Definitions [1]
Definition: Sector of a Circle
Sector of a circle
Region enclosed by two radii and the corresponding arc.
Minor sector
Sector with angle < 180°.
Major sector
Sector with angle > 180°.
Angle of major sector = 360° − angle of minor sector.
Formulae [2]
Formula: Area of a Sector
\[\text{Area of sector}=\frac{\theta}{360}\times\pi r^2\]
Formula: Length of an Arc
\[\text{Length of arc}=\frac{\theta}{360}\times2\pi r\]
