Placing a question mark at the end of a phrase does not make it a sensible question. Try to use a whole sentence to describe what it is that you want answered.
I assume the question is about a "common END point", and although you have not said so, what you want is to know what it is called. If that is the case, then the answer is an angle.
angle
An angle is formed between the two rays at the common end point.
Angle
angle
The common end point of the sides of an angle is called the vertex. The sides are referred to as rays.
angle
angle
Angle
An angle.
An angle is formed between the two rays at the common end point.
Yes when two lines share a common end point an angle is formed
Angle
Angle
angle
An angle.
An angle
an angle