//Создаем треугольник по координатам трех точек
public Triangle(Point pointA, Point pointB, Point pointC)
{
if (pointA is null || pointB is null || pointC is null)
{
throw new ArgumentNullException();
}
double aB = GeomUtils.CalcDistance(pointA, pointB);
double bC = GeomUtils.CalcDistance(pointB, pointC);
double aC = GeomUtils.CalcDistance(pointA, pointC);
if (aB >= bC + aC || bC >= aB + aC || aC >= bC + aB) //проверяем, может ли такой треугольник существовать
{
throw new ArgumentException("This triangle cant exist");
}
PointA = pointA;
PointB = pointB;
PointC = pointC;
}
public override double CalcPerimeter()
{
return(GeomUtils.CalcDistance(PointA, PointB) + GeomUtils.CalcDistance(PointB, PointC) + GeomUtils.CalcDistance(PointA, PointC));
}