#include <iostream>
using namespace std;
const double PI = 3.14159;//注意是double类型
int main(){
double a,b,c;
cin>>a>>b>>c;
printf("TRIANGULO: %.3lf\n",0.5*a*c);///注意输出格式,不要抄错哦
printf("CIRCULO: %.3lf\n",PI*c*c);
printf("TRAPEZIO: %.3lf\n",(a+b)*c/2);
printf("QUADRADO: %.3lf\n",b*b);
printf("RETANGULO: %.3lf\n",a*b);
return 0;
}