Question

A large pizza has a diameter of 18 inches. How many square inches of pizza does the large pizza have?

Answer 1

we, know that
the area of a pizza is equal to the area of a circle
so
area of a circle=pi*r²
diameter=18 in
radius=diameter/2-----> r=18/2------> r=9 in
area of a circle=pi*9²------> 254.34 in²

the answer is
254.34 in²