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Author:
semifeather
GeoGebra
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折扣
撒针估算面积实验
第八周作业1
比較五件物件的重量
科赫雪花
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商高定理4
橢圓2--四圓心近似法
酷炫
完全平方公式
圆周上的动点形成椭圆
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Equilateral Triangles
Parallelogram
Circumcircle or Circumscribed Circle
Derivative
Diagrams