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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
画直线等分三角形的面积
畫出對稱圖形
GeoGebra笔记功能体验课件
兩位數除以一位數（一）
柱體建築師
Discover Resources
四邊形 (2001 舊課程教師版)
Geometric Circle
立體 - 方位角及仰角
怪函數之3
二重积分
Discover Topics
Line Segment
LCM and GCD
Integral Calculus
Integers
Straight Lines