two lines that never intersect or touch.
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An example of parallel lines are the two rails of a railway track, rails which never meet. An oval is a line or shape that has no parallel lines.
No. Parallel has a specific meaning. For lines to be parallel, they have to lie in a common plane, but not touch each other. If they are skew, they still don't touch each other, but they now do not lie in a common plane. More specifically, skew lines, by definition, are not co-planar.
no parallel lines
parallel lines are diagonal lines or increasing lines
Skew lines are not parallel. Parallel lines are across from each other in some way and are exactly parallel.