PARALLELOGRAM: is a quadrilateral whose opposite sides are parallel. trapezoid is a quadrilateral having two parallel sides called bases.

SPECIAL PARALLELOGRAMS: RECTANGLE, RHOMBUS, SQUARE

Rectangle: is an equiangular parallelogram.

Rhombus: is an equilateral parallelogram.

Square: is an equilateral and equiangular parallelogram.

Venn Diagram of the special parallelograms