Definition:Sector of Circle/Angle
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Definition
The angle of a sector of a circle 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 of a circle is also seen referred to as a central angle.
Sources
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): central angle
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): central angle
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): central angle
- 2021: Richard Earl and James Nicholson: The Concise Oxford Dictionary of Mathematics (6th ed.) ... (previous) ... (next): central angle