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Area of a square= Width x Height. Since all sides of a square are equal you can use the formula S2. Since you already know the area is 81, just take the square root which will give you 9.

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Q: How do you find the length of a square if its area is eighty one?
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Related questions

The area of a square is 25 square yards find the length of a side?

All four sides of a square are of equal length. To find the area, you square the length of one side. To find the length of one side from the given area, find the square root of the area. In this case, the square root of 25 is 5. Hence, the length of a side is 5 yards.


How do you find area of a square?

To find the area of a square you multiply its length by its width.


How do you find area of a square that has sides of length 96 inches?

how do you find area of a square that has sides of length 96 inches


How do you find length from area of square?

Take the square root of the area.


How do you find the length of rectangle or square if the area and width are known?

For a rectangle or square, Area = Length * Width So Length = Area / Width.


How do you find the area of a square and a rectangle?

Multiply the length and width to find the area of both a rectangle and square.


How can you find the length of line segments on dot paper?

Make the segment into a square, find the area of the square, then find the square root of the area because the square root is equal to the side length


How do you find the length of the side of a square with only the area?

To find the area of a square, where all four sides are of equal length, you simply square the length of one side: for example, the area of a square of four inches is sixteen square inches, or 42 in. To find the length of the side of a square when you only know the area, you simply reverse the process, and take the square root of the area. The square root of 16 is four, for example.


How do you find the sides of a square if you have area?

Length of side = square root of area


How do you find the length and width of a square if given the area?

i think you find the square root of the area. that's the length and the width, so you multiply it.


Find the length of a square which has an area of 3721?

area is length times width Answer is 61


How can you find the length of a side on a square if you know the square root?

The square root of what? If you take the square root of the area, the answer will be the length of the side. If the area is, for example, in square meters, the length of a side will be in meters.