using System;

public class Program

{

    public static void Main()

    {

​

        Double A,B,C;

        string[] dados = Console.ReadLine().Split(' ');

        A = Convert.ToDouble(dados[0]);

        B = Convert.ToDouble(dados[1]);

        C = Convert.ToDouble(dados[2]);

        Console.WriteLine("TRIANGULO:  "+((A*C)/2).ToString("0.000"));

        Console.WriteLine("CIRCULO:  "+ (3.14159 * (Math.Pow(C,2))).ToString("0.000"));

        Console.WriteLine("TRAPEZIO:  "+((0.5*C)*(A+B)).ToString("0.000"));

        Console.WriteLine("TRIANGULO:  "+((A*C)/2).ToString("0.000"));

        Console.WriteLine("TRIANGULO:  "+((A*C)/2).ToString("0.000"));

    }

}