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Find the number of rectangles in the figure.

       
       
       

 

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There are 5 vertical parallel lines and 4 horizontal parallel lines.
At a time two vertical lines and two horizontal lines are to be selected
to form a rectangle.
$\therefore$ No. of rectangles = $^5C_2.^4C_2$
$=10\times 6=60$

 

answered Aug 20, 2013 by rvidyagovindarajan_1
edited Dec 20, 2013 by meenakshi.p
 

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