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GeoGebra
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GeoGebra
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angles sum on a striaght line
Author:
LAM YU SANG
GeoGebra
New Resources
球體建築師
GeoGebra笔记功能体验课件
兩位數除以一位數（一）
三位數除以一位數（二）
画直线等分三角形的面积
Discover Resources
前景圖、背景圖
兩位小數
任意三角形外心與外接圓
對數函數
运动
Discover Topics
Geometry
Equations
Sphere
Boxplot
Unit Circle