task/sssss193</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-exploration-task/sssss193"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-exploration-task/sssss193"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-exploration-task/sssss193"/>
      <lastmod>2026-11-02T09:47:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sas-triangle-congruence-demo/sssss19q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence-demo/sssss19q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-triangle-congruence-demo/sssss19q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence-demo/sssss19q"/>
      <lastmod>2026-11-01T20:46:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sas-triangle-congruence-demo/sssss19q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence-demo/sssss19q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-triangle-congruence-demo/sssss19q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence-demo/sssss19q"/>
      <lastmod>2026-11-01T20:46:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-properties-by-kelly-curtis/sssss191</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-properties-by-kelly-curtis/sssss191"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-properties-by-kelly-curtis/sssss191"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-properties-by-kelly-curtis/sssss191"/>
      <lastmod>2026-11-02T13:15:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-properties-by-kelly-curtis/sssss191</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-properties-by-kelly-curtis/sssss191"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-properties-by-kelly-curtis/sssss191"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-properties-by-kelly-curtis/sssss191"/>
      <lastmod>2026-11-02T13:15:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-regression-vs-best-fit-line/sssss19m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-vs-best-fit-line/sssss19m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-vs-best-fit-line/sssss19m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-vs-best-fit-line/sssss19m"/>
      <lastmod>2026-11-02T15:18:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-regression-vs-best-fit-line/sssss19m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-vs-best-fit-line/sssss19m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-vs-best-fit-line/sssss19m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-vs-best-fit-line/sssss19m"/>
      <lastmod>2026-11-02T15:18:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-circles-relation-with-periods-mandelbrot-set/sssss19j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-circles-relation-with-periods-mandelbrot-set/sssss19j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-circles-relation-with-periods-mandelbrot-set/sssss19j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-circles-relation-with-periods-mandelbrot-set/sssss19j"/>
      <lastmod>2026-11-01T19:03:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-circles-relation-with-periods-mandelbrot-set/sssss19j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-circles-relation-with-periods-mandelbrot-set/sssss19j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-circles-relation-with-periods-mandelbrot-set/sssss19j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-circles-relation-with-periods-mandelbrot-set/sssss19j"/>
      <lastmod>2026-11-01T19:03:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-polygons-demo/sssss19p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-polygons-demo/sssss19p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-polygons-demo/sssss19p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-polygons-demo/sssss19p"/>
      <lastmod>2026-11-01T23:59:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-polygons-demo/sssss19p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-polygons-demo/sssss19p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-polygons-demo/sssss19p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-polygons-demo/sssss19p"/>
      <lastmod>2026-11-01T23:59:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-visualization-cueba0028/sssss19w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-visualization-cueba0028/sssss19w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-visualization-cueba0028/sssss19w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-visualization-cueba0028/sssss19w"/>
      <lastmod>2026-11-02T02:49:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-visualization-cueba0028/sssss19w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-visualization-cueba0028/sssss19w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-visualization-cueba0028/sssss19w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-visualization-cueba0028/sssss19w"/>
      <lastmod>2026-11-02T02:49:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/various-methods-to-construct-a-cardioid/sssss196</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/various-methods-to-construct-a-cardioid/sssss196"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/various-methods-to-construct-a-cardioid/sssss196"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/various-methods-to-construct-a-cardioid/sssss196"/>
      <lastmod>2026-11-01T23:13:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/various-methods-to-construct-a-cardioid/sssss196</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/various-methods-to-construct-a-cardioid/sssss196"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/various-methods-to-construct-a-cardioid/sssss196"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/various-methods-to-construct-a-cardioid/sssss196"/>
      <lastmod>2026-11-01T23:13:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-completing-the-square/sssss19g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-completing-the-square/sssss19g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-by-completing-the-square/sssss19g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-completing-the-square/sssss19g"/>
      <lastmod>2026-11-02T15:03:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-quadratic-equations-by-completing-the-square/sssss19g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-completing-the-square/sssss19g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-by-completing-the-square/sssss19g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-completing-the-square/sssss19g"/>
      <lastmod>2026-11-02T15:03:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/points-lines-and-planes-by-powere/sssss199</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-by-powere/sssss199"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-lines-and-planes-by-powere/sssss199"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-by-powere/sssss199"/>
      <lastmod>2026-11-02T08:37:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/points-lines-and-planes-by-powere/sssss199</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-by-powere/sssss199"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-lines-and-planes-by-powere/sssss199"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-by-powere/sssss199"/>
      <lastmod>2026-11-02T08:37:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rational-function-grapher/sssss19e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-function-grapher/sssss19e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-function-grapher/sssss19e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-function-grapher/sssss19e"/>
      <lastmod>2026-11-02T13:11:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rational-function-grapher/sssss19e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-function-grapher/sssss19e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-function-grapher/sssss19e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-function-grapher/sssss19e"/>
      <lastmod>2026-11-02T13:11:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-and-sequence-correlation/sssss19v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-sequence-correlation/sssss19v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-sequence-correlation/sssss19v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-sequence-correlation/sssss19v"/>
      <lastmod>2026-11-02T02:25:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-and-sequence-correlation/sssss19v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-sequence-correlation/sssss19v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-sequence-correlation/sssss19v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-sequence-correlation/sssss19v"/>
      <lastmod>2026-11-02T02:25:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/central-angles-inscribed-angles-and-intercepted-arcs/sssss194</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-angles-inscribed-angles-and-intercepted-arcs/sssss194"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-angles-inscribed-angles-and-intercepted-arcs/sssss194"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-angles-inscribed-angles-and-intercepted-arcs/sssss194"/>
      <lastmod>2026-11-02T02:59:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/central-angles-inscribed-angles-and-intercepted-arcs/sssss194</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-angles-inscribed-angles-and-intercepted-arcs/sssss194"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-angles-inscribed-angles-and-intercepted-arcs/sssss194"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-angles-inscribed-angles-and-intercepted-arcs/sssss194"/>
      <lastmod>2026-11-02T02:59:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-by-p-porras/sssss19l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-by-p-porras/sssss19l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-by-p-porras/sssss19l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-by-p-porras/sssss19l"/>
      <lastmod>2026-11-02T12:44:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-by-p-porras/sssss19l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-by-p-porras/sssss19l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-by-p-porras/sssss19l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-by-p-porras/sssss19l"/>
      <lastmod>2026-11-02T12:44:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/laws-of-exponents-3-power-of-a-power/sssss19y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/laws-of-exponents-3-power-of-a-power/sssss19y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/laws-of-exponents-3-power-of-a-power/sssss19y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/laws-of-exponents-3-power-of-a-power/sssss19y"/>
      <lastmod>2026-11-01T20:52:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/laws-of-exponents-3-power-of-a-power/sssss19y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/laws-of-exponents-3-power-of-a-power/sssss19y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/laws-of-exponents-3-power-of-a-power/sssss19y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/laws-of-exponents-3-power-of-a-power/sssss19y"/>
      <lastmod>2026-11-01T20:52:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/h2m-l12-q4/sssss19a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h2m-l12-q4/sssss19a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h2m-l12-q4/sssss19a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h2m-l12-q4/sssss19a"/>
      <lastmod>2026-11-01T19:19:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/h2m-l12-q4/sssss19a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h2m-l12-q4/sssss19a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h2m-l12-q4/sssss19a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h2m-l12-q4/sssss19a"/>
      <lastmod>2026-11-01T19:19:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/strange-cylinder/sssss19c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/strange-cylinder/sssss19c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/strange-cylinder/sssss19c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/strange-cylinder/sssss19c"/>
      <lastmod>2026-11-02T18:06:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/strange-cylinder/sssss19c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/strange-cylinder/sssss19c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/strange-cylinder/sssss19c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/strange-cylinder/sssss19c"/>
      <lastmod>2026-11-02T18:06:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-two-vectors-using-parallelogram-method/sssss19r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-two-vectors-using-parallelogram-method/sssss19r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-two-vectors-using-parallelogram-method/sssss19r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-two-vectors-using-parallelogram-method/sssss19r"/>
      <lastmod>2026-11-01T21:43:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-two-vectors-using-parallelogram-method/sssss19r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-two-vectors-using-parallelogram-method/sssss19r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-two-vectors-using-parallelogram-method/sssss19r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-two-vectors-using-parallelogram-method/sssss19r"/>
      <lastmod>2026-11-01T21:43:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relationship-between-slope-and-angles-in-unit-circle/sssss19h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-slope-and-angles-in-unit-circle/sssss19h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-slope-and-angles-in-unit-circle/sssss19h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-slope-and-angles-in-unit-circle/sssss19h"/>
      <lastmod>2026-11-02T18:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relationship-between-slope-and-angles-in-unit-circle/sssss19h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-slope-and-angles-in-unit-circle/sssss19h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-slope-and-angles-in-unit-circle/sssss19h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-slope-and-angles-in-unit-circle/sssss19h"/>
      <lastmod>2026-11-02T18:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-explanations-and-construction/sssss19t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-explanations-and-construction/sssss19t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-explanations-and-construction/sssss19t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-explanations-and-construction/sssss19t"/>
      <lastmod>2026-11-01T19:25:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-explanations-and-construction/sssss19t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-explanations-and-construction/sssss19t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-explanations-and-construction/sssss19t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-explanations-and-construction/sssss19t"/>
      <lastmod>2026-11-01T19:25:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-mr-w/sssss19x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-mr-w/sssss19x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-by-mr-w/sssss19x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-mr-w/sssss19x"/>
      <lastmod>2026-11-02T18:54:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-quadratic-equations-by-mr-w/sssss19x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-mr-w/sssss19x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-by-mr-w/sssss19x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-mr-w/sssss19x"/>
      <lastmod>2026-11-02T18:54:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-lines-and-transversals-theorem-demo/sssss19i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-and-transversals-theorem-demo/sssss19i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-and-transversals-theorem-demo/sssss19i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-and-transversals-theorem-demo/sssss19i"/>
      <lastmod>2026-11-02T18:25:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-lines-and-transversals-theorem-demo/sssss19i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-and-transversals-theorem-demo/sssss19i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-and-transversals-theorem-demo/sssss19i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-and-transversals-theorem-demo/sssss19i"/>
      <lastmod>2026-11-02T18:25:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/stokes-theorem-line-integrals-and-surface-integrals/sssss19o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stokes-theorem-line-integrals-and-surface-integrals/sssss19o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stokes-theorem-line-integrals-and-surface-integrals/sssss19o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stokes-theorem-line-integrals-and-surface-integrals/sssss19o"/>
      <lastmod>2026-11-02T16:59:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/stokes-theorem-line-integrals-and-surface-integrals/sssss19o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stokes-theorem-line-integrals-and-surface-integrals/sssss19o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stokes-theorem-line-integrals-and-surface-integrals/sssss19o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stokes-theorem-line-integrals-and-surface-integrals/sssss19o"/>
      <lastmod>2026-11-02T16:59:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circles-in-triangle-combinatorial-geometry/sssss1es</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circles-in-triangle-combinatorial-geometry/sssss1es"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circles-in-triangle-combinatorial-geometry/sssss1es"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circles-in-triangle-combinatorial-geometry/sssss1es"/>
      <lastmod>2026-11-01T20:41:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circles-in-triangle-combinatorial-geometry/sssss1es</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circles-in-triangle-combinatorial-geometry/sssss1es"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circles-in-triangle-combinatorial-geometry/sssss1es"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circles-in-triangle-combinatorial-geometry/sssss1es"/>
      <lastmod>2026-11-01T20:41:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-construction-by-jennifer-gorsline/sssss1e7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-jennifer-gorsline/sssss1e7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-construction-by-jennifer-gorsline/sssss1e7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-jennifer-gorsline/sssss1e7"/>
      <lastmod>2026-11-02T18:21:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-construction-by-jennifer-gorsline/sssss1e7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-jennifer-gorsline/sssss1e7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-construction-by-jennifer-gorsline/sssss1e7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-jennifer-gorsline/sssss1e7"/>
      <lastmod>2026-11-02T18:21:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-construction-on-a-sphere/sssss1en</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-construction-on-a-sphere/sssss1en"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-construction-on-a-sphere/sssss1en"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-construction-on-a-sphere/sssss1en"/>
      <lastmod>2026-11-02T03:18:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-construction-on-a-sphere/sssss1en</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-construction-on-a-sphere/sssss1en"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-construction-on-a-sphere/sssss1en"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-construction-on-a-sphere/sssss1en"/>
      <lastmod>2026-11-02T03:18:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-over-y-axis/sssss1e2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-over-y-axis/sssss1e2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-over-y-axis/sssss1e2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-over-y-axis/sssss1e2"/>
      <lastmod>2026-11-02T18:10:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-over-y-axis/sssss1e2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-over-y-axis/sssss1e2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-over-y-axis/sssss1e2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-over-y-axis/sssss1e2"/>
      <lastmod>2026-11-02T18:10:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/funicular-by-one-point/sssss1ek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/funicular-by-one-point/sssss1ek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/funicular-by-one-point/sssss1ek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/funicular-by-one-point/sssss1ek"/>
      <lastmod>2026-11-02T12:20:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/funicular-by-one-point/sssss1ek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/funicular-by-one-point/sssss1ek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/funicular-by-one-point/sssss1ek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/funicular-by-one-point/sssss1ek"/>
      <lastmod>2026-11-02T12:20:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolas/sssss1ez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas/sssss1ez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas/sssss1ez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas/sssss1ez"/>
      <lastmod>2026-11-02T02:38:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabolas/sssss1ez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas/sssss1ez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas/sssss1ez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas/sssss1ez"/>
      <lastmod>2026-11-02T02:38:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-solutions-to-inequalities-in-context/sssss1e0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-solutions-to-inequalities-in-context/sssss1e0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-solutions-to-inequalities-in-context/sssss1e0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-solutions-to-inequalities-in-context/sssss1e0"/>
      <lastmod>2026-11-01T22:54:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-solutions-to-inequalities-in-context/sssss1e0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-solutions-to-inequalities-in-context/sssss1e0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-solutions-to-inequalities-in-context/sssss1e0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-solutions-to-inequalities-in-context/sssss1e0"/>
      <lastmod>2026-11-01T22:54:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-scanning-by-juan-carlos-ponce-campuzano/sssss1ed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-scanning-by-juan-carlos-ponce-campuzano/sssss1ed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-scanning-by-juan-carlos-ponce-campuzano/sssss1ed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-scanning-by-juan-carlos-ponce-campuzano/sssss1ed"/>
      <lastmod>2026-11-01T23:28:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-scanning-by-juan-carlos-ponce-campuzano/sssss1ed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-scanning-by-juan-carlos-ponce-campuzano/sssss1ed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-scanning-by-juan-carlos-ponce-campuzano/sssss1ed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-scanning-by-juan-carlos-ponce-campuzano/sssss1ed"/>
      <lastmod>2026-11-01T23:28:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-functions-exploration/sssss1ef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-functions-exploration/sssss1ef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-functions-exploration/sssss1ef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-functions-exploration/sssss1ef"/>
      <lastmod>2026-11-02T18:28:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-functions-exploration/sssss1ef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-functions-exploration/sssss1ef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-functions-exploration/sssss1ef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-functions-exploration/sssss1ef"/>
      <lastmod>2026-11-02T18:28:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-curve-and-right-triangle-locus-demo/sssss1e8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curve-and-right-triangle-locus-demo/sssss1e8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curve-and-right-triangle-locus-demo/sssss1e8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curve-and-right-triangle-locus-demo/sssss1e8"/>
      <lastmod>2026-11-02T16:39:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-curve-and-right-triangle-locus-demo/sssss1e8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curve-and-right-triangle-locus-demo/sssss1e8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curve-and-right-triangle-locus-demo/sssss1e8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curve-and-right-triangle-locus-demo/sssss1e8"/>
      <lastmod>2026-11-02T16:39:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/capareda-curves-epitrochoids/sssss1eu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/capareda-curves-epitrochoids/sssss1eu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/capareda-curves-epitrochoids/sssss1eu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/capareda-curves-epitrochoids/sssss1eu"/>
      <lastmod>2026-11-02T17:48:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/capareda-curves-epitrochoids/sssss1eu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/capareda-curves-epitrochoids/sssss1eu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/capareda-curves-epitrochoids/sssss1eu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/capareda-curves-epitrochoids/sssss1eu"/>
      <lastmod>2026-11-02T17:48:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-setup-game/sssss1e5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-setup-game/sssss1e5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-setup-game/sssss1e5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-setup-game/sssss1e5"/>
      <lastmod>2026-11-02T18:32:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-setup-game/sssss1e5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-setup-game/sssss1e5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-setup-game/sssss1e5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-setup-game/sssss1e5"/>
      <lastmod>2026-11-02T18:32:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-trapezoid-properties-with-geogebra/sssss1eb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-trapezoid-properties-with-geogebra/sssss1eb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-trapezoid-properties-with-geogebra/sssss1eb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-trapezoid-properties-with-geogebra/sssss1eb"/>
      <lastmod>2026-11-02T09:51:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-trapezoid-properties-with-geogebra/sssss1eb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-trapezoid-properties-with-geogebra/sssss1eb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-trapezoid-properties-with-geogebra/sssss1eb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-trapezoid-properties-with-geogebra/sssss1eb"/>
      <lastmod>2026-11-02T09:51:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic-function/sssss1e3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic-function/sssss1e3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form-of-a-quadratic-function/sssss1e3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic-function/sssss1e3"/>
      <lastmod>2026-11-01T21:18:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertex-form-of-a-quadratic-function/sssss1e3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic-function/sssss1e3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form-of-a-quadratic-function/sssss1e3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic-function/sssss1e3"/>
      <lastmod>2026-11-01T21:18:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/incenter-demonstration/sssss1eq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incenter-demonstration/sssss1eq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incenter-demonstration/sssss1eq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incenter-demonstration/sssss1eq"/>
      <lastmod>2026-11-02T18:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/incenter-demonstration/sssss1eq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incenter-demonstration/sssss1eq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incenter-demonstration/sssss1eq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incenter-demonstration/sssss1eq"/>
      <lastmod>2026-11-02T18:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-series-demo-by-darika-siripala/sssss1e1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-series-demo-by-darika-siripala/sssss1e1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-series-demo-by-darika-siripala/sssss1e1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-series-demo-by-darika-siripala/sssss1e1"/>
      <lastmod>2026-11-02T02:28:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-series-demo-by-darika-siripala/sssss1e1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-series-demo-by-darika-siripala/sssss1e1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-series-demo-by-darika-siripala/sssss1e1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-series-demo-by-darika-siripala/sssss1e1"/>
      <lastmod>2026-11-02T02:28:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-play-dynamic-area-under-a-curve/sssss1em</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-play-dynamic-area-under-a-curve/sssss1em"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-play-dynamic-area-under-a-curve/sssss1em"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-play-dynamic-area-under-a-curve/sssss1em"/>
      <lastmod>2026-11-01T20:47:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-play-dynamic-area-under-a-curve/sssss1em</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-play-dynamic-area-under-a-curve/sssss1em"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-play-dynamic-area-under-a-curve/sssss1em"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-play-dynamic-area-under-a-curve/sssss1em"/>
      <lastmod>2026-11-01T20:47:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-formula-visualization/sssss1ej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-formula-visualization/sssss1ej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-formula-visualization/sssss1ej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-formula-visualization/sssss1ej"/>
      <lastmod>2026-11-02T18:42:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-formula-visualization/sssss1ej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-formula-visualization/sssss1ej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-formula-visualization/sssss1ej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-formula-visualization/sssss1ej"/>
      <lastmod>2026-11-02T18:42:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-properties-exploration-by-monica-dunsworth/sssss1ep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-properties-exploration-by-monica-dunsworth/sssss1ep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-properties-exploration-by-monica-dunsworth/sssss1ep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-properties-exploration-by-monica-dunsworth/sssss1ep"/>
      <lastmod>2026-11-02T11:51:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-properties-exploration-by-monica-dunsworth/sssss1ep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-properties-exploration-by-monica-dunsworth/sssss1ep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-properties-exploration-by-monica-dunsworth/sssss1ep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-properties-exploration-by-monica-dunsworth/sssss1ep"/>
      <lastmod>2026-11-02T11:51:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-p1/sssss1ew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-p1/sssss1ew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallpaper-symmetry-group-p1/sssss1ew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-p1/sssss1ew"/>
      <lastmod>2026-11-02T18:02:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wallpaper-symmetry-group-p1/sssss1ew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-p1/sssss1ew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallpaper-symmetry-group-p1/sssss1ew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-p1/sssss1ew"/>
      <lastmod>2026-11-02T18:02:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/obtuse-angles-and-the-unit-circle/sssss1e6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/obtuse-angles-and-the-unit-circle/sssss1e6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/obtuse-angles-and-the-unit-circle/sssss1e6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/obtuse-angles-and-the-unit-circle/sssss1e6"/>
      <lastmod>2026-11-02T03:15:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/obtuse-angles-and-the-unit-circle/sssss1e6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/obtuse-angles-and-the-unit-circle/sssss1e6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/obtuse-angles-and-the-unit-circle/sssss1e6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/obtuse-angles-and-the-unit-circle/sssss1e6"/>
      <lastmod>2026-11-02T03:15:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mandelbrot-set-first-period-zoom/sssss1eg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mandelbrot-set-first-period-zoom/sssss1eg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mandelbrot-set-first-period-zoom/sssss1eg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mandelbrot-set-first-period-zoom/sssss1eg"/>
      <lastmod>2026-11-02T16:34:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mandelbrot-set-first-period-zoom/sssss1eg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mandelbrot-set-first-period-zoom/sssss1eg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mandelbrot-set-first-period-zoom/sssss1eg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mandelbrot-set-first-period-zoom/sssss1eg"/>
      <lastmod>2026-11-02T16:34:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-incircle/sssss1e9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-incircle/sssss1e9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-incircle/sssss1e9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-incircle/sssss1e9"/>
      <lastmod>2026-11-02T18:16:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-incircle/sssss1e9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-incircle/sssss1e9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-incircle/sssss1e9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-incircle/sssss1e9"/>
      <lastmod>2026-11-02T18:16:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-parallelogram-law-interactive-demo/sssss1ee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-parallelogram-law-interactive-demo/sssss1ee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-parallelogram-law-interactive-demo/sssss1ee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-parallelogram-law-interactive-demo/sssss1ee"/>
      <lastmod>2026-11-02T18:34:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-parallelogram-law-interactive-demo/sssss1ee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-parallelogram-law-interactive-demo/sssss1ee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-parallelogram-law-interactive-demo/sssss1ee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-parallelogram-law-interactive-demo/sssss1ee"/>
      <lastmod>2026-11-02T18:34:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-geometric-star-patterns/sssss1ev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-star-patterns/sssss1ev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-star-patterns/sssss1ev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-star-patterns/sssss1ev"/>
      <lastmod>2026-11-01T21:02:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-geometric-star-patterns/sssss1ev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-star-patterns/sssss1ev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-star-patterns/sssss1ev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-star-patterns/sssss1ev"/>
      <lastmod>2026-11-01T21:02:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planes-with-4-or-more-dodecahedral-vertices/sssss1e4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-with-4-or-more-dodecahedral-vertices/sssss1e4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-with-4-or-more-dodecahedral-vertices/sssss1e4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-with-4-or-more-dodecahedral-vertices/sssss1e4"/>
      <lastmod>2026-11-02T18:26:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planes-with-4-or-more-dodecahedral-vertices/sssss1e4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-with-4-or-more-dodecahedral-vertices/sssss1e4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-with-4-or-more-dodecahedral-vertices/sssss1e4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-with-4-or-more-dodecahedral-vertices/sssss1e4"/>
      <lastmod>2026-11-02T18:26:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-star-of-david-construction/sssss1el</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-star-of-david-construction/sssss1el"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-star-of-david-construction/sssss1el"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-star-of-david-construction/sssss1el"/>
      <lastmod>2026-11-02T10:39:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-star-of-david-construction/sssss1el</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-star-of-david-construction/sssss1el"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-star-of-david-construction/sssss1el"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-star-of-david-construction/sssss1el"/>
      <lastmod>2026-11-02T10:39:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-art-andrei-m-9d/sssss1ey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-art-andrei-m-9d/sssss1ey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-art-andrei-m-9d/sssss1ey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-art-andrei-m-9d/sssss1ey"/>
      <lastmod>2026-11-01T21:57:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-art-andrei-m-9d/sssss1ey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-art-andrei-m-9d/sssss1ey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-art-andrei-m-9d/sssss1ey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-art-andrei-m-9d/sssss1ey"/>
      <lastmod>2026-11-01T21:57:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-cylinder-by-hui-hui-heng/sssss1ea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cylinder-by-hui-hui-heng/sssss1ea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cylinder-by-hui-hui-heng/sssss1ea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cylinder-by-hui-hui-heng/sssss1ea"/>
      <lastmod>2026-11-02T00:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-cylinder-by-hui-hui-heng/sssss1ea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cylinder-by-hui-hui-heng/sssss1ea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cylinder-by-hui-hui-heng/sssss1ea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cylinder-by-hui-hui-heng/sssss1ea"/>
      <lastmod>2026-11-02T00:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-dilation-demo/sssss1ec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-dilation-demo/sssss1ec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-dilation-demo/sssss1ec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-dilation-demo/sssss1ec"/>
      <lastmod>2026-11-02T18:43:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-dilation-demo/sssss1ec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-dilation-demo/sssss1ec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-dilation-demo/sssss1ec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-dilation-demo/sssss1ec"/>
      <lastmod>2026-11-02T18:43:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-mean-and-median/sssss1er</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-mean-and-median/sssss1er"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-mean-and-median/sssss1er"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-mean-and-median/sssss1er"/>
      <lastmod>2026-11-02T13:01:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-mean-and-median/sssss1er</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-mean-and-median/sssss1er"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-mean-and-median/sssss1er"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-mean-and-median/sssss1er"/>
      <lastmod>2026-11-02T13:01:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cas-perspective-math-demonstration/sssss1eh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cas-perspective-math-demonstration/sssss1eh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cas-perspective-math-demonstration/sssss1eh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cas-perspective-math-demonstration/sssss1eh"/>
      <lastmod>2026-11-01T21:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cas-perspective-math-demonstration/sssss1eh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cas-perspective-math-demonstration/sssss1eh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cas-perspective-math-demonstration/sssss1eh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cas-perspective-math-demonstration/sssss1eh"/>
      <lastmod>2026-11-01T21:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/when-is-the-area-of-an-ellipse-equal-to-an-annulus/sssss1et</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/when-is-the-area-of-an-ellipse-equal-to-an-annulus/sssss1et"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/when-is-the-area-of-an-ellipse-equal-to-an-annulus/sssss1et"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/when-is-the-area-of-an-ellipse-equal-to-an-annulus/sssss1et"/>
      <lastmod>2026-11-02T18:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/when-is-the-area-of-an-ellipse-equal-to-an-annulus/sssss1et</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/when-is-the-area-of-an-ellipse-equal-to-an-annulus/sssss1et"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/when-is-the-area-of-an-ellipse-equal-to-an-annulus/sssss1et"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/when-is-the-area-of-an-ellipse-equal-to-an-annulus/sssss1et"/>
      <lastmod>2026-11-02T18:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fundamental-property-of-rational-numbers/sssss1ex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fundamental-property-of-rational-numbers/sssss1ex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fundamental-property-of-rational-numbers/sssss1ex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fundamental-property-of-rational-numbers/sssss1ex"/>
      <lastmod>2026-11-02T16:47:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fundamental-property-of-rational-numbers/sssss1ex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fundamental-property-of-rational-numbers/sssss1ex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fundamental-property-of-rational-numbers/sssss1ex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fundamental-property-of-rational-numbers/sssss1ex"/>
      <lastmod>2026-11-02T16:47:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dividing-fractions-using-an-algorithm/sssss1ei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-fractions-using-an-algorithm/sssss1ei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-fractions-using-an-algorithm/sssss1ei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-fractions-using-an-algorithm/sssss1ei"/>
      <lastmod>2026-11-02T11:41:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dividing-fractions-using-an-algorithm/sssss1ei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-fractions-using-an-algorithm/sssss1ei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-fractions-using-an-algorithm/sssss1ei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-fractions-using-an-algorithm/sssss1ei"/>
      <lastmod>2026-11-02T11:41:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-graphing-cardioid-sine/sssss1eo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphing-cardioid-sine/sssss1eo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphing-cardioid-sine/sssss1eo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphing-cardioid-sine/sssss1eo"/>
      <lastmod>2026-11-01T23:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-graphing-cardioid-sine/sssss1eo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphing-cardioid-sine/sssss1eo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphing-cardioid-sine/sssss1eo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphing-cardioid-sine/sssss1eo"/>
      <lastmod>2026-11-01T23:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-limits-and-continuity-text-set/sssss1vs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-limits-and-continuity-text-set/sssss1vs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-limits-and-continuity-text-set/sssss1vs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-limits-and-continuity-text-set/sssss1vs"/>
      <lastmod>2026-11-02T03:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-limits-and-continuity-text-set/sssss1vs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-limits-and-continuity-text-set/sssss1vs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-limits-and-continuity-text-set/sssss1vs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-limits-and-continuity-text-set/sssss1vs"/>
      <lastmod>2026-11-02T03:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-2/sssss1v7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-2/sssss1v7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-2/sssss1v7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-2/sssss1v7"/>
      <lastmod>2026-11-02T15:19:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-2/sssss1v7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-2/sssss1v7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-2/sssss1v7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-2/sssss1v7"/>
      <lastmod>2026-11-02T15:19:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-logarithm-graphs/sssss1vn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-logarithm-graphs/sssss1vn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-logarithm-graphs/sssss1vn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-logarithm-graphs/sssss1vn"/>
      <lastmod>2026-11-02T18:32:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-logarithm-graphs/sssss1vn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-logarithm-graphs/sssss1vn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-logarithm-graphs/sssss1vn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-logarithm-graphs/sssss1vn"/>
      <lastmod>2026-11-02T18:32:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-trapezoid-with-fixed-base/sssss1v2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-trapezoid-with-fixed-base/sssss1v2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-trapezoid-with-fixed-base/sssss1v2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-trapezoid-with-fixed-base/sssss1v2"/>
      <lastmod>2026-11-02T18:08:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-trapezoid-with-fixed-base/sssss1v2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-trapezoid-with-fixed-base/sssss1v2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-trapezoid-with-fixed-base/sssss1v2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-trapezoid-with-fixed-base/sssss1v2"/>
      <lastmod>2026-11-02T18:08:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-section-of-a-rectangular-prism-by-stephanie-bagley/sssss1vk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-rectangular-prism-by-stephanie-bagley/sssss1vk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-rectangular-prism-by-stephanie-bagley/sssss1vk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-rectangular-prism-by-stephanie-bagley/sssss1vk"/>
      <lastmod>2026-11-01T19:24:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-section-of-a-rectangular-prism-by-stephanie-bagley/sssss1vk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-rectangular-prism-by-stephanie-bagley/sssss1vk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-rectangular-prism-by-stephanie-bagley/sssss1vk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-rectangular-prism-by-stephanie-bagley/sssss1vk"/>
      <lastmod>2026-11-01T19:24:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-line-for-adding-and-subtracting/sssss1vz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-for-adding-and-subtracting/sssss1vz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-for-adding-and-subtracting/sssss1vz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-for-adding-and-subtracting/sssss1vz"/>
      <lastmod>2026-11-02T18:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-line-for-adding-and-subtracting/sssss1vz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-for-adding-and-subtracting/sssss1vz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-for-adding-and-subtracting/sssss1vz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-for-adding-and-subtracting/sssss1vz"/>
      <lastmod>2026-11-02T18:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kimberling-numbers/sssss1v0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kimberling-numbers/sssss1v0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kimberling-numbers/sssss1v0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kimberling-numbers/sssss1v0"/>
      <lastmod>2026-11-02T18:37:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kimberling-numbers/sssss1v0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kimberling-numbers/sssss1v0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kimberling-numbers/sssss1v0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kimberling-numbers/sssss1v0"/>
      <lastmod>2026-11-02T18:37:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-5/sssss1vd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-5/sssss1vd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solid-of-revolution-5/sssss1vd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-5/sssss1vd"/>
      <lastmod>2026-11-02T15:33:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-solid-of-revolution-5/sssss1vd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-5/sssss1vd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solid-of-revolution-5/sssss1vd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-5/sssss1vd"/>
      <lastmod>2026-11-02T15:33:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformation-of-sine-graph/sssss1vf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-of-sine-graph/sssss1vf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-of-sine-graph/sssss1vf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-of-sine-graph/sssss1vf"/>
      <lastmod>2026-11-02T16:56:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformation-of-sine-graph/sssss1vf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-of-sine-graph/sssss1vf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-of-sine-graph/sssss1vf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-of-sine-graph/sssss1vf"/>
      <lastmod>2026-11-02T16:56:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-regular-polygons-dynamic-geometry-and-optimization/sssss1v8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-regular-polygons-dynamic-geometry-and-optimization/sssss1v8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-regular-polygons-dynamic-geometry-and-optimization/sssss1v8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-regular-polygons-dynamic-geometry-and-optimization/sssss1v8"/>
      <lastmod>2026-11-02T12:51:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-regular-polygons-dynamic-geometry-and-optimization/sssss1v8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-regular-polygons-dynamic-geometry-and-optimization/sssss1v8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-regular-polygons-dynamic-geometry-and-optimization/sssss1v8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-regular-polygons-dynamic-geometry-and-optimization/sssss1v8"/>
      <lastmod>2026-11-02T12:51:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-and-octahedron-to-cuboctahedron-transformation/sssss1vu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-octahedron-to-cuboctahedron-transformation/sssss1vu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-octahedron-to-cuboctahedron-transformation/sssss1vu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-octahedron-to-cuboctahedron-transformation/sssss1vu"/>
      <lastmod>2026-11-01T20:56:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-and-octahedron-to-cuboctahedron-transformation/sssss1vu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-octahedron-to-cuboctahedron-transformation/sssss1vu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-octahedron-to-cuboctahedron-transformation/sssss1vu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-octahedron-to-cuboctahedron-transformation/sssss1vu"/>
      <lastmod>2026-11-01T20:56:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-a-circle/sssss1v5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-a-circle/sssss1v5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-a-circle/sssss1v5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-a-circle/sssss1v5"/>
      <lastmod>2026-11-02T02:30:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-a-circle/sssss1v5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-a-circle/sssss1v5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-a-circle/sssss1v5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-a-circle/sssss1v5"/>
      <lastmod>2026-11-02T02:30:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solids-with-different-cross-sections/sssss1vb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solids-with-different-cross-sections/sssss1vb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solids-with-different-cross-sections/sssss1vb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solids-with-different-cross-sections/sssss1vb"/>
      <lastmod>2026-11-02T16:46:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solids-with-different-cross-sections/sssss1vb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solids-with-different-cross-sections/sssss1vb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solids-with-different-cross-sections/sssss1vb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solids-with-different-cross-sections/sssss1vb"/>
      <lastmod>2026-11-02T16:46:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-function-accuracy-matching-quiz/sssss1v3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-accuracy-matching-quiz/sssss1v3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-accuracy-matching-quiz/sssss1v3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-accuracy-matching-quiz/sssss1v3"/>
      <lastmod>2026-11-01T21:57:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-function-accuracy-matching-quiz/sssss1v3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-accuracy-matching-quiz/sssss1v3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-accuracy-matching-quiz/sssss1v3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-accuracy-matching-quiz/sssss1v3"/>
      <lastmod>2026-11-01T21:57:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-jeff-caldwell/sssss1vq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-jeff-caldwell/sssss1vq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-calculation-by-jeff-caldwell/sssss1vq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-jeff-caldwell/sssss1vq"/>
      <lastmod>2026-11-02T18:03:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-area-calculation-by-jeff-caldwell/sssss1vq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-jeff-caldwell/sssss1vq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-calculation-by-jeff-caldwell/sssss1vq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-jeff-caldwell/sssss1vq"/>
      <lastmod>2026-11-02T18:03:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-roots-of-a-cubic-polynomial/sssss1v1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-roots-of-a-cubic-polynomial/sssss1v1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-roots-of-a-cubic-polynomial/sssss1v1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-roots-of-a-cubic-polynomial/sssss1v1"/>
      <lastmod>2026-11-02T16:29:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-roots-of-a-cubic-polynomial/sssss1v1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-roots-of-a-cubic-polynomial/sssss1v1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-roots-of-a-cubic-polynomial/sssss1v1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-roots-of-a-cubic-polynomial/sssss1v1"/>
      <lastmod>2026-11-02T16:29:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bearings-map-of-europe/sssss1vm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bearings-map-of-europe/sssss1vm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bearings-map-of-europe/sssss1vm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bearings-map-of-europe/sssss1vm"/>
      <lastmod>2026-11-02T18:34:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bearings-map-of-europe/sssss1vm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bearings-map-of-europe/sssss1vm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bearings-map-of-europe/sssss1vm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bearings-map-of-europe/sssss1vm"/>
      <lastmod>2026-11-02T18:34:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/7-1-equivalent-ratios-straight-line-through-origin/sssss1vj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/7-1-equivalent-ratios-straight-line-through-origin/sssss1vj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/7-1-equivalent-ratios-straight-line-through-origin/sssss1vj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/7-1-equivalent-ratios-straight-line-through-origin/sssss1vj"/>
      <lastmod>2026-11-02T12:22:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/7-1-equivalent-ratios-straight-line-through-origin/sssss1vj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/7-1-equivalent-ratios-straight-line-through-origin/sssss1vj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/7-1-equivalent-ratios-straight-line-through-origin/sssss1vj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/7-1-equivalent-ratios-straight-line-through-origin/sssss1vj"/>
      <lastmod>2026-11-02T12:22:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quarter-circle-surprise/sssss1vp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quarter-circle-surprise/sssss1vp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quarter-circle-surprise/sssss1vp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quarter-circle-surprise/sssss1vp"/>
      <lastmod>2026-11-02T17:08:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quarter-circle-surprise/sssss1vp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quarter-circle-surprise/sssss1vp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quarter-circle-surprise/sssss1vp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quarter-circle-surprise/sssss1vp"/>
      <lastmod>2026-11-02T17:08:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-and-stochastic-process-animation/sssss1vw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-and-stochastic-process-animation/sssss1vw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-and-stochastic-process-animation/sssss1vw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-and-stochastic-process-animation/sssss1vw"/>
      <lastmod>2026-11-02T17:39:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-and-stochastic-process-animation/sssss1vw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-and-stochastic-process-animation/sssss1vw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-and-stochastic-process-animation/sssss1vw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-and-stochastic-process-animation/sssss1vw"/>
      <lastmod>2026-11-02T17:39:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-the-volume-of-a-pyramid/sssss1v6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-the-volume-of-a-pyramid/sssss1v6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-the-volume-of-a-pyramid/sssss1v6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-the-volume-of-a-pyramid/sssss1v6"/>
      <lastmod>2026-11-02T18:10:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-the-volume-of-a-pyramid/sssss1v6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-the-volume-of-a-pyramid/sssss1v6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-the-volume-of-a-pyramid/sssss1v6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-the-volume-of-a-pyramid/sssss1v6"/>
      <lastmod>2026-11-02T18:10:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/recursive-solution/sssss1vg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/recursive-solution/sssss1vg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/recursive-solution/sssss1vg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/recursive-solution/sssss1vg"/>
      <lastmod>2026-11-02T16:32:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/recursive-solution/sssss1vg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/recursive-solution/sssss1vg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/recursive-solution/sssss1vg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/recursive-solution/sssss1vg"/>
      <lastmod>2026-11-02T16:32:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-points-dynamic-example/sssss1v9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-dynamic-example/sssss1v9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-dynamic-example/sssss1v9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-dynamic-example/sssss1v9"/>
      <lastmod>2026-11-02T16:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-points-dynamic-example/sssss1v9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-dynamic-example/sssss1v9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-dynamic-example/sssss1v9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-dynamic-example/sssss1v9"/>
      <lastmod>2026-11-02T16:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/generating-a-cylinder/sssss1ve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generating-a-cylinder/sssss1ve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generating-a-cylinder/sssss1ve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generating-a-cylinder/sssss1ve"/>
      <lastmod>2026-11-02T12:45:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/generating-a-cylinder/sssss1ve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generating-a-cylinder/sssss1ve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generating-a-cylinder/sssss1ve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generating-a-cylinder/sssss1ve"/>
      <lastmod>2026-11-02T12:45:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-confidence-intervals/sssss1vv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-confidence-intervals/sssss1vv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-confidence-intervals/sssss1vv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-confidence-intervals/sssss1vv"/>
      <lastmod>2026-11-01T19:28:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-confidence-intervals/sssss1vv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-confidence-intervals/sssss1vv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-confidence-intervals/sssss1vv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-confidence-intervals/sssss1vv"/>
      <lastmod>2026-11-01T19:28:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/piston-movement-equation-demo/sssss1v4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piston-movement-equation-demo/sssss1v4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piston-movement-equation-demo/sssss1v4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piston-movement-equation-demo/sssss1v4"/>
      <lastmod>2026-11-01T23:24:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/piston-movement-equation-demo/sssss1v4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piston-movement-equation-demo/sssss1v4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piston-movement-equation-demo/sssss1v4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piston-movement-equation-demo/sssss1v4"/>
      <lastmod>2026-11-01T23:24:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hl-postulate-for-right-triangle-congruence/sssss1vl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hl-postulate-for-right-triangle-congruence/sssss1vl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hl-postulate-for-right-triangle-congruence/sssss1vl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hl-postulate-for-right-triangle-congruence/sssss1vl"/>
      <lastmod>2026-11-02T02:42:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hl-postulate-for-right-triangle-congruence/sssss1vl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hl-postulate-for-right-triangle-congruence/sssss1vl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hl-postulate-for-right-triangle-congruence/sssss1vl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hl-postulate-for-right-triangle-congruence/sssss1vl"/>
      <lastmod>2026-11-02T02:42:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-vectors-and-function-graphs/sssss1vy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-function-graphs/sssss1vy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-function-graphs/sssss1vy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-function-graphs/sssss1vy"/>
      <lastmod>2026-11-01T21:04:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-vectors-and-function-graphs/sssss1vy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-function-graphs/sssss1vy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-function-graphs/sssss1vy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-function-graphs/sssss1vy"/>
      <lastmod>2026-11-01T21:04:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-in-parallel-lines/sssss1va</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-in-parallel-lines/sssss1va"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-in-parallel-lines/sssss1va"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-in-parallel-lines/sssss1va"/>
      <lastmod>2026-11-01T23:11:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-in-parallel-lines/sssss1va</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-in-parallel-lines/sssss1va"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-in-parallel-lines/sssss1va"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-in-parallel-lines/sssss1va"/>
      <lastmod>2026-11-01T23:11:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relationship-in-a-triangle-with-angle-bisector-and-special-segments/sssss1vc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-in-a-triangle-with-angle-bisector-and-special-segments/sssss1vc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-in-a-triangle-with-angle-bisector-and-special-segments/sssss1vc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-in-a-triangle-with-angle-bisector-and-special-segments/sssss1vc"/>
      <lastmod>2026-11-02T15:42:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relationship-in-a-triangle-with-angle-bisector-and-special-segments/sssss1vc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-in-a-triangle-with-angle-bisector-and-special-segments/sssss1vc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-in-a-triangle-with-angle-bisector-and-special-segments/sssss1vc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-in-a-triangle-with-angle-bisector-and-special-segments/sssss1vc"/>
      <lastmod>2026-11-02T15:42:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-probability-interactive-demo-geogebra/sssss1vr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-probability-interactive-demo-geogebra/sssss1vr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-probability-interactive-demo-geogebra/sssss1vr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-probability-interactive-demo-geogebra/sssss1vr"/>
      <lastmod>2026-11-01T19:28:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-probability-interactive-demo-geogebra/sssss1vr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-probability-interactive-demo-geogebra/sssss1vr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-probability-interactive-demo-geogebra/sssss1vr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-probability-interactive-demo-geogebra/sssss1vr"/>
      <lastmod>2026-11-01T19:28:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiples-of-3-circle-sort/sssss1vh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiples-of-3-circle-sort/sssss1vh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiples-of-3-circle-sort/sssss1vh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiples-of-3-circle-sort/sssss1vh"/>
      <lastmod>2026-11-01T19:09:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiples-of-3-circle-sort/sssss1vh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiples-of-3-circle-sort/sssss1vh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiples-of-3-circle-sort/sssss1vh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiples-of-3-circle-sort/sssss1vh"/>
      <lastmod>2026-11-01T19:09:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-the-aram-n-ski-logo-arag-n-spain/sssss1vt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-aram-n-ski-logo-arag-n-spain/sssss1vt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-aram-n-ski-logo-arag-n-spain/sssss1vt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-aram-n-ski-logo-arag-n-spain/sssss1vt"/>
      <lastmod>2026-11-01T19:35:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-the-aram-n-ski-logo-arag-n-spain/sssss1vt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-aram-n-ski-logo-arag-n-spain/sssss1vt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-aram-n-ski-logo-arag-n-spain/sssss1vt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-aram-n-ski-logo-arag-n-spain/sssss1vt"/>
      <lastmod>2026-11-01T19:35:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directional-derivatives-level-curves-and-gradient/sssss1vx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivatives-level-curves-and-gradient/sssss1vx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivatives-level-curves-and-gradient/sssss1vx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivatives-level-curves-and-gradient/sssss1vx"/>
      <lastmod>2026-11-02T17:55:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directional-derivatives-level-curves-and-gradient/sssss1vx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivatives-level-curves-and-gradient/sssss1vx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivatives-level-curves-and-gradient/sssss1vx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivatives-level-curves-and-gradient/sssss1vx"/>
      <lastmod>2026-11-02T17:55:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-2-10-lesson-introducing-graphs-of-proportional-relationships/sssss1vi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-2-10-lesson-introducing-graphs-of-proportional-relationships/sssss1vi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-2-10-lesson-introducing-graphs-of-proportional-relationships/sssss1vi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-2-10-lesson-introducing-graphs-of-proportional-relationships/sssss1vi"/>
      <lastmod>2026-11-01T23:01:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-2-10-lesson-introducing-graphs-of-proportional-relationships/sssss1vi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-2-10-lesson-introducing-graphs-of-proportional-relationships/sssss1vi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-2-10-lesson-introducing-graphs-of-proportional-relationships/sssss1vi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-2-10-lesson-introducing-graphs-of-proportional-relationships/sssss1vi"/>
      <lastmod>2026-11-01T23:01:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demonstration-of-hyperbola-and-correlation-statistics/sssss1vo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-hyperbola-and-correlation-statistics/sssss1vo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-hyperbola-and-correlation-statistics/sssss1vo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-hyperbola-and-correlation-statistics/sssss1vo"/>
      <lastmod>2026-11-01T21:21:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demonstration-of-hyperbola-and-correlation-statistics/sssss1vo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-hyperbola-and-correlation-statistics/sssss1vo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-hyperbola-and-correlation-statistics/sssss1vo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-hyperbola-and-correlation-statistics/sssss1vo"/>
      <lastmod>2026-11-01T21:21:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-4-7-practice-fraction-of-a-group/sssss14s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-4-7-practice-fraction-of-a-group/sssss14s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-4-7-practice-fraction-of-a-group/sssss14s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-4-7-practice-fraction-of-a-group/sssss14s"/>
      <lastmod>2026-11-02T10:39:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-4-7-practice-fraction-of-a-group/sssss14s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-4-7-practice-fraction-of-a-group/sssss14s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-4-7-practice-fraction-of-a-group/sssss14s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-4-7-practice-fraction-of-a-group/sssss14s"/>
      <lastmod>2026-11-02T10:39:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/electric-field-vectors-superposition-and-geometric-construction/sssss147</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/electric-field-vectors-superposition-and-geometric-construction/sssss147"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/electric-field-vectors-superposition-and-geometric-construction/sssss147"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/electric-field-vectors-superposition-and-geometric-construction/sssss147"/>
      <lastmod>2026-11-01T19:14:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/electric-field-vectors-superposition-and-geometric-construction/sssss147</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/electric-field-vectors-superposition-and-geometric-construction/sssss147"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/electric-field-vectors-superposition-and-geometric-construction/sssss147"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/electric-field-vectors-superposition-and-geometric-construction/sssss147"/>
      <lastmod>2026-11-01T19:14:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-math-problem-posed-by-ed-southall-on-twitter/sssss14n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-math-problem-posed-by-ed-southall-on-twitter/sssss14n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-a-math-problem-posed-by-ed-southall-on-twitter/sssss14n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-math-problem-posed-by-ed-southall-on-twitter/sssss14n"/>
      <lastmod>2026-11-02T03:03:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-a-math-problem-posed-by-ed-southall-on-twitter/sssss14n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-math-problem-posed-by-ed-southall-on-twitter/sssss14n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-a-math-problem-posed-by-ed-southall-on-twitter/sssss14n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-math-problem-posed-by-ed-southall-on-twitter/sssss14n"/>
      <lastmod>2026-11-02T03:03:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reconstruct-the-girih-pattern/sssss142</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reconstruct-the-girih-pattern/sssss142"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reconstruct-the-girih-pattern/sssss142"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reconstruct-the-girih-pattern/sssss142"/>
      <lastmod>2026-11-02T17:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reconstruct-the-girih-pattern/sssss142</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reconstruct-the-girih-pattern/sssss142"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reconstruct-the-girih-pattern/sssss142"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reconstruct-the-girih-pattern/sssss142"/>
      <lastmod>2026-11-02T17:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-circumcenter/sssss14k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-circumcenter/sssss14k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-circumcenter/sssss14k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-circumcenter/sssss14k"/>
      <lastmod>2026-11-02T16:29:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-circumcenter/sssss14k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-circumcenter/sssss14k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-circumcenter/sssss14k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-circumcenter/sssss14k"/>
      <lastmod>2026-11-02T16:29:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-polynomial-parameters-interactive-sliders-for-coefficients/sssss14z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-polynomial-parameters-interactive-sliders-for-coefficients/sssss14z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-polynomial-parameters-interactive-sliders-for-coefficients/sssss14z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-polynomial-parameters-interactive-sliders-for-coefficients/sssss14z"/>
      <lastmod>2026-11-01T22:02:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-polynomial-parameters-interactive-sliders-for-coefficients/sssss14z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-polynomial-parameters-interactive-sliders-for-coefficients/sssss14z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-polynomial-parameters-interactive-sliders-for-coefficients/sssss14z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-polynomial-parameters-interactive-sliders-for-coefficients/sssss14z"/>
      <lastmod>2026-11-01T22:02:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-as-a-locus/sssss140</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-as-a-locus/sssss140"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-as-a-locus/sssss140"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-as-a-locus/sssss140"/>
      <lastmod>2026-11-02T00:33:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-as-a-locus/sssss140</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-as-a-locus/sssss140"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-as-a-locus/sssss140"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-as-a-locus/sssss140"/>
      <lastmod>2026-11-02T00:33:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-function-geometry-exercise/sssss14d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-function-geometry-exercise/sssss14d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-function-geometry-exercise/sssss14d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-function-geometry-exercise/sssss14d"/>
      <lastmod>2026-11-02T13:15:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-function-geometry-exercise/sssss14d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-function-geometry-exercise/sssss14d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-function-geometry-exercise/sssss14d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-function-geometry-exercise/sssss14d"/>
      <lastmod>2026-11-02T13:15:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/measuring-angles-of-polygons/sssss14f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-angles-of-polygons/sssss14f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-angles-of-polygons/sssss14f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-angles-of-polygons/sssss14f"/>
      <lastmod>2026-11-02T16:56:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/measuring-angles-of-polygons/sssss14f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-angles-of-polygons/sssss14f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-angles-of-polygons/sssss14f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-angles-of-polygons/sssss14f"/>
      <lastmod>2026-11-02T16:56:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-an-angle-by-erell-germia/sssss148</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-an-angle-by-erell-germia/sssss148"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-an-angle-by-erell-germia/sssss148"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-an-angle-by-erell-germia/sssss148"/>
      <lastmod>2026-11-01T21:26:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-an-angle-by-erell-germia/sssss148</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-an-angle-by-erell-germia/sssss148"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-an-angle-by-erell-germia/sssss148"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-an-angle-by-erell-germia/sssss148"/>
      <lastmod>2026-11-01T21:26:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-cosines-proof-by-sook-campanelli/sssss14u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-cosines-proof-by-sook-campanelli/sssss14u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-cosines-proof-by-sook-campanelli/sssss14u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-cosines-proof-by-sook-campanelli/sssss14u"/>
      <lastmod>2026-11-02T18:11:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-cosines-proof-by-sook-campanelli/sssss14u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-cosines-proof-by-sook-campanelli/sssss14u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-cosines-proof-by-sook-campanelli/sssss14u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-cosines-proof-by-sook-campanelli/sssss14u"/>
      <lastmod>2026-11-02T18:11:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-by-brian-pederson/sssss145</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-brian-pederson/sssss145"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-brian-pederson/sssss145"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-brian-pederson/sssss145"/>
