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Triangular Number 三角形數
Author:
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.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）
GeoGebra笔记功能体验课件
算柱 (兩位數)
Discover Resources
perimeter
Ex5D#9
基础知识
根據百分率找數量（二）: 例2的副本
圆锥侧面展开图
Discover Topics
Statistical Characteristics
Fractal Geometry
Area
Upper and Lower Sum or Riemann Sum
Exponent