
:''This article is about the polyhedron. For specific massive constructions in the shape of that polyhedron, see: Egyptian pyramids, Mesoamerican pyramids, Nubian pyramids.'' A pyramid is a geometric shape formed by connecting a polygonal base and a point, called the apex, by triangular faces. When unspecified the base is usually assumed to be square. One of the Platonic solids, the tetrahedron, is a triangular pyramid. The square and pentagonal pyramids can also be constructed with all faces regular, and so count among the Johnson solids. All pyramids are self-dual polyhedron. The volume of a pyramid is where ''A'' is the area of the base and ''h'' the height from the base to the apex. The geometric centre of a square-sided regular pyramid is located on the symmetry axis, one quarter of the way from the base to the apex. ==Structures == [[Image:Pyramids of Egypt1.jpg|thumb|300px|right|The pyramids of Giza. The largest pyramids, from left to right, are Menkaure's pyramid, Khafre's pyramid, and the Great Pyramid.]] Pyramid-shaped structures were built by many ancient peoples. The most famous are the Egyptian pyramids — huge pyramids built of brick or stone, used as tombs for pharaohs. The Great Pyramid of Giza is one of the Seven Wonders of the World, and the only one of the seven to survive into modern times. The ancient Egyptians smoothed the faces of their pyramids with gold and polished white limestone, though many of the stones used for the purpose have fallen out over the centuries. To the south of Egypt the Nubians also built pyramids. They built far more than the Egyptians, but they are much smaller. The Nubian pyramids were constructed at a much steeper angle than Egyptian ones and were not tombs, but monuments to dead kings. Pyramids were built in Nubia up until the AD 300s. The Mesopotamians also built pyramids called ziggurats, with a distinct series of layers. In ancient times these were brightly painted. Since they were constructed of mud-brick, little remains of them. The biblical Tower of Babel is believed to be a Babylonian ziggurat. A number of Mesoamerican cultures also built pyramid-shaped structures. Mesoamerican pyramids were also usually stepped, with temples on top, more similar to the Mesopotamian ziggurat than the Egyptian pyramid. The largest pyramid by volume is the Great Pyramid of Cholula, in the Mexico state of Puebla. There are other pyramid-shaped ancient monuments found in parts of Asia. Pyramids were also found in Greece. One of these pyramids in Greece is older than the pyramid of Cheops, as it was dated to 2720 BC. There is a pyramid in ancient Rome. The 27-meter-high pyramid of Gaius Cestius was built by the end of the first century BC and still exists today, close to the Porta San Paolo. ===Modern pyramids=== {| align=right |[[Image:pyramid.750pix.jpg|thumb|right|250px|A modern pyramid, built as a feature and as an entrance to the Louvre Art Gallery]] |- | |} An example of a modern pyramid can be found in Paris, France, in front of the Louvre Museum. The gym for the basketball and volleyball teams on the California State University, Long Beach, campus in California, United States, is an 18-story-tall blue pyramid. The Luxor Hotel in Las Vegas, United States, is a 30-story pyramid. ==Esoterism== Esoterism have attributed remarkable properties ("pyramid power") to the pyramid shape and remarkable histories to historical pyramids; even paper pyramids are reputedly able to keep blades sharp and to prevent meat from decaying. Researchers