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街灯　影の長さ

Author:増永雄大

Topic:Constructions, Geometry, Straight Lines, Planes, Similar Triangles

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接点の作る円は内接円
正１７角形　作図　regular 17-gon 2
アステロイド
円の伸開線
目で見る立方体の2等分

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Rettangolo aureo
二次関数の増減
複素数の累乗
折り紙テント３段階設計図
三角錐01

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Coordinates
Continuity
Diagrams
Triangles
Root

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