Question 858203
The key is that her garden is square so the sides are the same length.  We know the diagonal across is 8'.
.
{{{a^2}}}+{{{b^2}}}={{{c^2}}}
2({{{a^2}}})={{{8^2}}} 
2({{{a^2}}})=64
Divide each side by 2
{{{a^2}}}=32
Square root of each side
a = 5.656854249... (square root of 32)
.
Seems like a strange answer.  Let's check it.
(sq rt of 32)^2 + (sq rt of 32)^2 = 8^2
32 + 32 = 64
It's correct.  The length of the sides are "the square root of 32"