adhering to strict scientific standards have not substantiated these claims. ==Related== ===Hierarchical structure=== The hierarchical structures of some organizations are sometimes described as pyramids. This often includes sports league systems. ===Game show=== ''Pyramid (game show)'' is the name of a game show currently in syndication. ===Novel=== ''Pyramids (Discworld)'' is a Discworld novel by Terry Pratchett. ===Album=== Pyramid (album) is a concept album by The Alan Parsons Project, released in 1978. ===Magazine=== ''Pyramid (magazine)'' is an online magazine publishing role-playing game and other game articles, published by Steve Jackson Games. ===Confidence game=== A pyramid scheme is a phony business, similar to a chain letter, that involves the exchange of money primarily for enrolling other people into the scheme. ==External links== *[http://www.mathconsult.ch/showroom/unipoly/ The Uniform Polyhedra] *[http://www.georgehart.com/virtual-polyhedra/vp.html Virtual Reality Polyhedra] The Encyclopedia of Polyhedra Pyramids Self-dual polyhedra ms:Piramid simple:Pyramid
== Picture of the Pyramide in front of Le Louvres in Paris == We can't use pictures from this pyramid since its architect holds a copyright on it. == Esoterism == I don't know, but it seems sort of strange to talk about the "esoteric properties" of pyramids as if they were fact. AFAIK, scientific research hasn't proven this stuff, and my BS detector spikes on the mention of blades being dulled by moonlight. User:Zetawoof 22:35, 25 Oct 2004 (UTC) : It was all added by a ''single'' author (an anon): [http://en.wikipedia.org/w/wiki.phtml?title=Pyramid&diff=5956754&oldid=5956659]. Maybe that's why the one-person style looks a bit idiosyncratic. --User:Menchi 23:33, 25 Oct 2004 (UTC)
See other meanings of words starting from letter:
Words begining with Pyramid:
Pyramid
Pyramid
Pyramidal
Pyramidal
Pyramidal
Pyramidal_cell
Pyramidal_cell
Pyramidal_cells
Pyramidal_cells
Pyramidal_motor_system
Pyramidal_neuron
Pyramidal_number
Pyramidal_orchid
Pyramidal_tract
Pyramidal_Tracts
Pyramidal_Tracts
Pyramidas
Pyramide
Pyramide
Pyramiden
Pyramidenkogel_Tower
Pyramiden_(short_stories)
Pyramiden_(short_stories)
Pyramides_(Paris_Metro)
Pyramids
Pyramids
Pyramids_(Discworld)
Pyramids_(Egyptian)
Pyramids_of_Egypt
Pyramids_of_Giza
Pyramids_of_Gizeh
Pyramids_of_Guimar
Pyramids_of_Güímar
Pyramids_of_Güímar
Pyramids_of_Mars
Pyramids_of_Nubia
Pyramid_(album)
Pyramid_(game_show)
Pyramid_(magazine)
Pyramid_(solitaire)
Pyramid_Arena
Pyramid_Arena_(Memphis,_TN)
Pyramid_at_Meidun
Pyramid_Breweries,_Inc.
Pyramid_Breweries,_Inc.
Pyramid_Club
Pyramid_Dam
Pyramid_inch
Pyramid_Lake
Pyramid_Lake_(California)
Pyramid_Lake_(disambiguation)
Pyramid_Lake_Indian_Reservation
Pyramid_magazine
Pyramid_Mountain
Pyramid_Mountain_(Alberta)
Pyramid_Mountain_(Alberta)
Pyramid_of_Cestius
Pyramid_of_Cestius
Pyramid_of_Cheops
Pyramid_of_Cholula
Pyramid_of_Djoser
Pyramid_of_Djoser
Pyramid_of_Djozer
Pyramid_of_Djzoser
Pyramid_of_Djzosèr
Pyramid_of_Khafra
Pyramid_of_Khafre
Pyramid_of_Khufu
Pyramid_of_Menkaura
Pyramid_of_Menkaure
Pyramid_of_the_Moon
Pyramid_of_the_Sun
Pyramid_of_value
Pyramid_Party_of_India
Pyramid_Peak
Pyramid_Peak_(Colorado)
Pyramid_Poker
Pyramid_poker
Pyramid_power
Pyramid_power
Pyramid_Rock_Festival
Pyramid_scheme
Pyramid_scheme
Pyramid_schemes
Pyramid_selling_scheme
Pyramid_Technology
Pyramid_Texts
Pyramid_Texts
Pyramid_texts
Pyramid
