A circular pen has an area of #64pi# square yards. What is the circumference of the pen?
1 Answer
Jan 23, 2018
Explanation:
To find the circumference of a circle, you need the radius.
Remember that the area of a circle is
Since we know the area, we can plug it in for
Take the square root of both sides to find the radius:
Now, use the circumference formula of
This simplifies to the circumference equalling