Question

Did I do this correctly?​

Answer 1

No, The answer should be 240

Explanation:

1. The first step to finding the Surface Area was done well and was right but you got confused when trying to add the area of each shape
2. There is 3 Rectangles and 2 Traingles.
3. Let's start with the area of the triangles. 1/2bh is the formula for finding area of Traingles. 1/2(4)(6) = 12. We have two Traingles so that would be 24.
4. Now we have three rectangles with different lengths we need to calculate.
5. Rectangle 1 = 12 * 8 = 96
6. Rectangle 2 = 12 * 6 = 72
7. Rectangle 3 = 12* 4 = 48
8. 24+96+72+48 = 240.
9. So, the surface area of the rectangular prisim is 240