Calculate first the area of the pizza using the equation,
The 36-inch monster pizza has a diameter of 36 inches and therefore has a radius which is equal to 18 inches.
Substituting the known values,
A = = 1017.88 in2
Since the pizza is divided into 12, the area is to be divided by 12.
Area of each slice = 1017.88 in2/12 = 84.82 in2