public class Trojkat extends Figura
{
	private double bok_a = 0;
	private double bok_b = 0;
	private double bok_c = 0;

	Trojkat(String kolor, double bok_a, double bok_b, double bok_c)
	{
		this.kolor = kolor;
		this.bok_a = bok_a;
		this.bok_b = bok_b;
		this.bok_c = bok_c;
	}

	public String getKsztalt()
	{
		return Trojkat.class.getName();
	}

	public double getPowierzchnia()
	{
		// wzor herona
		double p = this.getObwod() / 2;
		return Math.sqrt(p * (p - this.bok_a) * (p - this.bok_b) * (p - this.bok_c));
	}

	public double getObwod()
	{
		return this.bok_a + this.bok_b + this.bok_c;
	}
}