Question 456261
If a square has an area of 90, then each of its sides is the square root of 90, because Area of a square=s*s where s is the length of a side.
{{{sqrt(90)=3sqrt(10)}}}
So the fencing needed to enclosed it is the perimeter of the square, which would be 4 times the side length.
{{{4*3sqrt(10)=12sqrt(10)}}}