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Calculation of the perimeter and area of a right trapezoid, that is, a trapezoid with one of the sides perpendicular to the parallel bases. The data of the problem are all the sides except one of them, which will force us to apply the Pythagorean theorem. To find the area we have to remember the expression for the area of a trapezoid: A=(B+b)h/2, where B is the larger base and b the smaller base, while h is the height of the trapezoid.