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If I'm correct, the area of a square, or any rectangle (a square is also a rectangle) = side x side.

Since all sides of a square are = to each other, the area of a square = length of one side, squared.

So you'd need the square root of 81 to find the length of one side = 9. Perimeter of an object is the sum of it's sides. Square has 4 sides, so 9+9+9+9 = 36

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Q: What is the perimetre of a square if it has an area of 81 cm2?
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The area of a square is 81 cm2 What is the length of one of the sides?

9


What is the perimeter of a square if it has a area of 81 centimetre squares?

Area of square = 81 cm2 so side of square = 9 cm and then perimeter = 4*side = 36 cm.


What is the width of a square with an area of 81 cm2?

Use your calculator to calculate the square root of 81. Or use trial-and-error, to see which number, when multiplied by itself, gives you 81. (Hint: In this case, it is an integer.)


What is 9cm square?

This is one of those areas where there is ambiguity.A 9 cm square is a square whose sides are 9 cm and which therefore has an area of 81 cm2.But 9 cm2 represents an area of 9 square centimetres. The shape of this area is unspecified.When written in the above form, the ambiguity is less obvious but in spoken form it is.


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A cube has six faces. Therefore, its surface area is 6 times a face's area.The area of a square whose edges measure 9 cm is 81 cm2.Therefore, the surface area of a cube whose edges measure 9 cm is 6*81 = 486 cm2.


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The length of a square with an area of 81 would be 9.


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