Determine the total surface area.

Question

Answer 1

We have a triangular right prism

SA = base perimeter * height + 2 * area of base

By Pythagorean Theorem, hypotenuse of right tringle is sqrt(9^2 + 12^2) = 15, so base perimeter is 9 + 12 + 15 = 36

Height of prism is 11.

area of base is 1/2 * 9 * 12 = 54