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三圓外切
Author:
AlexWang
GeoGebra
New Resources
畫出對稱圖形
找出對稱軸
画直线等分三角形的面积
柱體建築師
兩位數除以一位數（二）
Discover Resources
Quiz on Angle between a Line and a Plane 線面角：測驗
座標上的定點軌跡圖
二年級-柱體的觀察
塗色02
固定周界長方形的面積變化（一）
Discover Topics
Power Functions
Limits
Histogram
Median Line
Angles