Codigo del Applet

import java.awt.*; 
import java.applet.*; 
 
public class Tri extends Applet 
  { 
  public void init ()
    {
    setBackground(Color.blue);
    }
    int x1,x2,x3,y1,y2,y3;

  public void paint(Graphics g) 
    {
     x1 = 200; y1 = 25;
     x2 = 20; y2 = 250;
     x3 = 450; y3 = 360;

     g.setColor(Color.red);

     g.drawLine(x1,y1,x2,y2);
     g.drawLine(x2,y2,x3,y3);
     g.drawLine(x3,y3,x1,y1);
     
     g.setColor(Color.white);
     
     g.drawLine((x1+x2)/2,(y1+y2)/2,x3,y3);
     g.drawLine((x1+x3)/2,(y1+y3)/2,x2,y2);
     g.drawLine((x2+x3)/2,(y2+y3)/2,x1,y1);

     Font fuente1 = new Font("Serif", Font.BOLD, 12); 
     g.setFont(fuente1);

     g.setColor(Color.yellow);

     g.drawString("A", x1-2,y1-10);
     g.drawString("B", x2-10,y2+5);
     g.drawString("C", x3+10,y3+10);
     g.drawString("A'", (x2+x3)/2,(y2+y3)/2+15);
     g.drawString("B'", (x1+x3)/2+10,(y1+y3)/2);
     g.drawString("C'", (x1+x2)/2-12,(y1+y2)/2-5);
     g.drawString("G", (x1+x2+x3)/3+10,(y1+y2+y3)/3-15);
     
     Font fuente2 = new Font("Dialog", Font.BOLD, 20); 
     g.setFont(fuente2);
     
     g.setColor(Color.black);
     
     g.drawString("Triangulito y sus medianas", 100,380);
        
    }
   
}