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      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-generator-2/sssss6zx</loc>
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    <url>
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      <loc>https://www.mathplotai.com/zh/case/sirius-geometric-demo/sssss60s</loc>
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      <lastmod>2026-11-02T02:17:11+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/parallel-vectors-demo/sssss6d5</loc>
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      <loc>https://www.mathplotai.com/zh/case/cross-section-visualization/sssss6db</loc>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-ratios-demo/sssss6d3</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-ratios-demo/sssss6d3</loc>
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      <loc>https://www.mathplotai.com/zh/case/circumcircle-exploration-of-a-triangle/sssss6dq</loc>
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      <loc>https://www.mathplotai.com/en/case/circumcircle-exploration-of-a-triangle/sssss6dq</loc>
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      <loc>https://www.mathplotai.com/en/case/vector-addition-triangle-and-parallelogram-law/sssss6d1</loc>
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      <lastmod>2026-11-02T18:32:27+00:00</lastmod>
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      <lastmod>2026-11-02T09:18:46+00:00</lastmod>
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      <lastmod>2026-11-02T16:29:42+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/standard-x-intercept-of-a-fraction-function-graph/sssss6fl</loc>
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      <lastmod>2026-11-02T00:46:31+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/h2m-2019-geometry-question-8/sssss6fy</loc>
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      <loc>https://www.mathplotai.com/en/case/h2m-2019-geometry-question-8/sssss6fy</loc>
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      <loc>https://www.mathplotai.com/zh/case/inscribed-and-circumscribed-polygons-by-gabriela-sanchis/sssss6fa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-and-circumscribed-polygons-by-gabriela-sanchis/sssss6fa"/>
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      <lastmod>2026-11-02T13:35:18+00:00</lastmod>
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      <lastmod>2026-11-02T13:35:18+00:00</lastmod>
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      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-geometric-rotation-and-scaling/sssss6fc"/>
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      <lastmod>2026-11-02T11:05:24+00:00</lastmod>
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      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-transformations-by-rgelenitis/sssss6fr"/>
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      <loc>https://www.mathplotai.com/zh/case/hexahedron-as-planar-graph/sssss65s</loc>
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      <loc>https://www.mathplotai.com/zh/case/twisted-tower-of-polygons/sssss652</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/twisted-tower-of-polygons/sssss652</loc>
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      <lastmod>2026-11-01T19:24:39+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/equations-of-circles-exploration/sssss65z</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/equations-of-circles-exploration/sssss65z</loc>
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      <lastmod>2026-11-02T00:26:08+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-the-derivative-by-tobibrooks/sssss650</loc>
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      <lastmod>2026-11-01T21:52:51+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/definition-of-the-derivative-by-tobibrooks/sssss650</loc>
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      <lastmod>2026-11-01T21:52:51+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/square-based-pyramid-3d-view/sssss65f</loc>
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      <loc>https://www.mathplotai.com/zh/case/writing-sine-and-cosine-functions-with-amplitude-and-vertical-shift-changes/sssss65l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-sine-and-cosine-functions-with-amplitude-and-vertical-shift-changes/sssss65l"/>
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      <loc>https://www.mathplotai.com/en/case/writing-sine-and-cosine-functions-with-amplitude-and-vertical-shift-changes/sssss65l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-sine-and-cosine-functions-with-amplitude-and-vertical-shift-changes/sssss65l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-sine-and-cosine-functions-with-amplitude-and-vertical-shift-changes/sssss65l"/>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-and-hyperbola/sssss65y</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-and-hyperbola/sssss65y</loc>
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      <lastmod>2026-11-01T22:04:19+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/similarity-of-triangles-abc-and-def/sssss65a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-of-triangles-abc-and-def/sssss65a"/>
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    <url>
      <loc>https://www.mathplotai.com/en/case/similarity-of-triangles-abc-and-def/sssss65a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-of-triangles-abc-and-def/sssss65a"/>
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      <lastmod>2026-11-01T21:15:19+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/golden-rectangle/sssss65c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-rectangle/sssss65c"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/golden-rectangle/sssss65c"/>
      <lastmod>2026-11-01T23:37:56+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/golden-rectangle/sssss65c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-rectangle/sssss65c"/>
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      <lastmod>2026-11-01T23:37:56+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-cosine-tangent-to-90/sssss65r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-tangent-to-90/sssss65r"/>
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      <lastmod>2026-11-02T12:21:37+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/sine-cosine-tangent-to-90/sssss65r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-tangent-to-90/sssss65r"/>
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      <lastmod>2026-11-02T12:21:37+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/constant-product-of-segments-on-the-axis-of-the-hyperbola/sssss65h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constant-product-of-segments-on-the-axis-of-the-hyperbola/sssss65h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constant-product-of-segments-on-the-axis-of-the-hyperbola/sssss65h"/>
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      <lastmod>2026-11-02T17:04:20+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/constant-product-of-segments-on-the-axis-of-the-hyperbola/sssss65h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constant-product-of-segments-on-the-axis-of-the-hyperbola/sssss65h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constant-product-of-segments-on-the-axis-of-the-hyperbola/sssss65h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constant-product-of-segments-on-the-axis-of-the-hyperbola/sssss65h"/>
      <lastmod>2026-11-02T17:04:20+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/dot-plot-data-value-impact-on-statistics/sssss65t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dot-plot-data-value-impact-on-statistics/sssss65t"/>
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      <lastmod>2026-11-01T23:44:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/dot-plot-data-value-impact-on-statistics/sssss65t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dot-plot-data-value-impact-on-statistics/sssss65t"/>
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      <lastmod>2026-11-01T23:44:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombicuboctahedron-construction/sssss65x</loc>
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      <lastmod>2026-11-02T18:38:38+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/rhombicuboctahedron-construction/sssss65x</loc>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombicuboctahedron-construction/sssss65x"/>
      <lastmod>2026-11-02T18:38:38+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/shifted-form-of-parabolas/sssss65i</loc>
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      <lastmod>2026-11-01T23:39:10+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/shifted-form-of-parabolas/sssss65i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shifted-form-of-parabolas/sssss65i"/>
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      <lastmod>2026-11-01T23:39:10+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-rule-for-concave-downward-functions/sssss65o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-rule-for-concave-downward-functions/sssss65o"/>
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      <lastmod>2026-11-01T23:46:36+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-rule-for-concave-downward-functions/sssss65o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-rule-for-concave-downward-functions/sssss65o"/>
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      <lastmod>2026-11-01T23:46:36+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/implicit-differentiation-quick-check/sssss6bs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/implicit-differentiation-quick-check/sssss6bs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/implicit-differentiation-quick-check/sssss6bs"/>
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      <lastmod>2026-11-01T23:56:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/implicit-differentiation-quick-check/sssss6bs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/implicit-differentiation-quick-check/sssss6bs"/>
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      <lastmod>2026-11-01T23:56:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-set-operations-demo/sssss6b7</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-set-operations-demo/sssss6b7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-set-operations-demo/sssss6b7"/>
      <lastmod>2026-11-02T00:24:46+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-set-operations-demo/sssss6b7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-set-operations-demo/sssss6b7"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-set-operations-demo/sssss6b7"/>
      <lastmod>2026-11-02T00:24:46+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/median-median-line-vs-lsrl-for-ten-points-sssssfsd/sssss6bn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/median-median-line-vs-lsrl-for-ten-points-sssssfsd/sssss6bn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/median-median-line-vs-lsrl-for-ten-points-sssssfsd/sssss6bn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/median-median-line-vs-lsrl-for-ten-points-sssssfsd/sssss6bn"/>
      <lastmod>2026-11-02T18:52:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/median-median-line-vs-lsrl-for-ten-points-sssssfsd/sssss6bn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/median-median-line-vs-lsrl-for-ten-points-sssssfsd/sssss6bn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/median-median-line-vs-lsrl-for-ten-points-sssssfsd/sssss6bn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/median-median-line-vs-lsrl-for-ten-points-sssssfsd/sssss6bn"/>
      <lastmod>2026-11-02T18:52:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/focus-and-directrix-of-a-parabola/sssss6b2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focus-and-directrix-of-a-parabola/sssss6b2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focus-and-directrix-of-a-parabola/sssss6b2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focus-and-directrix-of-a-parabola/sssss6b2"/>
      <lastmod>2026-11-01T19:07:06+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/focus-and-directrix-of-a-parabola/sssss6b2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focus-and-directrix-of-a-parabola/sssss6b2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focus-and-directrix-of-a-parabola/sssss6b2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focus-and-directrix-of-a-parabola/sssss6b2"/>
      <lastmod>2026-11-01T19:07:06+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-template-exploring-rectangle-properties-and-geometric-construction/sssss6bk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-template-exploring-rectangle-properties-and-geometric-construction/sssss6bk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-template-exploring-rectangle-properties-and-geometric-construction/sssss6bk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-template-exploring-rectangle-properties-and-geometric-construction/sssss6bk"/>
      <lastmod>2026-11-01T19:19:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-template-exploring-rectangle-properties-and-geometric-construction/sssss6bk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-template-exploring-rectangle-properties-and-geometric-construction/sssss6bk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-template-exploring-rectangle-properties-and-geometric-construction/sssss6bk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-template-exploring-rectangle-properties-and-geometric-construction/sssss6bk"/>
      <lastmod>2026-11-01T19:19:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone-by-wayne-tilllett/sssss6bz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-wayne-tilllett/sssss6bz"/>
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      <lastmod>2026-11-01T23:35:45+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/net-of-a-cone-by-wayne-tilllett/sssss6bz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-wayne-tilllett/sssss6bz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by-wayne-tilllett/sssss6bz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-wayne-tilllett/sssss6bz"/>
      <lastmod>2026-11-01T23:35:45+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/te-reo-with-coordinates/sssss6b0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/te-reo-with-coordinates/sssss6b0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/te-reo-with-coordinates/sssss6b0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/te-reo-with-coordinates/sssss6b0"/>
      <lastmod>2026-11-02T00:36:19+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/te-reo-with-coordinates/sssss6b0</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-area-and-perimeter-demo-2/sssss6bp</loc>
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      <loc>https://www.mathplotai.com/en/case/sas-triangle-congruence/sssss6mc</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-triangle-congruence/sssss6mc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence/sssss6mc"/>
      <lastmod>2026-11-02T02:29:37+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/witch-of-agnesi/sssss6mr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/witch-of-agnesi/sssss6mr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/witch-of-agnesi/sssss6mr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/witch-of-agnesi/sssss6mr"/>
      <lastmod>2026-11-01T19:18:39+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/witch-of-agnesi/sssss6mr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/witch-of-agnesi/sssss6mr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/witch-of-agnesi/sssss6mr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/witch-of-agnesi/sssss6mr"/>
      <lastmod>2026-11-01T19:18:39+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/the-cyclic-rectangle-dynamic-construction-and-properties-of-an-inscribed-rectan/sssss6mh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-cyclic-rectangle-dynamic-construction-and-properties-of-an-inscribed-rectan/sssss6mh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-cyclic-rectangle-dynamic-construction-and-properties-of-an-inscribed-rectan/sssss6mh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-cyclic-rectangle-dynamic-construction-and-properties-of-an-inscribed-rectan/sssss6mh"/>
      <lastmod>2026-11-02T18:29:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-cyclic-rectangle-dynamic-construction-and-properties-of-an-inscribed-rectan/sssss6mh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-cyclic-rectangle-dynamic-construction-and-properties-of-an-inscribed-rectan/sssss6mh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-cyclic-rectangle-dynamic-construction-and-properties-of-an-inscribed-rectan/sssss6mh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-cyclic-rectangle-dynamic-construction-and-properties-of-an-inscribed-rectan/sssss6mh"/>
      <lastmod>2026-11-02T18:29:00+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/dividing-whole-numbers-by-fractions/sssss6mt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-whole-numbers-by-fractions/sssss6mt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-whole-numbers-by-fractions/sssss6mt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-whole-numbers-by-fractions/sssss6mt"/>
      <lastmod>2026-11-02T16:54:21+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/dividing-whole-numbers-by-fractions/sssss6mt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-whole-numbers-by-fractions/sssss6mt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-whole-numbers-by-fractions/sssss6mt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-whole-numbers-by-fractions/sssss6mt"/>
      <lastmod>2026-11-02T16:54:21+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-proof-of-sss-triangle-congruence-theorem/sssss6mx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sss-triangle-congruence-theorem/sssss6mx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-sss-triangle-congruence-theorem/sssss6mx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sss-triangle-congruence-theorem/sssss6mx"/>
      <lastmod>2026-11-01T21:31:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-proof-of-sss-triangle-congruence-theorem/sssss6mx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sss-triangle-congruence-theorem/sssss6mx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-sss-triangle-congruence-theorem/sssss6mx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sss-triangle-congruence-theorem/sssss6mx"/>
      <lastmod>2026-11-01T21:31:50+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-by-agnes-heydtmann/sssss6mi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-by-agnes-heydtmann/sssss6mi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-by-agnes-heydtmann/sssss6mi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-by-agnes-heydtmann/sssss6mi"/>
      <lastmod>2026-11-01T23:33:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-by-agnes-heydtmann/sssss6mi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-by-agnes-heydtmann/sssss6mi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-by-agnes-heydtmann/sssss6mi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-by-agnes-heydtmann/sssss6mi"/>
      <lastmod>2026-11-01T23:33:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gogeometry-action-24-dynamic-two-squares-theorem-exploration/sssss6mo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-24-dynamic-two-squares-theorem-exploration/sssss6mo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gogeometry-action-24-dynamic-two-squares-theorem-exploration/sssss6mo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gogeometry-action-24-dynamic-two-squares-theorem-exploration/sssss6mo"/>
      <lastmod>2026-11-02T13:43:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gogeometry-action-24-dynamic-two-squares-theorem-exploration/sssss6mo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-24-dynamic-two-squares-theorem-exploration/sssss6mo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gogeometry-action-24-dynamic-two-squares-theorem-exploration/sssss6mo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gogeometry-action-24-dynamic-two-squares-theorem-exploration/sssss6mo"/>
      <lastmod>2026-11-02T13:43:28+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-rule-and-a-cos-bx-function-graph/sssss6js</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-rule-and-a-cos-bx-function-graph/sssss6js"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-rule-and-a-cos-bx-function-graph/sssss6js"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-rule-and-a-cos-bx-function-graph/sssss6js"/>
      <lastmod>2026-11-02T17:17:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-rule-and-a-cos-bx-function-graph/sssss6js</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-rule-and-a-cos-bx-function-graph/sssss6js"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-rule-and-a-cos-bx-function-graph/sssss6js"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-rule-and-a-cos-bx-function-graph/sssss6js"/>
      <lastmod>2026-11-02T17:17:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-parallelogram-and-triangles-workbench/sssss6j7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-parallelogram-and-triangles-workbench/sssss6j7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-parallelogram-and-triangles-workbench/sssss6j7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-parallelogram-and-triangles-workbench/sssss6j7"/>
      <lastmod>2026-11-01T21:50:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-parallelogram-and-triangles-workbench/sssss6j7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-parallelogram-and-triangles-workbench/sssss6j7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-parallelogram-and-triangles-workbench/sssss6j7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-parallelogram-and-triangles-workbench/sssss6j7"/>
      <lastmod>2026-11-01T21:50:01+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/truchet-tile-quarter-circle-quarter-square/sssss6jn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truchet-tile-quarter-circle-quarter-square/sssss6jn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truchet-tile-quarter-circle-quarter-square/sssss6jn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truchet-tile-quarter-circle-quarter-square/sssss6jn"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truchet-tile-quarter-circle-quarter-square/sssss6jn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truchet-tile-quarter-circle-quarter-square/sssss6jn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truchet-tile-quarter-circle-quarter-square/sssss6jn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truchet-tile-quarter-circle-quarter-square/sssss6jn"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/opposite-angles-of-cyclic-quadrilaterals-with-tangent-chord-angles/sssss6j2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/opposite-angles-of-cyclic-quadrilaterals-with-tangent-chord-angles/sssss6j2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/opposite-angles-of-cyclic-quadrilaterals-with-tangent-chord-angles/sssss6j2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/opposite-angles-of-cyclic-quadrilaterals-with-tangent-chord-angles/sssss6j2"/>
      <lastmod>2026-11-01T21:07:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/opposite-angles-of-cyclic-quadrilaterals-with-tangent-chord-angles/sssss6j2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/opposite-angles-of-cyclic-quadrilaterals-with-tangent-chord-angles/sssss6j2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/opposite-angles-of-cyclic-quadrilaterals-with-tangent-chord-angles/sssss6j2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/opposite-angles-of-cyclic-quadrilaterals-with-tangent-chord-angles/sssss6j2"/>
      <lastmod>2026-11-01T21:07:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-cube-by-geogebra-classroom-activities/sssss6jk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-by-geogebra-classroom-activities/sssss6jk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cube-by-geogebra-classroom-activities/sssss6jk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-by-geogebra-classroom-activities/sssss6jk"/>
      <lastmod>2026-11-02T02:10:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-cube-by-geogebra-classroom-activities/sssss6jk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-by-geogebra-classroom-activities/sssss6jk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cube-by-geogebra-classroom-activities/sssss6jk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-by-geogebra-classroom-activities/sssss6jk"/>
      <lastmod>2026-11-02T02:10:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractal-curve-3-iterative-rotation-and-scaling-generating-random-fractals/sssss6jz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-curve-3-iterative-rotation-and-scaling-generating-random-fractals/sssss6jz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-curve-3-iterative-rotation-and-scaling-generating-random-fractals/sssss6jz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-curve-3-iterative-rotation-and-scaling-generating-random-fractals/sssss6jz"/>
