Question

Which is closet to the circumference of a circle with a radius of 9 inches​

Answer 1

18 x pi

Explanation:

circumference = pi x diameter, radius x 2 = diameter

Answer 2

C = 18 pi or approximately 56.52 inches

Explanation:

C = 2*pi*r

The radius is 9

C = 18 pi

We can approximate pi by 3.14

C = 18*3.14

C =56.52 inches