      <lastmod>2026-11-02T15:03:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-by-brian-pederson/sssss145</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-brian-pederson/sssss145"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-brian-pederson/sssss145"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-brian-pederson/sssss145"/>
      <lastmod>2026-11-02T15:03:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-properties-of-right-triangles/sssss14b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-properties-of-right-triangles/sssss14b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-properties-of-right-triangles/sssss14b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-properties-of-right-triangles/sssss14b"/>
      <lastmod>2026-11-02T12:20:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-properties-of-right-triangles/sssss14b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-properties-of-right-triangles/sssss14b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-properties-of-right-triangles/sssss14b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-properties-of-right-triangles/sssss14b"/>
      <lastmod>2026-11-02T12:20:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-by-jun-carl-alenton/sssss143</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-jun-carl-alenton/sssss143"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-jun-carl-alenton/sssss143"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-jun-carl-alenton/sssss143"/>
      <lastmod>2026-11-02T11:47:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-by-jun-carl-alenton/sssss143</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-jun-carl-alenton/sssss143"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-jun-carl-alenton/sssss143"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-jun-carl-alenton/sssss143"/>
      <lastmod>2026-11-02T11:47:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-exterior-angles-dynamic-demonstration/sssss14q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-dynamic-demonstration/sssss14q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-exterior-angles-dynamic-demonstration/sssss14q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-dynamic-demonstration/sssss14q"/>
      <lastmod>2026-11-02T17:44:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-exterior-angles-dynamic-demonstration/sssss14q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-dynamic-demonstration/sssss14q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-exterior-angles-dynamic-demonstration/sssss14q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-dynamic-demonstration/sssss14q"/>
      <lastmod>2026-11-02T17:44:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/minimize-perimeter-dynamic-optimization-with-similar-triangles/sssss141</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/minimize-perimeter-dynamic-optimization-with-similar-triangles/sssss141"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/minimize-perimeter-dynamic-optimization-with-similar-triangles/sssss141"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/minimize-perimeter-dynamic-optimization-with-similar-triangles/sssss141"/>
      <lastmod>2026-11-02T18:49:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/minimize-perimeter-dynamic-optimization-with-similar-triangles/sssss141</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/minimize-perimeter-dynamic-optimization-with-similar-triangles/sssss141"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/minimize-perimeter-dynamic-optimization-with-similar-triangles/sssss141"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/minimize-perimeter-dynamic-optimization-with-similar-triangles/sssss141"/>
      <lastmod>2026-11-02T18:49:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/r-cord-function/sssss14m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/r-cord-function/sssss14m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/r-cord-function/sssss14m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/r-cord-function/sssss14m"/>
      <lastmod>2026-11-01T23:35:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/r-cord-function/sssss14m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/r-cord-function/sssss14m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/r-cord-function/sssss14m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/r-cord-function/sssss14m"/>
      <lastmod>2026-11-01T23:35:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-property-of-the-regular-heptagon/sssss14j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-property-of-the-regular-heptagon/sssss14j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-property-of-the-regular-heptagon/sssss14j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-property-of-the-regular-heptagon/sssss14j"/>
      <lastmod>2026-11-02T16:46:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-property-of-the-regular-heptagon/sssss14j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-property-of-the-regular-heptagon/sssss14j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-property-of-the-regular-heptagon/sssss14j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-property-of-the-regular-heptagon/sssss14j"/>
      <lastmod>2026-11-02T16:46:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-in-a-sphere-construction/sssss14p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-in-a-sphere-construction/sssss14p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-in-a-sphere-construction/sssss14p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-in-a-sphere-construction/sssss14p"/>
      <lastmod>2026-11-02T18:12:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-in-a-sphere-construction/sssss14p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-in-a-sphere-construction/sssss14p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-in-a-sphere-construction/sssss14p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-in-a-sphere-construction/sssss14p"/>
      <lastmod>2026-11-02T18:12:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/canis-major-geometric-construction/sssss14w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/canis-major-geometric-construction/sssss14w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/canis-major-geometric-construction/sssss14w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/canis-major-geometric-construction/sssss14w"/>
      <lastmod>2026-11-01T20:58:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/canis-major-geometric-construction/sssss14w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/canis-major-geometric-construction/sssss14w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/canis-major-geometric-construction/sssss14w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/canis-major-geometric-construction/sssss14w"/>
      <lastmod>2026-11-01T20:58:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/stereographic-projection-of-circles-on-riemann-sphere/sssss146</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stereographic-projection-of-circles-on-riemann-sphere/sssss146"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stereographic-projection-of-circles-on-riemann-sphere/sssss146"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stereographic-projection-of-circles-on-riemann-sphere/sssss146"/>
      <lastmod>2026-11-02T17:59:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/stereographic-projection-of-circles-on-riemann-sphere/sssss146</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stereographic-projection-of-circles-on-riemann-sphere/sssss146"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stereographic-projection-of-circles-on-riemann-sphere/sssss146"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stereographic-projection-of-circles-on-riemann-sphere/sssss146"/>
      <lastmod>2026-11-02T17:59:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-consecutive-reflections-in-parallel-axes/sssss14g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-consecutive-reflections-in-parallel-axes/sssss14g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-consecutive-reflections-in-parallel-axes/sssss14g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-consecutive-reflections-in-parallel-axes/sssss14g"/>
      <lastmod>2026-11-02T13:06:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-consecutive-reflections-in-parallel-axes/sssss14g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-consecutive-reflections-in-parallel-axes/sssss14g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-consecutive-reflections-in-parallel-axes/sssss14g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-consecutive-reflections-in-parallel-axes/sssss14g"/>
      <lastmod>2026-11-02T13:06:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proving-circle-theorem-with-two-isosceles-triangles/sssss149</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-circle-theorem-with-two-isosceles-triangles/sssss149"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-circle-theorem-with-two-isosceles-triangles/sssss149"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-circle-theorem-with-two-isosceles-triangles/sssss149"/>
      <lastmod>2026-11-02T00:41:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proving-circle-theorem-with-two-isosceles-triangles/sssss149</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-circle-theorem-with-two-isosceles-triangles/sssss149"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-circle-theorem-with-two-isosceles-triangles/sssss149"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-circle-theorem-with-two-isosceles-triangles/sssss149"/>
      <lastmod>2026-11-02T00:41:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-based-on-base/sssss14e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-based-on-base/sssss14e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-based-on-base/sssss14e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-based-on-base/sssss14e"/>
      <lastmod>2026-11-02T17:48:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-based-on-base/sssss14e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-based-on-base/sssss14e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-based-on-base/sssss14e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-based-on-base/sssss14e"/>
      <lastmod>2026-11-02T17:48:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/system-of-3-equations-point-intersection/sssss14v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-3-equations-point-intersection/sssss14v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-3-equations-point-intersection/sssss14v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-3-equations-point-intersection/sssss14v"/>
      <lastmod>2026-11-02T02:34:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/system-of-3-equations-point-intersection/sssss14v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-3-equations-point-intersection/sssss14v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-3-equations-point-intersection/sssss14v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-3-equations-point-intersection/sssss14v"/>
      <lastmod>2026-11-02T02:34:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tidal-accelerations-along-earth-moon-line/sssss144</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tidal-accelerations-along-earth-moon-line/sssss144"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tidal-accelerations-along-earth-moon-line/sssss144"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tidal-accelerations-along-earth-moon-line/sssss144"/>
      <lastmod>2026-11-01T20:59:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tidal-accelerations-along-earth-moon-line/sssss144</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tidal-accelerations-along-earth-moon-line/sssss144"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tidal-accelerations-along-earth-moon-line/sssss144"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tidal-accelerations-along-earth-moon-line/sssss144"/>
      <lastmod>2026-11-01T20:59:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-icosahedron-average-vertex-distance-vs-truncation-parameter-and-extre/sssss14l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-icosahedron-average-vertex-distance-vs-truncation-parameter-and-extre/sssss14l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-icosahedron-average-vertex-distance-vs-truncation-parameter-and-extre/sssss14l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-icosahedron-average-vertex-distance-vs-truncation-parameter-and-extre/sssss14l"/>
      <lastmod>2026-11-01T19:28:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-icosahedron-average-vertex-distance-vs-truncation-parameter-and-extre/sssss14l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-icosahedron-average-vertex-distance-vs-truncation-parameter-and-extre/sssss14l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-icosahedron-average-vertex-distance-vs-truncation-parameter-and-extre/sssss14l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-icosahedron-average-vertex-distance-vs-truncation-parameter-and-extre/sssss14l"/>
      <lastmod>2026-11-01T19:28:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-rose-curves-r-a-cos-b-and-r-a-sin-b-with-dynamic-construction/sssss14y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-rose-curves-r-a-cos-b-and-r-a-sin-b-with-dynamic-construction/sssss14y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-rose-curves-r-a-cos-b-and-r-a-sin-b-with-dynamic-construction/sssss14y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-rose-curves-r-a-cos-b-and-r-a-sin-b-with-dynamic-construction/sssss14y"/>
      <lastmod>2026-11-01T20:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-rose-curves-r-a-cos-b-and-r-a-sin-b-with-dynamic-construction/sssss14y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-rose-curves-r-a-cos-b-and-r-a-sin-b-with-dynamic-construction/sssss14y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-rose-curves-r-a-cos-b-and-r-a-sin-b-with-dynamic-construction/sssss14y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-rose-curves-r-a-cos-b-and-r-a-sin-b-with-dynamic-construction/sssss14y"/>
      <lastmod>2026-11-01T20:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-a-line-segment-and-a-plane/sssss14a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-a-line-segment-and-a-plane/sssss14a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-a-line-segment-and-a-plane/sssss14a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-a-line-segment-and-a-plane/sssss14a"/>
      <lastmod>2026-11-02T15:41:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-a-line-segment-and-a-plane/sssss14a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-a-line-segment-and-a-plane/sssss14a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-a-line-segment-and-a-plane/sssss14a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-a-line-segment-and-a-plane/sssss14a"/>
      <lastmod>2026-11-02T15:41:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-fractal/sssss14c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-fractal/sssss14c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-fractal/sssss14c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-fractal/sssss14c"/>
      <lastmod>2026-11-01T21:19:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-fractal/sssss14c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-fractal/sssss14c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-fractal/sssss14c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-fractal/sssss14c"/>
      <lastmod>2026-11-01T21:19:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-simultaneous-equations/sssss14r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-simultaneous-equations/sssss14r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-simultaneous-equations/sssss14r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-simultaneous-equations/sssss14r"/>
      <lastmod>2026-11-02T17:45:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-simultaneous-equations/sssss14r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-simultaneous-equations/sssss14r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-simultaneous-equations/sssss14r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-simultaneous-equations/sssss14r"/>
      <lastmod>2026-11-02T17:45:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-construction-and-geometry-demo/sssss14h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-and-geometry-demo/sssss14h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-and-geometry-demo/sssss14h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-and-geometry-demo/sssss14h"/>
      <lastmod>2026-11-02T18:19:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-construction-and-geometry-demo/sssss14h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-and-geometry-demo/sssss14h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-and-geometry-demo/sssss14h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-and-geometry-demo/sssss14h"/>
      <lastmod>2026-11-02T18:19:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-the-binomial-to-the-normal-approximation/sssss14t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-the-binomial-to-the-normal-approximation/sssss14t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-the-binomial-to-the-normal-approximation/sssss14t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-the-binomial-to-the-normal-approximation/sssss14t"/>
      <lastmod>2026-11-02T18:00:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-the-binomial-to-the-normal-approximation/sssss14t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-the-binomial-to-the-normal-approximation/sssss14t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-the-binomial-to-the-normal-approximation/sssss14t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-the-binomial-to-the-normal-approximation/sssss14t"/>
      <lastmod>2026-11-02T18:00:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-transformations-demo/sssss14x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-transformations-demo/sssss14x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-transformations-demo/sssss14x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-transformations-demo/sssss14x"/>
      <lastmod>2026-11-02T13:33:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-transformations-demo/sssss14x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-transformations-demo/sssss14x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-transformations-demo/sssss14x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-transformations-demo/sssss14x"/>
      <lastmod>2026-11-02T13:33:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-triangle-inequalities/sssss14i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-triangle-inequalities/sssss14i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-triangle-inequalities/sssss14i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-triangle-inequalities/sssss14i"/>
      <lastmod>2026-11-01T19:04:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-triangle-inequalities/sssss14i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-triangle-inequalities/sssss14i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-triangle-inequalities/sssss14i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-triangle-inequalities/sssss14i"/>
      <lastmod>2026-11-01T19:04:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-and-incircle-geometric-construction/sssss14o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-incircle-geometric-construction/sssss14o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-incircle-geometric-construction/sssss14o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-incircle-geometric-construction/sssss14o"/>
      <lastmod>2026-11-02T18:51:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-and-incircle-geometric-construction/sssss14o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-incircle-geometric-construction/sssss14o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-incircle-geometric-construction/sssss14o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-incircle-geometric-construction/sssss14o"/>
      <lastmod>2026-11-02T18:51:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prof-stick-explores-vectors-resolution/sssss1ls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prof-stick-explores-vectors-resolution/sssss1ls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prof-stick-explores-vectors-resolution/sssss1ls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prof-stick-explores-vectors-resolution/sssss1ls"/>
      <lastmod>2026-11-02T17:45:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prof-stick-explores-vectors-resolution/sssss1ls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prof-stick-explores-vectors-resolution/sssss1ls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prof-stick-explores-vectors-resolution/sssss1ls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prof-stick-explores-vectors-resolution/sssss1ls"/>
      <lastmod>2026-11-02T17:45:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone-by-dan-dale/sssss1l7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-dan-dale/sssss1l7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by-dan-dale/sssss1l7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-dan-dale/sssss1l7"/>
      <lastmod>2026-11-01T21:41:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cone-by-dan-dale/sssss1l7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-dan-dale/sssss1l7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by-dan-dale/sssss1l7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-dan-dale/sssss1l7"/>
      <lastmod>2026-11-01T21:41:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/why-are-the-vertices-important-in-linear-programming/sssss1ln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/why-are-the-vertices-important-in-linear-programming/sssss1ln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/why-are-the-vertices-important-in-linear-programming/sssss1ln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/why-are-the-vertices-important-in-linear-programming/sssss1ln"/>
      <lastmod>2026-11-02T18:38:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/why-are-the-vertices-important-in-linear-programming/sssss1ln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/why-are-the-vertices-important-in-linear-programming/sssss1ln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/why-are-the-vertices-important-in-linear-programming/sssss1ln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/why-are-the-vertices-important-in-linear-programming/sssss1ln"/>
      <lastmod>2026-11-02T18:38:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-2-ssssskx7/sssss1l2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-2-ssssskx7/sssss1l2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-2-ssssskx7/sssss1l2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-2-ssssskx7/sssss1l2"/>
      <lastmod>2026-11-02T03:11:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-2-ssssskx7/sssss1l2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-2-ssssskx7/sssss1l2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-2-ssssskx7/sssss1l2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-2-ssssskx7/sssss1l2"/>
      <lastmod>2026-11-02T03:11:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-an-isosceles-triangle-and-measuring-its-perimeter/sssss1lk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-an-isosceles-triangle-and-measuring-its-perimeter/sssss1lk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-an-isosceles-triangle-and-measuring-its-perimeter/sssss1lk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-an-isosceles-triangle-and-measuring-its-perimeter/sssss1lk"/>
      <lastmod>2026-11-02T06:45:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-an-isosceles-triangle-and-measuring-its-perimeter/sssss1lk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-an-isosceles-triangle-and-measuring-its-perimeter/sssss1lk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-an-isosceles-triangle-and-measuring-its-perimeter/sssss1lk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-an-isosceles-triangle-and-measuring-its-perimeter/sssss1lk"/>
      <lastmod>2026-11-02T06:45:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-multiplication-and-geometric-construction-example/sssss1lz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-and-geometric-construction-example/sssss1lz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-and-geometric-construction-example/sssss1lz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-and-geometric-construction-example/sssss1lz"/>
      <lastmod>2026-11-02T02:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-multiplication-and-geometric-construction-example/sssss1lz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-and-geometric-construction-example/sssss1lz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-and-geometric-construction-example/sssss1lz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-and-geometric-construction-example/sssss1lz"/>
      <lastmod>2026-11-02T02:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plot-parabola-and-line/sssss1l0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plot-parabola-and-line/sssss1l0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plot-parabola-and-line/sssss1l0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plot-parabola-and-line/sssss1l0"/>
      <lastmod>2026-11-02T17:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plot-parabola-and-line/sssss1l0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plot-parabola-and-line/sssss1l0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plot-parabola-and-line/sssss1l0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plot-parabola-and-line/sssss1l0"/>
      <lastmod>2026-11-02T17:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-geogebra-demo/sssss1ld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-geogebra-demo/sssss1ld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-geogebra-demo/sssss1ld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-geogebra-demo/sssss1ld"/>
      <lastmod>2026-11-02T17:40:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-geogebra-demo/sssss1ld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-geogebra-demo/sssss1ld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-geogebra-demo/sssss1ld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-geogebra-demo/sssss1ld"/>
      <lastmod>2026-11-02T17:40:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-spirals-four-interlocking-spirals-from-nested-rotated-squares/sssss1lf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-spirals-four-interlocking-spirals-from-nested-rotated-squares/sssss1lf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-spirals-four-interlocking-spirals-from-nested-rotated-squares/sssss1lf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-spirals-four-interlocking-spirals-from-nested-rotated-squares/sssss1lf"/>
      <lastmod>2026-11-01T19:22:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-spirals-four-interlocking-spirals-from-nested-rotated-squares/sssss1lf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-spirals-four-interlocking-spirals-from-nested-rotated-squares/sssss1lf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-spirals-four-interlocking-spirals-from-nested-rotated-squares/sssss1lf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-spirals-four-interlocking-spirals-from-nested-rotated-squares/sssss1lf"/>
      <lastmod>2026-11-01T19:22:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-cosines-investigation/sssss1l8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-cosines-investigation/sssss1l8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-cosines-investigation/sssss1l8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-cosines-investigation/sssss1l8"/>
      <lastmod>2026-11-02T18:17:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-cosines-investigation/sssss1l8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-cosines-investigation/sssss1l8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-cosines-investigation/sssss1l8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-cosines-investigation/sssss1l8"/>
      <lastmod>2026-11-02T18:17:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phase-plane/sssss1lu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phase-plane/sssss1lu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phase-plane/sssss1lu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phase-plane/sssss1lu"/>
      <lastmod>2026-11-01T19:31:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phase-plane/sssss1lu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phase-plane/sssss1lu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phase-plane/sssss1lu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phase-plane/sssss1lu"/>
      <lastmod>2026-11-01T19:31:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-tangent-graph-by-andy-greasley/sssss1l5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-tangent-graph-by-andy-greasley/sssss1l5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-tangent-graph-by-andy-greasley/sssss1l5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-tangent-graph-by-andy-greasley/sssss1l5"/>
      <lastmod>2026-11-02T16:44:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-tangent-graph-by-andy-greasley/sssss1l5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-tangent-graph-by-andy-greasley/sssss1l5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-tangent-graph-by-andy-greasley/sssss1l5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-tangent-graph-by-andy-greasley/sssss1l5"/>
      <lastmod>2026-11-02T16:44:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-aas-saa-congruence/sssss1lb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-aas-saa-congruence/sssss1lb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-aas-saa-congruence/sssss1lb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-aas-saa-congruence/sssss1lb"/>
      <lastmod>2026-11-02T02:56:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-aas-saa-congruence/sssss1lb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-aas-saa-congruence/sssss1lb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-aas-saa-congruence/sssss1lb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-aas-saa-congruence/sssss1lb"/>
      <lastmod>2026-11-02T02:56:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/center-and-spread-exploration/sssss1l3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-and-spread-exploration/sssss1l3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-and-spread-exploration/sssss1l3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-and-spread-exploration/sssss1l3"/>
      <lastmod>2026-11-02T13:43:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/center-and-spread-exploration/sssss1l3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-and-spread-exploration/sssss1l3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-and-spread-exploration/sssss1l3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-and-spread-exploration/sssss1l3"/>
      <lastmod>2026-11-02T13:43:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-division-with-unit-length/sssss1lq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-division-with-unit-length/sssss1lq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-division-with-unit-length/sssss1lq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-division-with-unit-length/sssss1lq"/>
      <lastmod>2026-11-02T18:02:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-division-with-unit-length/sssss1lq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-division-with-unit-length/sssss1lq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-division-with-unit-length/sssss1lq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-division-with-unit-length/sssss1lq"/>
      <lastmod>2026-11-02T18:02:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization-by-david-wees/sssss1l1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization-by-david-wees/sssss1l1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-and-distribution-visualization-by-david-wees/sssss1l1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization-by-david-wees/sssss1l1"/>
      <lastmod>2026-11-02T16:33:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-deviation-and-distribution-visualization-by-david-wees/sssss1l1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization-by-david-wees/sssss1l1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-and-distribution-visualization-by-david-wees/sssss1l1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization-by-david-wees/sssss1l1"/>
      <lastmod>2026-11-02T16:33:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-activity/sssss1lm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-activity/sssss1lm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-activity/sssss1lm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-activity/sssss1lm"/>
      <lastmod>2026-11-01T19:00:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-activity/sssss1lm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-activity/sssss1lm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-activity/sssss1lm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-activity/sssss1lm"/>
      <lastmod>2026-11-01T19:00:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-sphere-for-asymptotic-graphs/sssss1lj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sphere-for-asymptotic-graphs/sssss1lj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sphere-for-asymptotic-graphs/sssss1lj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sphere-for-asymptotic-graphs/sssss1lj"/>
      <lastmod>2026-11-02T09:42:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-sphere-for-asymptotic-graphs/sssss1lj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sphere-for-asymptotic-graphs/sssss1lj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sphere-for-asymptotic-graphs/sssss1lj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sphere-for-asymptotic-graphs/sssss1lj"/>
      <lastmod>2026-11-02T09:42:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-law-demonstration-by-stacie-down-torres/sssss1lp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-law-demonstration-by-stacie-down-torres/sssss1lp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-law-demonstration-by-stacie-down-torres/sssss1lp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-law-demonstration-by-stacie-down-torres/sssss1lp"/>
      <lastmod>2026-11-02T14:58:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-law-demonstration-by-stacie-down-torres/sssss1lp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-law-demonstration-by-stacie-down-torres/sssss1lp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-law-demonstration-by-stacie-down-torres/sssss1lp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-law-demonstration-by-stacie-down-torres/sssss1lp"/>
      <lastmod>2026-11-02T14:58:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoids/sssss1lw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoids/sssss1lw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoids/sssss1lw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoids/sssss1lw"/>
      <lastmod>2026-11-01T23:56:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoids/sssss1lw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoids/sssss1lw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoids/sssss1lw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoids/sssss1lw"/>
      <lastmod>2026-11-01T23:56:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-to-a-segment-through-a-non-collinear-point-by-mdiener/sssss1l6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-to-a-segment-through-a-non-collinear-point-by-mdiener/sssss1l6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-to-a-segment-through-a-non-collinear-point-by-mdiener/sssss1l6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-to-a-segment-through-a-non-collinear-point-by-mdiener/sssss1l6"/>
      <lastmod>2026-11-02T18:41:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-to-a-segment-through-a-non-collinear-point-by-mdiener/sssss1l6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-to-a-segment-through-a-non-collinear-point-by-mdiener/sssss1l6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-to-a-segment-through-a-non-collinear-point-by-mdiener/sssss1l6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-to-a-segment-through-a-non-collinear-point-by-mdiener/sssss1l6"/>
      <lastmod>2026-11-02T18:41:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/characteristics-of-a-parabola/sssss1lg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/characteristics-of-a-parabola/sssss1lg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/characteristics-of-a-parabola/sssss1lg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/characteristics-of-a-parabola/sssss1lg"/>
      <lastmod>2026-11-02T18:10:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/characteristics-of-a-parabola/sssss1lg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/characteristics-of-a-parabola/sssss1lg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/characteristics-of-a-parabola/sssss1lg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/characteristics-of-a-parabola/sssss1lg"/>
      <lastmod>2026-11-02T18:10:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cutting-a-cube/sssss1l9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cutting-a-cube/sssss1l9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cutting-a-cube/sssss1l9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cutting-a-cube/sssss1l9"/>
      <lastmod>2026-11-01T22:00:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cutting-a-cube/sssss1l9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cutting-a-cube/sssss1l9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cutting-a-cube/sssss1l9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cutting-a-cube/sssss1l9"/>
      <lastmod>2026-11-01T22:00:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-walk-on-a-unit-sphere/sssss1le</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-walk-on-a-unit-sphere/sssss1le"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-walk-on-a-unit-sphere/sssss1le"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-walk-on-a-unit-sphere/sssss1le"/>
      <lastmod>2026-11-02T16:50:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-walk-on-a-unit-sphere/sssss1le</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-walk-on-a-unit-sphere/sssss1le"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-walk-on-a-unit-sphere/sssss1le"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-walk-on-a-unit-sphere/sssss1le"/>
      <lastmod>2026-11-02T16:50:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-intersection-visualization/sssss1lv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-intersection-visualization/sssss1lv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-intersection-visualization/sssss1lv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-intersection-visualization/sssss1lv"/>
      <lastmod>2026-11-02T06:11:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-intersection-visualization/sssss1lv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-intersection-visualization/sssss1lv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-intersection-visualization/sssss1lv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-intersection-visualization/sssss1lv"/>
      <lastmod>2026-11-02T06:11:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/size-of-square-roots/sssss1l4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/size-of-square-roots/sssss1l4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/size-of-square-roots/sssss1l4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/size-of-square-roots/sssss1l4"/>
      <lastmod>2026-11-02T02:21:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/size-of-square-roots/sssss1l4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/size-of-square-roots/sssss1l4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/size-of-square-roots/sssss1l4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/size-of-square-roots/sssss1l4"/>
      <lastmod>2026-11-02T02:21:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-mean/sssss1ll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-mean/sssss1ll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-mean/sssss1ll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-mean/sssss1ll"/>
      <lastmod>2026-11-01T21:37:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-mean/sssss1ll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-mean/sssss1ll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-mean/sssss1ll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-mean/sssss1ll"/>
      <lastmod>2026-11-01T21:37:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometry-with-unit-circle/sssss1ly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometry-with-unit-circle/sssss1ly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometry-with-unit-circle/sssss1ly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometry-with-unit-circle/sssss1ly"/>
      <lastmod>2026-11-02T17:13:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometry-with-unit-circle/sssss1ly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometry-with-unit-circle/sssss1ly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometry-with-unit-circle/sssss1ly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometry-with-unit-circle/sssss1ly"/>
      <lastmod>2026-11-02T17:13:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/newton-secant-method-demonstration/sssss1la</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/newton-secant-method-demonstration/sssss1la"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/newton-secant-method-demonstration/sssss1la"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/newton-secant-method-demonstration/sssss1la"/>
      <lastmod>2026-11-02T16:57:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/newton-secant-method-demonstration/sssss1la</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/newton-secant-method-demonstration/sssss1la"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/newton-secant-method-demonstration/sssss1la"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/newton-secant-method-demonstration/sssss1la"/>
      <lastmod>2026-11-02T16:57:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-pyramids-construction/sssss1lc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-pyramids-construction/sssss1lc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-pyramids-construction/sssss1lc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-pyramids-construction/sssss1lc"/>
      <lastmod>2026-11-01T21:24:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-pyramids-construction/sssss1lc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-pyramids-construction/sssss1lc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-pyramids-construction/sssss1lc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-pyramids-construction/sssss1lc"/>
      <lastmod>2026-11-01T21:24:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-reflection-line/sssss1lr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-reflection-line/sssss1lr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-reflection-line/sssss1lr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-reflection-line/sssss1lr"/>
      <lastmod>2026-11-02T17:47:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-reflection-line/sssss1lr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-reflection-line/sssss1lr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-reflection-line/sssss1lr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-reflection-line/sssss1lr"/>
      <lastmod>2026-11-02T17:47:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-graphs-7/sssss1lh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphs-7/sssss1lh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphs-7/sssss1lh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphs-7/sssss1lh"/>
      <lastmod>2026-11-01T21:21:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-graphs-7/sssss1lh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphs-7/sssss1lh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphs-7/sssss1lh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphs-7/sssss1lh"/>
      <lastmod>2026-11-01T21:21:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-math-problem-parallelogram-and-cosine-function-construction/sssss1lt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-math-problem-parallelogram-and-cosine-function-construction/sssss1lt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-math-problem-parallelogram-and-cosine-function-construction/sssss1lt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-math-problem-parallelogram-and-cosine-function-construction/sssss1lt"/>
      <lastmod>2026-11-02T02:24:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-math-problem-parallelogram-and-cosine-function-construction/sssss1lt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-math-problem-parallelogram-and-cosine-function-construction/sssss1lt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-math-problem-parallelogram-and-cosine-function-construction/sssss1lt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-math-problem-parallelogram-and-cosine-function-construction/sssss1lt"/>
      <lastmod>2026-11-02T02:24:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-anthonank-2/sssss1lx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-anthonank-2/sssss1lx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-anthonank-2/sssss1lx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-anthonank-2/sssss1lx"/>
      <lastmod>2026-11-02T18:40:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-anthonank-2/sssss1lx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-anthonank-2/sssss1lx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-anthonank-2/sssss1lx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-anthonank-2/sssss1lx"/>
      <lastmod>2026-11-02T18:40:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-regular-polygon-definition/sssss1li</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-regular-polygon-definition/sssss1li"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-regular-polygon-definition/sssss1li"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-regular-polygon-definition/sssss1li"/>
      <lastmod>2026-11-01T23:50:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-regular-polygon-definition/sssss1li</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-regular-polygon-definition/sssss1li"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-regular-polygon-definition/sssss1li"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-regular-polygon-definition/sssss1li"/>
      <lastmod>2026-11-01T23:50:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-and-normal-distributions-same-mean/sssss1lo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-and-normal-distributions-same-mean/sssss1lo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-and-normal-distributions-same-mean/sssss1lo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-and-normal-distributions-same-mean/sssss1lo"/>
      <lastmod>2026-11-01T21:30:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-and-normal-distributions-same-mean/sssss1lo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-and-normal-distributions-same-mean/sssss1lo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-and-normal-distributions-same-mean/sssss1lo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-and-normal-distributions-same-mean/sssss1lo"/>
      <lastmod>2026-11-01T21:30:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-translation/sssss1ys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-translation/sssss1ys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-translation/sssss1ys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-translation/sssss1ys"/>
      <lastmod>2026-11-02T13:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-translation/sssss1ys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-translation/sssss1ys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-translation/sssss1ys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-translation/sssss1ys"/>
      <lastmod>2026-11-02T13:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-rectangles-on-a-coordinate-grid/sssss1y7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-rectangles-on-a-coordinate-grid/sssss1y7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-rectangles-on-a-coordinate-grid/sssss1y7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-rectangles-on-a-coordinate-grid/sssss1y7"/>
      <lastmod>2026-11-02T02:22:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-rectangles-on-a-coordinate-grid/sssss1y7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-rectangles-on-a-coordinate-grid/sssss1y7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-rectangles-on-a-coordinate-grid/sssss1y7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-rectangles-on-a-coordinate-grid/sssss1y7"/>
      <lastmod>2026-11-02T02:22:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/minor-vs-major-arc/sssss1yn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/minor-vs-major-arc/sssss1yn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/minor-vs-major-arc/sssss1yn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/minor-vs-major-arc/sssss1yn"/>
      <lastmod>2026-11-01T19:07:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/minor-vs-major-arc/sssss1yn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/minor-vs-major-arc/sssss1yn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/minor-vs-major-arc/sssss1yn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/minor-vs-major-arc/sssss1yn"/>
      <lastmod>2026-11-01T19:07:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/significant-figures-self-review/sssss1y2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/significant-figures-self-review/sssss1y2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/significant-figures-self-review/sssss1y2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/significant-figures-self-review/sssss1y2"/>
      <lastmod>2026-11-01T19:05:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/significant-figures-self-review/sssss1y2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/significant-figures-self-review/sssss1y2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/significant-figures-self-review/sssss1y2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/significant-figures-self-review/sssss1y2"/>
      <lastmod>2026-11-01T19:05:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-of-sine-and-cosine-waves/sssss1yk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-sine-and-cosine-waves/sssss1yk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-sine-and-cosine-waves/sssss1yk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-sine-and-cosine-waves/sssss1yk"/>
      <lastmod>2026-11-02T00:44:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-of-sine-and-cosine-waves/sssss1yk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-sine-and-cosine-waves/sssss1yk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-sine-and-cosine-waves/sssss1yk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-sine-and-cosine-waves/sssss1yk"/>
      <lastmod>2026-11-02T00:44:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dividing-a-fraction-by-a-fraction-geometrically/sssss1yz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-a-fraction-by-a-fraction-geometrically/sssss1yz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-a-fraction-by-a-fraction-geometrically/sssss1yz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-a-fraction-by-a-fraction-geometrically/sssss1yz"/>
      <lastmod>2026-11-02T10:43:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dividing-a-fraction-by-a-fraction-geometrically/sssss1yz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-a-fraction-by-a-fraction-geometrically/sssss1yz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-a-fraction-by-a-fraction-geometrically/sssss1yz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-a-fraction-by-a-fraction-geometrically/sssss1yz"/>
      <lastmod>2026-11-02T10:43:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubic-tangents-through-roots/sssss1y0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-tangents-through-roots/sssss1y0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-tangents-through-roots/sssss1y0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-tangents-through-roots/sssss1y0"/>
      <lastmod>2026-11-02T16:53:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubic-tangents-through-roots/sssss1y0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-tangents-through-roots/sssss1y0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-tangents-through-roots/sssss1y0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-tangents-through-roots/sssss1y0"/>
      <lastmod>2026-11-02T16:53:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagoras-theorem-rectangle-and-parallelogram/sssss1yd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-rectangle-and-parallelogram/sssss1yd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-theorem-rectangle-and-parallelogram/sssss1yd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-rectangle-and-parallelogram/sssss1yd"/>
      <lastmod>2026-11-02T10:50:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagoras-theorem-rectangle-and-parallelogram/sssss1yd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-rectangle-and-parallelogram/sssss1yd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-theorem-rectangle-and-parallelogram/sssss1yd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-rectangle-and-parallelogram/sssss1yd"/>
      <lastmod>2026-11-02T10:50:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/torus-construction/sssss1yf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/torus-construction/sssss1yf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/torus-construction/sssss1yf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/torus-construction/sssss1yf"/>
      <lastmod>2026-11-02T00:28:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/torus-construction/sssss1yf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/torus-construction/sssss1yf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/torus-construction/sssss1yf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/torus-construction/sssss1yf"/>
      <lastmod>2026-11-02T00:28:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-function-vertex-form-quiz-a-1/sssss1y8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-vertex-form-quiz-a-1/sssss1y8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-vertex-form-quiz-a-1/sssss1y8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-vertex-form-quiz-a-1/sssss1y8"/>
      <lastmod>2026-11-01T21:14:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-function-vertex-form-quiz-a-1/sssss1y8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-vertex-form-quiz-a-1/sssss1y8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-vertex-form-quiz-a-1/sssss1y8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-vertex-form-quiz-a-1/sssss1y8"/>
      <lastmod>2026-11-01T21:14:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-logarithm-power-property/sssss1yu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-logarithm-power-property/sssss1yu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-logarithm-power-property/sssss1yu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-logarithm-power-property/sssss1yu"/>
      <lastmod>2026-11-02T17:00:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-logarithm-power-property/sssss1yu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-logarithm-power-property/sssss1yu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-logarithm-power-property/sssss1yu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-logarithm-power-property/sssss1yu"/>
      <lastmod>2026-11-02T17:00:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hat-shape-bar-chart/sssss1y5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hat-shape-bar-chart/sssss1y5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hat-shape-bar-chart/sssss1y5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hat-shape-bar-chart/sssss1y5"/>
      <lastmod>2026-11-02T18:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hat-shape-bar-chart/sssss1y5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hat-shape-bar-chart/sssss1y5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hat-shape-bar-chart/sssss1y5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hat-shape-bar-chart/sssss1y5"/>
      <lastmod>2026-11-02T18:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gradient-function-of-logarithmic-functions-dynamic-derivative-visualization/sssss1yb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-function-of-logarithmic-functions-dynamic-derivative-visualization/sssss1yb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-function-of-logarithmic-functions-dynamic-derivative-visualization/sssss1yb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-function-of-logarithmic-functions-dynamic-derivative-visualization/sssss1yb"/>
      <lastmod>2026-11-01T19:03:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gradient-function-of-logarithmic-functions-dynamic-derivative-visualization/sssss1yb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-function-of-logarithmic-functions-dynamic-derivative-visualization/sssss1yb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-function-of-logarithmic-functions-dynamic-derivative-visualization/sssss1yb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-function-of-logarithmic-functions-dynamic-derivative-visualization/sssss1yb"/>
      <lastmod>2026-11-01T19:03:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-construction-by-christian-dean/sssss1y3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-construction-by-christian-dean/sssss1y3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-construction-by-christian-dean/sssss1y3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-construction-by-christian-dean/sssss1y3"/>
      <lastmod>2026-11-01T23:39:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-construction-by-christian-dean/sssss1y3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-construction-by-christian-dean/sssss1y3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-construction-by-christian-dean/sssss1y3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-construction-by-christian-dean/sssss1y3"/>
      <lastmod>2026-11-01T23:39:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-figures-and-scale-factor/sssss1yq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-figures-and-scale-factor/sssss1yq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-figures-and-scale-factor/sssss1yq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-figures-and-scale-factor/sssss1yq"/>
      <lastmod>2026-11-01T21:27:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-figures-and-scale-factor/sssss1yq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-figures-and-scale-factor/sssss1yq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-figures-and-scale-factor/sssss1yq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-figures-and-scale-factor/sssss1yq"/>
      <lastmod>2026-11-01T21:27:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ed-s-squares/sssss1y1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ed-s-squares/sssss1y1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ed-s-squares/sssss1y1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ed-s-squares/sssss1y1"/>
      <lastmod>2026-11-02T09:08:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ed-s-squares/sssss1y1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ed-s-squares/sssss1y1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ed-s-squares/sssss1y1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ed-s-squares/sssss1y1"/>
      <lastmod>2026-11-02T09:08:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-zeros-and-axis-intersections-examination/sssss1ym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-zeros-and-axis-intersections-examination/sssss1ym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-zeros-and-axis-intersections-examination/sssss1ym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-zeros-and-axis-intersections-examination/sssss1ym"/>
      <lastmod>2026-11-02T17:47:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-zeros-and-axis-intersections-examination/sssss1ym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-zeros-and-axis-intersections-examination/sssss1ym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-zeros-and-axis-intersections-examination/sssss1ym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-zeros-and-axis-intersections-examination/sssss1ym"/>
      <lastmod>2026-11-02T17:47:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-pyramid/sssss1yj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-pyramid/sssss1yj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-pyramid/sssss1yj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-pyramid/sssss1yj"/>
      <lastmod>2026-11-02T16:48:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-pyramid/sssss1yj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-pyramid/sssss1yj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-pyramid/sssss1yj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-pyramid/sssss1yj"/>
      <lastmod>2026-11-02T16:48:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-intersections-demo/sssss1yp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-intersections-demo/sssss1yp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-intersections-demo/sssss1yp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-intersections-demo/sssss1yp"/>
      <lastmod>2026-11-02T18:35:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-intersections-demo/sssss1yp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-intersections-demo/sssss1yp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-intersections-demo/sssss1yp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-intersections-demo/sssss1yp"/>
      <lastmod>2026-11-02T18:35:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-exponential-and-logarithmic-functions/sssss1yw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-exponential-and-logarithmic-functions/sssss1yw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-exponential-and-logarithmic-functions/sssss1yw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-exponential-and-logarithmic-functions/sssss1yw"/>
      <lastmod>2026-11-02T12:22:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-exponential-and-logarithmic-functions/sssss1yw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-exponential-and-logarithmic-functions/sssss1yw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-exponential-and-logarithmic-functions/sssss1yw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-exponential-and-logarithmic-functions/sssss1yw"/>
      <lastmod>2026-11-02T12:22:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-bisector-and-perpendicular-bisector-construction/sssss1y6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-and-perpendicular-bisector-construction/sssss1y6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-and-perpendicular-bisector-construction/sssss1y6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-and-perpendicular-bisector-construction/sssss1y6"/>
      <lastmod>2026-11-01T23:29:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-bisector-and-perpendicular-bisector-construction/sssss1y6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-and-perpendicular-bisector-construction/sssss1y6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-and-perpendicular-bisector-construction/sssss1y6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-and-perpendicular-bisector-construction/sssss1y6"/>
      <lastmod>2026-11-01T23:29:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-demonstration/sssss1yg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-demonstration/sssss1yg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-demonstration/sssss1yg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-demonstration/sssss1yg"/>
      <lastmod>2026-11-01T19:36:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-demonstration/sssss1yg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-demonstration/sssss1yg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-demonstration/sssss1yg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-demonstration/sssss1yg"/>
      <lastmod>2026-11-01T19:36:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-two-digit-numbers/sssss1y9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-two-digit-numbers/sssss1y9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-two-digit-numbers/sssss1y9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-two-digit-numbers/sssss1y9"/>
      <lastmod>2026-11-02T08:30:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-two-digit-numbers/sssss1y9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-two-digit-numbers/sssss1y9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-two-digit-numbers/sssss1y9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-two-digit-numbers/sssss1y9"/>
      <lastmod>2026-11-02T08:30:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-of-symmetry-activity/sssss1ye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-of-symmetry-activity/sssss1ye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-of-symmetry-activity/sssss1ye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-of-symmetry-activity/sssss1ye"/>
      <lastmod>2026-11-02T03:17:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-of-symmetry-activity/sssss1ye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-of-symmetry-activity/sssss1ye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-of-symmetry-activity/sssss1ye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-of-symmetry-activity/sssss1ye"/>
      <lastmod>2026-11-02T03:17:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bases-and-heights-of-parallelograms-by-geogebra-classroom-activities/sssss1yv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bases-and-heights-of-parallelograms-by-geogebra-classroom-activities/sssss1yv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bases-and-heights-of-parallelograms-by-geogebra-classroom-activities/sssss1yv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bases-and-heights-of-parallelograms-by-geogebra-classroom-activities/sssss1yv"/>
      <lastmod>2026-11-01T23:08:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bases-and-heights-of-parallelograms-by-geogebra-classroom-activities/sssss1yv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bases-and-heights-of-parallelograms-by-geogebra-classroom-activities/sssss1yv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bases-and-heights-of-parallelograms-by-geogebra-classroom-activities/sssss1yv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bases-and-heights-of-parallelograms-by-geogebra-classroom-activities/sssss1yv"/>
      <lastmod>2026-11-01T23:08:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eccentric-axial-loading-stress-distribution-on-a-section/sssss1y4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eccentric-axial-loading-stress-distribution-on-a-section/sssss1y4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eccentric-axial-loading-stress-distribution-on-a-section/sssss1y4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eccentric-axial-loading-stress-distribution-on-a-section/sssss1y4"/>
      <lastmod>2026-11-02T06:52:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eccentric-axial-loading-stress-distribution-on-a-section/sssss1y4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eccentric-axial-loading-stress-distribution-on-a-section/sssss1y4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eccentric-axial-loading-stress-distribution-on-a-section/sssss1y4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eccentric-axial-loading-stress-distribution-on-a-section/sssss1y4"/>
      <lastmod>2026-11-02T06:52:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sin-x-derivative-trace/sssss1yl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sin-x-derivative-trace/sssss1yl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sin-x-derivative-trace/sssss1yl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sin-x-derivative-trace/sssss1yl"/>
      <lastmod>2026-11-01T22:07:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sin-x-derivative-trace/sssss1yl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sin-x-derivative-trace/sssss1yl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sin-x-derivative-trace/sssss1yl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sin-x-derivative-trace/sssss1yl"/>
      <lastmod>2026-11-01T22:07:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone-by-cuemath-2/sssss1yy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-cuemath-2/sssss1yy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by-cuemath-2/sssss1yy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-cuemath-2/sssss1yy"/>
      <lastmod>2026-11-02T02:54:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cone-by-cuemath-2/sssss1yy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-cuemath-2/sssss1yy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by-cuemath-2/sssss1yy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-cuemath-2/sssss1yy"/>
      <lastmod>2026-11-02T02:54:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-with-three-equal-sides/sssss1ya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-with-three-equal-sides/sssss1ya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-with-three-equal-sides/sssss1ya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-with-three-equal-sides/sssss1ya"/>
      <lastmod>2026-11-02T15:44:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-with-three-equal-sides/sssss1ya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-with-three-equal-sides/sssss1ya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-with-three-equal-sides/sssss1ya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-with-three-equal-sides/sssss1ya"/>
      <lastmod>2026-11-02T15:44:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modular-multiplication-in-a-square-with-inversion/sssss1yc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modular-multiplication-in-a-square-with-inversion/sssss1yc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modular-multiplication-in-a-square-with-inversion/sssss1yc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modular-multiplication-in-a-square-with-inversion/sssss1yc"/>
      <lastmod>2026-11-02T00:45:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modular-multiplication-in-a-square-with-inversion/sssss1yc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modular-multiplication-in-a-square-with-inversion/sssss1yc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modular-multiplication-in-a-square-with-inversion/sssss1yc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modular-multiplication-in-a-square-with-inversion/sssss1yc"/>
      <lastmod>2026-11-02T00:45:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/viviani-s-theorem-exploration/sssss1yr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/viviani-s-theorem-exploration/sssss1yr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/viviani-s-theorem-exploration/sssss1yr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/viviani-s-theorem-exploration/sssss1yr"/>
      <lastmod>2026-11-02T09:29:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/viviani-s-theorem-exploration/sssss1yr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/viviani-s-theorem-exploration/sssss1yr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/viviani-s-theorem-exploration/sssss1yr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/viviani-s-theorem-exploration/sssss1yr"/>
      <lastmod>2026-11-02T09:29:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cylinder-geogebra/sssss1yh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cylinder-geogebra/sssss1yh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-sphere-and-cylinder-geogebra/sssss1yh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cylinder-geogebra/sssss1yh"/>
      <lastmod>2026-11-02T00:56:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-sphere-and-cylinder-geogebra/sssss1yh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cylinder-geogebra/sssss1yh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-sphere-and-cylinder-geogebra/sssss1yh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cylinder-geogebra/sssss1yh"/>
      <lastmod>2026-11-02T00:56:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/electromagnetic-waves-3d-vector-animation/sssss1yt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/electromagnetic-waves-3d-vector-animation/sssss1yt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/electromagnetic-waves-3d-vector-animation/sssss1yt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/electromagnetic-waves-3d-vector-animation/sssss1yt"/>
      <lastmod>2026-11-01T19:24:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/electromagnetic-waves-3d-vector-animation/sssss1yt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/electromagnetic-waves-3d-vector-animation/sssss1yt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/electromagnetic-waves-3d-vector-animation/sssss1yt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/electromagnetic-waves-3d-vector-animation/sssss1yt"/>
      <lastmod>2026-11-01T19:24:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/4d-3-body-momentum-conservation-visualization/sssss1yx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/4d-3-body-momentum-conservation-visualization/sssss1yx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/4d-3-body-momentum-conservation-visualization/sssss1yx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/4d-3-body-momentum-conservation-visualization/sssss1yx"/>
      <lastmod>2026-11-02T02:51:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/4d-3-body-momentum-conservation-visualization/sssss1yx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/4d-3-body-momentum-conservation-visualization/sssss1yx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/4d-3-body-momentum-conservation-visualization/sssss1yx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/4d-3-body-momentum-conservation-visualization/sssss1yx"/>
      <lastmod>2026-11-02T02:51:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-demonstration-of-the-chocolate-bar-paradox/sssss1yi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-demonstration-of-the-chocolate-bar-paradox/sssss1yi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-demonstration-of-the-chocolate-bar-paradox/sssss1yi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-demonstration-of-the-chocolate-bar-paradox/sssss1yi"/>
      <lastmod>2026-11-02T17:45:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-demonstration-of-the-chocolate-bar-paradox/sssss1yi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-demonstration-of-the-chocolate-bar-paradox/sssss1yi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-demonstration-of-the-chocolate-bar-paradox/sssss1yi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-demonstration-of-the-chocolate-bar-paradox/sssss1yi"/>
      <lastmod>2026-11-02T17:45:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tetrahedron-with-a-sphere-inside/sssss1yo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tetrahedron-with-a-sphere-inside/sssss1yo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tetrahedron-with-a-sphere-inside/sssss1yo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tetrahedron-with-a-sphere-inside/sssss1yo"/>
      <lastmod>2026-11-02T18:28:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tetrahedron-with-a-sphere-inside/sssss1yo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tetrahedron-with-a-sphere-inside/sssss1yo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tetrahedron-with-a-sphere-inside/sssss1yo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tetrahedron-with-a-sphere-inside/sssss1yo"/>
      <lastmod>2026-11-02T18:28:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-vectors-by-malin-christersson/sssss1as</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-vectors-by-malin-christersson/sssss1as"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-vectors-by-malin-christersson/sssss1as"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-vectors-by-malin-christersson/sssss1as"/>
      <lastmod>2026-11-02T02:39:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-vectors-by-malin-christersson/sssss1as</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-vectors-by-malin-christersson/sssss1as"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-vectors-by-malin-christersson/sssss1as"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-vectors-by-malin-christersson/sssss1as"/>
      <lastmod>2026-11-02T02:39:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/describing-flight-paths-1-cones-complex-numbers-and-polygons/sssss1a7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/describing-flight-paths-1-cones-complex-numbers-and-polygons/sssss1a7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/describing-flight-paths-1-cones-complex-numbers-and-polygons/sssss1a7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/describing-flight-paths-1-cones-complex-numbers-and-polygons/sssss1a7"/>
      <lastmod>2026-11-02T18:31:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/describing-flight-paths-1-cones-complex-numbers-and-polygons/sssss1a7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/describing-flight-paths-1-cones-complex-numbers-and-polygons/sssss1a7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/describing-flight-paths-1-cones-complex-numbers-and-polygons/sssss1a7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/describing-flight-paths-1-cones-complex-numbers-and-polygons/sssss1a7"/>
      <lastmod>2026-11-02T18:31:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-graphing-tool/sssss1an</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-graphing-tool/sssss1an"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-graphing-tool/sssss1an"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-graphing-tool/sssss1an"/>
      <lastmod>2026-11-02T13:14:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-graphing-tool/sssss1an</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-graphing-tool/sssss1an"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-graphing-tool/sssss1an"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-graphing-tool/sssss1an"/>
      <lastmod>2026-11-02T13:14:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-kemal-ataturk-portrait/sssss1a2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-kemal-ataturk-portrait/sssss1a2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-kemal-ataturk-portrait/sssss1a2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-kemal-ataturk-portrait/sssss1a2"/>
      <lastmod>2026-11-01T19:22:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-kemal-ataturk-portrait/sssss1a2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-kemal-ataturk-portrait/sssss1a2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-kemal-ataturk-portrait/sssss1a2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-kemal-ataturk-portrait/sssss1a2"/>
      <lastmod>2026-11-01T19:22:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-equation-of-a-line-by-vivax-solutions/sssss1ak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line-by-vivax-solutions/sssss1ak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-equation-of-a-line-by-vivax-solutions/sssss1ak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line-by-vivax-solutions/sssss1ak"/>
      <lastmod>2026-11-01T21:18:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-equation-of-a-line-by-vivax-solutions/sssss1ak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line-by-vivax-solutions/sssss1ak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-equation-of-a-line-by-vivax-solutions/sssss1ak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line-by-vivax-solutions/sssss1ak"/>
      <lastmod>2026-11-01T21:18:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p6-symmetry-problem-4-suspension-lines-and-horizontal-symmetry-axis/sssss1az</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p6-symmetry-problem-4-suspension-lines-and-horizontal-symmetry-axis/sssss1az"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p6-symmetry-problem-4-suspension-lines-and-horizontal-symmetry-axis/sssss1az"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p6-symmetry-problem-4-suspension-lines-and-horizontal-symmetry-axis/sssss1az"/>
      <lastmod>2026-11-02T02:10:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p6-symmetry-problem-4-suspension-lines-and-horizontal-symmetry-axis/sssss1az</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p6-symmetry-problem-4-suspension-lines-and-horizontal-symmetry-axis/sssss1az"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p6-symmetry-problem-4-suspension-lines-and-horizontal-symmetry-axis/sssss1az"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p6-symmetry-problem-4-suspension-lines-and-horizontal-symmetry-axis/sssss1az"/>
      <lastmod>2026-11-02T02:10:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-rectangle/sssss1a0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-rectangle/sssss1a0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-rectangle/sssss1a0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-rectangle/sssss1a0"/>
      <lastmod>2026-11-02T18:03:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-rectangle/sssss1a0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-rectangle/sssss1a0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-rectangle/sssss1a0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-rectangle/sssss1a0"/>
