/// <summary>
/// Defines the entry point of the application.
/// </summary>
static void Main()
{
double lenght = double.Parse(Console.ReadLine());
double altitude = double.Parse(Console.ReadLine());
Console.WriteLine("{0:F2}", TriangleSurface.SurfaceCalculate(lenght, altitude));
}
static void Main()
{
Console.WriteLine("Find triangular surface by:");
Console.WriteLine("1.Side and altitude to it.");
Console.WriteLine("2.Three sides.");
Console.WriteLine("3.Two sides and angel between.");
string input = Console.ReadLine();
if (input == "1")
{
double side;
double altitude;
Console.Write("Enter side: ");
side = double.Parse(Console.ReadLine());
Console.Write("Enter altitude: ");
altitude = double.Parse(Console.ReadLine());
Console.WriteLine(TriangleSurface.AreaBySideAndAltitude(side, altitude));
}
else if (input == "2")
{
double side1;
double side2;
double side3;
Console.Write("Enter side1: ");
side1 = double.Parse(Console.ReadLine());
Console.Write("Enter side2: ");
side2 = double.Parse(Console.ReadLine());
Console.Write("Enter side3: ");
side3 = double.Parse(Console.ReadLine());
Console.WriteLine(TriangleSurface.AreaByThreeSides(side1, side2, side3));
}
else if (input == "3")
{
double side1;
double side2;
double angle;
Console.Write("Enter side1: ");
side1 = double.Parse(Console.ReadLine());
Console.Write("Enter side2: ");
side2 = double.Parse(Console.ReadLine());
Console.Write("Enter angle: ");
angle = double.Parse(Console.ReadLine());
Console.WriteLine(TriangleSurface.AreaBySidesAndAngel(side1, side2, angle));
}
else
{
Console.WriteLine("Invalid input.");
}
}