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中華民國國旗
Author:
侯杰材
GeoGebra
New Resources
畫出對稱圖形
三位數除以一位數（二）
画直线等分三角形的面积
錐體建築師
判斷球體
Discover Resources
以量角器量度角
同心圓
单晨答图霸湖北李光荣
Triangle
三视图
Discover Topics
Orthocenter
Geometric Mean
Tangent Function
Isosceles Triangles
Quadrilaterals