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三角形の外角と二等分線の比
Author:
田中利則
GeoGebra
New Resources
平均変化率
正１７角形 作図 regular 17-gon
standingwave-plus
サイクロイド
sine-wave
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Ex_49
banner
sech cosech coth functions
y'=yとy'=1/x
与えられた２つの線分の積
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Integers
Combinatorics
Solids or 3D Shapes
Circle
General Quadrilateral