the radius and diameter to a circle that is 22.5 inches

Question

if the circumference of a circle is 22.5 inches,what is the radius and diameter of the circle

Answer 1

c = 22.5 in

c =d pi                         22.5 = d pi            d = 22.5 / pi

c = 2r pi                       22.5 = 2 pi r         r = 22.5 /( 2 pi)

Answer 2

waltjhall has a good answer here.

If you want a more fundamental insight into the relationship between pi, circumference, and radius, check out .

Dr. Math also has a shorter text based description of this relationship.