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Pappus Chain

Author:李俊儀

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兩位數除以一位數（一）
找出對稱軸
三位數除以一位數（一）
球体的体积推导（优化版）
兩組對邊相等和有直角的四邊形

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微積分基本定理
鏡射矩陣 (CAS)
角度比較
畫三角形第3題
椭圆的定义

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Volume
Orthocenter
Tangent Line or Tangent
Derivative
Circumcircle or Circumscribed Circle

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