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三角形の内心

Author:M.Kondoh

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standingwave-reflection
アステロイド
等積変形2
対数螺旋
standingwave

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振り子と三角関数
リスト処理のし方（χ二乗分布）
GHS1232
円錐展開図
グラフから式を考える

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General Quadrilateral
Unit Circle
Numbers
Triangles
Curve Sketching

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