parallelograms and squares.
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)
opposite sides are parallel opposite sides congruent opposite angles are equal opposite lines parallel 1 pair opp. lines parallel and congruent
Any regular polygons with an even number of sides can have opposite sides equal and parallel.For quadrilaterals, if any two sides are equal and parallel, the other two sides must also be equal and parallel, and it is a parallelogram (square or rhombus). If the equal sides are not parallel, the figure is a trapezoid (UK trapezium).
Rhombus is a quadrilateral whose all sides are equal and its opposite sides are parallel to each other but their anger are not equal to 90°.
Quadrilaterals are called parallelograms ONLY if both pairs of opposite sides are equal and parallel to each other.
All quadrilaterals apart from rectangles. Even parallelograms have adjacent angles that are not equal.
Because they both have opposite equal parallel sides and they are both 4 sided quadrilaterals
quadrilaterals with two pairs of parallel sides
A parallelogram.
They are quadrilaterals; opposite sides are parallel.
A rectangle is a special kind of quadrilateral that has four right angles and opposite sides that are equal and parallel.
There are three main types of quadrilaterals: parallelograms, trapezoids, and kites. Parallelograms have opposite sides parallel and equal in length. Trapezoids have one pair of parallel sides. Kites have two pairs of adjacent sides that are equal in length.