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Author:
chen mingchuan
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正立方體切三刀
动态绘制函数图象
Möbius Strip
旋转，M是CF中点，求BM和GM关系
Geogebra 考题 旋转的正方形
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圓周 (圖形H)
包含除法（整數÷整數）
极坐标
Discover Topics
Special Points
Circumcircle or Circumscribed Circle
Trapezoid
Cylinder
Logarithmic Functions
