Rază

Geometrie

Proiecția unei sfere pe un plan

Concepte
Caracteristici

Dimensiune

Construcții cu rigla și compasul

Zerodimensional

Punct

Unidimensional

Bidimensional

Triunghi
Plan Arie Poligon
Înălțime Ipotenuză Teorema lui Pitagora
Paralelogram
Pătrat Dreptunghi Romb
Patrulater
Romboid Trapez
Conică
Cerc Circumferință Diametru Rază Disc Elipsă Hiperbolă Parabolă

Tridimensional

Volum

Cvadri- și n-dimensional

În geometria clasică o rază a unui cerc sau a unei sfere este o dreaptă ce unește centrul acesteia de unul din punctele sale. La aceste figuri, raza este 1/2 din diametru.

Raza Pământului este distanța medie de la centrul geometric al Terrei până la suprafața sa (neregulată). În știință și tehnică, pentru obiectele necirculare și nesferice, mai este folosit termenul de „rază de curbură”, referitor la curbura locală din puncte anume de la periferia acestora.

Mai general - în geometrie, tehnică, studiul graficelor, și multe alte contexte - raza (unui cilindru, a unui poligon, a unui grafic, a unei componente mecanice etc.) este distanța de la centrul sau axa de simetrie a unui corp până la punctele ce delimitează corpul. În acest caz, raza poate fi mai mult de jumătate din diametru.

Relația dintre rază și circumferința unui cerc este $r={\frac {c}{2\pi }}$ .

Vezi și

Acest articol legat de matematică este deocamdată un ciot. Poți ajuta Wikipedia prin completarea lui.

Read other articles:

1583 en France

Chronologie de la France ◄◄ 1579 1580 1581 1582 1583 1584 1585 1586 1587 ►► 22 Chronologies Données clés 1580 1581 1582 1583 1584 1585 1586Décennies :1550 1560 1570 1580 1590 1600 1610Siècles :XIVe XVe XVIe XVIIe XVIIIeMillénaires :-Ier Ier IIe IIIe Chronologies thématiques Art Architecture, Arts plastiques (Dessin, Gravure, Peinture et Sculpture), Littérature et Musique classique Ingénierie (), Architectur...

Bukit Besi

Bukit Besi Bukit Besi adalah kota kecil yang terletak di daerah Dungun, Terengganu, Malaysia. Kota ini juga dikenal dengan nama Bukit Batu Besi. Namanya berasal dari aktivitas pertambangan biji besi di kota ini. Koordinat Bukit Besi adalah 4°45' Utara, 103°10' Timur. Referensi [1] ^ Sejarah pertambangan bijih besi di Bukit Besi[pranala nonaktif permanen] lbs Terengganu Darul ImanDaerahKuala Terengganu • Hulu Terengganu • Besut • Setiu • Marang • Dungun • KemamanK...

Ruslan Nigmatullin

Ruslan Nigmatullin Nazionalità Russia Altezza 188 cm Peso 79 kg Calcio Ruolo Portiere Termine carriera 3 novembre 2009 Carriera Giovanili 1993-1994 Rubin-TAN Kazan' Squadre di club1 1992-1994 KAMAZ20 (-?)1995-1997 Spartak Mosca27 (-?)1998-2001 Lokomotiv Mosca115 (-?)2002 Verona1 (-3)2002→ CSKA Mosca14 (-?)2003→ Salernitana14 (-22)2003-2004 Lokomotiv Mosca1 (-?)2004-2005 Terek Groznyj19 (-?)2008 SKA Rostov15 (-?)2009 Lokomoti...

ロバート・デ・ニーロ

ロバート・デ・ニーロRobert De Niro 2011年のデ・ニーロ生年月日 (1943-08-17) 1943年8月17日（80歳）出生地アメリカ合衆国・ニューヨーク州ニューヨーク市身長 177 cm職業俳優、映画監督、映画プロデューサージャンル映画、テレビドラマ活動期間 1963年 -配偶者ダイアン・アボット（1976年 - 1988年）グレイス・ハイタワー（1997年 - ）主な作品『ミーン・ストリート』（1973年）...

