public class Triangle extends Figure {

  private Point a, b, c;

  public Triangle(Point a, Point b, Point c) throws InvalidFigure {
    if (Point.sameLine(a, b, c)) throw new InvalidFigure();
    this.a = a;
    this.b = b;
    this.c = c;
  }

  public Triangle(Point a, Point b, Point c, Color col) throws InvalidFigure {
    if (Point.sameLine(a, b, c)) throw new InvalidFigure();
    this.a = a;
    this.b = b;
    this.c = c;
    this.col = col;
  }

  private Triangle() {
    a=new Point(0,0);
    b=new Point(1,0);
    c=new Point(0,1);
  }

  public boolean equals(Object t) {
	  throw new UnsupportedOperationException();
  }

  public double ab() {
	  throw new UnsupportedOperationException();
  }

  public double ac() {
	  throw new UnsupportedOperationException();
  }

  public double bc() {
	  throw new UnsupportedOperationException();
  }

  public double area() {
	  throw new UnsupportedOperationException();
  }

  public double perim () {
	  throw new UnsupportedOperationException();
  }
}