Roulette curve 87

by Firkin - uploaded on December 11, 2015, 9:13 pm

A spirograph-type curve such as would be obtained by rolling around the inside of the curve described in polar coordinates as r = (1-0.4COS(9A))COS(3A) a circle with radius 0.0672 for five revolutions, the drawing point being midway between the circle's centre and perimeter.

hypocycloid hypotrochoid roulette spiral spirograph
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