Step 1: Find the area of both the base triangles using the formula, Area of 2 base triangles = 2 × (1/2 × base of the triangle × height of the triangle) which becomes 'base × height'.Let us understand this using the following steps: The only difference is that in a right triangular prism the 3rd side of the base becomes the height of the prism since it forms a right-angled triangle. The surface area of a right triangular prism can be calculated in the same way as we calculate the surface area of a triangular prism. How to find the Surface Area of a Right Triangular Prism? The formula that is used to calculate the surface area of a triangular prism is, Surface area = (Perimeter of the base × Length of the prism) + (2 × Base Area) = (S 1 + S 2+ S 3)L + bh where 'b' is the bottom edge of the base triangle, 'h' is the height of the base triangle, L is the length of the prism and S 1, S 2 and S 3 are the edges of the base triangle. What is the Formula for the Surface Area of Triangular Prism? The rectangular faces are said to be the lateral faces, while the triangular faces are called bases. ![]() A triangular prism has three rectangular faces and two triangular faces. The surface area of a triangular prism is defined as the sum of the areas of all the faces or surfaces of the prism.
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