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滾動展開多邊形
Author:
陳隆期
GeoGebra
New Resources
異分母分數減法
錐體建築師
找出對稱軸
三位數除以一位數（二）
柱體建築師
Discover Resources
分段移動
正方形分割
Li Shan Lan Cone Pi
arithmetic operation
分割多边形
Discover Topics
Subtraction
Reflection
Tangent Line or Tangent
Hyperbola
Straight Lines