Simply measure it and the parallel bases of a trapezoid will have different lengths.
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you have to work backwards to find your answer. once you have the area, you have to do a= height times (base 1 + base 2) divided by two.
The height of the trapezoid is also needed to find its area which is as follows:- Area of a trapezoid = 0.5*(sum of bases or parallel sides)*height
The perimeter of a trapezoid is the sum of the lengths of each side. To find the area of a trapezoid: add base 1 and base 2 together then divide that answer by 2, then multiply it by the height of the trapezoid.
The area of a trapezoid is 1/2 * (base 1 + base 2) * height, so the area of this trapezoid = 0.5*(3+7)*3 = 15 square yards
The volume of any right prism is the area of the base, in this case a trapezoid, multiplied by the height of the prism. The formula for the area of a trapezoid is A = 1/2h(a + b) where a and b are the bases of the trapezoid (the parallel sides). Once you calculate the area of the trapezoidal base of the prism, multiply that number by its height to get its volume.