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C# C# Objects Loops and Final Touches Static Members

Posted by Babatunde Obidare
.a{fill-rule:evenodd;}techdegree
Babatunde Obidare
Full Stack JavaScript Techdegree Student 4,925 Points

Why is it saying "Is your math correct?"

Add a static method named CalculateHypotenuse to the RightTriangle class that returns the length of long side of a right triangle (the hypotenuse), given the length of each of the the two shorter sides (the legs). The Pythagorean theorem will come in handy. The method should take two parameters of type double and return a double.

Bummer! Is your math correct?

namespace Treehouse.CodeChallenges { class RightTriangle { private static double a; private static double b; private static double c;

    public static double CalculateHypotenuse(double sideA, double sideB)
    {
        sideA = a;
        sideB = b;

           return c = System.Math.Sqrt(sideA * sideA) + System.Math.Sqrt(sideB * sideB);      
    }
}

}

RightTriangle.cs 
namespace Treehouse.CodeChallenges
{
    class RightTriangle
    {
        private static double a;
        private static double b;
        private static double c;

        public static double CalculateHypotenuse(double sideA, double sideB)
        {
            sideA = a;
            sideB = b;

               return c = System.Math.Sqrt(sideA * sideA) + System.Math.Sqrt(sideB * sideB);      
        }
    }
}

4 Answers

Seth Kroger
Seth Kroger
56,414 Points
Seth Kroger
Seth Kroger
56,414 Points

The correct formula should be "the square root of the sum..." instead of "sum of the square roots..." You are also reassigning sideA and sideB to different values (most likely zero if there is no other way to initialize/set them).

        public static double CalculateHypotenuse(double sideA, double sideB)
        {
               return System.Math.Sqrt(sideA * sideA + sideB * sideB);      
        }
Babatunde Obidare
.a{fill-rule:evenodd;}techdegree
Babatunde Obidare
Full Stack JavaScript Techdegree Student 4,925 Points

Thanks!

Dale Bailey
Dale Bailey
20,269 Points
Dale Bailey
Dale Bailey
20,269 Points

Another alternative is to use Math.Pow like this

        public static double CalculateHypotenuse(double sideA, double sideB) {
            return System.Math.Sqrt(System.Math.Pow(sideA, 2) + System.Math.Pow(sideB, 2));
        }

although you may want to add 

using System;

to make it look cleaner.

Gavin Schilling
Gavin Schilling
37,904 Points
Gavin Schilling
Gavin Schilling
37,904 Points 
namespace Treehouse.CodeChallenges
{
    class RightTriangle
    {
        public static double CalculateHypotenuse (double _legOfA, double _legOfB) => System.Math.Sqrt (System.Math.Pow (_legOfA, 2) + System.Math.Pow (_legOfB, 2) );      
    }
}
Andrei Li
Andrei Li
34,486 Points
Andrei Li
Andrei Li
34,486 Points

Yet another solution.

using System;
namespace Treehouse.CodeChallenges
{
    class RightTriangle
    {
        public static double CalculateHypotenuse(double first, double second) 
        {
            return Math.Sqrt(Math.Pow(first,2)+Math.Pow(second, 2));
        }
    }
}