/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// 
 
		double l = 21.5;
		double p = l*4;
		double a = l*l;
		double d = l*1.4142;
 
		System.out.println("Il perimetro equivale a "+ p+ "cm");
		System.out.println("L'area equivale a "+ a + "cm quadrati");
		System.out.println("La diagonale equivale a "+ d+ "cm");
	}
}
 
 

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