Answer: 168

Explanation:
The triangle is the base because it is the same as the other triangle across from it. To calculate the base area, the equation is
, which is 12. then, you need to multiply 12 by 2 because there are 2 faces that have the same area, and you get 24 as your base. Then, you need to find the height, which is 7 because it is the length between the 2 triangles. then, you need to multiply 24x7 because the formula for area is
. 24x7 is 168
. That is the surface area. I hope this helped :)