It is: 0.5*4*4 = 8 square cm
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A square with a side length of 4cm has an area of 16cm2
a≈2.83cm The sides are the square root of 8 cm, approximately 2.8284 cm
The diagonal length of a square with a 900 square foot area is: 42.43 feet.
If you take the square of the long side and add it to the square of the short side, you get the diagonal (hypotenuse) squared. Then just find square root of that. For example, if short side is 3cm and long side is 4cm: 9 + 16 = 25, so the diagonal would be the square root of 25 ie. 5.
Each side is 2cm