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迭代2
Author:
cl
GeoGebra
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多邊形的面積
讀磅
撒针估算面积实验
祖冲之的期望：内棋与外棋
龙形曲线-分形龙
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三角形的外心
長方形和正方形的面積_題A至E
P6 圓周02B
立體
碎形三角形
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Rectangle
Surface
Arithmetic Operations
Equilateral Triangles
Integers