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三角形外心的角度關係
Author:
均一
GeoGebra
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直線的斜率：水平變化 & 鉛垂變化
比較五件物件的重量
活动三：应用性质
平行線的判定
三角函数 的副本
Discover Resources
cos(x) 的圖形
分數與小數
Area between two curves
旁心
橢圓1--同心圓法
Discover Topics
Special Points
Linear Equations
Intersection
Fractal Geometry
Median Line