Its total surface area can be calculated using the formula, (1/2) Pl + B. The formula which is used to find the surface area of a pyramid can be calculated using the slant height. How to Find Surface Area of Pyramid With Slant Height? Where 'B' is the base area, 'l' is the slant height, and 'P' is the base perimeter. The formula that is used to find these two areas is given below. There are two types of surface areas of a pyramid, one is the total surface area and the other is the lateral surface area. What is the Formula for Surface Area of Pyramid? The lateral surface area of a pyramid is calculated using the formula LSA = (1/2) Pl, where 'P' is the perimeter of the base and 'l' is the slant height. The lateral surface area of a pyramid is the sum of the areas of all its side faces (which are triangles). What is the Lateral Surface Area of Pyramid? The total surface area of a pyramid whose base perimeter is 'P', the base area is 'B', and slant height is 'l' is calculated using the formula TSA = (1/2) Pl + B. The total surface area of a pyramid is obtained by adding the area of all its faces (both the base and the side faces). What is the Total Surface Area of Pyramid? There are two types of surface areas - the Total Surface Area (TSA), which is the sum of the areas of all the faces, and the other is the Lateral Surface Area (LSA), which is the sum of the areas of the side faces. The surface area of a pyramid is defined as the sum of the areas of all its faces. Difference Between Area and Surface AreaįAQs on Surface Area of Pyramid What is the Definition of Surface Area of Pyramid?.Now that we have the slant height, the base length, and the height, we can find the surface area of the pyramid using the formula, Total surface area of pyramid (TSA) = LSA + base area = (1/2) Pl + B So, we can calculate the slant height using the formula, l 2 = h 2 + (a/2) 2. Hence, we can apply the Pythagoras theorem and find out the slant height if the altitude and base length is given. Observe the figure given below which shows that the triangle formed by half the side length of the base (a/2), the slant height (l), and the altitude (h) is a right-angled triangle. The surface area of a pyramid can be calculated if its altitude is given. Using these two formulas, we can derive the surface area formulas of different types of pyramids. The total surface area of pyramid (TSA) = LSA + base area = (1/2) Pl + B We know that the Total Surface Area of a pyramid (TSA) is obtained by adding the base and lateral surface areas. Hence, the Lateral Surface Area of the pyramid (LSA) = (1/2) Pl (Here, we replaced 4a with P which represents its perimeter.) Therefore, the sum of all side faces (sum of all 4 triangular faces) = 4 = (1/2) × (4a) × l = (1/2) Pl. The area of each of the side faces ( area of triangle) = (1/2) × base × height = (1/2) × (a) × l.The base perimeter ( perimeter of square) of the pyramid is, P = 4a.The base area ( area of square) of the pyramid is, B = a 2.Let us consider a square pyramid whose base length is 'a' and whose slant height is 'l'. Let us understand the formulas of LSA and TSA of a pyramid by taking a specific pyramid as an example. The surface area of a pyramid involves the perimeter and slant height.
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