namespace _10_1
{
    internal class Program
    {
        static void Main(string[] args)
        {
            double a, b, c, p, h, area;
            Console.WriteLine("输入三角形的直角边A：");
            a = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("输入三角形的直角边B：");
            b = Convert.ToDouble(Console.ReadLine());
            c = Math.Sqrt(a * a + b * b);
            Console.WriteLine("直角三角形的三边分别为，a={0},b={1},c={2}");
            p = a + b + c;
            h = p / 2;
            area = Math.Sqrt(h * (h - a) * (h - b) * (h - c));
            Console.WriteLine("直角三角形的周长为{0},面积为：{1}", p, area);
            double sinA= a / c;
            double aAngel= Math.Asin(sinA) * 180 / Math.PI;
            double cosB= a / c;
            double bAngel= Math.Acos(cosB) * 180 / Math.PI;
            Console.WriteLine("直角三角形的角A为{0},角B为：{1}", aAngel, bAngel);
        }
    }
}