C=2(pi)r Solve for r?

Question

How do you do this? C=2(pi)r. How would you solve for r? Thanks!

Answer 1

C = 2(pi)r (divide both sides by 2pi)

C/2pi = r

answer is r = C/2pi  

Answer 2

C = 2pi*r (divide both sides by 2pi)

C/2pi = r

r = C / 2pi <===ANSWER

Answer 3

well you are trying to isolate for r so then you would divide 2pi to the other side and you would get

c/2pi=r

Answer 4

r = 2(pi) over C

or 2(pi)/C

Answer 5

divide both sides by 2pi