:''This article is about the polyhedron. For specific massive constructions in the shape of that polyhedron, see: Egyptian pyramids, Mesoamerican pyramids, Nubian pyramids.'' A pyramid is a geometric shape formed by connecting a polygonal base and a point, called the apex, by triangular faces. When unspecified the base is usually assumed to be square. One of the Platonic solids, the tetrahedron, is a triangular pyramid. The square and pentagonal pyramids can also be constructed with all faces regular, and so count among the Johnson solids. All pyramids are self-dual polyhedron. The volume of a pyramid is where ''A'' is the area of the base and ''h'' the height from the base to the apex. The geometric centre of a square-sided regular pyramid is located on the symmetry axis, one quarter of the way from the base to the apex. ==Structures == [[Image:Pyramids of Egypt1.jpg|thumb|300px|right|The pyramids of Giza. The largest pyramids, from left to right, are Menkaure's pyramid, Khafre's pyramid, and the Great Pyramid.]] Pyramid-shaped structures were built by many ancient peoples. The most famous are the Egyptian pyramids — huge pyramids built of brick or stone, used as tombs for pharaohs. The Great Pyramid of Giza is one of the Seven Wonders of the World, and the only one of the seven to survive into modern times. The ancient Egyptians smoothed the faces of their pyramids with gold and polished white limestone, though many of the stones used for the purpose have fallen out over the centuries. To the south of Egypt the Nubians also built pyramids. They built far more than the Egyptians, but they are much smaller. The Nubian pyramids were constructed at a much steeper angle than Egyptian ones and were not tombs, but monuments to dead kings. Pyramids were built in Nubia up until the AD 300s. The Mesopotamians also built pyramids called ziggurats, with a distinct series of layers. In ancient times these were brightly painted. Since they were constructed of mud-brick, little remains of them. The biblical Tower of Babel is believed to be a Babylonian ziggurat. A number of Mesoamerican cultures also built pyramid-shaped structures. Mesoamerican pyramids were also usually stepped, with temples on top, more similar to the Mesopotamian ziggurat than the Egyptian pyramid. The largest pyramid by volume is the Great Pyramid of Cholula, in the Mexico state of Puebla. There are other pyramid-shaped ancient monuments found in parts of Asia. Pyramids were also found in Greece. One of these pyramids in Greece is older than the pyramid of Cheops, as it was dated to 2720 BC. There is a pyramid in ancient Rome. The 27-meter-high pyramid of Gaius Cestius was built by the end of the first century BC and still exists today, close to the Porta San Paolo. ===Modern pyramids=== {| align=right |[[Image:pyramid.750pix.jpg|thumb|right|250px|A modern pyramid, built as a feature and as an entrance to the Louvre Art Gallery]] |- | |} An example of a modern pyramid can be found in Paris, France, in front of the Louvre Museum. The gym for the basketball and volleyball teams on the California State University, Long Beach, campus in California, United States, is an 18-story-tall blue pyramid. The Luxor Hotel in Las Vegas, United States, is a 30-story pyramid. ==Esoterism== Esoterism have attributed remarkable properties ("pyramid power") to the pyramid shape and remarkable histories to historical pyramids; even paper pyramids are reputedly able to keep blades sharp and to prevent meat from decaying. Researchers adhering to strict scientific standards have not substantiated these