Question

measure of a sector of a circle is 90 and its radius is 7cm. find the perimeter of a sector?

Answer 1

Here angle =90°

r=7 cm

perimeter of a sector=2(r)+90/360×2πr

=2(7)+1/4×2×π×7

=14+1/2×22/7×7

=14+11

=25