      <lastmod>2026-11-02T18:03:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/weighted-geometric-median/sssss1ad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/weighted-geometric-median/sssss1ad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/weighted-geometric-median/sssss1ad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/weighted-geometric-median/sssss1ad"/>
      <lastmod>2026-11-01T23:54:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/weighted-geometric-median/sssss1ad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/weighted-geometric-median/sssss1ad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/weighted-geometric-median/sssss1ad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/weighted-geometric-median/sssss1ad"/>
      <lastmod>2026-11-01T23:54:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-volume-by-courtney-scott/sssss1af</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-by-courtney-scott/sssss1af"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-by-courtney-scott/sssss1af"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-by-courtney-scott/sssss1af"/>
      <lastmod>2026-11-02T02:15:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-volume-by-courtney-scott/sssss1af</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-by-courtney-scott/sssss1af"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-by-courtney-scott/sssss1af"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-by-courtney-scott/sssss1af"/>
      <lastmod>2026-11-02T02:15:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-and-hyperbola-demo/sssss1a8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-hyperbola-demo/sssss1a8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-hyperbola-demo/sssss1a8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-hyperbola-demo/sssss1a8"/>
      <lastmod>2026-11-01T22:09:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-and-hyperbola-demo/sssss1a8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-hyperbola-demo/sssss1a8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-hyperbola-demo/sssss1a8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-hyperbola-demo/sssss1a8"/>
      <lastmod>2026-11-01T22:09:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic/sssss1au</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic/sssss1au"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form-of-a-quadratic/sssss1au"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic/sssss1au"/>
      <lastmod>2026-11-01T21:40:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertex-form-of-a-quadratic/sssss1au</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic/sssss1au"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form-of-a-quadratic/sssss1au"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form-of-a-quadratic/sssss1au"/>
      <lastmod>2026-11-01T21:40:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-multi-step-1-variable-inequalities/sssss1a5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-multi-step-1-variable-inequalities/sssss1a5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-multi-step-1-variable-inequalities/sssss1a5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-multi-step-1-variable-inequalities/sssss1a5"/>
      <lastmod>2026-11-02T18:18:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-multi-step-1-variable-inequalities/sssss1a5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-multi-step-1-variable-inequalities/sssss1a5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-multi-step-1-variable-inequalities/sssss1a5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-multi-step-1-variable-inequalities/sssss1a5"/>
      <lastmod>2026-11-02T18:18:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebraic-types/sssss1ab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebraic-types/sssss1ab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebraic-types/sssss1ab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebraic-types/sssss1ab"/>
      <lastmod>2026-11-02T16:37:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebraic-types/sssss1ab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebraic-types/sssss1ab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebraic-types/sssss1ab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebraic-types/sssss1ab"/>
      <lastmod>2026-11-02T16:37:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squares-and-greek-crosses/sssss1a3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-and-greek-crosses/sssss1a3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-and-greek-crosses/sssss1a3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-and-greek-crosses/sssss1a3"/>
      <lastmod>2026-11-02T18:26:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/squares-and-greek-crosses/sssss1a3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-and-greek-crosses/sssss1a3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-and-greek-crosses/sssss1a3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-and-greek-crosses/sssss1a3"/>
      <lastmod>2026-11-02T18:26:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-integers-with-geometric-construction/sssss1aq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-integers-with-geometric-construction/sssss1aq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-integers-with-geometric-construction/sssss1aq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-integers-with-geometric-construction/sssss1aq"/>
      <lastmod>2026-11-02T00:37:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-integers-with-geometric-construction/sssss1aq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-integers-with-geometric-construction/sssss1aq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-integers-with-geometric-construction/sssss1aq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-integers-with-geometric-construction/sssss1aq"/>
      <lastmod>2026-11-02T00:37:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-functions-class-example-3/sssss1a1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-class-example-3/sssss1a1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-class-example-3/sssss1a1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-class-example-3/sssss1a1"/>
      <lastmod>2026-11-02T15:16:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-functions-class-example-3/sssss1a1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-class-example-3/sssss1a1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-class-example-3/sssss1a1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-class-example-3/sssss1a1"/>
      <lastmod>2026-11-02T15:16:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rate-accumulation/sssss1am</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rate-accumulation/sssss1am"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rate-accumulation/sssss1am"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rate-accumulation/sssss1am"/>
      <lastmod>2026-11-02T17:05:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rate-accumulation/sssss1am</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rate-accumulation/sssss1am"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rate-accumulation/sssss1am"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rate-accumulation/sssss1am"/>
      <lastmod>2026-11-02T17:05:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/resultant-force-of-4-forces-vector-composition/sssss1aj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/resultant-force-of-4-forces-vector-composition/sssss1aj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/resultant-force-of-4-forces-vector-composition/sssss1aj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/resultant-force-of-4-forces-vector-composition/sssss1aj"/>
      <lastmod>2026-11-01T21:47:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/resultant-force-of-4-forces-vector-composition/sssss1aj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/resultant-force-of-4-forces-vector-composition/sssss1aj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/resultant-force-of-4-forces-vector-composition/sssss1aj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/resultant-force-of-4-forces-vector-composition/sssss1aj"/>
      <lastmod>2026-11-01T21:47:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-for-exploring-trig-ratios/sssss1ap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-for-exploring-trig-ratios/sssss1ap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-for-exploring-trig-ratios/sssss1ap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-for-exploring-trig-ratios/sssss1ap"/>
      <lastmod>2026-11-01T23:50:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-for-exploring-trig-ratios/sssss1ap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-for-exploring-trig-ratios/sssss1ap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-for-exploring-trig-ratios/sssss1ap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-for-exploring-trig-ratios/sssss1ap"/>
      <lastmod>2026-11-01T23:50:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-between-two-planes-without-vectors/sssss1aw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-two-planes-without-vectors/sssss1aw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-two-planes-without-vectors/sssss1aw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-two-planes-without-vectors/sssss1aw"/>
      <lastmod>2026-11-02T18:37:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-between-two-planes-without-vectors/sssss1aw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-two-planes-without-vectors/sssss1aw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-two-planes-without-vectors/sssss1aw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-two-planes-without-vectors/sssss1aw"/>
      <lastmod>2026-11-02T18:37:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/empirical-rule/sssss1a6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/empirical-rule/sssss1a6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/empirical-rule/sssss1a6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/empirical-rule/sssss1a6"/>
      <lastmod>2026-11-02T12:44:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/empirical-rule/sssss1a6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/empirical-rule/sssss1a6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/empirical-rule/sssss1a6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/empirical-rule/sssss1a6"/>
      <lastmod>2026-11-02T12:44:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copying-a-line-segment-an-angle/sssss1ag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copying-a-line-segment-an-angle/sssss1ag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copying-a-line-segment-an-angle/sssss1ag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copying-a-line-segment-an-angle/sssss1ag"/>
      <lastmod>2026-11-01T23:09:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copying-a-line-segment-an-angle/sssss1ag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copying-a-line-segment-an-angle/sssss1ag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copying-a-line-segment-an-angle/sssss1ag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copying-a-line-segment-an-angle/sssss1ag"/>
      <lastmod>2026-11-01T23:09:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ice-cream-problem-simulation-by-abdul-latiff/sssss1a9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ice-cream-problem-simulation-by-abdul-latiff/sssss1a9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ice-cream-problem-simulation-by-abdul-latiff/sssss1a9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ice-cream-problem-simulation-by-abdul-latiff/sssss1a9"/>
      <lastmod>2026-11-01T20:47:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ice-cream-problem-simulation-by-abdul-latiff/sssss1a9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ice-cream-problem-simulation-by-abdul-latiff/sssss1a9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ice-cream-problem-simulation-by-abdul-latiff/sssss1a9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ice-cream-problem-simulation-by-abdul-latiff/sssss1a9"/>
      <lastmod>2026-11-01T20:47:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-over-a-circle-2/sssss1ae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-over-a-circle-2/sssss1ae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-over-a-circle-2/sssss1ae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-over-a-circle-2/sssss1ae"/>
      <lastmod>2026-11-02T03:13:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-over-a-circle-2/sssss1ae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-over-a-circle-2/sssss1ae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-over-a-circle-2/sssss1ae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-over-a-circle-2/sssss1ae"/>
      <lastmod>2026-11-02T03:13:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelograms-discovery-labs-ssssstma/sssss1av</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-discovery-labs-ssssstma/sssss1av"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-discovery-labs-ssssstma/sssss1av"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-discovery-labs-ssssstma/sssss1av"/>
      <lastmod>2026-11-01T23:47:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelograms-discovery-labs-ssssstma/sssss1av</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-discovery-labs-ssssstma/sssss1av"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-discovery-labs-ssssstma/sssss1av"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-discovery-labs-ssssstma/sssss1av"/>
      <lastmod>2026-11-01T23:47:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-quadrilateral/sssss1a4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-quadrilateral/sssss1a4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-quadrilateral/sssss1a4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-quadrilateral/sssss1a4"/>
      <lastmod>2026-11-01T23:56:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-quadrilateral/sssss1a4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-quadrilateral/sssss1a4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-quadrilateral/sssss1a4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-quadrilateral/sssss1a4"/>
      <lastmod>2026-11-01T23:56:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-triangle-grid-1/sssss1al</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-triangle-grid-1/sssss1al"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-triangle-grid-1/sssss1al"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-triangle-grid-1/sssss1al"/>
      <lastmod>2026-11-02T15:52:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-triangle-grid-1/sssss1al</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-triangle-grid-1/sssss1al"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-triangle-grid-1/sssss1al"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-triangle-grid-1/sssss1al"/>
      <lastmod>2026-11-02T15:52:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-logic-by-agouzal/sssss1ay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-by-agouzal/sssss1ay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-logic-by-agouzal/sssss1ay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-by-agouzal/sssss1ay"/>
      <lastmod>2026-11-01T21:37:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-logic-by-agouzal/sssss1ay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-by-agouzal/sssss1ay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-logic-by-agouzal/sssss1ay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-by-agouzal/sssss1ay"/>
      <lastmod>2026-11-01T21:37:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pgg/sssss1aa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pgg/sssss1aa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallpaper-symmetry-group-pgg/sssss1aa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pgg/sssss1aa"/>
      <lastmod>2026-11-02T13:39:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wallpaper-symmetry-group-pgg/sssss1aa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pgg/sssss1aa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallpaper-symmetry-group-pgg/sssss1aa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pgg/sssss1aa"/>
      <lastmod>2026-11-02T13:39:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-fractions-with-unlike-denominators/sssss1ac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions-with-unlike-denominators/sssss1ac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions-with-unlike-denominators/sssss1ac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions-with-unlike-denominators/sssss1ac"/>
      <lastmod>2026-11-02T07:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-fractions-with-unlike-denominators/sssss1ac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions-with-unlike-denominators/sssss1ac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions-with-unlike-denominators/sssss1ac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions-with-unlike-denominators/sssss1ac"/>
      <lastmod>2026-11-02T07:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-solids-by-revolution/sssss1ar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solids-by-revolution/sssss1ar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solids-by-revolution/sssss1ar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solids-by-revolution/sssss1ar"/>
      <lastmod>2026-11-02T00:05:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-solids-by-revolution/sssss1ar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solids-by-revolution/sssss1ar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solids-by-revolution/sssss1ar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solids-by-revolution/sssss1ar"/>
      <lastmod>2026-11-02T00:05:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/footstep-illusion-visual-illusion-via-translation-and-sequence/sssss1ah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/footstep-illusion-visual-illusion-via-translation-and-sequence/sssss1ah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/footstep-illusion-visual-illusion-via-translation-and-sequence/sssss1ah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/footstep-illusion-visual-illusion-via-translation-and-sequence/sssss1ah"/>
      <lastmod>2026-11-02T18:44:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/footstep-illusion-visual-illusion-via-translation-and-sequence/sssss1ah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/footstep-illusion-visual-illusion-via-translation-and-sequence/sssss1ah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/footstep-illusion-visual-illusion-via-translation-and-sequence/sssss1ah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/footstep-illusion-visual-illusion-via-translation-and-sequence/sssss1ah"/>
      <lastmod>2026-11-02T18:44:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivatives-and-tangent-lines/sssss1at</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-and-tangent-lines/sssss1at"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-and-tangent-lines/sssss1at"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-and-tangent-lines/sssss1at"/>
      <lastmod>2026-11-02T00:17:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivatives-and-tangent-lines/sssss1at</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-and-tangent-lines/sssss1at"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-and-tangent-lines/sssss1at"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-and-tangent-lines/sssss1at"/>
      <lastmod>2026-11-02T00:17:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diagonal-hint-for-a-rectangular-prism/sssss1ax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonal-hint-for-a-rectangular-prism/sssss1ax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonal-hint-for-a-rectangular-prism/sssss1ax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonal-hint-for-a-rectangular-prism/sssss1ax"/>
      <lastmod>2026-11-02T17:55:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diagonal-hint-for-a-rectangular-prism/sssss1ax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonal-hint-for-a-rectangular-prism/sssss1ax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonal-hint-for-a-rectangular-prism/sssss1ax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonal-hint-for-a-rectangular-prism/sssss1ax"/>
      <lastmod>2026-11-02T17:55:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-midsegment-2-proofs-without-words/sssss1ai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-2-proofs-without-words/sssss1ai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-midsegment-2-proofs-without-words/sssss1ai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-2-proofs-without-words/sssss1ai"/>
      <lastmod>2026-11-01T23:55:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-midsegment-2-proofs-without-words/sssss1ai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-2-proofs-without-words/sssss1ai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-midsegment-2-proofs-without-words/sssss1ai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-2-proofs-without-words/sssss1ai"/>
      <lastmod>2026-11-01T23:55:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-prism-by-lindsay-raybourn/sssss1ao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-by-lindsay-raybourn/sssss1ao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-by-lindsay-raybourn/sssss1ao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-by-lindsay-raybourn/sssss1ao"/>
      <lastmod>2026-11-02T18:21:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-prism-by-lindsay-raybourn/sssss1ao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-by-lindsay-raybourn/sssss1ao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-by-lindsay-raybourn/sssss1ao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-by-lindsay-raybourn/sssss1ao"/>
      <lastmod>2026-11-02T18:21:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trefoil-knot-surface-by-juan-carlos-ponce-campuzano/sssss1cs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trefoil-knot-surface-by-juan-carlos-ponce-campuzano/sssss1cs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trefoil-knot-surface-by-juan-carlos-ponce-campuzano/sssss1cs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trefoil-knot-surface-by-juan-carlos-ponce-campuzano/sssss1cs"/>
      <lastmod>2026-11-02T17:49:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trefoil-knot-surface-by-juan-carlos-ponce-campuzano/sssss1cs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trefoil-knot-surface-by-juan-carlos-ponce-campuzano/sssss1cs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trefoil-knot-surface-by-juan-carlos-ponce-campuzano/sssss1cs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trefoil-knot-surface-by-juan-carlos-ponce-campuzano/sssss1cs"/>
      <lastmod>2026-11-02T17:49:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-4-concurrency-points/sssss1c7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-4-concurrency-points/sssss1c7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-s-4-concurrency-points/sssss1c7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-4-concurrency-points/sssss1c7"/>
      <lastmod>2026-11-01T21:12:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-triangle-s-4-concurrency-points/sssss1c7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-4-concurrency-points/sssss1c7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-s-4-concurrency-points/sssss1c7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-4-concurrency-points/sssss1c7"/>
      <lastmod>2026-11-01T21:12:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-vectors-parallelogram-and-triangle-law-interactive-demo/sssss1cn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-vectors-parallelogram-and-triangle-law-interactive-demo/sssss1cn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-vectors-parallelogram-and-triangle-law-interactive-demo/sssss1cn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-vectors-parallelogram-and-triangle-law-interactive-demo/sssss1cn"/>
      <lastmod>2026-11-02T11:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-vectors-parallelogram-and-triangle-law-interactive-demo/sssss1cn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-vectors-parallelogram-and-triangle-law-interactive-demo/sssss1cn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-vectors-parallelogram-and-triangle-law-interactive-demo/sssss1cn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-vectors-parallelogram-and-triangle-law-interactive-demo/sssss1cn"/>
      <lastmod>2026-11-02T11:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/act-6-2020-incircle-and-similar-triangles-in-a-random-experiment/sssss1c2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/act-6-2020-incircle-and-similar-triangles-in-a-random-experiment/sssss1c2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/act-6-2020-incircle-and-similar-triangles-in-a-random-experiment/sssss1c2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/act-6-2020-incircle-and-similar-triangles-in-a-random-experiment/sssss1c2"/>
      <lastmod>2026-11-01T19:10:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/act-6-2020-incircle-and-similar-triangles-in-a-random-experiment/sssss1c2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/act-6-2020-incircle-and-similar-triangles-in-a-random-experiment/sssss1c2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/act-6-2020-incircle-and-similar-triangles-in-a-random-experiment/sssss1c2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/act-6-2020-incircle-and-similar-triangles-in-a-random-experiment/sssss1c2"/>
      <lastmod>2026-11-01T19:10:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-graph-construction-example/sssss1ck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graph-construction-example/sssss1ck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graph-construction-example/sssss1ck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graph-construction-example/sssss1ck"/>
      <lastmod>2026-11-01T21:16:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-graph-construction-example/sssss1ck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graph-construction-example/sssss1ck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graph-construction-example/sssss1ck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graph-construction-example/sssss1ck"/>
      <lastmod>2026-11-01T21:16:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-cross-sections-demo/sssss1cz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-cross-sections-demo/sssss1cz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-cross-sections-demo/sssss1cz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-cross-sections-demo/sssss1cz"/>
      <lastmod>2026-11-02T09:35:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-cross-sections-demo/sssss1cz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-cross-sections-demo/sssss1cz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-cross-sections-demo/sssss1cz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-cross-sections-demo/sssss1cz"/>
      <lastmod>2026-11-02T09:35:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-model-demonstration-by-indra-novita-yuliana/sssss1c0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-model-demonstration-by-indra-novita-yuliana/sssss1c0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-model-demonstration-by-indra-novita-yuliana/sssss1c0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-model-demonstration-by-indra-novita-yuliana/sssss1c0"/>
      <lastmod>2026-11-02T17:38:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-model-demonstration-by-indra-novita-yuliana/sssss1c0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-model-demonstration-by-indra-novita-yuliana/sssss1c0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-model-demonstration-by-indra-novita-yuliana/sssss1c0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-model-demonstration-by-indra-novita-yuliana/sssss1c0"/>
      <lastmod>2026-11-02T17:38:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curve-stitching-with-rotations-and-inversion-geometric-construction-and-mathema/sssss1cd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching-with-rotations-and-inversion-geometric-construction-and-mathema/sssss1cd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-with-rotations-and-inversion-geometric-construction-and-mathema/sssss1cd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching-with-rotations-and-inversion-geometric-construction-and-mathema/sssss1cd"/>
      <lastmod>2026-11-02T00:58:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curve-stitching-with-rotations-and-inversion-geometric-construction-and-mathema/sssss1cd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching-with-rotations-and-inversion-geometric-construction-and-mathema/sssss1cd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-with-rotations-and-inversion-geometric-construction-and-mathema/sssss1cd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching-with-rotations-and-inversion-geometric-construction-and-mathema/sssss1cd"/>
      <lastmod>2026-11-02T00:58:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diagonals-of-a-dodecahedron/sssss1cf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-a-dodecahedron/sssss1cf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-a-dodecahedron/sssss1cf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-a-dodecahedron/sssss1cf"/>
      <lastmod>2026-11-01T21:04:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diagonals-of-a-dodecahedron/sssss1cf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-a-dodecahedron/sssss1cf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-a-dodecahedron/sssss1cf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-a-dodecahedron/sssss1cf"/>
      <lastmod>2026-11-01T21:04:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-demo/sssss1c8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-demo/sssss1c8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solid-of-revolution-demo/sssss1c8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-demo/sssss1c8"/>
      <lastmod>2026-11-01T23:49:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-solid-of-revolution-demo/sssss1c8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-demo/sssss1c8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solid-of-revolution-demo/sssss1c8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-demo/sssss1c8"/>
      <lastmod>2026-11-01T23:49:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions-demo/sssss1cu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions-demo/sssss1cu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-and-negative-binomial-distributions-demo/sssss1cu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions-demo/sssss1cu"/>
      <lastmod>2026-11-01T23:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-and-negative-binomial-distributions-demo/sssss1cu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions-demo/sssss1cu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-and-negative-binomial-distributions-demo/sssss1cu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-and-negative-binomial-distributions-demo/sssss1cu"/>
      <lastmod>2026-11-01T23:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cartesian-representation-of-complex-numbers-vector-visualization/sssss1c5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cartesian-representation-of-complex-numbers-vector-visualization/sssss1c5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cartesian-representation-of-complex-numbers-vector-visualization/sssss1c5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cartesian-representation-of-complex-numbers-vector-visualization/sssss1c5"/>
      <lastmod>2026-11-01T19:22:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cartesian-representation-of-complex-numbers-vector-visualization/sssss1c5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cartesian-representation-of-complex-numbers-vector-visualization/sssss1c5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cartesian-representation-of-complex-numbers-vector-visualization/sssss1c5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cartesian-representation-of-complex-numbers-vector-visualization/sssss1c5"/>
      <lastmod>2026-11-01T19:22:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/base-vs-height-for-constant-area-triangle/sssss1cb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/base-vs-height-for-constant-area-triangle/sssss1cb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/base-vs-height-for-constant-area-triangle/sssss1cb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/base-vs-height-for-constant-area-triangle/sssss1cb"/>
      <lastmod>2026-11-02T17:40:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/base-vs-height-for-constant-area-triangle/sssss1cb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/base-vs-height-for-constant-area-triangle/sssss1cb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/base-vs-height-for-constant-area-triangle/sssss1cb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/base-vs-height-for-constant-area-triangle/sssss1cb"/>
      <lastmod>2026-11-02T17:40:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lines-of-symmetry-investigation-mirror-symmetry-in-polygons-and-circles/sssss1c3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-of-symmetry-investigation-mirror-symmetry-in-polygons-and-circles/sssss1c3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-of-symmetry-investigation-mirror-symmetry-in-polygons-and-circles/sssss1c3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-of-symmetry-investigation-mirror-symmetry-in-polygons-and-circles/sssss1c3"/>
      <lastmod>2026-11-02T16:54:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lines-of-symmetry-investigation-mirror-symmetry-in-polygons-and-circles/sssss1c3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-of-symmetry-investigation-mirror-symmetry-in-polygons-and-circles/sssss1c3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-of-symmetry-investigation-mirror-symmetry-in-polygons-and-circles/sssss1c3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-of-symmetry-investigation-mirror-symmetry-in-polygons-and-circles/sssss1c3"/>
      <lastmod>2026-11-02T16:54:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-by-hannu-m-ki/sssss1cq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-hannu-m-ki/sssss1cq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-hannu-m-ki/sssss1cq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-hannu-m-ki/sssss1cq"/>
      <lastmod>2026-11-01T21:24:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-by-hannu-m-ki/sssss1cq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-hannu-m-ki/sssss1cq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-hannu-m-ki/sssss1cq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-hannu-m-ki/sssss1cq"/>
      <lastmod>2026-11-01T21:24:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sas-theorem-exercise-1b-proving-triangles-congruent/sssss1c1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-theorem-exercise-1b-proving-triangles-congruent/sssss1c1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-theorem-exercise-1b-proving-triangles-congruent/sssss1c1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-theorem-exercise-1b-proving-triangles-congruent/sssss1c1"/>
      <lastmod>2026-11-02T18:24:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sas-theorem-exercise-1b-proving-triangles-congruent/sssss1c1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-theorem-exercise-1b-proving-triangles-congruent/sssss1c1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-theorem-exercise-1b-proving-triangles-congruent/sssss1c1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-theorem-exercise-1b-proving-triangles-congruent/sssss1c1"/>
      <lastmod>2026-11-02T18:24:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drag-and-drop-points-to-create-histogram/sssss1cm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drag-and-drop-points-to-create-histogram/sssss1cm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drag-and-drop-points-to-create-histogram/sssss1cm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drag-and-drop-points-to-create-histogram/sssss1cm"/>
      <lastmod>2026-11-02T09:29:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drag-and-drop-points-to-create-histogram/sssss1cm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drag-and-drop-points-to-create-histogram/sssss1cm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drag-and-drop-points-to-create-histogram/sssss1cm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drag-and-drop-points-to-create-histogram/sssss1cm"/>
      <lastmod>2026-11-02T09:29:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bezier-racetrack/sssss1cj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bezier-racetrack/sssss1cj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bezier-racetrack/sssss1cj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bezier-racetrack/sssss1cj"/>
      <lastmod>2026-11-01T23:13:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bezier-racetrack/sssss1cj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bezier-racetrack/sssss1cj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bezier-racetrack/sssss1cj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bezier-racetrack/sssss1cj"/>
      <lastmod>2026-11-01T23:13:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/order-of-transformations-demo/sssss1cp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/order-of-transformations-demo/sssss1cp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/order-of-transformations-demo/sssss1cp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/order-of-transformations-demo/sssss1cp"/>
      <lastmod>2026-11-01T23:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/order-of-transformations-demo/sssss1cp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/order-of-transformations-demo/sssss1cp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/order-of-transformations-demo/sssss1cp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/order-of-transformations-demo/sssss1cp"/>
      <lastmod>2026-11-01T23:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-parameter-family-of-lines/sssss1cw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-parameter-family-of-lines/sssss1cw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-parameter-family-of-lines/sssss1cw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-parameter-family-of-lines/sssss1cw"/>
      <lastmod>2026-11-02T03:14:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-parameter-family-of-lines/sssss1cw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-parameter-family-of-lines/sssss1cw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-parameter-family-of-lines/sssss1cw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-parameter-family-of-lines/sssss1cw"/>
      <lastmod>2026-11-02T03:14:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-and-derivative/sssss1c6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-and-derivative/sssss1c6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-and-derivative/sssss1c6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-and-derivative/sssss1c6"/>
      <lastmod>2026-11-02T12:43:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-and-derivative/sssss1c6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-and-derivative/sssss1c6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-and-derivative/sssss1c6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-and-derivative/sssss1c6"/>
      <lastmod>2026-11-02T12:43:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/write-an-equation-of-a-line-given-two-points/sssss1cg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-an-equation-of-a-line-given-two-points/sssss1cg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-an-equation-of-a-line-given-two-points/sssss1cg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-an-equation-of-a-line-given-two-points/sssss1cg"/>
      <lastmod>2026-11-02T15:29:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/write-an-equation-of-a-line-given-two-points/sssss1cg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-an-equation-of-a-line-given-two-points/sssss1cg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-an-equation-of-a-line-given-two-points/sssss1cg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-an-equation-of-a-line-given-two-points/sssss1cg"/>
      <lastmod>2026-11-02T15:29:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-and-cube-by-eranderson/sssss1c9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-and-cube-by-eranderson/sssss1c9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-and-cube-by-eranderson/sssss1c9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-and-cube-by-eranderson/sssss1c9"/>
      <lastmod>2026-11-02T13:09:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-and-cube-by-eranderson/sssss1c9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-and-cube-by-eranderson/sssss1c9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-and-cube-by-eranderson/sssss1c9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-and-cube-by-eranderson/sssss1c9"/>
      <lastmod>2026-11-02T13:09:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/illustrating-set-operations-with-venn-diagrams/sssss1ce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/illustrating-set-operations-with-venn-diagrams/sssss1ce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/illustrating-set-operations-with-venn-diagrams/sssss1ce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/illustrating-set-operations-with-venn-diagrams/sssss1ce"/>
      <lastmod>2026-11-02T18:30:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/illustrating-set-operations-with-venn-diagrams/sssss1ce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/illustrating-set-operations-with-venn-diagrams/sssss1ce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/illustrating-set-operations-with-venn-diagrams/sssss1ce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/illustrating-set-operations-with-venn-diagrams/sssss1ce"/>
      <lastmod>2026-11-02T18:30:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-exercise-3/sssss1cv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-exercise-3/sssss1cv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-exercise-3/sssss1cv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-exercise-3/sssss1cv"/>
      <lastmod>2026-11-02T17:14:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-exercise-3/sssss1cv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-exercise-3/sssss1cv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-exercise-3/sssss1cv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-exercise-3/sssss1cv"/>
      <lastmod>2026-11-02T17:14:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/example-of-limit-of-a-function-of-two-variables-two-planes/sssss1c4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-of-limit-of-a-function-of-two-variables-two-planes/sssss1c4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-of-limit-of-a-function-of-two-variables-two-planes/sssss1c4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-of-limit-of-a-function-of-two-variables-two-planes/sssss1c4"/>
      <lastmod>2026-11-01T23:27:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/example-of-limit-of-a-function-of-two-variables-two-planes/sssss1c4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-of-limit-of-a-function-of-two-variables-two-planes/sssss1c4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-of-limit-of-a-function-of-two-variables-two-planes/sssss1c4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-of-limit-of-a-function-of-two-variables-two-planes/sssss1c4"/>
      <lastmod>2026-11-01T23:27:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-arithmetic-demo/sssss1cl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-arithmetic-demo/sssss1cl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-arithmetic-demo/sssss1cl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-arithmetic-demo/sssss1cl"/>
      <lastmod>2026-11-01T23:32:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-arithmetic-demo/sssss1cl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-arithmetic-demo/sssss1cl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-arithmetic-demo/sssss1cl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-arithmetic-demo/sssss1cl"/>
      <lastmod>2026-11-01T23:32:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-and-its-properties/sssss1cy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-and-its-properties/sssss1cy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-and-its-properties/sssss1cy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-and-its-properties/sssss1cy"/>
      <lastmod>2026-11-01T23:12:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-and-its-properties/sssss1cy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-and-its-properties/sssss1cy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-and-its-properties/sssss1cy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-and-its-properties/sssss1cy"/>
      <lastmod>2026-11-01T23:12:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pie-chart-interpretation/sssss1ca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pie-chart-interpretation/sssss1ca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pie-chart-interpretation/sssss1ca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pie-chart-interpretation/sssss1ca"/>
      <lastmod>2026-11-02T15:05:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pie-chart-interpretation/sssss1ca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pie-chart-interpretation/sssss1ca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pie-chart-interpretation/sssss1ca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pie-chart-interpretation/sssss1ca"/>
      <lastmod>2026-11-02T15:05:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-with-percentages-and-pythagorean-theorem/sssss1cc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-with-percentages-and-pythagorean-theorem/sssss1cc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-with-percentages-and-pythagorean-theorem/sssss1cc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-with-percentages-and-pythagorean-theorem/sssss1cc"/>
      <lastmod>2026-11-02T12:05:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-with-percentages-and-pythagorean-theorem/sssss1cc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-with-percentages-and-pythagorean-theorem/sssss1cc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-with-percentages-and-pythagorean-theorem/sssss1cc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-with-percentages-and-pythagorean-theorem/sssss1cc"/>
      <lastmod>2026-11-02T12:05:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-triangles-on-the-same-base-and-between-parallel-lines/sssss1cr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-triangles-on-the-same-base-and-between-parallel-lines/sssss1cr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-triangles-on-the-same-base-and-between-parallel-lines/sssss1cr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-triangles-on-the-same-base-and-between-parallel-lines/sssss1cr"/>
      <lastmod>2026-11-01T21:34:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-triangles-on-the-same-base-and-between-parallel-lines/sssss1cr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-triangles-on-the-same-base-and-between-parallel-lines/sssss1cr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-triangles-on-the-same-base-and-between-parallel-lines/sssss1cr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-triangles-on-the-same-base-and-between-parallel-lines/sssss1cr"/>
      <lastmod>2026-11-01T21:34:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-reflection-in-3d-reverses-orientation/sssss1ch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-reflection-in-3d-reverses-orientation/sssss1ch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-reflection-in-3d-reverses-orientation/sssss1ch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-reflection-in-3d-reverses-orientation/sssss1ch"/>
      <lastmod>2026-11-02T10:44:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-reflection-in-3d-reverses-orientation/sssss1ch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-reflection-in-3d-reverses-orientation/sssss1ch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-reflection-in-3d-reverses-orientation/sssss1ch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-reflection-in-3d-reverses-orientation/sssss1ch"/>
      <lastmod>2026-11-02T10:44:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/golden-ratio-in-an-octagonal-building/sssss1ct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-ratio-in-an-octagonal-building/sssss1ct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/golden-ratio-in-an-octagonal-building/sssss1ct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/golden-ratio-in-an-octagonal-building/sssss1ct"/>
      <lastmod>2026-11-01T23:36:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/golden-ratio-in-an-octagonal-building/sssss1ct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-ratio-in-an-octagonal-building/sssss1ct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/golden-ratio-in-an-octagonal-building/sssss1ct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/golden-ratio-in-an-octagonal-building/sssss1ct"/>
      <lastmod>2026-11-01T23:36:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/difference-of-semicircles-demo/sssss1cx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/difference-of-semicircles-demo/sssss1cx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/difference-of-semicircles-demo/sssss1cx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/difference-of-semicircles-demo/sssss1cx"/>
      <lastmod>2026-11-02T15:04:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/difference-of-semicircles-demo/sssss1cx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/difference-of-semicircles-demo/sssss1cx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/difference-of-semicircles-demo/sssss1cx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/difference-of-semicircles-demo/sssss1cx"/>
      <lastmod>2026-11-02T15:04:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-kite-by-tyun/sssss1ci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-kite-by-tyun/sssss1ci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-kite-by-tyun/sssss1ci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-kite-by-tyun/sssss1ci"/>
      <lastmod>2026-11-02T12:10:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-kite-by-tyun/sssss1ci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-kite-by-tyun/sssss1ci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-kite-by-tyun/sssss1ci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-kite-by-tyun/sssss1ci"/>
      <lastmod>2026-11-02T12:10:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/effect-of-linear-transformations-on-1-variable-statistics/sssss1co</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effect-of-linear-transformations-on-1-variable-statistics/sssss1co"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effect-of-linear-transformations-on-1-variable-statistics/sssss1co"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effect-of-linear-transformations-on-1-variable-statistics/sssss1co"/>
      <lastmod>2026-11-02T13:56:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/effect-of-linear-transformations-on-1-variable-statistics/sssss1co</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effect-of-linear-transformations-on-1-variable-statistics/sssss1co"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effect-of-linear-transformations-on-1-variable-statistics/sssss1co"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effect-of-linear-transformations-on-1-variable-statistics/sssss1co"/>
      <lastmod>2026-11-02T13:56:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-and-geometric-properties-of-a-cone/sssss1rs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-and-geometric-properties-of-a-cone/sssss1rs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-and-geometric-properties-of-a-cone/sssss1rs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-and-geometric-properties-of-a-cone/sssss1rs"/>
      <lastmod>2026-11-02T17:09:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-and-geometric-properties-of-a-cone/sssss1rs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-and-geometric-properties-of-a-cone/sssss1rs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-and-geometric-properties-of-a-cone/sssss1rs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-and-geometric-properties-of-a-cone/sssss1rs"/>
      <lastmod>2026-11-02T17:09:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nets-of-a-tetrahedron/sssss1r7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nets-of-a-tetrahedron/sssss1r7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nets-of-a-tetrahedron/sssss1r7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nets-of-a-tetrahedron/sssss1r7"/>
      <lastmod>2026-11-02T17:38:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nets-of-a-tetrahedron/sssss1r7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nets-of-a-tetrahedron/sssss1r7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nets-of-a-tetrahedron/sssss1r7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nets-of-a-tetrahedron/sssss1r7"/>
      <lastmod>2026-11-02T17:38:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-demonstration-of-circle-and-line-segment-theorems/sssss1rn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-circle-and-line-segment-theorems/sssss1rn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-demonstration-of-circle-and-line-segment-theorems/sssss1rn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-circle-and-line-segment-theorems/sssss1rn"/>
      <lastmod>2026-11-02T16:38:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-demonstration-of-circle-and-line-segment-theorems/sssss1rn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-circle-and-line-segment-theorems/sssss1rn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-demonstration-of-circle-and-line-segment-theorems/sssss1rn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-circle-and-line-segment-theorems/sssss1rn"/>
      <lastmod>2026-11-02T16:38:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-area-of-parallelogram/sssss1r2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-area-of-parallelogram/sssss1r2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-area-of-parallelogram/sssss1r2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-area-of-parallelogram/sssss1r2"/>
      <lastmod>2026-11-02T10:50:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-area-of-parallelogram/sssss1r2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-area-of-parallelogram/sssss1r2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-area-of-parallelogram/sssss1r2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-area-of-parallelogram/sssss1r2"/>
      <lastmod>2026-11-02T10:50:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-method/sssss1rk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-method/sssss1rk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-method/sssss1rk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-method/sssss1rk"/>
      <lastmod>2026-11-01T20:49:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-method/sssss1rk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-method/sssss1rk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-method/sssss1rk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-method/sssss1rk"/>
      <lastmod>2026-11-01T20:49:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modelling-a-tipi-with-sliders/sssss1rz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modelling-a-tipi-with-sliders/sssss1rz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modelling-a-tipi-with-sliders/sssss1rz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modelling-a-tipi-with-sliders/sssss1rz"/>
      <lastmod>2026-11-02T18:46:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modelling-a-tipi-with-sliders/sssss1rz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modelling-a-tipi-with-sliders/sssss1rz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modelling-a-tipi-with-sliders/sssss1rz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modelling-a-tipi-with-sliders/sssss1rz"/>
      <lastmod>2026-11-02T18:46:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-derivatives-and-the-tangent-plane/sssss1r0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivatives-and-the-tangent-plane/sssss1r0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivatives-and-the-tangent-plane/sssss1r0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivatives-and-the-tangent-plane/sssss1r0"/>
      <lastmod>2026-11-01T21:13:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-derivatives-and-the-tangent-plane/sssss1r0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivatives-and-the-tangent-plane/sssss1r0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivatives-and-the-tangent-plane/sssss1r0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivatives-and-the-tangent-plane/sssss1r0"/>
      <lastmod>2026-11-01T21:13:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/zeroes-of-quadratic-polynomial/sssss1rd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/zeroes-of-quadratic-polynomial/sssss1rd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/zeroes-of-quadratic-polynomial/sssss1rd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/zeroes-of-quadratic-polynomial/sssss1rd"/>
      <lastmod>2026-11-02T13:33:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/zeroes-of-quadratic-polynomial/sssss1rd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/zeroes-of-quadratic-polynomial/sssss1rd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/zeroes-of-quadratic-polynomial/sssss1rd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/zeroes-of-quadratic-polynomial/sssss1rd"/>
      <lastmod>2026-11-02T13:33:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-of-a-point-equidistant-from-two-straight-lines/sssss1rf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-a-point-equidistant-from-two-straight-lines/sssss1rf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-a-point-equidistant-from-two-straight-lines/sssss1rf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-a-point-equidistant-from-two-straight-lines/sssss1rf"/>
      <lastmod>2026-11-02T18:55:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-of-a-point-equidistant-from-two-straight-lines/sssss1rf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-a-point-equidistant-from-two-straight-lines/sssss1rf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-a-point-equidistant-from-two-straight-lines/sssss1rf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-a-point-equidistant-from-two-straight-lines/sssss1rf"/>
      <lastmod>2026-11-02T18:55:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roots-of-complex-numbers-visualization/sssss1r8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-complex-numbers-visualization/sssss1r8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-complex-numbers-visualization/sssss1r8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-complex-numbers-visualization/sssss1r8"/>
      <lastmod>2026-11-02T17:12:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roots-of-complex-numbers-visualization/sssss1r8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-complex-numbers-visualization/sssss1r8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-complex-numbers-visualization/sssss1r8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-complex-numbers-visualization/sssss1r8"/>
      <lastmod>2026-11-02T17:12:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-of-a-magnitude/sssss1ru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-of-a-magnitude/sssss1ru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-of-a-magnitude/sssss1ru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-of-a-magnitude/sssss1ru"/>
      <lastmod>2026-11-01T19:06:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-of-a-magnitude/sssss1ru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-of-a-magnitude/sssss1ru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-of-a-magnitude/sssss1ru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-of-a-magnitude/sssss1ru"/>
      <lastmod>2026-11-01T19:06:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-cylinders-demo/sssss1r5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cylinders-demo/sssss1r5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cylinders-demo/sssss1r5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cylinders-demo/sssss1r5"/>
      <lastmod>2026-11-01T19:27:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-cylinders-demo/sssss1r5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cylinders-demo/sssss1r5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cylinders-demo/sssss1r5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cylinders-demo/sssss1r5"/>
      <lastmod>2026-11-01T19:27:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tiling-with-whole-number-squares/sssss1rb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tiling-with-whole-number-squares/sssss1rb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tiling-with-whole-number-squares/sssss1rb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tiling-with-whole-number-squares/sssss1rb"/>
      <lastmod>2026-11-02T17:00:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tiling-with-whole-number-squares/sssss1rb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tiling-with-whole-number-squares/sssss1rb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tiling-with-whole-number-squares/sssss1rb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tiling-with-whole-number-squares/sssss1rb"/>
      <lastmod>2026-11-02T17:00:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/axial-symmetry-by-claudio-mart-nez-gil/sssss1r3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axial-symmetry-by-claudio-mart-nez-gil/sssss1r3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axial-symmetry-by-claudio-mart-nez-gil/sssss1r3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axial-symmetry-by-claudio-mart-nez-gil/sssss1r3"/>
      <lastmod>2026-11-01T19:14:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/axial-symmetry-by-claudio-mart-nez-gil/sssss1r3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axial-symmetry-by-claudio-mart-nez-gil/sssss1r3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axial-symmetry-by-claudio-mart-nez-gil/sssss1r3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axial-symmetry-by-claudio-mart-nez-gil/sssss1r3"/>
      <lastmod>2026-11-01T19:14:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/evaluating-quadratic-functions/sssss1rq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluating-quadratic-functions/sssss1rq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluating-quadratic-functions/sssss1rq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluating-quadratic-functions/sssss1rq"/>
      <lastmod>2026-11-02T09:27:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/evaluating-quadratic-functions/sssss1rq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluating-quadratic-functions/sssss1rq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluating-quadratic-functions/sssss1rq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluating-quadratic-functions/sssss1rq"/>
      <lastmod>2026-11-02T09:27:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-derivative/sssss1r1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-derivative/sssss1r1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-derivative/sssss1r1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-derivative/sssss1r1"/>
      <lastmod>2026-11-01T21:17:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-of-derivative/sssss1r1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-derivative/sssss1r1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-derivative/sssss1r1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-derivative/sssss1r1"/>
      <lastmod>2026-11-01T21:17:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-trapezoid-properties/sssss1rm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-trapezoid-properties/sssss1rm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-trapezoid-properties/sssss1rm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-trapezoid-properties/sssss1rm"/>
      <lastmod>2026-11-02T12:49:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-trapezoid-properties/sssss1rm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-trapezoid-properties/sssss1rm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-trapezoid-properties/sssss1rm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-trapezoid-properties/sssss1rm"/>
      <lastmod>2026-11-02T12:49:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/frog/sssss1rj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/frog/sssss1rj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/frog/sssss1rj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/frog/sssss1rj"/>
      <lastmod>2026-11-01T23:27:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/frog/sssss1rj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/frog/sssss1rj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/frog/sssss1rj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/frog/sssss1rj"/>
      <lastmod>2026-11-01T23:27:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-and-subtracting-linear-functions-exercise/sssss1rp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-linear-functions-exercise/sssss1rp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-and-subtracting-linear-functions-exercise/sssss1rp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-linear-functions-exercise/sssss1rp"/>
      <lastmod>2026-11-02T16:55:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-and-subtracting-linear-functions-exercise/sssss1rp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-linear-functions-exercise/sssss1rp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-and-subtracting-linear-functions-exercise/sssss1rp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-linear-functions-exercise/sssss1rp"/>
      <lastmod>2026-11-02T16:55:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-the-equation-of-the-line-of-symmetry-of-an-isosceles-triangle/sssss1rw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-equation-of-the-line-of-symmetry-of-an-isosceles-triangle/sssss1rw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-equation-of-the-line-of-symmetry-of-an-isosceles-triangle/sssss1rw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-equation-of-the-line-of-symmetry-of-an-isosceles-triangle/sssss1rw"/>
      <lastmod>2026-11-01T23:22:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-the-equation-of-the-line-of-symmetry-of-an-isosceles-triangle/sssss1rw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-equation-of-the-line-of-symmetry-of-an-isosceles-triangle/sssss1rw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-equation-of-the-line-of-symmetry-of-an-isosceles-triangle/sssss1rw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-equation-of-the-line-of-symmetry-of-an-isosceles-triangle/sssss1rw"/>
      <lastmod>2026-11-01T23:22:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modeling-2-digit-subtraction/sssss1r6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-2-digit-subtraction/sssss1r6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-2-digit-subtraction/sssss1r6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-2-digit-subtraction/sssss1r6"/>
      <lastmod>2026-11-02T03:15:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modeling-2-digit-subtraction/sssss1r6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-2-digit-subtraction/sssss1r6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-2-digit-subtraction/sssss1r6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-2-digit-subtraction/sssss1r6"/>
      <lastmod>2026-11-02T03:15:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-equations-using-the-intercepts/sssss1rg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-using-the-intercepts/sssss1rg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-using-the-intercepts/sssss1rg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-using-the-intercepts/sssss1rg"/>
      <lastmod>2026-11-01T19:33:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-equations-using-the-intercepts/sssss1rg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-using-the-intercepts/sssss1rg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-using-the-intercepts/sssss1rg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-using-the-intercepts/sssss1rg"/>
      <lastmod>2026-11-01T19:33:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-cone-similar-triangles-and-definite-integral-im-8-5-15/sssss1r9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-cone-similar-triangles-and-definite-integral-im-8-5-15/sssss1r9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-cone-similar-triangles-and-definite-integral-im-8-5-15/sssss1r9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-cone-similar-triangles-and-definite-integral-im-8-5-15/sssss1r9"/>
      <lastmod>2026-11-01T20:15:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-cone-similar-triangles-and-definite-integral-im-8-5-15/sssss1r9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-cone-similar-triangles-and-definite-integral-im-8-5-15/sssss1r9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-cone-similar-triangles-and-definite-integral-im-8-5-15/sssss1r9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-cone-similar-triangles-and-definite-integral-im-8-5-15/sssss1r9"/>
      <lastmod>2026-11-01T20:15:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-quadratic-linear-equations-graphically-game/sssss1re</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-linear-equations-graphically-game/sssss1re"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-linear-equations-graphically-game/sssss1re"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-linear-equations-graphically-game/sssss1re"/>
      <lastmod>2026-11-02T18:27:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-quadratic-linear-equations-graphically-game/sssss1re</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-linear-equations-graphically-game/sssss1re"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-linear-equations-graphically-game/sssss1re"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-linear-equations-graphically-game/sssss1re"/>
      <lastmod>2026-11-02T18:27:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/negative-scalar-multiplication-on-number-line-example-2/sssss1rv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-scalar-multiplication-on-number-line-example-2/sssss1rv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-scalar-multiplication-on-number-line-example-2/sssss1rv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-scalar-multiplication-on-number-line-example-2/sssss1rv"/>
      <lastmod>2026-11-01T23:51:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/negative-scalar-multiplication-on-number-line-example-2/sssss1rv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-scalar-multiplication-on-number-line-example-2/sssss1rv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-scalar-multiplication-on-number-line-example-2/sssss1rv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-scalar-multiplication-on-number-line-example-2/sssss1rv"/>
      <lastmod>2026-11-01T23:51:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyth-ratios-2/sssss1r4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyth-ratios-2/sssss1r4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyth-ratios-2/sssss1r4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyth-ratios-2/sssss1r4"/>
      <lastmod>2026-11-02T18:03:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyth-ratios-2/sssss1r4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyth-ratios-2/sssss1r4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyth-ratios-2/sssss1r4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyth-ratios-2/sssss1r4"/>
      <lastmod>2026-11-02T18:03:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-cross-section-demo/sssss1rl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-cross-section-demo/sssss1rl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-cross-section-demo/sssss1rl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-cross-section-demo/sssss1rl"/>
      <lastmod>2026-11-01T23:59:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-cross-section-demo/sssss1rl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-cross-section-demo/sssss1rl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-cross-section-demo/sssss1rl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-cross-section-demo/sssss1rl"/>
      <lastmod>2026-11-01T23:59:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-product-rule-activity-12-hl/sssss1ry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-product-rule-activity-12-hl/sssss1ry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-product-rule-activity-12-hl/sssss1ry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-product-rule-activity-12-hl/sssss1ry"/>
      <lastmod>2026-11-02T09:30:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-product-rule-activity-12-hl/sssss1ry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-product-rule-activity-12-hl/sssss1ry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-product-rule-activity-12-hl/sssss1ry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-product-rule-activity-12-hl/sssss1ry"/>
      <lastmod>2026-11-02T09:30:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-adjacent-angles-in-parallelograms/sssss1ra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-adjacent-angles-in-parallelograms/sssss1ra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-adjacent-angles-in-parallelograms/sssss1ra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-adjacent-angles-in-parallelograms/sssss1ra"/>
      <lastmod>2026-11-02T17:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-adjacent-angles-in-parallelograms/sssss1ra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-adjacent-angles-in-parallelograms/sssss1ra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-adjacent-angles-in-parallelograms/sssss1ra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-adjacent-angles-in-parallelograms/sssss1ra"/>
      <lastmod>2026-11-02T17:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gradient-vector-field/sssss1rc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-vector-field/sssss1rc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-vector-field/sssss1rc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-vector-field/sssss1rc"/>
      <lastmod>2026-11-02T17:50:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gradient-vector-field/sssss1rc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-vector-field/sssss1rc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-vector-field/sssss1rc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-vector-field/sssss1rc"/>
      <lastmod>2026-11-02T17:50:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-unit-vector-component-form-by-ben-roth/sssss1rr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-unit-vector-component-form-by-ben-roth/sssss1rr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-unit-vector-component-form-by-ben-roth/sssss1rr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-unit-vector-component-form-by-ben-roth/sssss1rr"/>
      <lastmod>2026-11-02T18:17:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-unit-vector-component-form-by-ben-roth/sssss1rr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-unit-vector-component-form-by-ben-roth/sssss1rr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-unit-vector-component-form-by-ben-roth/sssss1rr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-unit-vector-component-form-by-ben-roth/sssss1rr"/>
      <lastmod>2026-11-02T18:17:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-complex-number-addition/sssss1rh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-complex-number-addition/sssss1rh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-complex-number-addition/sssss1rh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-complex-number-addition/sssss1rh"/>
      <lastmod>2026-11-02T13:16:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-complex-number-addition/sssss1rh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-complex-number-addition/sssss1rh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-complex-number-addition/sssss1rh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-complex-number-addition/sssss1rh"/>
      <lastmod>2026-11-02T13:16:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-parts-demonstration-by-ren-ta-v-gov-2/sssss1rt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-parts-demonstration-by-ren-ta-v-gov-2/sssss1rt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-parts-demonstration-by-ren-ta-v-gov-2/sssss1rt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-parts-demonstration-by-ren-ta-v-gov-2/sssss1rt"/>
      <lastmod>2026-11-01T23:27:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-parts-demonstration-by-ren-ta-v-gov-2/sssss1rt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-parts-demonstration-by-ren-ta-v-gov-2/sssss1rt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-parts-demonstration-by-ren-ta-v-gov-2/sssss1rt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-parts-demonstration-by-ren-ta-v-gov-2/sssss1rt"/>
      <lastmod>2026-11-01T23:27:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-circle-by-infinitesimal-division/sssss1rx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-circle-by-infinitesimal-division/sssss1rx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-circle-by-infinitesimal-division/sssss1rx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-circle-by-infinitesimal-division/sssss1rx"/>
      <lastmod>2026-11-02T12:25:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-circle-by-infinitesimal-division/sssss1rx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-circle-by-infinitesimal-division/sssss1rx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-circle-by-infinitesimal-division/sssss1rx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-circle-by-infinitesimal-division/sssss1rx"/>
      <lastmod>2026-11-02T12:25:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-intersection-of-two-lines/sssss1ri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-intersection-of-two-lines/sssss1ri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-a-system-of-linear-equations-intersection-of-two-lines/sssss1ri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-intersection-of-two-lines/sssss1ri"/>
      <lastmod>2026-11-02T03:01:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-a-system-of-linear-equations-intersection-of-two-lines/sssss1ri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-intersection-of-two-lines/sssss1ri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-a-system-of-linear-equations-intersection-of-two-lines/sssss1ri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-intersection-of-two-lines/sssss1ri"/>
      <lastmod>2026-11-02T03:01:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/building-surfaces-with-cross-sections-and-function-modeling/sssss1ro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/building-surfaces-with-cross-sections-and-function-modeling/sssss1ro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/building-surfaces-with-cross-sections-and-function-modeling/sssss1ro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/building-surfaces-with-cross-sections-and-function-modeling/sssss1ro"/>
      <lastmod>2026-11-01T20:49:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/building-surfaces-with-cross-sections-and-function-modeling/sssss1ro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/building-surfaces-with-cross-sections-and-function-modeling/sssss1ro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/building-surfaces-with-cross-sections-and-function-modeling/sssss1ro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/building-surfaces-with-cross-sections-and-function-modeling/sssss1ro"/>
      <lastmod>2026-11-01T20:49:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-problem/sssss1hs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-problem/sssss1hs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-problem/sssss1hs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-problem/sssss1hs"/>
      <lastmod>2026-11-01T22:00:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-problem/sssss1hs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-problem/sssss1hs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-problem/sssss1hs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-problem/sssss1hs"/>
      <lastmod>2026-11-01T22:00:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-of-elevation-and-depression-by-lee-ka-hei/sssss1h7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-of-elevation-and-depression-by-lee-ka-hei/sssss1h7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-of-elevation-and-depression-by-lee-ka-hei/sssss1h7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-of-elevation-and-depression-by-lee-ka-hei/sssss1h7"/>
      <lastmod>2026-11-02T17:04:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-of-elevation-and-depression-by-lee-ka-hei/sssss1h7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-of-elevation-and-depression-by-lee-ka-hei/sssss1h7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-of-elevation-and-depression-by-lee-ka-hei/sssss1h7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-of-elevation-and-depression-by-lee-ka-hei/sssss1h7"/>
      <lastmod>2026-11-02T17:04:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-by-ashmita/sssss1hn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-by-ashmita/sssss1hn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-by-ashmita/sssss1hn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-by-ashmita/sssss1hn"/>
