Using System;
namespace Figuras
{
class Circulo
{
double Area (int r)
{
double a = Math.PI * Math.Pow (r,2);
return a;
}
double Perimetro (int d)
{
double a = Math.PI * d;
return a;
}
Static void Main ( )
{
Console.WriteLine("Da el radio");
int r = int.Parse (Console.ReadLine ());
Circulo c = new Circulo ( );
Console.WriteLine ("area del círculo {0:n} \ n", c. Area (r) );
Console.WriteLine ("perimetro del círculo {0:n} \ n", c. Perimetro (r*2) );
}
}
}
