What is the surface area of a triangular prism shaped doorstop with a height of 1.5 inches, a width of 1.5 inches, a length of 5 inches, and a hypotenuse of 5.22 inches?(1 point)
The triangular faces of the prism can be split into two right triangles with legs of 1.5 inches and 2.61 inches (half the hypotenuse). The area of each triangular face is therefore 0.5 * base * height = 0.5 * 1.5 * 2.61 = 1.9575 square inches.
There are two triangular faces, so the total surface area of the triangular prism is 2 * 1.9575 + (5 * 1.5) = 3.915 + 7.5 = 11.415 square inches.
Answer: 11.415 square inches.