Sujet : Re: Orange stacks
De : richard (at) *nospam* cogsci.ed.ac.uk (Richard Tobin)
Groupes : rec.puzzlesDate : 15. Jul 2025, 12:28:23
Autres entêtes
Organisation : Language Technology Group, University of Edinburgh
Message-ID : <1055e0n$1eqj6$1@artemis.inf.ed.ac.uk>
References : 1 2 3 4
User-Agent : trn 4.0-test76 (Apr 2, 2001)
In article <
1054sl4$3u0lv$1@dont-email.me>,
David Entwistle <
qnivq.ragjvfgyr@ogvagrearg.pbz> wrote:
I'm still struggling with the idea the structures of the square-based and
triangular-based pyramids are the same.
They are, just at different orientations.
This wikipedia page makes it explicit:
https://en.wikipedia.org/wiki/Close-packing_of_equal_spheresBoth are face-centred cubic (FCC). The diagrams labelled FCC on the
wikipedia page show the two orientations.
-- Richard
Orange stacks
Re: Orange stacks