Fig. 1

Fig. 2

It is surprising that, when reducing Petrie coordinates to True North and accounting for a 3rd Pyramid side of just 200 cubits, the 3 Pyramids appear to be enclosed in a rectangle of sides : 1000*sqrt(3) x 1000*sqrt(2) cubits. The deviations from true values are less than 0.6 cubits or around 30 centimetres on distances of 740 + and 907+ meters.

Fig. 1, where dimensions are referred to a Coord. Syst. that sees Due North at + 4'52", or mean azimuth of 2 larger pyramids, is the plan accurately analyzed by John Legon, who firstly noted the geometry embedded into the Giza Complex.

Fig. 3