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cosのグラフ
Author:
Saito Koichi
GeoGebra
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接点の作る円は内接円
正１７角形 作図 regular 17-gon 2
standingwave
等積変形2
コイン投げと樹形図
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相似１
頂点の重心（平均）と多角形の重心
公転と自転
反比例
三辺の積が１の三角形
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Geometry
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Cone
Perimeter