Just have a look at the edges of your desk; the hands of a clock or the keys on your computer. There are examples everywhere. Angles are measured using degrees, ranging from 0 all the way to 360 ...

A full turn around a point equals 360º. If a full turn equals 360º, then the sum of the angles around a point must also be 360º. When you calculate angles around a point, you can use this fact to find ...