Those same sources will also tell you that Egyptians did not have angular measure. They had the "sekhed", a gradient for measuring slope. How then were they ab

Those same sources will also tell you that Egyptians did not have angular measure. They had the "sekhed", a gradient for measuring slope. How then were they able to derive pi and phi, which the GP is inextricably related to? (https://www.goldennumber.net/phi-pi-great-pyramid-egypt/ https://www.goldennumber.net/phi-pi-great-pyramid-egypt/) I have some theories on this, but they are more speculative and less substantiated than what's been discussed so far.