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델토이드 곡선

델토이드를 그리는 과정

기하학에서 델토이드 곡선(deltoid curve)은 반지름의 길이가 인 원의 안에서 원주를 따라 반지름의 길이가 인 원이 구를 때, 작은 원의 원주 위에 있는 한 정점이 그리는 곡선으로, 세 개의 뾰족점을 갖는 하이포사이클로이드이다.

방정식

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델토이드 곡선은 매개변수 방정식으로 다음과 같이 나타내어진다.

여기서 a는 굴리는 원의 반지름이다.

넓이와 둘레

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델토이드 곡선 내부의 넓이는 이며, 둘레는 16a이다.[1]

같이 보기

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각주

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  1. Weisstein, Eric W. "Deltoid." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/Deltoid.html
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델토이드 곡선
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