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The name of the evolute of an ellipse is ___________

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The name of the evolute of an ellipse is ___________

(a) Centroid

(b) Astroid

(c) Asteroid

(d) Cycloid

I had been asked this question in homework.

My question is taken from Evolutes in portion Differential Calculus of Engineering Mathematics

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Correct option is (b) Astroid

The explanation: Astroid is known as the evolute of ellipse whereas centroid is associated with triangle. Asteroids are small planet like structures found in space. Cycloid is the curve traced by a point on the circumference of a circle.

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