      <lastmod>2026-11-01T21:22:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractal-curve-3-iterative-rotation-and-scaling-generating-random-fractals/sssss6jz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-curve-3-iterative-rotation-and-scaling-generating-random-fractals/sssss6jz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-curve-3-iterative-rotation-and-scaling-generating-random-fractals/sssss6jz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-curve-3-iterative-rotation-and-scaling-generating-random-fractals/sssss6jz"/>
      <lastmod>2026-11-01T21:22:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangles-on-a-sphere/sssss6j0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles-on-a-sphere/sssss6j0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles-on-a-sphere/sssss6j0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles-on-a-sphere/sssss6j0"/>
      <lastmod>2026-11-01T23:21:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangles-on-a-sphere/sssss6j0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles-on-a-sphere/sssss6j0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles-on-a-sphere/sssss6j0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles-on-a-sphere/sssss6j0"/>
      <lastmod>2026-11-01T23:21:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-the-2nd-derivative-test-for-extrema/sssss6jd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-the-2nd-derivative-test-for-extrema/sssss6jd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-the-2nd-derivative-test-for-extrema/sssss6jd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-the-2nd-derivative-test-for-extrema/sssss6jd"/>
      <lastmod>2026-11-01T23:46:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-the-2nd-derivative-test-for-extrema/sssss6jd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-the-2nd-derivative-test-for-extrema/sssss6jd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-the-2nd-derivative-test-for-extrema/sssss6jd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-the-2nd-derivative-test-for-extrema/sssss6jd"/>
      <lastmod>2026-11-01T23:46:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squares-on-sphere/sssss6jf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-on-sphere/sssss6jf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-on-sphere/sssss6jf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-on-sphere/sssss6jf"/>
      <lastmod>2026-11-01T20:46:51+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/squares-on-sphere/sssss6jf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-on-sphere/sssss6jf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-on-sphere/sssss6jf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-on-sphere/sssss6jf"/>
      <lastmod>2026-11-01T20:46:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/summary-of-conditions-for-similarity-of-triangles/sssss6j8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/summary-of-conditions-for-similarity-of-triangles/sssss6j8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/summary-of-conditions-for-similarity-of-triangles/sssss6j8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/summary-of-conditions-for-similarity-of-triangles/sssss6j8"/>
      <lastmod>2026-11-02T18:29:08+00:00</lastmod>
    </url>
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      <loc>https://www.mathplotai.com/en/case/summary-of-conditions-for-similarity-of-triangles/sssss6j8</loc>
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    <url>
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      <loc>https://www.mathplotai.com/zh/case/parabola-construction-and-properties/sssss6ws</loc>
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      <loc>https://www.mathplotai.com/zh/case/adding-fractions-with-fraction-circles/sssss6wz</loc>
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      <loc>https://www.mathplotai.com/en/case/adding-fractions-with-fraction-circles/sssss6wz</loc>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-with-right-angle-construction/sssss6w0</loc>
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      <loc>https://www.mathplotai.com/en/case/kite-with-right-angle-construction/sssss6w0</loc>
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      <lastmod>2026-11-02T13:53:04+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/merry-go-round-direction-after-release/sssss6wd</loc>
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      <loc>https://www.mathplotai.com/en/case/merry-go-round-direction-after-release/sssss6wd</loc>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/scalar-multiplication-by-matheagle/sssss6wf</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/scalar-multiplication-by-matheagle/sssss6wf</loc>
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      <lastmod>2026-11-02T17:47:13+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/second-order-ode-solver/sssss6w8</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/second-order-ode-solver/sssss6w8</loc>
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      <lastmod>2026-11-01T21:46:36+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/how-to-square-a-rectangle-equal-area-construction/sssss6wu</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/how-to-square-a-rectangle-equal-area-construction/sssss6wu</loc>
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      <loc>https://www.mathplotai.com/zh/case/rigid-kite-construction/sssss6w5</loc>
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      <lastmod>2026-11-02T17:06:18+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/rigid-kite-construction/sssss6w5</loc>
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      <lastmod>2026-11-02T17:06:18+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/parallelogram-rule-with-known-component-and-resultant/sssss6wb</loc>
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      <lastmod>2026-11-01T23:33:40+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/parallelogram-rule-with-known-component-and-resultant/sssss6wb</loc>
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      <lastmod>2026-11-01T23:33:40+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/modeling-simple-pendular-motion-with-second-order-differential-equation/sssss6w3</loc>
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      <lastmod>2026-11-01T21:11:22+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/modeling-simple-pendular-motion-with-second-order-differential-equation/sssss6w3</loc>
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      <lastmod>2026-11-01T21:11:22+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/natural-logarithm/sssss6wq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/natural-logarithm/sssss6wq"/>
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      <lastmod>2026-11-02T17:56:13+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/natural-logarithm/sssss6wq</loc>
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      <lastmod>2026-11-02T17:56:13+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/10-3-and-10-4-polygons/sssss6w1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/10-3-and-10-4-polygons/sssss6w1"/>
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      <lastmod>2026-11-01T19:35:35+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/10-3-and-10-4-polygons/sssss6w1</loc>
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      <lastmod>2026-11-01T19:35:35+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/christopher-s-conjecture-spoiler-net/sssss6wm</loc>
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      <lastmod>2026-11-02T17:45:30+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/christopher-s-conjecture-spoiler-net/sssss6wm</loc>
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      <lastmod>2026-11-02T17:45:30+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/rotate-triangle/sssss6wj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotate-triangle/sssss6wj"/>
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      <lastmod>2026-11-01T22:12:23+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/rotate-triangle/sssss6wj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotate-triangle/sssss6wj"/>
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      <lastmod>2026-11-01T22:12:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-rule-proof-1/sssss6wp</loc>
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      <lastmod>2026-11-01T23:55:20+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-rule-proof-1/sssss6wp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-rule-proof-1/sssss6wp"/>
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      <lastmod>2026-11-01T23:55:20+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-generalization-on-polygons/sssss6ww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-generalization-on-polygons/sssss6ww"/>
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      <lastmod>2026-11-02T16:41:47+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-generalization-on-polygons/sssss6ww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-generalization-on-polygons/sssss6ww"/>
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      <lastmod>2026-11-02T16:41:47+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-net-diagram/sssss6w6</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-net-diagram/sssss6w6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net-diagram/sssss6w6"/>
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      <lastmod>2026-11-01T23:41:16+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/locus-equidistant-from-a-point-and-a-line/sssss6wg</loc>
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      <lastmod>2026-11-02T14:57:54+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/locus-equidistant-from-a-point-and-a-line/sssss6wg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-equidistant-from-a-point-and-a-line/sssss6wg"/>
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      <lastmod>2026-11-02T14:57:54+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/im-8-2-10-lesson-meet-slope/sssss6gv</loc>
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      <loc>https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-demo/sssss6g4</loc>
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      <loc>https://www.mathplotai.com/zh/case/angles-in-a-pentagon/sssss6gy</loc>
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    <url>
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      <loc>https://www.mathplotai.com/zh/case/line-segment-division-and-geometric-transformation/sssss6ga</loc>
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      <loc>https://www.mathplotai.com/en/case/line-segment-division-and-geometric-transformation/sssss6ga</loc>
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      <loc>https://www.mathplotai.com/zh/case/geometric-median-of-a-tetrahedron/sssss6gc</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-median-of-a-tetrahedron/sssss6gc</loc>
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    <url>
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    <url>
      <loc>https://www.mathplotai.com/en/case/composite-solid-investigation/sssss6gh</loc>
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      <lastmod>2026-11-02T17:06:39+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/second-contour-points-of-torus-intersection/sssss6gt</loc>
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      <lastmod>2026-11-01T19:02:52+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/second-contour-points-of-torus-intersection/sssss6gt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/second-contour-points-of-torus-intersection/sssss6gt"/>
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      <lastmod>2026-11-01T19:02:52+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/rectangle-area-and-perimeter-calculation/sssss6gx</loc>
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      <lastmod>2026-11-01T23:41:07+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-area-and-perimeter-calculation/sssss6gx</loc>
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      <lastmod>2026-11-01T23:41:07+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/panther-tank-geometric-construction/sssss6gi</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/panther-tank-geometric-construction/sssss6gi</loc>
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      <lastmod>2026-11-02T02:35:03+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/triangle-area-and-perimeter-exploration/sssss6go</loc>
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      <lastmod>2026-11-02T17:09:13+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/triangle-area-and-perimeter-exploration/sssss6go</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-and-perimeter-exploration/sssss6go"/>
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      <lastmod>2026-11-02T17:09:13+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/exploring-improper-fractions-1/sssss6vk</loc>
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      <loc>https://www.mathplotai.com/zh/case/adjustable-prisms-dynamic-geometry-and-net-exploration/sssss6vz</loc>
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      <loc>https://www.mathplotai.com/zh/case/animated-net-of-a-square-pyramid-by-jakkrapan/sssss6vg</loc>
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      <loc>https://www.mathplotai.com/zh/case/geometric-series-in-quarter-squares/sssss64a</loc>
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    <url>
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      <loc>https://www.mathplotai.com/zh/case/crossing-twisted-rings/sssss64c</loc>
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      <loc>https://www.mathplotai.com/zh/case/orthonormal-columns-imply-orthonormal-rows/sssss64r</loc>
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      <loc>https://www.mathplotai.com/zh/case/hyperbola-paper-folding/sssss64h</loc>
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      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-inequalities-by-godolphin-and-latymer/sssss64t</loc>
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      <loc>https://www.mathplotai.com/en/case/geogebra-demonstration-of-islamic-geometric-patterns/sssss64x</loc>
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      <lastmod>2026-11-01T23:11:09+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/imaginary-roots-of-a-quadratic-polynomial/sssss64i</loc>
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      <lastmod>2026-11-02T15:53:54+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/building-polygons-part-2/sssss64o</loc>
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    <url>
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      <loc>https://www.mathplotai.com/zh/case/rectangular-hyperbola-properties-1-triangle-area/sssss6ls</loc>
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      <loc>https://www.mathplotai.com/en/case/rectangular-hyperbola-properties-1-triangle-area/sssss6ls</loc>
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      <loc>https://www.mathplotai.com/zh/case/outside-addition-and-subtraction-demo/sssss6l7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/outside-addition-and-subtraction-demo/sssss6l7"/>
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      <lastmod>2026-11-02T18:45:11+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/outside-addition-and-subtraction-demo/sssss6l7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/outside-addition-and-subtraction-demo/sssss6l7"/>
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      <lastmod>2026-11-02T18:45:11+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-construction/sssss6ln</loc>
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      <lastmod>2026-11-01T20:49:42+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-construction/sssss6ln</loc>
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      <lastmod>2026-11-01T20:49:42+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/pentagon-angles/sssss6l2</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/pentagon-angles/sssss6l2</loc>
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      <lastmod>2026-11-01T23:39:52+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-meaning-of-polynomial-roots-by-luka3/sssss6lk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-polynomial-roots-by-luka3/sssss6lk"/>
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      <lastmod>2026-11-01T23:18:42+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-meaning-of-polynomial-roots-by-luka3/sssss6lk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-polynomial-roots-by-luka3/sssss6lk"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-polynomial-roots-by-luka3/sssss6lk"/>
      <lastmod>2026-11-01T23:18:42+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/phantom-graph-for-f-x-x-visualizing-complex-roots-via-parametric-curves/sssss6lz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-for-f-x-x-visualizing-complex-roots-via-parametric-curves/sssss6lz"/>
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      <lastmod>2026-11-02T18:32:07+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/phantom-graph-for-f-x-x-visualizing-complex-roots-via-parametric-curves/sssss6lz</loc>
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      <lastmod>2026-11-02T18:32:07+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/normal-approximation-to-the-binomial-distribution-by-geogebra-institute-of-mei/sssss6l0</loc>
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      <loc>https://www.mathplotai.com/zh/case/build-the-net-of-a-cube-by-ivan-de-winne/sssss6lb</loc>
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      <loc>https://www.mathplotai.com/zh/case/truncated-cone-3d-construction-and-rotation-in-geogebra/sssss6lq</loc>
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      <lastmod>2026-11-01T21:51:59+00:00</lastmod>
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      <lastmod>2026-11-02T02:43:58+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-transformations/sssss6lm</loc>
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      <lastmod>2026-11-02T16:58:08+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-transformations/sssss6lm</loc>
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      <lastmod>2026-11-02T16:58:08+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/odd-numbers-in-geometry/sssss6lj</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/odd-numbers-in-geometry/sssss6lj</loc>
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      <lastmod>2026-11-02T13:02:53+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-triangular-prism/sssss6lp</loc>
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      <lastmod>2026-11-02T18:48:34+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-triangular-prism/sssss6lp</loc>
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      <lastmod>2026-11-02T18:48:34+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-cosine-at-x-0-cos-0-0/sssss6lw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-cosine-at-x-0-cos-0-0/sssss6lw"/>
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      <lastmod>2026-11-02T17:49:35+00:00</lastmod>
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    <url>
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      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-cosine-at-x-0-cos-0-0/sssss6lw"/>
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      <lastmod>2026-11-02T17:49:35+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/modular-arithmetic/sssss6l6</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/modular-arithmetic/sssss6l6</loc>
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      <lastmod>2026-11-02T18:31:09+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-inverse-cosine-function/sssss6lg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-inverse-cosine-function/sssss6lg"/>
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      <lastmod>2026-11-02T18:18:54+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-inverse-cosine-function/sssss6lg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-inverse-cosine-function/sssss6lg"/>
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      <lastmod>2026-11-02T18:18:54+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-a-hyperbola/sssss6l9</loc>
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      <lastmod>2026-11-02T02:32:37+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-a-hyperbola/sssss6l9</loc>
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      <lastmod>2026-11-02T02:32:37+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-sphere-and-functions/sssss6le</loc>
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      <lastmod>2026-11-01T21:01:53+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-sphere-and-functions/sssss6le</loc>
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      <lastmod>2026-11-01T21:01:53+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/connectivity-table-construction-example/sssss6lv</loc>
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      <lastmod>2026-11-02T17:59:14+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/logo-picasa-geometric-construction/sssss6y7</loc>
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      <loc>https://www.mathplotai.com/zh/case/the-zariski-closure-of-a-3-ellipse/sssss6yn</loc>
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      <loc>https://www.mathplotai.com/zh/case/goodness-of-fit-test-demonstration/sssss6ym</loc>
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      <loc>https://www.mathplotai.com/zh/case/elliptic-dispersion-3d-model/sssss6cn</loc>
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      <loc>https://www.mathplotai.com/en/case/elliptic-dispersion-3d-model/sssss6cn</loc>
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      <loc>https://www.mathplotai.com/zh/case/decimal-representation-of-rational-and-irrational-numbers/sssss6c2</loc>
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      <loc>https://www.mathplotai.com/en/case/decimal-representation-of-rational-and-irrational-numbers/sssss6c2</loc>
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      <lastmod>2026-11-01T23:45:58+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-right-triangle-trig/sssss6ck</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-right-triangle-trig/sssss6ck</loc>
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      <lastmod>2026-11-02T17:46:50+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/protractor-without-numbers/sssss6cz</loc>
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      <lastmod>2026-11-01T23:33:35+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/protractor-without-numbers/sssss6cz</loc>
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      <lastmod>2026-11-01T23:33:35+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/beautiful-regular-pentagon-b/sssss6c0</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/beautiful-regular-pentagon-b/sssss6c0</loc>
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      <loc>https://www.mathplotai.com/zh/case/prime-factor-decomposition-interactive-demo-random-composite-number-with-expone/sssss6cd</loc>
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      <loc>https://www.mathplotai.com/en/case/prime-factor-decomposition-interactive-demo-random-composite-number-with-expone/sssss6cd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prime-factor-decomposition-interactive-demo-random-composite-number-with-expone/sssss6cd"/>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/jen-s-age-function/sssss6cf</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/jen-s-age-function/sssss6cf</loc>
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      <lastmod>2026-11-01T23:24:50+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-hcf-through-dividing-chains-of-different-lengths/sssss6c8</loc>
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      <lastmod>2026-11-01T20:44:08+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-hcf-through-dividing-chains-of-different-lengths/sssss6c8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-hcf-through-dividing-chains-of-different-lengths/sssss6c8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-hcf-through-dividing-chains-of-different-lengths/sssss6c8"/>
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      <lastmod>2026-11-01T20:44:08+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/incenter-and-incircle-action-v2/sssss6cu</loc>
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      <lastmod>2026-11-02T09:55:47+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/incenter-and-incircle-action-v2/sssss6cu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incenter-and-incircle-action-v2/sssss6cu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incenter-and-incircle-action-v2/sssss6cu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incenter-and-incircle-action-v2/sssss6cu"/>
      <lastmod>2026-11-02T09:55:47+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-probability-problems/sssss6c5</loc>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-probability-problems/sssss6c5"/>
