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From: richard@cogsci.ed.ac.uk (Richard Tobin)
Newsgroups: rec.puzzles
Subject: Re: Orange stacks
Date: Sat, 12 Jul 2025 19:49:24 -0000 (UTC)
Organization: Language Technology Group, University of Edinburgh
Message-ID: <104ue84$1autp$1@artemis.inf.ed.ac.uk>
References: <104tudv$274e7$1@dont-email.me>
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Originator: richard@cogsci.ed.ac.uk (Richard Tobin)

In article <104tudv$274e7$1@dont-email.me>,
David Entwistle  <qnivq.ragjvfgyr@ogvagrearg.pbz> wrote:

>If I had a grocery store, I think I would stack oranges in a square-based 
>pyramid, but I assume that a triangular-based pyramid would lead to more 
>efficient packing.

Contemplate the sloping faces of this square-based pyramid:

https://en.wikipedia.org/wiki/Sphere_packing#/media/File:Rye_Castle,_Rye,_East_Sussex,_England-6April2011_(1)_(cropped).jpg

-- Richard