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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
近似值：有效數字
算柱 (兩位數)
異分母分數減法
第八周作业
GeoGebra笔记功能体验课件
Discover Resources
http://www.qsir.org/?p=8853
直線與圓的位置關係
三角形分割
圓柱曲面
正三角形在长方形边上移动加滚动
Discover Topics
Exponent
Planes
Cylinder
Function Graph
Kite