# Definition:Polar Coordinates/Pole

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## Definition

Consider a system of polar coordinates used to identify points on the plane.

Let $O$ be the distinct point identified as the center of the frame.

The point $O$ is referred to as the **pole** of the polar coordinate plane.

## Also known as

Some sources refer to the **pole** as the **origin**, thereby identifying it with the origin of a possibly superimposed cartesian coordinate plane.

## Sources

- 2008: David Nelson:
*The Penguin Dictionary of Mathematics*(4th ed.) ... (previous) ... (next): Entry:**pole**:**1.**