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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
四邉形 (四年級) 教師版
判斷球體
球體建築師
球体的体积推导（优化版）
球体的体积推导
Discover Resources
解題的結果
three
Area of triangle with different base
圖I
单晨正方形在正六边形内部滚动的课件
Discover Topics
Arithmetic Mean
Limits
Power Functions
Differential Calculus
Centroid or Barycenter