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三圓外切
Author:
AlexWang
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
找出對稱軸
兩位數除以一位數（二）
画直线等分三角形的面积
Discover Resources
正三角形在正方形圓直線上
定理7.1&7.2
三角函數值 (特別角)
运动
三角函數圖形（全）的副本
Discover Topics
Reflection
Inequalities
Exponent
Division
Numbers