Pi Approximation Day falls on July 22 (written as 22/7 in the day/month date format). It commemorates the common approximation of the mathematical constant π as 22⁄7, which dates back to Archimedes ...

Pi Approximation Day 2023: The ratio of a circle's circumference to its diameter is called Pi. The value of Pi is approximately 3.14. The value of Pi has been calculated to trillions of digits. Google ...

The number represented by pi (π) is used in calculations whenever something round (or nearly so) is involved, such as for circles, spheres, cylinders, cones and ellipses. Its value is necessary to ...