Another way to calculate the radius of a circle is by using the circumference. C d p C d p. The radius of a circle is one-half the length of its diameter.
If you are looking for a formula to solve your basic math problems your formula is likely here.
The ratio of the circumference to the diameter of any circle is a constant known as pi p which is equal to approximately 314159. Find the perimeter of a regular 360-sided polygon that is inscribed in a circle of radius 5 inches. Curved Surface area of a Hemisphere 4pi r2 Total Surface area of a Hemisphere 3pi r2. If you know the circumference of a circle the radius can be found using the formula where.