Infinitely many.
how many sets of parallel lines are in a triangle
2 pairs of parallel lines
There are 2 sets of parallel lines.
A dodecahedron need not have any parallel lines.
a square has 2 pairs of parallel lines
Yes, a cylinder has parallel lines. Specifically, the edges of the circular bases of the cylinder are parallel to each other, as are the lines that run vertically along the height of the cylinder. These lines maintain a constant distance apart and do not intersect, which is the defining characteristic of parallel lines.
A cylinder includes an infinite number of parallel lines. Every line in the curved surface is parallel to every other one and perpendicular to the two ends. . "A cylinder 2" is meaningless. You would have to look at the homework you're trying to get the answer for to see what cylinder 2 means.
Maybe
A triangle can have no parallel lines.
A cylinder has 2 flat, parallel faces.
A pentagon has no parallel lines.
it has too parallel lines!
A cone does not have any parallel lines
how many sets of parallel lines are in a triangle
A square has 2 pairs of opposite parallel lines.
A cube has exactly 6 parallel lines.
2 pairs of parallel lines