A vertex
They form a vertex because they are line segments. An angle is two rays with the same point
When two line segments meet at a point
The point where the two line segments meet
They are perpendicular line segments
straight angle
no since they won't ever meet.
An angle comprises two straight line segments or rays together with the point at which they meet.
It is important to know terminology when learning math. The Vertex is the point where two lines meet and form and angle.
the vertex
vertex
You are a vertex
That's the "vertex" of the angle.