What's the diameter of a circle with a circumference of 48 millimeters

Since we are given circumference, we think the formula for the circumference, which is 2 (pi) r or (pi) d where r and d is the radius and diameter respectively. the smarter formula of the 2 is (pi) d because it's d we want to find. setting up our equation:

circumference = (pi) d

48 = (pi) d

dividing both sides by pi gives:

d = 15.29 millimeters

let me know if you have any questions!