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- using System;
- class CirclePerimeterAndArea
- {
- static void Main()
- {
- Console.Write("r=");
- double r = double.Parse(Console.ReadLine());
- double p = 2 * (Math.PI) * r;
- double s = Math.PI * (r * r);
- Console.WriteLine("Perimeter is: {0}", Math.Round(p,2));
- Console.WriteLine("Area is: {0}", Math.Round(s,2));
- }
- }
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