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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
柱體建築師
兩位數加法
兩組對邊相等和有直角的四邊形
拼砌四邊形
判斷球體
Discover Resources
乘法表的自动练习
優良作品2(怡雯)
軌跡方程式-弦中點
Copy of 固定周界的長方形的面積變化
数线段
Discover Topics
Sine
Sphere
Tangent Function
Geometric Transformations
Congruence