The distance from the center of the circle to the edge is the radius (r) which is given to be 36 feet. The formula for circumference is:
[tex]C = 2 \pi r[/tex]
Plug in r = 36 to the formula to get:
[tex]C = 2 \pi (36) = 72 \pi [/tex]
Therefore, the circumference is 72pi.