pi is the circumference divided by the diameter.
it is a set universal constant and will never change = 3.1415...
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diameter = circumference/pi
The number pi can be defined as: pi = circumference / diameter. Solving for diameter: diameter = circumference / pi. Pi is approximately 3.14.
Diameter = circumference/pi Radius = circumference/2*pi
Circumference=diameter x Pi So, divide the circumference by Pi, and then you'll have the diameter.
The diameter is the circumference divided by pi.