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三角形の外角角の二等分線
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聖徳
GeoGebra
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standingwave-reflection
standingwave-reflection-fixed
standingwave-plus
正１７角形 作図 regular 17-gon 2
正１７角形 作図 regular 17-gon
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Ex_119
回転移動
四角形の各辺の中点を結んだ図
y'=-y/x
栄光1(2)2
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Logic
Normal Distribution
Natural Numbers
Trigonometry
Standard Deviation