Midpoint
If two segments are of equal length, then we call them congruent segments. Congruency is used when we do not know the specific length or measure, but instead we are dealing with unknown values. In other words, if I know that segment AB=8, I cannot say that AB is congruent to 8 since 8 is a specific value. I could say that segment AB is congruent to another segment, maybe segment BC but it would be improper to say that a segment is congruent to a specific value.
Congruent lines
Congruent.
vertical line segment
I'm not exactly sure what you mean by "segment" but the Constitution is divided into segments called Articles.
Segments of equal length are called congruent segments. You can identify them by congruency marks. congruency marks look like this on your line: ---l-----------l---
Functional segments of DNA are called genes
Line segments that form a polygon are called its sides.
This point is called the midpoint.
No, a segment is a piece of a line. However, two segments that intersect at a point make an angle. In fact, the segments that make up the angle are called the sides of the angle.
It's called a Midpoint.