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 ...

The sum of the exterior angles of a polygon is 360°. The sum of exterior angles is 360°. The exterior angle is \(360 \div 5 = 72^\circ\). The interior and exterior angles add up to 180°.

If you don’t want to miss a thing, you need a 360 camera. With a pair of lenses facing in opposite directions, the best 360 cameras shoot and stitch spherical video. This means you can capture ...