#include <iostream>
using namespace std;
const double PI = 3.14159;
int main() {
double A, B, C;
scanf("%lf %lf %lf", &A, &B, &C);
printf("TRIANGULO: %.3f\n", (1.0 / 2.0) * A * C);
printf("CIRCULO: %.3f\n", PI * C * C);
printf("TRAPEZIO: %.3f\n", (1.0 / 2.0) * (A + B) * C);
printf("QUADRADO: %.3f\n", B * B);
printf("RETANGULO: %.3f\n", A * B);
return 0;
}