its the point of concurrency
concurrent (for geometry)
concurrent lines are In geometry, three or more lines are said to be concurrent if they intersect at a single point.
A point where two or more lines intersect
Theorem: If two lines intersect, then exactly one plane contains both lines. So, when two or more lines intersect at one point, they lie exactly in the same plane. When two or more lines intersect at one point, their point of intersection satisfies all equations of those lines. In other words, the equations of these lines have the same solution, which is the point of intersection.
Not if they are straight lines.
the thing is that it helps you read or do something in the corect way it helps you