Quadrilaterals that have parallel opposite sides (assuming that each side is parallel to its opposite):
A parallelogram
A rectangle
A square (really a rectangle with all sides equal in length)
Chat with our AI personalities
The Opposite Sides Parallel and Congruent Theorem states that if a quadrilateral has a pair of opposite sides that are parallel and congruent, then the quadrilateral is a parallelogram.
Then, the opposite sides are congruent.
A quadrilateral is a polygon with four sides. A parallelogram is a quadrilateral in which the opposite sides are parallel.
The opposite sides of a parallelogram are parallel lines and a parallelogram is a 4 sided quadrilateral
parallelogram