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Grade: 12th pass
        How to find number of rectangle in square size shape chess board of any dimension?
2 years ago

Answers : (3)

Umakant biswal
5349 Points
							
rectangle is formed by two vertical and two horizontal lines. On an 8x8chessboard, you can choose two vertical lines in C(9, 2) = 9!/(2!*7!) = 36 different ways. Similarly you can choose two horizontal lines in 36 different ways. So, the answer is 36*36 = 1296.
in the same way u have to find out for others also ./ 
HOPE IT CLEARS ..

 
2 years ago
Prashant yadav
18 Points
							But sir in this there are some cases when two adjacent vertical lines and two adjacent horizontal lines they will form square not rectangle and there are many other cases like this sir please clear my doubt
						
2 years ago
anjali
26 Points
							Hello first clearing your doubt    all squares are rectangles         now answering your question if there are m rows amd n columns then the number of rectangles are nC2×mC2
						
one year ago
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