56.549 cm
Doubling the radius doubles the circumference.
Circumference of the circle: 2*pi*9 = 18*pi cm
The equation for circumference is C = 2*pi*r, where r is the radius of the circle and pi is a constant = 3.14159... Assuming that you mean a 9cm radius, the circumference is therefore: C = 2*pi*r = 2*pi*9cm = 18cm*pi = ~56.549cm
The circumference of a circle that is 9 cm wide is: 28.274 cm
Construct a circle with a 4.5 radius. The circle's circumference is 360 degrees. So mark out 3 by 120 degrees on the circumference and join them to the centre of the circle which will divide the circle into three equal parts.
It is 28.3 cm, approx.
The circumference of circle with radius 12cm is 75.4cm
The circumference of a circle if the radius is 29 is about 182.21
The circumference of a circle with a radius of 11 is: 69.12
The circumference of a circle that has a radius of 3.2cm is: 20.1cm
The radius of a circle with a circumference of 110 is: 17.507