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.
zero
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.
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
zero
Every line that's exactly on the AB line.