Angle (θ)

Definition

An angle is formed by two rays with the same endpoint. It measures the amount of rotation between these rays and is usually measured in degrees or radians.

Related terms

Vertex: The common endpoint of two rays forming an angle.

Degree Measure: A unit for measuring angles based on dividing one complete revolution into 360 equal parts.

Radian Measure: A unit for measuring angles based on the radius of a circle. One radian is equal to the central angle subtended by an arc with length equal to the radius.