More important, what is the question? Four different lengths do not define a rectangle.
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The side lengths of a quadrilateral do not uniquely identify the shape, because a quadrilateral is not a rigid shape. It can be flexed so that its area can be varied without changing the side lengths. As an example, consider a rectangle. It can be flexed into a parallelogram which can be made so thin that its area can be made smaller than any given value. Whereas a general quadrilateral may have a residual triangle that cannot be removed, there is a huge range of values for the area.
5:3
15ft x 9ft = 135 square feet.
12 * 9 = 108 square feet = 12 square yards
It is 1699 = 1296 cubic feet