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Archimedes' spiral
Author:
Bunryu Kamimura
Archimedes' spiral Curve(a t cos(t + α), a t sin(t + α), t, 0, 10π)
GeoGebra
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接点の作る円は内接円
正17角形 作図 regular 17-gon 2
二次曲線と離心率
standingwave-reflection-fixed
等積変形2
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三平方の定理 証明12
定方向に内接させる作図
内接二次曲線の接線
セキュリティ
傍心
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Integral Calculus
Ratios
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