the area of the trapezoid will be
[tex]A=\frac{1}{2}\times(summationofparallelside)\times height[/tex][tex]\begin{gathered} A=\frac{1}{2}\times(80+66)\times30 \\ A=\frac{1}{2}\times146\times30 \\ A=2190 \end{gathered}[/tex]so the area of trapezium is 2190 square feet.