Question

What is the area of a circle with a radius of 9 cm? (Express your answer using π.)

A.
81π cm2

B.
18π cm2

C.
324π cm2

D.
9π cm2

Answer 1

It is A because the area of a circle id πr^2 an 9*9=81 81

Answer 2

Area of a circle= π * r^2
π*9^2
π*81= 81π
Your answer is A.