As many as you like.
At least 4 lines, but no matter how many lines, every line has to be parallel with at least one other line.
2 pairs of parallel lines.
1 pair of parallel line
There cannot be parallel lines in any [plane] triangles.
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At least 4 lines, but no matter how many lines, every line has to be parallel with at least one other line.
2 pairs of parallel lines.
1 pair of parallel lines
A cube has exactly 6 parallel lines.
1 pair of parallel line
There cannot be parallel lines in any [plane] triangles.
no lines
Assume there are no lines through a given point that is parallel to a given line or assume that there are many lines through a given point that are parallel to a given line. There exist a line l and a point P not on l such that either there is no line m parallel to l through P or there are two distinct lines m and n parallel to l through P.
Exactly one. No more and no less.
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.
There are many geometrical lines and some of them are:- Parallel lines Perpendicular lines Intersecting lines Lines of symmetry Line segments Straight line equations Line of best fit Dotted lines Boundary lines Imaginary lines
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