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A [[polygon]] of four sides. Each pair of opposite sides is of equal length. However, the adjacent sides do not need to be of equal length. The adjacent sides also are perpendicular. A specific case is the [[square]].
A [[polygon]] of four sides. Each pair of opposite sides is of equal length. However, the adjacent sides do not need to be of equal length. The adjacent sides also are perpendicular. A specific case is the [[square]].
[[Image:Rectangle.gif]]