Barbier's theorem (Q1188048)
From Wikidata
theorem that every curve of constant width has perimeter π times its width
Language  Label  Description  Also known as 

English 
Barbier's theorem

theorem that every curve of constant width has perimeter π times its width

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Wikipedia(9 entries)
 enwiki Barbier's theorem
 eowiki Teoremo de Barbier
 eswiki Teorema de Barbier
 itwiki Teorema di Barbier
 kowiki 바르비에의 정리
 ptwiki Teorema de Barbier
 rowiki Teorema lui Barbier
 ruwiki Теорема Барбье
 ukwiki Теорема Барб'є