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同位角，錯角

Author:polyhedron

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正１７角形　作図　regular 17-gon
対数螺旋
コイン投げと樹形図
目で見る立方体の2等分
カージオイド

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方べきの定理Ⅱ
中点多角形その２
根から係数（方程式）へ
y=x^2のフーリエ展開
convex set

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Distributions
Mathematics
Equilateral Triangles
Inequalities
Intersection

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