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円の面積（分割）
Author:
Tsuyoshi Yamamoto
GeoGebra
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正１７角形 作図 regular 17-gon
円の伸開線
等積変形2
カージオイド
アステロイド
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Euclidean Geometry
行列の固有値の求め方
数学Ⅲ分数不等式②
１次関数・反比例・２次関数の変化の割合
rotationB
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Derivative
Scalene Triangles
Addition
General Quadrilateral
Rotation