Calculate the area of the trapezoid by decomposing it into triangles and rectangles.

First start out with the square in the middle. The area is the base ties the height which are both 7. So 7 times 7 is 49.

Then for the triangles, the area is the base x height x 0.5

So  3x7x0.5= 10.5    There are two triangles so the area for the other one is the same. 10.5

Now add all of them together 49+10.5+10.5

I think that's how you do it. Its been a while since I did that math