      <lastmod>2026-11-02T00:18:46+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-probability-problems/sssss6c5</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-probability-problems/sssss6c5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-probability-problems/sssss6c5"/>
      <lastmod>2026-11-02T00:18:46+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-kite/sssss6cb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-kite/sssss6cb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-kite/sssss6cb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-kite/sssss6cb"/>
      <lastmod>2026-11-01T23:33:22+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-kite/sssss6cb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-kite/sssss6cb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-kite/sssss6cb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-kite/sssss6cb"/>
      <lastmod>2026-11-01T23:33:22+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-and-perpendicular-exploration/sssss6c3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-and-perpendicular-exploration/sssss6c3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-and-perpendicular-exploration/sssss6c3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-and-perpendicular-exploration/sssss6c3"/>
      <lastmod>2026-11-01T21:12:29+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-and-perpendicular-exploration/sssss6c3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-and-perpendicular-exploration/sssss6c3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-and-perpendicular-exploration/sssss6c3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-and-perpendicular-exploration/sssss6c3"/>
      <lastmod>2026-11-01T21:12:29+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/carl-s-airship-addition-and-subtraction-of-negative-integers/sssss6cq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/carl-s-airship-addition-and-subtraction-of-negative-integers/sssss6cq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/carl-s-airship-addition-and-subtraction-of-negative-integers/sssss6cq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/carl-s-airship-addition-and-subtraction-of-negative-integers/sssss6cq"/>
      <lastmod>2026-11-02T09:07:45+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/carl-s-airship-addition-and-subtraction-of-negative-integers/sssss6cq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/carl-s-airship-addition-and-subtraction-of-negative-integers/sssss6cq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/carl-s-airship-addition-and-subtraction-of-negative-integers/sssss6cq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/carl-s-airship-addition-and-subtraction-of-negative-integers/sssss6cq"/>
      <lastmod>2026-11-02T09:07:45+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-and-projectiles-1-1/sssss6c1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-and-projectiles-1-1/sssss6c1"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-and-projectiles-1-1/sssss6c1"/>
      <lastmod>2026-11-02T10:52:15+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-and-projectiles-1-1/sssss6c1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-and-projectiles-1-1/sssss6c1"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-and-projectiles-1-1/sssss6c1"/>
      <lastmod>2026-11-02T10:52:15+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/continuous-distributions-example-page-46/sssss6cm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuous-distributions-example-page-46/sssss6cm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuous-distributions-example-page-46/sssss6cm"/>
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      <lastmod>2026-11-02T16:34:09+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/continuous-distributions-example-page-46/sssss6cm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuous-distributions-example-page-46/sssss6cm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuous-distributions-example-page-46/sssss6cm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuous-distributions-example-page-46/sssss6cm"/>
      <lastmod>2026-11-02T16:34:09+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/conics-via-newton-s-method/sssss6cj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conics-via-newton-s-method/sssss6cj"/>
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      <loc>https://www.mathplotai.com/zh/case/cuboid-volume-calculation-by-kevin-lee/sssss6r8</loc>
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      <loc>https://www.mathplotai.com/zh/case/polygons-interior-and-exterior-angles/sssss6r5</loc>
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      <loc>https://www.mathplotai.com/zh/case/solving-quadratic-equations-by-sep/sssss6rb</loc>
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      <loc>https://www.mathplotai.com/en/case/solving-quadratic-equations-by-sep/sssss6rb</loc>
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    <url>
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      <lastmod>2026-11-02T12:08:41+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/percentages-tax-and-tip/sssss6rm</loc>
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      <loc>https://www.mathplotai.com/zh/case/pythagorean-rectangular-prism-model/sssss6rj</loc>
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      <loc>https://www.mathplotai.com/zh/case/visualizing-square-numbers-by-sara-hald/sssss6rp</loc>
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      <loc>https://www.mathplotai.com/en/case/visualizing-square-numbers-by-sara-hald/sssss6rp</loc>
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      <loc>https://www.mathplotai.com/zh/case/dynamic-text-for-integer-addition-on-number-line/sssss6rw</loc>
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      <loc>https://www.mathplotai.com/en/case/dynamic-text-for-integer-addition-on-number-line/sssss6rw</loc>
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      <loc>https://www.mathplotai.com/zh/case/same-x-and-y-coordinates-determine-vertical-and-horizontal-lines/sssss6r6</loc>
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      <lastmod>2026-11-01T21:39:01+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/special-right-triangles-by-holly-holsopple/sssss6rg</loc>
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      <loc>https://www.mathplotai.com/zh/case/classic-optimization-of-cylinder-packaging/sssss6r9</loc>
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      <loc>https://www.mathplotai.com/en/case/classic-optimization-of-cylinder-packaging/sssss6r9</loc>
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      <lastmod>2026-11-02T16:52:26+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/interpreting-negative-numbers/sssss6re</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/interpreting-negative-numbers/sssss6re</loc>
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      <lastmod>2026-11-02T10:36:41+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-quadrilaterals-assessment-16-9/sssss6rv</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-quadrilaterals-assessment-16-9/sssss6rv</loc>
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      <lastmod>2026-11-01T21:27:25+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-function-demonstration/sssss6r4</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-function-demonstration/sssss6r4</loc>
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      <lastmod>2026-11-01T19:35:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-proof-geometric-construction-with-perpendicular-lines-and-circles/sssss6rl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-proof-geometric-construction-with-perpendicular-lines-and-circles/sssss6rl"/>
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      <lastmod>2026-11-02T10:59:35+00:00</lastmod>
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    <url>
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      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-proof-geometric-construction-with-perpendicular-lines-and-circles/sssss6rl"/>
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      <lastmod>2026-11-02T10:59:35+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-vector-exploration/sssss6ry</loc>
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      <lastmod>2026-11-02T09:31:03+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/3d-vector-exploration/sssss6ry</loc>
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      <lastmod>2026-11-02T09:31:03+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/estimating-irrational-numbers-quiz-interactive-geogebra-assessment/sssss6ra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-irrational-numbers-quiz-interactive-geogebra-assessment/sssss6ra"/>
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      <lastmod>2026-11-02T12:35:48+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/estimating-irrational-numbers-quiz-interactive-geogebra-assessment/sssss6ra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-irrational-numbers-quiz-interactive-geogebra-assessment/sssss6ra"/>
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      <lastmod>2026-11-02T12:35:48+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/circumference-and-wheels/sssss6rc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumference-and-wheels/sssss6rc"/>
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      <lastmod>2026-11-02T10:37:33+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/circumference-and-wheels/sssss6rc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumference-and-wheels/sssss6rc"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumference-and-wheels/sssss6rc"/>
      <lastmod>2026-11-02T10:37:33+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-functions-challenge-interactive-exploration-of-forms-and-graphs/sssss6rr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-challenge-interactive-exploration-of-forms-and-graphs/sssss6rr"/>
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      <lastmod>2026-11-02T03:01:26+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/quadratic-functions-challenge-interactive-exploration-of-forms-and-graphs/sssss6rr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-challenge-interactive-exploration-of-forms-and-graphs/sssss6rr"/>
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      <lastmod>2026-11-02T03:01:26+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/number-line-inequalities/sssss6rh</loc>
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      <lastmod>2026-11-02T00:35:17+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/number-line-inequalities/sssss6rh</loc>
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      <lastmod>2026-11-02T00:35:17+00:00</lastmod>
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    <url>
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      <loc>https://www.mathplotai.com/zh/case/matrix-inverse-with-gauss-jordan-elimination/sssss6hn</loc>
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      <loc>https://www.mathplotai.com/zh/case/geogebra-optimization-problem-construction-example/sssss6h0</loc>
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      <loc>https://www.mathplotai.com/zh/case/law-of-cosines-for-obtuse-triangle/sssss6h8</loc>
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      <loc>https://www.mathplotai.com/zh/case/central-angle-of-regular-polygons/sssss6hu</loc>
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      <loc>https://www.mathplotai.com/en/case/central-angle-of-regular-polygons/sssss6hu</loc>
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      <loc>https://www.mathplotai.com/zh/case/modified-boxplot/sssss6h1</loc>
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      <loc>https://www.mathplotai.com/en/case/modified-boxplot/sssss6h1</loc>
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      <loc>https://www.mathplotai.com/zh/case/3d-prisms-demo/sssss6hm</loc>
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      <loc>https://www.mathplotai.com/en/case/3d-prisms-demo/sssss6hm</loc>
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      <loc>https://www.mathplotai.com/en/case/division-introduction/sssss6hp</loc>
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      <loc>https://www.mathplotai.com/zh/case/graph-of-a-quadratic-polynomial/sssss6hw</loc>
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      <loc>https://www.mathplotai.com/en/case/graph-of-a-quadratic-polynomial/sssss6hw</loc>
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      <loc>https://www.mathplotai.com/zh/case/fraction-comparison-geogebra-example/sssss6h6</loc>
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      <loc>https://www.mathplotai.com/en/case/fraction-comparison-geogebra-example/sssss6h6</loc>
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      <lastmod>2026-11-02T18:41:35+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/max-bill-s-geometric-construction/sssss6hg</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/max-bill-s-geometric-construction/sssss6hg</loc>
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      <lastmod>2026-11-02T10:47:33+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/sas-triangle-congruence-exploration-by-julian-ornelas/sssss6h9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence-exploration-by-julian-ornelas/sssss6h9"/>
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      <lastmod>2026-11-02T14:58:51+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/sas-triangle-congruence-exploration-by-julian-ornelas/sssss6h9</loc>
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      <lastmod>2026-11-02T14:58:51+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/reflections-over-x-and-y-axes/sssss6he</loc>
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      <lastmod>2026-11-02T09:56:34+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/reflections-over-x-and-y-axes/sssss6he</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-over-x-and-y-axes/sssss6he"/>
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      <loc>https://www.mathplotai.com/zh/case/vectors-assessment-buckersfield/sssss6hv</loc>
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      <lastmod>2026-11-01T23:58:32+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-assessment-buckersfield/sssss6hv</loc>
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      <lastmod>2026-11-01T23:58:32+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-right-cone/sssss6h4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-right-cone/sssss6h4"/>
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      <lastmod>2026-11-02T00:48:32+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-right-cone/sssss6h4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-right-cone/sssss6h4"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-right-cone/sssss6h4"/>
      <lastmod>2026-11-02T00:48:32+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/corona-virus-spread-model-in-february-2020/sssss6hl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corona-virus-spread-model-in-february-2020/sssss6hl"/>
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      <lastmod>2026-11-01T19:18:59+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/corona-virus-spread-model-in-february-2020/sssss6hl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corona-virus-spread-model-in-february-2020/sssss6hl"/>
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      <lastmod>2026-11-01T19:18:59+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-unit-circle/sssss6hy</loc>
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      <lastmod>2026-11-02T17:47:27+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/dynamic-unit-circle/sssss6hy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-unit-circle/sssss6hy"/>
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      <lastmod>2026-11-02T17:47:27+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/convex-or-concave-polygons/sssss6ha</loc>
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      <lastmod>2026-11-01T19:28:19+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/convex-or-concave-polygons/sssss6ha</loc>
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      <lastmod>2026-11-01T19:28:19+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/continuity-for-bezier-curves/sssss6hc</loc>
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      <loc>https://www.mathplotai.com/zh/case/coordinate-figures-and-their-areas/sssss6tq</loc>
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      <loc>https://www.mathplotai.com/zh/case/fraction-division-geogebra-example-by-vianikurniawati27/sssss6tp</loc>
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      <loc>https://www.mathplotai.com/zh/case/volume-of-rectangular-prisms-by-tammy/sssss6tw</loc>
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      <loc>https://www.mathplotai.com/en/case/volume-of-rectangular-prisms-by-tammy/sssss6tw</loc>
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      <lastmod>2026-11-02T18:09:35+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/cylinder-construction-by-a-schwing/sssss6t6</loc>
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      <loc>https://www.mathplotai.com/en/case/cylinder-construction-by-a-schwing/sssss6t6</loc>
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      <lastmod>2026-11-02T18:17:23+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-layer-problem/sssss6tg</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/cube-layer-problem/sssss6tg</loc>
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      <lastmod>2026-11-01T23:43:56+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/conic-section-through-five-random-points/sssss6t9</loc>
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      <lastmod>2026-11-01T19:26:54+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/conic-section-through-five-random-points/sssss6t9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-section-through-five-random-points/sssss6t9"/>
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      <lastmod>2026-11-01T19:26:54+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/absolute-value-equations-and-inequalities-by-jesus-perez/sssss6te</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/absolute-value-equations-and-inequalities-by-jesus-perez/sssss6te"/>
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      <loc>https://www.mathplotai.com/en/case/absolute-value-equations-and-inequalities-by-jesus-perez/sssss6te</loc>
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      <lastmod>2026-11-02T17:42:25+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-right-sphere/sssss6tv</loc>
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      <lastmod>2026-11-02T18:17:06+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-right-sphere/sssss6tv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-right-sphere/sssss6tv"/>
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      <lastmod>2026-11-02T18:17:06+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/kaylie-number-stack-example/sssss6t4</loc>
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      <lastmod>2026-11-01T21:10:20+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/kaylie-number-stack-example/sssss6t4</loc>
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      <lastmod>2026-11-01T21:10:20+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-construction/sssss6tl</loc>
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      <lastmod>2026-11-02T18:06:42+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/histogram-construction/sssss6tl</loc>
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      <lastmod>2026-11-02T18:06:42+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/cosine-function-derivative-demo/sssss6to</loc>
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      <lastmod>2026-11-01T21:29:01+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/polygon-construction-example/sssss6x0</loc>
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      <loc>https://www.mathplotai.com/zh/case/parabolas-focus-directrix-and-geometric-properties/sssss6xd</loc>
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      <loc>https://www.mathplotai.com/zh/case/compound-transformations-between-two-triangles/sssss6xf</loc>
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      <loc>https://www.mathplotai.com/zh/case/exploring-congruence-through-transformations/sssss6x3</loc>
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      <lastmod>2026-11-02T10:37:09+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/add-two-numbers-less-than-20/sssss6xj</loc>
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      <lastmod>2026-11-01T19:28:28+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/odd-symmetry-demonstration-by-will-truong/sssss6xp</loc>
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      <loc>https://www.mathplotai.com/en/case/odd-symmetry-demonstration-by-will-truong/sssss6xp</loc>
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      <lastmod>2026-11-02T09:12:16+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-area-sector/sssss6xw</loc>
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      <lastmod>2026-11-02T18:48:08+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/circle-area-sector/sssss6xw</loc>
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      <lastmod>2026-11-02T18:48:08+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/oresme-conjunction-of-heavenly-bodies/sssss6x6</loc>
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      <lastmod>2026-11-01T23:31:23+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/oresme-conjunction-of-heavenly-bodies/sssss6x6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oresme-conjunction-of-heavenly-bodies/sssss6x6"/>
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      <lastmod>2026-11-01T23:31:23+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-tangents/sssss6xg</loc>
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      <lastmod>2026-11-01T21:12:58+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-tangents/sssss6xg</loc>
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      <lastmod>2026-11-01T21:12:58+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-sine-cosine-and-tangent-ratios/sssss6x9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-sine-cosine-and-tangent-ratios/sssss6x9"/>
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      <lastmod>2026-11-02T18:06:09+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-sine-cosine-and-tangent-ratios/sssss6x9</loc>
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      <lastmod>2026-11-02T18:06:09+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/bisection-method-to-find-real-roots-of-an-equation/sssss6xe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisection-method-to-find-real-roots-of-an-equation/sssss6xe"/>
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      <loc>https://www.mathplotai.com/zh/case/representing-decimal-numbers-on-number-line/sssss6x4</loc>
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      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-by-mathimation/sssss6o7</loc>
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      <loc>https://www.mathplotai.com/en/case/parallelogram-square-rectangle-rhombus/sssssgss</loc>
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      <lastmod>2026-11-02T10:53:38+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/sphere-plane-cross-section-interactive-investigation/sssssgsp</loc>
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      <loc>https://www.mathplotai.com/en/case/pyramid-and-its-net/sssssgs9</loc>
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      <loc>https://www.mathplotai.com/zh/case/triangles-activity-1-pre-pythagoras/sssssgse</loc>
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      <loc>https://www.mathplotai.com/en/case/triangles-activity-1-pre-pythagoras/sssssgse</loc>
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      <lastmod>2026-11-01T20:53:27+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/area-of-triangle-with-related-rectangle/sssssgsv</loc>
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      <lastmod>2026-11-02T02:38:40+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/area-of-triangle-with-related-rectangle/sssssgsv</loc>
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      <loc>https://www.mathplotai.com/zh/case/fractal-curve-7/sssssgs4</loc>
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      <loc>https://www.mathplotai.com/zh/case/acute-angles-of-a-right-triangle/sssssgsl</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/acute-angles-of-a-right-triangle/sssssgsl</loc>
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      <lastmod>2026-11-01T21:40:49+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/powers-of-complex-numbers-by-r-vozzo/sssssgsy</loc>
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      <loc>https://www.mathplotai.com/en/case/powers-of-complex-numbers-by-r-vozzo/sssssgsy</loc>
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      <loc>https://www.mathplotai.com/zh/case/field-of-view-calculator/sssssgsa</loc>
