How do you figure out the surface area of this triangular prism

Lateral Faces:
Area of bottom face = 1*3 = 3 sq ft
Area of left-facing face = 2*3 = 6 sq ft
Area of slanted face = 3*2.2 = 6.6 sq ft
Total Lateral Surface Area = 3+6+6.6 = 15.6 sq ft



Base Faces:
Each base is a triangle with base 2 and height 1
Area of one base = base*height/2 = 2*1/2 = 2/2 = 1
The total base area is 2*1 = 2 sq ft



The total surface area is therefore 15.6+2 = 17.6
I added together the total lateral surface area (15.6) and the total base area (2)

17.6 square feet