public bool SharesEndpointAndBearing(Line other, Double distance, Double bearingSlack)
{
bool result =
SharesEndPointWith(other, distance) &&
(Bearing.AngularDifference(other.Bearing) <= bearingSlack || Bearing.AddDegrees(180).AngularDifference(other.Bearing) <= bearingSlack);
return(result);
}