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      <loc>https://www.mathplotai.com/zh/case/exploring-fraction-division-by-ibrahim-el-hage/sssssgsc</loc>
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      <loc>https://www.mathplotai.com/en/case/exploring-fraction-division-by-ibrahim-el-hage/sssssgsc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-fraction-division-by-ibrahim-el-hage/sssssgsc"/>
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      <lastmod>2026-11-02T17:02:04+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/similar-triangles-and-polygon-division-via-dilation/sssssgsr</loc>
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      <lastmod>2026-11-02T18:33:46+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-and-polygon-division-via-dilation/sssssgsr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-and-polygon-division-via-dilation/sssssgsr"/>
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      <lastmod>2026-11-02T18:33:46+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-quadrant-identities/sssssgsh</loc>
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      <lastmod>2026-11-02T18:55:39+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-quadrant-identities/sssssgsh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-quadrant-identities/sssssgsh"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-quadrant-identities/sssssgsh"/>
      <lastmod>2026-11-02T18:55:39+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/end-behavior-of-polynomial-functions-by-dan-mosher/sssssgst</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/end-behavior-of-polynomial-functions-by-dan-mosher/sssssgst"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/end-behavior-of-polynomial-functions-by-dan-mosher/sssssgst"/>
      <lastmod>2026-11-02T03:01:32+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/end-behavior-of-polynomial-functions-by-dan-mosher/sssssgst</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/end-behavior-of-polynomial-functions-by-dan-mosher/sssssgst"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/end-behavior-of-polynomial-functions-by-dan-mosher/sssssgst"/>
      <lastmod>2026-11-02T03:01:32+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/dot-products-of-plane-vectors/sssssgsx</loc>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dot-products-of-plane-vectors/sssssgsx"/>
      <lastmod>2026-11-02T12:10:59+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/dot-products-of-plane-vectors/sssssgsx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dot-products-of-plane-vectors/sssssgsx"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dot-products-of-plane-vectors/sssssgsx"/>
      <lastmod>2026-11-02T12:10:59+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/series-of-cubes/sssssgsi</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/series-of-cubes/sssssgsi"/>
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      <lastmod>2026-11-01T21:00:02+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/series-of-cubes/sssssgsi</loc>
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      <lastmod>2026-11-01T21:00:02+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-congruent-figures/sssssgso</loc>
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      <lastmod>2026-11-02T18:17:41+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-congruent-figures/sssssgso</loc>
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      <lastmod>2026-11-02T18:17:41+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/fraction-comparison-by-daniel-mentrard/sssssg7x</loc>
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      <loc>https://www.mathplotai.com/zh/case/superimposable-right-triangles-construction/sssssg7o</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/superimposable-right-triangles-construction/sssssg7o</loc>
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      <loc>https://www.mathplotai.com/en/case/complex-number-multiplication/sssssgns</loc>
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      <lastmod>2026-11-01T21:12:15+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/area-grid-with-length-and-width-visualizing-multiplication/sssssgn7</loc>
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      <lastmod>2026-11-01T21:40:31+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/geometric-construction-circles-and-polygons/sssssgnn</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-example/sssssgn2</loc>
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      <lastmod>2026-11-02T09:15:51+00:00</lastmod>
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      <lastmod>2026-11-02T16:31:01+00:00</lastmod>
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      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-transformations-of-sine-and-cosine-functions-radians/sssssgnk"/>
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      <lastmod>2026-11-02T16:31:01+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/incircle-of-a-triangle/sssssgnz</loc>
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      <lastmod>2026-11-01T23:55:25+00:00</lastmod>
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      <lastmod>2026-11-02T03:15:30+00:00</lastmod>
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    <url>
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      <lastmod>2026-11-02T03:15:30+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/investigate-parallel-lines/sssssgnf</loc>
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      <lastmod>2026-11-02T02:42:42+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/investigate-parallel-lines/sssssgnf</loc>
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      <lastmod>2026-11-02T02:42:42+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/directional-derivative-by-daniel-vallieres/sssssgn8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-by-daniel-vallieres/sssssgn8"/>
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      <lastmod>2026-11-02T00:27:01+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/directional-derivative-by-daniel-vallieres/sssssgn8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-by-daniel-vallieres/sssssgn8"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivative-by-daniel-vallieres/sssssgn8"/>
      <lastmod>2026-11-02T00:27:01+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/gogeometry-action-180-equilateral-triangle-with-perpendicular-lines/sssssgnu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-180-equilateral-triangle-with-perpendicular-lines/sssssgnu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gogeometry-action-180-equilateral-triangle-with-perpendicular-lines/sssssgnu"/>
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      <lastmod>2026-11-01T21:37:52+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/gogeometry-action-180-equilateral-triangle-with-perpendicular-lines/sssssgnu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-180-equilateral-triangle-with-perpendicular-lines/sssssgnu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gogeometry-action-180-equilateral-triangle-with-perpendicular-lines/sssssgnu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gogeometry-action-180-equilateral-triangle-with-perpendicular-lines/sssssgnu"/>
      <lastmod>2026-11-01T21:37:52+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/tangent-and-normal-line-of-hyperbola/sssssgn5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-and-normal-line-of-hyperbola/sssssgn5"/>
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      <lastmod>2026-11-02T00:03:59+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-and-normal-line-of-hyperbola/sssssgn5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-and-normal-line-of-hyperbola/sssssgn5"/>
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      <lastmod>2026-11-02T00:03:59+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-task/sssssgnb</loc>
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      <lastmod>2026-11-02T03:01:07+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/orthocenter-task/sssssgnb</loc>
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      <lastmod>2026-11-02T03:01:07+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-vectors/sssssgn3</loc>
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      <lastmod>2026-11-02T13:58:20+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/2d-vectors/sssssgn3</loc>
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      <lastmod>2026-11-02T13:58:20+00:00</lastmod>
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      <lastmod>2026-11-02T17:58:51+00:00</lastmod>
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      <lastmod>2026-11-02T17:58:51+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/imagine-splitting-a-circle/sssssg28</loc>
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      <loc>https://www.mathplotai.com/zh/case/exponential-functions-gradient-tangent-slope-visualization/sssssg2u</loc>
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      <lastmod>2026-11-01T21:30:25+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/exponential-functions-gradient-tangent-slope-visualization/sssssg2u</loc>
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      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-youngcar/sssssg25</loc>
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      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-youngcar/sssssg25</loc>
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      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-amy-brodesky/sssssg2b</loc>
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      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-amy-brodesky/sssssg2b</loc>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/ssa-exploration/sssssg23</loc>
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    <url>
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      <lastmod>2026-11-02T17:09:06+00:00</lastmod>
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      <lastmod>2026-11-02T16:37:31+00:00</lastmod>
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      <lastmod>2026-11-02T16:37:31+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/im-7-6-1-practice-relationships-between-quantities/sssssgk8</loc>
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      <loc>https://www.mathplotai.com/en/case/prof-stick-and-albert-explore-displacement/sssssg0y</loc>
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      <loc>https://www.mathplotai.com/zh/case/vector-equations-of-2-lines-3d/sssssg0a</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/vector-equations-of-2-lines-3d/sssssg0a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-equations-of-2-lines-3d/sssssg0a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-equations-of-2-lines-3d/sssssg0a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-equations-of-2-lines-3d/sssssg0a"/>
      <lastmod>2026-11-02T14:55:13+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/half-sphere-model-of-projective-plane/sssssg0c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/half-sphere-model-of-projective-plane/sssssg0c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/half-sphere-model-of-projective-plane/sssssg0c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/half-sphere-model-of-projective-plane/sssssg0c"/>
      <lastmod>2026-11-02T14:55:42+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/half-sphere-model-of-projective-plane/sssssg0c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/half-sphere-model-of-projective-plane/sssssg0c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/half-sphere-model-of-projective-plane/sssssg0c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/half-sphere-model-of-projective-plane/sssssg0c"/>
      <lastmod>2026-11-02T14:55:42+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-mean-leg-theorem-demo/sssssg0r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-leg-theorem-demo/sssssg0r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-leg-theorem-demo/sssssg0r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-leg-theorem-demo/sssssg0r"/>
      <lastmod>2026-11-01T23:52:07+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-mean-leg-theorem-demo/sssssg0r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-leg-theorem-demo/sssssg0r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-leg-theorem-demo/sssssg0r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-leg-theorem-demo/sssssg0r"/>
      <lastmod>2026-11-01T23:52:07+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-and-translation/sssssg0h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-translation/sssssg0h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-translation/sssssg0h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-translation/sssssg0h"/>
      <lastmod>2026-11-01T21:20:20+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-and-translation/sssssg0h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-translation/sssssg0h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-translation/sssssg0h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-translation/sssssg0h"/>
      <lastmod>2026-11-01T21:20:20+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-an-isosceles-triangle/sssssg0t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-an-isosceles-triangle/sssssg0t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-an-isosceles-triangle/sssssg0t"/>
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    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-an-isosceles-triangle/sssssg0t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-an-isosceles-triangle/sssssg0t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-an-isosceles-triangle/sssssg0t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-an-isosceles-triangle/sssssg0t"/>
      <lastmod>2026-11-01T22:00:08+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/hyperbola-3b-dynamic-construction-via-circle-and-perpendicular-bisector/sssssg0x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-3b-dynamic-construction-via-circle-and-perpendicular-bisector/sssssg0x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-3b-dynamic-construction-via-circle-and-perpendicular-bisector/sssssg0x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-3b-dynamic-construction-via-circle-and-perpendicular-bisector/sssssg0x"/>
      <lastmod>2026-11-02T17:46:48+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-3b-dynamic-construction-via-circle-and-perpendicular-bisector/sssssg0x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-3b-dynamic-construction-via-circle-and-perpendicular-bisector/sssssg0x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-3b-dynamic-construction-via-circle-and-perpendicular-bisector/sssssg0x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-3b-dynamic-construction-via-circle-and-perpendicular-bisector/sssssg0x"/>
      <lastmod>2026-11-02T17:46:48+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-construction-by-ayush-2008/sssssg0i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-ayush-2008/sssssg0i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-by-ayush-2008/sssssg0i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-ayush-2008/sssssg0i"/>
      <lastmod>2026-11-02T17:48:25+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-construction-by-ayush-2008/sssssg0i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-ayush-2008/sssssg0i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-by-ayush-2008/sssssg0i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-ayush-2008/sssssg0i"/>
      <lastmod>2026-11-02T17:48:25+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution/sssssg0o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution/sssssg0o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution/sssssg0o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution/sssssg0o"/>
      <lastmod>2026-11-01T21:26:26+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution/sssssg0o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution/sssssg0o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution/sssssg0o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution/sssssg0o"/>
      <lastmod>2026-11-01T21:26:26+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/candy-bar-measurement/sssssgds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/candy-bar-measurement/sssssgds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/candy-bar-measurement/sssssgds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/candy-bar-measurement/sssssgds"/>
      <lastmod>2026-11-01T23:36:48+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/candy-bar-measurement/sssssgds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/candy-bar-measurement/sssssgds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/candy-bar-measurement/sssssgds"/>
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      <lastmod>2026-11-01T23:36:48+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/movement-around-the-sun-gravity-driven-orbital-simulation/sssssgd7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/movement-around-the-sun-gravity-driven-orbital-simulation/sssssgd7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/movement-around-the-sun-gravity-driven-orbital-simulation/sssssgd7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/movement-around-the-sun-gravity-driven-orbital-simulation/sssssgd7"/>
      <lastmod>2026-11-01T21:09:36+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/movement-around-the-sun-gravity-driven-orbital-simulation/sssssgd7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/movement-around-the-sun-gravity-driven-orbital-simulation/sssssgd7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/movement-around-the-sun-gravity-driven-orbital-simulation/sssssgd7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/movement-around-the-sun-gravity-driven-orbital-simulation/sssssgd7"/>
      <lastmod>2026-11-01T21:09:36+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/voronoi-cones-by-tom-walsh/sssssgdn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-cones-by-tom-walsh/sssssgdn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-cones-by-tom-walsh/sssssgdn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-cones-by-tom-walsh/sssssgdn"/>
      <lastmod>2026-11-02T10:54:12+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/voronoi-cones-by-tom-walsh/sssssgdn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-cones-by-tom-walsh/sssssgdn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-cones-by-tom-walsh/sssssgdn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-cones-by-tom-walsh/sssssgdn"/>
      <lastmod>2026-11-02T10:54:12+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-animation/sssssgd2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-animation/sssssgd2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-cone-volume-animation/sssssgd2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-animation/sssssgd2"/>
      <lastmod>2026-11-02T18:17:43+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-and-cone-volume-animation/sssssgd2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-animation/sssssgd2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-cone-volume-animation/sssssgd2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-animation/sssssgd2"/>
      <lastmod>2026-11-02T18:17:43+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-linear-transformations-2-visualizing-polygon-and-vector-mappings/sssssgdk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-linear-transformations-2-visualizing-polygon-and-vector-mappings/sssssgdk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-linear-transformations-2-visualizing-polygon-and-vector-mappings/sssssgdk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-linear-transformations-2-visualizing-polygon-and-vector-mappings/sssssgdk"/>
      <lastmod>2026-11-02T18:32:38+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-linear-transformations-2-visualizing-polygon-and-vector-mappings/sssssgdk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-linear-transformations-2-visualizing-polygon-and-vector-mappings/sssssgdk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-linear-transformations-2-visualizing-polygon-and-vector-mappings/sssssgdk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-linear-transformations-2-visualizing-polygon-and-vector-mappings/sssssgdk"/>
      <lastmod>2026-11-02T18:32:38+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/number-line-drawing-tool-by-modern-secondary-mathematics/sssssgdz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-drawing-tool-by-modern-secondary-mathematics/sssssgdz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-drawing-tool-by-modern-secondary-mathematics/sssssgdz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-drawing-tool-by-modern-secondary-mathematics/sssssgdz"/>
      <lastmod>2026-11-01T20:43:57+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/number-line-drawing-tool-by-modern-secondary-mathematics/sssssgdz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-drawing-tool-by-modern-secondary-mathematics/sssssgdz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-drawing-tool-by-modern-secondary-mathematics/sssssgdz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-drawing-tool-by-modern-secondary-mathematics/sssssgdz"/>
      <lastmod>2026-11-01T20:43:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagonal-surprise/sssssgd0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-surprise/sssssgd0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-surprise/sssssgd0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-surprise/sssssgd0"/>
      <lastmod>2026-11-02T18:04:34+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/hexagonal-surprise/sssssgd0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-surprise/sssssgd0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-surprise/sssssgd0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-surprise/sssssgd0"/>
      <lastmod>2026-11-02T18:04:34+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/polygonal-controlled-by-5-variables-simplified/sssssgdd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygonal-controlled-by-5-variables-simplified/sssssgdd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygonal-controlled-by-5-variables-simplified/sssssgdd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygonal-controlled-by-5-variables-simplified/sssssgdd"/>
      <lastmod>2026-11-01T19:10:17+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/polygonal-controlled-by-5-variables-simplified/sssssgdd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygonal-controlled-by-5-variables-simplified/sssssgdd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygonal-controlled-by-5-variables-simplified/sssssgdd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygonal-controlled-by-5-variables-simplified/sssssgdd"/>
      <lastmod>2026-11-01T19:10:17+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-fractions-and-decimals-on-number-lines/sssssgdf</loc>
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      <loc>https://www.mathplotai.com/en/case/compare-fractions-and-decimals-on-number-lines/sssssgdf</loc>
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      <lastmod>2026-11-02T18:22:02+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-plane/sssssgd8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-plane/sssssgd8"/>
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      <lastmod>2026-11-02T18:47:50+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-a-line-and-a-plane/sssssgd8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-plane/sssssgd8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-line-and-a-plane/sssssgd8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-plane/sssssgd8"/>
      <lastmod>2026-11-02T18:47:50+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/frog-jump-puzzle/sssssgdu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/frog-jump-puzzle/sssssgdu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/frog-jump-puzzle/sssssgdu"/>
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      <lastmod>2026-11-02T00:32:18+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/frog-jump-puzzle/sssssgdu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/frog-jump-puzzle/sssssgdu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/frog-jump-puzzle/sssssgdu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/frog-jump-puzzle/sssssgdu"/>
      <lastmod>2026-11-02T00:32:18+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-and-pyramid-construction/sssssgd5</loc>
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      <lastmod>2026-11-02T18:13:08+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/cube-and-pyramid-construction/sssssgd5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-pyramid-construction/sssssgd5"/>
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      <lastmod>2026-11-02T18:13:08+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-cosh-are-pg-duals/sssssgdb</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-cosh-are-pg-duals/sssssgdb"/>
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      <lastmod>2026-11-02T14:54:00+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-cosh-are-pg-duals/sssssgdb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-cosh-are-pg-duals/sssssgdb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-cosh-are-pg-duals/sssssgdb"/>
