Why it is not possible for a line to have a mid point?

A line is defined as an infinite set of points extending in both directions without endpoints, meaning it has no fixed length. Because it lacks boundaries, there is no specific point that can be identified as the "midpoint" of the line. In contrast, a line segment, which has two endpoints, can have a midpoint that divides it into two equal parts. Thus, the concept of a midpoint is only applicable to line segments rather than to lines.