I am pretty sure that the math does not work out
Simple geometry would suggest that the middle position should not be there. In fact, the more mathematically oriented will point out that the middle point of a square with six feet sides is only 1/sqrt(2) of six feet or about 70% of the required distance…
I am not sure why they put this there. This is in the elevator to the United Club in Newark airport. I was going to ask the lady at the counter but between my mask, her mask, two layers of plexiglass and six feet of separation, I thought the better of it!!
The math nerd in me still protests!