using System;
namespace MyCompiler {
class Program {
public static void Main(string[] args) {
Console.WriteLine("digite o raio do circulo: ");
double raio = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("area do circulo: " + (Math.PI * raio * raio));
Console.WriteLine("perimetro do circulo: " + (Math.PI * 2 * raio));
}
}
}
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