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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
異分母分數減法
錐體建築師
判斷球體
兩位數加法
找出對稱軸
Discover Resources
Reference Angle 參考角
阿波羅尼亞圓
How to draw an octagon with ruler and compasses?
sin 的泰勒展開式
拋物線五-包絡線法
Discover Topics
Incircle or Inscribed Circle
General Quadrilateral
Integers
Isosceles Triangles
Terms