But we do have some ideas. It seems that the Egyptians used pi in the construction of the Great Pyramid because when the perimeter is divided by its height, one gets a close approximation to 2π.

The pyramid, which is located about 11 miles from Cairo's center, is the largest of three pyramids in the Giza complex. It was completed around 2560 BCE, according to Encyclopaedia Britannica.

Scientists from the ScanPyramids project use cosmic-ray muon radiography equipment to view a corridor hidden inside the Great Pyramid of Giza, constructed some 4,500 years ago for ancient Egypt's ...

Map of the known corridors and rooms inside the Great Pyramid of Giza. Evidence of a secret corridor was detected in 2016 behind the famed chevron blocks on the north face (h). Another mysterious ...