Angles

An angle is a measurement which shows how far something has rotated.

types of angle :

• acute less that 90°
• right angle 90°
• obtuse more than 90° but less than 180°
• straight line 180°
• reflex more than 180° but less than 360°
• full turn 360°

Here are some angle facts that can help you:

1. Angles of a triangle always add up to  180
2. Angles on a straight line always add up to 180
3. Angles on a point always add up to 360

In a test these may be the reasons why some angles are not labeled.