A pyramid is any three-dimensional structure where the upper surfaces are triangular and converge on one point.Pyramid may refer to:Pyramid (geometry), a conic solid with polygonal baseEgyptian pyramids, Pyramids of EgyptHuman pyramid, a stunt usually performed by circus artists or by amateursPopulation pyramid, in demography, two back-to-back bar graphs, one showing the number of males and one showing females in a particular population in five-year age groupsFood guide pyramid, informally known as the food pyramid, a US-American nutrition guidePyramid of medulla oblongata, a structure in the medulla oblongataa hierarchical structure of some organizations
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