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Words that do Handstands

(hardmath123.github.io)
324 points hardmath123 | 2 comments | 28 Aug 19 14:22 UTC | HN request time: 0s | source
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rom1v ◴[28 Aug 19 16:20 UTC] No.20821221[source]▶
In "Gare du Nord" in Paris: http://www.patricehamel.org/index.php?page=2&article=23

entrée / sortie (entrance / exit)

replies(1): >>20823845 #
kingbirdy ◴[28 Aug 19 20:51 UTC] No.20823845[source]▶
That's not quite the same though - that's legible after reflection, ambigrams are rotations.
replies(1): >>20823886 #
rom1v ◴[28 Aug 19 20:56 UTC] No.20823886[source]▶
That's a rotation in 3D ;-)
replies(1): >>20824908 #
gugagore ◴[28 Aug 19 22:55 UTC] No.20824908[source]▶
No, that's not right. You can't rotate your left hand to look like your right. But they are reflections of each other.
replies(1): >>20825458 #
1. radeklew ◴[29 Aug 19 00:18 UTC] No.20825458[source]▶
But text is already symmetrical along the z axis, so it works.

Say your hands were 2d, so the backs looked the same as the palms. Now hold your hands so that you're looking at the palms and the fingers are pointing up. Rotate your left hand 180° along the y axis, and it would look like your right.

replies(1): >>20830893 #
2. gugagore ◴[29 Aug 19 16:20 UTC] No.20830893[source]▶
I misinterpreted the comment to mean a 2D reflection is a 3D rotation, in general. Thanks for pointing out the comment was about this specific case.