Question

How much more area is there in the 16-inch circular pizza compared to the 12-inch circular pizza shown below?

Diameter = 16 in
Diameter = 12 in
O A. 1 sq in
O B. 287 sq in
O C. 161 sq in
OD. 1127 sq in
O E. 567 sq in

Answer 1

The formula for the area of a circle is pi • (r)^2. The ‘r’ is the radius. We know that the diameter is 16 inches. The radius will ALWAYS be equal to half of the diameter! 16/2 is 8, so r=8.Now we can use the formula. 8^2 is 64, an 64pi is about 201. 201 is the area of the entire pizza.Because we are only looking for the area of one slice, we can put 201 over 12, which is about 16.74.Therefore, the area for one slice is 16.74 square inches.

Explanation: