Arcs are an important aspect of geometry, physics, trigonometry and design work. However, curved lines are much more difficult to measure than straight lines, which is why it's important to ...

Save guides, add subjects and pick up where you left off with your BBC account. Calculate the arc length to 2 decimal places. First calculate what fraction of a full turn the angle is. 90° is one ...

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 ...