include[HTML_REMOVED]

using namespace std;
int main(){
double a,b,c;
cin>>a>>b>>c;
cout<<fixed<<setprecision(3)<<”TRIANGULO: “<<ac/2.000<<endl;
cout<<fixed<<setprecision(3)<<”CIRCULO: “<<cc3.14159<<endl;
cout<<fixed<<setprecision(3)<<”TRAPEZIO: “<<(a+b)c/2.000<<endl;
cout<<fixed<<setprecision(3)<<”QUADRADO: “<<bb<<endl;
cout<<fixed<<setprecision(3)<<”RETANGULO: “<<ab<<endl;
return 0;
}