Question

The figure below is a net for a triangular prism. What is the surface area of the triangular prism, in square feet?

Answer 1

The figure consists of,

A rectangle with dimension 15 ft by 7 ft.

Two triangles with base b = 7 ft and height h = 5 ft.

A rectangle with dimension 15 ft by 5 ft.

A rectangle with dimension 15 ft by 8.6 ft.

Determine the surface area of triangular prism.

$\begin{gathered} A=15\cdot7+2\cdot\frac{1}{2}\cdot7\cdot5+15\cdot5+8.6\cdot15 \\ =105+35+75+129 \\ =344 \end{gathered}$

So, surface area of triangular prism is 344 square feet.