Question

The area of a circle is 4pie cm2. What is the circumference, in centimeters? Express

your answer in terms of .

Answer 1

4
`\pi`

Explanation:

A =
`\pi`
`r^(2)`

A = 4
`\pi`
`cm^(2)`

4
`\pi` =

4 =
`r^(2)`

2 = r

C = 2
`\pi`r

C = 2(2)
`\pi`

C = 4
`\pi`