What is a Line Segment?

A line segment is part of a line that lies between two points
The points that are on the ends of the line segments are called endpoints
A line segment can be named by its endpoints
The name of a line segment must always have a line without arrows above it to signify that it's just a segment
Every line segment can have two names because you can always flip the order of the endpoints

1. If you were to take a line and cut its ends off, you would end up with a line segment
1. The endpoints mark the full extent of the line segment--the line segment exists only between the two points
1. So our line segment is either EF or FE, both names work
2. All line segment names must have a line without arrows above it to indicate that it names a line segment
1. A line doesn't have a midpoint because it goes on infinitely in two directions
2. A ray doesn't have a midpoint because it goes on infinitely in one direction

Definition: Line Segment