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Example: Finding Altitude of Trapezium

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Trapezoid (AmE)
Trapezium (BrE)

A Trapezoid



Edges and vertices






In geometry, a quadrilateral with one pair of parallel sides is referred to as a trapezoid in American English and as a trapezium in English outside North America. A trapezoid with vertices ABCD is denoted  ABCD or ABCD.

This article uses the term trapezoid in the sense that is current in the United States (and sometimes in some other English-speaking countries).Readers in the United Kingdom and Australia should read trapezium for each use of trapezoid in the following paragraphs. In all other languages using a word derived from the Greek for this figure, the form closest to trapezium (e.g. French 'trapèze', Italian 'trapezio', German 'Trapez', Russian 'трапеция') is used.



The area A of a trapezoid is given by

where a and b are the lengths of the parallel sides, and h is the height (the perpendicular distance between these sides) (Our solved example in mathguru.com uses this concept)




The above explanation is copied from Wikipedia, the free encyclopedia and is remixed as allowed under the Creative Commons Attribution- ShareAlike 3.0 Unported License.