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The Great Pyramid of Giza [a] is the largest Egyptian pyramid.It served as the tomb of pharaoh Khufu, who ruled during the Fourth Dynasty of the Old Kingdom.Built c. 2600 BC, [3] over a period of about 26 years, [4] the pyramid is the oldest of the Seven Wonders of the Ancient World, and the only wonder that has remained largely intact.
The base of a pyramid can be of any polygon shape, such as triangular or quadrilateral, and its lines either filled or stepped. A pyramid has the majority of its mass closer to the ground [3] with less mass towards the pyramidion at the apex. This is due to the gradual decrease in the cross-sectional area along the vertical axis with increasing ...
The type of pyramids can be derived in many ways. The base regularity of a pyramid's base may be classified based on the type of polygon: one example is the star pyramid in which its base is the regular star polygon. [24] The truncated pyramid is a pyramid cut off by a plane; if the truncation plane is parallel to the base of a pyramid, it is ...
Passageways and chambers inside the pyramid of Khafre. Two entrances lead to the burial chamber; one is located 11.54 m (37.9 ft) up the northern face of the pyramid, and the other at the base of the pyramid on the same axis. These passageways do not align with the centerline of the pyramid but are offset to the east by 12 m (39 ft).
A great many more have since been discovered. At least 118 Egyptian pyramids have been identified. [3] The location of Pyramid 29 which Lepsius called the "Headless Pyramid", was lost for a second time when the structure was buried by desert sands after Lepsius's survey. It was found again only during an archaeological dig conducted in 2008. [24]
Casing stone from the Great Pyramid. The seked of a pyramid is described by Richard Gillings in his book 'Mathematics in the Time of the Pharaohs' as follows: . The seked of a right pyramid is the inclination of any one of the four triangular faces to the horizontal plane of its base, and is measured as so many horizontal units per one vertical unit rise.
Archaeologists claim this pyramid is 27,000 years is old. But some scientists argue the structure can't be that ancient—and that humans couldn't have built it.
The change of the angle have been made as a stability precaution in reaction to a catastrophic collapse of the Meidum pyramid while it was still under construction. 29°47′25″N 31°12′33″E / 29.79028°N 31.20917°E / 29.79028; 31