The King's Chamber measures 10x20x10 cubits, as precisely as Egyptians could cut stone, providing us a very precise measure of the builders' cubit. By outstandi

The King's Chamber measures 10x20x10 cubits, as precisely as Egyptians could cut stone, providing us a very precise measure of the builders' cubit. By outstanding coincidence, the chamber is exactly 5pi/3 meters wide. (This also equals 2phi² meters.) The diagonal from corner to opposite corner is 10+sqrt(2) meters, to three places. The ancient Egyptians would have been awed by such coincidences. Us, not so much. I don't know of anyplace where ancient Egyptians demonstrated knowledge of phi, which has the wondrous properties that 1/phi+1=phi=phi²-1. They could of course measure pi as precisely as they liked just by tracing a big circle. Some people make a big deal about the perimeter of its base matching its height times 2pi, and about ratios of these dimensions to the sizes of the Earth, Moon, and Sun. Khafre's is a bit smaller, so its ratios would be off.