[goto11]

This is even explained in the article. It is the "infographic" which entirely misrepresent his point.

The title of the article is also rather misleading. It makes is sound like he thinks there is exactly 8 possible shapes, while he is just showing some examples.

[dang]

Ah good point - we've de-eighted the title now. This is an obvious (except I missed it) application of the site guideline:

If the title contains a gratuitous number or number + adjective, we'd appreciate it if you'd crop it. E.g. translate "10 Ways To Do X" to "How To Do X," and "14 Amazing Ys" to "Ys." Exception: when the number is meaningful, e.g. "The 5 Platonic Solids."

https://news.ycombinator.com/newsguidelines.html