public class Master extends Triangle{
    Master(){}
public void master(Triangle t1 , Triangle t2) {
        for(int i = 0 ; i < 3 ; i++) {
           if(t1.xPoly[i] == t2.xPoly[i] && t1.yPoly[i] == t2.yPoly[i]) {
               int n = ++i;
               System.out.println("точка "+ n +  " є спільною для 2 трикутників");
           }

    }

    }}


















import java.awt.*;
import java.lang.*;
public class Triangle {

    protected int xPoly[] = new int [3];
    protected int yPoly[] = new int [3];
    public int length = 3;
    public Triangle() {

            xPoly[0] = 70;
            yPoly[0] = 100;
            xPoly[1] = 150;
            yPoly[1] = 200;
            xPoly[2] = 200;
            yPoly[2] = 100;
         }

   public Triangle(int xPoly[], int yPoly[]){
       this.xPoly = xPoly;
       this.yPoly = yPoly;
   }

   public void getRadius() {
       double   a = Math.sqrt(Math.pow(xPoly[1] - xPoly[0],2) + Math.pow(yPoly[1] - yPoly[0], 2));

           double  b = Math.sqrt(Math.pow(xPoly[2] - xPoly[1],2) + Math.pow(yPoly[2] - yPoly[1], 2));

           double c = Math.sqrt(Math.pow(xPoly[0] - xPoly[2],2) + Math.pow(yPoly[0] - yPoly[2], 2));

           double p = (a + b + c) / 2;

       double S = Math.sqrt(p* (p-a) * (p-b) * (p - c));

       double R = (a* b* c) / (4 *S);

       System.out.println(R);
   }


   public void Visible () {
     Boolean per = true ;

       for(int i = 0 ; i < 3 ; i++) {
           if(xPoly[i] < 0 || xPoly[i] > 250 || yPoly[i] < 0 || yPoly[i] > 250  )
               per = false;
       }
       if(per == true)
       { System.out.println("All points is inside the frame");}
       else
       {  System.out.println("At least one point is outside the frame");}
   }
    public void drawTriangle(Graphics g) {
        g.drawPolygon(new Polygon(xPoly, yPoly, xPoly.length));
    }


}







import java.awt.*;
import java.awt.event.*;

public class DvaClass extends Frame{


    private int Nabi[] = { 70, 100 , 140};
    private int Genuk[] = { 100, 130 , 130};
     Triangle ob1 = new Triangle();
     Triangle ob2 = new Triangle(Nabi , Genuk);
     Master m1 = new Master();

  Stroke drawingStroke = new BasicStroke(2);
  public  void paint(Graphics g) {
        Graphics2D graph = (Graphics2D)g;

        ob1.drawTriangle(graph);
        ob2.drawTriangle(graph);
        ob1.getRadius();
        ob2.getRadius();
        ob1.Visible();
        ob2.Visible();
        m1.master(ob1, ob2);
        }


  public static void main(String args[]) {

  Frame frame = new DvaClass();


  frame.addWindowListener(
          new WindowAdapter(){
              public void windowClosing(WindowEvent we){
              System.exit(0);
             }
            }
          );
  frame.setSize(250, 250);
  frame.setVisible(true);
 }}