Find the circumference of the circle. Area=81π ft^2. With steps?

Circumference has two formulas: C = pi times diameter and C = 2 times pi times the radius. In this problem you are given the radius. So, you need to fill in the blanks.

Step one set up your formula:

C = 2 times pi times radius

Step two fill in the blanks

C = 2 times (what you are using for pi) times 81

The answer is (using 22/7) 509.14

If this is not the answer you were looking for my apologies.