The formula to calculate the arc length is: \(\text{Arc length} = \frac{\text{angle}}{360^\circ} \times \pi \text{d}\) Calculate the arc length to 2 decimal places. First calculate what fraction ...

In order to derive the formula to calculate the angle at the centre of the sector, the formulae for the arc length and area of a sector can be rearranged so that we can calculate the fraction of ...