Q7 of 64 Page 81

The perimeter of a sector of a circle is 37cm. If its radius is 7cm, then its arc length is

Given:

Perimeter = 37cm


radius = 7cm


perimeter of sector = arc length + r + r


= arc length + 2r


37 = 2(7) + a


a = 37 - 14 = 23cm


Option (a) is correct.

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