Shapes and Solids of Constant Width - Numberphile
Why the open web links it
Explores mathematical shapes and solids of constant width, like the Reuleaux triangle and the 50p coin.
Linked by 6 independent sites, 2 of them widely read in the 2026-10 crawl of the open web, including reed.edu, science20.com, trv-science.ru, happyatheistforum.com, hight3ch.com.