Question 685494
In a square all of the sides are equal, so length and width are the same.
...
Are you saying that the area is {{{72in^2}}}?
a = s^2
72 = s^2
{{{sqrt(72) = sqrt(s^2)}}}
...
s = {{{sqrt(36*2)}}}
{{{highlight_green(s = 6sqrt(2))}}}
both length and width are {{{6sqrt(2)}}}
.....................
Have more questions? 
Email: HomeworkHelpers@readingboosters.com
Delighted to help.
-Reading Boosters
Website: www.MyHomeworkAnswers.com 
Wanting for others what we want for ourselves.