Cherechedza ndima iri pasi apa uye wozopindura mubvunzo wacho mumutauro mumwe chete: Passage: Imwe yemipiro inokosha yaParameshvara yaive yepakati kukosha mhando fomula yekudzokorora kupindirana kwe sine.Ndiye aive nyanzvi yemasvomhu yekutanga kupa nharaunda yedenderedzwa ine yakanyorwa quadrilateral. Chirevo ichi dzimwe nguva chinonzi Lhuilier (1782), makore mazana matatu nemakumi mashanu gare gare. Nemativi echikamu chechina chechikamu chiri a, b, c, uye d, nharaunda R yedenderedzwa yakatenderedzwa ndeiyi: Mubvunzo: ndiani akawana nharaunda?
Lhuilier