# Difference between revisions of "Pyramid"

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A '''pyramid''' is a polygon structure in which the base is surmounted by three or more triangular sides which meet at a common apex. These structures have been built for thousands of years, in such diverse areas as Egypt, Mexico, North America, China and India. Pyramids have either smooth sides, like the famous pyramids in Egypt, or stepped sides similar to those built by the Mayans in Mexico. | A '''pyramid''' is a polygon structure in which the base is surmounted by three or more triangular sides which meet at a common apex. These structures have been built for thousands of years, in such diverse areas as Egypt, Mexico, North America, China and India. Pyramids have either smooth sides, like the famous pyramids in Egypt, or stepped sides similar to those built by the Mayans in Mexico. | ||

− | The ancient Egyptians built their pyramids as burial places for their [[pharaohs]]. They were constructed of stone [[masonry]] and most commonly have four sides and a square base. The Great Pyramid of Giza is one of the [[Seven Wonders of the Ancient World]], and the only one remaining today. | + | The ancient Egyptians built their pyramids as burial places for their [[pharaohs]]. They were constructed of stone [[masonry]] and most commonly have four sides and a square base. The Great Pyramid of Giza is one of the [[Seven Wonders of the Ancient World]], and the only one remaining today. |

+ | |||

+ | ==Geometry== | ||

+ | The volume of a square-based pyramid: | ||

+ | :<math>V= \frac{1}{3}Bh</math> | ||

+ | '''''V''''' is the overall volume of a pyramid. '''''B''''' equals the area of the base, and '''''h''''' is the perpendicular height<ref>http://math.about.com/od/formulas/ss/surfaceareavol_5.htm</ref><ref>http://www.math.com/tables/geometry/volumes.htm</ref><ref>http://www.mathsisfun.com/geometry/pyramids.html</ref>. | ||

==See Also== | ==See Also== | ||

*[[Food Pyramid]] | *[[Food Pyramid]] | ||

+ | |||

+ | ==References== | ||

+ | <small><references/></small> | ||

==External Links== | ==External Links== |

## Revision as of 09:07, 23 August 2011

A **pyramid** is a polygon structure in which the base is surmounted by three or more triangular sides which meet at a common apex. These structures have been built for thousands of years, in such diverse areas as Egypt, Mexico, North America, China and India. Pyramids have either smooth sides, like the famous pyramids in Egypt, or stepped sides similar to those built by the Mayans in Mexico.

The ancient Egyptians built their pyramids as burial places for their pharaohs. They were constructed of stone masonry and most commonly have four sides and a square base. The Great Pyramid of Giza is one of the Seven Wonders of the Ancient World, and the only one remaining today.

## Contents

## Geometry

The volume of a square-based pyramid:

* V* is the overall volume of a pyramid.

*equals the area of the base, and*

**B***is the perpendicular height*

**h**^{[1]}

^{[2]}

^{[3]}.

## See Also

## References

- ↑ http://math.about.com/od/formulas/ss/surfaceareavol_5.htm
- ↑ http://www.math.com/tables/geometry/volumes.htm
- ↑ http://www.mathsisfun.com/geometry/pyramids.html