Quadrilateral Definitions
Quadrilateral - A polygon with four sides·
Parallelogram - Quadrilateral in which both pair of opposite sides are parallel·
Rhombus - A parallelogram with four congruent sides·
Rectangle - A parallelogram with four right angles·
Square - A rectangle with four congruent sides·
Kite - A quadrilateral in which one diagonal is the perpendicular bisector of the other diagonal [and consecutive sides are not congruent - included in some definitions] [A quadrilateral that has two pairs of congruent sides, but opposite sides are not congruent]