## Elementary Geometry for College Students (6th Edition)

(a) The figure is a sector. (b) $P = 25~cm$
(a) Since the figure OAB is bounded by two radii of the circle and a rounded arc of the circle, the figure is a sector. (b) We can find the perimeter: $P = (7~cm)+(7~cm)+(11~cm) = 25~cm$