      <lastmod>2026-11-02T09:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-by-ashmita/sssss1hn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-by-ashmita/sssss1hn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-by-ashmita/sssss1hn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-by-ashmita/sssss1hn"/>
      <lastmod>2026-11-02T09:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lines-of-symmetry-by-renert-school/sssss1h2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-of-symmetry-by-renert-school/sssss1h2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-of-symmetry-by-renert-school/sssss1h2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-of-symmetry-by-renert-school/sssss1h2"/>
      <lastmod>2026-11-01T23:14:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lines-of-symmetry-by-renert-school/sssss1h2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-of-symmetry-by-renert-school/sssss1h2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-of-symmetry-by-renert-school/sssss1h2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-of-symmetry-by-renert-school/sssss1h2"/>
      <lastmod>2026-11-01T23:14:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-and-tetrahedrons/sssss1hk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-tetrahedrons/sssss1hk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-tetrahedrons/sssss1hk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-tetrahedrons/sssss1hk"/>
      <lastmod>2026-11-02T17:06:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-and-tetrahedrons/sssss1hk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-tetrahedrons/sssss1hk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-tetrahedrons/sssss1hk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-tetrahedrons/sssss1hk"/>
      <lastmod>2026-11-02T17:06:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-and-tangent-line-intersection-demo/sssss1hz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-tangent-line-intersection-demo/sssss1hz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-tangent-line-intersection-demo/sssss1hz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-tangent-line-intersection-demo/sssss1hz"/>
      <lastmod>2026-11-01T21:52:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-and-tangent-line-intersection-demo/sssss1hz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-tangent-line-intersection-demo/sssss1hz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-tangent-line-intersection-demo/sssss1hz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-tangent-line-intersection-demo/sssss1hz"/>
      <lastmod>2026-11-01T21:52:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-net-diagram/sssss1h0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net-diagram/sssss1h0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net-diagram/sssss1h0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net-diagram/sssss1h0"/>
      <lastmod>2026-11-02T07:34:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-net-diagram/sssss1h0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net-diagram/sssss1h0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net-diagram/sssss1h0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net-diagram/sssss1h0"/>
      <lastmod>2026-11-02T07:34:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-and-addition-challenge/sssss1hd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-and-addition-challenge/sssss1hd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-and-addition-challenge/sssss1hd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-and-addition-challenge/sssss1hd"/>
      <lastmod>2026-11-02T18:26:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-and-addition-challenge/sssss1hd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-and-addition-challenge/sssss1hd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-and-addition-challenge/sssss1hd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-and-addition-challenge/sssss1hd"/>
      <lastmod>2026-11-02T18:26:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/center-and-spread-problems/sssss1hf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-and-spread-problems/sssss1hf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-and-spread-problems/sssss1hf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-and-spread-problems/sssss1hf"/>
      <lastmod>2026-11-02T17:40:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/center-and-spread-problems/sssss1hf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-and-spread-problems/sssss1hf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-and-spread-problems/sssss1hf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-and-spread-problems/sssss1hf"/>
      <lastmod>2026-11-02T17:40:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-and-geometric-transformation-demo-by-abdul-latiff/sssss1h8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-geometric-transformation-demo-by-abdul-latiff/sssss1h8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-geometric-transformation-demo-by-abdul-latiff/sssss1h8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-geometric-transformation-demo-by-abdul-latiff/sssss1h8"/>
      <lastmod>2026-11-01T19:29:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-and-geometric-transformation-demo-by-abdul-latiff/sssss1h8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-geometric-transformation-demo-by-abdul-latiff/sssss1h8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-geometric-transformation-demo-by-abdul-latiff/sssss1h8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-geometric-transformation-demo-by-abdul-latiff/sssss1h8"/>
      <lastmod>2026-11-01T19:29:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inequalities-in-scalene-triangles/sssss1hu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-in-scalene-triangles/sssss1hu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-in-scalene-triangles/sssss1hu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-in-scalene-triangles/sssss1hu"/>
      <lastmod>2026-11-02T15:33:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inequalities-in-scalene-triangles/sssss1hu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-in-scalene-triangles/sssss1hu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-in-scalene-triangles/sssss1hu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-in-scalene-triangles/sssss1hu"/>
      <lastmod>2026-11-02T15:33:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformation-of-quadrilateral/sssss1h5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformation-of-quadrilateral/sssss1h5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformation-of-quadrilateral/sssss1h5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformation-of-quadrilateral/sssss1h5"/>
      <lastmod>2026-11-01T21:50:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformation-of-quadrilateral/sssss1h5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformation-of-quadrilateral/sssss1h5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformation-of-quadrilateral/sssss1h5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformation-of-quadrilateral/sssss1h5"/>
      <lastmod>2026-11-01T21:50:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/height-and-volume-dynamic-filling-experiment-for-cylinder-volume/sssss1hb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/height-and-volume-dynamic-filling-experiment-for-cylinder-volume/sssss1hb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/height-and-volume-dynamic-filling-experiment-for-cylinder-volume/sssss1hb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/height-and-volume-dynamic-filling-experiment-for-cylinder-volume/sssss1hb"/>
      <lastmod>2026-11-02T03:17:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/height-and-volume-dynamic-filling-experiment-for-cylinder-volume/sssss1hb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/height-and-volume-dynamic-filling-experiment-for-cylinder-volume/sssss1hb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/height-and-volume-dynamic-filling-experiment-for-cylinder-volume/sssss1hb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/height-and-volume-dynamic-filling-experiment-for-cylinder-volume/sssss1hb"/>
      <lastmod>2026-11-02T03:17:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-dilations/sssss1h3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-dilations/sssss1h3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-dilations/sssss1h3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-dilations/sssss1h3"/>
      <lastmod>2026-11-01T20:56:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-dilations/sssss1h3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-dilations/sssss1h3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-dilations/sssss1h3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-dilations/sssss1h3"/>
      <lastmod>2026-11-01T20:56:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangles/sssss1hq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangles/sssss1hq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangles/sssss1hq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangles/sssss1hq"/>
      <lastmod>2026-11-02T13:55:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangles/sssss1hq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangles/sssss1hq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangles/sssss1hq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangles/sssss1hq"/>
      <lastmod>2026-11-02T13:55:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-vectors-to-a-parametrized-surface/sssss1h1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-vectors-to-a-parametrized-surface/sssss1h1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-vectors-to-a-parametrized-surface/sssss1h1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-vectors-to-a-parametrized-surface/sssss1h1"/>
      <lastmod>2026-11-02T15:30:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-vectors-to-a-parametrized-surface/sssss1h1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-vectors-to-a-parametrized-surface/sssss1h1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-vectors-to-a-parametrized-surface/sssss1h1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-vectors-to-a-parametrized-surface/sssss1h1"/>
      <lastmod>2026-11-02T15:30:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-with-diagonals/sssss1hm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-with-diagonals/sssss1hm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-with-diagonals/sssss1hm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-with-diagonals/sssss1hm"/>
      <lastmod>2026-11-02T00:21:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-with-diagonals/sssss1hm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-with-diagonals/sssss1hm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-with-diagonals/sssss1hm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-with-diagonals/sssss1hm"/>
      <lastmod>2026-11-02T00:21:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/incenter-of-a-triangle-construction-of-the-incircle/sssss1hj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incenter-of-a-triangle-construction-of-the-incircle/sssss1hj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incenter-of-a-triangle-construction-of-the-incircle/sssss1hj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incenter-of-a-triangle-construction-of-the-incircle/sssss1hj"/>
      <lastmod>2026-11-02T09:54:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/incenter-of-a-triangle-construction-of-the-incircle/sssss1hj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incenter-of-a-triangle-construction-of-the-incircle/sssss1hj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incenter-of-a-triangle-construction-of-the-incircle/sssss1hj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incenter-of-a-triangle-construction-of-the-incircle/sssss1hj"/>
      <lastmod>2026-11-02T09:54:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-over-a-circle/sssss1hp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-over-a-circle/sssss1hp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-over-a-circle/sssss1hp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-over-a-circle/sssss1hp"/>
      <lastmod>2026-11-01T21:14:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-over-a-circle/sssss1hp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-over-a-circle/sssss1hp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-over-a-circle/sssss1hp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-over-a-circle/sssss1hp"/>
      <lastmod>2026-11-01T21:14:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-wondrous-journey-of-a-square-wheel/sssss1hw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-wondrous-journey-of-a-square-wheel/sssss1hw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-wondrous-journey-of-a-square-wheel/sssss1hw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-wondrous-journey-of-a-square-wheel/sssss1hw"/>
      <lastmod>2026-11-02T17:38:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-wondrous-journey-of-a-square-wheel/sssss1hw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-wondrous-journey-of-a-square-wheel/sssss1hw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-wondrous-journey-of-a-square-wheel/sssss1hw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-wondrous-journey-of-a-square-wheel/sssss1hw"/>
      <lastmod>2026-11-02T17:38:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-bars-demonstration/sssss1h6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-bars-demonstration/sssss1h6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-bars-demonstration/sssss1h6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-bars-demonstration/sssss1h6"/>
      <lastmod>2026-11-02T03:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-bars-demonstration/sssss1h6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-bars-demonstration/sssss1h6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-bars-demonstration/sssss1h6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-bars-demonstration/sssss1h6"/>
      <lastmod>2026-11-02T03:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/180-degree-counterclockwise-rotation/sssss1hg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/180-degree-counterclockwise-rotation/sssss1hg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/180-degree-counterclockwise-rotation/sssss1hg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/180-degree-counterclockwise-rotation/sssss1hg"/>
      <lastmod>2026-11-02T18:17:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/180-degree-counterclockwise-rotation/sssss1hg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/180-degree-counterclockwise-rotation/sssss1hg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/180-degree-counterclockwise-rotation/sssss1hg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/180-degree-counterclockwise-rotation/sssss1hg"/>
      <lastmod>2026-11-02T18:17:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/more-linear-relationships/sssss1h9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/more-linear-relationships/sssss1h9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/more-linear-relationships/sssss1h9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/more-linear-relationships/sssss1h9"/>
      <lastmod>2026-11-02T10:37:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/more-linear-relationships/sssss1h9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/more-linear-relationships/sssss1h9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/more-linear-relationships/sssss1h9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/more-linear-relationships/sssss1h9"/>
      <lastmod>2026-11-02T10:37:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-meaning-of-product-of-irrational-numbers/sssss1he</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-product-of-irrational-numbers/sssss1he"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-meaning-of-product-of-irrational-numbers/sssss1he"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-product-of-irrational-numbers/sssss1he"/>
      <lastmod>2026-11-01T23:52:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-meaning-of-product-of-irrational-numbers/sssss1he</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-product-of-irrational-numbers/sssss1he"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-meaning-of-product-of-irrational-numbers/sssss1he"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-product-of-irrational-numbers/sssss1he"/>
      <lastmod>2026-11-01T23:52:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/centroid-orthocenter-and-circumcenter/sssss1hv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-orthocenter-and-circumcenter/sssss1hv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-orthocenter-and-circumcenter/sssss1hv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-orthocenter-and-circumcenter/sssss1hv"/>
      <lastmod>2026-11-02T03:01:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/centroid-orthocenter-and-circumcenter/sssss1hv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-orthocenter-and-circumcenter/sssss1hv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-orthocenter-and-circumcenter/sssss1hv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-orthocenter-and-circumcenter/sssss1hv"/>
      <lastmod>2026-11-02T03:01:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directional-derivatives-demo-by-wuguoning/sssss1h4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivatives-demo-by-wuguoning/sssss1h4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivatives-demo-by-wuguoning/sssss1h4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivatives-demo-by-wuguoning/sssss1h4"/>
      <lastmod>2026-11-01T19:26:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directional-derivatives-demo-by-wuguoning/sssss1h4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivatives-demo-by-wuguoning/sssss1h4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivatives-demo-by-wuguoning/sssss1h4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivatives-demo-by-wuguoning/sssss1h4"/>
      <lastmod>2026-11-01T19:26:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-quadrilaterals/sssss1hl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-quadrilaterals/sssss1hl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-quadrilaterals/sssss1hl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-quadrilaterals/sssss1hl"/>
      <lastmod>2026-11-01T23:11:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-quadrilaterals/sssss1hl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-quadrilaterals/sssss1hl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-quadrilaterals/sssss1hl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-quadrilaterals/sssss1hl"/>
      <lastmod>2026-11-01T23:11:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-visualization-of-trigonometric-functions-and-the-unit-circle/sssss1hy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-trigonometric-functions-and-the-unit-circle/sssss1hy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-visualization-of-trigonometric-functions-and-the-unit-circle/sssss1hy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-trigonometric-functions-and-the-unit-circle/sssss1hy"/>
      <lastmod>2026-11-02T13:17:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-visualization-of-trigonometric-functions-and-the-unit-circle/sssss1hy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-trigonometric-functions-and-the-unit-circle/sssss1hy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-visualization-of-trigonometric-functions-and-the-unit-circle/sssss1hy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-visualization-of-trigonometric-functions-and-the-unit-circle/sssss1hy"/>
      <lastmod>2026-11-02T13:17:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-construction/sssss1ha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-construction/sssss1ha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-construction/sssss1ha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-construction/sssss1ha"/>
      <lastmod>2026-11-01T21:22:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-construction/sssss1ha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-construction/sssss1ha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-construction/sssss1ha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-construction/sssss1ha"/>
      <lastmod>2026-11-01T21:22:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-solver-formative-assessment-tool/sssss1hc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-solver-formative-assessment-tool/sssss1hc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-solver-formative-assessment-tool/sssss1hc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-solver-formative-assessment-tool/sssss1hc"/>
      <lastmod>2026-11-02T00:15:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-solver-formative-assessment-tool/sssss1hc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-solver-formative-assessment-tool/sssss1hc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-solver-formative-assessment-tool/sssss1hc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-solver-formative-assessment-tool/sssss1hc"/>
      <lastmod>2026-11-02T00:15:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-function-and-derivative/sssss1hr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-function-and-derivative/sssss1hr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-function-and-derivative/sssss1hr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-function-and-derivative/sssss1hr"/>
      <lastmod>2026-11-02T16:43:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-function-and-derivative/sssss1hr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-function-and-derivative/sssss1hr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-function-and-derivative/sssss1hr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-function-and-derivative/sssss1hr"/>
      <lastmod>2026-11-02T16:43:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modular-addition-in-a-triangle/sssss1hh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modular-addition-in-a-triangle/sssss1hh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modular-addition-in-a-triangle/sssss1hh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modular-addition-in-a-triangle/sssss1hh"/>
      <lastmod>2026-11-02T14:53:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modular-addition-in-a-triangle/sssss1hh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modular-addition-in-a-triangle/sssss1hh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modular-addition-in-a-triangle/sssss1hh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modular-addition-in-a-triangle/sssss1hh"/>
      <lastmod>2026-11-02T14:53:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-measurement-degree-to-radian/sssss1ht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-measurement-degree-to-radian/sssss1ht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-measurement-degree-to-radian/sssss1ht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-measurement-degree-to-radian/sssss1ht"/>
      <lastmod>2026-11-02T12:24:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-measurement-degree-to-radian/sssss1ht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-measurement-degree-to-radian/sssss1ht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-measurement-degree-to-radian/sssss1ht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-measurement-degree-to-radian/sssss1ht"/>
      <lastmod>2026-11-02T12:24:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-of-x-2-ay/sssss1hx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-of-x-2-ay/sssss1hx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-of-x-2-ay/sssss1hx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-of-x-2-ay/sssss1hx"/>
      <lastmod>2026-11-02T16:47:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-of-x-2-ay/sssss1hx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-of-x-2-ay/sssss1hx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-of-x-2-ay/sssss1hx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-of-x-2-ay/sssss1hx"/>
      <lastmod>2026-11-02T16:47:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-cylinder/sssss1hi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-cylinder/sssss1hi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-cylinder/sssss1hi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-cylinder/sssss1hi"/>
      <lastmod>2026-11-02T16:48:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-cylinder/sssss1hi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-cylinder/sssss1hi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-cylinder/sssss1hi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-cylinder/sssss1hi"/>
      <lastmod>2026-11-02T16:48:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-intercept-form-activity/sssss1ho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-intercept-form-activity/sssss1ho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-intercept-form-activity/sssss1ho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-intercept-form-activity/sssss1ho"/>
      <lastmod>2026-11-01T19:35:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-intercept-form-activity/sssss1ho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-intercept-form-activity/sssss1ho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-intercept-form-activity/sssss1ho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-intercept-form-activity/sssss1ho"/>
      <lastmod>2026-11-01T19:35:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-p-on-line-segment/sssss1ts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-p-on-line-segment/sssss1ts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-p-on-line-segment/sssss1ts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-p-on-line-segment/sssss1ts"/>
      <lastmod>2026-11-01T23:36:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-p-on-line-segment/sssss1ts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-p-on-line-segment/sssss1ts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-p-on-line-segment/sssss1ts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-p-on-line-segment/sssss1ts"/>
      <lastmod>2026-11-01T23:36:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sir-model-for-example-of-covid-19/sssss1t7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sir-model-for-example-of-covid-19/sssss1t7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sir-model-for-example-of-covid-19/sssss1t7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sir-model-for-example-of-covid-19/sssss1t7"/>
      <lastmod>2026-11-01T20:47:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sir-model-for-example-of-covid-19/sssss1t7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sir-model-for-example-of-covid-19/sssss1t7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sir-model-for-example-of-covid-19/sssss1t7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sir-model-for-example-of-covid-19/sssss1t7"/>
      <lastmod>2026-11-01T20:47:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-3d-calculator-activity-template/sssss1tn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-3d-calculator-activity-template/sssss1tn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-3d-calculator-activity-template/sssss1tn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-3d-calculator-activity-template/sssss1tn"/>
      <lastmod>2026-11-01T19:09:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-3d-calculator-activity-template/sssss1tn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-3d-calculator-activity-template/sssss1tn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-3d-calculator-activity-template/sssss1tn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-3d-calculator-activity-template/sssss1tn"/>
      <lastmod>2026-11-01T19:09:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geoboard-geometric-construction-example/sssss1t2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geoboard-geometric-construction-example/sssss1t2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geoboard-geometric-construction-example/sssss1t2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geoboard-geometric-construction-example/sssss1t2"/>
      <lastmod>2026-11-01T21:29:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geoboard-geometric-construction-example/sssss1t2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geoboard-geometric-construction-example/sssss1t2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geoboard-geometric-construction-example/sssss1t2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geoboard-geometric-construction-example/sssss1t2"/>
      <lastmod>2026-11-01T21:29:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-vector-magnitude/sssss1tk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vector-magnitude/sssss1tk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vector-magnitude/sssss1tk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vector-magnitude/sssss1tk"/>
      <lastmod>2026-11-02T15:04:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-vector-magnitude/sssss1tk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vector-magnitude/sssss1tk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vector-magnitude/sssss1tk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vector-magnitude/sssss1tk"/>
      <lastmod>2026-11-02T15:04:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-calculation-quiz-by-corey-rasmussen/sssss1tz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-calculation-quiz-by-corey-rasmussen/sssss1tz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-calculation-quiz-by-corey-rasmussen/sssss1tz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-calculation-quiz-by-corey-rasmussen/sssss1tz"/>
      <lastmod>2026-11-01T21:19:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-calculation-quiz-by-corey-rasmussen/sssss1tz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-calculation-quiz-by-corey-rasmussen/sssss1tz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-calculation-quiz-by-corey-rasmussen/sssss1tz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-calculation-quiz-by-corey-rasmussen/sssss1tz"/>
      <lastmod>2026-11-01T21:19:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hundredths-disk/sssss1t0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hundredths-disk/sssss1t0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hundredths-disk/sssss1t0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hundredths-disk/sssss1t0"/>
      <lastmod>2026-11-02T18:56:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hundredths-disk/sssss1t0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hundredths-disk/sssss1t0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hundredths-disk/sssss1t0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hundredths-disk/sssss1t0"/>
      <lastmod>2026-11-02T18:56:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angles-of-regular-polygons-by-tom-walsh/sssss1td</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-regular-polygons-by-tom-walsh/sssss1td"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-regular-polygons-by-tom-walsh/sssss1td"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-regular-polygons-by-tom-walsh/sssss1td"/>
      <lastmod>2026-11-02T00:15:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angles-of-regular-polygons-by-tom-walsh/sssss1td</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-regular-polygons-by-tom-walsh/sssss1td"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-regular-polygons-by-tom-walsh/sssss1td"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-regular-polygons-by-tom-walsh/sssss1td"/>
      <lastmod>2026-11-02T00:15:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-example-by-aubrey-2/sssss1tf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-aubrey-2/sssss1tf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-example-by-aubrey-2/sssss1tf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-aubrey-2/sssss1tf"/>
      <lastmod>2026-11-02T02:20:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-example-by-aubrey-2/sssss1tf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-aubrey-2/sssss1tf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-example-by-aubrey-2/sssss1tf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-aubrey-2/sssss1tf"/>
      <lastmod>2026-11-02T02:20:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-with-multiplication-factor-dynamic-demo/sssss1t8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-with-multiplication-factor-dynamic-demo/sssss1t8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-with-multiplication-factor-dynamic-demo/sssss1t8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-with-multiplication-factor-dynamic-demo/sssss1t8"/>
      <lastmod>2026-11-01T21:14:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-with-multiplication-factor-dynamic-demo/sssss1t8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-with-multiplication-factor-dynamic-demo/sssss1t8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-with-multiplication-factor-dynamic-demo/sssss1t8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-with-multiplication-factor-dynamic-demo/sssss1t8"/>
      <lastmod>2026-11-01T21:14:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-construction/sssss1tu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-construction/sssss1tu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-construction/sssss1tu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-construction/sssss1tu"/>
      <lastmod>2026-11-02T10:56:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-construction/sssss1tu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-construction/sssss1tu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-construction/sssss1tu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-construction/sssss1tu"/>
      <lastmod>2026-11-02T10:56:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-and-hours/sssss1t5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-and-hours/sssss1t5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-and-hours/sssss1t5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-and-hours/sssss1t5"/>
      <lastmod>2026-11-01T19:11:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-and-hours/sssss1t5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-and-hours/sssss1t5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-and-hours/sssss1t5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-and-hours/sssss1t5"/>
      <lastmod>2026-11-01T19:11:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/doubles-or-evens/sssss1tb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/doubles-or-evens/sssss1tb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/doubles-or-evens/sssss1tb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/doubles-or-evens/sssss1tb"/>
      <lastmod>2026-11-02T18:32:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/doubles-or-evens/sssss1tb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/doubles-or-evens/sssss1tb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/doubles-or-evens/sssss1tb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/doubles-or-evens/sssss1tb"/>
      <lastmod>2026-11-02T18:32:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regression-correlation-and-hypothesis-testing/sssss1t3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regression-correlation-and-hypothesis-testing/sssss1t3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regression-correlation-and-hypothesis-testing/sssss1t3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regression-correlation-and-hypothesis-testing/sssss1t3"/>
      <lastmod>2026-11-02T15:36:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regression-correlation-and-hypothesis-testing/sssss1t3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regression-correlation-and-hypothesis-testing/sssss1t3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regression-correlation-and-hypothesis-testing/sssss1t3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regression-correlation-and-hypothesis-testing/sssss1t3"/>
      <lastmod>2026-11-02T15:36:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/functions-rectangle-in-semi-circle/sssss1tq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-rectangle-in-semi-circle/sssss1tq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-rectangle-in-semi-circle/sssss1tq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-rectangle-in-semi-circle/sssss1tq"/>
      <lastmod>2026-11-01T23:56:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/functions-rectangle-in-semi-circle/sssss1tq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-rectangle-in-semi-circle/sssss1tq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-rectangle-in-semi-circle/sssss1tq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-rectangle-in-semi-circle/sssss1tq"/>
      <lastmod>2026-11-01T23:56:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euclidean-rotation-in-taxicab-geometry/sssss1t1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euclidean-rotation-in-taxicab-geometry/sssss1t1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euclidean-rotation-in-taxicab-geometry/sssss1t1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euclidean-rotation-in-taxicab-geometry/sssss1t1"/>
      <lastmod>2026-11-02T02:16:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euclidean-rotation-in-taxicab-geometry/sssss1t1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euclidean-rotation-in-taxicab-geometry/sssss1t1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euclidean-rotation-in-taxicab-geometry/sssss1t1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euclidean-rotation-in-taxicab-geometry/sssss1t1"/>
      <lastmod>2026-11-02T02:16:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-angles/sssss1tm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-angles/sssss1tm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-angles/sssss1tm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-angles/sssss1tm"/>
      <lastmod>2026-11-02T16:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-angles/sssss1tm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-angles/sssss1tm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-angles/sssss1tm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-angles/sssss1tm"/>
      <lastmod>2026-11-02T16:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-by-steve-phelps/sssss1tj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-steve-phelps/sssss1tj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-by-steve-phelps/sssss1tj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-steve-phelps/sssss1tj"/>
      <lastmod>2026-11-01T21:44:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-by-steve-phelps/sssss1tj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-steve-phelps/sssss1tj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-by-steve-phelps/sssss1tj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-steve-phelps/sssss1tj"/>
      <lastmod>2026-11-01T21:44:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/motion-symmetry-preserving-the-mass-centre/sssss1tp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/motion-symmetry-preserving-the-mass-centre/sssss1tp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/motion-symmetry-preserving-the-mass-centre/sssss1tp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/motion-symmetry-preserving-the-mass-centre/sssss1tp"/>
      <lastmod>2026-11-02T16:52:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/motion-symmetry-preserving-the-mass-centre/sssss1tp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/motion-symmetry-preserving-the-mass-centre/sssss1tp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/motion-symmetry-preserving-the-mass-centre/sssss1tp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/motion-symmetry-preserving-the-mass-centre/sssss1tp"/>
      <lastmod>2026-11-02T16:52:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-rectangular-prism-by-irina-lyublinskaya/sssss1tw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-rectangular-prism-by-irina-lyublinskaya/sssss1tw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-rectangular-prism-by-irina-lyublinskaya/sssss1tw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-rectangular-prism-by-irina-lyublinskaya/sssss1tw"/>
      <lastmod>2026-11-01T21:21:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-rectangular-prism-by-irina-lyublinskaya/sssss1tw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-rectangular-prism-by-irina-lyublinskaya/sssss1tw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-rectangular-prism-by-irina-lyublinskaya/sssss1tw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-rectangular-prism-by-irina-lyublinskaya/sssss1tw"/>
      <lastmod>2026-11-01T21:21:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-number-line-for-percent-change/sssss1t6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-number-line-for-percent-change/sssss1t6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-number-line-for-percent-change/sssss1t6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-number-line-for-percent-change/sssss1t6"/>
      <lastmod>2026-11-02T16:51:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-number-line-for-percent-change/sssss1t6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-number-line-for-percent-change/sssss1t6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-number-line-for-percent-change/sssss1t6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-number-line-for-percent-change/sssss1t6"/>
      <lastmod>2026-11-02T16:51:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/aa-similarity-theorem-proof-by-mrs-cole/sssss1tg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aa-similarity-theorem-proof-by-mrs-cole/sssss1tg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aa-similarity-theorem-proof-by-mrs-cole/sssss1tg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aa-similarity-theorem-proof-by-mrs-cole/sssss1tg"/>
      <lastmod>2026-11-02T02:45:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/aa-similarity-theorem-proof-by-mrs-cole/sssss1tg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aa-similarity-theorem-proof-by-mrs-cole/sssss1tg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aa-similarity-theorem-proof-by-mrs-cole/sssss1tg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aa-similarity-theorem-proof-by-mrs-cole/sssss1tg"/>
      <lastmod>2026-11-02T02:45:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fresnel-elastic-surface/sssss1t9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fresnel-elastic-surface/sssss1t9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fresnel-elastic-surface/sssss1t9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fresnel-elastic-surface/sssss1t9"/>
      <lastmod>2026-11-02T15:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fresnel-elastic-surface/sssss1t9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fresnel-elastic-surface/sssss1t9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fresnel-elastic-surface/sssss1t9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fresnel-elastic-surface/sssss1t9"/>
      <lastmod>2026-11-02T15:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-and-perimeter-of-square-rectangle/sssss1te</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-square-rectangle/sssss1te"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-square-rectangle/sssss1te"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-square-rectangle/sssss1te"/>
      <lastmod>2026-11-01T19:07:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-and-perimeter-of-square-rectangle/sssss1te</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-square-rectangle/sssss1te"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-square-rectangle/sssss1te"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-square-rectangle/sssss1te"/>
      <lastmod>2026-11-01T19:07:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curve-sketching-using-first-and-second-derivatives/sssss1tv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-sketching-using-first-and-second-derivatives/sssss1tv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-sketching-using-first-and-second-derivatives/sssss1tv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-sketching-using-first-and-second-derivatives/sssss1tv"/>
      <lastmod>2026-11-01T21:33:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curve-sketching-using-first-and-second-derivatives/sssss1tv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-sketching-using-first-and-second-derivatives/sssss1tv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-sketching-using-first-and-second-derivatives/sssss1tv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-sketching-using-first-and-second-derivatives/sssss1tv"/>
      <lastmod>2026-11-01T21:33:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-probability-curve-demonstration/sssss1t4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-probability-curve-demonstration/sssss1t4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-probability-curve-demonstration/sssss1t4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-probability-curve-demonstration/sssss1t4"/>
      <lastmod>2026-11-02T16:37:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-probability-curve-demonstration/sssss1t4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-probability-curve-demonstration/sssss1t4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-probability-curve-demonstration/sssss1t4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-probability-curve-demonstration/sssss1t4"/>
      <lastmod>2026-11-02T16:37:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-dilation-with-animation/sssss1tl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-dilation-with-animation/sssss1tl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-dilation-with-animation/sssss1tl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-dilation-with-animation/sssss1tl"/>
      <lastmod>2026-11-01T19:25:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-dilation-with-animation/sssss1tl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-dilation-with-animation/sssss1tl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-dilation-with-animation/sssss1tl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-dilation-with-animation/sssss1tl"/>
      <lastmod>2026-11-01T19:25:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-three-overlapping-circles-by-david-wees/sssss1ty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-three-overlapping-circles-by-david-wees/sssss1ty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-three-overlapping-circles-by-david-wees/sssss1ty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-three-overlapping-circles-by-david-wees/sssss1ty"/>
      <lastmod>2026-11-02T02:54:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-three-overlapping-circles-by-david-wees/sssss1ty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-three-overlapping-circles-by-david-wees/sssss1ty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-three-overlapping-circles-by-david-wees/sssss1ty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-three-overlapping-circles-by-david-wees/sssss1ty"/>
      <lastmod>2026-11-02T02:54:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/write-equation-of-a-line-given-slope-point/sssss1ta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-equation-of-a-line-given-slope-point/sssss1ta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-equation-of-a-line-given-slope-point/sssss1ta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-equation-of-a-line-given-slope-point/sssss1ta"/>
      <lastmod>2026-11-01T21:37:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/write-equation-of-a-line-given-slope-point/sssss1ta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-equation-of-a-line-given-slope-point/sssss1ta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-equation-of-a-line-given-slope-point/sssss1ta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-equation-of-a-line-given-slope-point/sssss1ta"/>
      <lastmod>2026-11-01T21:37:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-statistics/sssss1tc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-statistics/sssss1tc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-statistics/sssss1tc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-statistics/sssss1tc"/>
      <lastmod>2026-11-01T23:37:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-statistics/sssss1tc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-statistics/sssss1tc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-statistics/sssss1tc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-statistics/sssss1tc"/>
      <lastmod>2026-11-01T23:37:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/klein-s-bottle/sssss1tr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/klein-s-bottle/sssss1tr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/klein-s-bottle/sssss1tr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/klein-s-bottle/sssss1tr"/>
      <lastmod>2026-11-02T18:37:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/klein-s-bottle/sssss1tr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/klein-s-bottle/sssss1tr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/klein-s-bottle/sssss1tr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/klein-s-bottle/sssss1tr"/>
      <lastmod>2026-11-02T18:37:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-properties-of-polygons/sssss1th</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-properties-of-polygons/sssss1th"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-properties-of-polygons/sssss1th"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-properties-of-polygons/sssss1th"/>
      <lastmod>2026-11-02T12:45:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-properties-of-polygons/sssss1th</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-properties-of-polygons/sssss1th"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-properties-of-polygons/sssss1th"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-properties-of-polygons/sssss1th"/>
      <lastmod>2026-11-02T12:45:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mapping-diagram-complex-integration-of-1-z/sssss1tt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagram-complex-integration-of-1-z/sssss1tt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagram-complex-integration-of-1-z/sssss1tt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagram-complex-integration-of-1-z/sssss1tt"/>
      <lastmod>2026-11-02T18:13:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mapping-diagram-complex-integration-of-1-z/sssss1tt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagram-complex-integration-of-1-z/sssss1tt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagram-complex-integration-of-1-z/sssss1tt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagram-complex-integration-of-1-z/sssss1tt"/>
      <lastmod>2026-11-02T18:13:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-angle-similarity-theorem-demo/sssss1tx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-angle-similarity-theorem-demo/sssss1tx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-angle-similarity-theorem-demo/sssss1tx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-angle-similarity-theorem-demo/sssss1tx"/>
      <lastmod>2026-11-01T19:21:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-angle-similarity-theorem-demo/sssss1tx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-angle-similarity-theorem-demo/sssss1tx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-angle-similarity-theorem-demo/sssss1tx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-angle-similarity-theorem-demo/sssss1tx"/>
      <lastmod>2026-11-01T19:21:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-vectors-and-reflection-symmetry/sssss1ti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vectors-and-reflection-symmetry/sssss1ti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vectors-and-reflection-symmetry/sssss1ti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vectors-and-reflection-symmetry/sssss1ti"/>
      <lastmod>2026-11-01T19:22:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-vectors-and-reflection-symmetry/sssss1ti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vectors-and-reflection-symmetry/sssss1ti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vectors-and-reflection-symmetry/sssss1ti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vectors-and-reflection-symmetry/sssss1ti"/>
      <lastmod>2026-11-01T19:22:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-geometry-activity/sssss1to</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-geometry-activity/sssss1to"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-geometry-activity/sssss1to"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-geometry-activity/sssss1to"/>
      <lastmod>2026-11-02T13:35:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-geometry-activity/sssss1to</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-geometry-activity/sssss1to"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-geometry-activity/sssss1to"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-geometry-activity/sssss1to"/>
      <lastmod>2026-11-02T13:35:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-pyramid-as-a-planar-graph/sssss1xs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid-as-a-planar-graph/sssss1xs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid-as-a-planar-graph/sssss1xs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid-as-a-planar-graph/sssss1xs"/>
      <lastmod>2026-11-02T18:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-pyramid-as-a-planar-graph/sssss1xs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid-as-a-planar-graph/sssss1xs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid-as-a-planar-graph/sssss1xs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid-as-a-planar-graph/sssss1xs"/>
      <lastmod>2026-11-02T18:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/degrees-and-radians-on-a-unit-circle/sssss1x7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/degrees-and-radians-on-a-unit-circle/sssss1x7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/degrees-and-radians-on-a-unit-circle/sssss1x7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/degrees-and-radians-on-a-unit-circle/sssss1x7"/>
      <lastmod>2026-11-02T09:31:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/degrees-and-radians-on-a-unit-circle/sssss1x7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/degrees-and-radians-on-a-unit-circle/sssss1x7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/degrees-and-radians-on-a-unit-circle/sssss1x7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/degrees-and-radians-on-a-unit-circle/sssss1x7"/>
      <lastmod>2026-11-02T09:31:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-spirograph/sssss1xn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-spirograph/sssss1xn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-spirograph/sssss1xn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-spirograph/sssss1xn"/>
      <lastmod>2026-11-01T21:07:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-spirograph/sssss1xn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-spirograph/sssss1xn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-spirograph/sssss1xn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-spirograph/sssss1xn"/>
      <lastmod>2026-11-01T21:07:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-quadratic-functions-using-a-table-of-values/sssss1x2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-quadratic-functions-using-a-table-of-values/sssss1x2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-quadratic-functions-using-a-table-of-values/sssss1x2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-quadratic-functions-using-a-table-of-values/sssss1x2"/>
      <lastmod>2026-11-02T02:34:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-quadratic-functions-using-a-table-of-values/sssss1x2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-quadratic-functions-using-a-table-of-values/sssss1x2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-quadratic-functions-using-a-table-of-values/sssss1x2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-quadratic-functions-using-a-table-of-values/sssss1x2"/>
      <lastmod>2026-11-02T02:34:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shapes-with-the-same-perimeter/sssss1xk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shapes-with-the-same-perimeter/sssss1xk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shapes-with-the-same-perimeter/sssss1xk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shapes-with-the-same-perimeter/sssss1xk"/>
      <lastmod>2026-11-02T16:51:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shapes-with-the-same-perimeter/sssss1xk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shapes-with-the-same-perimeter/sssss1xk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shapes-with-the-same-perimeter/sssss1xk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shapes-with-the-same-perimeter/sssss1xk"/>
      <lastmod>2026-11-02T16:51:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-and-sequence-construction/sssss1xz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-and-sequence-construction/sssss1xz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-and-sequence-construction/sssss1xz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-and-sequence-construction/sssss1xz"/>
      <lastmod>2026-11-02T12:03:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-and-sequence-construction/sssss1xz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-and-sequence-construction/sssss1xz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-and-sequence-construction/sssss1xz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-and-sequence-construction/sssss1xz"/>
      <lastmod>2026-11-02T12:03:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sliced-sphere-by-steve-phelps/sssss1x0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliced-sphere-by-steve-phelps/sssss1x0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliced-sphere-by-steve-phelps/sssss1x0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliced-sphere-by-steve-phelps/sssss1x0"/>
      <lastmod>2026-11-02T18:26:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sliced-sphere-by-steve-phelps/sssss1x0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliced-sphere-by-steve-phelps/sssss1x0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliced-sphere-by-steve-phelps/sssss1x0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliced-sphere-by-steve-phelps/sssss1x0"/>
      <lastmod>2026-11-02T18:26:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-circumcircle-and-vector-construction-example/sssss1xd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-circumcircle-and-vector-construction-example/sssss1xd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-circumcircle-and-vector-construction-example/sssss1xd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-circumcircle-and-vector-construction-example/sssss1xd"/>
      <lastmod>2026-11-02T10:59:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-circumcircle-and-vector-construction-example/sssss1xd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-circumcircle-and-vector-construction-example/sssss1xd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-circumcircle-and-vector-construction-example/sssss1xd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-circumcircle-and-vector-construction-example/sssss1xd"/>
      <lastmod>2026-11-02T10:59:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/smallest-k-for-m-k-to-be-a-perfect-cube/sssss1xf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smallest-k-for-m-k-to-be-a-perfect-cube/sssss1xf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smallest-k-for-m-k-to-be-a-perfect-cube/sssss1xf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smallest-k-for-m-k-to-be-a-perfect-cube/sssss1xf"/>
      <lastmod>2026-11-02T09:29:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/smallest-k-for-m-k-to-be-a-perfect-cube/sssss1xf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smallest-k-for-m-k-to-be-a-perfect-cube/sssss1xf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smallest-k-for-m-k-to-be-a-perfect-cube/sssss1xf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smallest-k-for-m-k-to-be-a-perfect-cube/sssss1xf"/>
      <lastmod>2026-11-02T09:29:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-way-tables-sssssvau/sssss1x8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-way-tables-sssssvau/sssss1x8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-way-tables-sssssvau/sssss1x8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-way-tables-sssssvau/sssss1x8"/>
      <lastmod>2026-11-02T00:39:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-way-tables-sssssvau/sssss1x8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-way-tables-sssssvau/sssss1x8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-way-tables-sssssvau/sssss1x8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-way-tables-sssssvau/sssss1x8"/>
      <lastmod>2026-11-02T00:39:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-construction/sssss1xu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-construction/sssss1xu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-construction/sssss1xu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-construction/sssss1xu"/>
      <lastmod>2026-11-01T20:47:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-construction/sssss1xu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-construction/sssss1xu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-construction/sssss1xu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-construction/sssss1xu"/>
      <lastmod>2026-11-01T20:47:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-roots-from-factor-form-polynomials/sssss1x5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-roots-from-factor-form-polynomials/sssss1x5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-roots-from-factor-form-polynomials/sssss1x5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-roots-from-factor-form-polynomials/sssss1x5"/>
      <lastmod>2026-11-02T18:57:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-roots-from-factor-form-polynomials/sssss1x5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-roots-from-factor-form-polynomials/sssss1x5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-roots-from-factor-form-polynomials/sssss1x5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-roots-from-factor-form-polynomials/sssss1x5"/>
      <lastmod>2026-11-02T18:57:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-locus-practice-13/sssss1xb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-locus-practice-13/sssss1xb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-locus-practice-13/sssss1xb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-locus-practice-13/sssss1xb"/>
      <lastmod>2026-11-02T18:06:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-locus-practice-13/sssss1xb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-locus-practice-13/sssss1xb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-locus-practice-13/sssss1xb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-locus-practice-13/sssss1xb"/>
      <lastmod>2026-11-02T18:06:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-conic-section-possibilities/sssss1x3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-conic-section-possibilities/sssss1x3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-conic-section-possibilities/sssss1x3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-conic-section-possibilities/sssss1x3"/>
      <lastmod>2026-11-01T20:45:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-conic-section-possibilities/sssss1x3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-conic-section-possibilities/sssss1x3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-conic-section-possibilities/sssss1x3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-conic-section-possibilities/sssss1x3"/>
      <lastmod>2026-11-01T20:45:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/incircle-of-a-kite/sssss1xq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-of-a-kite/sssss1xq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-of-a-kite/sssss1xq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-of-a-kite/sssss1xq"/>
      <lastmod>2026-11-02T18:06:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/incircle-of-a-kite/sssss1xq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-of-a-kite/sssss1xq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-of-a-kite/sssss1xq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-of-a-kite/sssss1xq"/>
      <lastmod>2026-11-02T18:06:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-multiplication-by-10/sssss1x1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-by-10/sssss1x1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-by-10/sssss1x1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-by-10/sssss1x1"/>
      <lastmod>2026-11-01T23:32:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-multiplication-by-10/sssss1x1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-by-10/sssss1x1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-by-10/sssss1x1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-by-10/sssss1x1"/>
      <lastmod>2026-11-01T23:32:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identifying-parallel-lines/sssss1xm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-parallel-lines/sssss1xm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-parallel-lines/sssss1xm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-parallel-lines/sssss1xm"/>
      <lastmod>2026-11-01T23:38:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identifying-parallel-lines/sssss1xm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-parallel-lines/sssss1xm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-parallel-lines/sssss1xm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-parallel-lines/sssss1xm"/>
      <lastmod>2026-11-01T23:38:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dadras-attractor/sssss1xj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dadras-attractor/sssss1xj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dadras-attractor/sssss1xj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dadras-attractor/sssss1xj"/>
      <lastmod>2026-11-02T00:16:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dadras-attractor/sssss1xj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dadras-attractor/sssss1xj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dadras-attractor/sssss1xj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dadras-attractor/sssss1xj"/>
      <lastmod>2026-11-02T00:16:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/asa-congruence-demonstration-by-maryanne-gocmen/sssss1xp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-congruence-demonstration-by-maryanne-gocmen/sssss1xp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-congruence-demonstration-by-maryanne-gocmen/sssss1xp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-congruence-demonstration-by-maryanne-gocmen/sssss1xp"/>
      <lastmod>2026-11-02T18:39:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/asa-congruence-demonstration-by-maryanne-gocmen/sssss1xp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-congruence-demonstration-by-maryanne-gocmen/sssss1xp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-congruence-demonstration-by-maryanne-gocmen/sssss1xp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-congruence-demonstration-by-maryanne-gocmen/sssss1xp"/>
      <lastmod>2026-11-02T18:39:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformation-7/sssss1xw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-7/sssss1xw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-7/sssss1xw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-7/sssss1xw"/>
      <lastmod>2026-11-01T23:13:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformation-7/sssss1xw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-7/sssss1xw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-7/sssss1xw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-7/sssss1xw"/>
      <lastmod>2026-11-01T23:13:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/natural-logarithm-function-demo/sssss1x6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/natural-logarithm-function-demo/sssss1x6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/natural-logarithm-function-demo/sssss1x6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/natural-logarithm-function-demo/sssss1x6"/>
      <lastmod>2026-11-02T17:59:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/natural-logarithm-function-demo/sssss1x6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/natural-logarithm-function-demo/sssss1x6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/natural-logarithm-function-demo/sssss1x6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/natural-logarithm-function-demo/sssss1x6"/>
      <lastmod>2026-11-02T17:59:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-multiplication-cartesian/sssss1xg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-multiplication-cartesian/sssss1xg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-multiplication-cartesian/sssss1xg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-multiplication-cartesian/sssss1xg"/>
      <lastmod>2026-11-01T21:19:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-multiplication-cartesian/sssss1xg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-multiplication-cartesian/sssss1xg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-multiplication-cartesian/sssss1xg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-multiplication-cartesian/sssss1xg"/>
      <lastmod>2026-11-01T21:19:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-maker/sssss1x9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-maker/sssss1x9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-maker/sssss1x9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-maker/sssss1x9"/>
      <lastmod>2026-11-02T18:22:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-maker/sssss1x9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-maker/sssss1x9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-maker/sssss1x9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-maker/sssss1x9"/>
      <lastmod>2026-11-02T18:22:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-construct-a-perpendicular-bisector/sssss1xe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-construct-a-perpendicular-bisector/sssss1xe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-construct-a-perpendicular-bisector/sssss1xe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-construct-a-perpendicular-bisector/sssss1xe"/>
      <lastmod>2026-11-01T21:16:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-construct-a-perpendicular-bisector/sssss1xe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-construct-a-perpendicular-bisector/sssss1xe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-construct-a-perpendicular-bisector/sssss1xe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-construct-a-perpendicular-bisector/sssss1xe"/>
      <lastmod>2026-11-01T21:16:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/max-area-with-fixed-perimeter/sssss1xv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-area-with-fixed-perimeter/sssss1xv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-area-with-fixed-perimeter/sssss1xv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-area-with-fixed-perimeter/sssss1xv"/>
      <lastmod>2026-11-02T09:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/max-area-with-fixed-perimeter/sssss1xv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-area-with-fixed-perimeter/sssss1xv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-area-with-fixed-perimeter/sssss1xv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-area-with-fixed-perimeter/sssss1xv"/>
      <lastmod>2026-11-02T09:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-sections-of-a-regular-tetrahedron/sssss1x4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-regular-tetrahedron/sssss1x4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-regular-tetrahedron/sssss1x4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-regular-tetrahedron/sssss1x4"/>
      <lastmod>2026-11-02T18:21:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-sections-of-a-regular-tetrahedron/sssss1x4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-regular-tetrahedron/sssss1x4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-regular-tetrahedron/sssss1x4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-regular-tetrahedron/sssss1x4"/>
      <lastmod>2026-11-02T18:21:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pentagonal-prism-by-helen-bates/sssss1xl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagonal-prism-by-helen-bates/sssss1xl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagonal-prism-by-helen-bates/sssss1xl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagonal-prism-by-helen-bates/sssss1xl"/>
      <lastmod>2026-11-02T16:37:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pentagonal-prism-by-helen-bates/sssss1xl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagonal-prism-by-helen-bates/sssss1xl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagonal-prism-by-helen-bates/sssss1xl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagonal-prism-by-helen-bates/sssss1xl"/>
      <lastmod>2026-11-02T16:37:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/halvorsen-attractor/sssss1xy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/halvorsen-attractor/sssss1xy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/halvorsen-attractor/sssss1xy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/halvorsen-attractor/sssss1xy"/>
      <lastmod>2026-11-02T10:42:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/halvorsen-attractor/sssss1xy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/halvorsen-attractor/sssss1xy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/halvorsen-attractor/sssss1xy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/halvorsen-attractor/sssss1xy"/>
      <lastmod>2026-11-02T10:42:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-a-triangle-with-given-area-quick-formative-assessment/sssss1xa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-triangle-with-given-area-quick-formative-assessment/sssss1xa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-triangle-with-given-area-quick-formative-assessment/sssss1xa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-triangle-with-given-area-quick-formative-assessment/sssss1xa"/>
      <lastmod>2026-11-01T23:18:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-a-triangle-with-given-area-quick-formative-assessment/sssss1xa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-triangle-with-given-area-quick-formative-assessment/sssss1xa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-triangle-with-given-area-quick-formative-assessment/sssss1xa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-triangle-with-given-area-quick-formative-assessment/sssss1xa"/>
      <lastmod>2026-11-01T23:18:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-trajectory-of-complex-polynomial-roots-with-derivative-analysis/sssss1xc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-trajectory-of-complex-polynomial-roots-with-derivative-analysis/sssss1xc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-trajectory-of-complex-polynomial-roots-with-derivative-analysis/sssss1xc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-trajectory-of-complex-polynomial-roots-with-derivative-analysis/sssss1xc"/>
      <lastmod>2026-11-02T00:36:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-trajectory-of-complex-polynomial-roots-with-derivative-analysis/sssss1xc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-trajectory-of-complex-polynomial-roots-with-derivative-analysis/sssss1xc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-trajectory-of-complex-polynomial-roots-with-derivative-analysis/sssss1xc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-trajectory-of-complex-polynomial-roots-with-derivative-analysis/sssss1xc"/>
      <lastmod>2026-11-02T00:36:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-translation-example/sssss1xr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-translation-example/sssss1xr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-translation-example/sssss1xr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-translation-example/sssss1xr"/>
      <lastmod>2026-11-02T16:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-translation-example/sssss1xr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-translation-example/sssss1xr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-translation-example/sssss1xr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-translation-example/sssss1xr"/>
      <lastmod>2026-11-02T16:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-modeling-the-big-picture/sssss1xh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-modeling-the-big-picture/sssss1xh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-modeling-the-big-picture/sssss1xh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-modeling-the-big-picture/sssss1xh"/>
      <lastmod>2026-11-01T23:20:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-modeling-the-big-picture/sssss1xh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-modeling-the-big-picture/sssss1xh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-modeling-the-big-picture/sssss1xh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-modeling-the-big-picture/sssss1xh"/>
      <lastmod>2026-11-01T23:20:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-construction-demo-by-canozcebe/sssss1xt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-demo-by-canozcebe/sssss1xt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-demo-by-canozcebe/sssss1xt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-demo-by-canozcebe/sssss1xt"/>
      <lastmod>2026-11-02T13:00:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-construction-demo-by-canozcebe/sssss1xt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-demo-by-canozcebe/sssss1xt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-demo-by-canozcebe/sssss1xt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-demo-by-canozcebe/sssss1xt"/>
      <lastmod>2026-11-02T13:00:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/undefined-terms-rykira/sssss1xx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/undefined-terms-rykira/sssss1xx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/undefined-terms-rykira/sssss1xx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/undefined-terms-rykira/sssss1xx"/>
      <lastmod>2026-11-02T13:41:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/undefined-terms-rykira/sssss1xx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/undefined-terms-rykira/sssss1xx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/undefined-terms-rykira/sssss1xx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/undefined-terms-rykira/sssss1xx"/>
      <lastmod>2026-11-02T13:41:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-polygonal-sinusoids/sssss1xi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-polygonal-sinusoids/sssss1xi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-polygonal-sinusoids/sssss1xi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-polygonal-sinusoids/sssss1xi"/>
      <lastmod>2026-11-01T22:00:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-polygonal-sinusoids/sssss1xi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-polygonal-sinusoids/sssss1xi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-polygonal-sinusoids/sssss1xi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-polygonal-sinusoids/sssss1xi"/>
      <lastmod>2026-11-01T22:00:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-3-dynamic-plane-cutting-a-cone/sssss1xo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-3-dynamic-plane-cutting-a-cone/sssss1xo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-3-dynamic-plane-cutting-a-cone/sssss1xo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-3-dynamic-plane-cutting-a-cone/sssss1xo"/>
      <lastmod>2026-11-02T18:55:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-3-dynamic-plane-cutting-a-cone/sssss1xo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-3-dynamic-plane-cutting-a-cone/sssss1xo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-3-dynamic-plane-cutting-a-cone/sssss1xo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-3-dynamic-plane-cutting-a-cone/sssss1xo"/>
      <lastmod>2026-11-02T18:55:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-example-by-john/sssss1is</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-john/sssss1is"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-example-by-john/sssss1is"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-john/sssss1is"/>
      <lastmod>2026-11-02T17:46:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-example-by-john/sssss1is</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-john/sssss1is"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-example-by-john/sssss1is"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-john/sssss1is"/>
      <lastmod>2026-11-02T17:46:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-practice-i/sssss1i7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-practice-i/sssss1i7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-practice-i/sssss1i7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-practice-i/sssss1i7"/>
