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  • Number of rectangles on a chess board equals Option: 1 1296 Option: 2 1440 <

Number of rectangles on a chess board equals 

Option: 1

1296 


Option: 2

1440 


Option: 3

1125


Option: 4

1020 


Answers (1)

best_answer

In chess board we have 9 horizontal and 9 vertical lines

To make a rectangle, we have to select 2 distinct horizontal and 2 distinct vertical lines.

This can be done in 9C2.9C2 ways, this equals 1296 

Posted by

Rishabh

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