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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.

see also
  • Cone
  • Triangle - Pythagorean theorem
  • Cuboid
  • Spherical cap
  • Cylinder

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    Fill the yellow fields to see the result in the green fields!
      A
    B
    C
    D
    E
    1          
    2 width       
    3 height       
    4          
    5 area    m2     
    6 admeasurement       
    7          
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    (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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