PI times the DIAMETER
diameter/2
diameter times 3.14159
The formula for the circumference of a circle is pi * diameter or (2 radius.)
two times the radius (d=2r)
PI times the DIAMETER
diameter/2
diameter times 3.14159
Circumference of a circle = (pi) x (diameter)
The formula for the circumference of a circle is pi * diameter or (2 radius.)
It is: (pi*radius)+(diameter)
Either pi times the diameter or pi times twice the radius (which is the diameter)
two times the radius (d=2r)
circumference of a circle = 2*pi*radius or pi*diameter
1/2 diameter or the circumference/pi/2
The formula for finding the radius of a circle is circumference divided by double of pi. If area is given instead of circumference, the radius may be found by dividing the area by pi, then finding the square root of the resultant quotient. It is also equal to half of the diameter, or the diameter divided by 2.
To calculate this you will need the diameter of the circle. The formula is: diameter/2*pi If you don't know the diameter you can also use the area of the circle: Sqrt(Area/pi) = radius