Question

Find the surface area of this triangular prism.

138 square centimeters
144 square centimeters
132 square centimeters
156 square centimeters

Answer 1

Step 1) Find the area of the triangles

1/2(3 x 4) = 6

1/2(3 x 4) = 6

Step 2) Find the area of the rectangles

5 x 11 = 55

4 x 11 = 44

3 x 11 = 33

Step 3) Find the total surface area

SA = 6 + 6 + 55 + 44 + 33

SA = 144 square centimeters

Hope this helps! :)