public override double SurfaceArea()
{
double majorAxis = P;
double minorAxis = Math.Sqrt(P * P - Vertex2D.Distance(F1, F2));
return(Math.PI * majorAxis * minorAxis);
}
public Ellipse(Vertex2D f1, Vertex2D f2, double p)
{
F1 = f1;
F2 = f2;
P = p;
}
public static Vertex2D Midpoint(Vertex2D p1, Vertex2D p2)
{
return(new Vertex2D((p1.X + p2.X) / 2, (p1.Y + p2.Y) / 2));
}
public static double Distance(Vertex2D p1, Vertex2D p2)
{
return(Math.Sqrt(Math.Pow(p1.X - p2.X, 2) + Math.Pow(p1.Y - p2.Y, 2)));
}
public Circle(Vertex2D o, double r)
{
O = o;
R = r;
}
public Square(Vertex2D a, Vertex2D b, Vertex2D c) : base(a, b, c)
{
}
public override double SurfaceArea()
{
return(Math.Pow(Vertex2D.Distance(A, B), 2));
}
