The number (/pa/) is a mathematical constant that is the ratio of a circle's circumference to its diameter. The constant, sometimes written pi, is approximately equal to 3.14159. It has been represented by the Greek letter "" since the mid-18th century. is an irrational number, which means that it cannot be expressed exactly as a ratio of two integers (such as 22/7 or other fractions that are commonly used to approximate ); consequently, its decimal representation never ends and never repeats. It is a transcendental number a number that cannot be produced with a finite sequence of algebraic operations (sums, products, powers, and roots). The transcendence of implies that it is impossible to solve the ancient challenge of squaring the circle with a compass and ruler. The digits in the decimal representation of appear to be random, although no proof of this supposed randomness has yet been discovered.
Uses :
Because is closely related to the circle, it is found in many formulae f ...more

3.14