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answers:
Krishnamurthy say: 9 cm
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Ian H say: Clue 1: A square has both sides the same.
Clue 2: 9*9 = 81
You could have done that on your own.
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Como say: side is 9 cm
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dewcoons say: The area of a rectangle is length times width (A =l*w). A square is a rectangle were all the sides are equal in length. So the area of a square is side times side (A =s ^2).
A = s^2
We know A = 91
91 = s^2
So s is going to be the square root of 81
s = 9
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Prisym say: 9 cm2
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Legendary say: 9cm, not 9cm2. 9cm^2 side is 81cm^4
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alex say: 9cm
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