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angles sum of a triangle 3
Author:
LAM YU SANG
GeoGebra
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圓的基本性質
撒针估算面积实验
垂直線的斜率
科氏力 (Coriolis Force)
平行線的斜率
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商高定理\水
箏形
二次函數描點
正方形旋转夹脚45_原题
正方体表面积11种展开图
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Random Experiments
Hypergeometric Distribution
Real Numbers
Indefinite Integral
Cone