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正4正8黏合v2
Author:
Wu Xiao-Ren
GeoGebra
New Resources
异形操场
活动三:应用性质
椭圆内切圆链
折扣
中华人民共和国国旗
Discover Resources
計算減法
circle
畢氏三元數
面積
Copy of 劉徽的「割圓術」
Discover Topics
Volume
Means
Symmetry
Mathematics
Angles