Triangular prism surface area If you want to calculate the surface area of the solid the most well-known formula is the one given three sides of the triangular base. Triangular prisms have their own formula for finding surface area because they have two triangular faces opposite each other. The Formula for the surface area of a right triangular prism is calculated by adding up the area of all rectangular and triangular faces of a prism.
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Where B is the area of the triangular base of prism. SA bh s1 s2 s3H In the above formula b the base and h the height of the triangle s1 s2 and s3 the length of each side of the triangle and H the prisms height which is the same as the rectangles length. S lat lateral surface area. To find the surface area of a triangular prism use the formula Surface Area L 2B where L is the lateral area and B is the area of the base.