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三圓外切2
Author:
AlexWang
GeoGebra
New Resources
【案例】2013年安徽高考15题
錐體建築師
柱體建築師
三位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
Discover Resources
sin&cos
皓晴是智障
二元一次聯立方程式圖解
(3D) Tasks: Pyramid, Paper folding & Solid of revolution[20170615]
赵爽弦图
Discover Topics
Similar Triangles
Circumcircle or Circumscribed Circle
Sine
Matrices
Orthocenter