Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Dutch architect & Benedictine monk Dom Hans van der Laan ya ba da sunan lambar filastik (Dutch) zuwa wannan lambar a 1928. A shekara ta 1924, shekaru hudu kafin van der Laan ya yi baftisma da sunan lambar, injiniyan Faransa Gérard Cordonnier ya riga ya gano lambar kuma ya kira shi lambar radiant (Faransanci: le nombre radiant). Ba kamar sunayen rabo na zinariya da rabo na azurfa ba, kalmar filastik ba ta nufin van der Laan don komawa zuwa wani abu na musamman ba, amma a cikin ma'anar adjective, ma'ana wani abu da za a iya ba da siffar uku. Wannan, a cewar Richard Padovan, saboda halayen halayen lambar, 3/4 da 1/7, suna da alaƙa da iyakokin fahimtar ɗan adam wajen danganta girman jiki ɗaya zuwa wani. Van der Laan ya tsara cocin St. Benedictusberg Abbey na 1967 zuwa waɗannan nau'ikan lambobin filastik.Ana kiran lambar filastik a wasu lokuta lambar azurfa, sunan da Midhat J. Gazalé ya ba shi kuma daga baya Martin Gardner ya yi amfani da shi, amma ana amfani da wannan sunan ne don yawan azurfa 1 + √2, ɗaya daga cikin rabo daga dangin ma'anar ƙarfe wanda Vera W. de Spinadel ya fara bayyanawa a 1998.  Tambaya: Wanene ya ba da sunan filastik
Dokta Hans van der Laan