None.
A triangle has no sides parallel to each other.
A triangle has no parallel sides.
None
None
Three pairs. The line joining the midpoints of any two sides of a triangle is always parallel to the third side of the triangle (and half its length).
A triangle can never have any parallel sides.
None.
A triangle has no sides parallel to each other.
A triangle has no parallel sides.
ZERO!
how many pairs of parallel line segments does a stop sigh have
Zero
None
None
None
None