🌐EnglishEnglishDeutschEspañolFrançaisNederlandsPortuguêsРусский中文日本語EntityQ511431· pop 12· linked from 10 articlesPappus chainchain of tangent circles within an arbelosAvailable in 11 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsNederlandsSlovenianUkrainianConnectionsinversive geometryEntitygeometryEntityCategoriesAncient Greek mathematicsArbelosCircle packingInversive geometry