class Triangle (1 of 2)

import java.awt.*;

import java.util.*;

public class Triangle extends Polygon {

Triangle(Point p1, Point p2, Point p3) {

vertices = new Vector();

vertices.addElement(p1);

vertices.addElement(p2);

vertices.addElement(p3);

}

public String describe() {

if (isIsosceles()) return "an isosceles triangle";

else return "a triangle";

}