To start, find the area of the triangles. The formula for the area is B times H divided by 2. To find the base, add 1.5 plus 1.5. The answer to that is 3, so the base is 3. The height is 2.6, so now you need to multiply 3 by 2.6. The answer to that is 7.8, so the last step to find the area is 7.8 divided by two. The answer to that is 3.9, but there is also another triangle on the back of the triangular prism, so 3.9 times 2 is 7.8. Yes, I know you could just easily just do 7.8 as the answer to both areas, but whatever, we already did that. The second to last step of finding the surface area is finding the area of the rectangle faces. The formula for that is L times W, so the length is 5 and the width is 3. Multiplying those together gives us the answer of 15, and since there are two rectangles, the final area of both rectangles is 30. The last step is to add 7.8 to 30, giving us the final surface area of 37.8!