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

!You can find the final equation for the segment of a circle area: Asegment = Asector - Aisosceles triangle = (0.5 × r² × α) - (0.5 × r² × sin (α)) = 0.5 × r² × (α – sin (α)) Formula