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兩圓內外公切線
Author:
AlexWang
GeoGebra
New Resources
兩位數加法
讀磅
直線的斜率
【案例】2013年安徽高考15题
祖冲之的期望：内棋与外棋
Discover Resources
圓周 (圖形B)
四邊形內多個四邊型旋轉
Rotation in the Coordinate Plane
三角形的分割與組合(1)的副本
三角形
Discover Topics
Trigonometry
Circle
Mode
Parabola
Square