Length of an Arc formula
A sector of a circle is a pie shaped region bounded by an arc and angle at the centre of the circle. Below the sector of the circle has been shown. And the formula to find the length of an arc labelled length.
…where
no is the angle caused by the sector at the centre of the circle.
no/360o is the fraction of the circle represented by the central angle.
2πr is the circumference of the circle. The all circle and not just the arc.
