## Elementary Geometry for College Students (7th Edition) Clone

$\approx$ 30.57 in
we need to find the perimeter of the sector which is nearest hundredth of an inch. We need to find out the arc length which is formed by sector In a circle whose circumference is c, the length l of the arc whose degree measure is m is given by l =$\frac{m}{360}$ * c = $\frac{80}{360}$ * 2$\pi$r = $\frac{80}{360}$ * 2$\pi$(9) l = $\frac{2}{9}$ * 18$\pi$ = 4$\pi$ in The perimeter of the sector = 2 * radius + length of arc = 2 * 9 +4$\pi$ = (18 + 4$\pi$) in. $\approx$ 30.57 in