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菱形有甚麼特性？
Author:
Anthony OR 柯志明
English version:
http://ggbtu.be/m79847
GeoGebra
New Resources
兩組對邊相等的四邊形
找出對稱軸
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
GeoGebra笔记功能体验课件
Discover Resources
線性規劃
sin(x) 的函數圖形的副本
Copy of 倒數計時
分步骤展示作图过程样例
极值点方式求圆心
Discover Topics
Cuboid
Rational Numbers
Circumcircle or Circumscribed Circle
Functions
Means