# Different Types Of Angles

## Definition of an Angle

An angle is formed when two straight lines or rays meet at a common endpoint. The common point of contact is called the vertex of an angle. The word angle comes from a Latin word named ‘angulus,’ meaning “corner.” ## Definition of a Degree

A degree usually denoted by ° is the unit of measurement for angles in which one full rotation is 360° (degrees). ## Types of Angles

### Zero degree Angle

When two lines are in the same direction with a common point and the angle measures as ZERO. ## Acute Angle

Angle that measures less than 90o ## Right Angle

Angle that measures exactly 90o ## Obtuse Angle

Angle that measures more than 90° and less than 180° ## Straight Angle

Angle that measures exactly 180° ## Reflex Angle

Angle that measures more than 180° and less than 360° ## Full Degree Angle

The angle measures 360°, corresponding to the central angle of an entire circle. Two angles that share the same vertex and have a side in common. ## Complementary Angle ## Supplementary Angle ## Opposite Angle

When two straight lines intersect each other, it forms two pairs of angles; each angle of each pair is directly opposite to its matching angle.  