Nikhil Deshpande
2

To make this problem easier, substitute a value for the radius of the circle. If the radius is 8, the circumference will be 2πr = 2(π)(8) = 16π. (radius / circumference) = 8 / 16π = 1 / 2π. Therefore, the ratio of the circumference to the radius is 2π : 1.