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      <lastmod>2026-11-02T14:54:00+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/curve-stitching-with-rotations-envelope-curves-via-transform/sssssgd3</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-with-rotations-envelope-curves-via-transform/sssssgd3"/>
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      <lastmod>2026-11-02T00:44:56+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/curve-stitching-with-rotations-envelope-curves-via-transform/sssssgd3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-stitching-with-rotations-envelope-curves-via-transform/sssssgd3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-stitching-with-rotations-envelope-curves-via-transform/sssssgd3"/>
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      <lastmod>2026-11-02T00:44:56+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/star-polygons/sssssgdq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/star-polygons/sssssgdq"/>
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      <lastmod>2026-11-01T23:39:12+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/star-polygons/sssssgdq</loc>
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      <lastmod>2026-11-01T23:39:12+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/chrysanthemum-3d-a-3d-flower-built-from-polar-curves/sssssgd1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chrysanthemum-3d-a-3d-flower-built-from-polar-curves/sssssgd1"/>
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      <lastmod>2026-11-01T19:27:49+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/chrysanthemum-3d-a-3d-flower-built-from-polar-curves/sssssgd1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chrysanthemum-3d-a-3d-flower-built-from-polar-curves/sssssgd1"/>
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      <lastmod>2026-11-01T19:27:49+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/semcv-calendar-math-problems-may-2019-n-1-2/sssssgdm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/semcv-calendar-math-problems-may-2019-n-1-2/sssssgdm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/semcv-calendar-math-problems-may-2019-n-1-2/sssssgdm"/>
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      <lastmod>2026-11-02T02:57:42+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/semcv-calendar-math-problems-may-2019-n-1-2/sssssgdm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/semcv-calendar-math-problems-may-2019-n-1-2/sssssgdm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/semcv-calendar-math-problems-may-2019-n-1-2/sssssgdm"/>
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      <lastmod>2026-11-02T02:57:42+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/monkey-saddle-views/sssssgdj</loc>
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      <lastmod>2026-11-01T19:16:52+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/monkey-saddle-views/sssssgdj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/monkey-saddle-views/sssssgdj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/monkey-saddle-views/sssssgdj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/monkey-saddle-views/sssssgdj"/>
      <lastmod>2026-11-01T19:16:52+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/family-of-quadratic-curves/sssssgdp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/family-of-quadratic-curves/sssssgdp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/family-of-quadratic-curves/sssssgdp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/family-of-quadratic-curves/sssssgdp"/>
      <lastmod>2026-11-01T23:43:19+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/family-of-quadratic-curves/sssssgdp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/family-of-quadratic-curves/sssssgdp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/family-of-quadratic-curves/sssssgdp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/family-of-quadratic-curves/sssssgdp"/>
      <lastmod>2026-11-01T23:43:19+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolic-reflector-animation/sssssgdw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-reflector-animation/sssssgdw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-reflector-animation/sssssgdw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-reflector-animation/sssssgdw"/>
      <lastmod>2026-11-01T21:32:54+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/parabolic-reflector-animation/sssssgdw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-reflector-animation/sssssgdw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-reflector-animation/sssssgdw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-reflector-animation/sssssgdw"/>
      <lastmod>2026-11-01T21:32:54+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-to-3d-surface/sssssgd6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-to-3d-surface/sssssgd6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-to-3d-surface/sssssgd6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-to-3d-surface/sssssgd6"/>
      <lastmod>2026-11-02T17:53:21+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-to-3d-surface/sssssgd6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-to-3d-surface/sssssgd6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-to-3d-surface/sssssgd6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-to-3d-surface/sssssgd6"/>
      <lastmod>2026-11-02T17:53:21+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/new-pythagorean-theorem-for-non-similar-circles/sssssgdg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-pythagorean-theorem-for-non-similar-circles/sssssgdg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-pythagorean-theorem-for-non-similar-circles/sssssgdg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-pythagorean-theorem-for-non-similar-circles/sssssgdg"/>
      <lastmod>2026-11-02T18:24:01+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/new-pythagorean-theorem-for-non-similar-circles/sssssgdg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-pythagorean-theorem-for-non-similar-circles/sssssgdg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-pythagorean-theorem-for-non-similar-circles/sssssgdg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-pythagorean-theorem-for-non-similar-circles/sssssgdg"/>
      <lastmod>2026-11-02T18:24:01+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/arc-length-to-surface-of-revolution/sssssgd9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-to-surface-of-revolution/sssssgd9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-to-surface-of-revolution/sssssgd9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-to-surface-of-revolution/sssssgd9"/>
      <lastmod>2026-11-02T12:26:19+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/arc-length-to-surface-of-revolution/sssssgd9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-to-surface-of-revolution/sssssgd9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-to-surface-of-revolution/sssssgd9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-to-surface-of-revolution/sssssgd9"/>
      <lastmod>2026-11-02T12:26:19+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-exploration/sssssgde</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-exploration/sssssgde"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-exploration/sssssgde"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-exploration/sssssgde"/>
      <lastmod>2026-11-02T13:38:24+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-exploration/sssssgde</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-exploration/sssssgde"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-exploration/sssssgde"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-exploration/sssssgde"/>
      <lastmod>2026-11-02T13:38:24+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/level-3-simultaneous-equations/sssssgdv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/level-3-simultaneous-equations/sssssgdv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/level-3-simultaneous-equations/sssssgdv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/level-3-simultaneous-equations/sssssgdv"/>
      <lastmod>2026-11-02T18:11:09+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/level-3-simultaneous-equations/sssssgdv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/level-3-simultaneous-equations/sssssgdv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/level-3-simultaneous-equations/sssssgdv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/level-3-simultaneous-equations/sssssgdv"/>
      <lastmod>2026-11-02T18:11:09+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-difference-formula-proof/sssssgd4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-difference-formula-proof/sssssgd4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-difference-formula-proof/sssssgd4"/>
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      <loc>https://www.mathplotai.com/zh/case/deriving-the-tangent-graph-from-the-unit-circle/sssssgfe</loc>
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      <loc>https://www.mathplotai.com/zh/case/flowerlife-on-sphere/sssssgfl</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/flowerlife-on-sphere/sssssgfl</loc>
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      <loc>https://www.mathplotai.com/zh/case/construct-congruent-triangles-given-parts/sssssgfy</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/construct-congruent-triangles-given-parts/sssssgfy</loc>
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      <lastmod>2026-11-02T02:28:48+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/similar-triangles-exploration-by-akgule/sssssgfa</loc>
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      <loc>https://www.mathplotai.com/en/case/similar-triangles-exploration-by-akgule/sssssgfa</loc>
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      <lastmod>2026-11-01T19:21:01+00:00</lastmod>
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      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/external-angles-of-isosceles-and-non-isosceles-triangles/sssssgfr"/>
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      <lastmod>2026-11-02T15:07:30+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/similar-right-triangles-demo-by-robin-padron/sssssgfh</loc>
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      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-demo-by-sylvia-paredes/sssssgft"/>
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      <lastmod>2026-11-02T18:47:34+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/law-of-sines-ambiguous-case-ssa-dynamic-demo/sssssgfx</loc>
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      <loc>https://www.mathplotai.com/zh/case/area-estimation-with-upper-sum/sssssgfi</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/area-estimation-with-upper-sum/sssssgfi</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/combined-translation-demo/sssssgfo</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/quadric-surfaces/sssssg8s</loc>
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      <lastmod>2026-11-01T22:01:35+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-of-rotation/sssssg87</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/angle-of-rotation/sssssg87</loc>
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      <lastmod>2026-11-01T23:44:09+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/square-root-function-and-reflection-transformations/sssssg8n</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-function-and-reflection-transformations/sssssg8n</loc>
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      <lastmod>2026-11-01T23:51:19+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/spiral-of-theodorus-square-root-spiral/sssssg82</loc>
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      <loc>https://www.mathplotai.com/en/case/spiral-of-theodorus-square-root-spiral/sssssg82</loc>
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      <lastmod>2026-11-02T00:11:12+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/demonstrating-unstable-balance/sssssg8k</loc>
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      <loc>https://www.mathplotai.com/en/case/transformation-sequence-xt-1-18b/sssssg8g</loc>
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      <loc>https://www.mathplotai.com/zh/case/visualizing-diagonals-of-a-parallelogram-bisect-each-other/sssssg89</loc>
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      <loc>https://www.mathplotai.com/en/case/cubic-triangle/sssssg8v</loc>
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      <lastmod>2026-11-02T18:44:59+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/scrabble-score-of-your-name-random-shuffle-and-linear-fit/sssssg84</loc>
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      <loc>https://www.mathplotai.com/en/case/scrabble-score-of-your-name-random-shuffle-and-linear-fit/sssssg84</loc>
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      <lastmod>2026-11-01T21:32:45+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/trefoil-knot-parametric-curve/sssssg8l</loc>
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      <lastmod>2026-11-02T17:51:56+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/trefoil-knot-parametric-curve/sssssg8l</loc>
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      <lastmod>2026-11-02T17:51:56+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/golden-ratio-with-trigonometric-functions/sssssg8y</loc>
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      <lastmod>2026-11-02T02:39:53+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/golden-ratio-with-trigonometric-functions/sssssg8y</loc>
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      <lastmod>2026-11-02T02:39:53+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/using-3-circle-tool-and-cylinder-tool-to-draw-geometry/sssssg8a</loc>
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      <lastmod>2026-11-01T21:58:39+00:00</lastmod>
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      <lastmod>2026-11-01T21:58:39+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/parametrized-surfaces-dynamic-exploration-and-geometric-construction/sssssg8c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametrized-surfaces-dynamic-exploration-and-geometric-construction/sssssg8c"/>
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      <lastmod>2026-11-02T18:45:36+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/parametrized-surfaces-dynamic-exploration-and-geometric-construction/sssssg8c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametrized-surfaces-dynamic-exploration-and-geometric-construction/sssssg8c"/>
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      <lastmod>2026-11-02T18:45:36+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/function-graph-and-table-of-variations/sssssg8r</loc>
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      <lastmod>2026-11-01T19:28:07+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/function-graph-and-table-of-variations/sssssg8r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graph-and-table-of-variations/sssssg8r"/>
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      <lastmod>2026-11-01T19:28:07+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/radioactive-decay-demonstration/sssssg8h</loc>
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      <lastmod>2026-11-01T19:16:54+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/radioactive-decay-demonstration/sssssg8h</loc>
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      <lastmod>2026-11-01T19:16:54+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/parameters-of-sine-cosine-and-tangent-functions/sssssg8t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parameters-of-sine-cosine-and-tangent-functions/sssssg8t"/>
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      <lastmod>2026-11-01T19:27:12+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/parameters-of-sine-cosine-and-tangent-functions/sssssg8t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parameters-of-sine-cosine-and-tangent-functions/sssssg8t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parameters-of-sine-cosine-and-tangent-functions/sssssg8t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parameters-of-sine-cosine-and-tangent-functions/sssssg8t"/>
      <lastmod>2026-11-01T19:27:12+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-lookang/sssssg8x</loc>
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      <lastmod>2026-11-02T18:15:25+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-lookang/sssssg8x</loc>
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      <lastmod>2026-11-02T18:15:25+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-ellipse-hyperbola/sssssg8i</loc>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-ellipse-hyperbola/sssssg8i"/>
      <lastmod>2026-11-02T17:58:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-ellipse-hyperbola/sssssg8i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-ellipse-hyperbola/sssssg8i"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-ellipse-hyperbola/sssssg8i"/>
      <lastmod>2026-11-02T17:58:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/inch-and-centimeter-ruler/sssssg8o</loc>
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      <lastmod>2026-11-02T15:39:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/inch-and-centimeter-ruler/sssssg8o</loc>
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      <lastmod>2026-11-02T15:39:44+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/same-side-interior-angles-theorem-parallel-lines-and-a-transversal/sssssgus</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-side-interior-angles-theorem-parallel-lines-and-a-transversal/sssssgus"/>
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      <lastmod>2026-11-02T15:15:49+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/same-side-interior-angles-theorem-parallel-lines-and-a-transversal/sssssgus</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-side-interior-angles-theorem-parallel-lines-and-a-transversal/sssssgus"/>
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      <lastmod>2026-11-02T15:15:49+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/image-formation-in-plane-mirrors/sssssgu7</loc>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/image-formation-in-plane-mirrors/sssssgu7"/>
      <lastmod>2026-11-02T18:50:19+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/image-formation-in-plane-mirrors/sssssgu7</loc>
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      <lastmod>2026-11-02T18:50:19+00:00</lastmod>
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    <url>
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      <loc>https://www.mathplotai.com/en/case/residuals-to-a-regression-line/sssssguu</loc>
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      <loc>https://www.mathplotai.com/zh/case/line-integral-for-planar-curves/sssssgub</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/line-integral-for-planar-curves/sssssgub</loc>
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      <loc>https://www.mathplotai.com/zh/case/constant-surfaces-in-cartesian-cylindrical-and-spherical-coordinate-systems/sssssgu3</loc>
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      <lastmod>2026-11-02T18:22:02+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/constant-surfaces-in-cartesian-cylindrical-and-spherical-coordinate-systems/sssssgu3</loc>
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      <lastmod>2026-11-02T18:22:02+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/dilation-of-line-segment-find-scale-factor/sssssguq</loc>
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      <lastmod>2026-11-01T19:23:06+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/dilation-of-line-segment-find-scale-factor/sssssguq</loc>
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      <lastmod>2026-11-01T19:23:06+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/intersection-of-plane-and-hyperboloid-of-2-sheets/sssssgu1</loc>
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      <lastmod>2026-11-01T23:47:40+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/intersection-of-plane-and-hyperboloid-of-2-sheets/sssssgu1</loc>
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      <loc>https://www.mathplotai.com/zh/case/orthocenter-in-right-triangles/sssssgum</loc>
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      <lastmod>2026-11-01T21:16:20+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-in-right-triangles/sssssgum</loc>
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      <lastmod>2026-11-01T21:16:20+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/solving-inequalities-part-3-interactive-set-and-number-line-demo/sssssguj</loc>
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      <lastmod>2026-11-02T16:57:50+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/solving-inequalities-part-3-interactive-set-and-number-line-demo/sssssguj</loc>
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      <lastmod>2026-11-02T16:57:50+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-art-example/sssssgup</loc>
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      <lastmod>2026-11-01T21:00:22+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-surface-generation-by-rotating-curves/sssssguw</loc>
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      <loc>https://www.mathplotai.com/zh/case/convert-mixed-numbers-to-improper-fractions/sssssgu6</loc>
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      <loc>https://www.mathplotai.com/en/case/convert-mixed-numbers-to-improper-fractions/sssssgu6</loc>
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      <lastmod>2026-11-01T21:04:49+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/fraction-addition-and-subtraction-demo-by-the-central-maths-hub/sssssgug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-and-subtraction-demo-by-the-central-maths-hub/sssssgug"/>
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      <loc>https://www.mathplotai.com/en/case/fraction-addition-and-subtraction-demo-by-the-central-maths-hub/sssssgug</loc>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-distance-demonstration/sssssgu9</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-distance-demonstration/sssssgu9</loc>
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      <lastmod>2026-11-02T17:11:58+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-data-collection-with-histogram/sssssgue</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-data-collection-with-histogram/sssssgue"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-data-collection-with-histogram/sssssgue"/>
      <lastmod>2026-11-02T06:08:00+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-data-collection-with-histogram/sssssgue</loc>
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      <lastmod>2026-11-02T06:08:00+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/chaos-game/sssssguv</loc>
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      <lastmod>2026-11-02T13:27:15+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/chaos-game/sssssguv</loc>
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      <lastmod>2026-11-02T13:27:15+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/rose-and-lavender-oil-varying-proportionally/sssssgu4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rose-and-lavender-oil-varying-proportionally/sssssgu4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rose-and-lavender-oil-varying-proportionally/sssssgu4"/>
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      <lastmod>2026-11-02T08:32:51+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/rose-and-lavender-oil-varying-proportionally/sssssgu4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rose-and-lavender-oil-varying-proportionally/sssssgu4"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rose-and-lavender-oil-varying-proportionally/sssssgu4"/>
      <lastmod>2026-11-02T08:32:51+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/fitting-mexico-s-outline-with-an-implicit-curve-and-exploring-geometric-centers/sssssgul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fitting-mexico-s-outline-with-an-implicit-curve-and-exploring-geometric-centers/sssssgul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fitting-mexico-s-outline-with-an-implicit-curve-and-exploring-geometric-centers/sssssgul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fitting-mexico-s-outline-with-an-implicit-curve-and-exploring-geometric-centers/sssssgul"/>
      <lastmod>2026-11-01T20:43:34+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/fitting-mexico-s-outline-with-an-implicit-curve-and-exploring-geometric-centers/sssssgul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fitting-mexico-s-outline-with-an-implicit-curve-and-exploring-geometric-centers/sssssgul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fitting-mexico-s-outline-with-an-implicit-curve-and-exploring-geometric-centers/sssssgul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fitting-mexico-s-outline-with-an-implicit-curve-and-exploring-geometric-centers/sssssgul"/>
