To find the surface area,we would need to find all the area of the pieces of prism.
Here's the equation
area of the two triangles
=6×3÷2×2
=9×2
=18cm^2
area of the rectangles
=9×4+6×9+9×5
=36+54+45
=135cm^2
thus,the total surface area is
=18+135
=153cm^2
hope it helps!
