Because it is the base times the height.
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feet squared
For a rectangle:A= 2L+2WA= 2(23)+2(29)A= 46 + 58A = 104ft Squared..Be sure to put Squared at the end of your answer, which is an exponent of 2 after "ft". Anything that deals with area always has a squared solution.
A = S squared is the formula for area of a square A = area S = lenght of side
The area of rectangle is : 18.0
A centimetre squared is a measure of area; it can have any shape. The easiest area of 1 centimetre squared (to draw/visualise) is a square with one centimetre on each side.