The common endpoint of 2 rays that form an angle is the vertex.
An angle.
Angle
Yes.
Yes.
what is a ray
An angle.
vertex
Angle
Yes.
Two rays that share an endpoint form an angle.
An angle is the union of two rays with a common endpoint.
An angle is formed by two rays with a common endpoint.
a vertex
what is a ray
Yes.
-- Two rays with a common endpoint form an angle. -- If they have a common endpoint, then they are collinear. So I guess, technically, the conditions described in the question aren't possible.
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.