A square with side lengths of 20 meters has an area of 400 square meters.
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You cannot. A square metre (m2) is a measure of area, with dimensions [L2]. A linear metre (m) is a measure of distance, with dimensions [L]. Basic dimensional analysis teaches that you cannot convert between measures with different dimensions such as these without additional information. But suppose you have a square with an area of 20 square meter (m2). The sides of this square will be the square root of 20 m2 = (√20) m = 4,472 m. A rectangle that is 4 meter x 5 meter will also have an area of 20 m2.
Area = pi*102 = 314.159 square meters to 3 decimal places
The area of square is : 144.0
One square meter of area.
A square 1 meter long and 1 meter wide is 1 square meter. 1 square meter equals 1.19599 square yards 1 square meter equals 10.76391 square feet