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Author:
朱亮
GeoGebra
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畫出對稱圖形
找出對稱軸
拼砌四邊形
【案例】2013年安徽高考15题
球体的体积推导（优化版）
Discover Resources
三角形的面積
等腰三角形內嵌矩形
謝爾賓斯基三角形(Sierpinsky)
Apollonius Problem 5 CPP pocelet
示例2
Discover Topics
Symmetry
Right Triangles
Parallelogram
Cuboid
Angles