A spirograph-type curve such as would be obtained by rolling around the outside of the curve described in polar coordinates as r = 1-cos(2A) a circle with radius 0.217 for ten revolutions, the drawing point being midway between the circle's centre and perimeter.
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Roulette curve 50 free icon was designed by Firkin for icons Png and presented to its users.
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4/3/2018