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.
[tex]\begin{gathered} A=4\cdot5+4\cdot5+4\cdot5+\frac{1}{2}\cdot4\cdot3.5+\frac{1}{2}\cdot4\cdot3.5 \\ =20+20+20+7+7 \\ =74 \end{gathered}[/tex]
So total surface area of triangular prism is 74 meter square.
