SOLUTION: The perimeter of a square whose area is 81 square centimeters is?

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Question 174625: The perimeter of a square whose area is 81 square centimeters is?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
All 4 sides of a square are equal in length
Let each side of the square = x
The perimeter will = 4x
The area of any rectangle = length x width
In the square, the legth and width are the same, so
Area = x%5E2
It is given that
Area = 81 cm2 , so
81+=+x%5E2
Take the square root of both sides
x+=+9 cm
Since the perimeter = 4x
Perimeter = 4%2A9+=+36 cm