Question

What is the APPROXIMATE circumference of a circle with a radius of 9 inches? Use 3.14 for π. 28.3 in. 56.5 in. 254.34 in. 113.0 in.

Answer 1

56.5

Explanation:

The circumference is the product of the diameter and PI

P = (9+9)*π = 18*3.14=56.52

Answer 2

56.52 in

Explanation:

Circumference Formula: C = 2πr

Since we are given radius r = 9, simply plug it into the formula:

C = 2π(9)

C = 18π

C = 56.5487