The fact you would have seen elsewhere is not a strong argument. I have seen many wrong things somewhere in my life, and I probably wrote some of them too :=) Why don't you say "square" (after correcting "ring") as HG does on this same page? It wouldn't be perfect, but it is less incorrect. Well, after all, I was just saying. With perimeter, people may understand that S=ADN and T=HGZC because they are the perimeters in a common view.
The fact you would have seen elsewhere is not a strong argument. I have seen many wrong things somewhere in my life, and I probably wrote some of them too :=) Why don't you say "square" (after correcting "ring") as HG does on this same page? It wouldn't be perfect, but it is less incorrect. Well, after all, I was just saying. With perimeter, people may understand that S=ADN and T=HGZC because they are the perimeters in a common view.