Quote:
Originally Posted by blackbird
where you can also find a rotating grid with two centers:
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Cute. He says it is based upon the number 65, which figures in 8 pythagorean triples as the hypotenuse. Actually, it figures in 4, but I can see what he means. However, I think he also uses 65
2 = 0
2 + 65
2, or vice versa
