quadrilateral - a four sided polygon
parallelogram - a quadrilateral with two pairs of parallel sides
trapezoid - a quadrilateral which has exactly one pair of parallel sides
kite - a quadriateral in which two pairs of consecutive sides are congruent
rhombus - a parallelogram which has four congruent sides
diagonal - a segment that connects nonconsecutive vertices of a polygon
height of a quadrilateral - the perpendicular distance between opposite sides of a quadrilateral
