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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
兩組對邊相等的四邊形
四邊形的特性
畫出對稱圖形
異分母分數減法
sanjiaohanshu
Discover Resources
河內塔 (Tower of Hanoi)
圓的內接四邊形
对数函数（表格文本效果）的副本
正餘弦函數的疊合
展開圓面積 (講義版)的副本
Discover Topics
Centroid or Barycenter
Arithmetic Mean
Vectors 2D (Two-Dimensional)
Inequalities
Orthocenter