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最小周長
Author:
張丰耘
GeoGebra
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龙形曲线-分形龙2
椭圆内切圆链
正方形雪花图案
科赫雪花
异形操场
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空間三坐標平面101.12.22
以面積固定平行線軌跡
Quiz on Index Notation 指數記數法:測驗
比例線段截面積
繡曲線
Discover Topics
Division
Arithmetic
Triangles
Centroid or Barycenter
Constructions