The symbol used by mathematicians to represent the ratio of a circle's circumference to its diameter is the lowercase Greek letter π, sometimes spelled out as pi.[1]

Draw a circle with a diameter (all the way across the circle) of 1. Then the circumference (all the way around the circle) is 3.14159265... a number known as Pi. Pi (pronounced like "pie") is often written …

Copy and paste pi symbol and learn how to type a pi sign on mac and win. π.

In this film, the symbol is the pass-sign of an underground East German network that smuggles fugitives to the West. The 1998 film Pi is a dark, strange, and hyperkinetic movie about a mathematician who …

Dec 10, 2025 · The symbol for pi is π. It was first used by British mathematician William Jones in 1706 to represent the ratio and was later popularized by the Swiss mathematician Leonhard Euler.

Pi (often represented by the lower-case Greek letter π), one of the most well-known mathematical constants, is the ratio of a circle’s circumference to its diameter.

Pi is a name given to the ratio of the circumference of a circle to the diameter. That means, for any circle, you can divide the circumference (the distance around the circle) by the diameter and always …

May 17, 1999 · Succinctly, pi—which is written as the Greek letter for p, or π—is the ratio of the circumference of any circle to the diameter of that circle.

Introduced by William Jones in 1706, use of the symbol was popularized by Leonhard Euler, who adopted it in 1737. An eighteenth-century French mathematician named Georges Buffon devised a …

Sep 21, 2023 · Pi is a circle's circumference divided by its diameter. (The diameter is twice the radius or double the length from any point on the circle to its center. The circumference is the distance around …