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費馬點2
Author:
邱仲民
GeoGebra
New Resources
常见四边形是否是双心四边形
龙形曲线-分形龙
正方形雪花图案
三角函数 的副本
双心四边形
Discover Resources
對摺平行四邊形
P4 四邊形
Testing slope
xsin(x)
椭圆内反射
Discover Topics
Numbers
Ellipse
Rectangle
Angles
Centroid or Barycenter