Volume of a triangular prism explained with pictures, examples and practice problems Math Warehouse. Surface Area. To find the volume of a prism (it doesn't matter if it is rectangular or triangular) we multiply the area of the base, called the base area B, by the . 3 dek 2015 - Triangular prisms have their own formula for finding surface area because they have two triangular faces opposite each other. The formula is . 24 iyl 2018 - Whether it's a sphere or a circle, a rectangle or a cube, a pyramid or a triangle, each shape has specific formulas that you must follow to get the . 28 yan 2016 - 'surface area' = bh+2ls+lb If you think it is too long to remember, just find the area of each of the shapes on it and . surface area=bh+2ls+lb . triangle = (1/2) b h . [s(s-a)(s-b)(s-c)] when s = (a+b+c)/2 (Heron's formula) . Volumes. cube = a3. rectangular prism = a b c. irregular prism = b h. cylinder = b h . 15 may 2017 - The surface area of a triangular prism can be found in the same way as any . To find the area of the rectangular sides, use the formula A = lw, . Plug the triangular area into the formula to find the volume of the prism. . To find the surface area of a triangular prism, you would find the area of all the faces, .