A square with a side length of 20 units has an area of 400 square units.
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Area = 20*10 = 200 square units
About 8.94 units if the area is 5 square units. If the square is 5 inches per side the perimeter is 20 units.
A = 25 square units.
20 by 20 units of measurement
The area of square is : 400.0