irdeggman said:Correct but they do give different examples of where to use your point of origin - which is where you start counting is it not?
No.
There is no measuring in Line of Sight. There is no measuring in flanking, except for measuring the area you threaten, which is defined elsewhere, and would not include squares simply touching the edge of an area. The measuring for area of a cone is explitily defined to not include squares only touching the edge of an area of effect.
If anything, the examples you reference support the fact that the distance from one square to another is 5', and does not include squares that touch the edges.