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余弦定理Cosine theorem
Author:
Bunryu Kamimura
余弦定理(ピタゴラスの定理の拡張)KN=2EG=2AEcosE
GeoGebra
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接点の作る円は内接円
standingwave
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ポースリエ・リンク その2
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共役な極と極線が作る四角形
鈍角三角形の極円
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Differential Equation
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