The area of a sector of a circle of radius 21 ,cm is 77 ,cm

MATHEMATICS · Single correct · CBSE · Mathematics · Areas Related to Circles · Areas Related to Circles

Problem

The area of a sector of a circle of radius 21\,cm is 77\,cm

^{2}

. Find the measure of the central angle of the sector. (a)

30^\circ

(b)

20^\circ

(c)

40^\circ

(d)

10^\circ