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包絡線（楕円）
Author:
Bunryu Kamimura
Topic:
Ellipse
GeoGebra
New Resources
直線の軌跡
正１７角形 作図 regular 17-gon 2
standingwave-plus
対数螺旋
等積変形2
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電界2D
タートルに命令
一次関数
円周角の定理2
数学II 定点を通る直線
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Set Theory
Conic Sections
Scalene Triangles
Diagrams
Matrices