#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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