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//
// Worksheet 2/25/09
//
// #3
//
import java.util.*; // for Scanner
import java.text.DecimalFormat;
class App3
{
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
double radius, area, peri;
DecimalFormat f1 = new DecimalFormat("0.0");
System.out.println("Input a radius: ");
radius = sc.nextDouble();
area = Math.PI * radius * radius;
peri = 2 * Math.PI * radius;
System.out.println("Area: " + f1.format(area) );
System.out.println("Peripheral: " + f1.format(peri));
}
}