-- Both pairs of sides of a rectangle are parallel.
Only one pair of sides of a trapezoid are.
-- A rectangle is a parallelogram.
A trapezoid isn't.
-- The opposite sides of a rectangle are equal.
The opposite sides of a trapezoid aren't.
-- All of the angles of a rectangle are right angles.
The angles of a trapezoid aren't.
-- The area of a rectangle is the product of (length) times (width).
The area of a trapezoid is (height) times (the average of the two bases).
