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三角形の心の相互関係

Author:Bunryu Kamimura

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standingwave-reflection-free
対数螺旋
正１７角形　作図　regular 17-gon
接点の作る円は内接円
等積変形2

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四角形の重心
等積変形と四角形　p101
面積４STEP452
いろいろな対称移動
角の二等分線上の点からの２辺までの距離

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Quadrilaterals
Arithmetic
LCM and GCD
Reflection
Cone

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