      <lastmod>2026-11-02T12:50:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-practice-i/sssss1i7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-practice-i/sssss1i7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-practice-i/sssss1i7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-practice-i/sssss1i7"/>
      <lastmod>2026-11-02T12:50:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/division-demonstration/sssss1in</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-demonstration/sssss1in"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-demonstration/sssss1in"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-demonstration/sssss1in"/>
      <lastmod>2026-11-01T23:54:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/division-demonstration/sssss1in</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-demonstration/sssss1in"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-demonstration/sssss1in"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-demonstration/sssss1in"/>
      <lastmod>2026-11-01T23:54:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-derivative/sssss1i2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivative/sssss1i2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivative/sssss1i2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivative/sssss1i2"/>
      <lastmod>2026-11-01T21:14:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-derivative/sssss1i2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivative/sssss1i2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivative/sssss1i2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivative/sssss1i2"/>
      <lastmod>2026-11-01T21:14:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/concentric-circles-layers-demo/sssss1ik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concentric-circles-layers-demo/sssss1ik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concentric-circles-layers-demo/sssss1ik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concentric-circles-layers-demo/sssss1ik"/>
      <lastmod>2026-11-01T21:15:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/concentric-circles-layers-demo/sssss1ik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concentric-circles-layers-demo/sssss1ik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concentric-circles-layers-demo/sssss1ik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concentric-circles-layers-demo/sssss1ik"/>
      <lastmod>2026-11-01T21:15:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometric-problem-demonstration/sssss1iz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-problem-demonstration/sssss1iz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-problem-demonstration/sssss1iz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-problem-demonstration/sssss1iz"/>
      <lastmod>2026-11-02T16:41:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometric-problem-demonstration/sssss1iz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-problem-demonstration/sssss1iz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-problem-demonstration/sssss1iz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-problem-demonstration/sssss1iz"/>
      <lastmod>2026-11-02T16:41:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-hyperbola-construction/sssss1i0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-hyperbola-construction/sssss1i0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-hyperbola-construction/sssss1i0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-hyperbola-construction/sssss1i0"/>
      <lastmod>2026-11-02T18:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-hyperbola-construction/sssss1i0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-hyperbola-construction/sssss1i0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-hyperbola-construction/sssss1i0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-hyperbola-construction/sssss1i0"/>
      <lastmod>2026-11-02T18:16:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-a-cube/sssss1id</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-a-cube/sssss1id"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-a-cube/sssss1id"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-a-cube/sssss1id"/>
      <lastmod>2026-11-01T22:00:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-a-cube/sssss1id</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-a-cube/sssss1id"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-a-cube/sssss1id"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-a-cube/sssss1id"/>
      <lastmod>2026-11-01T22:00:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-sequence-graph-and-general-term/sssss1if</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-graph-and-general-term/sssss1if"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-graph-and-general-term/sssss1if"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-graph-and-general-term/sssss1if"/>
      <lastmod>2026-11-01T19:12:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-sequence-graph-and-general-term/sssss1if</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-graph-and-general-term/sssss1if"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-graph-and-general-term/sssss1if"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-graph-and-general-term/sssss1if"/>
      <lastmod>2026-11-01T19:12:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-of-a-triangle-containing-circle-center/sssss1i8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-of-a-triangle-containing-circle-center/sssss1i8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-of-a-triangle-containing-circle-center/sssss1i8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-of-a-triangle-containing-circle-center/sssss1i8"/>
      <lastmod>2026-11-02T18:34:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-of-a-triangle-containing-circle-center/sssss1i8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-of-a-triangle-containing-circle-center/sssss1i8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-of-a-triangle-containing-circle-center/sssss1i8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-of-a-triangle-containing-circle-center/sssss1i8"/>
      <lastmod>2026-11-02T18:34:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-and-shrinking-demo/sssss1iu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-shrinking-demo/sssss1iu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-shrinking-demo/sssss1iu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-shrinking-demo/sssss1iu"/>
      <lastmod>2026-11-01T19:34:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-and-shrinking-demo/sssss1iu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-shrinking-demo/sssss1iu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-shrinking-demo/sssss1iu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-shrinking-demo/sssss1iu"/>
      <lastmod>2026-11-01T19:34:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-cylinder-side/sssss1i5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-cylinder-side/sssss1i5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-cylinder-side/sssss1i5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-cylinder-side/sssss1i5"/>
      <lastmod>2026-11-02T16:38:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-cylinder-side/sssss1i5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-cylinder-side/sssss1i5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-cylinder-side/sssss1i5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-cylinder-side/sssss1i5"/>
      <lastmod>2026-11-02T16:38:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-trig-length-generator/sssss1ib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-trig-length-generator/sssss1ib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-trig-length-generator/sssss1ib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-trig-length-generator/sssss1ib"/>
      <lastmod>2026-11-02T17:51:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-trig-length-generator/sssss1ib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-trig-length-generator/sssss1ib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-trig-length-generator/sssss1ib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-trig-length-generator/sssss1ib"/>
      <lastmod>2026-11-02T17:51:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-example-by-alexander-blanksby/sssss1i3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-example-by-alexander-blanksby/sssss1i3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-example-by-alexander-blanksby/sssss1i3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-example-by-alexander-blanksby/sssss1i3"/>
      <lastmod>2026-11-02T17:59:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-example-by-alexander-blanksby/sssss1i3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-example-by-alexander-blanksby/sssss1i3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-example-by-alexander-blanksby/sssss1i3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-example-by-alexander-blanksby/sssss1i3"/>
      <lastmod>2026-11-02T17:59:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/height-of-a-triangle/sssss1iq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/height-of-a-triangle/sssss1iq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/height-of-a-triangle/sssss1iq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/height-of-a-triangle/sssss1iq"/>
      <lastmod>2026-11-02T13:38:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/height-of-a-triangle/sssss1iq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/height-of-a-triangle/sssss1iq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/height-of-a-triangle/sssss1iq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/height-of-a-triangle/sssss1iq"/>
      <lastmod>2026-11-02T13:38:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometry-building-blocks-set/sssss1i1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-building-blocks-set/sssss1i1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometry-building-blocks-set/sssss1i1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometry-building-blocks-set/sssss1i1"/>
      <lastmod>2026-11-02T17:38:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometry-building-blocks-set/sssss1i1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-building-blocks-set/sssss1i1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometry-building-blocks-set/sssss1i1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometry-building-blocks-set/sssss1i1"/>
      <lastmod>2026-11-02T17:38:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-cube-3d-construction-and-rotation/sssss1im</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-cube-3d-construction-and-rotation/sssss1im"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-cube-3d-construction-and-rotation/sssss1im"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-cube-3d-construction-and-rotation/sssss1im"/>
      <lastmod>2026-11-02T18:42:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-cube-3d-construction-and-rotation/sssss1im</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-cube-3d-construction-and-rotation/sssss1im"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-cube-3d-construction-and-rotation/sssss1im"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-cube-3d-construction-and-rotation/sssss1im"/>
      <lastmod>2026-11-02T18:42:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cutting-a-cone-by-ibrahim-el-hage/sssss1ij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cutting-a-cone-by-ibrahim-el-hage/sssss1ij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cutting-a-cone-by-ibrahim-el-hage/sssss1ij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cutting-a-cone-by-ibrahim-el-hage/sssss1ij"/>
      <lastmod>2026-11-02T06:16:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cutting-a-cone-by-ibrahim-el-hage/sssss1ij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cutting-a-cone-by-ibrahim-el-hage/sssss1ij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cutting-a-cone-by-ibrahim-el-hage/sssss1ij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cutting-a-cone-by-ibrahim-el-hage/sssss1ij"/>
      <lastmod>2026-11-02T06:16:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-of-3d-parametric-curve-about-line/sssss1ip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-of-3d-parametric-curve-about-line/sssss1ip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-of-3d-parametric-curve-about-line/sssss1ip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-of-3d-parametric-curve-about-line/sssss1ip"/>
      <lastmod>2026-11-02T17:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-of-3d-parametric-curve-about-line/sssss1ip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-of-3d-parametric-curve-about-line/sssss1ip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-of-3d-parametric-curve-about-line/sssss1ip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-of-3d-parametric-curve-about-line/sssss1ip"/>
      <lastmod>2026-11-02T17:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-on-number-line/sssss1iw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-on-number-line/sssss1iw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-on-number-line/sssss1iw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-on-number-line/sssss1iw"/>
      <lastmod>2026-11-01T23:53:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-on-number-line/sssss1iw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-on-number-line/sssss1iw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-on-number-line/sssss1iw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-on-number-line/sssss1iw"/>
      <lastmod>2026-11-01T23:53:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-template-step-by-step-investigation/sssss1i6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-template-step-by-step-investigation/sssss1i6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-template-step-by-step-investigation/sssss1i6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-template-step-by-step-investigation/sssss1i6"/>
      <lastmod>2026-11-01T21:39:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-template-step-by-step-investigation/sssss1i6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-template-step-by-step-investigation/sssss1i6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-template-step-by-step-investigation/sssss1i6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-template-step-by-step-investigation/sssss1i6"/>
      <lastmod>2026-11-01T21:39:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-with-dynamic-parameters/sssss1ig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-with-dynamic-parameters/sssss1ig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-with-dynamic-parameters/sssss1ig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-with-dynamic-parameters/sssss1ig"/>
      <lastmod>2026-11-01T21:55:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-with-dynamic-parameters/sssss1ig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-with-dynamic-parameters/sssss1ig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-with-dynamic-parameters/sssss1ig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-with-dynamic-parameters/sssss1ig"/>
      <lastmod>2026-11-01T21:55:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-inscribed-in-a-cube/sssss1i9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-inscribed-in-a-cube/sssss1i9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-inscribed-in-a-cube/sssss1i9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-inscribed-in-a-cube/sssss1i9"/>
      <lastmod>2026-11-02T18:59:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-inscribed-in-a-cube/sssss1i9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-inscribed-in-a-cube/sssss1i9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-inscribed-in-a-cube/sssss1i9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-inscribed-in-a-cube/sssss1i9"/>
      <lastmod>2026-11-02T18:59:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/60-rhombus-art/sssss1ie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/60-rhombus-art/sssss1ie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/60-rhombus-art/sssss1ie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/60-rhombus-art/sssss1ie"/>
      <lastmod>2026-11-02T13:15:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/60-rhombus-art/sssss1ie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/60-rhombus-art/sssss1ie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/60-rhombus-art/sssss1ie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/60-rhombus-art/sssss1ie"/>
      <lastmod>2026-11-02T13:15:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-fractions-visualization-random-generation-and-bilingual-comparison/sssss1iv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-visualization-random-generation-and-bilingual-comparison/sssss1iv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-visualization-random-generation-and-bilingual-comparison/sssss1iv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-visualization-random-generation-and-bilingual-comparison/sssss1iv"/>
      <lastmod>2026-11-02T12:30:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-fractions-visualization-random-generation-and-bilingual-comparison/sssss1iv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-visualization-random-generation-and-bilingual-comparison/sssss1iv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-visualization-random-generation-and-bilingual-comparison/sssss1iv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-visualization-random-generation-and-bilingual-comparison/sssss1iv"/>
      <lastmod>2026-11-02T12:30:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/feuerbach-hyperbola/sssss1i4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/feuerbach-hyperbola/sssss1i4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/feuerbach-hyperbola/sssss1i4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/feuerbach-hyperbola/sssss1i4"/>
      <lastmod>2026-11-02T00:32:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/feuerbach-hyperbola/sssss1i4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/feuerbach-hyperbola/sssss1i4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/feuerbach-hyperbola/sssss1i4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/feuerbach-hyperbola/sssss1i4"/>
      <lastmod>2026-11-02T00:32:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-comparison-game/sssss1il</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-comparison-game/sssss1il"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-comparison-game/sssss1il"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-comparison-game/sssss1il"/>
      <lastmod>2026-11-02T09:50:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-comparison-game/sssss1il</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-comparison-game/sssss1il"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-comparison-game/sssss1il"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-comparison-game/sssss1il"/>
      <lastmod>2026-11-02T09:50:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/homothety-and-reflection-about-a-point/sssss1iy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/homothety-and-reflection-about-a-point/sssss1iy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/homothety-and-reflection-about-a-point/sssss1iy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/homothety-and-reflection-about-a-point/sssss1iy"/>
      <lastmod>2026-11-02T18:32:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/homothety-and-reflection-about-a-point/sssss1iy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/homothety-and-reflection-about-a-point/sssss1iy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/homothety-and-reflection-about-a-point/sssss1iy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/homothety-and-reflection-about-a-point/sssss1iy"/>
      <lastmod>2026-11-02T18:32:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fourier-series-by-sergio-sanz/sssss1ia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fourier-series-by-sergio-sanz/sssss1ia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fourier-series-by-sergio-sanz/sssss1ia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fourier-series-by-sergio-sanz/sssss1ia"/>
      <lastmod>2026-11-01T23:17:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fourier-series-by-sergio-sanz/sssss1ia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fourier-series-by-sergio-sanz/sssss1ia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fourier-series-by-sergio-sanz/sssss1ia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fourier-series-by-sergio-sanz/sssss1ia"/>
      <lastmod>2026-11-01T23:17:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-properties-of-quadrilaterals/sssss1ic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-properties-of-quadrilaterals/sssss1ic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-properties-of-quadrilaterals/sssss1ic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-properties-of-quadrilaterals/sssss1ic"/>
      <lastmod>2026-11-02T16:50:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-properties-of-quadrilaterals/sssss1ic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-properties-of-quadrilaterals/sssss1ic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-properties-of-quadrilaterals/sssss1ic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-properties-of-quadrilaterals/sssss1ic"/>
      <lastmod>2026-11-02T16:50:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-number-line/sssss1ir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-number-line/sssss1ir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-number-line/sssss1ir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-number-line/sssss1ir"/>
      <lastmod>2026-11-02T17:44:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-number-line/sssss1ir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-number-line/sssss1ir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-number-line/sssss1ir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-number-line/sssss1ir"/>
      <lastmod>2026-11-02T17:44:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-subtraction/sssss1ih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction/sssss1ih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction/sssss1ih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction/sssss1ih"/>
      <lastmod>2026-11-02T09:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-subtraction/sssss1ih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction/sssss1ih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction/sssss1ih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction/sssss1ih"/>
      <lastmod>2026-11-02T09:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-triangular-prism-by-helen-bates/sssss1it</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-triangular-prism-by-helen-bates/sssss1it"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-triangular-prism-by-helen-bates/sssss1it"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-triangular-prism-by-helen-bates/sssss1it"/>
      <lastmod>2026-11-02T16:47:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-triangular-prism-by-helen-bates/sssss1it</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-triangular-prism-by-helen-bates/sssss1it"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-triangular-prism-by-helen-bates/sssss1it"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-triangular-prism-by-helen-bates/sssss1it"/>
      <lastmod>2026-11-02T16:47:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ai-hl-multiplication-of-complex-numbers/sssss1ix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ai-hl-multiplication-of-complex-numbers/sssss1ix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ai-hl-multiplication-of-complex-numbers/sssss1ix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ai-hl-multiplication-of-complex-numbers/sssss1ix"/>
      <lastmod>2026-11-01T21:24:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ai-hl-multiplication-of-complex-numbers/sssss1ix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ai-hl-multiplication-of-complex-numbers/sssss1ix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ai-hl-multiplication-of-complex-numbers/sssss1ix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ai-hl-multiplication-of-complex-numbers/sssss1ix"/>
      <lastmod>2026-11-01T21:24:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-and-cosine/sssss1ii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine/sssss1ii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine/sssss1ii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine/sssss1ii"/>
      <lastmod>2026-11-02T14:57:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-and-cosine/sssss1ii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine/sssss1ii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine/sssss1ii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine/sssss1ii"/>
      <lastmod>2026-11-02T14:57:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mean-median-mode-interactive-demonstration/sssss1io</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-median-mode-interactive-demonstration/sssss1io"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-median-mode-interactive-demonstration/sssss1io"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-median-mode-interactive-demonstration/sssss1io"/>
      <lastmod>2026-11-01T21:22:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mean-median-mode-interactive-demonstration/sssss1io</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-median-mode-interactive-demonstration/sssss1io"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-median-mode-interactive-demonstration/sssss1io"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-median-mode-interactive-demonstration/sssss1io"/>
      <lastmod>2026-11-01T21:22:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-transformations-of-shapes/sssss1os</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-transformations-of-shapes/sssss1os"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-transformations-of-shapes/sssss1os"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-transformations-of-shapes/sssss1os"/>
      <lastmod>2026-11-01T21:12:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-transformations-of-shapes/sssss1os</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-transformations-of-shapes/sssss1os"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-transformations-of-shapes/sssss1os"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-transformations-of-shapes/sssss1os"/>
      <lastmod>2026-11-01T21:12:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dome-in-sectors/sssss1o7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dome-in-sectors/sssss1o7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dome-in-sectors/sssss1o7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dome-in-sectors/sssss1o7"/>
      <lastmod>2026-11-01T21:06:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dome-in-sectors/sssss1o7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dome-in-sectors/sssss1o7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dome-in-sectors/sssss1o7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dome-in-sectors/sssss1o7"/>
      <lastmod>2026-11-01T21:06:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-transformation-discovery/sssss1on</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-transformation-discovery/sssss1on"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-transformation-discovery/sssss1on"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-transformation-discovery/sssss1on"/>
      <lastmod>2026-11-01T23:14:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-transformation-discovery/sssss1on</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-transformation-discovery/sssss1on"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-transformation-discovery/sssss1on"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-transformation-discovery/sssss1on"/>
      <lastmod>2026-11-01T23:14:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-curve-demo/sssss1o2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-curve-demo/sssss1o2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-curve-demo/sssss1o2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-curve-demo/sssss1o2"/>
      <lastmod>2026-11-01T23:49:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-curve-demo/sssss1o2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-curve-demo/sssss1o2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-curve-demo/sssss1o2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-curve-demo/sssss1o2"/>
      <lastmod>2026-11-01T23:49:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratios-in-right-angled-triangles/sssss1ok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-in-right-angled-triangles/sssss1ok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-in-right-angled-triangles/sssss1ok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-in-right-angled-triangles/sssss1ok"/>
      <lastmod>2026-11-02T17:05:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratios-in-right-angled-triangles/sssss1ok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-in-right-angled-triangles/sssss1ok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-in-right-angled-triangles/sssss1ok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-in-right-angled-triangles/sssss1ok"/>
      <lastmod>2026-11-02T17:05:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chaos-game-by-steve-phelps/sssss1oz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chaos-game-by-steve-phelps/sssss1oz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chaos-game-by-steve-phelps/sssss1oz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chaos-game-by-steve-phelps/sssss1oz"/>
      <lastmod>2026-11-02T16:29:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chaos-game-by-steve-phelps/sssss1oz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chaos-game-by-steve-phelps/sssss1oz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chaos-game-by-steve-phelps/sssss1oz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chaos-game-by-steve-phelps/sssss1oz"/>
      <lastmod>2026-11-02T16:29:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-decoration/sssss1o0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-decoration/sssss1o0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-decoration/sssss1o0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-decoration/sssss1o0"/>
      <lastmod>2026-11-01T21:03:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-decoration/sssss1o0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-decoration/sssss1o0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-decoration/sssss1o0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-decoration/sssss1o0"/>
      <lastmod>2026-11-01T21:03:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/learning-ellipse-interactive-tool/sssss1od</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/learning-ellipse-interactive-tool/sssss1od"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/learning-ellipse-interactive-tool/sssss1od"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/learning-ellipse-interactive-tool/sssss1od"/>
      <lastmod>2026-11-01T20:42:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/learning-ellipse-interactive-tool/sssss1od</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/learning-ellipse-interactive-tool/sssss1od"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/learning-ellipse-interactive-tool/sssss1od"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/learning-ellipse-interactive-tool/sssss1od"/>
      <lastmod>2026-11-01T20:42:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-by-ben-sparks/sssss1of</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-by-ben-sparks/sssss1of"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-proof-without-words-by-ben-sparks/sssss1of"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-by-ben-sparks/sssss1of"/>
      <lastmod>2026-11-01T23:08:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-proof-without-words-by-ben-sparks/sssss1of</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-by-ben-sparks/sssss1of"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-proof-without-words-by-ben-sparks/sssss1of"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-by-ben-sparks/sssss1of"/>
      <lastmod>2026-11-01T23:08:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sampling-distribution-of-the-mean/sssss1o8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sampling-distribution-of-the-mean/sssss1o8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sampling-distribution-of-the-mean/sssss1o8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sampling-distribution-of-the-mean/sssss1o8"/>
      <lastmod>2026-11-01T19:15:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sampling-distribution-of-the-mean/sssss1o8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sampling-distribution-of-the-mean/sssss1o8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sampling-distribution-of-the-mean/sssss1o8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sampling-distribution-of-the-mean/sssss1o8"/>
      <lastmod>2026-11-01T19:15:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/great-circles/sssss1ou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/great-circles/sssss1ou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/great-circles/sssss1ou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/great-circles/sssss1ou"/>
      <lastmod>2026-11-01T23:53:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/great-circles/sssss1ou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/great-circles/sssss1ou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/great-circles/sssss1ou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/great-circles/sssss1ou"/>
      <lastmod>2026-11-01T23:53:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoidal-prism-surface-area/sssss1o5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoidal-prism-surface-area/sssss1o5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoidal-prism-surface-area/sssss1o5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoidal-prism-surface-area/sssss1o5"/>
      <lastmod>2026-11-01T21:33:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoidal-prism-surface-area/sssss1o5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoidal-prism-surface-area/sssss1o5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoidal-prism-surface-area/sssss1o5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoidal-prism-surface-area/sssss1o5"/>
      <lastmod>2026-11-01T21:33:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratio-of-perimeter-area-volume/sssss1ob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-of-perimeter-area-volume/sssss1ob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-of-perimeter-area-volume/sssss1ob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-of-perimeter-area-volume/sssss1ob"/>
      <lastmod>2026-11-02T18:40:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratio-of-perimeter-area-volume/sssss1ob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-of-perimeter-area-volume/sssss1ob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-of-perimeter-area-volume/sssss1ob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-of-perimeter-area-volume/sssss1ob"/>
      <lastmod>2026-11-02T18:40:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-limit-demonstration/sssss1o3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-limit-demonstration/sssss1o3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-limit-demonstration/sssss1o3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-limit-demonstration/sssss1o3"/>
      <lastmod>2026-11-02T00:27:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-limit-demonstration/sssss1o3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-limit-demonstration/sssss1o3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-limit-demonstration/sssss1o3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-limit-demonstration/sssss1o3"/>
      <lastmod>2026-11-02T00:27:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/skewed-cone-reflectional-symmetry/sssss1oq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/skewed-cone-reflectional-symmetry/sssss1oq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/skewed-cone-reflectional-symmetry/sssss1oq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/skewed-cone-reflectional-symmetry/sssss1oq"/>
      <lastmod>2026-11-02T02:59:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/skewed-cone-reflectional-symmetry/sssss1oq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/skewed-cone-reflectional-symmetry/sssss1oq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/skewed-cone-reflectional-symmetry/sssss1oq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/skewed-cone-reflectional-symmetry/sssss1oq"/>
      <lastmod>2026-11-02T02:59:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-angles/sssss1o1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-angles/sssss1o1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-angles/sssss1o1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-angles/sssss1o1"/>
      <lastmod>2026-11-02T08:53:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-angles/sssss1o1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-angles/sssss1o1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-angles/sssss1o1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-angles/sssss1o1"/>
      <lastmod>2026-11-02T08:53:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/span-of-2-vectors/sssss1om</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/span-of-2-vectors/sssss1om"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/span-of-2-vectors/sssss1om"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/span-of-2-vectors/sssss1om"/>
      <lastmod>2026-11-02T17:45:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/span-of-2-vectors/sssss1om</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/span-of-2-vectors/sssss1om"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/span-of-2-vectors/sssss1om"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/span-of-2-vectors/sssss1om"/>
      <lastmod>2026-11-02T17:45:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-unwrapping-dynamic-demo/sssss1oj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-unwrapping-dynamic-demo/sssss1oj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-unwrapping-dynamic-demo/sssss1oj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-unwrapping-dynamic-demo/sssss1oj"/>
      <lastmod>2026-11-02T18:36:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-unwrapping-dynamic-demo/sssss1oj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-unwrapping-dynamic-demo/sssss1oj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-unwrapping-dynamic-demo/sssss1oj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-unwrapping-dynamic-demo/sssss1oj"/>
      <lastmod>2026-11-02T18:36:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-and-function-construction-example-power-function-and-rectangle-diagra/sssss1op</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-and-function-construction-example-power-function-and-rectangle-diagra/sssss1op"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-and-function-construction-example-power-function-and-rectangle-diagra/sssss1op"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-and-function-construction-example-power-function-and-rectangle-diagra/sssss1op"/>
      <lastmod>2026-11-02T02:49:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-and-function-construction-example-power-function-and-rectangle-diagra/sssss1op</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-and-function-construction-example-power-function-and-rectangle-diagra/sssss1op"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-and-function-construction-example-power-function-and-rectangle-diagra/sssss1op"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-and-function-construction-example-power-function-and-rectangle-diagra/sssss1op"/>
      <lastmod>2026-11-02T02:49:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-and-subtraction-of-polynomials/sssss1ow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-and-subtraction-of-polynomials/sssss1ow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-and-subtraction-of-polynomials/sssss1ow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-and-subtraction-of-polynomials/sssss1ow"/>
      <lastmod>2026-11-01T20:40:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-and-subtraction-of-polynomials/sssss1ow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-and-subtraction-of-polynomials/sssss1ow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-and-subtraction-of-polynomials/sssss1ow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-and-subtraction-of-polynomials/sssss1ow"/>
      <lastmod>2026-11-01T20:40:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-and-geometric-construction/sssss1o6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-and-geometric-construction/sssss1o6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-and-geometric-construction/sssss1o6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-and-geometric-construction/sssss1o6"/>
      <lastmod>2026-11-02T17:57:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-and-geometric-construction/sssss1o6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-and-geometric-construction/sssss1o6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-and-geometric-construction/sssss1o6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-and-geometric-construction/sssss1o6"/>
      <lastmod>2026-11-02T17:57:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-the-orthocenter-by-andrewmatteson/sssss1og</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-the-orthocenter-by-andrewmatteson/sssss1og"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-the-orthocenter-by-andrewmatteson/sssss1og"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-the-orthocenter-by-andrewmatteson/sssss1og"/>
      <lastmod>2026-11-02T16:56:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-the-orthocenter-by-andrewmatteson/sssss1og</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-the-orthocenter-by-andrewmatteson/sssss1og"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-the-orthocenter-by-andrewmatteson/sssss1og"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-the-orthocenter-by-andrewmatteson/sssss1og"/>
      <lastmod>2026-11-02T16:56:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/first-order-homogeneous-differential-equation/sssss1o9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-order-homogeneous-differential-equation/sssss1o9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-order-homogeneous-differential-equation/sssss1o9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-order-homogeneous-differential-equation/sssss1o9"/>
      <lastmod>2026-11-01T21:31:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/first-order-homogeneous-differential-equation/sssss1o9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-order-homogeneous-differential-equation/sssss1o9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-order-homogeneous-differential-equation/sssss1o9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-order-homogeneous-differential-equation/sssss1o9"/>
      <lastmod>2026-11-01T21:31:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-rates-of-change-and-tangent-lines/sssss1oe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-rates-of-change-and-tangent-lines/sssss1oe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-rates-of-change-and-tangent-lines/sssss1oe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-rates-of-change-and-tangent-lines/sssss1oe"/>
      <lastmod>2026-11-01T20:55:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-rates-of-change-and-tangent-lines/sssss1oe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-rates-of-change-and-tangent-lines/sssss1oe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-rates-of-change-and-tangent-lines/sssss1oe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-rates-of-change-and-tangent-lines/sssss1oe"/>
      <lastmod>2026-11-01T20:55:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimating-population-measures-of-center/sssss1ov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-population-measures-of-center/sssss1ov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-population-measures-of-center/sssss1ov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-population-measures-of-center/sssss1ov"/>
      <lastmod>2026-11-02T10:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimating-population-measures-of-center/sssss1ov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-population-measures-of-center/sssss1ov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-population-measures-of-center/sssss1ov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-population-measures-of-center/sssss1ov"/>
      <lastmod>2026-11-02T10:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-of-hyperbola-and-light-reflection/sssss1o4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-of-hyperbola-and-light-reflection/sssss1o4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-of-hyperbola-and-light-reflection/sssss1o4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-of-hyperbola-and-light-reflection/sssss1o4"/>
      <lastmod>2026-11-02T18:49:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-of-hyperbola-and-light-reflection/sssss1o4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-of-hyperbola-and-light-reflection/sssss1o4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-of-hyperbola-and-light-reflection/sssss1o4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-of-hyperbola-and-light-reflection/sssss1o4"/>
      <lastmod>2026-11-02T18:49:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/car-speed-story-graph/sssss1ol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/car-speed-story-graph/sssss1ol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/car-speed-story-graph/sssss1ol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/car-speed-story-graph/sssss1ol"/>
      <lastmod>2026-11-02T18:26:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/car-speed-story-graph/sssss1ol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/car-speed-story-graph/sssss1ol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/car-speed-story-graph/sssss1ol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/car-speed-story-graph/sssss1ol"/>
      <lastmod>2026-11-02T18:26:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-geometric-construction/sssss1oy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-geometric-construction/sssss1oy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-geometric-construction/sssss1oy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-geometric-construction/sssss1oy"/>
      <lastmod>2026-11-01T21:23:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-geometric-construction/sssss1oy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-geometric-construction/sssss1oy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-geometric-construction/sssss1oy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-geometric-construction/sssss1oy"/>
      <lastmod>2026-11-01T21:23:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-rotational-activity-face-and-vase-combination/sssss1oa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-rotational-activity-face-and-vase-combination/sssss1oa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-rotational-activity-face-and-vase-combination/sssss1oa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-rotational-activity-face-and-vase-combination/sssss1oa"/>
      <lastmod>2026-11-02T18:26:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-rotational-activity-face-and-vase-combination/sssss1oa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-rotational-activity-face-and-vase-combination/sssss1oa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-rotational-activity-face-and-vase-combination/sssss1oa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-rotational-activity-face-and-vase-combination/sssss1oa"/>
      <lastmod>2026-11-02T18:26:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tetrahedron-construction/sssss1oc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tetrahedron-construction/sssss1oc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tetrahedron-construction/sssss1oc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tetrahedron-construction/sssss1oc"/>
      <lastmod>2026-11-01T21:56:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tetrahedron-construction/sssss1oc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tetrahedron-construction/sssss1oc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tetrahedron-construction/sssss1oc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tetrahedron-construction/sssss1oc"/>
      <lastmod>2026-11-01T21:56:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modeling-two-digit-addition-with-dots/sssss1or</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-two-digit-addition-with-dots/sssss1or"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-two-digit-addition-with-dots/sssss1or"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-two-digit-addition-with-dots/sssss1or"/>
      <lastmod>2026-11-01T21:38:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modeling-two-digit-addition-with-dots/sssss1or</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-two-digit-addition-with-dots/sssss1or"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-two-digit-addition-with-dots/sssss1or"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-two-digit-addition-with-dots/sssss1or"/>
      <lastmod>2026-11-01T21:38:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demo-of-orthocenter-and-incircle/sssss1oh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demo-of-orthocenter-and-incircle/sssss1oh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demo-of-orthocenter-and-incircle/sssss1oh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demo-of-orthocenter-and-incircle/sssss1oh"/>
      <lastmod>2026-11-02T18:02:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demo-of-orthocenter-and-incircle/sssss1oh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demo-of-orthocenter-and-incircle/sssss1oh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demo-of-orthocenter-and-incircle/sssss1oh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demo-of-orthocenter-and-incircle/sssss1oh"/>
      <lastmod>2026-11-02T18:02:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/penrose-triangle/sssss1ot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/penrose-triangle/sssss1ot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/penrose-triangle/sssss1ot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/penrose-triangle/sssss1ot"/>
      <lastmod>2026-11-02T18:39:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/penrose-triangle/sssss1ot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/penrose-triangle/sssss1ot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/penrose-triangle/sssss1ot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/penrose-triangle/sssss1ot"/>
      <lastmod>2026-11-02T18:39:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-function-graph-transformations-with-differential-equations/sssss1ox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-function-graph-transformations-with-differential-equations/sssss1ox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-function-graph-transformations-with-differential-equations/sssss1ox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-function-graph-transformations-with-differential-equations/sssss1ox"/>
      <lastmod>2026-11-02T00:38:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-function-graph-transformations-with-differential-equations/sssss1ox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-function-graph-transformations-with-differential-equations/sssss1ox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-function-graph-transformations-with-differential-equations/sssss1ox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-function-graph-transformations-with-differential-equations/sssss1ox"/>
      <lastmod>2026-11-02T00:38:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-without-words-pentagon-and-pythagorean-theorem/sssss1oi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-pentagon-and-pythagorean-theorem/sssss1oi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-pentagon-and-pythagorean-theorem/sssss1oi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-pentagon-and-pythagorean-theorem/sssss1oi"/>
      <lastmod>2026-11-01T22:00:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-without-words-pentagon-and-pythagorean-theorem/sssss1oi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-pentagon-and-pythagorean-theorem/sssss1oi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-pentagon-and-pythagorean-theorem/sssss1oi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-pentagon-and-pythagorean-theorem/sssss1oi"/>
      <lastmod>2026-11-01T22:00:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-triangle-s-special-segments-and-circumcircle/sssss1oo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-triangle-s-special-segments-and-circumcircle/sssss1oo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-triangle-s-special-segments-and-circumcircle/sssss1oo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-triangle-s-special-segments-and-circumcircle/sssss1oo"/>
      <lastmod>2026-11-02T16:54:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-triangle-s-special-segments-and-circumcircle/sssss1oo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-triangle-s-special-segments-and-circumcircle/sssss1oo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-triangle-s-special-segments-and-circumcircle/sssss1oo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-triangle-s-special-segments-and-circumcircle/sssss1oo"/>
      <lastmod>2026-11-02T16:54:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/snowy-days-histogram/sssssmss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snowy-days-histogram/sssssmss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snowy-days-histogram/sssssmss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snowy-days-histogram/sssssmss"/>
      <lastmod>2026-11-01T21:23:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/snowy-days-histogram/sssssmss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snowy-days-histogram/sssssmss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snowy-days-histogram/sssssmss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snowy-days-histogram/sssssmss"/>
      <lastmod>2026-11-01T21:23:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/does-ssa-prove-congruent-triangles/sssssms7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/does-ssa-prove-congruent-triangles/sssssms7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/does-ssa-prove-congruent-triangles/sssssms7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/does-ssa-prove-congruent-triangles/sssssms7"/>
      <lastmod>2026-11-02T17:38:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/does-ssa-prove-congruent-triangles/sssssms7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/does-ssa-prove-congruent-triangles/sssssms7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/does-ssa-prove-congruent-triangles/sssssms7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/does-ssa-prove-congruent-triangles/sssssms7"/>
      <lastmod>2026-11-02T17:38:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proportions-in-similar-triangles/sssssmsn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proportions-in-similar-triangles/sssssmsn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proportions-in-similar-triangles/sssssmsn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proportions-in-similar-triangles/sssssmsn"/>
      <lastmod>2026-11-01T23:21:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proportions-in-similar-triangles/sssssmsn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proportions-in-similar-triangles/sssssmsn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proportions-in-similar-triangles/sssssmsn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proportions-in-similar-triangles/sssssmsn"/>
      <lastmod>2026-11-01T23:21:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mathematical-construction-of-samsung-logo/sssssms2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mathematical-construction-of-samsung-logo/sssssms2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mathematical-construction-of-samsung-logo/sssssms2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mathematical-construction-of-samsung-logo/sssssms2"/>
      <lastmod>2026-11-01T21:28:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mathematical-construction-of-samsung-logo/sssssms2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mathematical-construction-of-samsung-logo/sssssms2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mathematical-construction-of-samsung-logo/sssssms2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mathematical-construction-of-samsung-logo/sssssms2"/>
      <lastmod>2026-11-01T21:28:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-simplification-practice-level-2/sssssmsk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-simplification-practice-level-2/sssssmsk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-simplification-practice-level-2/sssssmsk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-simplification-practice-level-2/sssssmsk"/>
      <lastmod>2026-11-02T18:40:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-simplification-practice-level-2/sssssmsk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-simplification-practice-level-2/sssssmsk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-simplification-practice-level-2/sssssmsk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-simplification-practice-level-2/sssssmsk"/>
      <lastmod>2026-11-02T18:40:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-parametric-curves-explorer/sssssmsz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-parametric-curves-explorer/sssssmsz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-parametric-curves-explorer/sssssmsz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-parametric-curves-explorer/sssssmsz"/>
      <lastmod>2026-11-02T17:50:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-parametric-curves-explorer/sssssmsz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-parametric-curves-explorer/sssssmsz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-parametric-curves-explorer/sssssmsz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-parametric-curves-explorer/sssssmsz"/>
      <lastmod>2026-11-02T17:50:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cars-race-linear-system/sssssms0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cars-race-linear-system/sssssms0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cars-race-linear-system/sssssms0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cars-race-linear-system/sssssms0"/>
      <lastmod>2026-11-02T02:27:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cars-race-linear-system/sssssms0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cars-race-linear-system/sssssms0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cars-race-linear-system/sssssms0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cars-race-linear-system/sssssms0"/>
      <lastmod>2026-11-02T02:27:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/level-curves/sssssmsd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/level-curves/sssssmsd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/level-curves/sssssmsd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/level-curves/sssssmsd"/>
      <lastmod>2026-11-02T17:49:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/level-curves/sssssmsd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/level-curves/sssssmsd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/level-curves/sssssmsd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/level-curves/sssssmsd"/>
      <lastmod>2026-11-02T17:49:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-division-demo-a-b/sssssmsf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-demo-a-b/sssssmsf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-demo-a-b/sssssmsf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-demo-a-b/sssssmsf"/>
      <lastmod>2026-11-02T08:44:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-division-demo-a-b/sssssmsf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-demo-a-b/sssssmsf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-demo-a-b/sssssmsf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-demo-a-b/sssssmsf"/>
      <lastmod>2026-11-02T08:44:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-and-division-of-complex-numbers-in-modulus-argument-form-1/sssssms8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-and-division-of-complex-numbers-in-modulus-argument-form-1/sssssms8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-and-division-of-complex-numbers-in-modulus-argument-form-1/sssssms8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-and-division-of-complex-numbers-in-modulus-argument-form-1/sssssms8"/>
      <lastmod>2026-11-02T16:40:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-and-division-of-complex-numbers-in-modulus-argument-form-1/sssssms8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-and-division-of-complex-numbers-in-modulus-argument-form-1/sssssms8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-and-division-of-complex-numbers-in-modulus-argument-form-1/sssssms8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-and-division-of-complex-numbers-in-modulus-argument-form-1/sssssms8"/>
      <lastmod>2026-11-02T16:40:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-derivatives/sssssmsu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-derivatives/sssssmsu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-derivatives/sssssmsu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-derivatives/sssssmsu"/>
      <lastmod>2026-11-01T21:44:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-derivatives/sssssmsu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-derivatives/sssssmsu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-derivatives/sssssmsu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-derivatives/sssssmsu"/>
      <lastmod>2026-11-01T21:44:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-function-type/sssssms5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-type/sssssms5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-type/sssssms5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-type/sssssms5"/>
      <lastmod>2026-11-02T18:30:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-function-type/sssssms5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-type/sssssms5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-type/sssssms5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-type/sssssms5"/>
      <lastmod>2026-11-02T18:30:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-geometric-patterns-by-chris-cambr-3/sssssmsb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-by-chris-cambr-3/sssssmsb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-patterns-by-chris-cambr-3/sssssmsb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-by-chris-cambr-3/sssssmsb"/>
      <lastmod>2026-11-02T06:05:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-geometric-patterns-by-chris-cambr-3/sssssmsb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-by-chris-cambr-3/sssssmsb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-patterns-by-chris-cambr-3/sssssmsb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-by-chris-cambr-3/sssssmsb"/>
      <lastmod>2026-11-02T06:05:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quantitative-analysis-of-square-ness-of-rectangles-with-function-graphs/sssssms3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quantitative-analysis-of-square-ness-of-rectangles-with-function-graphs/sssssms3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quantitative-analysis-of-square-ness-of-rectangles-with-function-graphs/sssssms3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quantitative-analysis-of-square-ness-of-rectangles-with-function-graphs/sssssms3"/>
      <lastmod>2026-11-02T00:18:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quantitative-analysis-of-square-ness-of-rectangles-with-function-graphs/sssssms3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quantitative-analysis-of-square-ness-of-rectangles-with-function-graphs/sssssms3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quantitative-analysis-of-square-ness-of-rectangles-with-function-graphs/sssssms3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quantitative-analysis-of-square-ness-of-rectangles-with-function-graphs/sssssms3"/>
      <lastmod>2026-11-02T00:18:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similarity-transformation-exploration-center-and-scale-factor/sssssmsq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-exploration-center-and-scale-factor/sssssmsq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-exploration-center-and-scale-factor/sssssmsq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-exploration-center-and-scale-factor/sssssmsq"/>
      <lastmod>2026-11-02T18:29:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similarity-transformation-exploration-center-and-scale-factor/sssssmsq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-exploration-center-and-scale-factor/sssssmsq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-exploration-center-and-scale-factor/sssssmsq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-exploration-center-and-scale-factor/sssssmsq"/>
      <lastmod>2026-11-02T18:29:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-exercise-11/sssssms1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-exercise-11/sssssms1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-exercise-11/sssssms1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-exercise-11/sssssms1"/>
      <lastmod>2026-11-02T18:58:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-exercise-11/sssssms1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-exercise-11/sssssms1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-exercise-11/sssssms1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-exercise-11/sssssms1"/>
      <lastmod>2026-11-02T18:58:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-and-cosine-graphs-by-erik-jacobsen/sssssmsm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-graphs-by-erik-jacobsen/sssssmsm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-graphs-by-erik-jacobsen/sssssmsm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-graphs-by-erik-jacobsen/sssssmsm"/>
      <lastmod>2026-11-02T17:49:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-and-cosine-graphs-by-erik-jacobsen/sssssmsm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-graphs-by-erik-jacobsen/sssssmsm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-graphs-by-erik-jacobsen/sssssmsm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-graphs-by-erik-jacobsen/sssssmsm"/>
      <lastmod>2026-11-02T17:49:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circles-ellipses-in-the-radius-eccentricity-plane/sssssmsj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circles-ellipses-in-the-radius-eccentricity-plane/sssssmsj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circles-ellipses-in-the-radius-eccentricity-plane/sssssmsj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circles-ellipses-in-the-radius-eccentricity-plane/sssssmsj"/>
      <lastmod>2026-11-02T18:56:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circles-ellipses-in-the-radius-eccentricity-plane/sssssmsj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circles-ellipses-in-the-radius-eccentricity-plane/sssssmsj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circles-ellipses-in-the-radius-eccentricity-plane/sssssmsj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circles-ellipses-in-the-radius-eccentricity-plane/sssssmsj"/>
      <lastmod>2026-11-02T18:56:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pacmath-series-inequalities-visualization-and-geometric-construction/sssssmsp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pacmath-series-inequalities-visualization-and-geometric-construction/sssssmsp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pacmath-series-inequalities-visualization-and-geometric-construction/sssssmsp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pacmath-series-inequalities-visualization-and-geometric-construction/sssssmsp"/>
      <lastmod>2026-11-01T19:07:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pacmath-series-inequalities-visualization-and-geometric-construction/sssssmsp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pacmath-series-inequalities-visualization-and-geometric-construction/sssssmsp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pacmath-series-inequalities-visualization-and-geometric-construction/sssssmsp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pacmath-series-inequalities-visualization-and-geometric-construction/sssssmsp"/>
      <lastmod>2026-11-01T19:07:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-parallel-lines/sssssmsw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-parallel-lines/sssssmsw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-parallel-lines/sssssmsw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-parallel-lines/sssssmsw"/>
      <lastmod>2026-11-01T21:21:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-parallel-lines/sssssmsw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-parallel-lines/sssssmsw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-parallel-lines/sssssmsw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-parallel-lines/sssssmsw"/>
      <lastmod>2026-11-01T21:21:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-integrals-of-vector-fields-work-circulation/sssssms6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-integrals-of-vector-fields-work-circulation/sssssms6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-integrals-of-vector-fields-work-circulation/sssssms6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-integrals-of-vector-fields-work-circulation/sssssms6"/>
      <lastmod>2026-11-02T13:56:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-integrals-of-vector-fields-work-circulation/sssssms6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-integrals-of-vector-fields-work-circulation/sssssms6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-integrals-of-vector-fields-work-circulation/sssssms6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-integrals-of-vector-fields-work-circulation/sssssms6"/>
      <lastmod>2026-11-02T13:56:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-three-circles-by-david-wees/sssssmsg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-three-circles-by-david-wees/sssssmsg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-three-circles-by-david-wees/sssssmsg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-three-circles-by-david-wees/sssssmsg"/>
      <lastmod>2026-11-02T02:52:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-three-circles-by-david-wees/sssssmsg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-three-circles-by-david-wees/sssssmsg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-three-circles-by-david-wees/sssssmsg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-three-circles-by-david-wees/sssssmsg"/>
      <lastmod>2026-11-02T02:52:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/stereographic-projection-of-coordinate-grid-to-sphere/sssssms9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stereographic-projection-of-coordinate-grid-to-sphere/sssssms9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stereographic-projection-of-coordinate-grid-to-sphere/sssssms9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stereographic-projection-of-coordinate-grid-to-sphere/sssssms9"/>
      <lastmod>2026-11-02T16:40:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/stereographic-projection-of-coordinate-grid-to-sphere/sssssms9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stereographic-projection-of-coordinate-grid-to-sphere/sssssms9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stereographic-projection-of-coordinate-grid-to-sphere/sssssms9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stereographic-projection-of-coordinate-grid-to-sphere/sssssms9"/>
      <lastmod>2026-11-02T16:40:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-tessellation/sssssmse</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-tessellation/sssssmse"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-tessellation/sssssmse"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-tessellation/sssssmse"/>
      <lastmod>2026-11-02T02:37:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-tessellation/sssssmse</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-tessellation/sssssmse"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-tessellation/sssssmse"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-tessellation/sssssmse"/>
      <lastmod>2026-11-02T02:37:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-to-one-function/sssssmsv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-to-one-function/sssssmsv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-to-one-function/sssssmsv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-to-one-function/sssssmsv"/>
      <lastmod>2026-11-01T20:52:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-to-one-function/sssssmsv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-to-one-function/sssssmsv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-to-one-function/sssssmsv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-to-one-function/sssssmsv"/>
      <lastmod>2026-11-01T20:52:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/m-bius-strip-with-rainbow-unit-normal-vectors/sssssms4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/m-bius-strip-with-rainbow-unit-normal-vectors/sssssms4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/m-bius-strip-with-rainbow-unit-normal-vectors/sssssms4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/m-bius-strip-with-rainbow-unit-normal-vectors/sssssms4"/>
      <lastmod>2026-11-01T21:15:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/m-bius-strip-with-rainbow-unit-normal-vectors/sssssms4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/m-bius-strip-with-rainbow-unit-normal-vectors/sssssms4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/m-bius-strip-with-rainbow-unit-normal-vectors/sssssms4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/m-bius-strip-with-rainbow-unit-normal-vectors/sssssms4"/>
      <lastmod>2026-11-01T21:15:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/figure-8-surface-by-juan-carlos-ponce-campuzano/sssssmsl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/figure-8-surface-by-juan-carlos-ponce-campuzano/sssssmsl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/figure-8-surface-by-juan-carlos-ponce-campuzano/sssssmsl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/figure-8-surface-by-juan-carlos-ponce-campuzano/sssssmsl"/>
      <lastmod>2026-11-02T09:26:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/figure-8-surface-by-juan-carlos-ponce-campuzano/sssssmsl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/figure-8-surface-by-juan-carlos-ponce-campuzano/sssssmsl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/figure-8-surface-by-juan-carlos-ponce-campuzano/sssssmsl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/figure-8-surface-by-juan-carlos-ponce-campuzano/sssssmsl"/>
      <lastmod>2026-11-02T09:26:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-in-origin-and-axes/sssssmsy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-origin-and-axes/sssssmsy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-origin-and-axes/sssssmsy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-origin-and-axes/sssssmsy"/>
      <lastmod>2026-11-02T18:30:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-in-origin-and-axes/sssssmsy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-origin-and-axes/sssssmsy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-origin-and-axes/sssssmsy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-origin-and-axes/sssssmsy"/>
      <lastmod>2026-11-02T18:30:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-inscribed-in-a-pentagon/sssssmsa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-inscribed-in-a-pentagon/sssssmsa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-inscribed-in-a-pentagon/sssssmsa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-inscribed-in-a-pentagon/sssssmsa"/>
      <lastmod>2026-11-01T21:17:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-inscribed-in-a-pentagon/sssssmsa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-inscribed-in-a-pentagon/sssssmsa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-inscribed-in-a-pentagon/sssssmsa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-inscribed-in-a-pentagon/sssssmsa"/>
      <lastmod>2026-11-01T21:17:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relativity-02-wave-velocity-probability-demo/sssssmsc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relativity-02-wave-velocity-probability-demo/sssssmsc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relativity-02-wave-velocity-probability-demo/sssssmsc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relativity-02-wave-velocity-probability-demo/sssssmsc"/>
      <lastmod>2026-11-01T23:40:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relativity-02-wave-velocity-probability-demo/sssssmsc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relativity-02-wave-velocity-probability-demo/sssssmsc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relativity-02-wave-velocity-probability-demo/sssssmsc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relativity-02-wave-velocity-probability-demo/sssssmsc"/>
      <lastmod>2026-11-01T23:40:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cool-area-of-triangle-problem-dynamic-construction-and-exploration/sssssmsr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cool-area-of-triangle-problem-dynamic-construction-and-exploration/sssssmsr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cool-area-of-triangle-problem-dynamic-construction-and-exploration/sssssmsr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cool-area-of-triangle-problem-dynamic-construction-and-exploration/sssssmsr"/>
      <lastmod>2026-11-02T18:59:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cool-area-of-triangle-problem-dynamic-construction-and-exploration/sssssmsr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cool-area-of-triangle-problem-dynamic-construction-and-exploration/sssssmsr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cool-area-of-triangle-problem-dynamic-construction-and-exploration/sssssmsr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cool-area-of-triangle-problem-dynamic-construction-and-exploration/sssssmsr"/>
      <lastmod>2026-11-02T18:59:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-fractions-with-an-area-model/sssssmsh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions-with-an-area-model/sssssmsh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions-with-an-area-model/sssssmsh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions-with-an-area-model/sssssmsh"/>
      <lastmod>2026-11-02T18:43:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-fractions-with-an-area-model/sssssmsh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions-with-an-area-model/sssssmsh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions-with-an-area-model/sssssmsh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions-with-an-area-model/sssssmsh"/>
      <lastmod>2026-11-02T18:43:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-probability-distribution-demo/sssssmst</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-probability-distribution-demo/sssssmst"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-probability-distribution-demo/sssssmst"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-probability-distribution-demo/sssssmst"/>
      <lastmod>2026-11-02T16:49:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-probability-distribution-demo/sssssmst</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-probability-distribution-demo/sssssmst"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-probability-distribution-demo/sssssmst"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-probability-distribution-demo/sssssmst"/>
      <lastmod>2026-11-02T16:49:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-demo/sssssmsx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-demo/sssssmsx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-demo/sssssmsx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-demo/sssssmsx"/>
      <lastmod>2026-11-02T14:56:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-demo/sssssmsx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-demo/sssssmsx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-demo/sssssmsx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-demo/sssssmsx"/>
      <lastmod>2026-11-02T14:56:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-distributivity-division/sssssmsi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-distributivity-division/sssssmsi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-distributivity-division/sssssmsi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-distributivity-division/sssssmsi"/>
      <lastmod>2026-11-01T23:42:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-distributivity-division/sssssmsi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-distributivity-division/sssssmsi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-distributivity-division/sssssmsi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-distributivity-division/sssssmsi"/>
