This depends on how the double arrow is drawn. Most of the lines if not all will be parallel.
How many parallel sides has a trapezium?
0 Parallel sides
A pentagon has no parallel sides.
yes 2 parallel sides
It Has 2 Pair of Parallel Sides
a pentagon has no parallel sides
A triangle has no parallel sides.
It has three parallel sides. ;)
2
Answer: 2 parallel lines you dig Answer: None of the sides can be parallel to any of the other sides.
A parallelogram has two pairs of parallel sides.
Infinitely many. Every regular polygon with 2n sides has n pairs of parallel sides. Then there are irregular polygons which can have parallel sides. And there are also irregular shapes which have parallel sides.