Parallelogram -- 2 pairs of parallel sides
Trapezoid -- exactly 1 pair of parallel sides
Rhombus -- 4 congruent sides
Rectangle -- 4 angles congruent
Square -- four angles and sides congruent
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Some are, and some are not. A parallelogram is a special kind of quadrilateral ... one in which every side is parallel to the one across from it. So all parallelograms are quadrilaterals, but there are also a lot of other quadrilaterals that are not parallelograms.
Its basically a hierarchy just for quadrilaterals.
Not all quadrilaterals are rectangles. Some quadrilaterals are rectangles, and the rest are not. However, all rectangles are quadrilaterals.
They are called Quadrilaterals.
Here are the quadrilaterals you are expected to know about.SquareRhombusRectangleParallelogramTrapeziumKite