Part a : Net A because when you fold it up it will look like the wanted prism
Part b : AB = 3 in BC = 5 in CD = 7.2 in
Part c : area of one triangle = 4*3 = 12 / 2 = 6 6 * 2 = 12 (because there are 2 triangles) 7.2 * 3 = 21.6 7.2 * 4 = 28.8 7.2 * 5 = 36 Add them all up : 12+21.6+28.8+36 = 98.4 So surface area is 98.4 in
