SOLUTION: if the perimeter of a square is 24 in, how long is its diagonal?

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Question 526122: if the perimeter of a square is 24 in, how long is its diagonal?
Answer by Maths68(1474) About Me  (Show Source):
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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%5E2+=s%5E2%2Bs%5E2
d%5E2=6%5E2%2B6%5E2
d%5E2=36%2B36
d%5E2=72
d=sqrt%2872%29
d=8.49
Diagonal is 8.49 inches.