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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
三位數除以一位數（一）
GeoGebra笔记功能体验课件
拼砌四邊形
四邊形的特性
兩位數除以一位數（一）
Discover Resources
文氏圖
判斷球體 3
probwei1
內輪差...
橢圓的定義
Discover Topics
Vectors 3D (Three-Dimensional)
Linear Programming or Linear Optimization
Pythagoras or Pythagorean Theorem
Equilateral Triangles
Probability