18 pi or 56.5486678
Chat with our AI personalities
If a circle has a circumference of 18pi, the radius is 9.
Doubling the radius doubles the circumference.
A circle with a radius of 4.5 cm has a circumference of 28.27 cm
18 pi
Circumference=2πradius (π is pi) so... C=2*π*9=18π≈56.549