Coming from the UK, I have seen a lot of variation of the definitions that I am used to. One that I am yet to get my head around is how the points are labelled in a polygon. For example, in a square, I would label, starting from the top left and going clockwise. However, reading further on in the problem, it turns out that I should've started in the top left and then the top right, bottom left and bottom right. Is there a universal point labelling method on brilliant or does it vary by problem?