Question

the net of a triangle prism and its dimensions are 3.5m, 4m, 4m, 4m and 5m. what is the total surface area of the prism

Answer 1

In the triangular prism there are 3 rectangle with each length of l =4 m and width of w = 5m.

The two trienagle with base b = 4 m and height of h = 3.5.

Determine the total surface area of prism.

`\begin{gathered} A=4\cdot5+4\cdot5+4\cdot5+(1)/(2)\cdot4\cdot3.5+(1)/(2)\cdot4\cdot3.5 \\ =20+20+20+7+7 \\ =74 \end{gathered}`

So total surface area of triangular prism is 74 meter square.