Question

Find the surface area of the right triangular prism (above) using its net (below). units

Answer 1

Answer:

96

Step-by-step explanation:

Answer 2

Given:

Right triangular prism

To find:

The surface area of the right triangular prism

Solution:

Using nets of the prism:

Area of large rectangle = length × width

                                       = 7 × 5

Area of large rectangle = 35 square units

Area of middle rectangle = length × width

                                          = 7 × 4

Area of middle rectangle = 28 square units

Area of small rectangle = length × width

                                       = 7 × 3

Area of small rectangle = 21 square units

Area of top triangle = $\frac{1}{2}bh$

                                 $=\frac{1}{2}\times4\times3$

Area of top triangle  = 6 square units

Area of bottom triangle = $\frac{1}{2}bh$

                                        $=\frac{1}{2}\times4\times3$

Area of bottom triangle  = 6 square units

Total surface area = 35 + 28 + 21 + 6 + 6

                               = 96 square units

The surface area of the right triangular prism is 96 square units.