L refers to one side of the square How to find the surface area of a pyramid?Ī pyramid is a 3D shape with triangular lateral faces and a polygonal base. Therefore, the formula for the surface area of a cube is: The area of the square equals the product of the length of all of its sides. Since the formula for the surface area of a square is: You won’t even need to use a surface area calculator for this. To use this formula, you must first find the base and lateral area using the following equations:Ī(lateral) = h * (2 * π * r) How to find the surface area of a cube?Īmong all of the shapes, the surface area of a cube is the easiest one to find. This formula comes from the equation of a cylinder’s surface area which is: Generally, the formula for the base of a circle is: To solve for the surface area of a cylinder, you need to have two values which are the height and the diameter or radius of the base. When simplified is A = A(lateral) + 2 * A(base) How to find the surface area of a cylinder? Therefore, the final formula to use to find a triangular prism’s surface area is:Ī = h * (a + b + c) + 0.5 * √((a + b + c) * (-a + b + c) * (a – b + c) * (a + b – c)) One of the most common methods is to use Heron’s formula which is typically used when you have the values for all three sides of the triangle. There are several ways to do this depending on the value you have. P refers to the perimeter of the base triangleĪfter this, it’s time to calculate the area of the triangular base. Therefore, the formula is:Ī(lateral) = a * h + b * h + c * h = h * (a + b + c) For this shape, the lateral surface area is quite easy to calculate as it’s made up of 3 rectangles which have one length of the side in common. When simplified is A = 2 * (A1 + A2 + A3) How to find the surface area of a triangular prism?īefore we go to the formula for the surface area of a triangular prism, you must first understand where it’s derived. To find the surface area of a rectangular prism, first perform the calculations to find the areas of the rectangular sides: You can use it to find the surface area of the most common shapes. This is why the surface area calculator is so useful. When you learn how to calculate surface area, this applies to different shapes. How to find the surface area of a rectangular prism?
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