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Rectangle | ![]() |
In geometry, a rectangle is defined as a quadrilateral where all four of its angles are right angles.
From this definition, it follows that a rectangle has two pairs of parallel sides of equal length; that is, a rectangle is a parallelogram. A square is a special kind of rectangle where all four sides have equal length; that is, a square is both a rectangle and a rhombus. A rectangle that is not a square is colloquially known as an oblong.
(source: Rectangle. (2006, November 1). In Wikipedia, The Free Encyclopedia. Retrieved 17:21, November 3, 2006, from http://en.wikipedia.org/w/index.php?title=Rectangle&oldid=85098034)
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