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Home Mathematics Analytic Geometry Quadrilateral Trapezoid
See also: Quadrilateral - General Definitions 

Trapezoid

A trapezoid is a quadrilateral with two sides (a and c) parallel.

The central median m is equal to (a+c)/2. The area of the trapezoid can be calculated by

A = hm.

A trapezoid in which the base angles are equal (and thus with equal sides b and d) is called an isosceles trapezoid. A right trapezoid has two adjacent right angles.

Last Update: 2005-Aug-16