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平行四邊形有甚麼特性？
Author:
Anthony OR 柯志明
Topic:
Parallelogram
English version:
http://ggbtu.be/m79826
GeoGebra
New Resources
錐體建築師
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
第八周作业
直角坐標平面上的旋轉變換
Discover Resources
人造「四腳獸」？
判斷柱體 8
物體的體積
Area between two curves
圖形的周界
Discover Topics
Real Numbers
Complex Numbers
Limits
Circle
Stochastic Process or Random Process