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In plane geometry, a lune (from Latin luna 'moon') is the concave-convex region bounded by two circular arcs. It has one boundary portion for which the connecting segment of any two nearby points moves outside the region and another boundary portion for which the connecting segment of any two nearby points lies entirely inside the region. A convex-convex region is termed a lens. Formally, a lune is the relative complement of one disk in another (where they intersect but neither is a subset of the other). Alternatively, if and are disks, then is a lune.

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  • في الهندسة، الهلال هو أحد شكلين يشبهان تقريبًا هلال القمر. (ar)
  • Στην , ο μηνίσκος (lune) είναι μια κοίλη-κυρτή περιοχή που οριοθετείται από δύο κυκλικά τόξα, ενώ μια κυρτή-κυρτή περιοχή ονομάζεται . Ετυμολογικά, η λέξη «μηνίσκος» είναι αρχαία ελληνική (Μήνη = Σελήνη και μηνίσκος = ημισέληνος). Τυπικά, ένας μηνίσκος είναι το ενός δίσκου σε έναν άλλον (όπου τέμνονται, αλλά δεν είναι υποσύνολο ο ένας του άλλου). Εναλλακτικά, αν A και B είναι δίσκοι, τότε υπάρχει μηνίσκος L όταν ισχύει: (el)
  • En geometrio, luno estas ĉiu el du similaj figuroj priskribitaj sube. (eo)
  • En geometría se denomina lúnula a cualquiera de las dos figuras con forma semejante a la de una luna creciente obtenidas mediante la intersección de dos círculos. La palabra lúnula deriva del latín lunŭla, diminutivo de luna.​ (es)
  • En géométrie plane, une lunule est la surface concave-convexe délimitée par deux arcs de cercles (alors que la surface convexe-convexe délimitée par deux arcs de cercles est la version plane d'une lentille bi-convexe). Le mot lunule vient de luna, le mot latin désignant la Lune, qui vue de la Terre ressemble à une lunule entre la nouvelle lune et le premier quartier ainsi qu'entre le dernier quartier et la prochaine nouvelle lune (en réalité le croissant de lune est délimité par un cercle et une ellipse concentriques). (fr)
  • In plane geometry, a lune (from Latin luna 'moon') is the concave-convex region bounded by two circular arcs. It has one boundary portion for which the connecting segment of any two nearby points moves outside the region and another boundary portion for which the connecting segment of any two nearby points lies entirely inside the region. A convex-convex region is termed a lens. Formally, a lune is the relative complement of one disk in another (where they intersect but neither is a subset of the other). Alternatively, if and are disks, then is a lune. (en)
  • In geometria piana, una lùnula è un insieme di punti del piano compresi tra due archi di cerchio aventi gli estremi in comune e situati dalla stessa parte rispetto alla retta passante per tali estremi. In particolare, se e sono cerchi la cui intersezione non è espressa dall'insieme vuoto e non sono l'uno contenuto nell'altro, la loro lunula è il complementare . Nel V secolo a.C., il matematico greco Ippocrate di Chio dimostrò che alcune lunule possono essere costruite con riga e compasso. Il termine deriva dal latino lunŭla, diminutivo di luna. (it)
  • 달꼴은 두개의 원호를 경계로 하는 오목하고 볼록한 영역이다. 하나의 원에서 그 원과 교차하는 다른 원을 뺀 영역이다. (ko)
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  • في الهندسة، الهلال هو أحد شكلين يشبهان تقريبًا هلال القمر. (ar)
  • Στην , ο μηνίσκος (lune) είναι μια κοίλη-κυρτή περιοχή που οριοθετείται από δύο κυκλικά τόξα, ενώ μια κυρτή-κυρτή περιοχή ονομάζεται . Ετυμολογικά, η λέξη «μηνίσκος» είναι αρχαία ελληνική (Μήνη = Σελήνη και μηνίσκος = ημισέληνος). Τυπικά, ένας μηνίσκος είναι το ενός δίσκου σε έναν άλλον (όπου τέμνονται, αλλά δεν είναι υποσύνολο ο ένας του άλλου). Εναλλακτικά, αν A και B είναι δίσκοι, τότε υπάρχει μηνίσκος L όταν ισχύει: (el)
  • En geometrio, luno estas ĉiu el du similaj figuroj priskribitaj sube. (eo)
  • En geometría se denomina lúnula a cualquiera de las dos figuras con forma semejante a la de una luna creciente obtenidas mediante la intersección de dos círculos. La palabra lúnula deriva del latín lunŭla, diminutivo de luna.​ (es)
  • En géométrie plane, une lunule est la surface concave-convexe délimitée par deux arcs de cercles (alors que la surface convexe-convexe délimitée par deux arcs de cercles est la version plane d'une lentille bi-convexe). Le mot lunule vient de luna, le mot latin désignant la Lune, qui vue de la Terre ressemble à une lunule entre la nouvelle lune et le premier quartier ainsi qu'entre le dernier quartier et la prochaine nouvelle lune (en réalité le croissant de lune est délimité par un cercle et une ellipse concentriques). (fr)
  • In plane geometry, a lune (from Latin luna 'moon') is the concave-convex region bounded by two circular arcs. It has one boundary portion for which the connecting segment of any two nearby points moves outside the region and another boundary portion for which the connecting segment of any two nearby points lies entirely inside the region. A convex-convex region is termed a lens. Formally, a lune is the relative complement of one disk in another (where they intersect but neither is a subset of the other). Alternatively, if and are disks, then is a lune. (en)
  • In geometria piana, una lùnula è un insieme di punti del piano compresi tra due archi di cerchio aventi gli estremi in comune e situati dalla stessa parte rispetto alla retta passante per tali estremi. In particolare, se e sono cerchi la cui intersezione non è espressa dall'insieme vuoto e non sono l'uno contenuto nell'altro, la loro lunula è il complementare . Nel V secolo a.C., il matematico greco Ippocrate di Chio dimostrò che alcune lunule possono essere costruite con riga e compasso. Il termine deriva dal latino lunŭla, diminutivo di luna. (it)
  • 달꼴은 두개의 원호를 경계로 하는 오목하고 볼록한 영역이다. 하나의 원에서 그 원과 교차하는 다른 원을 뺀 영역이다. (ko)
rdfs:label
  • هلال (رياضيات) (ar)
  • Μηνίσκος (γεωμετρία) (el)
  • Luno (geometrio) (eo)
  • Lúnula (geometría) (es)
  • Lunule (géométrie) (fr)
  • Lunula (matematica) (it)
  • Lune (geometry) (en)
  • 달꼴 (기하학) (ko)
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