surface area of triangular prism
has 2 bases with same area (both triangles)
3 rectangle sides that are height 11 and we need to find the other sides
we need the sides of the base to find the rectangles
12/2=6
pythagoren theorem
6^2+8^2=c^2
36+64=c^2
100=c^2
10=c
2 sides are 10
so
bases are 1/2 times 12 timm es8 times 2 since 2 bases=96
sides
height for all is 11
legnth is 12 for 1 and 10 for other 2
11*12+11*10+11*10=352
add
96+352=448
answer is 448cm^2