find the area of a segment of a circle in csharp

To find the area of a segment of a circle in C#, we can use the formula:

main.cs
Area = (theta - sin(theta)) * r^2 / 2
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Where theta is the central angle of the segment in radians, and r is the radius of the circle.

Here's an example implementation:

main.cs
using System;

public class Program
{
    public static void Main()
    {
        double r = 5.0; // radius
        double theta = Math.PI / 3; // central angle in radians
        double area = (theta - Math.Sin(theta)) * r * r / 2; // formula for area of segment

        Console.WriteLine("Area of segment: " + area);
    }
}
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In this example, we have a circle with radius r of 5 units and a central angle theta of 60 degrees (converted to radians). The program calculates the area of the segment using the formula and outputs it to the console.