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正方形の内角
Author:
Ryoichi Nakayama
GeoGebra
New Resources
接点の作る円は内接円
小テスト
正１７角形 作図 regular 17-gon 2
直線の軌跡
サイクロイド
Discover Resources
Σｋ＝１＋２＋３＋
おうぎ形
a 投影図(3)
円錐曲線(楕円)
ルート２の長さ
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Fractal Geometry
Plane Figures or Shapes
Quadrilaterals
Square
Matrices