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Q.

The development of the curved surface of a cone is a                      of a                      

A. sector, circle
B. segment, circle
C. segment, ellipse
D. arc, parabola
Answer» A. sector, circle
Explanation: the development of the curved surface of a cone is a sector of a circle, the radius and the length of the arc of which are respectively equal to the slant height and the circumference of the base-circle of the cone.
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