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. It appears in many …
Pi - Math is Fun
Pi (π) 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 …
Pi | Definition, Symbol, Number, & Facts | Britannica
Oct 21, 2024 · 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 …
Pi Symbol (π)
The greek small letter π (pi) is a geometric constant approximately equal to 3.1416. The numeric value is equal to the length of any circle's circumference divided by its diameter.
Pi (π) - Math Tools
All things about Pi (π).The number π is a mathematical constant. It is defined as the ratio of a circle's circumference to its diameter, and it also has various equivalent definitions. It appears …
What is Pi? - Pi Day
Learn about the number pi, why it is important in math, and what it is used to calculate!
Pi - Math.net
Pi Pi (π) is the ratio of the circumference of a circle to its diameter. The value of pi is 3.14159..., an irrational number. Pi is a constant value. That is, the ratio of the circumference to the …