using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

//cole is big gey, works in visual studio but not here because CoLe Is BiG rEtArD

namespace ConsoleApp11

{

    public class Shape

    {

        int x;

        int y;

​

        public Shape(int x, int y)

        {

            this.x = x;

            this.y = y;

​

        }

​

        // took me 8 years to figure out all i needed was virtual

        public virtual double Area()

        {

            return 0;

        }

        public virtual double Perimeter()

        {

            return 0;

        }

    }

​

    public class Triangle : Shape

    {

        double Height;

        double Base;

        public Triangle(int x, int y, double Height, double Base) : base(x, y)

        {

            this.Height = Height;

            this.Base = Base;

        }

​

        public override double Area()

        {

            return (Height * Base) / 2;

        }

        public override double Perimeter()

        {

            double x;

             x=Math.Pow(Height , 2)+Math.Pow(Base,2);

            x = Math.Sqrt(x);

            return x + Height + Base;

            // assuming right angle triangle

        }

        public class Rectangle : Shape

        {

            int Width;

            int Length;

            public Rectangle(int x, int y, int Width, int Length) : base(x, y)

            {

                this.Width = Width;

                this.Length = Length;

            }

​

            public override double Area()

            {

                return (Length * Width);

            }

            public override double Perimeter()

            {

                return (Length * 2) + (Width * 2);

            }

                public static void Main()

            {

                Triangle Tri1 = new Triangle(5, 5, 10, 20);

                Console.WriteLine("Area is "+ Tri1.Area());

                Console.WriteLine("Perimeter is "+ Tri1.Perimeter());

            }

        }

    }

}

​