lines go infinitely in both directions of the line
line segments are just a part of the lines
rays start at one point and go off into the other direction infinitely
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Rays aren't really lines, since (Euclidean) lines extend infinitely in all directions, so they can't be parallel lines. But that's to fret a bit too much over the wording. Yes, rays, just like lines and line segments, can be parallel to other rays, lines, or line segments.
it dont have similarity
Plotting points. Graphing lines, line segments, rays, etc.
no because lines have arows on each end rays dont
The three differ in their extent. Lines are infinite in both directions. Line segments are finite: they have two well defined end-points. Rays are finite in one direction, infinite in the other: it has one end-point and stretches to infinity in the other direction.