public class Parallelogram2
{
  // We keep a Rectangle object with us instead of x,y,w,h
  Rectangle internal_rect;
  double angle;
  
  Parallelogram2(double width, double height, double an){
    internal_rect = new Rectangle(width, height);
    angle = an;
  }
  
  double area(){
    return internal_rect.area()*Math.sin(angle);
  }
  
  void setPosition(double xpos, double ypos){
    internal_rect.setPosition(xpos, ypos);
  }
  
  double getAngle(){
    return angle;
  }
  
  void printDetails(){
    System.out.println("pos = ("+internal_rect.x+", "+internal_rect.y+"), area = "+area());
  }

  public static void main(String args[]){
    Rectangle rect1;
    Parallelogram plg1;
    Parallelogram2 plg2;
    
    rect1 = new Rectangle(20, 10);
    plg1 = new Parallelogram(20, 10, 1);
    plg2 = new Parallelogram2(20, 10, 1);
    
    rect1.printDetails();
    plg1.printDetails();
    plg2.printDetails();
  }
}