🌐EnglishEnglishDeutschEspañolFrançaisItalianoPortuguês中文日本語EntityQ6964957· pop 9· linked from 8 articlesnapkin ring problemproblem in geometryAvailable in 8 languagesEspañolFrançais日本語PortuguêsItalianoGreekHebrewvia Wikidata sitelinks · CC0ConnectionsJapaneseEntitygeometryEntityCategoriesJapanese mathematicsMathematical problemsRecreational mathematicsVolume