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内心（図形の性質）とくに角度〜

Author:kazuki ikeda, 田中利則

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円の伸開線
二次曲線と離心率
standingwave-plus
平均変化率
standingwave-reflection

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三角形の合同
三平方の定理の１つの証明
えくぁだだ
直線上を転がる三角形
１次関数のグラフ

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Equilateral Triangles
Variance
Continuity
Inequalities
Probability

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