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circumcentre final
Author:
Castty
GeoGebra
New Resources
撒针估算面积实验
斐波那契螺旋弧线（表格法）
平行線的判定
常见四边形是否是双心四边形
科赫雪花
Discover Resources
蒙日定理
交點的極限
線段與角度的裝飾
圓周 (圖形A) 的複本
动态展开圆柱体
Discover Topics
Linear Equations
Tangent Line or Tangent
Circumcircle or Circumscribed Circle
Multiplication
Incircle or Inscribed Circle