Find the diameter and radius of a circle if a circle has a circumference of 18 in.
Remember that the circumference formula looks like this C=π•d or C=2•π•r
So if the circumference is 18 in we will plug 18 in for C and then solve for d.
So we will set it up like this 18 = π•d
That means the diameter of the circle is 5.73.
To get the radius just divide that by 2. 5.73/2
The diameter is 5.73 inches and the radius is 2.87 inches
