A hexagon and a rectangle.
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Squared. When you find surface area, you are only finding the area of the shapes that make up the three-denominational shape.
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 can be found by calculating the area of the base and multiplying it by the height of the prism. Recall that a prism is a solid shape composed of a base that is a polygon. By translating that base "up" and adding the "sides" to create the solid shape, you have constructed the prism. And now you can calculate its volume.Note that the base could be triangular, or could be a square, a pentagon, hexagon, or any other polygon. Standard rules apply for calculating the areas of these polygons.
Surface area of the triangle x the length of the prism.
Because if they were such shapes as triangles, it would be hard to use up the extra volume area since most object shapes aren't shaped like wedges, you would have unused space. Keep in mind there are rectangular boxes too.