      <lastmod>2026-11-01T23:42:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-arithmetic-practice/sssssmso</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-arithmetic-practice/sssssmso"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-arithmetic-practice/sssssmso"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-arithmetic-practice/sssssmso"/>
      <lastmod>2026-11-01T19:10:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-arithmetic-practice/sssssmso</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-arithmetic-practice/sssssmso"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-arithmetic-practice/sssssmso"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-arithmetic-practice/sssssmso"/>
      <lastmod>2026-11-01T19:10:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-of-hyperbolic-sectors/sssssm7s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-hyperbolic-sectors/sssssm7s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-hyperbolic-sectors/sssssm7s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-hyperbolic-sectors/sssssm7s"/>
      <lastmod>2026-11-02T12:48:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-of-hyperbolic-sectors/sssssm7s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-hyperbolic-sectors/sssssm7s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-hyperbolic-sectors/sssssm7s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-hyperbolic-sectors/sssssm7s"/>
      <lastmod>2026-11-02T12:48:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilating-a-triangle/sssssm77</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilating-a-triangle/sssssm77"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilating-a-triangle/sssssm77"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilating-a-triangle/sssssm77"/>
      <lastmod>2026-11-02T00:03:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilating-a-triangle/sssssm77</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilating-a-triangle/sssssm77"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilating-a-triangle/sssssm77"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilating-a-triangle/sssssm77"/>
      <lastmod>2026-11-02T00:03:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-existence-of-complex-numbers/sssssm7n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-existence-of-complex-numbers/sssssm7n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-existence-of-complex-numbers/sssssm7n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-existence-of-complex-numbers/sssssm7n"/>
      <lastmod>2026-11-02T18:02:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-existence-of-complex-numbers/sssssm7n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-existence-of-complex-numbers/sssssm7n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-existence-of-complex-numbers/sssssm7n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-existence-of-complex-numbers/sssssm7n"/>
      <lastmod>2026-11-02T18:02:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/math-faces-using-piecewise-functions/sssssm72</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-faces-using-piecewise-functions/sssssm72"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-faces-using-piecewise-functions/sssssm72"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-faces-using-piecewise-functions/sssssm72"/>
      <lastmod>2026-11-02T02:37:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/math-faces-using-piecewise-functions/sssssm72</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-faces-using-piecewise-functions/sssssm72"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-faces-using-piecewise-functions/sssssm72"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-faces-using-piecewise-functions/sssssm72"/>
      <lastmod>2026-11-02T02:37:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plot-reflection-for-any-horizontal-or-vertical-line/sssssm7k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plot-reflection-for-any-horizontal-or-vertical-line/sssssm7k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plot-reflection-for-any-horizontal-or-vertical-line/sssssm7k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plot-reflection-for-any-horizontal-or-vertical-line/sssssm7k"/>
      <lastmod>2026-11-02T18:39:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plot-reflection-for-any-horizontal-or-vertical-line/sssssm7k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plot-reflection-for-any-horizontal-or-vertical-line/sssssm7k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plot-reflection-for-any-horizontal-or-vertical-line/sssssm7k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plot-reflection-for-any-horizontal-or-vertical-line/sssssm7k"/>
      <lastmod>2026-11-02T18:39:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logo-a-style-geometric-construction/sssssm7z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-a-style-geometric-construction/sssssm7z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-a-style-geometric-construction/sssssm7z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-a-style-geometric-construction/sssssm7z"/>
      <lastmod>2026-11-01T19:36:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logo-a-style-geometric-construction/sssssm7z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-a-style-geometric-construction/sssssm7z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-a-style-geometric-construction/sssssm7z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-a-style-geometric-construction/sssssm7z"/>
      <lastmod>2026-11-01T19:36:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chord-through-ellipse-center-via-parallel-tangents/sssssm70</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chord-through-ellipse-center-via-parallel-tangents/sssssm70"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chord-through-ellipse-center-via-parallel-tangents/sssssm70"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chord-through-ellipse-center-via-parallel-tangents/sssssm70"/>
      <lastmod>2026-11-02T09:18:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chord-through-ellipse-center-via-parallel-tangents/sssssm70</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chord-through-ellipse-center-via-parallel-tangents/sssssm70"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chord-through-ellipse-center-via-parallel-tangents/sssssm70"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chord-through-ellipse-center-via-parallel-tangents/sssssm70"/>
      <lastmod>2026-11-02T09:18:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proportional-polygons/sssssm7d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proportional-polygons/sssssm7d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proportional-polygons/sssssm7d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proportional-polygons/sssssm7d"/>
      <lastmod>2026-11-02T16:53:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proportional-polygons/sssssm7d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proportional-polygons/sssssm7d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proportional-polygons/sssssm7d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proportional-polygons/sssssm7d"/>
      <lastmod>2026-11-02T16:53:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unwrapping-a-cylinder/sssssm7f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unwrapping-a-cylinder/sssssm7f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unwrapping-a-cylinder/sssssm7f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unwrapping-a-cylinder/sssssm7f"/>
      <lastmod>2026-11-02T18:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unwrapping-a-cylinder/sssssm7f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unwrapping-a-cylinder/sssssm7f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unwrapping-a-cylinder/sssssm7f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unwrapping-a-cylinder/sssssm7f"/>
      <lastmod>2026-11-02T18:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/consecutive-interior-angles-of-parallel-lines/sssssm78</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/consecutive-interior-angles-of-parallel-lines/sssssm78"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/consecutive-interior-angles-of-parallel-lines/sssssm78"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/consecutive-interior-angles-of-parallel-lines/sssssm78"/>
      <lastmod>2026-11-02T00:16:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/consecutive-interior-angles-of-parallel-lines/sssssm78</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/consecutive-interior-angles-of-parallel-lines/sssssm78"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/consecutive-interior-angles-of-parallel-lines/sssssm78"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/consecutive-interior-angles-of-parallel-lines/sssssm78"/>
      <lastmod>2026-11-02T00:16:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-from-cross-product-diagonal-vectors/sssssm7u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-from-cross-product-diagonal-vectors/sssssm7u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-from-cross-product-diagonal-vectors/sssssm7u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-from-cross-product-diagonal-vectors/sssssm7u"/>
      <lastmod>2026-11-01T19:26:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-from-cross-product-diagonal-vectors/sssssm7u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-from-cross-product-diagonal-vectors/sssssm7u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-from-cross-product-diagonal-vectors/sssssm7u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-from-cross-product-diagonal-vectors/sssssm7u"/>
      <lastmod>2026-11-01T19:26:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-of-sin-x/sssssm75</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-sin-x/sssssm75"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-sin-x/sssssm75"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-sin-x/sssssm75"/>
      <lastmod>2026-11-02T18:58:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-of-sin-x/sssssm75</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-sin-x/sssssm75"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-sin-x/sssssm75"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-sin-x/sssssm75"/>
      <lastmod>2026-11-02T18:58:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-quadrilateral-demo/sssssm7b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-quadrilateral-demo/sssssm7b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-quadrilateral-demo/sssssm7b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-quadrilateral-demo/sssssm7b"/>
      <lastmod>2026-11-02T10:45:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-quadrilateral-demo/sssssm7b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-quadrilateral-demo/sssssm7b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-quadrilateral-demo/sssssm7b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-quadrilateral-demo/sssssm7b"/>
      <lastmod>2026-11-02T10:45:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logo-spiuk-geometric-construction-example/sssssm73</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-spiuk-geometric-construction-example/sssssm73"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-spiuk-geometric-construction-example/sssssm73"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-spiuk-geometric-construction-example/sssssm73"/>
      <lastmod>2026-11-01T21:23:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logo-spiuk-geometric-construction-example/sssssm73</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-spiuk-geometric-construction-example/sssssm73"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-spiuk-geometric-construction-example/sssssm73"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-spiuk-geometric-construction-example/sssssm73"/>
      <lastmod>2026-11-01T21:23:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-special-angles-radian-measures-of-30-45-60/sssssm7q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-special-angles-radian-measures-of-30-45-60/sssssm7q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-special-angles-radian-measures-of-30-45-60/sssssm7q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-special-angles-radian-measures-of-30-45-60/sssssm7q"/>
      <lastmod>2026-11-02T17:50:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-special-angles-radian-measures-of-30-45-60/sssssm7q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-special-angles-radian-measures-of-30-45-60/sssssm7q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-special-angles-radian-measures-of-30-45-60/sssssm7q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-special-angles-radian-measures-of-30-45-60/sssssm7q"/>
      <lastmod>2026-11-02T17:50:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-cone/sssssm71</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cone/sssssm71"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cone/sssssm71"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cone/sssssm71"/>
      <lastmod>2026-11-01T19:17:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-cone/sssssm71</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cone/sssssm71"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cone/sssssm71"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cone/sssssm71"/>
      <lastmod>2026-11-01T19:17:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/poisson-distribution-calculator-by-kamil-cyrkle/sssssm7m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-distribution-calculator-by-kamil-cyrkle/sssssm7m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-distribution-calculator-by-kamil-cyrkle/sssssm7m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-distribution-calculator-by-kamil-cyrkle/sssssm7m"/>
      <lastmod>2026-11-02T18:28:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/poisson-distribution-calculator-by-kamil-cyrkle/sssssm7m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-distribution-calculator-by-kamil-cyrkle/sssssm7m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-distribution-calculator-by-kamil-cyrkle/sssssm7m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-distribution-calculator-by-kamil-cyrkle/sssssm7m"/>
      <lastmod>2026-11-02T18:28:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-nicola-trubridge/sssssm7j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-nicola-trubridge/sssssm7j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curved-surface-area-of-cones-by-nicola-trubridge/sssssm7j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-nicola-trubridge/sssssm7j"/>
      <lastmod>2026-11-02T16:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curved-surface-area-of-cones-by-nicola-trubridge/sssssm7j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-nicola-trubridge/sssssm7j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curved-surface-area-of-cones-by-nicola-trubridge/sssssm7j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-nicola-trubridge/sssssm7j"/>
      <lastmod>2026-11-02T16:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/playing-with-circles-and-segments-pcg/sssssm7p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/playing-with-circles-and-segments-pcg/sssssm7p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/playing-with-circles-and-segments-pcg/sssssm7p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/playing-with-circles-and-segments-pcg/sssssm7p"/>
      <lastmod>2026-11-01T19:15:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/playing-with-circles-and-segments-pcg/sssssm7p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/playing-with-circles-and-segments-pcg/sssssm7p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/playing-with-circles-and-segments-pcg/sssssm7p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/playing-with-circles-and-segments-pcg/sssssm7p"/>
      <lastmod>2026-11-01T19:15:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-circles-internally-tangent-to-a-larger-circle/sssssm7w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-circles-internally-tangent-to-a-larger-circle/sssssm7w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-two-circles-internally-tangent-to-a-larger-circle/sssssm7w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-circles-internally-tangent-to-a-larger-circle/sssssm7w"/>
      <lastmod>2026-11-02T15:10:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-two-circles-internally-tangent-to-a-larger-circle/sssssm7w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-circles-internally-tangent-to-a-larger-circle/sssssm7w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-two-circles-internally-tangent-to-a-larger-circle/sssssm7w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-circles-internally-tangent-to-a-larger-circle/sssssm7w"/>
      <lastmod>2026-11-02T15:10:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-effects-of-coefficients-on-parabola-general-form/sssssm76</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-effects-of-coefficients-on-parabola-general-form/sssssm76"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-effects-of-coefficients-on-parabola-general-form/sssssm76"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-effects-of-coefficients-on-parabola-general-form/sssssm76"/>
      <lastmod>2026-11-02T18:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-effects-of-coefficients-on-parabola-general-form/sssssm76</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-effects-of-coefficients-on-parabola-general-form/sssssm76"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-effects-of-coefficients-on-parabola-general-form/sssssm76"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-effects-of-coefficients-on-parabola-general-form/sssssm76"/>
      <lastmod>2026-11-02T18:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthogonal-frame-demonstration/sssssm7g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthogonal-frame-demonstration/sssssm7g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthogonal-frame-demonstration/sssssm7g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthogonal-frame-demonstration/sssssm7g"/>
      <lastmod>2026-11-02T08:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthogonal-frame-demonstration/sssssm7g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthogonal-frame-demonstration/sssssm7g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthogonal-frame-demonstration/sssssm7g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthogonal-frame-demonstration/sssssm7g"/>
      <lastmod>2026-11-02T08:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/real-and-imaginary-components-of-complex-numbers/sssssm79</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-and-imaginary-components-of-complex-numbers/sssssm79"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-and-imaginary-components-of-complex-numbers/sssssm79"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-and-imaginary-components-of-complex-numbers/sssssm79"/>
      <lastmod>2026-11-01T22:04:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/real-and-imaginary-components-of-complex-numbers/sssssm79</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-and-imaginary-components-of-complex-numbers/sssssm79"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-and-imaginary-components-of-complex-numbers/sssssm79"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-and-imaginary-components-of-complex-numbers/sssssm79"/>
      <lastmod>2026-11-01T22:04:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-mwatler/sssssm7e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-mwatler/sssssm7e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-mwatler/sssssm7e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-mwatler/sssssm7e"/>
      <lastmod>2026-11-01T20:47:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-mwatler/sssssm7e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-mwatler/sssssm7e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-mwatler/sssssm7e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-mwatler/sssssm7e"/>
      <lastmod>2026-11-01T20:47:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-square-root-learning/sssssm7v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-square-root-learning/sssssm7v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-square-root-learning/sssssm7v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-square-root-learning/sssssm7v"/>
      <lastmod>2026-11-02T13:35:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-square-root-learning/sssssm7v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-square-root-learning/sssssm7v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-square-root-learning/sssssm7v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-square-root-learning/sssssm7v"/>
      <lastmod>2026-11-02T13:35:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-parameters-of-quadratic-polynomials/sssssm74</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-parameters-of-quadratic-polynomials/sssssm74"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-parameters-of-quadratic-polynomials/sssssm74"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-parameters-of-quadratic-polynomials/sssssm74"/>
      <lastmod>2026-11-02T02:24:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-parameters-of-quadratic-polynomials/sssssm74</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-parameters-of-quadratic-polynomials/sssssm74"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-parameters-of-quadratic-polynomials/sssssm74"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-parameters-of-quadratic-polynomials/sssssm74"/>
      <lastmod>2026-11-02T02:24:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planes-normals-and-intersections/sssssm7l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-normals-and-intersections/sssssm7l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-normals-and-intersections/sssssm7l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-normals-and-intersections/sssssm7l"/>
      <lastmod>2026-11-02T18:11:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planes-normals-and-intersections/sssssm7l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-normals-and-intersections/sssssm7l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-normals-and-intersections/sssssm7l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-normals-and-intersections/sssssm7l"/>
      <lastmod>2026-11-02T18:11:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/icosian-game/sssssm7y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosian-game/sssssm7y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosian-game/sssssm7y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosian-game/sssssm7y"/>
      <lastmod>2026-11-01T21:23:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/icosian-game/sssssm7y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosian-game/sssssm7y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosian-game/sssssm7y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosian-game/sssssm7y"/>
      <lastmod>2026-11-01T21:23:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-exploration-of-a-right-triangle/sssssm7a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-exploration-of-a-right-triangle/sssssm7a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-exploration-of-a-right-triangle/sssssm7a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-exploration-of-a-right-triangle/sssssm7a"/>
      <lastmod>2026-11-01T23:56:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-exploration-of-a-right-triangle/sssssm7a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-exploration-of-a-right-triangle/sssssm7a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-exploration-of-a-right-triangle/sssssm7a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-exploration-of-a-right-triangle/sssssm7a"/>
      <lastmod>2026-11-01T23:56:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-using-an-algorithm-to-divide-fractions/sssssm7c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-using-an-algorithm-to-divide-fractions/sssssm7c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-using-an-algorithm-to-divide-fractions/sssssm7c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-using-an-algorithm-to-divide-fractions/sssssm7c"/>
      <lastmod>2026-11-01T20:29:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-using-an-algorithm-to-divide-fractions/sssssm7c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-using-an-algorithm-to-divide-fractions/sssssm7c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-using-an-algorithm-to-divide-fractions/sssssm7c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-using-an-algorithm-to-divide-fractions/sssssm7c"/>
      <lastmod>2026-11-01T20:29:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-center-of-mass-calculator/sssssm7r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-center-of-mass-calculator/sssssm7r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-center-of-mass-calculator/sssssm7r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-center-of-mass-calculator/sssssm7r"/>
      <lastmod>2026-11-01T21:35:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-center-of-mass-calculator/sssssm7r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-center-of-mass-calculator/sssssm7r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-center-of-mass-calculator/sssssm7r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-center-of-mass-calculator/sssssm7r"/>
      <lastmod>2026-11-01T21:35:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-plane-and-line-by-elena-solis/sssssm7h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-plane-and-line-by-elena-solis/sssssm7h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-plane-and-line-by-elena-solis/sssssm7h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-plane-and-line-by-elena-solis/sssssm7h"/>
      <lastmod>2026-11-02T00:02:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-plane-and-line-by-elena-solis/sssssm7h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-plane-and-line-by-elena-solis/sssssm7h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-plane-and-line-by-elena-solis/sssssm7h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-plane-and-line-by-elena-solis/sssssm7h"/>
      <lastmod>2026-11-02T00:02:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sequence-series-divergence/sssssm7t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-series-divergence/sssssm7t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-series-divergence/sssssm7t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-series-divergence/sssssm7t"/>
      <lastmod>2026-11-01T19:01:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sequence-series-divergence/sssssm7t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-series-divergence/sssssm7t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-series-divergence/sssssm7t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-series-divergence/sssssm7t"/>
      <lastmod>2026-11-01T19:01:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/richard-s-g-period-orthocenter/sssssm7x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/richard-s-g-period-orthocenter/sssssm7x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/richard-s-g-period-orthocenter/sssssm7x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/richard-s-g-period-orthocenter/sssssm7x"/>
      <lastmod>2026-11-02T17:50:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/richard-s-g-period-orthocenter/sssssm7x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/richard-s-g-period-orthocenter/sssssm7x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/richard-s-g-period-orthocenter/sssssm7x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/richard-s-g-period-orthocenter/sssssm7x"/>
      <lastmod>2026-11-02T17:50:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-the-tripadvisor-owl-logo/sssssm7i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-tripadvisor-owl-logo/sssssm7i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-tripadvisor-owl-logo/sssssm7i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-tripadvisor-owl-logo/sssssm7i"/>
      <lastmod>2026-11-01T21:55:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-the-tripadvisor-owl-logo/sssssm7i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-tripadvisor-owl-logo/sssssm7i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-tripadvisor-owl-logo/sssssm7i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-tripadvisor-owl-logo/sssssm7i"/>
      <lastmod>2026-11-01T21:55:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/poisson-distribution-by-hannu-m-ki/sssssm7o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-distribution-by-hannu-m-ki/sssssm7o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-distribution-by-hannu-m-ki/sssssm7o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-distribution-by-hannu-m-ki/sssssm7o"/>
      <lastmod>2026-11-02T18:23:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/poisson-distribution-by-hannu-m-ki/sssssm7o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-distribution-by-hannu-m-ki/sssssm7o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-distribution-by-hannu-m-ki/sssssm7o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-distribution-by-hannu-m-ki/sssssm7o"/>
      <lastmod>2026-11-02T18:23:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/what-are-percentages/sssssmns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-are-percentages/sssssmns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-are-percentages/sssssmns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-are-percentages/sssssmns"/>
      <lastmod>2026-11-02T09:26:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/what-are-percentages/sssssmns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-are-percentages/sssssmns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-are-percentages/sssssmns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-are-percentages/sssssmns"/>
      <lastmod>2026-11-02T09:26:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-subtraction-practice/sssssmn7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-practice/sssssmn7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-practice/sssssmn7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-practice/sssssmn7"/>
      <lastmod>2026-11-02T00:49:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-subtraction-practice/sssssmn7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-practice/sssssmn7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-practice/sssssmn7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-practice/sssssmn7"/>
      <lastmod>2026-11-02T00:49:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-through-2-points/sssssmnn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-through-2-points/sssssmnn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-through-2-points/sssssmnn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-through-2-points/sssssmnn"/>
      <lastmod>2026-11-02T18:45:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-through-2-points/sssssmnn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-through-2-points/sssssmnn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-through-2-points/sssssmnn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-through-2-points/sssssmnn"/>
      <lastmod>2026-11-02T18:45:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/magic-three-times-table-grid/sssssmn2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magic-three-times-table-grid/sssssmn2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magic-three-times-table-grid/sssssmn2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magic-three-times-table-grid/sssssmn2"/>
      <lastmod>2026-11-01T19:02:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/magic-three-times-table-grid/sssssmn2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magic-three-times-table-grid/sssssmn2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magic-three-times-table-grid/sssssmn2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magic-three-times-table-grid/sssssmn2"/>
      <lastmod>2026-11-01T19:02:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/system-of-three-linear-equations-linear-intersection/sssssmnk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-three-linear-equations-linear-intersection/sssssmnk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-three-linear-equations-linear-intersection/sssssmnk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-three-linear-equations-linear-intersection/sssssmnk"/>
      <lastmod>2026-11-02T08:33:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/system-of-three-linear-equations-linear-intersection/sssssmnk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-three-linear-equations-linear-intersection/sssssmnk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-three-linear-equations-linear-intersection/sssssmnk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-three-linear-equations-linear-intersection/sssssmnk"/>
      <lastmod>2026-11-02T08:33:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-transformation-experiment/sssssmnz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-transformation-experiment/sssssmnz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-transformation-experiment/sssssmnz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-transformation-experiment/sssssmnz"/>
      <lastmod>2026-11-01T23:52:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-transformation-experiment/sssssmnz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-transformation-experiment/sssssmnz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-transformation-experiment/sssssmnz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-transformation-experiment/sssssmnz"/>
      <lastmod>2026-11-01T23:52:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-3-rate-of-change/sssssmn0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-3-rate-of-change/sssssmn0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-3-rate-of-change/sssssmn0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-3-rate-of-change/sssssmn0"/>
      <lastmod>2026-11-02T17:50:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-3-rate-of-change/sssssmn0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-3-rate-of-change/sssssmn0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-3-rate-of-change/sssssmn0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-3-rate-of-change/sssssmn0"/>
      <lastmod>2026-11-02T17:50:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circular-motion-on-complex-plane/sssssmnd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-motion-on-complex-plane/sssssmnd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-motion-on-complex-plane/sssssmnd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-motion-on-complex-plane/sssssmnd"/>
      <lastmod>2026-11-02T08:52:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circular-motion-on-complex-plane/sssssmnd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-motion-on-complex-plane/sssssmnd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-motion-on-complex-plane/sssssmnd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-motion-on-complex-plane/sssssmnd"/>
      <lastmod>2026-11-02T08:52:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponents-game-level-5/sssssmnf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-game-level-5/sssssmnf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-game-level-5/sssssmnf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-game-level-5/sssssmnf"/>
      <lastmod>2026-11-01T21:36:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponents-game-level-5/sssssmnf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-game-level-5/sssssmnf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-game-level-5/sssssmnf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-game-level-5/sssssmnf"/>
      <lastmod>2026-11-01T21:36:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-calculation-polygon-demo/sssssmn8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-calculation-polygon-demo/sssssmn8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-calculation-polygon-demo/sssssmn8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-calculation-polygon-demo/sssssmn8"/>
      <lastmod>2026-11-02T00:12:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-calculation-polygon-demo/sssssmn8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-calculation-polygon-demo/sssssmn8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-calculation-polygon-demo/sssssmn8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-calculation-polygon-demo/sssssmn8"/>
      <lastmod>2026-11-02T00:12:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-to-sine-and-cosine-functions/sssssmnu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-to-sine-and-cosine-functions/sssssmnu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-to-sine-and-cosine-functions/sssssmnu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-to-sine-and-cosine-functions/sssssmnu"/>
      <lastmod>2026-11-01T19:20:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-to-sine-and-cosine-functions/sssssmnu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-to-sine-and-cosine-functions/sssssmnu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-to-sine-and-cosine-functions/sssssmnu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-to-sine-and-cosine-functions/sssssmnu"/>
      <lastmod>2026-11-01T19:20:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-parts-of-a-cube/sssssmn5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-parts-of-a-cube/sssssmn5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-parts-of-a-cube/sssssmn5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-parts-of-a-cube/sssssmn5"/>
      <lastmod>2026-11-01T22:00:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-parts-of-a-cube/sssssmn5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-parts-of-a-cube/sssssmn5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-parts-of-a-cube/sssssmn5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-parts-of-a-cube/sssssmn5"/>
      <lastmod>2026-11-01T22:00:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-alkhawarizmi-solved-quadratic-equation/sssssmnb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-alkhawarizmi-solved-quadratic-equation/sssssmnb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-alkhawarizmi-solved-quadratic-equation/sssssmnb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-alkhawarizmi-solved-quadratic-equation/sssssmnb"/>
      <lastmod>2026-11-02T17:50:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-alkhawarizmi-solved-quadratic-equation/sssssmnb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-alkhawarizmi-solved-quadratic-equation/sssssmnb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-alkhawarizmi-solved-quadratic-equation/sssssmnb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-alkhawarizmi-solved-quadratic-equation/sssssmnb"/>
      <lastmod>2026-11-02T17:50:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-dilations-by-elizabeth-barwick/sssssmn3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-dilations-by-elizabeth-barwick/sssssmn3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-dilations-by-elizabeth-barwick/sssssmn3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-dilations-by-elizabeth-barwick/sssssmn3"/>
      <lastmod>2026-11-02T18:40:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-dilations-by-elizabeth-barwick/sssssmn3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-dilations-by-elizabeth-barwick/sssssmn3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-dilations-by-elizabeth-barwick/sssssmn3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-dilations-by-elizabeth-barwick/sssssmn3"/>
      <lastmod>2026-11-02T18:40:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equation-with-point-and-slope/sssssmnq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-with-point-and-slope/sssssmnq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-with-point-and-slope/sssssmnq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-with-point-and-slope/sssssmnq"/>
      <lastmod>2026-11-02T17:55:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equation-with-point-and-slope/sssssmnq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-with-point-and-slope/sssssmnq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-with-point-and-slope/sssssmnq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-with-point-and-slope/sssssmnq"/>
      <lastmod>2026-11-02T17:55:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-created-from-revolution-by/sssssmn1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-created-from-revolution-by/sssssmn1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-created-from-revolution-by/sssssmn1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-created-from-revolution-by/sssssmn1"/>
      <lastmod>2026-11-02T18:29:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-created-from-revolution-by/sssssmn1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-created-from-revolution-by/sssssmn1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-created-from-revolution-by/sssssmn1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-created-from-revolution-by/sssssmn1"/>
      <lastmod>2026-11-02T18:29:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-construction-demo/sssssmnm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-construction-demo/sssssmnm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-construction-demo/sssssmnm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-construction-demo/sssssmnm"/>
      <lastmod>2026-11-01T23:36:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-construction-demo/sssssmnm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-construction-demo/sssssmnm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-construction-demo/sssssmnm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-construction-demo/sssssmnm"/>
      <lastmod>2026-11-01T23:36:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/differential-equations-visualization/sssssmnj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differential-equations-visualization/sssssmnj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differential-equations-visualization/sssssmnj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differential-equations-visualization/sssssmnj"/>
      <lastmod>2026-11-02T12:11:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/differential-equations-visualization/sssssmnj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differential-equations-visualization/sssssmnj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differential-equations-visualization/sssssmnj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differential-equations-visualization/sssssmnj"/>
      <lastmod>2026-11-02T12:11:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-subtraction-demo/sssssmnp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-subtraction-demo/sssssmnp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-subtraction-demo/sssssmnp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-subtraction-demo/sssssmnp"/>
      <lastmod>2026-11-02T17:08:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-subtraction-demo/sssssmnp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-subtraction-demo/sssssmnp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-subtraction-demo/sssssmnp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-subtraction-demo/sssssmnp"/>
      <lastmod>2026-11-02T17:08:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/turkey-shape-probability-demo/sssssmnw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/turkey-shape-probability-demo/sssssmnw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/turkey-shape-probability-demo/sssssmnw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/turkey-shape-probability-demo/sssssmnw"/>
      <lastmod>2026-11-01T20:43:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/turkey-shape-probability-demo/sssssmnw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/turkey-shape-probability-demo/sssssmnw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/turkey-shape-probability-demo/sssssmnw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/turkey-shape-probability-demo/sssssmnw"/>
      <lastmod>2026-11-01T20:43:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-curve-example/sssssmn6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curve-example/sssssmn6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curve-example/sssssmn6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curve-example/sssssmn6"/>
      <lastmod>2026-11-01T20:56:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-curve-example/sssssmn6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curve-example/sssssmn6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curve-example/sssssmn6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curve-example/sssssmn6"/>
      <lastmod>2026-11-01T20:56:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-construction-4/sssssmng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-construction-4/sssssmng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-construction-4/sssssmng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-construction-4/sssssmng"/>
      <lastmod>2026-11-02T18:26:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-construction-4/sssssmng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-construction-4/sssssmng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-construction-4/sssssmng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-construction-4/sssssmng"/>
      <lastmod>2026-11-02T18:26:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/statistics-app-2/sssssmn9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-app-2/sssssmn9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-app-2/sssssmn9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-app-2/sssssmn9"/>
      <lastmod>2026-11-02T03:18:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/statistics-app-2/sssssmn9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-app-2/sssssmn9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-app-2/sssssmn9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-app-2/sssssmn9"/>
      <lastmod>2026-11-02T03:18:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-sequence-geometry-application-example/sssssmne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-sequence-geometry-application-example/sssssmne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-sequence-geometry-application-example/sssssmne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-sequence-geometry-application-example/sssssmne"/>
      <lastmod>2026-11-01T23:49:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-sequence-geometry-application-example/sssssmne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-sequence-geometry-application-example/sssssmne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-sequence-geometry-application-example/sssssmne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-sequence-geometry-application-example/sssssmne"/>
      <lastmod>2026-11-01T23:49:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-demonstrating-parabola-and-riemann-sums/sssssmnv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-parabola-and-riemann-sums/sssssmnv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-parabola-and-riemann-sums/sssssmnv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-parabola-and-riemann-sums/sssssmnv"/>
      <lastmod>2026-11-02T17:10:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-demonstrating-parabola-and-riemann-sums/sssssmnv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-parabola-and-riemann-sums/sssssmnv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-parabola-and-riemann-sums/sssssmnv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-parabola-and-riemann-sums/sssssmnv"/>
      <lastmod>2026-11-02T17:10:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shift-parabolas/sssssmn4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shift-parabolas/sssssmn4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shift-parabolas/sssssmn4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shift-parabolas/sssssmn4"/>
      <lastmod>2026-11-02T17:55:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shift-parabolas/sssssmn4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shift-parabolas/sssssmn4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shift-parabolas/sssssmn4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shift-parabolas/sssssmn4"/>
      <lastmod>2026-11-02T17:55:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mapping-diagrams-for-solving-linear-equations/sssssmnl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagrams-for-solving-linear-equations/sssssmnl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagrams-for-solving-linear-equations/sssssmnl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagrams-for-solving-linear-equations/sssssmnl"/>
      <lastmod>2026-11-02T18:19:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mapping-diagrams-for-solving-linear-equations/sssssmnl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagrams-for-solving-linear-equations/sssssmnl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagrams-for-solving-linear-equations/sssssmnl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagrams-for-solving-linear-equations/sssssmnl"/>
      <lastmod>2026-11-02T18:19:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lr3-02-cyu2-determine-equivalence-of-linear-representations/sssssmny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lr3-02-cyu2-determine-equivalence-of-linear-representations/sssssmny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lr3-02-cyu2-determine-equivalence-of-linear-representations/sssssmny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lr3-02-cyu2-determine-equivalence-of-linear-representations/sssssmny"/>
      <lastmod>2026-11-02T02:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lr3-02-cyu2-determine-equivalence-of-linear-representations/sssssmny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lr3-02-cyu2-determine-equivalence-of-linear-representations/sssssmny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lr3-02-cyu2-determine-equivalence-of-linear-representations/sssssmny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lr3-02-cyu2-determine-equivalence-of-linear-representations/sssssmny"/>
      <lastmod>2026-11-02T02:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cardiod-via-chords-of-a-circle/sssssmna</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cardiod-via-chords-of-a-circle/sssssmna"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cardiod-via-chords-of-a-circle/sssssmna"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cardiod-via-chords-of-a-circle/sssssmna"/>
      <lastmod>2026-11-01T21:28:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cardiod-via-chords-of-a-circle/sssssmna</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cardiod-via-chords-of-a-circle/sssssmna"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cardiod-via-chords-of-a-circle/sssssmna"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cardiod-via-chords-of-a-circle/sssssmna"/>
      <lastmod>2026-11-01T21:28:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slicing-a-sphere-into-8-equal-pieces/sssssmnc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-a-sphere-into-8-equal-pieces/sssssmnc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-a-sphere-into-8-equal-pieces/sssssmnc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-a-sphere-into-8-equal-pieces/sssssmnc"/>
      <lastmod>2026-11-01T21:06:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slicing-a-sphere-into-8-equal-pieces/sssssmnc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-a-sphere-into-8-equal-pieces/sssssmnc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-a-sphere-into-8-equal-pieces/sssssmnc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-a-sphere-into-8-equal-pieces/sssssmnc"/>
      <lastmod>2026-11-01T21:06:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sample-means-demo/sssssmnr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-means-demo/sssssmnr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-means-demo/sssssmnr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-means-demo/sssssmnr"/>
      <lastmod>2026-11-02T16:42:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sample-means-demo/sssssmnr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-means-demo/sssssmnr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-means-demo/sssssmnr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-means-demo/sssssmnr"/>
      <lastmod>2026-11-02T16:42:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-transformation-by-ngan-hok-hei/sssssmnh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-by-ngan-hok-hei/sssssmnh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-by-ngan-hok-hei/sssssmnh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-by-ngan-hok-hei/sssssmnh"/>
      <lastmod>2026-11-02T11:48:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-transformation-by-ngan-hok-hei/sssssmnh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-by-ngan-hok-hei/sssssmnh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-by-ngan-hok-hei/sssssmnh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-by-ngan-hok-hei/sssssmnh"/>
      <lastmod>2026-11-02T11:48:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-transformation-by-gabe-thomas/sssssmnt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-transformation-by-gabe-thomas/sssssmnt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-transformation-by-gabe-thomas/sssssmnt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-transformation-by-gabe-thomas/sssssmnt"/>
      <lastmod>2026-11-02T16:35:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-transformation-by-gabe-thomas/sssssmnt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-transformation-by-gabe-thomas/sssssmnt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-transformation-by-gabe-thomas/sssssmnt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-transformation-by-gabe-thomas/sssssmnt"/>
      <lastmod>2026-11-02T16:35:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-area-demonstration-dissection/sssssmnx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-demonstration-dissection/sssssmnx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-demonstration-dissection/sssssmnx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-demonstration-dissection/sssssmnx"/>
      <lastmod>2026-11-02T16:49:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-area-demonstration-dissection/sssssmnx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-demonstration-dissection/sssssmnx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-demonstration-dissection/sssssmnx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-demonstration-dissection/sssssmnx"/>
      <lastmod>2026-11-02T16:49:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-rolling-cup/sssssmni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-rolling-cup/sssssmni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-rolling-cup/sssssmni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-rolling-cup/sssssmni"/>
      <lastmod>2026-11-01T21:19:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-rolling-cup/sssssmni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-rolling-cup/sssssmni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-rolling-cup/sssssmni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-rolling-cup/sssssmni"/>
      <lastmod>2026-11-01T21:19:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/leaf-width-histogram/sssssmno</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/leaf-width-histogram/sssssmno"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/leaf-width-histogram/sssssmno"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/leaf-width-histogram/sssssmno"/>
      <lastmod>2026-11-02T12:41:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/leaf-width-histogram/sssssmno</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/leaf-width-histogram/sssssmno"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/leaf-width-histogram/sssssmno"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/leaf-width-histogram/sssssmno"/>
      <lastmod>2026-11-02T12:41:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/activity-12-introduction-to-dilations/sssssm2s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-12-introduction-to-dilations/sssssm2s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-12-introduction-to-dilations/sssssm2s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-12-introduction-to-dilations/sssssm2s"/>
      <lastmod>2026-11-02T18:25:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/activity-12-introduction-to-dilations/sssssm2s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-12-introduction-to-dilations/sssssm2s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-12-introduction-to-dilations/sssssm2s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-12-introduction-to-dilations/sssssm2s"/>
      <lastmod>2026-11-02T18:25:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-machine-for-multiplication-and-division/sssssm27</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-machine-for-multiplication-and-division/sssssm27"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-machine-for-multiplication-and-division/sssssm27"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-machine-for-multiplication-and-division/sssssm27"/>
      <lastmod>2026-11-02T07:37:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-machine-for-multiplication-and-division/sssssm27</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-machine-for-multiplication-and-division/sssssm27"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-machine-for-multiplication-and-division/sssssm27"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-machine-for-multiplication-and-division/sssssm27"/>
      <lastmod>2026-11-02T07:37:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/building-with-32-snap-cubes/sssssm2n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/building-with-32-snap-cubes/sssssm2n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/building-with-32-snap-cubes/sssssm2n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/building-with-32-snap-cubes/sssssm2n"/>
      <lastmod>2026-11-02T12:20:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/building-with-32-snap-cubes/sssssm2n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/building-with-32-snap-cubes/sssssm2n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/building-with-32-snap-cubes/sssssm2n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/building-with-32-snap-cubes/sssssm2n"/>
      <lastmod>2026-11-02T12:20:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-shapes-exploring-geometric-transformations-of-polygons/sssssm22</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-shapes-exploring-geometric-transformations-of-polygons/sssssm22"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-shapes-exploring-geometric-transformations-of-polygons/sssssm22"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-shapes-exploring-geometric-transformations-of-polygons/sssssm22"/>
      <lastmod>2026-11-01T20:41:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-shapes-exploring-geometric-transformations-of-polygons/sssssm22</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-shapes-exploring-geometric-transformations-of-polygons/sssssm22"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-shapes-exploring-geometric-transformations-of-polygons/sssssm22"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-shapes-exploring-geometric-transformations-of-polygons/sssssm22"/>
      <lastmod>2026-11-01T20:41:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/long-run-probability/sssssm2k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/long-run-probability/sssssm2k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/long-run-probability/sssssm2k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/long-run-probability/sssssm2k"/>
      <lastmod>2026-11-02T02:34:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/long-run-probability/sssssm2k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/long-run-probability/sssssm2k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/long-run-probability/sssssm2k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/long-run-probability/sssssm2k"/>
      <lastmod>2026-11-02T02:34:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-resolution-demo/sssssm2z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-resolution-demo/sssssm2z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-resolution-demo/sssssm2z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-resolution-demo/sssssm2z"/>
      <lastmod>2026-11-01T19:23:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-resolution-demo/sssssm2z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-resolution-demo/sssssm2z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-resolution-demo/sssssm2z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-resolution-demo/sssssm2z"/>
      <lastmod>2026-11-01T19:23:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inequalities-example/sssssm20</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-example/sssssm20"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-example/sssssm20"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-example/sssssm20"/>
      <lastmod>2026-11-02T16:45:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inequalities-example/sssssm20</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-example/sssssm20"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-example/sssssm20"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-example/sssssm20"/>
      <lastmod>2026-11-02T16:45:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-example-2-vectors-and-distance/sssssm2d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-example-2-vectors-and-distance/sssssm2d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-example-2-vectors-and-distance/sssssm2d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-example-2-vectors-and-distance/sssssm2d"/>
      <lastmod>2026-11-02T09:32:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-example-2-vectors-and-distance/sssssm2d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-example-2-vectors-and-distance/sssssm2d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-example-2-vectors-and-distance/sssssm2d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-example-2-vectors-and-distance/sssssm2d"/>
      <lastmod>2026-11-02T09:32:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-spheres-copy-no-proof-window/sssssm2f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-spheres-copy-no-proof-window/sssssm2f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-spheres-copy-no-proof-window/sssssm2f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-spheres-copy-no-proof-window/sssssm2f"/>
      <lastmod>2026-11-02T17:36:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-spheres-copy-no-proof-window/sssssm2f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-spheres-copy-no-proof-window/sssssm2f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-spheres-copy-no-proof-window/sssssm2f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-spheres-copy-no-proof-window/sssssm2f"/>
      <lastmod>2026-11-02T17:36:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dispersion-of-white-light-by-a-prism-geometric-simulation/sssssm28</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dispersion-of-white-light-by-a-prism-geometric-simulation/sssssm28"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dispersion-of-white-light-by-a-prism-geometric-simulation/sssssm28"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dispersion-of-white-light-by-a-prism-geometric-simulation/sssssm28"/>
      <lastmod>2026-11-02T00:57:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dispersion-of-white-light-by-a-prism-geometric-simulation/sssssm28</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dispersion-of-white-light-by-a-prism-geometric-simulation/sssssm28"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dispersion-of-white-light-by-a-prism-geometric-simulation/sssssm28"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dispersion-of-white-light-by-a-prism-geometric-simulation/sssssm28"/>
      <lastmod>2026-11-02T00:57:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curve-stitching-in-a-triangle-parabolas-and-directrix/sssssm2u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching-in-a-triangle-parabolas-and-directrix/sssssm2u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-in-a-triangle-parabolas-and-directrix/sssssm2u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching-in-a-triangle-parabolas-and-directrix/sssssm2u"/>
      <lastmod>2026-11-02T15:28:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curve-stitching-in-a-triangle-parabolas-and-directrix/sssssm2u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching-in-a-triangle-parabolas-and-directrix/sssssm2u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-in-a-triangle-parabolas-and-directrix/sssssm2u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-stitching-in-a-triangle-parabolas-and-directrix/sssssm2u"/>
      <lastmod>2026-11-02T15:28:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/electric-field-visualization/sssssm25</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/electric-field-visualization/sssssm25"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/electric-field-visualization/sssssm25"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/electric-field-visualization/sssssm25"/>
      <lastmod>2026-11-02T16:31:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/electric-field-visualization/sssssm25</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/electric-field-visualization/sssssm25"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/electric-field-visualization/sssssm25"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/electric-field-visualization/sssssm25"/>
      <lastmod>2026-11-02T16:31:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-and-similar-triangles/sssssm2b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-and-similar-triangles/sssssm2b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-and-similar-triangles/sssssm2b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-and-similar-triangles/sssssm2b"/>
      <lastmod>2026-11-01T19:24:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-and-similar-triangles/sssssm2b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-and-similar-triangles/sssssm2b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-and-similar-triangles/sssssm2b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-and-similar-triangles/sssssm2b"/>
      <lastmod>2026-11-01T19:24:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-space/sssssm23</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-space/sssssm23"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-space/sssssm23"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-space/sssssm23"/>
      <lastmod>2026-11-01T21:24:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-space/sssssm23</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-space/sssssm23"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-space/sssssm23"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-space/sssssm23"/>
      <lastmod>2026-11-01T21:24:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-and-reflection/sssssm2q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-and-reflection/sssssm2q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-and-reflection/sssssm2q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-and-reflection/sssssm2q"/>
      <lastmod>2026-11-02T18:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-and-reflection/sssssm2q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-and-reflection/sssssm2q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-and-reflection/sssssm2q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-and-reflection/sssssm2q"/>
      <lastmod>2026-11-02T18:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/axis-of-symmetry/sssssm21</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axis-of-symmetry/sssssm21"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axis-of-symmetry/sssssm21"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axis-of-symmetry/sssssm21"/>
      <lastmod>2026-11-02T15:48:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/axis-of-symmetry/sssssm21</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axis-of-symmetry/sssssm21"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axis-of-symmetry/sssssm21"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axis-of-symmetry/sssssm21"/>
      <lastmod>2026-11-02T15:48:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-trapeziums-geometric-derivation-and-dynamic-demonstration/sssssm2m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-trapeziums-geometric-derivation-and-dynamic-demonstration/sssssm2m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-trapeziums-geometric-derivation-and-dynamic-demonstration/sssssm2m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-trapeziums-geometric-derivation-and-dynamic-demonstration/sssssm2m"/>
      <lastmod>2026-11-02T02:46:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-trapeziums-geometric-derivation-and-dynamic-demonstration/sssssm2m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-trapeziums-geometric-derivation-and-dynamic-demonstration/sssssm2m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-trapeziums-geometric-derivation-and-dynamic-demonstration/sssssm2m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-trapeziums-geometric-derivation-and-dynamic-demonstration/sssssm2m"/>
      <lastmod>2026-11-02T02:46:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pentagon-with-rotational-symmetry/sssssm2j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagon-with-rotational-symmetry/sssssm2j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagon-with-rotational-symmetry/sssssm2j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagon-with-rotational-symmetry/sssssm2j"/>
      <lastmod>2026-11-02T03:10:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pentagon-with-rotational-symmetry/sssssm2j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagon-with-rotational-symmetry/sssssm2j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagon-with-rotational-symmetry/sssssm2j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagon-with-rotational-symmetry/sssssm2j"/>
      <lastmod>2026-11-02T03:10:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sets-and-probability/sssssm2p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sets-and-probability/sssssm2p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sets-and-probability/sssssm2p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sets-and-probability/sssssm2p"/>
      <lastmod>2026-11-02T12:21:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sets-and-probability/sssssm2p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sets-and-probability/sssssm2p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sets-and-probability/sssssm2p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sets-and-probability/sssssm2p"/>
      <lastmod>2026-11-02T12:21:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-the-moves/sssssm2w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-the-moves/sssssm2w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-the-moves/sssssm2w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-the-moves/sssssm2w"/>
      <lastmod>2026-11-01T20:33:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-the-moves/sssssm2w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-the-moves/sssssm2w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-the-moves/sssssm2w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-the-moves/sssssm2w"/>
      <lastmod>2026-11-01T20:33:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/latitude-and-longitude-3d-sphere-with-parametric-curves-and-coordinate-grid/sssssm26</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/latitude-and-longitude-3d-sphere-with-parametric-curves-and-coordinate-grid/sssssm26"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/latitude-and-longitude-3d-sphere-with-parametric-curves-and-coordinate-grid/sssssm26"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/latitude-and-longitude-3d-sphere-with-parametric-curves-and-coordinate-grid/sssssm26"/>
      <lastmod>2026-11-02T18:57:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/latitude-and-longitude-3d-sphere-with-parametric-curves-and-coordinate-grid/sssssm26</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/latitude-and-longitude-3d-sphere-with-parametric-curves-and-coordinate-grid/sssssm26"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/latitude-and-longitude-3d-sphere-with-parametric-curves-and-coordinate-grid/sssssm26"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/latitude-and-longitude-3d-sphere-with-parametric-curves-and-coordinate-grid/sssssm26"/>
      <lastmod>2026-11-02T18:57:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-kite-by-hduong2020/sssssm2g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-kite-by-hduong2020/sssssm2g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-kite-by-hduong2020/sssssm2g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-kite-by-hduong2020/sssssm2g"/>
      <lastmod>2026-11-02T16:48:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-kite-by-hduong2020/sssssm2g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-kite-by-hduong2020/sssssm2g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-kite-by-hduong2020/sssssm2g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-kite-by-hduong2020/sssssm2g"/>
      <lastmod>2026-11-02T16:48:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/place-value-blocks/sssssm29</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/place-value-blocks/sssssm29"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/place-value-blocks/sssssm29"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/place-value-blocks/sssssm29"/>
      <lastmod>2026-11-02T17:13:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/place-value-blocks/sssssm29</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/place-value-blocks/sssssm29"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/place-value-blocks/sssssm29"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/place-value-blocks/sssssm29"/>
      <lastmod>2026-11-02T17:13:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/points-planes-and-lines/sssssm2e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-planes-and-lines/sssssm2e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-planes-and-lines/sssssm2e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-planes-and-lines/sssssm2e"/>
      <lastmod>2026-11-01T21:28:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/points-planes-and-lines/sssssm2e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-planes-and-lines/sssssm2e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-planes-and-lines/sssssm2e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-planes-and-lines/sssssm2e"/>
      <lastmod>2026-11-01T21:28:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-tailed-z-test/sssssm2v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-tailed-z-test/sssssm2v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-tailed-z-test/sssssm2v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-tailed-z-test/sssssm2v"/>
      <lastmod>2026-11-02T15:29:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-tailed-z-test/sssssm2v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-tailed-z-test/sssssm2v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-tailed-z-test/sssssm2v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-tailed-z-test/sssssm2v"/>
      <lastmod>2026-11-02T15:29:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/launch-angle-vs-range-distance-data-collection/sssssm24</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/launch-angle-vs-range-distance-data-collection/sssssm24"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/launch-angle-vs-range-distance-data-collection/sssssm24"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/launch-angle-vs-range-distance-data-collection/sssssm24"/>
      <lastmod>2026-11-01T22:00:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/launch-angle-vs-range-distance-data-collection/sssssm24</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/launch-angle-vs-range-distance-data-collection/sssssm24"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/launch-angle-vs-range-distance-data-collection/sssssm24"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/launch-angle-vs-range-distance-data-collection/sssssm24"/>
      <lastmod>2026-11-01T22:00:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-copy-an-angle-by-coach-suzzette/sssssm2l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-copy-an-angle-by-coach-suzzette/sssssm2l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-copy-an-angle-by-coach-suzzette/sssssm2l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-copy-an-angle-by-coach-suzzette/sssssm2l"/>
      <lastmod>2026-11-02T02:19:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-copy-an-angle-by-coach-suzzette/sssssm2l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-copy-an-angle-by-coach-suzzette/sssssm2l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-copy-an-angle-by-coach-suzzette/sssssm2l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-copy-an-angle-by-coach-suzzette/sssssm2l"/>
      <lastmod>2026-11-02T02:19:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/non-square-rhombus-by-422074/sssssm2y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-422074/sssssm2y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-square-rhombus-by-422074/sssssm2y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-422074/sssssm2y"/>
      <lastmod>2026-11-02T18:40:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/non-square-rhombus-by-422074/sssssm2y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-422074/sssssm2y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-square-rhombus-by-422074/sssssm2y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-422074/sssssm2y"/>
      <lastmod>2026-11-02T18:40:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-equations-with-sliders-center-radius-form/sssssm2a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-equations-with-sliders-center-radius-form/sssssm2a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-equations-with-sliders-center-radius-form/sssssm2a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-equations-with-sliders-center-radius-form/sssssm2a"/>
      <lastmod>2026-11-02T17:49:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-equations-with-sliders-center-radius-form/sssssm2a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-equations-with-sliders-center-radius-form/sssssm2a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-equations-with-sliders-center-radius-form/sssssm2a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-equations-with-sliders-center-radius-form/sssssm2a"/>
      <lastmod>2026-11-02T17:49:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-octagon-and-sphere/sssssm2c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-octagon-and-sphere/sssssm2c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-octagon-and-sphere/sssssm2c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-octagon-and-sphere/sssssm2c"/>
      <lastmod>2026-11-01T21:56:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-octagon-and-sphere/sssssm2c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-octagon-and-sphere/sssssm2c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-octagon-and-sphere/sssssm2c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-octagon-and-sphere/sssssm2c"/>
      <lastmod>2026-11-01T21:56:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-decimal-percentage-equivalents/sssssm2r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-decimal-percentage-equivalents/sssssm2r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-decimal-percentage-equivalents/sssssm2r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-decimal-percentage-equivalents/sssssm2r"/>
      <lastmod>2026-11-02T17:46:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-decimal-percentage-equivalents/sssssm2r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-decimal-percentage-equivalents/sssssm2r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-decimal-percentage-equivalents/sssssm2r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-decimal-percentage-equivalents/sssssm2r"/>
      <lastmod>2026-11-02T17:46:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/statistics-on-rainy-days-in-singapore-1982-2019/sssssm2h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-on-rainy-days-in-singapore-1982-2019/sssssm2h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-on-rainy-days-in-singapore-1982-2019/sssssm2h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-on-rainy-days-in-singapore-1982-2019/sssssm2h"/>
      <lastmod>2026-11-01T19:31:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/statistics-on-rainy-days-in-singapore-1982-2019/sssssm2h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-on-rainy-days-in-singapore-1982-2019/sssssm2h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-on-rainy-days-in-singapore-1982-2019/sssssm2h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-on-rainy-days-in-singapore-1982-2019/sssssm2h"/>
      <lastmod>2026-11-01T19:31:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-graphing-linear-equations-v1/sssssm2t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-graphing-linear-equations-v1/sssssm2t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-graphing-linear-equations-v1/sssssm2t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-graphing-linear-equations-v1/sssssm2t"/>
