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

The area of the circle = 25$\pi in^{2}$ The area A of a circle whose radius has length r is given by A = $\pi r^{2}$cm 25$\pi$ = $\pi r^{2}$ 25 = $r^{2}$ r = 5 in Therefore diameter of the circle = 2r = 2* 5 = 10 in