class Kite extends Quadrilaterals {
	private static int numOfKites = 0;
	private double firstSideLength2, secondSideLength2, firstDiagonal2, secondDiagonal2;
	private int serialNumber;

	public Kite() {
		firstSideLength2 = 1.0;
		secondSideLength2 = 1.0;
		firstDiagonal2 = 1.0;
		secondDiagonal2 = 1.0;
		numOfKites++;
		serialNumber = numOfKites;
	}

	public Kite(double firstSideLength2, double secondSideLength2, double firstDiagonal2, double secondDiagonal2) {
		this.firstSideLength2 = firstSideLength2;
		this.secondSideLength2 = secondSideLength2;
		this.firstDiagonal2 = firstDiagonal2;
		this.secondDiagonal2 = secondDiagonal2;
	}

	public Kite(boolean check) {
		if (check == true) {
			numOfKites++;
			serialNumber = numOfKites;
		}
	} //End of Kite method

	public double getFirstSideLength2() {
		return firstSideLength2;
	} //End of getFirstSideLength2 method

	public double getSecondSideLength2() {
		return secondSideLength2;
	} //End of getSecondSideLength2 method

	public double getFirstDiagonal2() {
		return firstDiagonal2;
	} //End of getFirstDiagonal2 method

	public double getSecondDiagonal2() {
		return secondDiagonal2;
	} //End of getSecondDiagonal2 method

	public void setFirstSideLength2(double firstSideLength2) {
		this.firstSideLength2 = firstSideLength2;
	} //End of setfirstSideLength2 method

	public void setSecondSideLength2(double secondSideLength2) {
		this.secondSideLength2 = secondSideLength2;
	} //End of setSecondSideLength2 method

	public void setFirstDiagonal2(double firstDiagonal2) {
		this.firstDiagonal2 = firstDiagonal2;
	} //End of setFirstDiagonal2 method

	public void setSecondDiagonal2(double secondDiagonal2) {
		this.secondDiagonal2 = secondDiagonal2;
	} //End of setSecondDiagonal2 method

	public int getSerialNumber() {
		return serialNumber;
	}

	public double findPerimeter() {
		return 2*firstSideLength2 + 2*secondSideLength2;
	} //End of findPerimeter method

	public double findArea() {
		return (firstDiagonal2 * secondDiagonal2)/2;
	} //End of findArea method

	public static int getNumOfKites() {
		return numOfKites;
	} //End of getNumOfKites method

	public String toString()
	{
		return ("[Kite " + serialNumber + "]\nFirst Side Length: " + getFirstSideLength2() + "\nSecond Side Length: " + getSecondSideLength2() + "\nFirst Diagonal: " + getFirstDiagonal2() + "\nSecond Diagonal: " + getSecondDiagonal2() + "\nThe area is " + findArea() + "\nThe perimeter is " + findPerimeter() + "\n");
	} //End of toString method

	public boolean equals(Object o) {
		if (o instanceof Kite)
		{
			Kite k = (Kite)o;
			if (this.getSerialNumber() == k.getSerialNumber())
				return true;
		}
		return false;
	} //End of equals method
} //End of class Kite