Pi Approximation Day, also known as Casual Pi Day, is celebrated annually on July 22nd. The day recognises and appreciates the mathematical consonant of pi (π), which is known in various aspects of ...
Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = C/d. The circumference of a circle is, in turn, equal to 2πr, where r is ...