An angle is a measure of a turn, measured in **degrees or °**. There are **360°** in a full turn. You can find out the size of an angle using a protractor.

- An angle less than 90° is
**acute**. - An angle between 90° and 180° is
**obtuse**. - An angle greater than 180° is
**reflex**. - An angle of exactly 90° is a
**right-angle**.