2) If two non-parallel perpendiculars of a line are parallel to a plane, then the line is perpendicular to that plane
3) If there are two planes A and B both perpendicular to plane C, then the line intersecting the two planes A and B is also perpendicular to plane C
4) If a line is perpendicular to plane B which is parallel to plane A
5) If the projections of any point of the line on the plane coincide, the line is perpendicular to the plane
6) If the distance from any point of the line to the plane is equal to the distance from this point to the intersection of the line, the line is perpendicular to the plane
7) If the distance from any point of the line to the plane is equal to the distance from this point to the intersection of the line, the line is perpendicular to the plane