using System.Collections.Generic;
static void Main(string[] args)
Random rnd = new Random();
int w= Polygon.GetClientWidth();
int h= Polygon.GetClientHeight();
Polygon yaxis=new Polygon (new Point (0,-h/2), new Poiny (0,h/2));
Polygon xaxis=new Polygon (new Point (-w/2,0), new Poiny (w/2,0));
Point A = new Point (rnd.Next(w/2), rnd.Next(h/2));
Point B = new Point (rnd.Next(w/2), rnd.Next(h/2));
Point C = new Point (rnd.Next(w/2), rnd.Next(h/2));
Polygon triangle= new Polygon (A,B,C);