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Author:
Cheuky Li
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外凸的正方形
旋转体的定义
若隐若现的白点
太极图
椭圆轨迹
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angle
基華小學 GeoGebra 幾何創作室 第 1 節
同位角__水平平行綫
S2 Angles Related to Rectilinear Figures
验证椭圆第二定义
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Mathematics
Circumcircle or Circumscribed Circle
Rectangle
Hypergeometric Distribution
Rhombus