20'x16'x22'x3' what is the sq ft.

By definition, a

If you know nothing else about the geometry but the lengths of the sides, you cannot determine the area in square feet or any other measure.

*rectangle*does not have four*unequal*sides. If the geometry is a*trapezoid*(that is, it has two sides parallel), there is a formula available or you can derive your own using the Pythagorean Theorem.If you know nothing else about the geometry but the lengths of the sides, you cannot determine the area in square feet or any other measure.