The comlete question with the diagram is in the picture attached.
Answer:
Point [tex]\boxed{\text{ E }}[/tex] is the vertex of the angle marked in the figure.
Explanation:
When two lines intersect each other they will form an angle and the intersection point will be the vertex of the angle.
In the figure attached, the line that joins the points A and B and the line that joins the points C and D intersect at the point E, forming the corresponding angle (shadowed in the figure).
Such intersection point, which marks the angle, is the vertex of the angle.
