Natasha's backyard is in the shape of a square and that means the length and the width are the same measurement. The area of a square shape is given as
Area = L x W
OR
Area = L² (since the L is the same as the W, it can as well be writen as L x L which is L²)
If the area of her backyard is given as 4096, then
Area = L²
4096 = L²
Add the square root sign to both sides of the equation
√4096 = L
64 = L
Therefore, one side of Natasha's backyard is 64 feet long