Angle
An angle is a geometric figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex. It measures the amount of turn between the two lines and is commonly measured in degrees or radians.
Example
A right angle measures exactly $90^\circ$. For example, the angle formed by the hands of a clock at 3:00 is a right angle.
See Also
- Vertex
- Degree