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正方形和長方形有甚麼特性？
Author:
Anthony OR 柯志明
Eng version:
http://ggbtu.be/m79823
GeoGebra
New Resources
異分母分數減法
球體建築師
GeoGebra笔记功能体验课件
三位數除以一位數（一）
錐體建築師
Discover Resources
商高定理之正三角形2
類尺規作圖
極座標
Larry's Clock
黎曼和(Riemann Sum)
Discover Topics
Unit Circle
Exponential Functions
Polynomial Functions
Planes
Arithmetic Operations