divide the circumference by pi and then divide the quotient by 2
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find the radius of a circle with circumference of 42.1
A circle with a radius of 8 inches has a circumference of 50.27 inches.
The radius of a circle is the distance from its centre to its circumference. If a circle has a radius of r units then the length of its circumference is 2*pi*r units.
The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.
Circumference of a circle = 2*pi*radius Circumference = 2*pi*5.6 = 35.18583772 units