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兩圓
Author:
羅紫渝
GeoGebra
New Resources
祖冲之的期望：内棋与外棋
漂亮的摇摆曲线
【案例】2013年安徽高考15题
球体的体积推导（优化版）
多邊形的面積
Discover Resources
Circumference 圓周
angle 123
堆疊多邊形
勒洛三角形頂點C軌跡
金惠吉：光的反射与折射
Discover Topics
Vectors 2D (Two-Dimensional)
Logarithmic Functions
Histogram
Incircle or Inscribed Circle
Special Points