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A '''trapezoid''' (british: trapezium) is a four-sided [[polygon]] with two [[parallel]] sides.

A '''trapezoid''' (British: [[trapezium]]) is a four-sided [[polygon]] with two [[parallel]] sides.

[[Image:trapezoid.gif]]

[[Image:trapezoid.gif]]

Note: in british usage, the word 'trapezoid' refers to what in american usage is called [[Trapezium|trapezium]].

The following properties arise from the definition:

* Two of the pairs of adjacent angles sum to 180^o

* The area of the trapezium is the average of the parallel sides multipleied by the distance between them.  

 

 

 

[[Category:Geometry]]

[[Category:Geometry]]