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正五角形の作図

Author:Naofumi Horio

New Resources

コイン投げと樹形図
standingwave-plus
カージオイド
接点の作る円は内接円
円の伸開線

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Twin Cylinder
（使用）中三平方根p43
立方体の展開図
入射角・反射角
三角関数の合成

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Trigonometric Functions
Quadratic Equations
Symmetry
Rotation
Correlation

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