Area of Circle?????????????????????????????

The area is 56. How do you determine the length of the radius?

The area = (pi) r^2
56 = pi r^2
17.8 = r^2
4.22 = radius

you would divide 56 by pi, which is 3.14, then divide that answer by 2 to get the radius. The answer is 8.917197452229299. That might not be right. I'm still in elementary school.

Well, the area of a circle is 2πr, so
Area=2πr
56=2πr
(56/2π)=r
r is approximately 8.9126

area = pi*(r^2)
56/pi = r^2
sqrt(56/pi) = r = sqrt(56/3.1415927)
r = 4.222