Parallel Lines are lines in the same plain that NEVER touch.
Intersecting Lines are lines in the same plain that meet or intersect.
Perpendicular are lines in the same plain that intersect at a 90 Degrees Angle
Line Segment is a piece of a line with starting and ending points.
Try to name all the 7 line segments in this picture.
Here's A video..
Here's a link TO HELP YOU. This is Another link to help if you don't understand the first link!