Observe the rectangle given below
If we rearrange the dots and make this rectangle a square, then what will be the side of that square.
We observe that we have 2 rows and 8 columns in the rectangle.
Total number of dots in given figure =2×8=16.
Let 'a' be the side of the square which we get after rearranging the dots of this rectangle.
Total number of dots in that square =a2
Since the total number of dots is 16
So, the side of the square will be equal to 4.