There are two common definitions of the trapezium. The American definition is a Quadrilateral with no
Parallel sides. The British definition for a trapezium is a Quadrilateral with two sides
Parallel. Such a trapezium is equivalent to a Trapezoid and therefore has Area
See also Diamond, Lozenge, Parallelogram, Quadrilateral, Rhomboid, Rhombus, Skew Quadrilateral, Trapezoid