Answer:
The answer you are looking for is 113 units.
Explanation:
The formula for it is c=2[tex]\pi[/tex]r or since you only have the diameter it is c=[tex]\pi[/tex]d.
So, it would be c=[tex]\pi[/tex](36) which then equals 113.097335529 .
(sorry this might be too late but, hope it helps, even if it's not you, someone else)