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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
画直线等分三角形的面积
畫出對稱圖形
球體建築師
錐體建築師
兩位數加法
Discover Resources
線對稱圖形練習1
塗鴉
Measuring Volume 3
畢氏定理完成20170330
橢圓2-四圓心近似法
Discover Topics
Normal Distribution
Constructions
Sine
Arithmetic Mean
Right Triangles