are of square = side length x sidelength
alternatively you could take the square root of which the number you have
81= 9x9
so the length of each side is 9
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The area of a square is calculated by multiplying the length of one side by itself. In this case, with sides of length 8, the area would be 8 x 8 = 64 square units.
A square with a side length of 2cm has an area of 4cm2
To find the area of a square: -- Measure the length of any side. In a square, all sides are the same length. -- Multiply that number by itself. ("Square" the number.) Example: If each side of the square is 9ft long, then the area is (9ft times 9ft) = 81 square ftAll four sides of a square have equal length. Call that length 'S'.The formula for area, which we shall call 'A', is:A = S2=======================================Another contributor clarified (?) :Simply, A= area, L= length. W= width A=LW, as in any square that has two equal sides.
A square with a side length of 2 cm has an area of 4 square cm