Mathematics for IGCSE & O level - Mensuration (Section 2 - No. 25)
How do you calculate the arc length of a sector?
Arc Length = (θ/360) * 2πr
Arc Length = πr² * (θ/360)
Arc Length = 2πr
Arc Length = (θ/360) * πr²
Explicação
Arc length is a fraction of the circumference defined by the central angle.