L+WXH
= f3 -m4 +3=(4h3)
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The formula to calculate the surface area of a 90-degree elbow is A = πDL, where A is the surface area, D is the diameter of the elbow, and L is the centerline radius. The surface area of the elbow is essentially the curved surface area of the elbow pipe fitting. This formula is derived from the mathematical principles of geometry and calculus, specifically the surface area of a cylinder.
Length x Width x Height = surface area
A quadrilateral does not have a surface area because it is not a voluminous figure.
Surface area of a sphere = 4*pi*radius2
Surface area of a sphere = 4*pi*radius2