# Definition:Sector/Angle

< Definition:Sector(Redirected from Definition:Angle of Sector)

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## Definition

The **angle of a sector** is the angle between the two radii which delimit the sector.

In the above diagram, the **angle of the sector** $BAC$ is $\theta$.

The conjugate angle of $\theta$ also forms a **sector**, denoted $CAB$ (see above).

## Also known as

The **angle of a sector** is also seen referred to as a **central angle**.

## Sources

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