y and j are the vertexes. Given that M and S are the corresponding parts of the 2 triangles, I would say you picked the right answer. But the question is ambiguous and there might be some hidden meaning why this is wrong. The reason might not stand up in a court of law, but instructors do hold the gun at your head.
you have to find the area of the rectangle at the bottom and then find the area of the 2 long triangles and the 2 small triangles and add them together
