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正弦定理
Author:
Bunryu Kamimura
a/sinA=b/sinB=c/sinC=2Rを正弦定理という。
GeoGebra
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アステロイド
standingwave-reflection-free
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接点の作る円は内接円
standingwave-reflection-fixed
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回転行列
黄金長方形
傍接楕円
立体に潜む平面②
オリガミの数学
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Matrices
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