Exercise 22 Page 780

The surface area of a triangular prism is the sum of the areas of the two triangular bases and the three rectangular faces. Let's calculate the area of the triangular bases and the area of the rectangular faces one at a time. Then we can add them together.

Triangular Bases

The area of one triangular base is about $173$ square centimeters. Because both of the triangular bases are exactly the same, we know that the area of the second triangular base is $173$ square centimeters as well. Let's add them together!