A) a square has an area of 121 cm^2. what is the length of each side? b) a square has a perimeter of 28m . what is the length of each side?

A square has equal sides. To find the area, you multiply the length and the height.
x*x=121
x^2=121
x=11
The length of each side is 11

A square has equal sides. To find the perimeter, you add all the sides together.
x+x+x+x=28
4x=28
x=7
The length of each side is 7