public override void Start()
{
List <Triangle> triangles = _TrianglesRepo.GetTriangles();
TriangleListItems = CreateListViewModelsFromTriangeList(triangles);
SelectedTriangleListItemViewModel = TriangleListItems.FirstOrDefault();
_TrianglesRepo.TriangleAdded += OnTriangleAdded;
}
public double ComputeTotalArea()
{
var triangles = _TrianglesRepo.GetTriangles();
return(triangles.Sum(triangle => 0.5 * triangle.Base * triangle.Height));
}