Radius = circumference/pi
Circumference of a circle: 2 x pi x radius.
The circumference of a circle, if the radius is 11cm, is about 69.12cm
A radius (not raduis) of 15 units implies a circumference of 94 units.
The circumference is 2*pi*radius (not raduis) and this formula is applicable whether the radius is an integer, a fraction, or even an irrational number.
Circumference = 2*pi*radius (not raduis) = 19 cm, approx.
Radius (not raduis) =circumference/(2*pi)
A circle with a radius of 8 units has a circumference of 50.3 units.
C = about 12.57
Divide the circumference by 2pi
Circumference of a circle = 2*pi*radius
circumference = 2*pi*9 inches