File:Square triangular number 36.svg

DescriptionSquare triangular number 36.svg Square triangular number 36 arranged as a triangle of side 8 and a square of side 6. Source Own work Author

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two areas by 5.  Two relations can be deduced between the golden number and square root of 5, one of them is written on the image. French Ces pavages

americannumismaticsociety; newmannumismatic; wustl; americana; globallibraries Accession number catalogueofcolle00hase_12 Authority file  OCLC: 1041791173 Source Internet

pub_engineering-and-mining-journal; sim_microfilm; periodicals Accession number sim_engineering-and-mining-journal_1908-09-05_86_10 Source Internet Archive