[Solved] is a curve generated by a point fixed to a circle, within or outside its circumference, as the circle rolls along a straight line.

Q.	is a curve generated by a point fixed to a circle, within or outside its circumference, as the circle rolls along a straight line.
A.	cycloid
B.	epicycloid
C.	epitrochoid
D.	trochoid
Answer» D. trochoid
Explanation: cycloid form if generating point is on the circumference of generating a circle. epicycloid represents generating circle rolls on the directing circle. epitrochoid is that the generating point is within or outside the generating circle but generating circle rolls on directing circle.

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