Found a reasonable copy of Alberti vs Pacioli letter B comparision, which this work is based upon. http://www.smedresmania.com/wp-content/uploads/2007/08/alberti-vs-pacioli.jpg Tried to figure out Pacioli's proportion in that construction he used, with no avail.
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letter B by Leon Battista Alberti at Rucellai sepulchre, 1446-1451 free icon was designed by Lazur URH for icons Png and presented to its users.
Lazur URH
2/8/2018