      <lastmod>2026-11-01T20:43:34+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/applying-circumference/sssssguy</loc>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/applying-circumference/sssssguy"/>
      <lastmod>2026-11-02T10:37:49+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/applying-circumference/sssssguy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/applying-circumference/sssssguy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/applying-circumference/sssssguy"/>
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      <lastmod>2026-11-02T10:37:49+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/voronoi-cones/sssssgua</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-cones/sssssgua"/>
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      <lastmod>2026-11-01T19:26:45+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/voronoi-cones/sssssgua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-cones/sssssgua"/>
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      <lastmod>2026-11-01T19:26:45+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/congruent-triangles-exercise/sssssguc</loc>
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      <lastmod>2026-11-02T16:37:54+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/congruent-triangles-exercise/sssssguc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-triangles-exercise/sssssguc"/>
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      <lastmod>2026-11-02T16:37:54+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-statistics-calculation-problems/sssssgur</loc>
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      <lastmod>2026-11-02T12:45:36+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/basic-statistics-calculation-problems/sssssgur</loc>
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      <lastmod>2026-11-02T12:45:36+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-demonstration-of-transformations-and-integrals/sssssguh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-transformations-and-integrals/sssssguh"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-transformations-and-integrals/sssssguh"/>
      <lastmod>2026-11-02T15:47:47+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-demonstration-of-transformations-and-integrals/sssssguh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-transformations-and-integrals/sssssguh"/>
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      <lastmod>2026-11-02T15:47:47+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/balanced-moves-practice-interactive-geometry-and-function-graphs/sssssgut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/balanced-moves-practice-interactive-geometry-and-function-graphs/sssssgut"/>
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      <lastmod>2026-11-01T20:24:56+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/balanced-moves-practice-interactive-geometry-and-function-graphs/sssssgut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/balanced-moves-practice-interactive-geometry-and-function-graphs/sssssgut"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/balanced-moves-practice-interactive-geometry-and-function-graphs/sssssgut"/>
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      <lastmod>2026-11-01T20:24:56+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/hole-8/sssssgux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-8/sssssgux"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hole-8/sssssgux"/>
      <lastmod>2026-11-02T13:42:17+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/hole-8/sssssgux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-8/sssssgux"/>
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      <lastmod>2026-11-02T13:42:17+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/folding-an-ellipse/sssssgui</loc>
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      <lastmod>2026-11-01T21:32:55+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/folding-an-ellipse/sssssgui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folding-an-ellipse/sssssgui"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folding-an-ellipse/sssssgui"/>
      <lastmod>2026-11-01T21:32:55+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/brazilian-air-routes/sssssguo</loc>
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      <lastmod>2026-11-01T21:04:19+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/brazilian-air-routes/sssssguo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/brazilian-air-routes/sssssguo"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/brazilian-air-routes/sssssguo"/>
      <lastmod>2026-11-01T21:04:19+00:00</lastmod>
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    <url>
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      <loc>https://www.mathplotai.com/en/case/exploring-trapezoids-kites/sssssgbl</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangle-investigation-2/sssssgba</loc>
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      <loc>https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-polygons/sssssgbc</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/interior-and-exterior-angles-of-polygons/sssssgbc</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-of-cubes/sssssgbr</loc>
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      <loc>https://www.mathplotai.com/zh/case/approximation-interactive-practice-number-input-and-feedback-game/sssssgbh</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/two-cylinders-in-a-trough-parametric-diagram/sssssgbt</loc>
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    <url>
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      <lastmod>2026-11-01T19:23:48+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-focus-distance-demo/sssssg34</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-focus-distance-demo/sssssg34</loc>
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      <lastmod>2026-11-02T08:37:15+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/box-plot-by-zhangkm/sssssg3l</loc>
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      <lastmod>2026-11-02T17:58:16+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/box-plot-by-zhangkm/sssssg3l</loc>
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      <loc>https://www.mathplotai.com/zh/case/tessellations-using-rotations/sssssg3y</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/tessellations-using-rotations/sssssg3y</loc>
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      <lastmod>2026-11-02T15:38:42+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/approximating-area-under-a-curve/sssssg3a</loc>
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      <lastmod>2026-11-01T21:28:27+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/approximating-area-under-a-curve/sssssg3a</loc>
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      <lastmod>2026-11-02T18:35:39+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/archimedian-approximation-of-pi/sssssg3h</loc>
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      <loc>https://www.mathplotai.com/en/case/plane-regular-polygon-in-a-sphere/sssssg10</loc>
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      <loc>https://www.mathplotai.com/zh/case/contour-of-saddle-surface-in-axonometry-3/sssssg1f</loc>
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      <lastmod>2026-11-02T02:15:07+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-demonstration/sssssgmn</loc>
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      <lastmod>2026-11-02T13:43:00+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/reflections-in-the-coordinate-plane-by-wendy-sanchez/sssssgmk</loc>
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      <lastmod>2026-11-01T20:55:17+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/polynomials-and-their-derivative-functions/sssssgmz</loc>
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      <lastmod>2026-11-01T20:55:17+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/isosceles-triangles-between-curves/sssssgpv</loc>
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      <loc>https://www.mathplotai.com/en/case/isosceles-triangles-between-curves/sssssgpv</loc>
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      <loc>https://www.mathplotai.com/zh/case/modifiable-solid-isosceles-trapezoid-cross-sections-parallel-to-yaxis/sssssgpl</loc>
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      <loc>https://www.mathplotai.com/en/case/modifiable-solid-isosceles-trapezoid-cross-sections-parallel-to-yaxis/sssssgpl</loc>
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      <loc>https://www.mathplotai.com/zh/case/measuring-the-volume-of-a-rectangular-prism/sssssgpy</loc>
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      <loc>https://www.mathplotai.com/zh/case/representing-proportional-relationships/sssssgpc</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/representing-proportional-relationships/sssssgpc</loc>
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      <lastmod>2026-11-02T10:37:50+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-and-kite-construction/sssssgpr</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-and-kite-construction/sssssgpr</loc>
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      <lastmod>2026-11-01T19:26:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-example-by-daniel/sssssgph</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-example-by-daniel/sssssgph</loc>
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      <loc>https://www.mathplotai.com/zh/case/exploring-right-triangles-by-reed-bowman/sssssgpt</loc>
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      <lastmod>2026-11-02T18:44:30+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/opposite-and-hypotenuse-in-right-triangles/sssssgpx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/opposite-and-hypotenuse-in-right-triangles/sssssgpx"/>
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      <lastmod>2026-11-01T23:09:10+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/opposite-and-hypotenuse-in-right-triangles/sssssgpx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/opposite-and-hypotenuse-in-right-triangles/sssssgpx"/>
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      <lastmod>2026-11-01T23:09:10+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/parabola-as-geometric-locus/sssssgpi</loc>
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      <lastmod>2026-11-01T20:54:21+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-as-geometric-locus/sssssgpi</loc>
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      <lastmod>2026-11-01T20:54:21+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomials-from-roots/sssssgpo</loc>
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      <lastmod>2026-11-02T18:44:43+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/polynomials-from-roots/sssssgpo</loc>
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      <lastmod>2026-11-02T18:44:43+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-sine-cosine-tangent-functions/sssssgws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-cosine-tangent-functions/sssssgws"/>
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      <lastmod>2026-11-02T18:34:43+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-sine-cosine-tangent-functions/sssssgws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-cosine-tangent-functions/sssssgws"/>
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      <lastmod>2026-11-02T18:34:43+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-by-catherine/sssssgw7</loc>
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      <lastmod>2026-11-02T09:58:49+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-by-catherine/sssssgw7</loc>
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      <lastmod>2026-11-02T09:58:49+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/homogeneous-de-solver/sssssgwn</loc>
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      <lastmod>2026-11-02T12:08:35+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/homogeneous-de-solver/sssssgwn</loc>
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      <loc>https://www.mathplotai.com/zh/case/odd-functions-another-look-take-2/sssssgw2</loc>
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      <loc>https://www.mathplotai.com/en/case/platonic-solids-and-sphere-construction/sssssgwd</loc>
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      <loc>https://www.mathplotai.com/zh/case/demonstrating-parallelogram-area/sssssgw8</loc>
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      <loc>https://www.mathplotai.com/zh/case/lift-overloading-cognitive-activator/sssssgw5</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/lift-overloading-cognitive-activator/sssssgw5</loc>
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      <lastmod>2026-11-02T14:51:57+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/location-and-spread-of-data-set/sssssgwb</loc>
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      <loc>https://www.mathplotai.com/en/case/location-and-spread-of-data-set/sssssgwb</loc>
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      <lastmod>2026-11-02T18:51:08+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/translation-exploration-by-rose-neal/sssssgwq</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/classifying-triangles-by-angles/sssssgw1</loc>
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      <lastmod>2026-11-02T02:33:28+00:00</lastmod>
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      <lastmod>2026-11-01T19:17:39+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/percentage-of-square-covered-by-random-circle/sssssgwj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-of-square-covered-by-random-circle/sssssgwj"/>
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      <lastmod>2026-11-01T19:17:39+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-amw0ng/sssssgwp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-amw0ng/sssssgwp"/>
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      <lastmod>2026-11-02T02:12:08+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/curved-surface-area-of-cones-by-amw0ng/sssssgwp</loc>
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      <loc>https://www.mathplotai.com/zh/case/circle-tangent-secant-animation/sssssgww</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/circle-tangent-secant-animation/sssssgww</loc>
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      <lastmod>2026-11-02T12:11:40+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/gradient-intercept-form-of-line-equation/sssssgw6</loc>
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    <url>
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      <loc>https://www.mathplotai.com/en/case/postulate-2/sssssgwc</loc>
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      <loc>https://www.mathplotai.com/en/case/two-angles-and-an-included-side-discovery/sssssgwr</loc>
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      <loc>https://www.mathplotai.com/en/case/nurbs-via-de-boor-s-method/sssssgwh</loc>
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    <url>
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      <lastmod>2026-11-02T09:56:20+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/vector-and-polygon-construction/sssssgwo</loc>
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    <url>
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      <loc>https://www.mathplotai.com/zh/case/primal-problem-generator/sssssg6s</loc>
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    <url>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/gogeometry-action-147/sssssg67</loc>
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    <url>
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      <lastmod>2026-11-02T18:31:19+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/plane-intersects-a-cone-exploring-conic-sections/sssssg6n</loc>
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      <lastmod>2026-11-02T00:50:34+00:00</lastmod>
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    <url>
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      <lastmod>2026-11-02T13:17:45+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/demonstrating-the-volume-of-pyramids/sssssg6j</loc>
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      <lastmod>2026-11-02T18:59:06+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-the-volume-of-pyramids/sssssg6j</loc>
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      <lastmod>2026-11-02T18:59:06+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/geogebra-demonstration-of-distributivity/sssssg6p</loc>
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      <loc>https://www.mathplotai.com/en/case/geogebra-demonstration-of-distributivity/sssssg6p</loc>
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      <lastmod>2026-11-01T23:42:10+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/geogebra-animated-ball-piecewise-functions-and-tangent-lines/sssssg6w</loc>
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      <loc>https://www.mathplotai.com/zh/case/unit-circle-investigation-1/sssssg6c</loc>
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      <lastmod>2026-11-01T21:24:04+00:00</lastmod>
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      <lastmod>2026-11-01T21:55:51+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/circle-s-area-and-perimeter-equality/sssssg6x</loc>
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      <loc>https://www.mathplotai.com/zh/case/derivative-checker/sssssggs</loc>
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      <loc>https://www.mathplotai.com/en/case/derivative-checker/sssssggs</loc>
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      <loc>https://www.mathplotai.com/zh/case/cube-parts-demonstration-by-ren-ta-v-gov/sssssgg7</loc>
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      <lastmod>2026-11-02T00:25:11+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/perimeter-and-similarity-transformation/sssssgey</loc>
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      <lastmod>2026-11-02T00:05:18+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-and-similarity-transformation/sssssgey</loc>
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      <lastmod>2026-11-02T00:05:18+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/game-8-rotating-vectors/sssssgea</loc>
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      <lastmod>2026-11-02T02:53:44+00:00</lastmod>
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      <lastmod>2026-11-01T19:14:27+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-a-sphere/sssssglw</loc>
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      <lastmod>2026-11-02T16:59:44+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/geogebra-example-multiplying-fractions/sssssgl6</loc>
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      <loc>https://www.mathplotai.com/en/case/geogebra-example-multiplying-fractions/sssssgl6</loc>
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      <lastmod>2026-11-01T21:20:51+00:00</lastmod>
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      <lastmod>2026-11-02T02:51:47+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/spheres-shells-circles-annular-rings/sssssglg</loc>
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      <lastmod>2026-11-02T02:51:47+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/overtone-demonstration/sssssgl9</loc>
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    <url>
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      <lastmod>2026-11-02T18:34:01+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/kite-proof-geometric-construction-and-angle-relations/sssssgle</loc>
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      <loc>https://www.mathplotai.com/zh/case/inner-parallelogram-construction/sssssgyn</loc>
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      <loc>https://www.mathplotai.com/zh/case/circle-on-the-45-degree-cone/sssssgyk</loc>
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      <lastmod>2026-11-02T02:25:15+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/tangent-plane-to-surface/sssssgyz</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-plane-to-surface/sssssgyz</loc>
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      <loc>https://www.mathplotai.com/zh/case/point-dilation-demo-by-ian-callon/sssssgy0</loc>
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      <loc>https://www.mathplotai.com/zh/case/peripheral-angle-bisector/sssssgyd</loc>
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      <loc>https://www.mathplotai.com/en/case/peripheral-angle-bisector/sssssgyd</loc>
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      <lastmod>2026-11-02T02:12:15+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/fraction-bars-fraction-tiles-with-text/sssssgyf</loc>
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      <loc>https://www.mathplotai.com/en/case/fraction-bars-fraction-tiles-with-text/sssssgyf</loc>
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      <lastmod>2026-11-02T16:52:17+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/friction-and-free-body-diagrams/sssssgy8</loc>
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      <lastmod>2026-11-02T13:36:52+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/friction-and-free-body-diagrams/sssssgy8</loc>
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      <lastmod>2026-11-02T13:36:52+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/solid-of-revolution/sssssgyu</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solid-of-revolution/sssssgyu"/>
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      <loc>https://www.mathplotai.com/zh/case/reflection-about-a-plane/sssssgy5</loc>
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      <lastmod>2026-11-02T18:40:16+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-about-a-plane/sssssgy5</loc>
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      <lastmod>2026-11-02T18:40:16+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/dynamic-quadrilateral-loci-race-track-model/sssssgyb</loc>
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      <lastmod>2026-11-01T19:26:55+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/dynamic-quadrilateral-loci-race-track-model/sssssgyb</loc>
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      <lastmod>2026-11-01T19:26:55+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-by-vectors/sssssgy3</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/translation-by-vectors/sssssgy3</loc>
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      <lastmod>2026-11-02T18:44:42+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/bar-fractions-visualizing-fractions-and-division-with-geometric-bars/sssssgyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bar-fractions-visualizing-fractions-and-division-with-geometric-bars/sssssgyq"/>
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      <lastmod>2026-11-01T20:54:05+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/bar-fractions-visualizing-fractions-and-division-with-geometric-bars/sssssgyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bar-fractions-visualizing-fractions-and-division-with-geometric-bars/sssssgyq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bar-fractions-visualizing-fractions-and-division-with-geometric-bars/sssssgyq"/>
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      <lastmod>2026-11-01T20:54:05+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/sine-and-cosine-animation-demo/sssssgy1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-animation-demo/sssssgy1"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-animation-demo/sssssgy1"/>
      <lastmod>2026-11-02T18:58:30+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/sine-and-cosine-animation-demo/sssssgy1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-animation-demo/sssssgy1"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-animation-demo/sssssgy1"/>
      <lastmod>2026-11-02T18:58:30+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/peaucellier-lipkin-linkage-straight-line-generator/sssssgym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/peaucellier-lipkin-linkage-straight-line-generator/sssssgym"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/peaucellier-lipkin-linkage-straight-line-generator/sssssgym"/>
      <lastmod>2026-11-01T21:22:04+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/peaucellier-lipkin-linkage-straight-line-generator/sssssgym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/peaucellier-lipkin-linkage-straight-line-generator/sssssgym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/peaucellier-lipkin-linkage-straight-line-generator/sssssgym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/peaucellier-lipkin-linkage-straight-line-generator/sssssgym"/>
      <lastmod>2026-11-01T21:22:04+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-diamond/sssssgyj</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-diamond/sssssgyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-diamond/sssssgyj"/>
