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The curve generated by a point fixed to a circle outside its circumference as it rolls along a straight line is called a _________(a) Inferior epitrochoid(b) Superior trochoid(c) Inferior trochoid(d) Superior epitrochoidThe question was asked in an online quiz.The origin of the question is Curves Used in Engineering Practice in section Lettering Practice, Scales & Curves of Civil Engineering Drawing

Answer»

The CORRECT option is (b) Superior trochoid

Best explanation: Trochoid is a curve generated by a POINT fixed to a CIRCLE, within or outside its circumference, as the circle rolls ALONG a straight line and if the points would had have been outside the circumference of the circle then it would have been called as superior trochoid. The below diagram shows a superior trochoid.



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