      <lastmod>2026-11-01T21:23:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-graphing-linear-equations-v1/sssssm2t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-graphing-linear-equations-v1/sssssm2t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-graphing-linear-equations-v1/sssssm2t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-graphing-linear-equations-v1/sssssm2t"/>
      <lastmod>2026-11-01T21:23:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/describing-trends-in-scatter-plots-im-8-6-5-lesson/sssssm2x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/describing-trends-in-scatter-plots-im-8-6-5-lesson/sssssm2x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/describing-trends-in-scatter-plots-im-8-6-5-lesson/sssssm2x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/describing-trends-in-scatter-plots-im-8-6-5-lesson/sssssm2x"/>
      <lastmod>2026-11-02T10:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/describing-trends-in-scatter-plots-im-8-6-5-lesson/sssssm2x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/describing-trends-in-scatter-plots-im-8-6-5-lesson/sssssm2x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/describing-trends-in-scatter-plots-im-8-6-5-lesson/sssssm2x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/describing-trends-in-scatter-plots-im-8-6-5-lesson/sssssm2x"/>
      <lastmod>2026-11-02T10:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/non-square-rhombus-by-421418/sssssm2i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-421418/sssssm2i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-square-rhombus-by-421418/sssssm2i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-421418/sssssm2i"/>
      <lastmod>2026-11-02T18:40:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/non-square-rhombus-by-421418/sssssm2i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-421418/sssssm2i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-square-rhombus-by-421418/sssssm2i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-421418/sssssm2i"/>
      <lastmod>2026-11-02T18:40:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-sines/sssssm2o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-sines/sssssm2o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-sines/sssssm2o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-sines/sssssm2o"/>
      <lastmod>2026-11-01T23:50:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-sines/sssssm2o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-sines/sssssm2o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-sines/sssssm2o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-sines/sssssm2o"/>
      <lastmod>2026-11-01T23:50:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-ar-interactive-demonstration/sssssmks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-ar-interactive-demonstration/sssssmks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-ar-interactive-demonstration/sssssmks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-ar-interactive-demonstration/sssssmks"/>
      <lastmod>2026-11-01T19:28:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-ar-interactive-demonstration/sssssmks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-ar-interactive-demonstration/sssssmks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-ar-interactive-demonstration/sssssmks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-ar-interactive-demonstration/sssssmks"/>
      <lastmod>2026-11-01T19:28:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/approximating-a-double-integral-with-prisms/sssssmk7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-a-double-integral-with-prisms/sssssmk7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-a-double-integral-with-prisms/sssssmk7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-a-double-integral-with-prisms/sssssmk7"/>
      <lastmod>2026-11-01T23:10:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/approximating-a-double-integral-with-prisms/sssssmk7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-a-double-integral-with-prisms/sssssmk7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-a-double-integral-with-prisms/sssssmk7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-a-double-integral-with-prisms/sssssmk7"/>
      <lastmod>2026-11-01T23:10:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/approximating-an-ellipse-with-arcs/sssssmkn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-an-ellipse-with-arcs/sssssmkn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-an-ellipse-with-arcs/sssssmkn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-an-ellipse-with-arcs/sssssmkn"/>
      <lastmod>2026-11-02T12:21:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/approximating-an-ellipse-with-arcs/sssssmkn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-an-ellipse-with-arcs/sssssmkn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-an-ellipse-with-arcs/sssssmkn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-an-ellipse-with-arcs/sssssmkn"/>
      <lastmod>2026-11-02T12:21:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-across-the-y-axis-by-nicola-trubridge/sssssmk2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-across-the-y-axis-by-nicola-trubridge/sssssmk2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-across-the-y-axis-by-nicola-trubridge/sssssmk2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-across-the-y-axis-by-nicola-trubridge/sssssmk2"/>
      <lastmod>2026-11-01T21:16:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-across-the-y-axis-by-nicola-trubridge/sssssmk2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-across-the-y-axis-by-nicola-trubridge/sssssmk2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-across-the-y-axis-by-nicola-trubridge/sssssmk2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-across-the-y-axis-by-nicola-trubridge/sssssmk2"/>
      <lastmod>2026-11-01T21:16:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-as-a-function/sssssmkk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-as-a-function/sssssmkk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-as-a-function/sssssmkk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-as-a-function/sssssmkk"/>
      <lastmod>2026-11-02T02:40:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-as-a-function/sssssmkk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-as-a-function/sssssmkk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-as-a-function/sssssmkk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-as-a-function/sssssmkk"/>
      <lastmod>2026-11-02T02:40:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-to-a-segment-through-a-non-collinear-point/sssssmkz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-to-a-segment-through-a-non-collinear-point/sssssmkz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-to-a-segment-through-a-non-collinear-point/sssssmkz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-to-a-segment-through-a-non-collinear-point/sssssmkz"/>
      <lastmod>2026-11-02T16:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-to-a-segment-through-a-non-collinear-point/sssssmkz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-to-a-segment-through-a-non-collinear-point/sssssmkz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-to-a-segment-through-a-non-collinear-point/sssssmkz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-to-a-segment-through-a-non-collinear-point/sssssmkz"/>
      <lastmod>2026-11-02T16:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/midsegments/sssssmk0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midsegments/sssssmk0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midsegments/sssssmk0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midsegments/sssssmk0"/>
      <lastmod>2026-11-02T16:49:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/midsegments/sssssmk0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midsegments/sssssmk0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midsegments/sssssmk0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midsegments/sssssmk0"/>
      <lastmod>2026-11-02T16:49:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-lines-related-angles/sssssmkd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-related-angles/sssssmkd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-related-angles/sssssmkd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-related-angles/sssssmkd"/>
      <lastmod>2026-11-02T00:32:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-lines-related-angles/sssssmkd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-related-angles/sssssmkd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-related-angles/sssssmkd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-related-angles/sssssmkd"/>
      <lastmod>2026-11-02T00:32:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adjacent-angles-of-a-parallelogram/sssssmkf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjacent-angles-of-a-parallelogram/sssssmkf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjacent-angles-of-a-parallelogram/sssssmkf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjacent-angles-of-a-parallelogram/sssssmkf"/>
      <lastmod>2026-11-02T13:05:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adjacent-angles-of-a-parallelogram/sssssmkf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjacent-angles-of-a-parallelogram/sssssmkf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjacent-angles-of-a-parallelogram/sssssmkf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjacent-angles-of-a-parallelogram/sssssmkf"/>
      <lastmod>2026-11-02T13:05:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/steps-for-adding-fractions/sssssmk8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steps-for-adding-fractions/sssssmk8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steps-for-adding-fractions/sssssmk8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steps-for-adding-fractions/sssssmk8"/>
      <lastmod>2026-11-01T19:02:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/steps-for-adding-fractions/sssssmk8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steps-for-adding-fractions/sssssmk8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steps-for-adding-fractions/sssssmk8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steps-for-adding-fractions/sssssmk8"/>
      <lastmod>2026-11-01T19:02:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ssa-triangles/sssssmku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ssa-triangles/sssssmku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ssa-triangles/sssssmku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ssa-triangles/sssssmku"/>
      <lastmod>2026-11-02T18:57:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ssa-triangles/sssssmku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ssa-triangles/sssssmku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ssa-triangles/sssssmku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ssa-triangles/sssssmku"/>
      <lastmod>2026-11-02T18:57:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/first-order-ode-solver/sssssmk5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-order-ode-solver/sssssmk5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-order-ode-solver/sssssmk5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-order-ode-solver/sssssmk5"/>
      <lastmod>2026-11-01T21:50:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/first-order-ode-solver/sssssmk5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-order-ode-solver/sssssmk5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-order-ode-solver/sssssmk5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-order-ode-solver/sssssmk5"/>
      <lastmod>2026-11-01T21:50:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-tangent-to-two-given-circles/sssssmkb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-tangent-to-two-given-circles/sssssmkb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-tangent-to-two-given-circles/sssssmkb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-tangent-to-two-given-circles/sssssmkb"/>
      <lastmod>2026-11-01T21:58:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-tangent-to-two-given-circles/sssssmkb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-tangent-to-two-given-circles/sssssmkb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-tangent-to-two-given-circles/sssssmkb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-tangent-to-two-given-circles/sssssmkb"/>
      <lastmod>2026-11-01T21:58:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-of-solids-of-revolution/sssssmk3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-solids-of-revolution/sssssmk3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-solids-of-revolution/sssssmk3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-solids-of-revolution/sssssmk3"/>
      <lastmod>2026-11-01T19:35:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-of-solids-of-revolution/sssssmk3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-solids-of-revolution/sssssmk3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-solids-of-revolution/sssssmk3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-solids-of-revolution/sssssmk3"/>
      <lastmod>2026-11-01T19:35:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-and-congruence-polygon-translation/sssssmkq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-and-congruence-polygon-translation/sssssmkq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-and-congruence-polygon-translation/sssssmkq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-and-congruence-polygon-translation/sssssmkq"/>
      <lastmod>2026-11-02T17:04:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-and-congruence-polygon-translation/sssssmkq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-and-congruence-polygon-translation/sssssmkq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-and-congruence-polygon-translation/sssssmkq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-and-congruence-polygon-translation/sssssmkq"/>
      <lastmod>2026-11-02T17:04:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/suggs-polygons/sssssmk1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/suggs-polygons/sssssmk1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/suggs-polygons/sssssmk1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/suggs-polygons/sssssmk1"/>
      <lastmod>2026-11-01T19:09:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/suggs-polygons/sssssmk1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/suggs-polygons/sssssmk1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/suggs-polygons/sssssmk1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/suggs-polygons/sssssmk1"/>
      <lastmod>2026-11-01T19:09:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copy-and-solve-simple-linear-equations-apply-balance-concept/sssssmkm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-and-solve-simple-linear-equations-apply-balance-concept/sssssmkm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-and-solve-simple-linear-equations-apply-balance-concept/sssssmkm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-and-solve-simple-linear-equations-apply-balance-concept/sssssmkm"/>
      <lastmod>2026-11-01T20:49:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copy-and-solve-simple-linear-equations-apply-balance-concept/sssssmkm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-and-solve-simple-linear-equations-apply-balance-concept/sssssmkm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-and-solve-simple-linear-equations-apply-balance-concept/sssssmkm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-and-solve-simple-linear-equations-apply-balance-concept/sssssmkm"/>
      <lastmod>2026-11-01T20:49:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-law-demonstration-with-draggable-points/sssssmkj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-law-demonstration-with-draggable-points/sssssmkj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-law-demonstration-with-draggable-points/sssssmkj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-law-demonstration-with-draggable-points/sssssmkj"/>
      <lastmod>2026-11-02T02:28:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-law-demonstration-with-draggable-points/sssssmkj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-law-demonstration-with-draggable-points/sssssmkj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-law-demonstration-with-draggable-points/sssssmkj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-law-demonstration-with-draggable-points/sssssmkj"/>
      <lastmod>2026-11-02T02:28:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-by-surya-magar/sssssmkp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-surya-magar/sssssmkp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-by-surya-magar/sssssmkp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-surya-magar/sssssmkp"/>
      <lastmod>2026-11-02T16:43:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-by-surya-magar/sssssmkp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-surya-magar/sssssmkp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-by-surya-magar/sssssmkp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-surya-magar/sssssmkp"/>
      <lastmod>2026-11-02T16:43:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-for-class-9/sssssmkw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-for-class-9/sssssmkw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-for-class-9/sssssmkw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-for-class-9/sssssmkw"/>
      <lastmod>2026-11-02T17:58:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-for-class-9/sssssmkw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-for-class-9/sssssmkw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-for-class-9/sssssmkw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-for-class-9/sssssmkw"/>
      <lastmod>2026-11-02T17:58:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-trapeziums/sssssmk6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-trapeziums/sssssmk6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-trapeziums/sssssmk6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-trapeziums/sssssmk6"/>
      <lastmod>2026-11-02T17:35:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-trapeziums/sssssmk6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-trapeziums/sssssmk6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-trapeziums/sssssmk6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-trapeziums/sssssmk6"/>
      <lastmod>2026-11-02T17:35:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fun-with-decimals/sssssmkg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fun-with-decimals/sssssmkg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fun-with-decimals/sssssmkg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fun-with-decimals/sssssmkg"/>
      <lastmod>2026-11-02T16:49:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fun-with-decimals/sssssmkg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fun-with-decimals/sssssmkg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fun-with-decimals/sssssmkg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fun-with-decimals/sssssmkg"/>
      <lastmod>2026-11-02T16:49:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersecting-reflections-ii/sssssmk9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-reflections-ii/sssssmk9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-reflections-ii/sssssmk9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-reflections-ii/sssssmk9"/>
      <lastmod>2026-11-02T17:06:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersecting-reflections-ii/sssssmk9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-reflections-ii/sssssmk9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-reflections-ii/sssssmk9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-reflections-ii/sssssmk9"/>
      <lastmod>2026-11-02T17:06:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-blue-wave-with-spheres/sssssmke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-blue-wave-with-spheres/sssssmke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-blue-wave-with-spheres/sssssmke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-blue-wave-with-spheres/sssssmke"/>
      <lastmod>2026-11-02T16:32:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-blue-wave-with-spheres/sssssmke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-blue-wave-with-spheres/sssssmke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-blue-wave-with-spheres/sssssmke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-blue-wave-with-spheres/sssssmke"/>
      <lastmod>2026-11-02T16:32:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-calculation-demo/sssssmkv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-demo/sssssmkv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-demo/sssssmkv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-demo/sssssmkv"/>
      <lastmod>2026-11-02T18:23:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-calculation-demo/sssssmkv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-demo/sssssmkv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-demo/sssssmkv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-demo/sssssmkv"/>
      <lastmod>2026-11-02T18:23:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-alex-smith/sssssmk4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-alex-smith/sssssmk4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-sphere-by-alex-smith/sssssmk4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-alex-smith/sssssmk4"/>
      <lastmod>2026-11-02T13:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-sphere-by-alex-smith/sssssmk4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-alex-smith/sssssmk4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-sphere-by-alex-smith/sssssmk4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-alex-smith/sssssmk4"/>
      <lastmod>2026-11-02T13:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-demo/sssssmkl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-demo/sssssmkl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-demo/sssssmkl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-demo/sssssmkl"/>
      <lastmod>2026-11-01T19:27:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-demo/sssssmkl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-demo/sssssmkl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-demo/sssssmkl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-demo/sssssmkl"/>
      <lastmod>2026-11-01T19:27:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-multiplication-of-improper-fractions-by-whole-numbers/sssssmky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-multiplication-of-improper-fractions-by-whole-numbers/sssssmky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-multiplication-of-improper-fractions-by-whole-numbers/sssssmky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-multiplication-of-improper-fractions-by-whole-numbers/sssssmky"/>
      <lastmod>2026-11-01T23:45:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-multiplication-of-improper-fractions-by-whole-numbers/sssssmky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-multiplication-of-improper-fractions-by-whole-numbers/sssssmky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-multiplication-of-improper-fractions-by-whole-numbers/sssssmky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-multiplication-of-improper-fractions-by-whole-numbers/sssssmky"/>
      <lastmod>2026-11-01T23:45:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-square-pyramid/sssssmka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-square-pyramid/sssssmka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-square-pyramid/sssssmka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-square-pyramid/sssssmka"/>
      <lastmod>2026-11-02T17:02:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-square-pyramid/sssssmka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-square-pyramid/sssssmka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-square-pyramid/sssssmka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-square-pyramid/sssssmka"/>
      <lastmod>2026-11-02T17:02:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagoras-theorem-3-polygons/sssssmkc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-3-polygons/sssssmkc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-theorem-3-polygons/sssssmkc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-3-polygons/sssssmkc"/>
      <lastmod>2026-11-01T20:38:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagoras-theorem-3-polygons/sssssmkc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-3-polygons/sssssmkc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-theorem-3-polygons/sssssmkc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-3-polygons/sssssmkc"/>
      <lastmod>2026-11-01T20:38:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisector-construction-by-dan-dale/sssssmkr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-construction-by-dan-dale/sssssmkr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-construction-by-dan-dale/sssssmkr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-construction-by-dan-dale/sssssmkr"/>
      <lastmod>2026-11-01T21:52:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisector-construction-by-dan-dale/sssssmkr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-construction-by-dan-dale/sssssmkr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-construction-by-dan-dale/sssssmkr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-construction-by-dan-dale/sssssmkr"/>
      <lastmod>2026-11-01T21:52:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/paper-folding-ellipse/sssssmkh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paper-folding-ellipse/sssssmkh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paper-folding-ellipse/sssssmkh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paper-folding-ellipse/sssssmkh"/>
      <lastmod>2026-11-02T16:48:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/paper-folding-ellipse/sssssmkh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paper-folding-ellipse/sssssmkh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paper-folding-ellipse/sssssmkh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paper-folding-ellipse/sssssmkh"/>
      <lastmod>2026-11-02T16:48:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sas-for-triangle-congruence/sssssmkt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-for-triangle-congruence/sssssmkt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-for-triangle-congruence/sssssmkt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-for-triangle-congruence/sssssmkt"/>
      <lastmod>2026-11-02T02:47:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sas-for-triangle-congruence/sssssmkt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-for-triangle-congruence/sssssmkt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-for-triangle-congruence/sssssmkt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-for-triangle-congruence/sssssmkt"/>
      <lastmod>2026-11-02T02:47:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surfboard-or-canoe-surface/sssssmkx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surfboard-or-canoe-surface/sssssmkx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surfboard-or-canoe-surface/sssssmkx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surfboard-or-canoe-surface/sssssmkx"/>
      <lastmod>2026-11-02T18:27:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surfboard-or-canoe-surface/sssssmkx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surfboard-or-canoe-surface/sssssmkx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surfboard-or-canoe-surface/sssssmkx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surfboard-or-canoe-surface/sssssmkx"/>
      <lastmod>2026-11-02T18:27:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-and-distributive-law-demo/sssssmki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-distributive-law-demo/sssssmki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-distributive-law-demo/sssssmki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-distributive-law-demo/sssssmki"/>
      <lastmod>2026-11-02T12:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-and-distributive-law-demo/sssssmki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-distributive-law-demo/sssssmki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-distributive-law-demo/sssssmki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-distributive-law-demo/sssssmki"/>
      <lastmod>2026-11-02T12:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-3/sssssmko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-3/sssssmko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-3/sssssmko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-3/sssssmko"/>
      <lastmod>2026-11-02T16:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-3/sssssmko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-3/sssssmko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-3/sssssmko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-3/sssssmko"/>
      <lastmod>2026-11-02T16:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-parabola-focus-directrix-and-tangent-reflection/sssssmzs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-parabola-focus-directrix-and-tangent-reflection/sssssmzs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-parabola-focus-directrix-and-tangent-reflection/sssssmzs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-parabola-focus-directrix-and-tangent-reflection/sssssmzs"/>
      <lastmod>2026-11-02T17:56:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-parabola-focus-directrix-and-tangent-reflection/sssssmzs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-parabola-focus-directrix-and-tangent-reflection/sssssmzs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-parabola-focus-directrix-and-tangent-reflection/sssssmzs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-parabola-focus-directrix-and-tangent-reflection/sssssmzs"/>
      <lastmod>2026-11-02T17:56:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-classic-geometry-activity-template/sssssmz7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-classic-geometry-activity-template/sssssmz7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-classic-geometry-activity-template/sssssmz7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-classic-geometry-activity-template/sssssmz7"/>
      <lastmod>2026-11-01T19:03:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-classic-geometry-activity-template/sssssmz7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-classic-geometry-activity-template/sssssmz7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-classic-geometry-activity-template/sssssmz7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-classic-geometry-activity-template/sssssmz7"/>
      <lastmod>2026-11-01T19:03:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-by-peter-myers/sssssmzn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-by-peter-myers/sssssmzn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-by-peter-myers/sssssmzn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-by-peter-myers/sssssmzn"/>
      <lastmod>2026-11-02T09:27:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-by-peter-myers/sssssmzn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-by-peter-myers/sssssmzn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-by-peter-myers/sssssmzn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-by-peter-myers/sssssmzn"/>
      <lastmod>2026-11-02T09:27:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/12-and-9-pointed-stars/sssssmz2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/12-and-9-pointed-stars/sssssmz2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/12-and-9-pointed-stars/sssssmz2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/12-and-9-pointed-stars/sssssmz2"/>
      <lastmod>2026-11-02T02:17:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/12-and-9-pointed-stars/sssssmz2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/12-and-9-pointed-stars/sssssmz2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/12-and-9-pointed-stars/sssssmz2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/12-and-9-pointed-stars/sssssmz2"/>
      <lastmod>2026-11-02T02:17:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/butterbaugh-3d-prisms/sssssmzk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/butterbaugh-3d-prisms/sssssmzk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/butterbaugh-3d-prisms/sssssmzk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/butterbaugh-3d-prisms/sssssmzk"/>
      <lastmod>2026-11-02T17:17:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/butterbaugh-3d-prisms/sssssmzk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/butterbaugh-3d-prisms/sssssmzk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/butterbaugh-3d-prisms/sssssmzk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/butterbaugh-3d-prisms/sssssmzk"/>
      <lastmod>2026-11-02T17:17:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/guess-the-incenter/sssssmzz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/guess-the-incenter/sssssmzz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/guess-the-incenter/sssssmzz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/guess-the-incenter/sssssmzz"/>
      <lastmod>2026-11-01T20:47:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/guess-the-incenter/sssssmzz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/guess-the-incenter/sssssmzz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/guess-the-incenter/sssssmzz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/guess-the-incenter/sssssmzz"/>
      <lastmod>2026-11-01T20:47:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-theorem-3-illustrated-without-words/sssssmz0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-theorem-3-illustrated-without-words/sssssmz0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-theorem-3-illustrated-without-words/sssssmz0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-theorem-3-illustrated-without-words/sssssmz0"/>
      <lastmod>2026-11-02T15:15:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-theorem-3-illustrated-without-words/sssssmz0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-theorem-3-illustrated-without-words/sssssmz0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-theorem-3-illustrated-without-words/sssssmz0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-theorem-3-illustrated-without-words/sssssmz0"/>
      <lastmod>2026-11-02T15:15:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-function-transformations/sssssmzd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-transformations/sssssmzd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-transformations/sssssmzd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-transformations/sssssmzd"/>
      <lastmod>2026-11-02T13:33:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-function-transformations/sssssmzd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-transformations/sssssmzd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-transformations/sssssmzd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-transformations/sssssmzd"/>
      <lastmod>2026-11-02T13:33:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/central-limit-theorem-on-tossing-a-fair-die/sssssmzf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-limit-theorem-on-tossing-a-fair-die/sssssmzf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-limit-theorem-on-tossing-a-fair-die/sssssmzf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-limit-theorem-on-tossing-a-fair-die/sssssmzf"/>
      <lastmod>2026-11-01T23:19:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/central-limit-theorem-on-tossing-a-fair-die/sssssmzf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-limit-theorem-on-tossing-a-fair-die/sssssmzf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-limit-theorem-on-tossing-a-fair-die/sssssmzf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-limit-theorem-on-tossing-a-fair-die/sssssmzf"/>
      <lastmod>2026-11-01T23:19:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simplifying-geometric-figures-using-exponent-rules/sssssmz8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplifying-geometric-figures-using-exponent-rules/sssssmz8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplifying-geometric-figures-using-exponent-rules/sssssmz8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplifying-geometric-figures-using-exponent-rules/sssssmz8"/>
      <lastmod>2026-11-02T00:12:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simplifying-geometric-figures-using-exponent-rules/sssssmz8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplifying-geometric-figures-using-exponent-rules/sssssmz8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplifying-geometric-figures-using-exponent-rules/sssssmz8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplifying-geometric-figures-using-exponent-rules/sssssmz8"/>
      <lastmod>2026-11-02T00:12:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/canonical-representation-and-polar-form-of-complex-numbers/sssssmzu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/canonical-representation-and-polar-form-of-complex-numbers/sssssmzu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/canonical-representation-and-polar-form-of-complex-numbers/sssssmzu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/canonical-representation-and-polar-form-of-complex-numbers/sssssmzu"/>
      <lastmod>2026-11-01T23:11:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/canonical-representation-and-polar-form-of-complex-numbers/sssssmzu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/canonical-representation-and-polar-form-of-complex-numbers/sssssmzu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/canonical-representation-and-polar-form-of-complex-numbers/sssssmzu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/canonical-representation-and-polar-form-of-complex-numbers/sssssmzu"/>
      <lastmod>2026-11-01T23:11:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/broken-calculator-simple-but-not-simple/sssssmz5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/broken-calculator-simple-but-not-simple/sssssmz5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/broken-calculator-simple-but-not-simple/sssssmz5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/broken-calculator-simple-but-not-simple/sssssmz5"/>
      <lastmod>2026-11-01T21:19:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/broken-calculator-simple-but-not-simple/sssssmz5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/broken-calculator-simple-but-not-simple/sssssmz5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/broken-calculator-simple-but-not-simple/sssssmz5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/broken-calculator-simple-but-not-simple/sssssmz5"/>
      <lastmod>2026-11-01T21:19:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-practice-advanced/sssssmzb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-practice-advanced/sssssmzb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-practice-advanced/sssssmzb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-practice-advanced/sssssmzb"/>
      <lastmod>2026-11-02T18:52:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-practice-advanced/sssssmzb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-practice-advanced/sssssmzb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-practice-advanced/sssssmzb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-practice-advanced/sssssmzb"/>
      <lastmod>2026-11-02T18:52:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/variable-cube/sssssmz3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-cube/sssssmz3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-cube/sssssmz3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-cube/sssssmz3"/>
      <lastmod>2026-11-02T09:44:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/variable-cube/sssssmz3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-cube/sssssmz3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-cube/sssssmz3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-cube/sssssmz3"/>
      <lastmod>2026-11-02T09:44:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-in-3d-and-real-world-applications/sssssmzq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-in-3d-and-real-world-applications/sssssmzq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-in-3d-and-real-world-applications/sssssmzq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-in-3d-and-real-world-applications/sssssmzq"/>
      <lastmod>2026-11-01T20:49:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-in-3d-and-real-world-applications/sssssmzq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-in-3d-and-real-world-applications/sssssmzq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-in-3d-and-real-world-applications/sssssmzq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-in-3d-and-real-world-applications/sssssmzq"/>
      <lastmod>2026-11-01T20:49:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-v2/sssssmz1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-v2/sssssmz1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-v2/sssssmz1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-v2/sssssmz1"/>
      <lastmod>2026-11-02T18:14:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-v2/sssssmz1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-v2/sssssmz1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-v2/sssssmz1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-v2/sssssmz1"/>
      <lastmod>2026-11-02T18:14:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directional-derivatives-demo/sssssmzm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivatives-demo/sssssmzm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivatives-demo/sssssmzm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivatives-demo/sssssmzm"/>
      <lastmod>2026-11-01T19:19:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directional-derivatives-demo/sssssmzm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivatives-demo/sssssmzm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivatives-demo/sssssmzm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivatives-demo/sssssmzm"/>
      <lastmod>2026-11-01T19:19:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-rotations-visualization/sssssmzj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-rotations-visualization/sssssmzj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-rotations-visualization/sssssmzj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-rotations-visualization/sssssmzj"/>
      <lastmod>2026-11-02T18:50:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-rotations-visualization/sssssmzj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-rotations-visualization/sssssmzj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-rotations-visualization/sssssmzj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-rotations-visualization/sssssmzj"/>
      <lastmod>2026-11-02T18:50:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-of-pythagorean-triples-with-even-side-a/sssssmzp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-pythagorean-triples-with-even-side-a/sssssmzp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-pythagorean-triples-with-even-side-a/sssssmzp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-pythagorean-triples-with-even-side-a/sssssmzp"/>
      <lastmod>2026-11-01T21:57:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-of-pythagorean-triples-with-even-side-a/sssssmzp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-pythagorean-triples-with-even-side-a/sssssmzp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-pythagorean-triples-with-even-side-a/sssssmzp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-pythagorean-triples-with-even-side-a/sssssmzp"/>
      <lastmod>2026-11-01T21:57:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-by-william-richards/sssssmzw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-by-william-richards/sssssmzw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-isosceles-triangles-by-william-richards/sssssmzw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-by-william-richards/sssssmzw"/>
      <lastmod>2026-11-02T09:07:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-isosceles-triangles-by-william-richards/sssssmzw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-by-william-richards/sssssmzw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-isosceles-triangles-by-william-richards/sssssmzw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-by-william-richards/sssssmzw"/>
      <lastmod>2026-11-02T09:07:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pattern-blocks-demo/sssssmz6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pattern-blocks-demo/sssssmz6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pattern-blocks-demo/sssssmz6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pattern-blocks-demo/sssssmz6"/>
      <lastmod>2026-11-02T17:10:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pattern-blocks-demo/sssssmz6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pattern-blocks-demo/sssssmz6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pattern-blocks-demo/sssssmz6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pattern-blocks-demo/sssssmz6"/>
      <lastmod>2026-11-02T17:10:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-artist-dynamic-mirror-geometry-with-tangents-and-intersections/sssssmzg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-artist-dynamic-mirror-geometry-with-tangents-and-intersections/sssssmzg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-artist-dynamic-mirror-geometry-with-tangents-and-intersections/sssssmzg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-artist-dynamic-mirror-geometry-with-tangents-and-intersections/sssssmzg"/>
      <lastmod>2026-11-02T02:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-artist-dynamic-mirror-geometry-with-tangents-and-intersections/sssssmzg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-artist-dynamic-mirror-geometry-with-tangents-and-intersections/sssssmzg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-artist-dynamic-mirror-geometry-with-tangents-and-intersections/sssssmzg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-artist-dynamic-mirror-geometry-with-tangents-and-intersections/sssssmzg"/>
      <lastmod>2026-11-02T02:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2019-solidarity-challenge-a-comprehensive-exploration-of-geometry-functions-a/sssssmz9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2019-solidarity-challenge-a-comprehensive-exploration-of-geometry-functions-a/sssssmz9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2019-solidarity-challenge-a-comprehensive-exploration-of-geometry-functions-a/sssssmz9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2019-solidarity-challenge-a-comprehensive-exploration-of-geometry-functions-a/sssssmz9"/>
      <lastmod>2026-11-01T21:56:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2019-solidarity-challenge-a-comprehensive-exploration-of-geometry-functions-a/sssssmz9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2019-solidarity-challenge-a-comprehensive-exploration-of-geometry-functions-a/sssssmz9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2019-solidarity-challenge-a-comprehensive-exploration-of-geometry-functions-a/sssssmz9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2019-solidarity-challenge-a-comprehensive-exploration-of-geometry-functions-a/sssssmz9"/>
      <lastmod>2026-11-01T21:56:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connectivity-table-for-a-3d-pyramid-and-geometric-construction/sssssmze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-table-for-a-3d-pyramid-and-geometric-construction/sssssmze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-table-for-a-3d-pyramid-and-geometric-construction/sssssmze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-table-for-a-3d-pyramid-and-geometric-construction/sssssmze"/>
      <lastmod>2026-11-02T18:41:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connectivity-table-for-a-3d-pyramid-and-geometric-construction/sssssmze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-table-for-a-3d-pyramid-and-geometric-construction/sssssmze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-table-for-a-3d-pyramid-and-geometric-construction/sssssmze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-table-for-a-3d-pyramid-and-geometric-construction/sssssmze"/>
      <lastmod>2026-11-02T18:41:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-logarithmic-functions-by-g-lseminturan/sssssmzv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-logarithmic-functions-by-g-lseminturan/sssssmzv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-logarithmic-functions-by-g-lseminturan/sssssmzv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-logarithmic-functions-by-g-lseminturan/sssssmzv"/>
      <lastmod>2026-11-02T15:54:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-logarithmic-functions-by-g-lseminturan/sssssmzv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-logarithmic-functions-by-g-lseminturan/sssssmzv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-logarithmic-functions-by-g-lseminturan/sssssmzv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-logarithmic-functions-by-g-lseminturan/sssssmzv"/>
      <lastmod>2026-11-02T15:54:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/are-they-congruent/sssssmz4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/are-they-congruent/sssssmz4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/are-they-congruent/sssssmz4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/are-they-congruent/sssssmz4"/>
      <lastmod>2026-11-02T13:47:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/are-they-congruent/sssssmz4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/are-they-congruent/sssssmz4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/are-they-congruent/sssssmz4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/are-they-congruent/sssssmz4"/>
      <lastmod>2026-11-02T13:47:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/center-angle-inscribed-angle-circular-segment-angle-and-capable-arc/sssssmzl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-angle-inscribed-angle-circular-segment-angle-and-capable-arc/sssssmzl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-angle-inscribed-angle-circular-segment-angle-and-capable-arc/sssssmzl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-angle-inscribed-angle-circular-segment-angle-and-capable-arc/sssssmzl"/>
      <lastmod>2026-11-02T02:27:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/center-angle-inscribed-angle-circular-segment-angle-and-capable-arc/sssssmzl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-angle-inscribed-angle-circular-segment-angle-and-capable-arc/sssssmzl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-angle-inscribed-angle-circular-segment-angle-and-capable-arc/sssssmzl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-angle-inscribed-angle-circular-segment-angle-and-capable-arc/sssssmzl"/>
      <lastmod>2026-11-02T02:27:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-coordinates-by-arwa/sssssmzy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-arwa/sssssmzy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-by-arwa/sssssmzy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-arwa/sssssmzy"/>
      <lastmod>2026-11-01T19:11:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-coordinates-by-arwa/sssssmzy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-arwa/sssssmzy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-by-arwa/sssssmzy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-arwa/sssssmzy"/>
      <lastmod>2026-11-01T19:11:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-pyramid-by-csiu822/sssssmza</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-pyramid-by-csiu822/sssssmza"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-pyramid-by-csiu822/sssssmza"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-pyramid-by-csiu822/sssssmza"/>
      <lastmod>2026-11-02T02:27:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-pyramid-by-csiu822/sssssmza</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-pyramid-by-csiu822/sssssmza"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-pyramid-by-csiu822/sssssmza"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-pyramid-by-csiu822/sssssmza"/>
      <lastmod>2026-11-02T02:27:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arc-length-and-area-of-a-sector-dynamic-modifiable-template/sssssmzc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-and-area-of-a-sector-dynamic-modifiable-template/sssssmzc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-and-area-of-a-sector-dynamic-modifiable-template/sssssmzc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-and-area-of-a-sector-dynamic-modifiable-template/sssssmzc"/>
      <lastmod>2026-11-02T16:44:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arc-length-and-area-of-a-sector-dynamic-modifiable-template/sssssmzc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-and-area-of-a-sector-dynamic-modifiable-template/sssssmzc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-and-area-of-a-sector-dynamic-modifiable-template/sssssmzc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-and-area-of-a-sector-dynamic-modifiable-template/sssssmzc"/>
      <lastmod>2026-11-02T16:44:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubes-illusion-iii/sssssmzr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubes-illusion-iii/sssssmzr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubes-illusion-iii/sssssmzr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubes-illusion-iii/sssssmzr"/>
      <lastmod>2026-11-02T18:30:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubes-illusion-iii/sssssmzr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubes-illusion-iii/sssssmzr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubes-illusion-iii/sssssmzr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubes-illusion-iii/sssssmzr"/>
      <lastmod>2026-11-02T18:30:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-and-sphere-with-equal-surface-area/sssssmzh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-sphere-with-equal-surface-area/sssssmzh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-sphere-with-equal-surface-area/sssssmzh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-sphere-with-equal-surface-area/sssssmzh"/>
      <lastmod>2026-11-01T22:01:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-and-sphere-with-equal-surface-area/sssssmzh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-sphere-with-equal-surface-area/sssssmzh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-sphere-with-equal-surface-area/sssssmzh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-sphere-with-equal-surface-area/sssssmzh"/>
      <lastmod>2026-11-01T22:01:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-parallelograms-investigation/sssssmzt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-parallelograms-investigation/sssssmzt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-parallelograms-investigation/sssssmzt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-parallelograms-investigation/sssssmzt"/>
      <lastmod>2026-11-01T23:46:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-parallelograms-investigation/sssssmzt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-parallelograms-investigation/sssssmzt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-parallelograms-investigation/sssssmzt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-parallelograms-investigation/sssssmzt"/>
      <lastmod>2026-11-01T23:46:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/10-1-gg-intersections-lesson/sssssmzx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/10-1-gg-intersections-lesson/sssssmzx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/10-1-gg-intersections-lesson/sssssmzx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/10-1-gg-intersections-lesson/sssssmzx"/>
      <lastmod>2026-11-02T08:30:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/10-1-gg-intersections-lesson/sssssmzx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/10-1-gg-intersections-lesson/sssssmzx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/10-1-gg-intersections-lesson/sssssmzx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/10-1-gg-intersections-lesson/sssssmzx"/>
      <lastmod>2026-11-02T08:30:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-graphs-and-limit-theorem-demo/sssssmzi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphs-and-limit-theorem-demo/sssssmzi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphs-and-limit-theorem-demo/sssssmzi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphs-and-limit-theorem-demo/sssssmzi"/>
      <lastmod>2026-11-02T00:17:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-graphs-and-limit-theorem-demo/sssssmzi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphs-and-limit-theorem-demo/sssssmzi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphs-and-limit-theorem-demo/sssssmzi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphs-and-limit-theorem-demo/sssssmzi"/>
      <lastmod>2026-11-02T00:17:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/free-body-diagram-of-an-object-standing-on-the-floor/sssssmzo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/free-body-diagram-of-an-object-standing-on-the-floor/sssssmzo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/free-body-diagram-of-an-object-standing-on-the-floor/sssssmzo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/free-body-diagram-of-an-object-standing-on-the-floor/sssssmzo"/>
      <lastmod>2026-11-02T13:15:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/free-body-diagram-of-an-object-standing-on-the-floor/sssssmzo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/free-body-diagram-of-an-object-standing-on-the-floor/sssssmzo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/free-body-diagram-of-an-object-standing-on-the-floor/sssssmzo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/free-body-diagram-of-an-object-standing-on-the-floor/sssssmzo"/>
      <lastmod>2026-11-02T13:15:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-lines-from-points-and-vectors/sssssm0s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-lines-from-points-and-vectors/sssssm0s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-lines-from-points-and-vectors/sssssm0s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-lines-from-points-and-vectors/sssssm0s"/>
      <lastmod>2026-11-02T18:36:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-lines-from-points-and-vectors/sssssm0s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-lines-from-points-and-vectors/sssssm0s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-lines-from-points-and-vectors/sssssm0s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-lines-from-points-and-vectors/sssssm0s"/>
      <lastmod>2026-11-02T18:36:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-two-cones-demo/sssssm07</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-cones-demo/sssssm07"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-cones-demo/sssssm07"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-cones-demo/sssssm07"/>
      <lastmod>2026-11-02T16:34:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-two-cones-demo/sssssm07</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-cones-demo/sssssm07"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-cones-demo/sssssm07"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-cones-demo/sssssm07"/>
      <lastmod>2026-11-02T16:34:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perfect-square-visualization/sssssm0n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perfect-square-visualization/sssssm0n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perfect-square-visualization/sssssm0n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perfect-square-visualization/sssssm0n"/>
      <lastmod>2026-11-02T17:40:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perfect-square-visualization/sssssm0n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perfect-square-visualization/sssssm0n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perfect-square-visualization/sssssm0n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perfect-square-visualization/sssssm0n"/>
      <lastmod>2026-11-02T17:40:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/duchamp-s-circles/sssssm02</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/duchamp-s-circles/sssssm02"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/duchamp-s-circles/sssssm02"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/duchamp-s-circles/sssssm02"/>
      <lastmod>2026-11-02T17:59:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/duchamp-s-circles/sssssm02</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/duchamp-s-circles/sssssm02"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/duchamp-s-circles/sssssm02"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/duchamp-s-circles/sssssm02"/>
      <lastmod>2026-11-02T17:59:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locating-fractions-on-a-number-line-by-edc-interactive-math/sssssm0k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-fractions-on-a-number-line-by-edc-interactive-math/sssssm0k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-fractions-on-a-number-line-by-edc-interactive-math/sssssm0k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-fractions-on-a-number-line-by-edc-interactive-math/sssssm0k"/>
      <lastmod>2026-11-02T00:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locating-fractions-on-a-number-line-by-edc-interactive-math/sssssm0k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-fractions-on-a-number-line-by-edc-interactive-math/sssssm0k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-fractions-on-a-number-line-by-edc-interactive-math/sssssm0k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-fractions-on-a-number-line-by-edc-interactive-math/sssssm0k"/>
      <lastmod>2026-11-02T00:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visual-computation-of-geometric-series/sssssm0z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-computation-of-geometric-series/sssssm0z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-computation-of-geometric-series/sssssm0z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-computation-of-geometric-series/sssssm0z"/>
      <lastmod>2026-11-01T23:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visual-computation-of-geometric-series/sssssm0z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-computation-of-geometric-series/sssssm0z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-computation-of-geometric-series/sssssm0z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-computation-of-geometric-series/sssssm0z"/>
      <lastmod>2026-11-01T23:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/facebook-logo/sssssm00</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/facebook-logo/sssssm00"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/facebook-logo/sssssm00"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/facebook-logo/sssssm00"/>
      <lastmod>2026-11-01T23:13:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/facebook-logo/sssssm00</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/facebook-logo/sssssm00"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/facebook-logo/sssssm00"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/facebook-logo/sssssm00"/>
      <lastmod>2026-11-01T23:13:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-by-crdo/sssssm0d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-crdo/sssssm0d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-crdo/sssssm0d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-crdo/sssssm0d"/>
      <lastmod>2026-11-01T22:06:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-by-crdo/sssssm0d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-crdo/sssssm0d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-crdo/sssssm0d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-crdo/sssssm0d"/>
      <lastmod>2026-11-01T22:06:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wrap-a-function-on-the-sphere/sssssm0f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wrap-a-function-on-the-sphere/sssssm0f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wrap-a-function-on-the-sphere/sssssm0f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wrap-a-function-on-the-sphere/sssssm0f"/>
      <lastmod>2026-11-01T19:14:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wrap-a-function-on-the-sphere/sssssm0f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wrap-a-function-on-the-sphere/sssssm0f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wrap-a-function-on-the-sphere/sssssm0f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wrap-a-function-on-the-sphere/sssssm0f"/>
      <lastmod>2026-11-01T19:14:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-of-points-of-intersection-of-two-straight-lines/sssssm08</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-points-of-intersection-of-two-straight-lines/sssssm08"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-points-of-intersection-of-two-straight-lines/sssssm08"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-points-of-intersection-of-two-straight-lines/sssssm08"/>
      <lastmod>2026-11-02T16:58:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-of-points-of-intersection-of-two-straight-lines/sssssm08</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-points-of-intersection-of-two-straight-lines/sssssm08"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-points-of-intersection-of-two-straight-lines/sssssm08"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-points-of-intersection-of-two-straight-lines/sssssm08"/>
      <lastmod>2026-11-02T16:58:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equiangular-spiral-voronoi-and-delaunay-patterns/sssssm0u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equiangular-spiral-voronoi-and-delaunay-patterns/sssssm0u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equiangular-spiral-voronoi-and-delaunay-patterns/sssssm0u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equiangular-spiral-voronoi-and-delaunay-patterns/sssssm0u"/>
      <lastmod>2026-11-02T00:40:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equiangular-spiral-voronoi-and-delaunay-patterns/sssssm0u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equiangular-spiral-voronoi-and-delaunay-patterns/sssssm0u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equiangular-spiral-voronoi-and-delaunay-patterns/sssssm0u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equiangular-spiral-voronoi-and-delaunay-patterns/sssssm0u"/>
      <lastmod>2026-11-02T00:40:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sinusoidal-transformations-sine-and-cosine/sssssm05</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sinusoidal-transformations-sine-and-cosine/sssssm05"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sinusoidal-transformations-sine-and-cosine/sssssm05"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sinusoidal-transformations-sine-and-cosine/sssssm05"/>
      <lastmod>2026-11-02T14:53:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sinusoidal-transformations-sine-and-cosine/sssssm05</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sinusoidal-transformations-sine-and-cosine/sssssm05"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sinusoidal-transformations-sine-and-cosine/sssssm05"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sinusoidal-transformations-sine-and-cosine/sssssm05"/>
      <lastmod>2026-11-02T14:53:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equation-of-a-line-through-given-points/sssssm0b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-a-line-through-given-points/sssssm0b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-a-line-through-given-points/sssssm0b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-a-line-through-given-points/sssssm0b"/>
      <lastmod>2026-11-01T23:47:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equation-of-a-line-through-given-points/sssssm0b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-a-line-through-given-points/sssssm0b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-a-line-through-given-points/sssssm0b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-a-line-through-given-points/sssssm0b"/>
      <lastmod>2026-11-01T23:47:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-straight-lines/sssssm03</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-straight-lines/sssssm03"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-straight-lines/sssssm03"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-straight-lines/sssssm03"/>
      <lastmod>2026-11-02T16:50:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-straight-lines/sssssm03</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-straight-lines/sssssm03"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-straight-lines/sssssm03"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-straight-lines/sssssm03"/>
      <lastmod>2026-11-02T16:50:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/field-lines-in-implicit-curves/sssssm0q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/field-lines-in-implicit-curves/sssssm0q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/field-lines-in-implicit-curves/sssssm0q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/field-lines-in-implicit-curves/sssssm0q"/>
      <lastmod>2026-11-01T19:28:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/field-lines-in-implicit-curves/sssssm0q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/field-lines-in-implicit-curves/sssssm0q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/field-lines-in-implicit-curves/sssssm0q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/field-lines-in-implicit-curves/sssssm0q"/>
      <lastmod>2026-11-01T19:28:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-practice/sssssm01</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-practice/sssssm01"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-practice/sssssm01"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-practice/sssssm01"/>
      <lastmod>2026-11-01T23:34:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-practice/sssssm01</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-practice/sssssm01"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-practice/sssssm01"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-practice/sssssm01"/>
      <lastmod>2026-11-01T23:34:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/corresponding-angles-theorem-parallel-lines-transversal/sssssm0m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corresponding-angles-theorem-parallel-lines-transversal/sssssm0m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corresponding-angles-theorem-parallel-lines-transversal/sssssm0m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corresponding-angles-theorem-parallel-lines-transversal/sssssm0m"/>
      <lastmod>2026-11-02T18:16:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/corresponding-angles-theorem-parallel-lines-transversal/sssssm0m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corresponding-angles-theorem-parallel-lines-transversal/sssssm0m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corresponding-angles-theorem-parallel-lines-transversal/sssssm0m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corresponding-angles-theorem-parallel-lines-transversal/sssssm0m"/>
      <lastmod>2026-11-02T18:16:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-reflection-puzzle-by-david-wees/sssssm0j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-reflection-puzzle-by-david-wees/sssssm0j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-reflection-puzzle-by-david-wees/sssssm0j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-reflection-puzzle-by-david-wees/sssssm0j"/>
      <lastmod>2026-11-01T23:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-reflection-puzzle-by-david-wees/sssssm0j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-reflection-puzzle-by-david-wees/sssssm0j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-reflection-puzzle-by-david-wees/sssssm0j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-reflection-puzzle-by-david-wees/sssssm0j"/>
      <lastmod>2026-11-01T23:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/co-interior-angles-demo/sssssm0p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/co-interior-angles-demo/sssssm0p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/co-interior-angles-demo/sssssm0p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/co-interior-angles-demo/sssssm0p"/>
      <lastmod>2026-11-01T20:51:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/co-interior-angles-demo/sssssm0p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/co-interior-angles-demo/sssssm0p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/co-interior-angles-demo/sssssm0p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/co-interior-angles-demo/sssssm0p"/>
      <lastmod>2026-11-01T20:51:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/measuring-angles-exercise-4/sssssm0w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-angles-exercise-4/sssssm0w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-angles-exercise-4/sssssm0w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-angles-exercise-4/sssssm0w"/>
      <lastmod>2026-11-02T16:37:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/measuring-angles-exercise-4/sssssm0w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-angles-exercise-4/sssssm0w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-angles-exercise-4/sssssm0w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-angles-exercise-4/sssssm0w"/>
      <lastmod>2026-11-02T16:37:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/powers-of-powers-of-10/sssssm06</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/powers-of-powers-of-10/sssssm06"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/powers-of-powers-of-10/sssssm06"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/powers-of-powers-of-10/sssssm06"/>
      <lastmod>2026-11-02T10:36:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/powers-of-powers-of-10/sssssm06</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/powers-of-powers-of-10/sssssm06"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/powers-of-powers-of-10/sssssm06"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/powers-of-powers-of-10/sssssm06"/>
      <lastmod>2026-11-02T10:36:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-of-y-a-x/sssssm0g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-y-a-x/sssssm0g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-y-a-x/sssssm0g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-y-a-x/sssssm0g"/>
      <lastmod>2026-11-02T18:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-of-y-a-x/sssssm0g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-y-a-x/sssssm0g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-y-a-x/sssssm0g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-y-a-x/sssssm0g"/>
      <lastmod>2026-11-02T18:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-subtraction-demo/sssssm09</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-demo/sssssm09"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-demo/sssssm09"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-demo/sssssm09"/>
      <lastmod>2026-11-01T21:21:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-subtraction-demo/sssssm09</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-demo/sssssm09"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-demo/sssssm09"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-demo/sssssm09"/>
      <lastmod>2026-11-01T21:21:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-multiplying-by-powers-of-10/sssssm0e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-multiplying-by-powers-of-10/sssssm0e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-multiplying-by-powers-of-10/sssssm0e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-multiplying-by-powers-of-10/sssssm0e"/>
      <lastmod>2026-11-01T19:27:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-multiplying-by-powers-of-10/sssssm0e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-multiplying-by-powers-of-10/sssssm0e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-multiplying-by-powers-of-10/sssssm0e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-multiplying-by-powers-of-10/sssssm0e"/>
      <lastmod>2026-11-01T19:27:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solid-with-regular-hexagonal-base-cross-sections-parallel-to-yaxis-are-also-reg/sssssm0v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solid-with-regular-hexagonal-base-cross-sections-parallel-to-yaxis-are-also-reg/sssssm0v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solid-with-regular-hexagonal-base-cross-sections-parallel-to-yaxis-are-also-reg/sssssm0v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solid-with-regular-hexagonal-base-cross-sections-parallel-to-yaxis-are-also-reg/sssssm0v"/>
      <lastmod>2026-11-01T20:57:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solid-with-regular-hexagonal-base-cross-sections-parallel-to-yaxis-are-also-reg/sssssm0v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solid-with-regular-hexagonal-base-cross-sections-parallel-to-yaxis-are-also-reg/sssssm0v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solid-with-regular-hexagonal-base-cross-sections-parallel-to-yaxis-are-also-reg/sssssm0v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solid-with-regular-hexagonal-base-cross-sections-parallel-to-yaxis-are-also-reg/sssssm0v"/>
      <lastmod>2026-11-01T20:57:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-mean-construction/sssssm04</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-construction/sssssm04"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-construction/sssssm04"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-construction/sssssm04"/>
      <lastmod>2026-11-02T08:30:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-mean-construction/sssssm04</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-construction/sssssm04"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-construction/sssssm04"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-construction/sssssm04"/>
      <lastmod>2026-11-02T08:30:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploration-sine-vs-cosine-in-a-right-triangle/sssssm0l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-sine-vs-cosine-in-a-right-triangle/sssssm0l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-sine-vs-cosine-in-a-right-triangle/sssssm0l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-sine-vs-cosine-in-a-right-triangle/sssssm0l"/>
      <lastmod>2026-11-01T22:05:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploration-sine-vs-cosine-in-a-right-triangle/sssssm0l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-sine-vs-cosine-in-a-right-triangle/sssssm0l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-sine-vs-cosine-in-a-right-triangle/sssssm0l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-sine-vs-cosine-in-a-right-triangle/sssssm0l"/>
      <lastmod>2026-11-01T22:05:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-the-definite-integral-cis-pdi-interactive-demo/sssssm0y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-the-definite-integral-cis-pdi-interactive-demo/sssssm0y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-the-definite-integral-cis-pdi-interactive-demo/sssssm0y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-the-definite-integral-cis-pdi-interactive-demo/sssssm0y"/>
      <lastmod>2026-11-02T00:47:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-the-definite-integral-cis-pdi-interactive-demo/sssssm0y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-the-definite-integral-cis-pdi-interactive-demo/sssssm0y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-the-definite-integral-cis-pdi-interactive-demo/sssssm0y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-the-definite-integral-cis-pdi-interactive-demo/sssssm0y"/>
      <lastmod>2026-11-02T00:47:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubic-surface-with-normal-line-and-tangent-plane/sssssm0a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-surface-with-normal-line-and-tangent-plane/sssssm0a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-surface-with-normal-line-and-tangent-plane/sssssm0a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-surface-with-normal-line-and-tangent-plane/sssssm0a"/>
      <lastmod>2026-11-02T18:33:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubic-surface-with-normal-line-and-tangent-plane/sssssm0a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-surface-with-normal-line-and-tangent-plane/sssssm0a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-surface-with-normal-line-and-tangent-plane/sssssm0a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-surface-with-normal-line-and-tangent-plane/sssssm0a"/>
      <lastmod>2026-11-02T18:33:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/asa-congruence-demonstration-by-bernard-smith/sssssm0c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-congruence-demonstration-by-bernard-smith/sssssm0c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-congruence-demonstration-by-bernard-smith/sssssm0c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-congruence-demonstration-by-bernard-smith/sssssm0c"/>
      <lastmod>2026-11-02T16:33:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/asa-congruence-demonstration-by-bernard-smith/sssssm0c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-congruence-demonstration-by-bernard-smith/sssssm0c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-congruence-demonstration-by-bernard-smith/sssssm0c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-congruence-demonstration-by-bernard-smith/sssssm0c"/>
