Sometimes A, but any letter can be used.
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You cannot directly convert, square metres represents area where as metres simply represent distance. This is very basic maths. If the area was a square, you can find the area in square metres by multiplying the width in metres by the height.
1 cm on the map represents 1oo cm = 1 metre in real life. So 1 sq cm represents 1 sq metre in real life. 6 cm square = 6 cm * 6 cm represents 6 m * 6 m = 36 sq metres.
The formula for the perimeter of a square is P equals 4 times a. 'P' represents the perimeter, and 'a' represents a side of the square.
To get the area of a square, you square the length, ie area = LxL
what it the area of a 5.4 square