None because a triangle only has 3 sides of which none can be parallel to each other
A trapezoid has one set of parallel lines.
5 pairs of parallel lines, plus a set of 5 parallels.
One set
Infinitely many. Polygons with 6 or more sides can have 3 pairs of parallel lines. Polygons with 7 or more sides can have a set of three parallel lines.
Contributor Answer 1A cube has 6 parallel lines.______________________________________Contributor Answer 2I count three sets of parallel lines, with 4 lines in each set.________________________________________Contributor Answer 3A cube has 12 pairs of parallel lines
Right triangles have a set of perpendicular lines and no parallel lines.
A trapezium has only 1 pair of parallel lines.
A parallelogram always has one set of parallel lines, plus another set also.A trapezoid (trapezium) always has exactly one set of parallel lines and no more.Any shape with more than four sides can have one set of parallel lines, but doesn'tnecessarily have to.
It has 1 set of 3 parallel lines and 3 sets of 2 parallel lines, and 18 angles (3 sides meet at each vertex)
parallel lines = a set of parallel lines above
trapezoid
A trapezoid, trapezium and a pentagon have only 1 set of parallel lines.