public double Area() //площадь
{
double p = this.Perimetr() / 2;
double ar = Math.Sqrt(p * (p - Edge.lengthEdge(c, d)) * (p - Edge.lengthEdge(c, e)) * (p - Edge.lengthEdge(d, e)));
return(ar);
}
public bool Isosceles() //равнобедренные треугольник?
{
double a = Edge.lengthEdge(c, d);
double b = Edge.lengthEdge(c, e);
double f = Edge.lengthEdge(d, e);
if ((a == b) || (b == f) || (f == a))
{
return(true);
}
else
{
return(false);
}
}
public bool Right() // прямоугольный треугольник? (a^2 + b^2 = f^2)
{
double a = Math.Round(Math.Pow(Edge.lengthEdge(c, d), 2));
double b = Math.Round(Math.Pow(Edge.lengthEdge(c, e), 2));
double f = Math.Round(Math.Pow(Edge.lengthEdge(d, e), 2));
if ((a == (b + f)) || (b == (a + f)) || (f == (a + b)))
{
return(true);
}
else
{
return(false);
}
}
public double Perimetr() //периметр
{
double perim = Edge.lengthEdge(c, d) + Edge.lengthEdge(c, e) + Edge.lengthEdge(d, e);
return(perim);
}