#include<cstdio>
#include<iostream>
using namespace std;

int main()
{
    double a, b, c;
    cin >> a >> b >> c;
    printf("TRIANGULO: %.3lf\n", a * c / 2);
    printf("CIRCULO: %.3lf\n", 3.14159 * c * c);
    printf("TRAPEZIO: %.3lf\n", (a + b) * c / 2);

    printf("QUADRADO: %.3lf\n", b * b);

    printf("RETANGULO: %.3lf\n", a * b);


    return 0;
}