from base to peak," Kato stated. "In other words, the Great Pyramid is a concave octagonal pyramid, rather than the standard square pyramid." She further added that the concavity is so subtle ...
The Great Pyramid of Giza, thought to have four sides ... Despite being visible for centuries, the octagonal design wasn’t widely discussed until aerial photography captured its concavity ...
The octagonal pagoda, about fifty meters high, has seven storeys. Each side of its octagonal base is 10.34 meters long. Originally a staircase in the first storey led to upper levels, but it was ...