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None of the following is generated by rolling one curve on another except

  • A.a rectangular hyperbola
  • B.an epicycloid
  • C.an ellipse
  • D.a parabola

Answer: B

Correct answer: an epicycloid

An epicycloid is traced by a point on a circle rolling on the outside of another circle, so it belongs with the cycloid and the hypocycloid as a roulette. The other three are conic sections, obtained by cutting a cone with a plane, and no rolling motion produces them.

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