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Rectangle
Author:
karin0022
GeoGebra
New Resources
三位數除以一位數（一）
【案例】2013年安徽高考15题
錐體建築師
畫出對稱圖形
兩組對邊相等的四邊形
Discover Resources
http://www.qsir.org/?p=8853
數值滑桿
Plane
angles in the same segment
圆锥曲线折纸操作题（教材案例）
Discover Topics
Solids or 3D Shapes
Combinatorics
Complex Numbers
Secant Line or Secant
Perimeter