Fractions for $\sqrt{2}$, $\sqrt{3}$, $\sqrt{5}$, quasi-pythagorean triples and the appearance of the royal cubit, foot and inch in Egypt during the Old Kingdom. Part II

It is hypothesized that in the Old Kingdom, after finding the fraction 47/21 for $\sqrt{5}$, discovered by Shchetnikov when analyzing the proportions of the burial chamber of the Great Pyramid, an inch was introduced as 1/21 of the royal cubit. Examples are given from architecture and religious art in which the inch was used.