Question

A circle has a radius of 9 mm. What is its circumference?
Use 3.14 for a

Answer 1

`56.52\text{ mm}`

Explanation:

The circumference of a circle with radius
`r` is given by
`A=2r\pi`.

We're given a radius of 9 mm and told to use
`\pi=3.14`. Substituting these values, we get:

`A=2(9)(3.14),\\A=\boxed{56.52\text{ mm}}`

Answer 2

56.52 mm

Explanation:

The circumference of a circle is given by

C = 2 * pi *

C = 2 * 3.14 * 9

C = 56.52