Chapters

Page 3

Counting number of Squares:

Q4). Finding of square where no of row and column are equal.

a).

b).

c).

We can also use the equation given below to solve these questions


Q5). Finding of square if number of rows and column are not same.

      (3 * 2) + (2 * 1) + (1 * 0) = 8 Ans

Let R be the number of rows and C be the number of column then

Total no of squares = (r*c) + {(r-1)(c-1)}  + {(r-2)(c-2)} + ----------


Counting number of Rectangles / Parallelograms:

Let R be the number of rows and C be the number of columns.

Total no of rectangles/parallelograms

= [r + (r-1) + (r-2) + ----+1] * [c+ (c-1) + (c-2 ) + ----+1]

= [2 + (2-1)] * [2 + (2-1)] = 3 * 3 =9 Ans

= (2 + 1) * (2 + 1) = 3 * 3 =9 Ans


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