Grady drew a circle on a drawing pad during Math class. The diameter of the circle is 64 inches.

Using the formula below for area of a circle, what is the exact area, in square inches, of Grady's circle?

(Diameter is 64 so the radius is 64/2)

(A = πr2)


(A.) 32π in2


(B.) 64π in2


(C.) 1,024π in2


(D.) 201π in2​