First, find the area of the whole pizza:
pi * r^2
The diameter = 2 * r = 16, so r = 16/2 = 8.
pi * 8^2 = 64 * pi
The pizza is cut into 8 congruent pieces, so we do:
(64 * pi)/8 = 8 * pi
The answer is 8 pi, which is about 25.13 inches squared.
