Check the picture below.
so the figure is really two triangles and one trapezoid.
the yellow triangle has a base of 3, height of 2.
the pink triangle has a base of 6, height of 1.
the trapezoid has a height of 6, and bases of 7 and 9.
[tex]\bf \stackrel{\textit{area of yellow triangle}}{\cfrac{1}{2}(3)(2)}+\stackrel{\textit{area of pink triangle}}{\cfrac{1}{2}(6)(1)}+\stackrel{\textit{area of trapezoid}}{\cfrac{6(7+9)}{2}} \\\\\\ 3+3+48\implies 54[/tex]
