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Quiz on Centres of Triangles 三角形的中心：測驗
Author:
Alex CHIK
GeoGebra
gMath 互動數學教室
http://www.gmath.hk
New Resources
找出對稱軸
【案例】圆柱体内放置一个大球六个小球
三位數除以一位數（二）
兩位數除以一位數（一）
錐體建築師
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前景圖、背景圖
Classification of Triangles 三角形的分類
雙曲線的軌跡
Geometric Circle
Multiplication of Directed Numbers
Discover Topics
Sphere
Standard Deviation
Integers
Functions
Trapezoid