4
There are four perpendicular lines in a rectangle
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.
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.
Oh, dude, a rectangle has like, two perpendicular lines. One going up and down, and one going side to side. It's like, the basic geometry you learn in elementary school, man. So, yeah, two perpendicular lines for a rectangle.
2
Can have no pairs or one pair...
How many pairs of perpendicular sides does this figure have?