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Equation of the tangent to 2 circles touching externally
Author:
jleung
GeoGebra
New Resources
比較五件物件的重量
平行線的判定
直線的斜率：水平變化 & 鉛垂變化
折扣
活动三：应用性质
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二次函數面積練習
三角形外心的角度關係
指数函数的副本
直角坐標的旋轉變換
Copy of 二面角
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Orthocenter
Sequences and Series
Limits
General Quadrilateral
Arithmetic Operations