Diameter = circumference/pi
Multiply the diameter by the constant pi.
You multiply the circle's diameter by 3.14 (Pi) to get the circumference.
Circumference of a circle: pi times diameter
To get the circumference of a circle first you have to find the diameter of the circle and multiply the diameter by Pi (3.14 in short). so it is the diameter * Pi.
pi times diameter
Diameter = circumference/pi
circumference of a circle = pi*diameter or 2*pi*radius
Pi x diameter
multiply the diameter times pi (3.14159265)
Multiply the diameter by the constant pi.
You multiply the circle's diameter by 3.14 (Pi) to get the circumference.
Pi is the number of times the diameter of a circle will fit into the circumference. Pi is not a circle, and does not have a circumference or area. To calculate a circumference USING pi, the circumference is diameter * pi. To find the area using pi, area = pi * radius * radius
To find area of a circle using diameter, you use this formuler. Area=pi(diameter/2)(diameter/2)
circ = 2 pi r = pi d
Most scientific calculators have a button for pi. So to find the circumference of a circle multiply pi by the diameter. If there is no pi button you can approximate pi as 3.14.
Circumference of a circle: pi times diameter