perimeter of a circle = pie *r^2
Hence r^2 = perimeter/ pie
hence r = (perimeter/Pie)^1/2
Hence diameter = 2r= 2* ( perimeter?pie) ^1/2
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Diameter = circle's circumference/pi
Circumference in terms of pi = 2pi yards Area in terms of pi = pi square yards
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.
12inch x Pi