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The ratio of the perimeter to height of 1760/280 royal cubits equates to 2π to an accuracy of better than 0.05% (corresponding to the well-known approximation of π as 22/7).
Some Egyptologists consider this to have been the result of deliberate design proportion.
Once they were cut, they were carried by boat either up or down the Nile River to the pyramid.
At completion, the Great Pyramid was surfaced by white "casing stones" – slant-faced, but flat-topped, blocks of highly polished white limestone.
The first precision measurements of the pyramid were made by Egyptologist Sir Flinders Petrie in 1880–82 and published as The Pyramids and Temples of Gizeh. Many of the casing stones and inner chamber blocks of the Great Pyramid fit together with extremely high precision.
Some of the casing stones that once covered the structure can still be seen around the base.There have been varying scientific and alternative theories about the Great Pyramid's construction techniques.Most accepted construction hypotheses are based on the idea that it was built by moving huge stones from a quarry and dragging and lifting them into place.unsurpassed until the 160-metre-tall (520 ft) spire of Lincoln Cathedral was completed c. The accuracy of the pyramid's workmanship is such that the four sides of the base have an average error of only 58 millimetres in length.The completed design dimensions, as suggested by Petrie's survey and subsequent studies, are estimated to have originally been 280 royal cubits high by 440 cubits long at each of the four sides of its base.