      <lastmod>2026-11-02T16:33:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wallace-simson-line-construction-on-a-sphere/sssssm0r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallace-simson-line-construction-on-a-sphere/sssssm0r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallace-simson-line-construction-on-a-sphere/sssssm0r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallace-simson-line-construction-on-a-sphere/sssssm0r"/>
      <lastmod>2026-11-02T18:37:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wallace-simson-line-construction-on-a-sphere/sssssm0r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallace-simson-line-construction-on-a-sphere/sssssm0r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallace-simson-line-construction-on-a-sphere/sssssm0r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallace-simson-line-construction-on-a-sphere/sssssm0r"/>
      <lastmod>2026-11-02T18:37:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nature-of-roots-of-quadratic-equation/sssssm0h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nature-of-roots-of-quadratic-equation/sssssm0h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nature-of-roots-of-quadratic-equation/sssssm0h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nature-of-roots-of-quadratic-equation/sssssm0h"/>
      <lastmod>2026-11-01T20:40:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nature-of-roots-of-quadratic-equation/sssssm0h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nature-of-roots-of-quadratic-equation/sssssm0h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nature-of-roots-of-quadratic-equation/sssssm0h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nature-of-roots-of-quadratic-equation/sssssm0h"/>
      <lastmod>2026-11-01T20:40:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fourth-quadrant/sssssm0t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fourth-quadrant/sssssm0t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fourth-quadrant/sssssm0t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fourth-quadrant/sssssm0t"/>
      <lastmod>2026-11-02T18:59:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fourth-quadrant/sssssm0t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fourth-quadrant/sssssm0t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fourth-quadrant/sssssm0t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fourth-quadrant/sssssm0t"/>
      <lastmod>2026-11-02T18:59:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagoras-theorem/sssssm0x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-theorem/sssssm0x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-theorem/sssssm0x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-theorem/sssssm0x"/>
      <lastmod>2026-11-02T18:34:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagoras-theorem/sssssm0x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-theorem/sssssm0x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-theorem/sssssm0x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-theorem/sssssm0x"/>
      <lastmod>2026-11-02T18:34:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-tools-view-tutorial/sssssm0i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-tools-view-tutorial/sssssm0i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-tools-view-tutorial/sssssm0i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-tools-view-tutorial/sssssm0i"/>
      <lastmod>2026-11-01T22:07:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-tools-view-tutorial/sssssm0i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-tools-view-tutorial/sssssm0i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-tools-view-tutorial/sssssm0i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-tools-view-tutorial/sssssm0i"/>
      <lastmod>2026-11-01T22:07:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-progression-exercise/sssssm0o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-progression-exercise/sssssm0o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-progression-exercise/sssssm0o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-progression-exercise/sssssm0o"/>
      <lastmod>2026-11-02T18:34:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-progression-exercise/sssssm0o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-progression-exercise/sssssm0o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-progression-exercise/sssssm0o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-progression-exercise/sssssm0o"/>
      <lastmod>2026-11-02T18:34:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-increase-per-1-unit-change-in-l-or-w/sssssmds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-increase-per-1-unit-change-in-l-or-w/sssssmds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-increase-per-1-unit-change-in-l-or-w/sssssmds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-increase-per-1-unit-change-in-l-or-w/sssssmds"/>
      <lastmod>2026-11-02T17:03:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-increase-per-1-unit-change-in-l-or-w/sssssmds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-increase-per-1-unit-change-in-l-or-w/sssssmds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-increase-per-1-unit-change-in-l-or-w/sssssmds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-increase-per-1-unit-change-in-l-or-w/sssssmds"/>
      <lastmod>2026-11-02T17:03:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connectivity-matrix-visualizing-vertex-links-in-a-tetrahedron/sssssmd7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-matrix-visualizing-vertex-links-in-a-tetrahedron/sssssmd7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-matrix-visualizing-vertex-links-in-a-tetrahedron/sssssmd7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-matrix-visualizing-vertex-links-in-a-tetrahedron/sssssmd7"/>
      <lastmod>2026-11-02T18:45:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connectivity-matrix-visualizing-vertex-links-in-a-tetrahedron/sssssmd7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-matrix-visualizing-vertex-links-in-a-tetrahedron/sssssmd7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-matrix-visualizing-vertex-links-in-a-tetrahedron/sssssmd7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-matrix-visualizing-vertex-links-in-a-tetrahedron/sssssmd7"/>
      <lastmod>2026-11-02T18:45:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/related-rates-adjustable-cone/sssssmdn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/related-rates-adjustable-cone/sssssmdn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/related-rates-adjustable-cone/sssssmdn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/related-rates-adjustable-cone/sssssmdn"/>
      <lastmod>2026-11-02T15:44:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/related-rates-adjustable-cone/sssssmdn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/related-rates-adjustable-cone/sssssmdn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/related-rates-adjustable-cone/sssssmdn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/related-rates-adjustable-cone/sssssmdn"/>
      <lastmod>2026-11-02T15:44:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/harmonic-addition-2/sssssmd2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harmonic-addition-2/sssssmd2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harmonic-addition-2/sssssmd2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harmonic-addition-2/sssssmd2"/>
      <lastmod>2026-11-02T16:50:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/harmonic-addition-2/sssssmd2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harmonic-addition-2/sssssmd2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harmonic-addition-2/sssssmd2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harmonic-addition-2/sssssmd2"/>
      <lastmod>2026-11-02T16:50:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/archimedes-proposal-dynamic-construction-of-circumcircle-and-median-segments/sssssmdk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/archimedes-proposal-dynamic-construction-of-circumcircle-and-median-segments/sssssmdk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/archimedes-proposal-dynamic-construction-of-circumcircle-and-median-segments/sssssmdk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/archimedes-proposal-dynamic-construction-of-circumcircle-and-median-segments/sssssmdk"/>
      <lastmod>2026-11-01T21:38:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/archimedes-proposal-dynamic-construction-of-circumcircle-and-median-segments/sssssmdk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/archimedes-proposal-dynamic-construction-of-circumcircle-and-median-segments/sssssmdk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/archimedes-proposal-dynamic-construction-of-circumcircle-and-median-segments/sssssmdk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/archimedes-proposal-dynamic-construction-of-circumcircle-and-median-segments/sssssmdk"/>
      <lastmod>2026-11-01T21:38:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagonal-prism-net-by-melissahertel/sssssmdz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-prism-net-by-melissahertel/sssssmdz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-prism-net-by-melissahertel/sssssmdz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-prism-net-by-melissahertel/sssssmdz"/>
      <lastmod>2026-11-01T19:01:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagonal-prism-net-by-melissahertel/sssssmdz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-prism-net-by-melissahertel/sssssmdz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-prism-net-by-melissahertel/sssssmdz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-prism-net-by-melissahertel/sssssmdz"/>
      <lastmod>2026-11-01T19:01:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-addition-postulate/sssssmd0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate/sssssmd0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate/sssssmd0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate/sssssmd0"/>
      <lastmod>2026-11-01T21:27:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/segment-addition-postulate/sssssmd0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate/sssssmd0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate/sssssmd0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate/sssssmd0"/>
      <lastmod>2026-11-01T21:27:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/heptagon-angle-sum-theorems/sssssmdd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heptagon-angle-sum-theorems/sssssmdd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heptagon-angle-sum-theorems/sssssmdd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heptagon-angle-sum-theorems/sssssmdd"/>
      <lastmod>2026-11-01T23:52:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/heptagon-angle-sum-theorems/sssssmdd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heptagon-angle-sum-theorems/sssssmdd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heptagon-angle-sum-theorems/sssssmdd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heptagon-angle-sum-theorems/sssssmdd"/>
      <lastmod>2026-11-01T23:52:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-square/sssssmdf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-square/sssssmdf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-proof-square/sssssmdf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-square/sssssmdf"/>
      <lastmod>2026-11-01T23:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-proof-square/sssssmdf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-square/sssssmdf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-proof-square/sssssmdf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-square/sssssmdf"/>
      <lastmod>2026-11-01T23:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/defining-a-translation/sssssmd8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-a-translation/sssssmd8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-a-translation/sssssmd8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-a-translation/sssssmd8"/>
      <lastmod>2026-11-01T21:20:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/defining-a-translation/sssssmd8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-a-translation/sssssmd8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-a-translation/sssssmd8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-a-translation/sssssmd8"/>
      <lastmod>2026-11-01T21:20:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temari-ball-construction/sssssmdu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temari-ball-construction/sssssmdu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temari-ball-construction/sssssmdu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temari-ball-construction/sssssmdu"/>
      <lastmod>2026-11-01T21:24:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temari-ball-construction/sssssmdu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temari-ball-construction/sssssmdu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temari-ball-construction/sssssmdu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temari-ball-construction/sssssmdu"/>
      <lastmod>2026-11-01T21:24:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hcf-and-lcm-of-larger-integers/sssssmd5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hcf-and-lcm-of-larger-integers/sssssmd5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hcf-and-lcm-of-larger-integers/sssssmd5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hcf-and-lcm-of-larger-integers/sssssmd5"/>
      <lastmod>2026-11-02T16:43:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hcf-and-lcm-of-larger-integers/sssssmd5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hcf-and-lcm-of-larger-integers/sssssmd5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hcf-and-lcm-of-larger-integers/sssssmd5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hcf-and-lcm-of-larger-integers/sssssmd5"/>
      <lastmod>2026-11-02T16:43:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponents-addition-law/sssssmdb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-addition-law/sssssmdb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-addition-law/sssssmdb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-addition-law/sssssmdb"/>
      <lastmod>2026-11-02T18:14:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponents-addition-law/sssssmdb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-addition-law/sssssmdb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-addition-law/sssssmdb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-addition-law/sssssmdb"/>
      <lastmod>2026-11-02T18:14:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-lines-construction-and-mirror-transformation/sssssmd3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-construction-and-mirror-transformation/sssssmd3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-construction-and-mirror-transformation/sssssmd3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-construction-and-mirror-transformation/sssssmd3"/>
      <lastmod>2026-11-01T20:43:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-lines-construction-and-mirror-transformation/sssssmd3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-construction-and-mirror-transformation/sssssmd3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-construction-and-mirror-transformation/sssssmd3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-construction-and-mirror-transformation/sssssmd3"/>
      <lastmod>2026-11-01T20:43:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-lines-by-jonathan-longstaffe/sssssmdq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines-by-jonathan-longstaffe/sssssmdq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines-by-jonathan-longstaffe/sssssmdq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines-by-jonathan-longstaffe/sssssmdq"/>
      <lastmod>2026-11-02T12:05:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-lines-by-jonathan-longstaffe/sssssmdq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines-by-jonathan-longstaffe/sssssmdq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines-by-jonathan-longstaffe/sssssmdq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines-by-jonathan-longstaffe/sssssmdq"/>
      <lastmod>2026-11-02T12:05:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-congruent-segments-i/sssssmd1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-congruent-segments-i/sssssmd1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-congruent-segments-i/sssssmd1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-congruent-segments-i/sssssmd1"/>
      <lastmod>2026-11-02T09:29:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-congruent-segments-i/sssssmd1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-congruent-segments-i/sssssmd1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-congruent-segments-i/sssssmd1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-congruent-segments-i/sssssmd1"/>
      <lastmod>2026-11-02T09:29:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-vectors-as-triangle-sides/sssssmdm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-as-triangle-sides/sssssmdm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-as-triangle-sides/sssssmdm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-as-triangle-sides/sssssmdm"/>
      <lastmod>2026-11-02T00:34:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-vectors-as-triangle-sides/sssssmdm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-as-triangle-sides/sssssmdm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-as-triangle-sides/sssssmdm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-as-triangle-sides/sssssmdm"/>
      <lastmod>2026-11-02T00:34:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p2mm-symmetry/sssssmdj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p2mm-symmetry/sssssmdj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p2mm-symmetry/sssssmdj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p2mm-symmetry/sssssmdj"/>
      <lastmod>2026-11-02T16:51:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p2mm-symmetry/sssssmdj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p2mm-symmetry/sssssmdj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p2mm-symmetry/sssssmdj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p2mm-symmetry/sssssmdj"/>
      <lastmod>2026-11-02T16:51:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/boxplot-construction-and-data-analysis/sssssmdp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/boxplot-construction-and-data-analysis/sssssmdp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/boxplot-construction-and-data-analysis/sssssmdp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/boxplot-construction-and-data-analysis/sssssmdp"/>
      <lastmod>2026-11-01T23:45:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/boxplot-construction-and-data-analysis/sssssmdp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/boxplot-construction-and-data-analysis/sssssmdp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/boxplot-construction-and-data-analysis/sssssmdp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/boxplot-construction-and-data-analysis/sssssmdp"/>
      <lastmod>2026-11-01T23:45:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/seeing-divisibility-change-to-multiplication/sssssmdw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/seeing-divisibility-change-to-multiplication/sssssmdw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/seeing-divisibility-change-to-multiplication/sssssmdw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/seeing-divisibility-change-to-multiplication/sssssmdw"/>
      <lastmod>2026-11-01T23:17:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/seeing-divisibility-change-to-multiplication/sssssmdw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/seeing-divisibility-change-to-multiplication/sssssmdw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/seeing-divisibility-change-to-multiplication/sssssmdw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/seeing-divisibility-change-to-multiplication/sssssmdw"/>
      <lastmod>2026-11-01T23:17:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-transformation-and-rotation/sssssmd6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-transformation-and-rotation/sssssmd6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-transformation-and-rotation/sssssmd6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-transformation-and-rotation/sssssmd6"/>
      <lastmod>2026-11-02T18:22:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-transformation-and-rotation/sssssmd6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-transformation-and-rotation/sssssmd6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-transformation-and-rotation/sssssmd6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-transformation-and-rotation/sssssmd6"/>
      <lastmod>2026-11-02T18:22:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-investigation/sssssmdg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-investigation/sssssmdg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-investigation/sssssmdg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-investigation/sssssmdg"/>
      <lastmod>2026-11-02T18:21:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-investigation/sssssmdg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-investigation/sssssmdg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-investigation/sssssmdg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-investigation/sssssmdg"/>
      <lastmod>2026-11-02T18:21:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ship-radar-plot-position-speed-velocity-and-collision/sssssmd9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ship-radar-plot-position-speed-velocity-and-collision/sssssmd9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ship-radar-plot-position-speed-velocity-and-collision/sssssmd9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ship-radar-plot-position-speed-velocity-and-collision/sssssmd9"/>
      <lastmod>2026-11-01T19:27:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ship-radar-plot-position-speed-velocity-and-collision/sssssmd9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ship-radar-plot-position-speed-velocity-and-collision/sssssmd9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ship-radar-plot-position-speed-velocity-and-collision/sssssmd9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ship-radar-plot-position-speed-velocity-and-collision/sssssmd9"/>
      <lastmod>2026-11-01T19:27:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translating-graphs-vectors/sssssmde</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-graphs-vectors/sssssmde"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-graphs-vectors/sssssmde"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-graphs-vectors/sssssmde"/>
      <lastmod>2026-11-02T16:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translating-graphs-vectors/sssssmde</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-graphs-vectors/sssssmde"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-graphs-vectors/sssssmde"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-graphs-vectors/sssssmde"/>
      <lastmod>2026-11-02T16:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/add-to-target-value/sssssmdv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/add-to-target-value/sssssmdv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/add-to-target-value/sssssmdv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/add-to-target-value/sssssmdv"/>
      <lastmod>2026-11-01T19:12:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/add-to-target-value/sssssmdv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/add-to-target-value/sssssmdv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/add-to-target-value/sssssmdv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/add-to-target-value/sssssmdv"/>
      <lastmod>2026-11-01T19:12:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-right-triangles-pool-depth-problem/sssssmd4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-pool-depth-problem/sssssmd4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-pool-depth-problem/sssssmd4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-pool-depth-problem/sssssmd4"/>
      <lastmod>2026-11-01T19:13:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-right-triangles-pool-depth-problem/sssssmd4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-pool-depth-problem/sssssmd4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-pool-depth-problem/sssssmd4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-pool-depth-problem/sssssmd4"/>
      <lastmod>2026-11-01T19:13:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-4-whole-numbers-gr-9/sssssmdl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-4-whole-numbers-gr-9/sssssmdl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-4-whole-numbers-gr-9/sssssmdl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-4-whole-numbers-gr-9/sssssmdl"/>
      <lastmod>2026-11-02T00:18:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-4-whole-numbers-gr-9/sssssmdl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-4-whole-numbers-gr-9/sssssmdl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-4-whole-numbers-gr-9/sssssmdl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-4-whole-numbers-gr-9/sssssmdl"/>
      <lastmod>2026-11-02T00:18:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-parabolas-and-straight-lines/sssssmdy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-parabolas-and-straight-lines/sssssmdy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-parabolas-and-straight-lines/sssssmdy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-parabolas-and-straight-lines/sssssmdy"/>
      <lastmod>2026-11-02T18:21:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-parabolas-and-straight-lines/sssssmdy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-parabolas-and-straight-lines/sssssmdy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-parabolas-and-straight-lines/sssssmdy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-parabolas-and-straight-lines/sssssmdy"/>
      <lastmod>2026-11-02T18:21:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-integers-practice/sssssmda</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-integers-practice/sssssmda"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-integers-practice/sssssmda"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-integers-practice/sssssmda"/>
      <lastmod>2026-11-01T21:25:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-integers-practice/sssssmda</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-integers-practice/sssssmda"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-integers-practice/sssssmda"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-integers-practice/sssssmda"/>
      <lastmod>2026-11-01T21:25:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partners-to-eight/sssssmdc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partners-to-eight/sssssmdc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partners-to-eight/sssssmdc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partners-to-eight/sssssmdc"/>
      <lastmod>2026-11-01T20:52:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partners-to-eight/sssssmdc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partners-to-eight/sssssmdc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partners-to-eight/sssssmdc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partners-to-eight/sssssmdc"/>
      <lastmod>2026-11-01T20:52:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-calculator/sssssmdr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-calculator/sssssmdr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-calculator/sssssmdr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-calculator/sssssmdr"/>
      <lastmod>2026-11-02T17:03:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-calculator/sssssmdr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-calculator/sssssmdr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-calculator/sssssmdr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-calculator/sssssmdr"/>
      <lastmod>2026-11-02T17:03:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-rotation-geometry-demonstration/sssssmdh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-rotation-geometry-demonstration/sssssmdh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-rotation-geometry-demonstration/sssssmdh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-rotation-geometry-demonstration/sssssmdh"/>
      <lastmod>2026-11-02T18:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-rotation-geometry-demonstration/sssssmdh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-rotation-geometry-demonstration/sssssmdh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-rotation-geometry-demonstration/sssssmdh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-rotation-geometry-demonstration/sssssmdh"/>
      <lastmod>2026-11-02T18:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-regular-polygon-phenomena/sssssmdt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-regular-polygon-phenomena/sssssmdt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-regular-polygon-phenomena/sssssmdt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-regular-polygon-phenomena/sssssmdt"/>
      <lastmod>2026-11-02T02:38:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-regular-polygon-phenomena/sssssmdt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-regular-polygon-phenomena/sssssmdt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-regular-polygon-phenomena/sssssmdt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-regular-polygon-phenomena/sssssmdt"/>
      <lastmod>2026-11-02T02:38:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-prism-net-2/sssssmdx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-prism-net-2/sssssmdx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-prism-net-2/sssssmdx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-prism-net-2/sssssmdx"/>
      <lastmod>2026-11-01T21:22:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-prism-net-2/sssssmdx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-prism-net-2/sssssmdx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-prism-net-2/sssssmdx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-prism-net-2/sssssmdx"/>
      <lastmod>2026-11-01T21:22:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lagrange-multiplier/sssssmdi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lagrange-multiplier/sssssmdi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lagrange-multiplier/sssssmdi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lagrange-multiplier/sssssmdi"/>
      <lastmod>2026-11-01T20:39:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lagrange-multiplier/sssssmdi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lagrange-multiplier/sssssmdi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lagrange-multiplier/sssssmdi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lagrange-multiplier/sssssmdi"/>
      <lastmod>2026-11-01T20:39:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-angles/sssssmdo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-angles/sssssmdo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-angles/sssssmdo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-angles/sssssmdo"/>
      <lastmod>2026-11-02T17:53:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-angles/sssssmdo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-angles/sssssmdo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-angles/sssssmdo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-angles/sssssmdo"/>
      <lastmod>2026-11-02T17:53:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-using-iterated-integrals/sssssmfs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-using-iterated-integrals/sssssmfs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-using-iterated-integrals/sssssmfs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-using-iterated-integrals/sssssmfs"/>
      <lastmod>2026-11-02T18:03:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-using-iterated-integrals/sssssmfs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-using-iterated-integrals/sssssmfs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-using-iterated-integrals/sssssmfs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-using-iterated-integrals/sssssmfs"/>
      <lastmod>2026-11-02T18:03:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-compound-angle-identity-discovery-geogebra-activity-part-1/sssssmf7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-compound-angle-identity-discovery-geogebra-activity-part-1/sssssmf7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-compound-angle-identity-discovery-geogebra-activity-part-1/sssssmf7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-compound-angle-identity-discovery-geogebra-activity-part-1/sssssmf7"/>
      <lastmod>2026-11-01T21:19:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-compound-angle-identity-discovery-geogebra-activity-part-1/sssssmf7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-compound-angle-identity-discovery-geogebra-activity-part-1/sssssmf7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-compound-angle-identity-discovery-geogebra-activity-part-1/sssssmf7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-compound-angle-identity-discovery-geogebra-activity-part-1/sssssmf7"/>
      <lastmod>2026-11-01T21:19:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phil-smith-curve/sssssmfn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phil-smith-curve/sssssmfn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phil-smith-curve/sssssmfn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phil-smith-curve/sssssmfn"/>
      <lastmod>2026-11-01T21:23:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phil-smith-curve/sssssmfn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phil-smith-curve/sssssmfn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phil-smith-curve/sssssmfn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phil-smith-curve/sssssmfn"/>
      <lastmod>2026-11-01T21:23:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/steinhaus-hinged-heptagon-area-preserving-rotational-puzzle/sssssmf2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steinhaus-hinged-heptagon-area-preserving-rotational-puzzle/sssssmf2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steinhaus-hinged-heptagon-area-preserving-rotational-puzzle/sssssmf2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steinhaus-hinged-heptagon-area-preserving-rotational-puzzle/sssssmf2"/>
      <lastmod>2026-11-01T21:39:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/steinhaus-hinged-heptagon-area-preserving-rotational-puzzle/sssssmf2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steinhaus-hinged-heptagon-area-preserving-rotational-puzzle/sssssmf2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steinhaus-hinged-heptagon-area-preserving-rotational-puzzle/sssssmf2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steinhaus-hinged-heptagon-area-preserving-rotational-puzzle/sssssmf2"/>
      <lastmod>2026-11-01T21:39:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trefoil-knot-surface/sssssmfk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trefoil-knot-surface/sssssmfk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trefoil-knot-surface/sssssmfk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trefoil-knot-surface/sssssmfk"/>
      <lastmod>2026-11-02T16:38:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trefoil-knot-surface/sssssmfk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trefoil-knot-surface/sssssmfk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trefoil-knot-surface/sssssmfk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trefoil-knot-surface/sssssmfk"/>
      <lastmod>2026-11-02T16:38:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compound-interest-calculator-by-bed-prasad-dhakal/sssssmfz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compound-interest-calculator-by-bed-prasad-dhakal/sssssmfz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compound-interest-calculator-by-bed-prasad-dhakal/sssssmfz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compound-interest-calculator-by-bed-prasad-dhakal/sssssmfz"/>
      <lastmod>2026-11-01T21:01:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compound-interest-calculator-by-bed-prasad-dhakal/sssssmfz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compound-interest-calculator-by-bed-prasad-dhakal/sssssmfz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compound-interest-calculator-by-bed-prasad-dhakal/sssssmfz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compound-interest-calculator-by-bed-prasad-dhakal/sssssmfz"/>
      <lastmod>2026-11-01T21:01:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/newton-s-method-for-root-finding/sssssmf0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/newton-s-method-for-root-finding/sssssmf0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/newton-s-method-for-root-finding/sssssmf0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/newton-s-method-for-root-finding/sssssmf0"/>
      <lastmod>2026-11-01T23:17:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/newton-s-method-for-root-finding/sssssmf0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/newton-s-method-for-root-finding/sssssmf0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/newton-s-method-for-root-finding/sssssmf0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/newton-s-method-for-root-finding/sssssmf0"/>
      <lastmod>2026-11-01T23:17:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-line-segments/sssssmfd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-line-segments/sssssmfd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-line-segments/sssssmfd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-line-segments/sssssmfd"/>
      <lastmod>2026-11-02T12:05:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-line-segments/sssssmfd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-line-segments/sssssmfd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-line-segments/sssssmfd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-line-segments/sssssmfd"/>
      <lastmod>2026-11-02T12:05:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/smart-integer-puzzle-system/sssssmff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smart-integer-puzzle-system/sssssmff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smart-integer-puzzle-system/sssssmff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smart-integer-puzzle-system/sssssmff"/>
      <lastmod>2026-11-02T17:36:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/smart-integer-puzzle-system/sssssmff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smart-integer-puzzle-system/sssssmff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smart-integer-puzzle-system/sssssmff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smart-integer-puzzle-system/sssssmff"/>
      <lastmod>2026-11-02T17:36:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bank-shot-geometry-construction-example/sssssmf8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bank-shot-geometry-construction-example/sssssmf8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bank-shot-geometry-construction-example/sssssmf8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bank-shot-geometry-construction-example/sssssmf8"/>
      <lastmod>2026-11-02T00:54:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bank-shot-geometry-construction-example/sssssmf8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bank-shot-geometry-construction-example/sssssmf8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bank-shot-geometry-construction-example/sssssmf8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bank-shot-geometry-construction-example/sssssmf8"/>
      <lastmod>2026-11-02T00:54:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-transformations-of-sine-and-cosine-functions/sssssmfu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-transformations-of-sine-and-cosine-functions/sssssmfu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-transformations-of-sine-and-cosine-functions/sssssmfu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-transformations-of-sine-and-cosine-functions/sssssmfu"/>
      <lastmod>2026-11-01T23:37:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-transformations-of-sine-and-cosine-functions/sssssmfu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-transformations-of-sine-and-cosine-functions/sssssmfu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-transformations-of-sine-and-cosine-functions/sssssmfu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-transformations-of-sine-and-cosine-functions/sssssmfu"/>
      <lastmod>2026-11-01T23:37:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proving-triangles-similar-4/sssssmf5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-4/sssssmf5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-similar-4/sssssmf5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-4/sssssmf5"/>
      <lastmod>2026-11-02T18:29:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proving-triangles-similar-4/sssssmf5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-4/sssssmf5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-similar-4/sssssmf5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-4/sssssmf5"/>
      <lastmod>2026-11-02T18:29:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/confidence-interval-and-geometric-construction-in-geogebra/sssssmfb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-and-geometric-construction-in-geogebra/sssssmfb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-and-geometric-construction-in-geogebra/sssssmfb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-and-geometric-construction-in-geogebra/sssssmfb"/>
      <lastmod>2026-11-02T02:49:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/confidence-interval-and-geometric-construction-in-geogebra/sssssmfb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-and-geometric-construction-in-geogebra/sssssmfb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-and-geometric-construction-in-geogebra/sssssmfb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-and-geometric-construction-in-geogebra/sssssmfb"/>
      <lastmod>2026-11-02T02:49:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-function-input-output/sssssmf3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-function-input-output/sssssmf3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-function-input-output/sssssmf3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-function-input-output/sssssmf3"/>
      <lastmod>2026-11-02T11:04:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-function-input-output/sssssmf3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-function-input-output/sssssmf3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-function-input-output/sssssmf3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-function-input-output/sssssmf3"/>
      <lastmod>2026-11-02T11:04:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-surface-area-animation-demo/sssssmfq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-animation-demo/sssssmfq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area-animation-demo/sssssmfq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-animation-demo/sssssmfq"/>
      <lastmod>2026-11-02T18:16:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-surface-area-animation-demo/sssssmfq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-animation-demo/sssssmfq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area-animation-demo/sssssmfq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-animation-demo/sssssmfq"/>
      <lastmod>2026-11-02T18:16:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-unit-circle-by-nnhsmath/sssssmf1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-unit-circle-by-nnhsmath/sssssmf1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-unit-circle-by-nnhsmath/sssssmf1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-unit-circle-by-nnhsmath/sssssmf1"/>
      <lastmod>2026-11-02T18:50:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-unit-circle-by-nnhsmath/sssssmf1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-unit-circle-by-nnhsmath/sssssmf1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-unit-circle-by-nnhsmath/sssssmf1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-unit-circle-by-nnhsmath/sssssmf1"/>
      <lastmod>2026-11-02T18:50:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/forming-a-cone-with-cylinder-dimensions/sssssmfm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/forming-a-cone-with-cylinder-dimensions/sssssmfm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/forming-a-cone-with-cylinder-dimensions/sssssmfm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/forming-a-cone-with-cylinder-dimensions/sssssmfm"/>
      <lastmod>2026-11-02T18:57:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/forming-a-cone-with-cylinder-dimensions/sssssmfm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/forming-a-cone-with-cylinder-dimensions/sssssmfm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/forming-a-cone-with-cylinder-dimensions/sssssmfm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/forming-a-cone-with-cylinder-dimensions/sssssmfm"/>
      <lastmod>2026-11-02T18:57:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demo-of-trigonometry-and-orthocenter/sssssmfj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demo-of-trigonometry-and-orthocenter/sssssmfj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demo-of-trigonometry-and-orthocenter/sssssmfj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demo-of-trigonometry-and-orthocenter/sssssmfj"/>
      <lastmod>2026-11-01T23:50:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demo-of-trigonometry-and-orthocenter/sssssmfj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demo-of-trigonometry-and-orthocenter/sssssmfj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demo-of-trigonometry-and-orthocenter/sssssmfj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demo-of-trigonometry-and-orthocenter/sssssmfj"/>
      <lastmod>2026-11-01T23:50:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/student-translation-practice-6/sssssmfp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/student-translation-practice-6/sssssmfp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/student-translation-practice-6/sssssmfp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/student-translation-practice-6/sssssmfp"/>
      <lastmod>2026-11-02T18:06:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/student-translation-practice-6/sssssmfp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/student-translation-practice-6/sssssmfp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/student-translation-practice-6/sssssmfp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/student-translation-practice-6/sssssmfp"/>
      <lastmod>2026-11-02T18:06:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matthew-skaggs-hyperbola-example/sssssmfw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matthew-skaggs-hyperbola-example/sssssmfw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matthew-skaggs-hyperbola-example/sssssmfw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matthew-skaggs-hyperbola-example/sssssmfw"/>
      <lastmod>2026-11-02T18:16:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matthew-skaggs-hyperbola-example/sssssmfw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matthew-skaggs-hyperbola-example/sssssmfw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matthew-skaggs-hyperbola-example/sssssmfw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matthew-skaggs-hyperbola-example/sssssmfw"/>
      <lastmod>2026-11-02T18:16:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-intercept-form-of-a-line/sssssmf6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-intercept-form-of-a-line/sssssmf6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-intercept-form-of-a-line/sssssmf6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-intercept-form-of-a-line/sssssmf6"/>
      <lastmod>2026-11-02T02:42:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-intercept-form-of-a-line/sssssmf6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-intercept-form-of-a-line/sssssmf6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-intercept-form-of-a-line/sssssmf6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-intercept-form-of-a-line/sssssmf6"/>
      <lastmod>2026-11-02T02:42:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-of-regular-polygons/sssssmfg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-regular-polygons/sssssmfg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-regular-polygons/sssssmfg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-regular-polygons/sssssmfg"/>
      <lastmod>2026-11-02T18:19:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-regular-polygons/sssssmfg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-regular-polygons/sssssmfg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-regular-polygons/sssssmfg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-regular-polygons/sssssmfg"/>
      <lastmod>2026-11-02T18:19:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-288-exploring-incircle-ellipse-reflection-and-functions/sssssmf9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-288-exploring-incircle-ellipse-reflection-and-functions/sssssmf9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-288-exploring-incircle-ellipse-reflection-and-functions/sssssmf9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-288-exploring-incircle-ellipse-reflection-and-functions/sssssmf9"/>
      <lastmod>2026-11-02T18:09:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-288-exploring-incircle-ellipse-reflection-and-functions/sssssmf9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-288-exploring-incircle-ellipse-reflection-and-functions/sssssmf9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-288-exploring-incircle-ellipse-reflection-and-functions/sssssmf9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-288-exploring-incircle-ellipse-reflection-and-functions/sssssmf9"/>
      <lastmod>2026-11-02T18:09:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/system-of-a-cube/sssssmfe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-a-cube/sssssmfe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-a-cube/sssssmfe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-a-cube/sssssmfe"/>
      <lastmod>2026-11-02T08:29:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/system-of-a-cube/sssssmfe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-a-cube/sssssmfe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-a-cube/sssssmfe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-a-cube/sssssmfe"/>
      <lastmod>2026-11-02T08:29:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-extrapolation-and-interpolation-visualization/sssssmfv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-extrapolation-and-interpolation-visualization/sssssmfv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-extrapolation-and-interpolation-visualization/sssssmfv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-extrapolation-and-interpolation-visualization/sssssmfv"/>
      <lastmod>2026-11-02T10:40:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-extrapolation-and-interpolation-visualization/sssssmfv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-extrapolation-and-interpolation-visualization/sssssmfv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-extrapolation-and-interpolation-visualization/sssssmfv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-extrapolation-and-interpolation-visualization/sssssmfv"/>
      <lastmod>2026-11-02T10:40:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kepler-s-laws-of-planetary-motion/sssssmf4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kepler-s-laws-of-planetary-motion/sssssmf4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kepler-s-laws-of-planetary-motion/sssssmf4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kepler-s-laws-of-planetary-motion/sssssmf4"/>
      <lastmod>2026-11-01T19:02:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kepler-s-laws-of-planetary-motion/sssssmf4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kepler-s-laws-of-planetary-motion/sssssmf4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kepler-s-laws-of-planetary-motion/sssssmf4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kepler-s-laws-of-planetary-motion/sssssmf4"/>
      <lastmod>2026-11-01T19:02:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-equation-solution-by-graph/sssssmfl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equation-solution-by-graph/sssssmfl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equation-solution-by-graph/sssssmfl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equation-solution-by-graph/sssssmfl"/>
      <lastmod>2026-11-02T18:10:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-equation-solution-by-graph/sssssmfl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equation-solution-by-graph/sssssmfl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equation-solution-by-graph/sssssmfl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equation-solution-by-graph/sssssmfl"/>
      <lastmod>2026-11-02T18:10:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/frequency-tables-qualitative-discrete-data/sssssmfy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/frequency-tables-qualitative-discrete-data/sssssmfy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/frequency-tables-qualitative-discrete-data/sssssmfy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/frequency-tables-qualitative-discrete-data/sssssmfy"/>
      <lastmod>2026-11-02T17:12:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/frequency-tables-qualitative-discrete-data/sssssmfy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/frequency-tables-qualitative-discrete-data/sssssmfy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/frequency-tables-qualitative-discrete-data/sssssmfy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/frequency-tables-qualitative-discrete-data/sssssmfy"/>
      <lastmod>2026-11-02T17:12:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-of-circle-and-straight-lines/sssssmfa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-of-circle-and-straight-lines/sssssmfa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-of-circle-and-straight-lines/sssssmfa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-of-circle-and-straight-lines/sssssmfa"/>
      <lastmod>2026-11-02T17:17:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-of-circle-and-straight-lines/sssssmfa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-of-circle-and-straight-lines/sssssmfa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-of-circle-and-straight-lines/sssssmfa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-of-circle-and-straight-lines/sssssmfa"/>
      <lastmod>2026-11-02T17:17:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adjustable-rectangular-prism/sssssmfc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjustable-rectangular-prism/sssssmfc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjustable-rectangular-prism/sssssmfc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjustable-rectangular-prism/sssssmfc"/>
      <lastmod>2026-11-01T23:50:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adjustable-rectangular-prism/sssssmfc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjustable-rectangular-prism/sssssmfc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjustable-rectangular-prism/sssssmfc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjustable-rectangular-prism/sssssmfc"/>
      <lastmod>2026-11-01T23:50:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tracing-the-derivative-function/sssssmfr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tracing-the-derivative-function/sssssmfr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tracing-the-derivative-function/sssssmfr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tracing-the-derivative-function/sssssmfr"/>
      <lastmod>2026-11-01T19:27:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tracing-the-derivative-function/sssssmfr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tracing-the-derivative-function/sssssmfr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tracing-the-derivative-function/sssssmfr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tracing-the-derivative-function/sssssmfr"/>
      <lastmod>2026-11-01T19:27:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-similar-triangles-by-anthony-or/sssssmfh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-similar-triangles-by-anthony-or/sssssmfh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-similar-triangles-by-anthony-or/sssssmfh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-similar-triangles-by-anthony-or/sssssmfh"/>
      <lastmod>2026-11-01T23:29:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-similar-triangles-by-anthony-or/sssssmfh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-similar-triangles-by-anthony-or/sssssmfh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-similar-triangles-by-anthony-or/sssssmfh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-similar-triangles-by-anthony-or/sssssmfh"/>
      <lastmod>2026-11-01T23:29:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rate-of-change-filling-a-cylinder/sssssmft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rate-of-change-filling-a-cylinder/sssssmft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rate-of-change-filling-a-cylinder/sssssmft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rate-of-change-filling-a-cylinder/sssssmft"/>
      <lastmod>2026-11-02T13:15:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rate-of-change-filling-a-cylinder/sssssmft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rate-of-change-filling-a-cylinder/sssssmft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rate-of-change-filling-a-cylinder/sssssmft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rate-of-change-filling-a-cylinder/sssssmft"/>
      <lastmod>2026-11-02T13:15:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-multiplication-by-angela-dwane/sssssmfx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-by-angela-dwane/sssssmfx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-by-angela-dwane/sssssmfx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-by-angela-dwane/sssssmfx"/>
      <lastmod>2026-11-02T03:00:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-multiplication-by-angela-dwane/sssssmfx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-by-angela-dwane/sssssmfx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-by-angela-dwane/sssssmfx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-by-angela-dwane/sssssmfx"/>
      <lastmod>2026-11-02T03:00:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squares-of-numbers-ending-in-5/sssssmfi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-of-numbers-ending-in-5/sssssmfi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-of-numbers-ending-in-5/sssssmfi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-of-numbers-ending-in-5/sssssmfi"/>
      <lastmod>2026-11-02T00:27:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/squares-of-numbers-ending-in-5/sssssmfi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-of-numbers-ending-in-5/sssssmfi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-of-numbers-ending-in-5/sssssmfi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-of-numbers-ending-in-5/sssssmfi"/>
      <lastmod>2026-11-02T00:27:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-tangent-by-kevin/sssssmfo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-tangent-by-kevin/sssssmfo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-tangent-by-kevin/sssssmfo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-tangent-by-kevin/sssssmfo"/>
      <lastmod>2026-11-02T18:18:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-tangent-by-kevin/sssssmfo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-tangent-by-kevin/sssssmfo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-tangent-by-kevin/sssssmfo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-tangent-by-kevin/sssssmfo"/>
      <lastmod>2026-11-02T18:18:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sliced-sphere/sssssm8s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliced-sphere/sssssm8s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliced-sphere/sssssm8s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliced-sphere/sssssm8s"/>
      <lastmod>2026-11-02T06:08:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sliced-sphere/sssssm8s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliced-sphere/sssssm8s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliced-sphere/sssssm8s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliced-sphere/sssssm8s"/>
      <lastmod>2026-11-02T06:08:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/union-and-intersection-of-vector-spaces/sssssm87</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/union-and-intersection-of-vector-spaces/sssssm87"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/union-and-intersection-of-vector-spaces/sssssm87"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/union-and-intersection-of-vector-spaces/sssssm87"/>
      <lastmod>2026-11-02T17:47:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/union-and-intersection-of-vector-spaces/sssssm87</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/union-and-intersection-of-vector-spaces/sssssm87"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/union-and-intersection-of-vector-spaces/sssssm87"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/union-and-intersection-of-vector-spaces/sssssm87"/>
      <lastmod>2026-11-02T17:47:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-domain-restriction-of-cosine-function/sssssm8n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-domain-restriction-of-cosine-function/sssssm8n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-domain-restriction-of-cosine-function/sssssm8n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-domain-restriction-of-cosine-function/sssssm8n"/>
      <lastmod>2026-11-01T20:39:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-domain-restriction-of-cosine-function/sssssm8n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-domain-restriction-of-cosine-function/sssssm8n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-domain-restriction-of-cosine-function/sssssm8n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-domain-restriction-of-cosine-function/sssssm8n"/>
      <lastmod>2026-11-01T20:39:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-construction-by-mark-vasicek/sssssm82</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-mark-vasicek/sssssm82"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-construction-by-mark-vasicek/sssssm82"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-mark-vasicek/sssssm82"/>
      <lastmod>2026-11-02T16:56:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-construction-by-mark-vasicek/sssssm82</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-mark-vasicek/sssssm82"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-construction-by-mark-vasicek/sssssm82"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-mark-vasicek/sssssm82"/>
      <lastmod>2026-11-02T16:56:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-the-normal-distribution/sssssm8k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-the-normal-distribution/sssssm8k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-the-normal-distribution/sssssm8k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-the-normal-distribution/sssssm8k"/>
      <lastmod>2026-11-01T20:59:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-the-normal-distribution/sssssm8k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-the-normal-distribution/sssssm8k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-the-normal-distribution/sssssm8k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-the-normal-distribution/sssssm8k"/>
      <lastmod>2026-11-01T20:59:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eccentricity-exploration-of-conic-sections/sssssm8z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eccentricity-exploration-of-conic-sections/sssssm8z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eccentricity-exploration-of-conic-sections/sssssm8z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eccentricity-exploration-of-conic-sections/sssssm8z"/>
      <lastmod>2026-11-02T17:14:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eccentricity-exploration-of-conic-sections/sssssm8z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eccentricity-exploration-of-conic-sections/sssssm8z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eccentricity-exploration-of-conic-sections/sssssm8z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eccentricity-exploration-of-conic-sections/sssssm8z"/>
      <lastmod>2026-11-02T17:14:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dimensions-perimeter-and-area-of-similar-figures/sssssm80</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dimensions-perimeter-and-area-of-similar-figures/sssssm80"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dimensions-perimeter-and-area-of-similar-figures/sssssm80"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dimensions-perimeter-and-area-of-similar-figures/sssssm80"/>
      <lastmod>2026-11-02T18:04:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dimensions-perimeter-and-area-of-similar-figures/sssssm80</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dimensions-perimeter-and-area-of-similar-figures/sssssm80"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dimensions-perimeter-and-area-of-similar-figures/sssssm80"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dimensions-perimeter-and-area-of-similar-figures/sssssm80"/>
      <lastmod>2026-11-02T18:04:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lesson-6-5-4-adding-and-subtracting-decimals-with-many-non-zero-digits/sssssm8d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lesson-6-5-4-adding-and-subtracting-decimals-with-many-non-zero-digits/sssssm8d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lesson-6-5-4-adding-and-subtracting-decimals-with-many-non-zero-digits/sssssm8d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lesson-6-5-4-adding-and-subtracting-decimals-with-many-non-zero-digits/sssssm8d"/>
      <lastmod>2026-11-01T22:59:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lesson-6-5-4-adding-and-subtracting-decimals-with-many-non-zero-digits/sssssm8d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lesson-6-5-4-adding-and-subtracting-decimals-with-many-non-zero-digits/sssssm8d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lesson-6-5-4-adding-and-subtracting-decimals-with-many-non-zero-digits/sssssm8d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lesson-6-5-4-adding-and-subtracting-decimals-with-many-non-zero-digits/sssssm8d"/>
      <lastmod>2026-11-01T22:59:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rabbit/sssssm8f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rabbit/sssssm8f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rabbit/sssssm8f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rabbit/sssssm8f"/>
      <lastmod>2026-11-02T18:25:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rabbit/sssssm8f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rabbit/sssssm8f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rabbit/sssssm8f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rabbit/sssssm8f"/>
      <lastmod>2026-11-02T18:25:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-diagonals-investigation/sssssm88</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-diagonals-investigation/sssssm88"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-diagonals-investigation/sssssm88"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-diagonals-investigation/sssssm88"/>
      <lastmod>2026-11-02T18:25:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-diagonals-investigation/sssssm88</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-diagonals-investigation/sssssm88"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-diagonals-investigation/sssssm88"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-diagonals-investigation/sssssm88"/>
      <lastmod>2026-11-02T18:25:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shannon-s-parabola-of-wonder-by-shannon-call/sssssm8u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shannon-s-parabola-of-wonder-by-shannon-call/sssssm8u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shannon-s-parabola-of-wonder-by-shannon-call/sssssm8u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shannon-s-parabola-of-wonder-by-shannon-call/sssssm8u"/>
      <lastmod>2026-11-02T15:32:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shannon-s-parabola-of-wonder-by-shannon-call/sssssm8u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shannon-s-parabola-of-wonder-by-shannon-call/sssssm8u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shannon-s-parabola-of-wonder-by-shannon-call/sssssm8u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shannon-s-parabola-of-wonder-by-shannon-call/sssssm8u"/>
      <lastmod>2026-11-02T15:32:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-vase/sssssm85</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-vase/sssssm85"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-vase/sssssm85"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-vase/sssssm85"/>
      <lastmod>2026-11-02T18:15:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-vase/sssssm85</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-vase/sssssm85"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-vase/sssssm85"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-vase/sssssm85"/>
      <lastmod>2026-11-02T18:15:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-bisector-example/sssssm8b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-bisector-example/sssssm8b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-bisector-example/sssssm8b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-bisector-example/sssssm8b"/>
      <lastmod>2026-11-01T21:18:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/segment-bisector-example/sssssm8b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-bisector-example/sssssm8b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-bisector-example/sssssm8b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-bisector-example/sssssm8b"/>
      <lastmod>2026-11-01T21:18:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-many-triangles/sssssm83</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-many-triangles/sssssm83"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-many-triangles/sssssm83"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-many-triangles/sssssm83"/>
      <lastmod>2026-11-02T18:23:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-many-triangles/sssssm83</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-many-triangles/sssssm83"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-many-triangles/sssssm83"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-many-triangles/sssssm83"/>
      <lastmod>2026-11-02T18:23:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-transformations-x-stretch/sssssm8q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-transformations-x-stretch/sssssm8q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-transformations-x-stretch/sssssm8q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-transformations-x-stretch/sssssm8q"/>
      <lastmod>2026-11-02T16:30:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-transformations-x-stretch/sssssm8q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-transformations-x-stretch/sssssm8q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-transformations-x-stretch/sssssm8q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-transformations-x-stretch/sssssm8q"/>
      <lastmod>2026-11-02T16:30:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-basics/sssssm81</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-basics/sssssm81"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-basics/sssssm81"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-basics/sssssm81"/>
      <lastmod>2026-11-02T12:22:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-basics/sssssm81</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-basics/sssssm81"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-basics/sssssm81"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-basics/sssssm81"/>
      <lastmod>2026-11-02T12:22:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-prism-3d-net/sssssm8m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-3d-net/sssssm8m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-3d-net/sssssm8m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-3d-net/sssssm8m"/>
      <lastmod>2026-11-02T16:43:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-prism-3d-net/sssssm8m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-3d-net/sssssm8m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-3d-net/sssssm8m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-3d-net/sssssm8m"/>
      <lastmod>2026-11-02T16:43:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-project/sssssm8j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-project/sssssm8j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-project/sssssm8j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-project/sssssm8j"/>
      <lastmod>2026-11-01T23:26:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-project/sssssm8j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-project/sssssm8j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-project/sssssm8j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-project/sssssm8j"/>
      <lastmod>2026-11-01T23:26:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/midpoints-of-a-quadrilateral-form-a-parallelogram/sssssm8p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoints-of-a-quadrilateral-form-a-parallelogram/sssssm8p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoints-of-a-quadrilateral-form-a-parallelogram/sssssm8p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoints-of-a-quadrilateral-form-a-parallelogram/sssssm8p"/>
      <lastmod>2026-11-02T02:55:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/midpoints-of-a-quadrilateral-form-a-parallelogram/sssssm8p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoints-of-a-quadrilateral-form-a-parallelogram/sssssm8p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoints-of-a-quadrilateral-form-a-parallelogram/sssssm8p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoints-of-a-quadrilateral-form-a-parallelogram/sssssm8p"/>
      <lastmod>2026-11-02T02:55:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/powers-of-complex-numbers-by-judah-l-schwartz/sssssm8w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers-by-judah-l-schwartz/sssssm8w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/powers-of-complex-numbers-by-judah-l-schwartz/sssssm8w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers-by-judah-l-schwartz/sssssm8w"/>
      <lastmod>2026-11-01T23:54:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/powers-of-complex-numbers-by-judah-l-schwartz/sssssm8w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers-by-judah-l-schwartz/sssssm8w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/powers-of-complex-numbers-by-judah-l-schwartz/sssssm8w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers-by-judah-l-schwartz/sssssm8w"/>
      <lastmod>2026-11-01T23:54:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phasor-addition/sssssm86</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phasor-addition/sssssm86"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phasor-addition/sssssm86"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phasor-addition/sssssm86"/>
      <lastmod>2026-11-01T21:51:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phasor-addition/sssssm86</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phasor-addition/sssssm86"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phasor-addition/sssssm86"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phasor-addition/sssssm86"/>
      <lastmod>2026-11-01T21:51:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-symbolic-solving-of-quadratic-equations/sssssm8g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-symbolic-solving-of-quadratic-equations/sssssm8g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-symbolic-solving-of-quadratic-equations/sssssm8g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-symbolic-solving-of-quadratic-equations/sssssm8g"/>
      <lastmod>2026-11-02T02:28:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-symbolic-solving-of-quadratic-equations/sssssm8g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-symbolic-solving-of-quadratic-equations/sssssm8g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-symbolic-solving-of-quadratic-equations/sssssm8g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-symbolic-solving-of-quadratic-equations/sssssm8g"/>
      <lastmod>2026-11-02T02:28:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-aaa-congruent-triangles/sssssm89</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-aaa-congruent-triangles/sssssm89"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-aaa-congruent-triangles/sssssm89"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-aaa-congruent-triangles/sssssm89"/>
      <lastmod>2026-11-01T19:24:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-aaa-congruent-triangles/sssssm89</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-aaa-congruent-triangles/sssssm89"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-aaa-congruent-triangles/sssssm89"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-aaa-congruent-triangles/sssssm89"/>
      <lastmod>2026-11-01T19:24:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/writing-the-equation-of-a-line-from-a-graph-integer-y-intercept/sssssm8e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-the-equation-of-a-line-from-a-graph-integer-y-intercept/sssssm8e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-the-equation-of-a-line-from-a-graph-integer-y-intercept/sssssm8e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-the-equation-of-a-line-from-a-graph-integer-y-intercept/sssssm8e"/>
      <lastmod>2026-11-01T23:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/writing-the-equation-of-a-line-from-a-graph-integer-y-intercept/sssssm8e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-the-equation-of-a-line-from-a-graph-integer-y-intercept/sssssm8e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-the-equation-of-a-line-from-a-graph-integer-y-intercept/sssssm8e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-the-equation-of-a-line-from-a-graph-integer-y-intercept/sssssm8e"/>
      <lastmod>2026-11-01T23:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-different-spheres/sssssm8v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-different-spheres/sssssm8v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-and-surface-areas-of-different-spheres/sssssm8v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-different-spheres/sssssm8v"/>
      <lastmod>2026-11-02T09:33:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-and-surface-areas-of-different-spheres/sssssm8v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-different-spheres/sssssm8v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-and-surface-areas-of-different-spheres/sssssm8v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-and-surface-areas-of-different-spheres/sssssm8v"/>
      <lastmod>2026-11-02T09:33:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discovery-quadratics-example/sssssm84</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovery-quadratics-example/sssssm84"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovery-quadratics-example/sssssm84"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovery-quadratics-example/sssssm84"/>
      <lastmod>2026-11-01T21:39:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discovery-quadratics-example/sssssm84</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovery-quadratics-example/sssssm84"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovery-quadratics-example/sssssm84"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovery-quadratics-example/sssssm84"/>
      <lastmod>2026-11-01T21:39:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p6-symmetry-exercise-4-vertical-and-horizontal-symmetrical-axes/sssssm8l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p6-symmetry-exercise-4-vertical-and-horizontal-symmetrical-axes/sssssm8l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p6-symmetry-exercise-4-vertical-and-horizontal-symmetrical-axes/sssssm8l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p6-symmetry-exercise-4-vertical-and-horizontal-symmetrical-axes/sssssm8l"/>
      <lastmod>2026-11-01T20:44:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p6-symmetry-exercise-4-vertical-and-horizontal-symmetrical-axes/sssssm8l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p6-symmetry-exercise-4-vertical-and-horizontal-symmetrical-axes/sssssm8l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p6-symmetry-exercise-4-vertical-and-horizontal-symmetrical-axes/sssssm8l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p6-symmetry-exercise-4-vertical-and-horizontal-symmetrical-axes/sssssm8l"/>
      <lastmod>2026-11-01T20:44:45+00:00</lastmod>
    </url>
</urlset>
