If it is a 7.1 cm radius circle, then its radius is exactly 7.1 cm!
If a circle has a circumference of 16 cm then the radius is about: 2.546 cm
The area of a circle, if the radius is 5 cm, is: 78.54 cm2
That depends what you mean with "a 20 cm. circle". If 20 cm. is the radius, you already have the answer. If 20 cm. is the diameter, the radius is half the diameter. (10cm)
14 cm. In a circle, diameter is always twice the radius.
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
The radius of a 2 cm circle is: 1 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
If a circle has a circumference of 16 cm then the radius is about: 2.546 cm
If the diameter is 12 cm the radius is 6 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.
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
The circumference of a circle with an 8 cm radius is: 50.27 cm
If the circumference of a circle is 12 cm the radius is: 1.91 cm
A circle with a radius of 0.5 cm has a circumference of 3.14 cm.