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立体に潜む平面①
Author:
斎藤 幸弘
GeoGebra
New Resources
standingwave-plus
直線の軌跡
standingwave-reflection-free
サイクロイド
正17角形 作図 regular 17-gon
Discover Resources
数学, 中学(Junior high school)
集合の要素と要素の個数
立方体の凸点の処理
正二十面体
完全四角形の外接円は一点(焦点)で交わる
Discover Topics
Reflection
Unit Circle
Means
Equilateral Triangles
Sphere