What is the total surface area of the triangular prism shown? 12 in.
9 in.
10 in.
15 in.

i belive those are the ones that are under 90 degreese.

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol

it would be r^2 - 2rs +s^2

assuming   you mean to square it