the defnition of find the surface area of triangular prism and cylinder
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To find the surface area of an equilateral triangular prism you take the area of the rectangular sides and the triangular bases and add them up and your done.
The volume of any prism is worked out in the same way whether it's a hexagonal prism, circular prism or a triangular prism. You just need to times the length of the prism against the area of the cross-section.
The answer depends on what measurements you do have.
Side1 + Side2 + Side3
Surface area of the triangle x the length of the prism.