Question

Find the surface area of the prism.

Answer 1

17.3 ft

Explanation:

To find this, we have to add up the areas of the 3 rectangular faces and two triangular faces.

Let's find the areas of the triangles first

We just have to multiply base and height then divide it by 2

2 x 1 = 2

2 ÷ 2 = 1

Since there are two identical triangular faces, multiply that number by 2

1 x 2 = 2

Now let's find all the areas of the rectangular faces with l x w

1 x 3 = 3

2 x 3 = 6

3 x 2.2 = 6.6

6.6 + 6 + 3 = 15.3

Now add up the areas

15.3 + 2 = 17.3