SOLUTION: A SQUARE HAS A PERIMETER OF 36CM.ITS AREA IS 81CM2.WHAT IS THE LENGTH OF ONE SIDE?

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Question 704855: A SQUARE HAS A PERIMETER OF 36CM.ITS AREA IS 81CM2.WHAT IS THE LENGTH OF ONE SIDE?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
A SQUARE HAS A PERIMETER OF 36CM.ITS AREA IS 81CM2.WHAT IS THE LENGTH OF ONE SIDE?
Let x = length of one side
then
We need only the "perimeter" OR the "area" to establish our equation. Here, I'll use Perimeter:
4x = 36
x = 9 cm
.
If you consider "area":
x^2 = 81
x = sqrt(81)
x = 9 cm