Area of square = \(s^2\) where, \(s\) is the side length of the square.
\(81=s^2\)
\(9=s\)
s must be positive since it is a side length, so the negative root of 81 is rejected.
Perimeter= \(4s\)
Perimeter=\(4(9)=36\) \(inches\)
+865 Well, let's make the area "a".
And to calculate an area is a^2.
So if we want to find just one side, we can square root it:
sqrt"a".
In this case, it's sqrt81 = 9.
Which means that one side is 9.
To find the perimeter of a square, we multiply by 4, or we can add up one side 4 times:
9*4 OR 9+9+9+9 = 36.
Perimeter = 36
