Дванадесетоъгълник

Правилен дванадесетоъгълник

Дванадесетоъгълникът (също и додекагон, от старогръцки: δώδεκα + γωνία – „дванадесет“ + „ъгъл“) е многоъгълник с дванадесет страни и ъгли. Сборът на всички вътрешни ъгли е 1800° (10π). Има 54 диагонала.

Правилен дванадесетоъгълник

При правилния дванадесетоъгълник всички страни и ъгли са равни. Вътрешният ъгъл е 150°, а външният и централният – 30°.

Лице

Лицето S на правилен дванадесетоъгълник може да бъде намерено по три начина:

  • По страната a:

Построение

Тъй като 12 е произведение на 2² и 3, което е просто число на Ферма, правилен дванадесетоъгълник може да бъде построен с линийка и пергел:[1]

Използване

Пана

1–10 страни
11–20 страни
21–30 страни
31–120 страни
(избрани)
≥200 страни
(избрани)
Звездовидни многоъгълници

Източници

  1. ↑ Constructible Polygon, mathworld.wolfram.com
Нормативен контролРедактиране в Уикиданни

Read other articles:

Bulbophyllum helenae

Bulbophyllum helenae Klasifikasi ilmiah Kerajaan: Plantae (tanpa takson): Angiospermae (tanpa takson): Monocots Ordo: Asparagales Famili: Orchidaceae Genus: Bulbophyllum Spesies: Bulbophyllum helenae Nama binomial Bulbophyllum helenae(Kuntze) J.J.Sm. 1912 Bulbophyllum helenae adalah spesies tumbuhan yang tergolong ke dalam famili Orchidaceae. Spesies ini juga merupakan bagian dari ordo Asparagales. Spesies Bulbophyllum helenae sendiri merupakan bagian dari genus Bulbophyllum.[1] Nama...

 

Humberto García Reyes

Mexican politician Humberto García ReyesMember of the Chamber of Deputies for Coahuila′s 1st districtIn office1 September 2006 – 31 August 2009Preceded byJesús María Ramón ValdésSucceeded byFrancisco Saracho Navarro Personal detailsBorn (1953-03-06) 6 March 1953 (age 71)Coahuila, MexicoPolitical party PANOccupationPolitician Ángel Humberto García Reyes (born 6 March 1953) is a Mexican politician formerly affiliated with the National Action Party.[1] As of...

 

Carang gesing

Carang gesing (Hanacaraka: ꦕꦫꦁ​ꦒꦼꦱꦶꦁ) adalah penganan jajanan pasar dari kawasan Surakarta, Jawa Tengah. Bahan utama adalah buah pisang yang dipotong-potong lalu diberi bumbu santan dan rempah penyedap (seperti daun pandan dan garam). Adonan ini lalu dibungkus daun pisang dan kemudian dikukus. Bentuk bungkusan serupa dengan nagasari, tetapi berbeda isinya. Carang gesing biasa dijual pada pagi hari, dapat dimakan dalam bentuk hangat maupun setelah didinginkan. Carang gesing, ...

Oliver Sipple

Pour les articles homonymes, voir Sipple. Cet article est une ébauche concernant une personnalité américaine et l’homosexualité, la bisexualité ou la transidentité. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants. Oliver SippleBiographieNaissance 20 novembre 1941DétroitDécès 2 février 1989 (à 47 ans)San FranciscoSépulture Cimetière national de Golden GateNationalité américaineActivité Milit...

 

Синелобый амазон

Синелобый амазон Научная классификация Домен:ЭукариотыЦарство:ЖивотныеПодцарство:ЭуметазоиБез ранга:Двусторонне-симметричныеБез ранга:ВторичноротыеТип:ХордовыеПодтип:ПозвоночныеИнфратип:ЧелюстноротыеНадкласс:ЧетвероногиеКлада:АмниотыКлада:ЗавропсидыКласс:Пт�...

