Question 526122
One side of square = s
Diagonal = d
4s=Perimeter of square
4s=24
s=24/4
s=6

One side of the square is 6 then other side will be 6 as well.

{{{d^2 =s^2+s^2}}}
{{{d^2=6^2+6^2}}}
{{{d^2=36+36}}}
{{{d^2=72}}}
{{{d=sqrt(72)}}}
{{{d=8.49}}}

Diagonal is 8.49 inches.