Line segments are pieces of lines that have dots at each end and are labeled with letters. Parallel line segments never intersect and are in the same plane, while perpendicular line segments intersect at right angles of 90 degrees. The document discusses different types of line segments such as parallel, perpendicular, and intersecting lines from a textbook on pages 86-88.

1. Parallel and Perpendicular Line Segments

2. Line segments - a line with a beginning and an end. A piece of
a line. You know a line ends when it has dots at each end.
Line segments are labeled with letters.

4. Intersecting - lines that cross or meet.

5. Parallel - describes lines in the same plane that never cross, or intersect
- they are marked using "arrows"

6. Perpendicular
- describes lines that intersect at right angles (90
degrees)
- they are marked using a small square

10. Textbook pg 86-88 all numbers