      <lastmod>2026-11-02T03:10:12+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-diamond/sssssgyj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-diamond/sssssgyj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-diamond/sssssgyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-diamond/sssssgyj"/>
      <lastmod>2026-11-02T03:10:12+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-and-transformation-of-quadratic-functions/sssssgyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-transformation-of-quadratic-functions/sssssgyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-transformation-of-quadratic-functions/sssssgyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-transformation-of-quadratic-functions/sssssgyp"/>
      <lastmod>2026-11-02T18:05:14+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-and-transformation-of-quadratic-functions/sssssgyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-transformation-of-quadratic-functions/sssssgyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-transformation-of-quadratic-functions/sssssgyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-transformation-of-quadratic-functions/sssssgyp"/>
      <lastmod>2026-11-02T18:05:14+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/infinite-series-expansion/sssssgyw</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/infinite-series-expansion/sssssgyw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/infinite-series-expansion/sssssgyw"/>
      <lastmod>2026-11-01T19:18:14+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/infinite-series-expansion/sssssgyw</loc>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/infinite-series-expansion/sssssgyw"/>
      <lastmod>2026-11-01T19:18:14+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/geometry-lab-8-2-explore-trigonometric-ratios/sssssgy6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-lab-8-2-explore-trigonometric-ratios/sssssgy6"/>
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      <lastmod>2026-11-02T08:51:12+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/geometry-lab-8-2-explore-trigonometric-ratios/sssssgy6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-lab-8-2-explore-trigonometric-ratios/sssssgy6"/>
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      <lastmod>2026-11-02T08:51:12+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/small-angles-measured-in-radians/sssssgyg</loc>
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      <lastmod>2026-11-02T17:57:41+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/small-angles-measured-in-radians/sssssgyg</loc>
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      <lastmod>2026-11-02T17:57:41+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/sphere-vs-torus-topology/sssssgc6</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/butterfly-curve/sssssgc9</loc>
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      <lastmod>2026-11-01T19:04:40+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/p-q-and-r-defining-position-and-direction-vectors/sssssgce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p-q-and-r-defining-position-and-direction-vectors/sssssgce"/>
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      <lastmod>2026-11-02T02:28:45+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/p-q-and-r-defining-position-and-direction-vectors/sssssgce</loc>
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      <loc>https://www.mathplotai.com/zh/case/translations-of-lines-through-the-origin-tool/sssssgcv</loc>
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      <loc>https://www.mathplotai.com/en/case/translations-of-lines-through-the-origin-tool/sssssgcv</loc>
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      <loc>https://www.mathplotai.com/zh/case/discovering-properties-of-rhombuses/sssssgc4</loc>
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    <url>
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    <url>
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    <url>
      <loc>https://www.mathplotai.com/en/case/filling-the-sphere/sssssgcl</loc>
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      <lastmod>2026-11-01T23:54:59+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/area-calculation-using-distributive-property-lesson-12/sssssgcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-calculation-using-distributive-property-lesson-12/sssssgcy"/>
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      <lastmod>2026-11-02T15:52:48+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/area-calculation-using-distributive-property-lesson-12/sssssgcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-calculation-using-distributive-property-lesson-12/sssssgcy"/>
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      <lastmod>2026-11-02T15:52:48+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone-by-sudeep-gokarakonda/sssssgca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-sudeep-gokarakonda/sssssgca"/>
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      <lastmod>2026-11-02T00:22:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cone-by-sudeep-gokarakonda/sssssgca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-sudeep-gokarakonda/sssssgca"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-sudeep-gokarakonda/sssssgca"/>
      <lastmod>2026-11-02T00:22:44+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/variations-of-a-function-interactive-tangent-and-normal-constructions/sssssgcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variations-of-a-function-interactive-tangent-and-normal-constructions/sssssgcc"/>
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      <lastmod>2026-11-01T19:23:30+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/variations-of-a-function-interactive-tangent-and-normal-constructions/sssssgcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variations-of-a-function-interactive-tangent-and-normal-constructions/sssssgcc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variations-of-a-function-interactive-tangent-and-normal-constructions/sssssgcc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variations-of-a-function-interactive-tangent-and-normal-constructions/sssssgcc"/>
      <lastmod>2026-11-01T19:23:30+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/planes-and-geometric-construction/sssssgcr</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-and-geometric-construction/sssssgcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-and-geometric-construction/sssssgcr"/>
      <lastmod>2026-11-02T18:14:16+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/planes-and-geometric-construction/sssssgcr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-and-geometric-construction/sssssgcr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-and-geometric-construction/sssssgcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-and-geometric-construction/sssssgcr"/>
      <lastmod>2026-11-02T18:14:16+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/gogeometry-action-6-dynamic-geometry-and-calculus-integration/sssssgch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-6-dynamic-geometry-and-calculus-integration/sssssgch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gogeometry-action-6-dynamic-geometry-and-calculus-integration/sssssgch"/>
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      <lastmod>2026-11-02T11:06:15+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/gogeometry-action-6-dynamic-geometry-and-calculus-integration/sssssgch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-6-dynamic-geometry-and-calculus-integration/sssssgch"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gogeometry-action-6-dynamic-geometry-and-calculus-integration/sssssgch"/>
      <lastmod>2026-11-02T11:06:15+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-off-round-surface-example-2/sssssgct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-off-round-surface-example-2/sssssgct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-off-round-surface-example-2/sssssgct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-off-round-surface-example-2/sssssgct"/>
      <lastmod>2026-11-01T23:49:02+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-off-round-surface-example-2/sssssgct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-off-round-surface-example-2/sssssgct"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-off-round-surface-example-2/sssssgct"/>
      <lastmod>2026-11-01T23:49:02+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-area-of-rhombus/sssssgcx</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-area-of-rhombus/sssssgcx"/>
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      <lastmod>2026-11-02T06:16:21+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-area-of-rhombus/sssssgcx</loc>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-area-of-rhombus/sssssgcx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-area-of-rhombus/sssssgcx"/>
      <lastmod>2026-11-02T06:16:21+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-hyperbola-by-hgraber26/sssssgci</loc>
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      <lastmod>2026-11-02T18:40:10+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-hyperbola-by-hgraber26/sssssgci</loc>
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      <lastmod>2026-11-02T18:40:10+00:00</lastmod>
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    <url>
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      <lastmod>2026-11-01T21:38:48+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/area-of-parallelograms-by-anthony-or/sssssgrb</loc>
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      <lastmod>2026-11-01T23:56:44+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/area-of-parallelograms-by-anthony-or/sssssgrb</loc>
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      <lastmod>2026-11-01T23:56:44+00:00</lastmod>
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      <lastmod>2026-11-02T18:08:09+00:00</lastmod>
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      <lastmod>2026-11-02T18:08:09+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/y-over-x-views-ratio-based-geometric-and-set-exploration/sssssgrq</loc>
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      <lastmod>2026-11-01T19:13:38+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/optical-illusion-squares-generating-a-fractal/sssssgr1</loc>
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      <lastmod>2026-11-02T00:41:40+00:00</lastmod>
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      <lastmod>2026-11-02T00:41:40+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/angle-bisector-intersection-and-cyclic-quadrilateral/sssssgrm</loc>
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      <lastmod>2026-11-01T21:14:32+00:00</lastmod>
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      <lastmod>2026-11-01T21:14:32+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/logo-pau-gasol-geometric-construction/sssssgrt</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/rotate-triangles/sssssgro</loc>
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      <loc>https://www.mathplotai.com/zh/case/practice-linear-equations/sssssghs</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/practice-linear-equations/sssssghs</loc>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-geometry-construction/sssssgh7</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/kite-geometry-construction/sssssgh7</loc>
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      <loc>https://www.mathplotai.com/zh/case/beads-on-a-string-vibrations/sssssghn</loc>
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      <loc>https://www.mathplotai.com/en/case/beads-on-a-string-vibrations/sssssghn</loc>
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      <loc>https://www.mathplotai.com/zh/case/paper-folding-roots-with-parabola/sssssgh2</loc>
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      <loc>https://www.mathplotai.com/en/case/paper-folding-roots-with-parabola/sssssgh2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paper-folding-roots-with-parabola/sssssgh2"/>
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    <url>
      <loc>https://www.mathplotai.com/en/case/taxicab-distance-triangles/sssssgh0</loc>
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      <lastmod>2026-11-02T18:29:19+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-with-incircle/sssssghd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-with-incircle/sssssghd"/>
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    <url>
      <loc>https://www.mathplotai.com/en/case/translation-polygon/sssssghf</loc>
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      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-equal-areas/sssssgh8</loc>
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      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-equal-areas/sssssgh8</loc>
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      <lastmod>2026-11-02T17:17:31+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/congruent-triangles-by-mrs-dunn/sssssghu</loc>
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      <loc>https://www.mathplotai.com/en/case/congruent-triangles-by-mrs-dunn/sssssghu</loc>
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      <lastmod>2026-11-02T00:31:50+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/h-kite-geometry-report-circles-tangents-polygons-and-limits/sssssgh5</loc>
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      <lastmod>2026-11-01T20:56:27+00:00</lastmod>
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      <lastmod>2026-11-01T20:56:27+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/bernoulli-s-lemniscate-formed-from-an-isosceles-trapezoid/sssssghb</loc>
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      <lastmod>2026-11-02T18:31:46+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/bernoulli-s-lemniscate-formed-from-an-isosceles-trapezoid/sssssghb</loc>
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      <lastmod>2026-11-02T18:31:46+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/air-temperature-vs-altitude/sssssghq</loc>
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    <url>
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      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-surfaces/sssssgtb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-surfaces/sssssgtb"/>
      <lastmod>2026-11-01T23:26:22+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangles-and-circles/sssssgt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-and-circles/sssssgt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-and-circles/sssssgt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-and-circles/sssssgt3"/>
      <lastmod>2026-11-02T17:09:33+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangles-and-circles/sssssgt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-and-circles/sssssgt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-and-circles/sssssgt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-and-circles/sssssgt3"/>
      <lastmod>2026-11-02T17:09:33+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/translating-by-a-vector/sssssgtq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-by-a-vector/sssssgtq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-by-a-vector/sssssgtq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-by-a-vector/sssssgtq"/>
      <lastmod>2026-11-02T03:00:08+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/translating-by-a-vector/sssssgtq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-by-a-vector/sssssgtq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-by-a-vector/sssssgtq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-by-a-vector/sssssgtq"/>
      <lastmod>2026-11-02T03:00:08+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/cool-pyramid-design/sssssgt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cool-pyramid-design/sssssgt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cool-pyramid-design/sssssgt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cool-pyramid-design/sssssgt1"/>
      <lastmod>2026-11-02T17:47:54+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/cool-pyramid-design/sssssgt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cool-pyramid-design/sssssgt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cool-pyramid-design/sssssgt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cool-pyramid-design/sssssgt1"/>
      <lastmod>2026-11-02T17:47:54+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/a-translation-and-a-translation-sequential-polygon-translation/sssssgtm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-translation-and-a-translation-sequential-polygon-translation/sssssgtm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-translation-and-a-translation-sequential-polygon-translation/sssssgtm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-translation-and-a-translation-sequential-polygon-translation/sssssgtm"/>
      <lastmod>2026-11-02T15:46:51+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/a-translation-and-a-translation-sequential-polygon-translation/sssssgtm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-translation-and-a-translation-sequential-polygon-translation/sssssgtm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-translation-and-a-translation-sequential-polygon-translation/sssssgtm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-translation-and-a-translation-sequential-polygon-translation/sssssgtm"/>
      <lastmod>2026-11-02T15:46:51+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/different-views-of-the-same-fraction-visualizing-fractions-with-geometric-const/sssssgtj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-views-of-the-same-fraction-visualizing-fractions-with-geometric-const/sssssgtj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-views-of-the-same-fraction-visualizing-fractions-with-geometric-const/sssssgtj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-views-of-the-same-fraction-visualizing-fractions-with-geometric-const/sssssgtj"/>
      <lastmod>2026-11-01T19:21:27+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/different-views-of-the-same-fraction-visualizing-fractions-with-geometric-const/sssssgtj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-views-of-the-same-fraction-visualizing-fractions-with-geometric-const/sssssgtj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-views-of-the-same-fraction-visualizing-fractions-with-geometric-const/sssssgtj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-views-of-the-same-fraction-visualizing-fractions-with-geometric-const/sssssgtj"/>
      <lastmod>2026-11-01T19:21:27+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/chasing-segments-on-a-cube/sssssgtp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chasing-segments-on-a-cube/sssssgtp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chasing-segments-on-a-cube/sssssgtp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chasing-segments-on-a-cube/sssssgtp"/>
      <lastmod>2026-11-01T23:09:01+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/chasing-segments-on-a-cube/sssssgtp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chasing-segments-on-a-cube/sssssgtp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chasing-segments-on-a-cube/sssssgtp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chasing-segments-on-a-cube/sssssgtp"/>
      <lastmod>2026-11-01T23:09:01+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/im-8-7-5-practice-negative-exponents-with-powers-of-10/sssssgtw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-7-5-practice-negative-exponents-with-powers-of-10/sssssgtw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-7-5-practice-negative-exponents-with-powers-of-10/sssssgtw"/>
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      <lastmod>2026-11-01T20:14:03+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/im-8-7-5-practice-negative-exponents-with-powers-of-10/sssssgtw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-7-5-practice-negative-exponents-with-powers-of-10/sssssgtw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-7-5-practice-negative-exponents-with-powers-of-10/sssssgtw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-7-5-practice-negative-exponents-with-powers-of-10/sssssgtw"/>
      <lastmod>2026-11-01T20:14:03+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/visual-multiplication-ii/sssssgt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-multiplication-ii/sssssgt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-multiplication-ii/sssssgt6"/>
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      <lastmod>2026-11-02T00:55:01+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/visual-multiplication-ii/sssssgt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-multiplication-ii/sssssgt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-multiplication-ii/sssssgt6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-multiplication-ii/sssssgt6"/>
      <lastmod>2026-11-02T00:55:01+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/minimum-spanning-tree-algorithm-demo/sssssgtg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/minimum-spanning-tree-algorithm-demo/sssssgtg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/minimum-spanning-tree-algorithm-demo/sssssgtg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/minimum-spanning-tree-algorithm-demo/sssssgtg"/>
      <lastmod>2026-11-02T00:41:03+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/minimum-spanning-tree-algorithm-demo/sssssgtg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/minimum-spanning-tree-algorithm-demo/sssssgtg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/minimum-spanning-tree-algorithm-demo/sssssgtg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/minimum-spanning-tree-algorithm-demo/sssssgtg"/>
      <lastmod>2026-11-02T00:41:03+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-diagonal-lines/sssssgt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-diagonal-lines/sssssgt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-diagonal-lines/sssssgt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-diagonal-lines/sssssgt9"/>
      <lastmod>2026-11-01T23:35:55+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-diagonal-lines/sssssgt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-diagonal-lines/sssssgt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-diagonal-lines/sssssgt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-diagonal-lines/sssssgt9"/>
      <lastmod>2026-11-01T23:35:55+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/viviani-curve-by-wuguoning-2/sssssgte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/viviani-curve-by-wuguoning-2/sssssgte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/viviani-curve-by-wuguoning-2/sssssgte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/viviani-curve-by-wuguoning-2/sssssgte"/>
      <lastmod>2026-11-01T19:17:50+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/viviani-curve-by-wuguoning-2/sssssgte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/viviani-curve-by-wuguoning-2/sssssgte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/viviani-curve-by-wuguoning-2/sssssgte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/viviani-curve-by-wuguoning-2/sssssgte"/>
      <lastmod>2026-11-01T19:17:50+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/estimating-surface-area/sssssgtv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-surface-area/sssssgtv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-surface-area/sssssgtv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-surface-area/sssssgtv"/>
      <lastmod>2026-11-02T18:15:00+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/estimating-surface-area/sssssgtv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-surface-area/sssssgtv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-surface-area/sssssgtv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-surface-area/sssssgtv"/>
      <lastmod>2026-11-02T18:15:00+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-of-complex-roots-of-a-quadratic/sssssgt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-complex-roots-of-a-quadratic/sssssgt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-complex-roots-of-a-quadratic/sssssgt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-complex-roots-of-a-quadratic/sssssgt4"/>
      <lastmod>2026-11-01T20:55:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-of-complex-roots-of-a-quadratic/sssssgt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-complex-roots-of-a-quadratic/sssssgt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-complex-roots-of-a-quadratic/sssssgt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-complex-roots-of-a-quadratic/sssssgt4"/>
      <lastmod>2026-11-01T20:55:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-absolute-value-functions-transformations/sssssgtl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-absolute-value-functions-transformations/sssssgtl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-absolute-value-functions-transformations/sssssgtl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-absolute-value-functions-transformations/sssssgtl"/>
