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Copy of Triangular Number
Author:
Ronan Downes
,
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
兩位數除以一位數（二）
球体的体积推导（优化版）
找出對稱軸
拼砌四邊形
球體建築師
Discover Resources
小二、小三_時間（教師版）
proof24 羅文頡
聯立方程式
三角形的心
中心投影、平行投影
Discover Topics
Statistical Characteristics
Histogram
Vectors 3D (Three-Dimensional)
Surface
Vectors 2D (Two-Dimensional)