A line segment refers to a limited part (including two endpoints) between two points on a straight line? Is the distance between these two points. Unlike straight lines and rays.

Line segments are represented by letters A and B or lowercase letters representing their two endpoints. Sometimes these letters also represent the length of the line segment, which is recorded as line segment AB or line segment BA, line segment A .. where A and B represent the two endpoints of the line segment.

Line segment characteristics:

(1) is limited in length and can be measured.

(2) There are two endpoints.

(3) symmetry.

(4) Of all the straight lines connecting two points, the line segment is the shortest. It is called the shortest line segment between two points.