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# Find the number of rectangles in the figure.

Can you answer this question?

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
edited Dec 20, 2013