The Circumference of a circle is equal to the area of the circle. Find the radius.

Question

Thanks.

Answer 1

Circumference = 2 times pi times r
Area = pi times r-squared

If Area = Circumference, then..

(2)(pi)(r) = (pi)(r^2)

Divide both sides by r

2(pi) = (pi)(r)

Now, solve for r by dividing both sides by pi.

Answer 2

Thanks!