What is the length, in feet, of the circumference of a circle whose diameter is 12 feet?
If d= 12 feet, then C=12*pi feet, which is approximately 37.68 ft.
Let's use 3.14 for pi.
3.14*12 = 37.68
So the circumference is 37.68 ft
EDIT: Hayley, you beat me to it. +5