If patio is square it means that area of if is \(A=a^2\) where a is one side
Now we can substitute A=200 and solve eq
\(a^2=200\)
a=\(\sqrt{200}\)
a=14.1421
Now we are rounding to the nearest tenths
a=14.1 because next number is 4 and is less then 5.
The result is 14.1