Pi Approximation and Representation Alignment Chart
Various approximations, series representations, product representations, and integral representations for the mathematical constant pi (π), also known as the circle constant. It is approximately equal to 3.14159, that is the ratio of a circle's circumference to its diameter, and appears in many formulae across mathematics and physics. The X tier is reserved for incorrect expressions.
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Template last modified: 08/07/2025
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