Adding assignments

Figures/Circle.cs

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+namespace OOP.Figures
+{
+    public class Circle : Shape
+    {
+        public Circle(double radius)
+        {
+            this.radius = radius;
+        }
+
+        public double radius { get; set; }
+
+        public override double GetArea()
+        {
+            return Math.PI * Math.Pow(radius, 2);
+        }
+
+        public override double GetPerimeter()
+        {
+            return 2 * Math.PI * radius;
+        }
+    }
+}

Figures/Rectangle.cs

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+namespace OOP.Figures
+{
+    public class Rectangle : Shape
+    {
+        public Rectangle(double width, double height)
+        {
+            this.height = height;
+            this.width = width;
+        }
+
+        public double height { get; set; }
+        public double width { get; set; }
+
+        public override double GetArea()
+        {
+            return height * width;
+        }
+
+        public override double GetPerimeter()
+        {
+            return (height * 2) + (width * 2);
+        }
+    }
+}

Figures/Shape.cs

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+namespace OOP.Figures
+{
+    public abstract class Shape
+    {
+        public abstract double GetArea();
+        public abstract double GetPerimeter();
+    }
+}