### What's the meaning of the **Pi** »

# Pi

#### This page is about the meaning, origin and characteristic of the symbol, emblem, seal, sign, logo or flag: **Pi**.

The number pi (symbol: π) /paɪ/ is a mathematical constant that is the ratio of a circle's circumference to its diameter, and is approximately equal to 3.14159.

It has been represented by the Greek letter "π" since the mid-18th century, though it is also sometimes written as pi. π is an irrational number, which means that it cannot be expressed exactly as a ratio of two integers (such as 22/7 or other fractions that are commonly used to approximate π); consequently, its decimal representation never ends and never settles into a permanent repeating pattern. The digits appear to be randomly distributed, although no proof of this has yet been discovered. π is a transcendental number – a number that is not the root of any nonzero polynomial having rational coefficients. The transcendence of π implies that it is impossible to solve the ancient challenge of squaring the circle with a compass and straight-edge.

- 5,168 Views

**Graphical characteristics:**

Asymmetric, Open shape, Monochrome, Contains both straight and curved lines, Has no crossing lines.

**Categories:** Greek Symbols, Mathematical Symbols.

## More symbols in Greek Symbols:

Greek alphabet letters and symbols are used as math and science symbols. read more »

## More symbols in Mathematical Symbols:

This is a list of symbols found within all branches of mathematics. read more »

### Citation

#### Use the citation below to add this symbol to your bibliography:

**Style:**MLAChicagoAPA

"Pi." *Symbols.com.* STANDS4 LLC, 2023. Web. 4 Oct. 2023. <https://www.symbols.com/symbol/pi>.

## Have a discussion about Pi with the community:

## Report Comment

We're doing our best to make sure our content is useful, accurate and safe.

If by any chance you spot an inappropriate comment while navigating through our website please use this form to let us know, and we'll take care of it shortly.

## Attachment

## You need to be logged in to favorite.

## Log In