At a point, which is called a vertex.
vertex
< the point where the two rays meet is called a vertex.
The vertex of the angle.
It's true, an angle is made up of two rays. Two rays meet at a point, and their relative position at the point where they meet will define an angle.
the vertex of the angle
the vertex
The point where light rays meet is called the focal point.
a vertex
the vertex
Concurrent
You are a vertex