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