height

Height - Wikipedia Height From Wikipedia, the free encyclopedia Jump to navigation Jump to search For other uses, see Height (disambiguation). For the ISO definitions, see Altitude, height, and depth. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (November 2015) (Learn how and when to remove this template message) A cuboid demonstrating the dimensions length, width, and height. Height is the measure of vertical distance, either how "tall" something or someone is, or how "high" the position is. For example, "The height of that building is 50 m" or "The height of an airplane is about 10,000 m". When the term is used to describe how high something like an airplane or a mountain peak is from sea level, height is more often called altitude.[1] In a cartesian space, height is measured along the vertical axis (y) between a specific point and another that does not have the same y-value. If both points happen to have the same y-value, then their relative height equals to zero. Contents 1 Etymology 2 In mathematics 3 In geosciences 3.1 In geology 3.2 In geodesy 4 In aviation 5 In human culture 6 See also 7 References 8 External links Etymology[edit] The English-language word high is derived from Old English hēah, ultimately from Proto-Germanic *xauxa-z, from a PIE base *keuk-. The derived noun height, also the obsolete forms heighth and highth, is from Old English híehþo, later héahþu, as it were from Proto-Germanic *xaux-iþa. In mathematics[edit] In elementary models of space, height may indicate the third dimension, the other two being length and width. Height is normal to the plane formed by the length and width. Height is also used as a name for some more abstract definitions. These include: The altitude of a triangle, which is the length from a vertex of a triangle to the line formed by the opposite side; A measurement in a circular segment of the distance from the midpoint of the arc of the circular segment to the midpoint of the line joining the endpoints of the arc (see diagram in circular segment); In a rooted tree, the height of a vertex is the length of the longest downward path to a leaf from that vertex; In algebraic number theory, a "height function" is a measurement related to the minimal polynomial of an algebraic number; among other uses in commutative algebra and representation theory. In geosciences[edit] Further information: Elevation In geology[edit] Further information: Above mean sea level Although height is relative to a plane of reference, most measurements of height in the physical world are based upon a zero surface, known as sea level. Both altitude and elevation, two synonyms for height, are usually defined as the position of a point above the mean sea level. One can extend the sea-level surface under the continents: naively, one can imagine a lot of narrow canals through the continents. In practice, the sea level under a continent has to be computed from gravity measurements, and slightly different computational methods exist; see Geodesy, heights. In geodesy[edit] Main article: Geodesy § Heights Further information: Orthometric height Instead of using the sea level, geodesists often prefer to define height from the surface of a reference ellipsoid, see Geodetic system, vertical datum. Defining the height of geographic landmarks becomes a question of reference. For example, the highest mountain by elevation in reference to sea level belongs to Mount Everest, located on the border of Nepal and Tibet, China; however the highest mountain by measurement of apex to base belongs to Mauna Kea in Hawaii, United States. In aviation[edit] Further information: Altitude § In aviation In aviation terminology, the terms height, altitude, and elevation are not synonyms. Usually, the altitude of an aircraft is measured from sea level, while its height is measured from ground level. Elevation is also measured from sea level, but is most often regarded as a property of the ground. Thus, elevation plus height can equal altitude, but the term altitude has several meanings in aviation. In human culture[edit] Human height is one of the areas of study within anthropometry. While height variations within a population are largely genetic, height variations between populations are mostly environmental.[citation needed] The United Nations uses height (among other statistics) to monitor changes in the nutrition of developing nations. In human populations, average height can distill down complex data about the group's birth, upbringing, social class, diet, and health care system. See also[edit] Acrophobia (fear of heights) Centimetre–gram–second system of units Chinese units of measurement Elevation Human height Imperial units International System of Units United States customary units Vertical metre References[edit] ^ Strahler, Alan (2006). Introducing Physical Geography. Wiley,New York.  External links[edit] Look up height in Wiktionary, the free dictionary. Look up high in Wiktionary, the free dictionary. Retrieved from "https://en.wikipedia.org/w/index.php?title=Height&oldid=841814970" Categories: LengthHidden categories: Articles needing additional references from November 2015All articles needing additional referencesAll articles with unsourced statementsArticles with unsourced statements from March 2017 Navigation menu Personal tools Not logged inTalkContributionsCreate accountLog in Namespaces ArticleTalk Variants Views ReadEditView history More Search Navigation Main pageContentsFeatured contentCurrent eventsRandom articleDonate to WikipediaWikipedia store Interaction HelpAbout WikipediaCommunity portalRecent changesContact page Tools What links hereRelated changesUpload fileSpecial pagesPermanent linkPage informationWikidata itemCite this page Print/export Create a bookDownload as PDFPrintable version In other projects Wikimedia Commons Languages AfrikaansAlemannischالعربيةAragonésAzərbaycancaবাংলাБеларускаяБългарскиBoarischBrezhonegCatalàCebuanoDeutschΕλληνικάEsperantoفارسیFrançaisGalegoગુજરાતી한국어HrvatskiBahasa Indonesiaעבריתಕನ್ನಡKurdîКыргызчаLatinaLingálaMagyarМакедонскиमराठीBahasa Melayu日本語NordfriiskNorskNorsk nynorskOccitanਪੰਜਾਬੀPortuguêsRomânăРусскийScotsSimple EnglishSlovenščinaکوردیSrpskohrvatski / српскохрватскиSuomiதமிழ்TarandíneไทยTürkçeУкраїнськаاردوייִדיש中文 Edit links This page was last edited on 18 May 2018, at 07:30. 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