using System;
namespace Solution {
  class Solution {
    static void Main(string[] args) {
        double A,B,C;
        double PI=3.14159;
        string cadena =Console.ReadLine();
        string [] ABC = cadena.Split(' ');
        A= Convert.ToDouble(ABC[0]);
        B= Convert.ToDouble(ABC[1]);
        C= Convert.ToDouble(ABC[2]);
        Console.WriteLine("TRIANGULO: " + "{0:f3}",(A*C/2));
        Console.WriteLine("CIRCULO: " + "{0:f3}",(PI*Math.Pow(C,2)));
        Console.WriteLine("TRAPECIO: " + "{0:f3}",C*((A+B)/2));
        Console.WriteLine("CUADRADO: " + "{0:f3}",Math.Pow(B,2));
        Console.WriteLine("RECTANGULO: " + "{0:f3}",(A*B));
    }
  }
}