So you're telling me... The Great Pyramid weighs about 6 million tonnes, is made up of 2.3 million blocks that on average weigh about the same as an adult rhino (2.5 tonnes), 8,000 tonnes of the pyramid is made up of red granite from Aswan which is over 800km away from the Giza Plateau, the largest of those Aswan blocks weigh 80 tonnes a piece, about the same as an M1-Abraham Tank, the structure is oriented to true north with an error of only around five-hundredths of a degree, some surviving casing stones and interior masonry exhibit joints averaging approximately 0.5 millimetres, the original base was levelled across an area measuring approximately 230 × 230 metres, each side is almost a quarter of a kilometre in length and originally measured approximately 230.3 metres with an average deviation of approximately 5.8 centimetres, The corners were laid out with a mean angular error of approximately 12 arcseconds, equivalent to just 0.0033 degrees, when you divide the perimeter by twice the height you get 3.142857 and π = 3.141593, so the difference is approximately 0.040%, the golden ratio is φ = 1.6180339 and using the pyramid’s reconstructed dimensions, if you divide the sloping face height by half its base width the result is approximately 1.61859, so approximately 0.034% of the golden ratio. All done in 20-30 years with simple copper tools, ropes, sledges and muscles?