The Compendium Geometry is an eBook providing facts, formulas and explanations about geometry. 
Home Analytic Geometry Quadrilateral Rectangle and Square  
See also: Quadrilateral  General Definitions, Parallelogram and Rhombus  
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Rectangle and SquareA rectangle is a closed planar quadrilateral with opposite sides of equal lengths having four right angles. A square is a degenerate rectangle with all sides of equal lengths, a = b. The following table lists the most important parameters of rectangles and squares:
The center of gravity G as well as the center of the circumcircle lie at the intersection of the diagonals. Note that a rectangle does not have an incircle. For a square the center of the incircle lies at the intersection of the diagonals, too.


Home Analytic Geometry Quadrilateral Rectangle and Square 