🌐EnglishEnglishDeutschFrançaisРусскийالعربيةفارسی한국어中文日本語EntityQ1269124· pop 10· linked from 6 articleskobon triangle problemmathematical problemAvailable in 9 languagesFrançaisDeutsch中文日本語РусскийUkrainianفارسی한국어via Wikidata sitelinks · CC0ConnectionstriangleEntityInternational Standard Book NumberEntityCategoriesDiscrete geometryRecreational mathematicsTrianglesUnsolved problems in geometry