public static void Main()
Console.WriteLine("What do you want to do?\n");
Console.WriteLine("\tA:getHypotenuse()\n\tB:isIsosceles()\n\tC:isEquilateral()\n\tD:getAngle()\n\tE:getArea()\n\tF:getPerimeter()\n");
string choice = Console.ReadLine().ToUpper();
Console.WriteLine("Enter length of side a");
a = Double.Parse(Console.ReadLine());
Console.WriteLine("Enter length of side b");
b = Double.Parse(Console.ReadLine());
Console.WriteLine(getHypotenuse(a, b));
Console.WriteLine("Enter length of side a");
a = Double.Parse(Console.ReadLine());
Console.WriteLine("Enter length of side b");
b = Double.Parse(Console.ReadLine());
Console.WriteLine("Enter length of side c");
c = Double.Parse(Console.ReadLine());
Console.WriteLine(isIsosceles(a, b, c));
Console.WriteLine("Enter length of side a");
a = Double.Parse(Console.ReadLine());
Console.WriteLine("Enter length of side b");
b = Double.Parse(Console.ReadLine());
Console.WriteLine("Enter length of side c");
c = Double.Parse(Console.ReadLine());
Console.WriteLine(isEquilateral(a, b, c));
Console.WriteLine("Enter the size of angle 1");
a = Double.Parse(Console.ReadLine());
Console.WriteLine("Enter the size of angle 2");
b = Double.Parse(Console.ReadLine());
Console.WriteLine(getAngle(a, b));
Console.WriteLine("Enter length of base");
tBase = Double.Parse(Console.ReadLine());
Console.WriteLine("Enter length of height");
tHeight = Double.Parse(Console.ReadLine());
Console.WriteLine(getArea(tBase, tHeight));
Console.WriteLine("Enter length of side a");
a = Double.Parse(Console.ReadLine());
Console.WriteLine("Enter length of side b");
b = Double.Parse(Console.ReadLine());
Console.WriteLine("Enter length of side c");
c = Double.Parse(Console.ReadLine());
Console.WriteLine(getPerimeter(a, b, c));
Console.WriteLine("Please try again");
static double getPerimeter(double a, double b, double c)
double perimeter = a + b + c;
static double getArea(double tBase, double tHeight)
double area = 0.5 * tBase * tHeight;
static double getAngle(double ang1, double ang2)
double angle = 180 - ang1 - ang2;
static bool isEquilateral(double a, double b, double c)
static bool isIsosceles(double a, double b, double c)
if(a == b | b == c | a == c)
static double getHypotenuse(double a, double b)
double hypotenuse = Math.Sqrt((a * a) + (b * b));