Surface area of any prism is the total area of all its sides and faces. Points to focus on: ↪There are 2 triangles(equal in area) , 2 rectangles( not equal) & a rectangular base in this triangular prism. ↪Find area of each triangles , base and rectangles & add them up ,to get surface area of the prism.
Area of 2 equal triangles: A1=2×(1/2)×8×15=120 sq feet ↕ [As area of a right angled=1/2×(b×h) ]
Area of small rectangle: A2==l×b=8×5=40 sq feet
Area of slanted rectangle: A3=L×b=17×5=85 sq feet
Area of rectangular base: A4=15×5=75 sq feet
Finally, the surface area of prism is: A=A1+A2+A3+A4 =120+40+85+75 =320 sq feet➡ANS
Since the y value is the same this isn't going to be hard to find out. all you need to do is add + 1 to the first x value enough times that you reach 10 which is 13 and the y value is the same so it's also a zero slope.
