The formula for the area of a square is:
A = s²
Area = side²
We know that area (A) is 20 ft²
20 = s²
Now we must find the length of the side (s). To do this we must get rid of the square. To remove the square from s take the square root of both sides:
√20 = √s²
s ≈ 4.5 ft <<< approximate answer
To find the exact answer you must simplify the square root:
s = 2√5 ft <<< exact answer
Each side of the square is exactly 2√5 or approximately 4.5
Hope this helped! Let me know if you have any further questions
~Just a girl in love with Shawn Mendes