claims. ==Related== ===Hierarchical structure=== The hierarchical structures of some organizations are sometimes described as pyramids. This often includes sports league systems. ===Game show=== ''Pyramid (game show)'' is the name of a game show currently in syndication. ===Novel=== ''Pyramids (Discworld)'' is a Discworld novel by Terry Pratchett. ===Album=== Pyramid (album) is a concept album by The Alan Parsons Project, released in 1978. ===Magazine=== ''Pyramid (magazine)'' is an online magazine publishing role-playing game and other game articles, published by Steve Jackson Games. ===Confidence game=== A pyramid scheme is a phony business, similar to a chain letter, that involves the exchange of money primarily for enrolling other people into the scheme. ==External links== *[http://www.mathconsult.ch/showroom/unipoly/ The Uniform Polyhedra] *[http://www.georgehart.com/virtual-polyhedra/vp.html Virtual Reality Polyhedra] The Encyclopedia of Polyhedra Pyramids Self-dual polyhedra ms:Piramid simple:Pyramid
Pyramid
== Picture of the Pyramide in front of Le Louvres in Paris == We can't use pictures from this pyramid since its architect holds a copyright on it. == Esoterism == I don't know, but it seems sort of strange to talk about the "esoteric properties" of pyramids as if they were fact. AFAIK, scientific research hasn't proven this stuff, and my BS detector spikes on the mention of blades being dulled by moonlight. User:Zetawoof 22:35, 25 Oct 2004 (UTC) : It was all added by a ''single'' author (an anon): [http://en.wikipedia.org/w/wiki.phtml?title=Pyramid&diff=5956754&oldid=5956659]. Maybe that's why the one-person style looks a bit idiosyncratic. --User:Menchi 23:33, 25 Oct 2004 (UTC)
See other meanings of words starting from letter:
P
PA | PB | PC | PD | PE | PF | PG | PH | PI | PJ | PK | PL | PM | PN | PO | PR | PS | PT | PU | PW | PX | PY | PZ |Words begining with Pyramid:
Pyramid
Pyramid
Pyramidal
Pyramidal
Pyramidal
Pyramidal_cell
Pyramidal_cell
Pyramidal_cells
Pyramidal_cells
Pyramidal_motor_system
Pyramidal_neuron
Pyramidal_number
Pyramidal_orchid
Pyramidal_tract
Pyramidal_Tracts
Pyramidal_Tracts
Pyramidas
Pyramide
Pyramide
Pyramiden
Pyramidenkogel_Tower
Pyramiden_(short_stories)
Pyramiden_(short_stories)
Pyramides_(Paris_Metro)
Pyramids
Pyramids
Pyramids_(Discworld)
Pyramids_(Egyptian)
Pyramids_of_Egypt
Pyramids_of_Giza
Pyramids_of_Gizeh
Pyramids_of_Guimar
Pyramids_of_Güímar
Pyramids_of_Güímar
Pyramids_of_Mars
Pyramids_of_Nubia
Pyramid_(album)
Pyramid_(game_show)
Pyramid_(magazine)
Pyramid_(solitaire)
Pyramid_Arena
Pyramid_Arena_(Memphis,_TN)
Pyramid_at_Meidun
Pyramid_Breweries,_Inc.
Pyramid_Breweries,_Inc.
Pyramid_Club
Pyramid_Dam
Pyramid_inch
Pyramid_Lake
Pyramid_Lake_(California)
Pyramid_Lake_(disambiguation)
Pyramid_Lake_Indian_Reservation
Pyramid_magazine
Pyramid_Mountain
Pyramid_Mountain_(Alberta)
Pyramid_Mountain_(Alberta)
Pyramid_of_Cestius
Pyramid_of_Cestius
Pyramid_of_Cheops
Pyramid_of_Cholula
Pyramid_of_Djoser
Pyramid_of_Djoser
Pyramid_of_Djozer
Pyramid_of_Djzoser
Pyramid_of_Djzosèr
Pyramid_of_Khafra
Pyramid_of_Khafre
Pyramid_of_Khufu
Pyramid_of_Menkaura
Pyramid_of_Menkaure
Pyramid_of_the_Moon
Pyramid_of_the_Sun
Pyramid_of_value
Pyramid_Party_of_India
Pyramid_Peak
Pyramid_Peak_(Colorado)
Pyramid_Poker
Pyramid_poker
Pyramid_power
Pyramid_power
Pyramid_Rock_Festival
Pyramid_scheme
Pyramid_scheme
Pyramid_schemes
Pyramid_selling_scheme
Pyramid_Technology
Pyramid_Texts
Pyramid_Texts
Pyramid_texts
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