How many parallel lines can a triangle have?

Answer 1

None. A triangle has 3 lines, none of them parallel to another.

Answer 2

All of the three sides of a triangle can be parts of parallel lines; it's just that no two of them can be parallel with each other. They can be parallel to some other line(s). In plane geometry parallel lines cannot form the sides of a common triangle.

Answer 3

1 2 3 4 5 6 7 8 9 10

Answer 4

3