Pi - Wikipedia The number π ( paɪ ⓘ; spelled out as pi) is a mathematical constant, approximately equal to 3 14159, that is the ratio of a circle 's circumference to its diameter
Pi | Definition, Symbol, Number, Facts | Britannica Pi, in mathematics, is the ratio of the circumference of a circle to its diameter Because pi is irrational (not equal to the ratio of any two whole numbers), its digits do not repeat, and an approximation such as 3 14 or 22 7 is often used for everyday calculations
What is pi? - Circumference of a circle - KS3 Maths - BBC π (pi)Pi is used to represent the ratio of a circumference of a circle to its diameter, denoted with the Greek symbol π is the ratio of the circumference of a circle to the length of its
Pi - Math is Fun 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 using the greek symbol π The definition of π is: of a Circle
What is Pi? - Pi Day 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
What Is Pi? Understanding the Number Symbol - Statistics by Jim Pi is an irrational number, which means you can’t write it as a simple fraction Its decimal form goes on forever and never settles into a repeating pattern No matter how far you go, the digits keep coming We use the Greek letter π to represent it
What Is Pi (π) in Math? A Kid-Friendly Definition Pi (π) is a special number that tells us how the distance around a circle (its circumference) compares to the distance across the circle (its diameter) No matter the size of the circle, the ratio is always the same: π = circumference ÷ diameter