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S408 Penrose 階梯
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学用数学
GeoGebra
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長方體平面投影 (Codex版)
兩組對邊相等的四邊形
直角坐標平面上的旋轉變換
四邉形 (四年級) 教師版
美國國旗 (Claude 版)
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waaachen
task4
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平移法（四）
Copy of 固定面積的圖形的周界變化
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Intersection
Linear Equations
Probability
Cube
Constructions