using System;

// תרגיל 1

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Console.Write("Enter side lenght:");

double side1 = double.Parse(Console.ReadLine());

Console.Write("Enter other side lenght:");

double side2 = double.Parse(Console.ReadLine());

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Console.Write("The surface is " + (side1 * side2)/2);

double yeter = Math.Sqrt(side1 * side1 + side2 * side2);

Console.Write("\nThe perimeter is " + (side1 + side2 + yeter));