#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    double a,b,c;
    cin>>a>>b>>c;
    double s1,s2,s3,s4,s5;
    s1=a*c/2;
    s2=3.14159*c*c;
    s3=(a+b)*c/2;
    s4=b*b;
    s5=a*b;
    printf("TRIANGULO: %.3lf\n",s1);
    printf("CIRCULO: %.3lf\n",s2);
    printf("TRAPEZIO: %.3lf\n",s3);
    printf("QUADRADO: %.3lf\n",s4);
    printf("RETANGULO: %.3lf\n",s5);
    return 0;
}