#include <iostream>
using namespace std;
 
//calcolo area quadrato, rettangolo, circonferenza
int latoq;
int base, altezza;
int raggio;
 
int main() {
	// area quadrato
	cout<<"Inserisci il lato del quadrato:"<<endl;
	cin>>latoq;
	cout<<"Area quadrato= "<<latoq*latoq<<endl;
 
    // area rettangolo
	cout<<"Inserisci la base e l'altezza del rettangolo:"<<endl;
	cin>>base>>altezza;
	cout<<"Area rettangolo= "<<base*altezza<<endl;
 
	// area circonferenza
	cout<<"Inserisci il raggio: "<<endl;
	cin>>raggio;
	cout<<"Area circonferenza= "<<3.14*raggio*raggio<<endl;
 
	return 0;
 
 
}

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