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圓外切及內切
Author:
luke huang
New Resources
平行四边形平移
等邊三角形
四面体棱锥外接球
旋转一
Cylinder-1
Discover Resources
方格紙上畫平行四邊形4
菱形的特性
Locus
畢氏定理證明（Ｉ）
龜甲
Discover Topics
Constructions
Boxplot
Cube
Intersection
Prism