 

COVID-19 pandemic in Azerbaijan

Ongoing COVID-19 viral pandemic in Azerbaijan COVID-19 pandemic in AzerbaijanTop to bottom, left to right: Journalists having an interview with the patrolling servicemen A modular hospital complex in Gabala New ambulances in Baku Beds at a modular hospital complex in Ismayilli President Ilham Aliyev during a video conference on measures taken to combat the COVID-19 pandemic DiseaseCOVID-19Virus strainSARS-CoV-2LocationAzerbaijanFirst outbreakWuhan, Hubei, China; IranIndex caseBakuArrival date...

Leah LaBelle

Leah Labelle pada tahun 2012 Leah LaBelle Vladowski (8 September 1986 – 31 Januari 2018) adalah seorang penyanyi Amerika Serikat. ia naik daun pada tahun 2004 sebagai kontestan pada musim ketiga American Idol dan lalu memasuki peringkat ke-12 pada final musim ini. Pada tahun 2007 LaBelle mulai merekam cover R&B dan musik soul untuk kanal YouTube miliknya. Video-video ini lalu mendapatkannya pekerjaan sebagai vokalis latar belakang mulai tahun 2008 dan mendapatkannya kontrak rekaman deng...

 

Jason Acuña

American stunt performer and television personality (born 1973) Wee Man redirects here. For the 2013 film, see The Wee Man. For the Scottish entertainer, see The Wee Man (comedian). Jason Wee Man AcuñaAcuña in 2009BornJason Shannon Acuña (1973-05-16) May 16, 1973 (age 50)Pisa, Tuscany, ItalyNationalityAmericanOther namesWee ManEducationNorth Torrance High SchoolOccupation(s)Stunt performer, television personality, skateboarder, actorYears active1996–presentKnown forCo...

 

Battle of Sambisa Forest (2021)

Battle between ISWAP and Boko Haram in northeastern Nigeria in 2021 Battle of Sambisa ForestPart of the Boko Haram insurgencyDate14–19 May 2021LocationSambisa Forest, Borno State, Nigeria11°15′00″N 13°25′00″E / 11.25000°N 13.41667°E / 11.25000; 13.41667Result ISWAP victoryTerritorialchanges Sambisa Forest is captured by ISWAPBelligerents Islamic State Boko Haram Islamic State West Africa Province (ISWAP)Commanders and leaders Abubakar Shekau † ...

Dalveer Bhandari

Dalveer Bhandari Hakim Mahkamah InternasionalPetahanaMulai menjabat 2012 Informasi pribadiKebangsaanIndiaProfesiHakim, yurisSunting kotak info • L • B Dalveer Bhandari adalah seorang yuris (ahli hukum) asal India yang dikenal akan kiprahnya sebagai hakim pada Mahkamah Internasional. Ia mulai menjabat sebagai hakim pada mahkamah tersebut pada tahun 2012.[1] Referensi ^ All Members: Members of the Court past and present. Mahkamah Internasional. Diakses tanggal 9 Juni 2...

 

Thomas Cromwell

English statesman and politician This article is about the minister of King Henry VIII of England. For other uses, see Thomas Cromwell (disambiguation). Thomas CromwellPortrait of Thomas Cromwell,Hans Holbein the Younger (1532–1533)Lord Great ChamberlainIn office17 April 1540 – 10 June 1540MonarchHenry VIIIPreceded byJohn de Vere, 15th Earl of OxfordSucceeded byRobert Radcliffe, 1st Earl of SussexGovernor of the Isle of WightIn office2 November 1538 – 10 June 1540Monar...

 

Rhineland-Palatinate Police

State police of Rhineland-Palatinate The Rhineland-Palatinate State Police is the state police (Landespolizei) of the German federal state of Rhineland-Palatinate and numbers ca. 9,000 police officers. The five regional police authorities are headquartered in Koblenz, Trier, Mainz, Kaiserslautern and Ludwigshafen. The sleeve patch of the Rhineland-Palatinate Police. Just like Hesse, Rhineland-Palatinate abolished the “green star” ranks; meaning Rhineland-Palatinate's police officers will ...

