What is the circumference of a circle with a radius of 8?

A circle with a radius of 8 units has a circumference of 50.27 units.
The circumference will be 16 pi or 50.2655 (about). Circumference, the distance around a circle, is pi times diameter or it's pi times twice the radius.
C = 2 * pi * r = 2 * pi * 8 = 16 * pi