Added simple algorithm

TMI-practicum/Circle.cs

@@ -0,0 +1,23 @@
+using System;
+
+namespace TMI_practicum
+{
+    public class Circle
+    {
+        public readonly double X;
+        public readonly double Y;
+        public readonly double R;
+
+        public Circle(double x, double y, double r)
+        {
+            X = x;
+            Y = y;
+            R = r;
+        }
+
+        public double Distance(Circle otherCircle)
+        {
+            return Math.Sqrt(Math.Pow(X - otherCircle.X, 2) + Math.Pow(Y - otherCircle.Y, 2));
+        }
+    }
+}