i think it is 35.65 i dont know look online please because honestly i dont know and i might be very wrong and i dont like for you to have a bad grade because of me . maybe this might help . i looked it up online on google. just type "how to find diameter of circle using circumference" and they will give you like a table and you put your answer there so they will tell you the answer. Have a great morning, day, or night :)