import java.sql.SQLOutput;
import java.util.Scanner;

interface Figura {
    double obliczObwod();
    double obliczPowierzchnie();
}

class Kwadrat implements Figura {
    private final double a;

    Kwadrat(double a) {
        this.a = a;
    }

    @Override
    public double obliczObwod() {
        return 4 * a;
    }

    @Override
    public double obliczPowierzchnie() {
        return a * a;
    }
}

class Trojkat implements Figura {
    private final double a;
    private final double b;
    private final double c;

    Trojkat(double a, double b, double c) {
        this.a = a;
        this.b = b;
        this.c = c;
    }

    @Override
    public double obliczObwod() {
        return a + b + c;
    }

    @Override
    public double obliczPowierzchnie() {
        double p = (a + b+ + c) / 2;
        return Math.sqrt(p * (p - a) * (p - b) * (p - c));
    }
}

class Trapez implements Figura {
    private final double a;
    private final double b;
    private final double c;
    private final double d;
    private final double h;

    Trapez(double a, double b, double c, double d, double h) {
        this.a = a;
        this.b = b;
        this.c = c;
        this.d = d;
        this.h = h;
    }

    @Override
    public double obliczObwod() {
        return a + b + c + d;
    }

    @Override
    public double obliczPowierzchnie() {
        return (a + b) * h / 2;
    }
}

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Kwadrat:");
        System.out.print("  Dlugosc boku a: ");
        double kwadratA = scanner.nextDouble();

        System.out.println("Trojkat:");
        System.out.print("  Dlugosc boku a: ");
        double trojkatA = scanner.nextDouble();
        System.out.print("  Dlugosc boku b: ");
        double trojkatB = scanner.nextDouble();
        System.out.print("  Dlugosc boku c: ");
        double trojkatC = scanner.nextDouble();

        System.out.println("Trapez:");
        System.out.print("  Dlugosc boku a: ");
        double trapezA = scanner.nextDouble();
        System.out.print("  Dlugosc boku b: ");
        double trapezB = scanner.nextDouble();
        System.out.print("  Dlugosc boku c: ");
        double trapezC  = scanner.nextDouble();
        System.out.print("  Dlugosc boku d: ");
        double trapezD  = scanner.nextDouble();
        System.out.print("  Dlugosc wysokosci: ");
        double trapezH  = scanner.nextDouble();

        Kwadrat kwadrat = new Kwadrat(kwadratA);
        Trojkat trojkat = new Trojkat(trojkatA, trojkatB, trojkatC);
        Trapez trapez = new Trapez(trapezA, trapezB, trapezC, trapezD, trapezH);

        System.out.println("Wyniki:");
        wypiszWynik(kwadrat, "Kwadrat");
        wypiszWynik(trojkat, "Trojkat");
        wypiszWynik(trapez, "Trapez");
    }

    private static void wypiszWynik(Figura figura, String nazwaFigury) {
        System.out.println(nazwaFigury + ":");
        System.out.println("  Obwod: " + figura.obliczObwod());
        System.out.println("  Powierzchnia: " + figura.obliczPowierzchnie());
    }
}