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正四面体の内接球の半径のコピー

Author:satoumi, 嶋津恒彦

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コイン投げと樹形図
正１７角形　作図　regular 17-gon
サイクロイド
standingwave-reflection-free
対数螺旋

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reach_2_1
nagel
四次方程式の複素数根
z=x^3+y^3+xy
内心

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Trigonometry
Distributions
Derivative
Quadrilaterals
Random Variables

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