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天動説　Ptolemaic theory

Author:holon

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サイクロイド
正１７角形　作図　regular 17-gon
円の伸開線
等積変形2
sine-wave

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simson_01
正五角形の作図
体5_187_ex3
二次関数最大最小定義域
共通部分と和集合（intersection and union）のコピー

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Pythagoras or Pythagorean Theorem
Translation
Natural Numbers
Sphere
Circumcircle or Circumscribed Circle

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