SOLUTION: A square cardboard has an area of 81 cm2. Find its perimeter

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Question 789031: A square cardboard has an area of 81 cm2. Find its perimeter
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
It's area is 81 cm^2, so it's side length is sqrt%2881%29+=+9 cm. So it's perimeter is therefore 4*9 = 36 cm