Question

The area of the circle above is 1,519.76 units squared. what is the circumference

Answer 1

In order to find the circumference, we first need to find the radius.  We have the area, so we can find the radius.  We set up this equation:

$1519.76= \pi r^{2}$

We begin by dividing both sides by pi.

483.76 = $r^{2}$

Next, we take the square root of both sides to get the radius.

r = 22.

Next, we plug this into the formula for the circumference, 2 pi r

$C = 2 \pi *22=138.23$

So, the circumference of this circle is 138.23 units.