      <lastmod>2026-11-02T07:02:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-absolute-value-functions-transformations/sssssgtl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-absolute-value-functions-transformations/sssssgtl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-absolute-value-functions-transformations/sssssgtl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-absolute-value-functions-transformations/sssssgtl"/>
      <lastmod>2026-11-02T07:02:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-of-x-x-3-2/sssssgty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-x-x-3-2/sssssgty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-x-x-3-2/sssssgty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-x-x-3-2/sssssgty"/>
      <lastmod>2026-11-02T17:39:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-of-x-x-3-2/sssssgty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-x-x-3-2/sssssgty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-x-x-3-2/sssssgty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-x-x-3-2/sssssgty"/>
      <lastmod>2026-11-02T17:39:51+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-prism-net/sssssgta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-prism-net/sssssgta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-prism-net/sssssgta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-prism-net/sssssgta"/>
      <lastmod>2026-11-02T00:16:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-prism-net/sssssgta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-prism-net/sssssgta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-prism-net/sssssgta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-prism-net/sssssgta"/>
      <lastmod>2026-11-02T00:16:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-by-mbranson/sssssgtc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-by-mbranson/sssssgtc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-by-mbranson/sssssgtc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-by-mbranson/sssssgtc"/>
      <lastmod>2026-11-01T21:22:16+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-by-mbranson/sssssgtc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-by-mbranson/sssssgtc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-by-mbranson/sssssgtc"/>
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      <loc>https://www.mathplotai.com/zh/case/center-of-rotation-by-mbranson/sssssgxu</loc>
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      <loc>https://www.mathplotai.com/zh/case/congruent-triangles-7-naming-with-reasons/sssssgxe</loc>
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      <loc>https://www.mathplotai.com/en/case/congruent-triangles-7-naming-with-reasons/sssssgxe</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/two-circles-touching-once/sssssgxv</loc>
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      <loc>https://www.mathplotai.com/zh/case/scientific-notation-to-decimal-form-question-generator/sssssgx4</loc>
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      <loc>https://www.mathplotai.com/en/case/scientific-notation-to-decimal-form-question-generator/sssssgx4</loc>
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      <loc>https://www.mathplotai.com/zh/case/heart-generated-with-parametric-equations/sssssgxl</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/rectangles-on-triangle/sssssgim</loc>
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      <lastmod>2026-11-02T18:07:41+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-cone-construction/sssssgij</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-cone-construction/sssssgij</loc>
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      <lastmod>2026-11-02T15:53:39+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/perspective-of-annunciation/sssssgip</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/perspective-of-annunciation/sssssgip</loc>
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      <lastmod>2026-11-02T02:45:45+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/cylinder-surface-area-calculation-by-katie-davidson/sssssgiw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-calculation-by-katie-davidson/sssssgiw"/>
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      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-calculation-by-katie-davidson/sssssgiw"/>
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      <lastmod>2026-11-02T18:19:40+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/cards-distribution-for-probability/sssssgi6</loc>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-of-tiles/sssssgig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-of-tiles/sssssgig"/>
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      <lastmod>2026-11-01T23:11:50+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/angles-of-tiles/sssssgig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-of-tiles/sssssgig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-of-tiles/sssssgig"/>
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      <lastmod>2026-11-01T23:11:50+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/interactive-definition-of-regular-polygons/sssssgi9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-definition-of-regular-polygons/sssssgi9"/>
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      <lastmod>2026-11-02T13:29:21+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-definition-of-regular-polygons/sssssgi9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-definition-of-regular-polygons/sssssgi9"/>
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      <lastmod>2026-11-02T13:29:21+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-prism/sssssgie</loc>
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      <lastmod>2026-11-01T23:34:48+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-prism/sssssgie</loc>
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      <lastmod>2026-11-01T23:34:48+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-assessment/sssssgiv</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/vector-assessment/sssssgiv</loc>
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      <lastmod>2026-11-01T21:25:18+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-construction-example-by-caner/sssssgi4</loc>
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      <loc>https://www.mathplotai.com/zh/case/volumes-of-revolution-demonstration/sssss9s0</loc>
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      <lastmod>2026-11-02T18:59:24+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/multiplying-by-numbers-using-vectors/sssss9s8</loc>
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      <loc>https://www.mathplotai.com/en/case/multiplying-by-numbers-using-vectors/sssss9s8</loc>
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      <lastmod>2026-11-02T00:51:22+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/spiral-art-sphere-and-geometric-transformations/sssss9su</loc>
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      <loc>https://www.mathplotai.com/en/case/spiral-art-sphere-and-geometric-transformations/sssss9su</loc>
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      <lastmod>2026-11-01T22:03:00+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/line-intersect-sphere/sssss9s5</loc>
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      <lastmod>2026-11-02T11:46:07+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/line-intersect-sphere/sssss9s5</loc>
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      <lastmod>2026-11-02T11:46:07+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/geostix-demonstration-in-geogebra/sssss9sb</loc>
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      <loc>https://www.mathplotai.com/en/case/geostix-demonstration-in-geogebra/sssss9sb</loc>
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      <lastmod>2026-11-01T21:05:41+00:00</lastmod>
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      <lastmod>2026-11-01T22:03:46+00:00</lastmod>
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      <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/sssss9s3"/>
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      <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/sssss9s3"/>
      <lastmod>2026-11-01T22:03:46+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-score-comparisons/sssss9sq</loc>
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      <lastmod>2026-11-02T03:02:12+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/standard-score-comparisons/sssss9sq</loc>
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      <lastmod>2026-11-02T03:02:12+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/dandelin-spheres-demo-by-cindy-cortez/sssss9s1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dandelin-spheres-demo-by-cindy-cortez/sssss9s1"/>
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      <lastmod>2026-11-01T21:05:32+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/dandelin-spheres-demo-by-cindy-cortez/sssss9s1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dandelin-spheres-demo-by-cindy-cortez/sssss9s1"/>
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      <lastmod>2026-11-01T21:05:32+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-and-cosine-graphs/sssss9sm</loc>
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      <lastmod>2026-11-01T23:53:00+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/sine-and-cosine-graphs/sssss9sm</loc>
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      <lastmod>2026-11-01T23:53:00+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/exact-quartic-through-9-points-geogebra-example/sssss9sj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-quartic-through-9-points-geogebra-example/sssss9sj"/>
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      <lastmod>2026-11-02T02:29:31+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/exact-quartic-through-9-points-geogebra-example/sssss9sj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-quartic-through-9-points-geogebra-example/sssss9sj"/>
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      <lastmod>2026-11-02T02:29:31+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/unmessupable-rhombus/sssss9sp</loc>
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      <lastmod>2026-11-02T03:03:56+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/unmessupable-rhombus/sssss9sp</loc>
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      <lastmod>2026-11-02T03:03:56+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/incircle-extension-2-gogeometry-action-133/sssss9sw</loc>
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      <lastmod>2026-11-02T15:35:34+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/incircle-extension-2-gogeometry-action-133/sssss9sw</loc>
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      <lastmod>2026-11-02T15:35:34+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisectors-and-angles/sssss9s6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-and-angles/sssss9s6"/>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-and-angles/sssss9s6"/>
      <lastmod>2026-11-02T18:58:35+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisectors-and-angles/sssss9s6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-and-angles/sssss9s6"/>
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      <lastmod>2026-11-02T18:58:35+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-two-cylinders-parametric-construction/sssss9sg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-cylinders-parametric-construction/sssss9sg"/>
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      <lastmod>2026-11-02T17:40:12+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-two-cylinders-parametric-construction/sssss9sg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-cylinders-parametric-construction/sssss9sg"/>
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      <lastmod>2026-11-02T17:40:12+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-postulates/sssss9s9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-postulates/sssss9s9"/>
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      <lastmod>2026-11-01T21:53:11+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-with-area-model/sssss9n1</loc>
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      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-with-area-model/sssss9n1</loc>
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      <loc>https://www.mathplotai.com/zh/case/foreign-born-residents-histogram/sssss9nm</loc>
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      <loc>https://www.mathplotai.com/en/case/foreign-born-residents-histogram/sssss9nm</loc>
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      <lastmod>2026-11-02T09:46:42+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/ns1-02-xt1-product-of-powers/sssss92i</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/ns1-02-xt1-product-of-powers/sssss92i</loc>
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      <loc>https://www.mathplotai.com/zh/case/triangle-interior-angle-sum-demonstration/sssss92o</loc>
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      <loc>https://www.mathplotai.com/en/case/triangle-interior-angle-sum-demonstration/sssss92o</loc>
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      <loc>https://www.mathplotai.com/zh/case/11-nets-of-a-cube-by-gunther-van-den-berghe/sssss9ks</loc>
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      <loc>https://www.mathplotai.com/en/case/11-nets-of-a-cube-by-gunther-van-den-berghe/sssss9ks</loc>
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      <loc>https://www.mathplotai.com/zh/case/interactive-logarithm-and-exponent-demonstration/sssss9k7</loc>
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      <loc>https://www.mathplotai.com/en/case/interactive-logarithm-and-exponent-demonstration/sssss9k7</loc>
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      <loc>https://www.mathplotai.com/zh/case/cross-section-of-a-square-pyramid-by-steve-phelps/sssss9kn</loc>
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      <loc>https://www.mathplotai.com/zh/case/3d-three-fold-umbrella/sssss9kk</loc>
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      <loc>https://www.mathplotai.com/en/case/3d-three-fold-umbrella/sssss9kk</loc>
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      <loc>https://www.mathplotai.com/zh/case/multiplying-two-fractions-interactive-visualization/sssss9kz</loc>
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      <loc>https://www.mathplotai.com/en/case/multiplying-two-fractions-interactive-visualization/sssss9kz</loc>
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      <loc>https://www.mathplotai.com/en/case/cut-the-knot-action-19-dynamic-exploration-of-quadrilaterals-and-quadratic-equa/sssss9k0</loc>
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      <lastmod>2026-11-02T17:50:08+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/bezier-surface-parametric-surface-construction-via-control-point-grid/sssss9kd</loc>
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      <loc>https://www.mathplotai.com/en/case/bezier-surface-parametric-surface-construction-via-control-point-grid/sssss9kd</loc>
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      <lastmod>2026-11-02T17:03:37+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/vector-example-33/sssss9kf</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/vector-example-33/sssss9kf</loc>
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      <lastmod>2026-11-01T21:34:36+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/when-is-too-much-overlap-too-much-two-distributions/sssss9k8</loc>
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      <lastmod>2026-11-02T18:26:12+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-special-quadrilateral/sssss9ku</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-special-quadrilateral/sssss9ku</loc>
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      <loc>https://www.mathplotai.com/zh/case/reflection-practice-by-berthier/sssss9k5</loc>
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      <loc>https://www.mathplotai.com/en/case/reflection-practice-by-berthier/sssss9k5</loc>
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      <loc>https://www.mathplotai.com/zh/case/line/sssss9kb</loc>
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      <lastmod>2026-11-02T18:50:43+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-translation-demonstration/sssss9z3</loc>
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      <loc>https://www.mathplotai.com/zh/case/parabola-through-three-points/sssss9zq</loc>
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      <loc>https://www.mathplotai.com/en/case/parabola-through-three-points/sssss9zq</loc>
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      <loc>https://www.mathplotai.com/zh/case/tangent-vectors-visualization-on-polynomial-curves/sssss9z1</loc>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/7-applications-of-forces/sssss9zm</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/7-applications-of-forces/sssss9zm</loc>
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      <lastmod>2026-11-02T18:31:17+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/conjecturing-about-inscribed-angles-of-circles/sssss9zj</loc>
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      <lastmod>2026-11-01T20:51:54+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/conjecturing-about-inscribed-angles-of-circles/sssss9zj</loc>
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      <lastmod>2026-11-01T20:51:54+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/proof-without-words-geometric-interpretation-of-fraction-division/sssss9zp</loc>
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      <lastmod>2026-11-01T19:22:19+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/proof-without-words-geometric-interpretation-of-fraction-division/sssss9zp</loc>
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      <lastmod>2026-11-01T19:22:19+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/reflection-over-the-line-y-1/sssss9zw</loc>
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      <lastmod>2026-11-01T21:15:39+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/reflection-over-the-line-y-1/sssss9zw</loc>
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      <loc>https://www.mathplotai.com/zh/case/pentagram-and-various-appearances-of-the-golden-ratio/sssss9z6</loc>
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      <lastmod>2026-11-02T17:39:02+00:00</lastmod>
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      <lastmod>2026-11-02T17:39:02+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-with-diagonals/sssss9zg</loc>
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      <lastmod>2026-11-02T18:19:29+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-with-diagonals/sssss9zg</loc>
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      <lastmod>2026-11-02T18:19:29+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/advanced-unit-fractions-subdividing-fraction-units-with-geometric-transformatio/sssss9z9</loc>
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      <lastmod>2026-11-01T19:11:53+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/advanced-unit-fractions-subdividing-fraction-units-with-geometric-transformatio/sssss9z9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/advanced-unit-fractions-subdividing-fraction-units-with-geometric-transformatio/sssss9z9"/>
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      <lastmod>2026-11-01T19:11:53+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/odd-symmetry-demonstration/sssss9ze</loc>
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      <lastmod>2026-11-02T02:17:59+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/odd-symmetry-demonstration/sssss9ze</loc>
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      <lastmod>2026-11-02T02:17:59+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/sloped-cylinder-unfolding/sssss9zv</loc>
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      <lastmod>2026-11-02T09:14:26+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/sloped-cylinder-unfolding/sssss9zv</loc>
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      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sloped-cylinder-unfolding/sssss9zv"/>
      <lastmod>2026-11-02T09:14:26+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/pentagonal-net-with-double-ellipses-and-open-spheres/sssss9z4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagonal-net-with-double-ellipses-and-open-spheres/sssss9z4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagonal-net-with-double-ellipses-and-open-spheres/sssss9z4"/>
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      <lastmod>2026-11-02T07:12:28+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/pentagonal-net-with-double-ellipses-and-open-spheres/sssss9z4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagonal-net-with-double-ellipses-and-open-spheres/sssss9z4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagonal-net-with-double-ellipses-and-open-spheres/sssss9z4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagonal-net-with-double-ellipses-and-open-spheres/sssss9z4"/>
      <lastmod>2026-11-02T07:12:28+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-incenter-construction-and-properties/sssss9zl</loc>
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      <lastmod>2026-11-02T18:38:05+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-incenter-construction-and-properties/sssss9zl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-incenter-construction-and-properties/sssss9zl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-incenter-construction-and-properties/sssss9zl"/>
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      <lastmod>2026-11-02T18:38:05+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/curves-and-stationary-points/sssss9zy</loc>
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      <lastmod>2026-11-01T23:10:58+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/curves-and-stationary-points/sssss9zy</loc>
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      <lastmod>2026-11-01T23:10:58+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-and-road-signs/sssss9za</loc>
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      <lastmod>2026-11-01T23:42:17+00:00</lastmod>
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    <url>
      <loc>https://www.mathplotai.com/en/case/slope-and-road-signs/sssss9za</loc>
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      <lastmod>2026-11-01T23:42:17+00:00</lastmod>
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    <url>
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      <loc>https://www.mathplotai.com/en/case/trigonometric-ratio-graphs-from-the-unit-circle/sssss907</loc>
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    <url>
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    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-points-long-or-short/sssss90k</loc>
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      <lastmod>2026-11-01T21:32:35+00:00</lastmod>
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      <lastmod>2026-11-01T23:26:49+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/parallelogram-discovery-template/sssss90d</loc>
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    <url>
      <loc>https://www.mathplotai.com/en/case/tangram-v2/sssss90f</loc>
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      <loc>https://www.mathplotai.com/zh/case/exploring-scale-factor/sssss908</loc>
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      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisector-by-jkelly/sssss903</loc>
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      <lastmod>2026-11-01T19:30:32+00:00</lastmod>
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      <lastmod>2026-11-02T13:09:09+00:00</lastmod>
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    <url>
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    <url>
      <loc>https://www.mathplotai.com/en/case/bloch-sphere-template/sssss909</loc>
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      <loc>https://www.mathplotai.com/zh/case/irrational-numbers-pythagoras/sssss90e</loc>
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      <loc>https://www.mathplotai.com/en/case/irrational-numbers-pythagoras/sssss90e</loc>
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      <lastmod>2026-11-02T08:55:42+00:00</lastmod>
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      <loc>https://www.mathplotai.com/zh/case/explore-properties-of-tangents-to-a-circle/sssss90v</loc>
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      <lastmod>2026-11-01T21:45:05+00:00</lastmod>
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      <loc>https://www.mathplotai.com/en/case/explore-properties-of-tangents-to-a-circle/sssss90v</loc>
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