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Author:
KUMIKO TAKANO
GeoGebra
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正１７角形 作図 regular 17-gon
正１７角形 作図 regular 17-gon 2
平均変化率
直線の軌跡
サイクロイド
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８つの接円
数学2 星型五角形
中点連結定理_導入
五心
ensui perfect
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Plane Figures or Shapes
Conic Sections
Rectangle
Logarithm
Vectors 2D (Two-Dimensional)