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Author:
Chenwei Chen
GeoGebra
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四邊形的特性
GeoGebra笔记功能体验课件
找出對稱軸
兩位數除以一位數（一）
拼砌四邊形
Discover Resources
Desargues 定理
生日悖論
奠基
与两圆都相切的动圆圆心的轨迹
动点最值&旋转&椭圆模型
Discover Topics
Similar Triangles
Plane Figures or Shapes
Intersection
Circumcircle or Circumscribed Circle
Isosceles Triangles