It's the vertex
The vertex.
An endpoint on an angle refers to the point where one of the rays forming the angle terminates. In a geometric context, an angle consists of two rays (sides) that share a common starting point, known as the vertex. Each ray extends infinitely in one direction, while the endpoint is the fixed point at the vertex. Thus, there are typically two endpoints when discussing the rays of an angle, but the vertex itself is the primary focus as the shared endpoint.
an angle is composed of two rays that have the same endpoint.
Two rays that share an endpoint form an angle.
Angle An angle is formed by 2 rays extending from the same endpoint.
An angle is the union of two rays with a common endpoint.
The common endpoint of 2 rays that form an angle is the vertex.
an angle has two rays with the same endpoint.
An angle is formed by two rays with a common endpoint.
vertex
An angle is formed by two rays with the same endpoint. If the two rays are perpendicular to one another, they form a right angle.
Two rays with the same endpoint form an angle. A ray is a part of a line that starts at a particular point and extends infinitely in one direction. When two rays share the same endpoint, they create an angle that is measured by the amount of rotation from one ray to the other. The common endpoint is called the vertex of the angle.