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展開図が正方形の三角錐

Author:holon

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目で見る立方体の2等分
接点の作る円は内接円
standingwave-plus
二次曲線と離心率
円の伸開線

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凸レンズ
砲丸投げ
サイクロイド001
鳩の巣原理_正三角形（分割あり）
平面の方程式

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Tangent Line or Tangent
LCM and GCD
Translation
Stochastic Process or Random Process
General Quadrilateral

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