🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPortuguêsРусскийالعربية한국어日本語EntityQ2631887· pop 12· linked from 19 articlesSteiner inellipsean ellipse defined from a triangle, tangent to its sides at their midpointsConnectionsincircle and excircles of a triangleEntitySteiner ellipseEntityCategoriesAffine geometryCurves defined for a triangleEllipses