example

Algorithms/Point.cs

@@ -11,6 +11,10 @@ class Point
         this.y = y;
     }
 
+    public Point(){
+        Point(0, 0);
+    }
+
     public double X()
     {
         return x;
@@ -26,4 +30,11 @@ class Point
         return Math.Sqrt(X() * X() + Y() * Y());
     }
 
+    public Point MidPointOf(Point other)
+    {
+        double midX = (X() + other.X()) / 2;
+        double midY = (Y() + other.Y()) / 2;
+        return new Point(midX, midY);
+    }
+
 }

Algorithms/Program.cs

@@ -10,7 +10,8 @@ class EntryPoint{
     public static void Main(String[] args){
         Point point1 = new Point(3, 4);
         Point point2 = new Point(-3, -4);
+        Point midPoint = point1.MidPointOf(point2);
 
-        Console.WriteLine("Hello World From A Class: " + p.Distance());
+        Console.WriteLine("Hello World From A Class: " + midPoint.X() + ", " + midPoint.Y());
     }
 }

Algorithms/Triangle.cs

@@ -0,0 +1,33 @@
+namespace Algorithms;
+internal class Triangle
+
+{
+
+    private Point sommet1;
+    private Point sommet2;
+    private Point sommet3;
+
+ 
+
+    public Triangle(Point sommet1,Point sommet2,Point sommet3)
+    {
+        this.sommet1 = sommet1;
+        this.sommet2 = sommet2;
+        this.sommet3 = sommet3;
+    }
+
+    public static Triangle Equilateral(double longueur)
+    {
+
+        Point sommet1 = new Point(0,0);
+        Point sommet2 = new Point(0, longueur);
+
+        // H2 = A2 + B2
+        // B = sqrt (H2 - A2)
+
+        double x = Math.Sqrt(longueur*longueur - longueur*longueur/4);
+        Point sommet3 = new Point(x, longueur/2);
+        return new Triangle(sommet1, sommet2, sommet3);
+    }
+
+}