Are all sides of a rectangle parallel?
Each pair of co-interior angles are supplementary, because two right angles add to a straight angle, so the opposite sides of a rectangle are parallel. This means that a rectangle is a parallelogram, so: Its opposite sides are equal and parallel.
Where are the parallel lines in a rectangle?
Parallel sides The opposite sides of a rectangle are parallel lines. Parallel lines always stay the same distance apart; they never meet.
How many sides are rectangle have?