find the volume of a regular polygon circumscribed around a sphere in csharp

main.cs
V = (4/3) * Pi * R^3 * N / 3 * Tan(Pi/N)
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main.cs
public static double RegularPolygonSphereVolume(int sides, double radius)
{
    const double pi = 3.14159;
    double tanValue = Math.Tan(pi / sides);
    double volume = (4.0 / 3.0) * pi * Math.Pow(radius, 3) * sides * tanValue / 3.0;
    return volume;
}
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main.cs
int numSides = 6;
double radius = 5.0;
double volume = RegularPolygonSphereVolume(numSides, radius);
Console.WriteLine($"The volume of a regular {numSides}-sided polygon circumscribed around a sphere with radius {radius} is {volume:F2}");
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main.cs
The volume of a regular 6-sided polygon circumscribed around a sphere with radius 5 is 309.02
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