Doubling the radius doubles the circumference.
If a circle has a circumference of 18pi, the radius is 9.
Circumference=2πradius (π is pi) so... C=2*π*9=18π≈56.549
9. Circumference equals 2 times Pi times the radius. C=2(pi)r. "r" for radius. So if your circumference is 18 times pi, then you do 18 divided by 2, which gives you a radius of 9.
r2*pie=circumference 9(9)*pie 81*pie 254
Circumference = 2Π• radius 2Π•9 = (18×Π)"≈ 56.5"
A circle with a radius of 9 inches has a circumference of 56.55 inches.
The radius is 1.43
circumference = 2*pi*9
Doubling the radius doubles the circumference.
9 Pi is the circumference.
The radius is about 1.432 units.
If a circle has a circumference of 18pi, the radius is 9.
A circle with a radius of 9 inches has a circumference of 56.55 inches and a diameter of 18 inches.
The circumference is about 56.55 yards.
If radius of a circle is 9 centimeters the circumference would be: 56.55 cm (r x 2 x Pi = circumference).
56.549