The common endpoint of an angle is called
A. Vertex
B. Zero
C. End point
D. None

Hint: In these types of question remember the basic properties of angle and some basic concepts of geometry to solve the answer of the question.

Complete step-by-step answer:
Suppose there are two rays starting from one single point and travelling to the different direction with respect to each other so, the vertex is the point where the two rays intersect each other and travel at some angle from each other and angle is the angular distance between two rays travelling in different direction with respect to each other.
So the end point of an angle is called a vertex.



Note: In these types of questions with the help of the basic concepts of geometry and basic properties of angle and remember the properties to solve the question for example point form where two rays intersect each other or start is called vertex and the angular distance of the rays moving in the different direction with respect to each other is called angle.