أندري هونبال

أندري هونبال (بالفرنسية: André Hunebelle)‏  معلومات شخصية اسم الولادة (بالفرنسية: André Henri Hunebelle)‏  الميلاد 1 سبتمبر 1896(1896-09-01)ميدون  الوفاة 27 نوفمبر 1985 (89 سنة) [1]  نيس  مواطنة فرنسا  الحياة العملية المهنة مخرج أفلام،  وكاتب سيناريو،  وفنان زجاج ملون  [لغات...

 

Procurador-Geral dos Estados Unidos

Esta página cita fontes, mas que não cobrem todo o conteúdo. Ajude a inserir referências. Conteúdo não verificável pode ser removido.—Encontre fontes: ABW  • CAPES  • Google (N • L • A) (Janeiro de 2023) Procurador-geral dos Estados Unidos Attorney General of the United States Selo do Departamento de Justiça dos EUA. No cargoMerrick Garlanddesde 10 de março de 2021 Departamento de Justiça Estado Estados Unidos Desi...

 

Flavacourt

Flavacourtcomune Flavacourt – Veduta LocalizzazioneStato Francia RegioneAlta Francia Dipartimento Oise ArrondissementBeauvais CantoneBeauvais-2 TerritorioCoordinate49°21′N 1°49′E49°21′N, 1°49′E (Flavacourt) Superficie18,45 km² Abitanti726[1] (2009) Densità39,35 ab./km² Altre informazioniCod. postale60590 Fuso orarioUTC+1 Codice INSEE60235 CartografiaFlavacourt Sito istituzionaleModifica dati su Wikidata · Manuale Flavacourt è un comune francese ...

Vehículo todoterreno

«Cuatro por cuatro» redirige aquí. Para la telenovela brasileña, véase Cuatro por Cuatro (telenovela). Un vehículo todoterreno, campero,[1]​ o yip,[2]​ es un tipo de vehículo diseñado para ser conducido en Todoterreno. Estos vehículos surgieron como necesidad en las guerras del principio del siglo XX, y fueron adaptados para uso civil y aprovechados para realizar travesías, vigilar zonas protegidas y moverse en terrenos ásperos o resbaladizos. Casi todos los vehíc...

 

Cane fortunato

Cane fortunatoTitolo originaleThe Lucky Dog Lingua originaleinglese Paese di produzioneStati Uniti d'America Anno1921 Durata24 min 17 min (versione tagliata) Dati tecniciB/Nrapporto: 1,33:1film muto Generecomico RegiaJess Robbins SceneggiaturaJess Robbins ProduttoreGilbert M. Anderson Casa di produzioneSun-Lite Pictures Distribuzione in italianoGlobal Television Services FotografiaIrving G. Ries Interpreti e personaggi Stan Laurel: giovanotto Florence Gilbert: ragazza Oliver Hardy: bandito Ja...

 

Skindergade 22

Listed building in Copenhagen Skindergade 22General informationLocationCopenhagen, DenmarkCoordinates55°40′47.64″N 12°34′28.9″E / 55.6799000°N 12.574694°E / 55.6799000; 12.574694Completed1810 Skindergade 22 is a Neoclassical building situated at the corner of Skindergade and Lille Kannikestræde in the Old Town of Copenhagen, Denmark. It was listed in the Danish registry of protected buildings and places in 1979. Jens Andersen Hansen, publisher of the newsp...

ذا راسموس

ذا راسموس   معلومات شخصية الحياة الفنية النوع روك بديل،  وبوب روك  شركة الإنتاج وارنر ميوزك غروب،  ومجموعة يونيفرسال الموسيقية  اللغات الإنجليزية  المواقع الموقع الموقع الرسمي  IMDB صفحته على IMDB  تعديل مصدري - تعديل   ذا راسموس ذا راسموس (The Rasmus) فرقة فنل...

 

Cepheid variable

Type of variable star that pulsates radially Cepheid redirects here. For other uses, see Cepheid (disambiguation). RS Puppis, one of the brightest known Cepheid variable stars in the Milky Way galaxy(Hubble Space Telescope) A Cepheid variable (/ˈsɛfi.ɪd, ˈsiːfi-/) is a type of variable star that pulsates radially, varying in both diameter and temperature. It changes in brightness, with a well-defined stable period and amplitude. Cepheids are important cosmic benchmarks for scaling galact...