> However on the link you posted you have Petire's data giving us
> an angle of 212.00 degrees at Giza .This is incorrect as the
> uncorrected measurements gives us 211.92 while the corrected
> measurements gives us 211.897
"The distances separating the centres of the pyramids, as computed by Petrie along axes constructed parallel to the mean azimuth of the Second and Great Pyramids, of -4' 52",  are given in Table II."
the corrected angle is 212.001 degrees.