Multiply the diameter by pi.
12inch x Pi
You need to know diameter of each circle, which are different for each circle; each circle circumference is pi x diameter where pi = 3.14159
Multiply the diameter by the constant pi.
Because the ratio of the circumference of any circle to its diameter is pi.
To find the diameter of a circle, you will either need to know the area or its circumference. If you know the area: diameter = 2 x squareroot(area / Pi) If you know the circumference diameter = circumference / Pi
Diameter = circle's circumference/pi
Pi times the diameter.
If the diameter of a circle is 40 m then the area (in terms of Pi) is: about 400pi m2
pi = circumference/diameter circumference = pi*diameter or 2*pi*radius
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.
Circumference of a circle: pi times diameter
As pi is the ratio of the ratio of the circumference (C) of any circle to its diameter (d), the circumference of a circle in terms of pi is: C = pi x d The circumference of a circle is pi times its diameter or 2 pi times its radius (since a diameter is 2 times the radius).
circumference = 84*pi
Circumference in terms of pi = 2pi yards Area in terms of pi = pi square yards
Diameter of a circle = circumference/pi
If you mean the diameter of a circle with area pi, then the diameter is 2. If you mean the diameter of a circle with circumference pi, then the diameter is 2. If you mean the diameter of a circle with diameter pi, then the diameter is pi. If you mean the diameter of a circle with radius pi, then the diameter is 2pi.