Question

Find the surface area of the triangular prism. The base of the prism is an isosceles triangle.

Answer 1

Check the picture below.

so let's simply get the area of each rectangle and the two triangles.

`\stackrel{ \textit{\LARGE Areas} }{\stackrel{ \textit{two rectangles} }{2(41)(48)}~~ + ~~\stackrel{rectangle }{(18)(48)}~~ + ~~\stackrel{ \textit{two triangles} }{2\left[ \cfrac{1}{2}(\underset{b}{18})(\underset{h}{40}) \right]}} \\\\\\ 3936~~ + ~~864~~ + ~~720\implies \text{\LARGE 5520}~cm^2`