Area of sector = θ 360 × π r 2 Derivation: In a circle with centre O and radius r, let OPAQ be a sector and θ (in degrees) be the angle of the sector. Area of the circular region is πr². Let this

Sector Area = α × πr² / 2π = α × r² / 2 The same method may be used to find arc length - all you need to remember is the formula for a circle's circumference. 💡 Note that α

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