2 Answers

SridharS · Answer 1 · 2019-12-21T10:20:13+0000

Area of a square is A=side^2 since it a sqaure all sides are equal.
81=s^2 take the square root
s=9
Perimeter is p=4s since all sides are equal
So p=4(9)
p=36

Daniel Schreij · Answer 2 · 2019-12-27T05:20:44+0000

The area of a square is x^2 where x is the length of a side. If the area is 81, that means one side is sqrt(81). There are 4 sides so the perimeter is 4sqrt(81) = 4*9 = 36 cm.

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