Public
- Public
- Network
- Groups
- Featured
- Popular
- People

An 11-pointed star whose vertices lie on a grid of equilateral triangles, and a copy that has been cut out and folded up. Made and photographed by Gerard Westendorp, and placed by him on Mathstodon, here: https://mathstodon.xyz/@GerardWestendorp/113419078439715042

Download link

An 11-pointed star whose vertices lie on a grid of equilateral triangles, and a copy that has been cut out and folded up. Made and photographed by Gerard Westendorp, and placed by him on Mathstodon, here: https://mathstodon.xyz/@GerardWestendorp/113419078439715042
https://media.mathstodon.xyz/media_attachments/files/113/420/353/590/324/875/original/27156423d58c8baf.jpg

Notices where this attachment appears

Embed this notice
John Carlos Baez (johncarlosbaez@mathstodon.xyz)'s status on Monday, 04-Nov-2024 10:08:02 JST John Carlos Baez
in reply to

Here is what @GerardWestendorp got when he folded up this 11-pointed star: a hexagonal antiprism! The top is a regular hexagon, and so is the bottom, but the bottom is rotated 1/12th of a full turn compared to the top. Around the sides there are 12 equilateral triangles.
If you don't know about antiprisms, you can look at some here:
https://en.wikipedia.org/wiki/Antiprism
(2/3)

In conversation about 19 days ago from mathstodon.xyz permalink