#include <iostream>
#include <cstdio>
#define pi 3.14159
using namespace std;
int main(){
    double a, b, c;
    scanf("%lf%lf%lf", &a, &b, &c);
    printf("TRIANGULO: %.3lf\n", 0.5*a*c);
    printf("CIRCULO: %.3lf\n", pi*c*c);
    printf("TRAPEZIO: %.3lf\n", 0.5*(a+b)*c);
    printf("QUADRADO: %.3lf\n", b*b);
    printf("RETANGULO: %.3lf\n", a*b);
    return 0;
}