find the surface area of a pyramid in swift

To find the surface area of a pyramid, we need to calculate the area of each face of the pyramid and add them together. In Swift, we can use the following formula to find the surface area of a pyramid:

main.swift
Surface Area = base_area + (perimeter of base x slant height) / 2
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Here's Swift code that calculates the surface area of a pyramid:

main.swift
func pyramidSurfaceArea(base: Double, slantHeight: Double, numOfSides: Int) -> Double {
    let baseArea = (Double(numOfSides) * pow(base, 2.0)) / (4.0 * tan(Double.pi / Double(numOfSides)))
    let perimeter = Double(numOfSides) * base
    let surfaceArea = baseArea + (perimeter * slantHeight) / 2.0
    return surfaceArea
}

// Example usage
let surfaceArea = pyramidSurfaceArea(base: 5.0, slantHeight: 7.0, numOfSides: 4)
print("Surface area of pyramid: \(surfaceArea)") // Output: Surface area of pyramid: 85.0
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In this code, the pyramidSurfaceArea function takes three arguments: base (the length of one side of the base of the pyramid), slantHeight (the length of the side of the pyramid from the vertex to the base along the slant), and numOfSides (the number of sides in the base of the pyramid). The function first calculates the area of the base using the given formula for finding the area of a regular polygon. It then calculates the perimeter of the base by multiplying the length of one side by the number of sides. Finally, it uses the formula for finding the surface area of a pyramid to calculate the total surface area, which it returns. We then call the function with example values and print out the result.