#include <iostream>
using namespace std;
#include <iostream>
#include <iomanip>
#include <math.h>

int main(int argc, char** argv) {
	double pi = 3.14159;
	double a, b, c;
	double area_triangulo, area_circulo, area_trapezio,
	       area_quadrado,area_retangulo;

	std::cin >> a >> b >> c;

	area_triangulo = a * c / 2;
	area_circulo = pi * pow(c, 2);
	area_trapezio = ((a + b)* c)/2;
	area_quadrado = pow(b, 2);
	area_retangulo = a * b;

	std::cout << std::fixed << std::setprecision(3);
	std::cout << "TRIANGULO: " <<area_triangulo << std::endl;
	std::cout << "CIRCULO: " <<area_circulo << std::endl;
	std::cout << "TRAPEZIO: " <<area_trapezio << std::endl;
	std::cout << "QUADRADO: " <<area_quadrado << std::endl;
	std::cout << "RETANGULO: " <<area_retangulo << std::endl;

	return 0;
}