Bainbridge Colby

American politician (1869–1950) Bainbridge Colby43rd United States Secretary of StateIn officeFebruary 13, 1920 – March 4, 1921PresidentWoodrow WilsonPreceded byRobert LansingSucceeded byCharles Evans HughesMember of the New York State Assemblyfrom the 29th New York County districtIn officeJanuary 1, 1901 – December 31, 1902Preceded byHal BellSucceeded byGeorge B. Clark Personal detailsBorn(1869-12-22)December 22, 1869St. Louis, Missouri, U.S.DiedApril 11, 1950(1950-04...

Timeline of the COVID-19 pandemic in Wales (2021)

2021 Welsh daily pandemic-related events Part of a series on theCOVID-19 pandemicin the United Kingdom, British Overseas Territories and Crown Dependencies History Responses Legislation Statistics (Part of the global COVID-19 pandemic) Locations London Countries England Scotland Wales Northern Ireland Crown Dependencies Guernsey Isle of Man Jersey British Overseas Territories Anguilla Akrotiri and Dhekelia Bermuda British Indian Ocean Territory British Virgin Islands Cayman Islands Falkland I...

Rai Corporation Canada

Rai Corporation CanadaItalian Radio TV SystemLogo Stato Canada Fondazione18 febbraio 1987 Chiusura12 aprile 2012 Sede principaleToronto GruppoRAI Settoreprogrammi televisivi e radiofonici Sito webwww.raicorp.net Modifica dati su Wikidata · Manuale Rai Corporation Canada - Italian Radio TV System era una società della RAI che produceva, distribuiva e commercializzava programmi radiofonici e televisivi del proprio gruppo in Canada. La società era posseduta completamente da Rai Corp...

Чайки

У этого термина существуют и другие значения, см. Чайки (значения). Чайки Доминиканская чайкаЗападная чайкаКалифорнийская чайкаМорская чайка Научная классификация Домен:ЭукариотыЦарство:ЖивотныеПодцарство:ЭуметазоиБез ранга:Двусторонне-симметричныеБез ранга:Вторич...

Auction Hunters

American TV series or program Auction HuntersGenreRealityStarring Allen Lee Haff Clinton Jones Country of originUnited StatesOriginal languageEnglishNo. of seasons5No. of episodes107 (list of episodes)ProductionExecutive producers Scott Gurney Deirdre Gurney Camera setupMultipleRunning time22 minutesProduction companyGurney ProductionsOriginal releaseNetworkSpikeReleaseNovember 9, 2010 (2010-11-09) –May 9, 2015 (2015-05-09) Auction Hunters is an American reality television s...

Stockton, New South Wales

Suburb of Newcastle, New South Wales, AustraliaStocktonNewcastle, New South WalesThe northern breakwater in Stockton at the entrance to Newcastle HarbourStocktonCoordinates32°54′54″S 151°47′4″E / 32.91500°S 151.78444°E / -32.91500; 151.78444Population4,160 (2016 census)[1] • Density1,133.8/km2 (2,937/sq mi)Postcode(s)2295Elevation6 m (20 ft)[Note 1]Area3.7 km2 (1.4 sq mi)[Note 2]Ti...

Сергиенко, Николай Егорович

В Википедии есть статьи о других людях с такой фамилией, см. Сергиенко; Сергиенко, Николай. Николай Егорович Сергиенко Дата рождения 1924 Место рождения Сухая Балка, Криворожский городской совет Дата смерти 17 апреля 1945(1945-04-17) Место смерти Вена, Австрия Принадлежность &...

