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
Explanation
Arc length is a fraction of the circumference defined by the central angle.
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