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Talk:Pythagorean triples: Difference between revisions
→Confirmation of coprime: it's all the same
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So perimeter is really easy. Coprime isn't something that people outside of math talk about much. I had to look it up on [[wp:coprime|Wikipedia]] to figure it out, but I'm still not quite sure. It's defined nicely there for two numbers, but we are dealing with three here. Are a, b, and c coprime if gcd(a, b) = gcd(b, c) = gcd(a, c) = 1? Do I need the third gcd evaluation? --[[User:Mwn3d|Mwn3d]] 15:28, 28 June 2011 (UTC)
: Since a^2 + b^2 == c^2, if any two of them are coprime, the third is also coprime to both, so there's no difference how you interpret "coprime" in this situation. --[[User:Ledrug|Ledrug]] 15:50, 28 June 2011 (UTC)
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