Question

The length of the diagonal of a square is 8 inches.

What is the area of the square?

Answer 1

diagonal of a square = \[\sqrt{2} x\]
where x = side of the square

Now area os a square = \[x^2 = 2x^2/2 = (\sqrt{2} x)^2/2\]
So square the diagonal and divide it by 2 to get your answer