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小数点爱数学
GeoGebra
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湖南省张毅郴数字教研工作室 logo
伊朗國旗 (Codex╱2026.10.07)
算柱 (兩位數)
近似值：有效數字
Nested spiral octagon
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閱讀鐘面及數字鐘（時和分）
點之極線定理 / polar of a point theorem
平面族
Text sequence
試算表畫纏繞畫
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Matrices
Geometric Transformations
Functions
Pyramid
Planes