4
At least two pairs: they form the outer rectangle which represents the "universe".
4
A heptagon can have all 7 lines that are perpendicular to one or both its neighbours.
Yes,I think it has got one
Four.
2
A parallelogram has 2 pairs of parallel lines and in the form of a rectangle it has 2 pairs of parallel lines and 4 perpendicular lines that meet at each of its corners at right angles.
There are four perpendicular lines in a rectangle
At least two pairs: they form the outer rectangle which represents the "universe".
none
It has 2 pairs.
4 pairs
A rectangle has 4 perpendicular lines that meet at right angles.
2
Can have no pairs or one pair...
A trapezium has no right angles therefore there are no perpendicular lines. If it had perpendicular lines, it would be a square or rectangle.
How many pairs of perpendicular sides does this figure have?