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The Beautiful Dance of the Earth and Venus
Author:
Chenwei Chen
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基础知识
圓面積的應用
椭圆的生成
勾股树
圆锥曲线的第二定义
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動圓的圓心軌跡為橢圓
Relationships between chords and their distances from centre
大邊對大角
給錐體一個名字 4
二次函數01
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Numbers
Secant Line or Secant
Tangent Line or Tangent
Pyramid
Special Points
