A square has four perpendicular sides.
4
4
Oh, dude, a heptagon has like a bazillion pairs of perpendicular lines... just kidding! It actually has 14 pairs of perpendicular lines. So, like, if you ever need to find perpendicular lines in a heptagon, you've got plenty to choose from.
Two pairs.
none
A kite has 2 pairs of equal sides.
A kite has 4 sides so it has two pairs of opposite sides.
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.
4 pairs
How many pairs of perpendicular sides does this figure have?
A right angle has one pair of perpendicular sides.
Zero
A rhombus has no perpendicular sides but its diagonals are perpendicular to each other and meet at right angles.
2
It doesn't need any in order to be a trapezoid. It can have a max of two pairs of perpendicular sides.