Therefore, the length of a candy bar is 2 inches. Here are the steps to compute the surface area of a triangular prism: 1. The following formula can be used to get the base area of a triangular prism:ġ46014 = 2A + (416) x (350) ġ46014 – 145600 = 2A This is just a square, or it would be the base times the. Step 3: The volume of the given triangular prism base area × length 93 × 15 1353 cubic inches. 3) Use the formula: Perimeter of Base X Height. Step 2: The length of the prism is 15 in. To find the surface area of a prism, follow the 5 steps: 1) Determine the height of the prism. So its area is found using the formula, 3a 2 /4 3 (6) 2 /4 93 square inches. Its actually a little bit easier when youre dealing with the cube, where you really just want to find the area of this surface right over here. Step 1: The base triangle is an equilateral triangle with its side as a 6. Therefore, the surface area of the given prism is 140 square centimeters.Įxample 2: A triangular prism has a surface area of 146014 square millimeters, a height of 350 millimeters, and a base perimeter of 416 millimeters, find the area of the base of this prism. Formulas for Surface Area of a Right Triangular Prism. Step 1: Create a net for the triangular prism by 'cutting' two edges of the triangular faces and unfolding. An isosceles right triangle is a special right triangle, sometimes called a 45-45-90 triangle (its so special we made a tool just for it, the 45 45 90 triangle calculator). The formula for finding a triangular prisms volume is the area of the triangle (Width x Height x 1/2). So if you can find the base (it could be a triangle, rectangle, parallelogram, etc.) and can calculate the area and perimeter, you can find the surface area. The following formula can be used to get the surface area of a triangular prism : Example 1: If a triangular prism has a base area of 7 square centimeters, a height of 9 centimeters, and a base perimeter of 14 centimeters, what is its surface area?