A trapezoid has one pair of parallel sides.
A trapezoid may have zero or one pair of congruent sides.
It has 2 pairs.
None but it has end sides of equal lengths
4 pairs
It doesn't need any in order to be a trapezoid. It can have a max of two pairs of perpendicular sides.
Can have no pairs or one pair...
Zero
A trapezoid has one pair of parallel sides.
A trapezoid may have zero or one pair of congruent sides.
2 pairs
2
It has 2 pairs.
Perpendicular would be at a right angle. If your sides are abcd, then ab, bc, cd, and da are perpendicular pairs.
None but it has end sides of equal lengths
4 pairs
How many pairs of perpendicular sides does this figure have?