Since the formula for Circumference is π*d(diameter), and radius is half of diameter, you work the problem backwards. First, you divide c(circumference) by π. 62.8/π(3.14)=20 20 is your diameter. To find radius, you divide d by 2. 20/2= 10 So the radius is 10.
How do you find the radius of a circle when the circumference is 62.8in