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内接円と傍接円の半径

Author:Bunryu Kamimura
Topic:Incircle or Inscribed Circle, Triangles

リュイリエの定理の証明

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  • 直線の軌跡
  • 円の伸開線
  • 目で見る立方体の2等分
  • 平均変化率

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