Sector Areas and Arc Lengths
x

Parts of a sector

Parts of a sector

Labelled sector with centre O, two radii marked r, central angle theta, arc length L and shaded sector area A

A sector is a slice of a circle made by two radii and an arc. If the angle at the centre is θ\thetaθ, then the sector is the fraction θ360\frac{\theta}{360}360θ​ of the whole circle.

Sector Areas and Arc Lengths Lesson

  1. IGCSE
  2. /Maths
  3. /Sector Areas and Arc Lengths