Question

How to understand perfect square and nonperfect sqaure?

Answer 1

check whether its sides are in equal lengths.
check its angles are 90° or not

Answer 2

One way is to place all the numbers into a square if it fits it is a. Square

Another way to find out is mentioned bellow

6²= 36 so we can put it as 2×2×3×3 will give us 36

So over here there is a pair of 2 and a pair of 3 which proves it is a perfect square

Hope it helped you