2 pairs of parallel lines
1 pair of parallel line
It has a pair of opposite parallel lines of different lengths
A rhombus has 2 pairs of parallel lines.
A trapezoid has one pair of parallel sides. They are opposite parallel lines of different lengths.
None.
Two.
2
1 pair of parallel lines
A trapezoid has 1 pair of opposite parallel lines of different lengths
2 pairs of parrallel lines
One set