find the surface area of a regular polygon inscribed in a pyramid in csharp

main.cs
using System;

class Program {
    static void Main(string[] args) {
        double numSides = 6; // Replace with the number of sides in the polygon
        double sideLength = 5; // Replace with the length of each side
        double apothem = sideLength / (2 * Math.Tan(Math.PI / numSides)); // Calculate apothem length
        double height = 10; // Replace with the height of the pyramid
        double slantHeight = Math.Sqrt(apothem * apothem + height * height); // Calculate slant height
        double baseArea = (numSides * sideLength * apothem) / 2; // Calculate area of the base
        double faceArea = (numSides * sideLength * slantHeight) / 2; // Calculate area of each face
        double totalArea = baseArea + (numSides * faceArea); // Calculate total surface area
        Console.WriteLine("Total surface area: {0}", totalArea);
    }
}
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