## Angle measurement

**Angles are formed when 2 lines meet:**

There are 3 types of angles:

Angles are measured in *degrees*.

The symbol for degrees is a
little circle next to the angle's size, like this: 30^{o}.

A *right angle* is 90 degrees, or 90^{o}

A straight line contains 2 right angles, so it is 180^{o}:

**Here are a few typical angles:**