Question

Find the circumference of the circle. r = 9 in. A. 56.52

Answer 1

56.52

Explanation:

Circumference is
`C=2\pi r`

We are given the radius of 9 in.

Using 3.14 for pi:

`C=2 * 3.14 *9\\\\C=6.28*9\\\\\boxed{C=56.52}`

The circumference of the circle should be 56.52 inches, your answer should be correct.

Answer 2

Answer: 56.54866776... rounded to the nearest tenth

56.55

Explanation:

The formula for circumference is
`C = \pi d` or
`C = 2 \pi r`