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动动你的手，4=π吗 ?
Author:
代国兴
GeoGebra
New Resources
拼砌四邊形
畫出對稱圖形
GeoGebra笔记功能体验课件
找出對稱軸
兩位數除以一位數（二）
Discover Resources
垂直平分線
Copy of 長方形與正方形的面積
橢圓
工具：PlaneArrows, PlaneText... (v.2)
手拉手模型
Discover Topics
Percentages
Rhombus
Real Numbers
Limits
Equilateral Triangles