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中点七角形
Author:
Bunryu Kamimura
七角形
GeoGebra
New Resources
アステロイド
standingwave-reflection
正１７角形 作図 regular 17-gon
斜めドップラー
standingwave-plus
Discover Resources
random melody
円錐の切断
線分の衝突
媒介変数表示（数学活用）
小数のかけ算
Discover Topics
Cosine
Parallelogram
Quadratic Equations
Vectors 2D (Two-Dimensional)
Angles