The formula for the radius (r) of a circle is:
r = C / (2π)
where C is the circumference of the circle and π is the mathematical constant pi, which is approximately equal to 3.14159.
The formula for the circumference (C) of a circle is:
C = 2πr
where r is the radius of the circle.
To solve for the radius, you would use the formula:
r = C / (2π)
where you plug in the given value for the circumference, and then solve for r.
To solve for the circumference, you would use the formula:
C = 2πr
where you plug in the given value for the radius, and then solve for C.