Since it is a square all sides will be the same. There formula for area is l*w=a. Since l=w and a is given.
let 1 side = x
9=x*x
9=x2
then square root 9 and x2
x=3
So each side is 3 cm.
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Each side is 20 cm
260 cm
Since its a square, it has four sides and each side is the same length. 12 cm/4= 3 cm per side.
A square with a side length of 23 cm has an area of 529 cm2
If the perimeter of a square is 30 cm, each side is 7.5 cm and the area is 56.25 sq cm. For a square to have an area of 30 sq cm each side would have to be 5.48cm.