This is one I got right on my quiz!
At first I got this one wrong because I multplied the base times the height and did not delete or subtract the two triangles at the top.
I know how to get the surface area of this prism. I get the area of each face then multiply those by 2 becasue there are two faces of each size. Add all the areas to get the surface are for the entire polyhedron.
I almost got this one right except that I did not get the area of the triangle right. I have to find the height and ignore the side then I have to remember to divide by two!