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眼睛的毛病(近視及遠視)
Author:
Kenneth
GeoGebra
New Resources
三位數除以一位數（一）
拼砌四邊形
找出對稱軸
【案例】2013年安徽高考15题
畫出對稱圖形
Discover Resources
Ratio of angles at the centre and the length of the arcs.
分數認識
黃金三角形
橢圓1--同心圓法
点到双曲线的切线方程
Discover Topics
Vectors 2D (Two-Dimensional)
Incircle or Inscribed Circle
Fractal Geometry
Cube
Derivative