Round #999

A right-angled triangle has legs of length 5 and 12. Find the length of the hypotenuse.

```csharp using System; class Program { static void Main() { // Given lengths of the legs double a = 5; double b = 12; // Calculate the length of the hypotenuse using the Pythagorean theorem double c = Math.Sqrt(a * a + b * b); Console.WriteLine("The length of the hypotenuse is: " + c); } } ```

```csharp using System; public class RightTriangle { public static double CalculateHypotenuse(double a, double b) { if (a < 0 || b < 0) { throw new ArgumentException("Leg lengths cannot be negative."); } return Math.Sqrt(a * a + b * b); } public static void Main(string[] args) { double a = 5; double b = 12; double c = CalculateHypotenuse(a, b); Console.WriteLine($"The length of the hypotenuse is {c}."); } } ``` This C# code calculates the length of the hypotenuse of a right-angled triangle using the Pythagorean theorem, which states that a² + b² = c², where a and b are the lengths of the legs and c is the length of the hypotenuse. The `CalculateHypotenuse` method takes the lengths of the legs as input and returns the length of the hypotenuse. The `Main` method demonstrates how to use this method with the given leg lengths of 5 and 12. The length of the hypotenuse is then printed to the console.