Home›Types of quadrilaterals›harmonic quadrilateral🌐EnglishEnglishEspañolالعربية日本語EntityQ12094381· pop 7· linked from 81 articlesharmonic quadrilateralAlso known as harmonic quadranglecyclic quadrangle in which the products of the lengths of opposite sides are equalAvailable in 7 languagesEspañol日本語العربيةGreekRomanianUkrainianvia Wikidata sitelinks · CC0ConnectionsquadrilateralEntityparallelogramEntityCategoriesTypes of quadrilaterals