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梯形有甚麼特性？
Author:
Anthony OR 柯志明
English version:
http://ggbtu.be/m79855
GeoGebra
New Resources
找出對稱軸
兩位數加法
異分母分數減法
球体的体积推导
三位數除以一位數（一）
Discover Resources
數學4其他圖
向量相加
救生員的職責
圖解直式開方
【物理】引力波
Discover Topics
Geometric Distribution
Conditional Probability
Parabola
Optimization Problems
Expected Value