Question

Find the radius of a circle with the given circumference. C = 6 π in. r = _____

Answer 1

The answer is 3 as far as i know 

Answer 2

The formula for the Circumference of a circle is 2 x 3.14 (Pi) x R (or 3.14D).
Our current equation gives us C = 6Pi. This means that we have the diameter.
6 must be our diameter, as we already have Pi.

Since our formula states that we need 2 x R to make D, we must divide the diameter by 2 to get R.

6 / 2 = 3.

Your radius is 3in.

I hope this helps!