a quadrilateral with both pairs of opposite sides parallel
Parallelogram
a parallelogram with four congruent sides
Rhombus
a parallelogram with four right angles
Rectangle
a parallelogram with four congruent sides and four right angles
Square
a quadrilateral with two pairs of adjacent sides congruent and no opposite sides congruent
Kite
a quadrilateral with exactly one pair of parallel sides
Trapezoid
a trapezoid whose nonparallel opposite sides are congruent
Isosceles Trapeziod