Question

Find the surface area of the prism 3m 4m 8m 5m

Answer 1

3 x 4 = 12, 12 divided by 2 ) x 1/2) = 6, 6 x 2 = 12(area of two triangles)

8 x 4 = 32

8 x 3 = 24

8 x 5 = 40

Let's add all the given areas:

12 + 32 + 24 + 40 = 108 m^2 is your answer.

Answer 2

Explanation:

Two triangles.

one triangle = 1/2 * small leg * middle sized leg

one triangle = 1/2 * 3 * 4

One triangle = 6

Two triangles = 6 * 2 = 12

Front

Area = L * W

L = 8

W = 5

Area = 8*5 40

Left Side

L = 8

W = 3

Area = 8*3

Area = 24

Area= 24

Right Side

L = 8

W = 4

Area = 32

Total Area = 32 + 24 + 40 + 12 108

There is another way to do this.

Since the height is the same for all three faces, you can do it like this

Area = 8*(3 + 4 + 5) = 8(j12) = 96

Area of the two tiangles = 12

Total area = 108