土库曼斯坦总统

土库曼斯坦总统土库曼斯坦国徽土库曼斯坦总统旗現任谢尔达尔·别尔德穆哈梅多夫自2022年3月19日官邸阿什哈巴德总统府（Oguzkhan Presidential Palace）機關所在地阿什哈巴德任命者直接选举任期7年，可连选连任首任萨帕尔穆拉特·尼亚佐夫设立1991年10月27日土库曼斯坦土库曼斯坦政府与政治国家政府土库曼斯坦宪法国旗国徽国歌立法機關（英语：National Council of Turkmenistan） ...

Langley Speedway (British Columbia)

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.Find sources: Langley Speedway British Columbia – news · newspapers · books · scholar · JSTOR (December 2022) (Learn how and when to remove this message) Langley SpeedwayLocationLangley, British ColumbiaOpened1963Closed1984Former namesAction RacewayMajor eventsNASCAR Wi...

まいまいクラブ

まいまいクラブは、毎日新聞の読者を主対象とした会員制のポータルサイトである。2005年10月にサービスを開始した。会員制ポータルサイトとしては日本の新聞社として初めての試みである[要出典]。名称は「My-Mai」で私の生活の中にある毎日新聞というイメージから付けられた。また、ペットキャラクターにカタツムリを使用し、地球環境保全にも力を尽くすこ...

Lofoyi (rivière, affluent de la Lufira)

Pour les articles homonymes, voir Lofoi. LofoyiLofoï Caractéristiques Longueur 97 km Bassin collecteur Congo Cours Source Parc national des Kundelungu Confluence Lufira · Localisation Parc national des Kundelungu Géographie Pays traversés République démocratique du Congo modifier La Lofoyi ou Lofoï est une rivière du territoire de Kasenga dans la province du Haut-Katanga en république démocratique du Congo. v · mAffluents et (sous-affluents) du Congo Moins de 5...

Phencyclidine

Dissociative hallucinogenic drug, mostly used recreationally PhencyclidineClinical dataTrade namesSernyl, Sernylan (both discontinued)Other namesCI-395; Phenylcyclohexylpiperidine; Angel dust[1]AHFS/Drugs.comphencyclidineDependenceliabilityPhysical: Low Psychological: Moderate[2]AddictionliabilityVariable, reported from low to high[3][4]Routes ofadministrationSmoking, injection, snorted, by mouth[5][6]Drug classNMDA receptor antagonists; General...

Manila High School (Intramuros)

This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources.Find sources: Manila High School Intramuros – news · newspapers · books · scholar · JSTOR (December 2014) Secondary public school in PhilippinesManila High School(Mataas na Paaralan ng Maynila)External view of Manila High SchoolAddressVictoria-Muralia Street I...

LVTP-5裝甲車

LVTP-5 LVTP-5类型兩棲裝甲運兵車原产地美国服役记录服役期间1952-参与战争／衝突1958年黎巴嫩危機越戰生产历史研发者博格華納研发日期1950-1951制造数量1124基本规格重量37.4公噸长度9.04公尺宽度3.57公尺高度2.92公尺操作人数3+34 乘員装甲6-16公厘的鋼質裝甲主武器M1919A4機槍(A、A1)、白朗寧M2重機槍(A1與其他款式)、M240通用機槍(LVTH-6)、M49 24倍徑105mm榴彈炮(LVTH-6)、工蜂四型(LVTP-...

Народная песня

Русская народная песня «Возле речки, возле мосту». Дореволюционная открытка Наро́дная пе́сня — музыкально-поэтический жанр фольклора, наиболее распространённый вид народной музыки, продукт коллективного устного творчества. Народная песня отражает характер народа,...

Simone Thion de La Chaume

Si ce bandeau n'est plus pertinent, retirez-le. Cliquez ici pour en savoir plus. Cet article ne cite pas suffisamment ses sources (mai 2014). Si vous disposez d'ouvrages ou d'articles de référence ou si vous connaissez des sites web de qualité traitant du thème abordé ici, merci de compléter l'article en donnant les références utiles à sa vérifiabilité et en les liant à la section « Notes et références ». En pratique : Quelles sources sont attendues ? Comme...