Answer:
96cm
Step-by-step explanation:
For a triangular prism we find the surface area by doing base times height/ length times width, but since we have a triangle we would have to divide the answer we get by 2. Once we get all the sides we then would have to add them all up.
front back top
3X4X1/2 ( HINT: ITS THE SAME AS THE FRONT) 7X5
12X1/2 6= back 35= top
6= front
Bottom side since we are done finding all
7X4 3X7 of the area of the shapes we add
28= bottom 21= side all of them together.
Surface area= 6+6+35+28+21= 96 cm
