Use a net to find the surface area of the right triangular prism shown below: three rectangles next to each other with a width of 8 feet. the first and second rectangles length are unknown, and the last is 13 feet long. there are two right triangles above and below the last rectangle. one is labeled with a base of 5 feet and a height of 12 feet. 88 square feet 232 square feet 283 square feet 300 square feet