A triangle does not have any parallel lines. By definition, a triangle is a three-sided polygon with three angles. The sides of a triangle are connected in such a way that each side intersects with the other two sides at the vertices, forming the angles. Since all three sides intersect each other, none of them can be parallel.
In geometry, parallel lines are lines in a plane that do not meet; they are always the same distance apart and never intersect. Since a triangle’s sides must intersect to form the angles, it is impossible for any two sides of a triangle to be parallel.
Therefore, the answer is that a triangle has zero parallel lines.