Circumference of the circle: 2*pi*6 = 37.699 cm rounded to 3 decimal places
use a calculator
The radius of a circle is half the diameter, so if the circle has a diameter of 2 cm, the radius would be 1 cm.
The area of a circle is pi*r2 and its circumference is 2*pi*r where r is the radius = half the diameter. So r = 3.5 cm. Then area = 38.48 square cm and circumference = 21.99 cm As to the circumstance of the circle, that is rather a personal question!
If it is a 7.1 cm radius circle, then its radius is exactly 7.1 cm!
The radius of the circle is: 9.549 cm
If a circle has a circumference of 16 cm then the radius is about: 2.546 cm
The diameter of a circle is twice its radius. Thus the radius of a circle is half its diameter. → a circle with a diameter of 15 cm has a radius of 15/2 cm = 7.5 cm
The diameter of a circle is double the radius. So a circle with a radius of 7 cm has a diameter of 14 cm.
2.8 cm
The radius (radii) of a circle is 1/2 of the diameter. The radius of a circle with a 6.2 cm diameter is 3.1 cm.
The circumference of a circle if the if the radius is 6 cm is: 37.7 cm
If the circumference of a circle is 12 cm the radius is: 1.91 cm