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Trapezium

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

\begin{displaymath}
A={\textstyle{1\over 2}}(a+b)h.
\end{displaymath}

See also Diamond, Lozenge, Parallelogram, Quadrilateral, Rhomboid, Rhombus, Skew Quadrilateral, Trapezoid




© 1996-9 Eric W. Weisstein
1999-05-26