You have not provided a diagram, therefore, I cannot provide you with the exact solution. However, I will try to help you with the procedures on how to get the area of trapezoid and you can apply on the diagram you have.
Now, area of trapezoid can be calculated using the following rule: area of trapezoid = [tex] \frac{b1 + b2}{2} * h[/tex]
where: b1 is the length of the first base b2 is the length of the second base h is the height of the trapezoid The bases are the two parallel sides in the trapezoid
To better illustrate this, consider the attached diagram. We have: b1 = 5 m b2 = 8 m h is the perpendicular height = 4 m Area = [tex] \frac{5+8}{2} *4[/tex] = 26 m²