Definition:Sector/Angle

Definition

 * Sector.png

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.