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数学勾股定理
Author:
xuhao
GeoGebra
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兩位數加法
找出對稱軸
直角坐標平面上的旋轉變換
三位數除以一位數（二）
算柱 (兩位數)
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圓周角與圓心角的關係
聖者即正義
三角形的构成的副本
折正五邊形
勾股定理证明2
Discover Topics
Vectors
Geometric Distribution
Geometric Transformations
Difference and Slope
Confidence Interval