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There is no formula for Pi, it cannot be represented by any formula. It is a fundamental constant.
use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi
It is the formula for finding the circumference of a circle which is the same as 2*pi*radius
There is only one formula for pi, which is the ratio of the circumference to the diameter of a circle.