Question

What is the answer for this one?

Answer 1

1. Find the SA of all of the parts:

SA of Triangle parts:

We won't be doing 5x6x1/2 because if we want the surface area of 2 areas, then we will just do normal (5x6)

(2 × 8 2) + (3 × 10 2)

SA: B x H

    : 5 x 6

    : 30

The surface area of the triangular parts is 30cm²

SA of Large Rectangular (in the middle) part:

SA: L x W

    : 6 x 16

    : 96

The surface area of the rectangular parts is 96cm²

SA of Large Rectangular (top&bottom) part:

SA: L x W x 2

    : 16 x 8 x 2

    : 256

The surface area of the rectangular parts is 256cm²

2. Add all the SA's to get FINAL answer:

30+96+256=382

So hence, The SA of the Triangular prism is: 382cm²

:D