Since the area of a circle is π[tex] r^{2} [/tex], and our radius is 9 we know the total area to be 254.469, and the ratio of sector area to total area is 169.56/254.469 = .6663. There are 360 degrees in a circle, so: [tex]c = 360(.6663) [/tex] ≈ 240°
240 degrees
