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錯角---水平平行綫
Author:
chanfushun
GeoGebra
New Resources
圓的基本性質
双心四边形
三角函数 的副本
直線的斜率
画直线等分三角形的面积
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畢達哥拉斯定理
有向角
Angle between Plane and Plane
第4課
S3 WS4.3 Q02(3D圖)
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Boxplot
Matrices
Derivative
Addition
Angles