CBSE - XI Science - Mathematics - Permutations and Combinations
How many rectangles are there in a CHESS BOARD??
When we form a rectangle, we choose two of the vertical lines and two of the horizontal lines. (Notice that our choice of lines determines the size of the rectangle formed.)
So, the number of rectangles is given by the formula:
Hence, For a 8 by 8 chessboard, the number of rectangles is =
Rate this answer
You have rated this answer /10