there is no equation of Pi
Circumference divided by diameter
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I think it is 3.14 that equals to pi when u solve it
The formula is pi x the diameter of the circle, which is also pi x (2 x the radius) C = pi * D C = pi * 2r
It is NOT a formula but an EQUATION . The answer is C = pi*d This equation has been known for thousands of years. It can also be in the form of C = 2 pi r NB 2r = d Also A = pi r^(2) for the area of a circle.
4 pi r 2
an extraneous solution.