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Total sa a 2 2a a 2 2 h2.
Square surface area math. Sa 2πr 2 2πrh. H is the height. For cones with slant height l and radius r surface area is calculated using this formula. L 2 h 2 r 2.
For example to find the surface area of a cube with sides of 5 inches the equation is. Surface area 2 l w 2 l h 2 w h. H is the height. If a three dimensional figure has flat sides the sides are called faces.
Surface area 2 pi r 2 2 pi r h. The surface area of a square pyramid is comprised of the area of its square base and the area of each of its four triangular faces. The surface area of a figure in square units is the number of unit squares it takes to cover the entire surface of an object without gaps or overlaps. W is the width.
R is the radius. L is the length. These equations will give you correct answers if you keep the units straight. For example a rectangular prism has six faces.
If you do not know the slant height but know height h and radius r you can calculate slant height l using the pythagorean theorem. For cylinders with height h and radius r the formula for surface area is. Base sa a 2. The surface area is the total of the areas of the faces.
Given height h and edge length a the surface area can be calculated using the following equations.
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