Question 703252
area is length multiplied by width.
because the garden is square the length and width are the same.
Let the length of one side be called x
we can say that the area = x times x
or 
{{{area=x^2}}} which is {{{x^2=164}}}
to find x we need to find a number which, when squared(multiplied by itself) = 164
to 'undo' the square we take the square root.
(there is a button on most calculators which does this)
{{{x=sqrt(164)=12.8062484749}}}
the length of one side is 12.81 inches (to 1 decimal place)