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Unrolling a circle 的副本
Author:
Nina Wang
GeoGebra
New Resources
兩位數加法
三位數除以一位數（一）
【案例】2013年安徽高考15题
柱體建築師
兩組對邊相等的四邊形
Discover Resources
Angle at Centre Twice Angle at Circumference
軌跡四︰移動點與一固定直線保持固定距離(兩平行線)
立體圖
Similar triangles inscribed iteration
探究棱錐的體積
Discover Topics
Area
Constructions
Kite
Perimeter
Continuity