42 relations: Aspect ratio (aeronautics), Aspect ratio (image), Astigmatism (optical systems), Compact space, Computer monitor, Digital image, Display aspect ratio, Domino (mathematics), Equidimensional, Film gauge, Fraction (mathematics), Geometry, Golden ratio, Graphics display resolution, HARMST, Hyperrectangle, IPhone 5, ISO 216, Lens (optics), List of motion picture film formats, Page orientation, Paper size, Photo print sizes, Photolithography, Pixel aspect ratio, Plus sizing, Ratio, Rectangle, Semi-major and semi-minor axes, Shape, Shape factor (image analysis and microscopy), Square, Squeeze mapping, Standard-definition television, Tire code, Video Graphics Array, Web banner, Widescreen, 135 film, 16 mm film, 16:10, 21:9 aspect ratio.

## Aspect ratio (aeronautics)

In aeronautics, the aspect ratio of a wing is the ratio of its span to its mean chord.

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## Aspect ratio (image)

The aspect ratio of an image describes the proportional relationship between its width and its height.

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## Astigmatism (optical systems)

An optical system with astigmatism is one where rays that propagate in two perpendicular planes have different foci.

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## Compact space

In mathematics, and more specifically in general topology, compactness is a property that generalizes the notion of a subset of Euclidean space being closed (that is, containing all its limit points) and bounded (that is, having all its points lie within some fixed distance of each other).

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## Computer monitor

A computer monitor is an output device which displays information in pictorial form.

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## Digital image

A digital image is a numeric representation, normally binary, of a two-dimensional image.

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## Display aspect ratio

The aspect ratio of a display device is the proportional relationship between its width and its height.

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## Domino (mathematics)

In mathematics, a domino is a polyomino of order 2, that is, a polygon in the plane made of two equal-sized squares connected edge-to-edge.

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## Equidimensional

Equidimensional is an adjective applied to objects that have nearly the same size or spread in multiple directions.

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## Film gauge

Film gauge is a physical property of photographic or motion picture film stock which defines its width.

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## Fraction (mathematics)

A fraction (from Latin fractus, "broken") represents a part of a whole or, more generally, any number of equal parts.

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## Geometry

Geometry (from the γεωμετρία; geo- "earth", -metron "measurement") is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space.

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## Golden ratio

In mathematics, two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities.

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## Graphics display resolution

The graphics display resolution is the width and height dimension of an electronic visual display device, such as a computer monitor, in pixels.

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## HARMST

HARMST is an acronym for High Aspect Ratio Microstructure Technology that describes fabrication technologies, used to create high-aspect-ratio microstructures with heights between tens of micrometers up to a centimeter and aspect ratios greater than 10:1.

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## Hyperrectangle

In geometry, an n-orthotopeCoxeter, 1973 (also called a hyperrectangle or a box) is the generalization of a rectangle for higher dimensions, formally defined as the Cartesian product of intervals.

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## IPhone 5

The iPhone 5 is a smartphone designed and marketed by Apple Inc. It is the sixth generation of the iPhone, succeeding the iPhone 4S and preceding the iPhone 5S and iPhone 5C.

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## ISO 216

ISO 216 specifies international standard (ISO) paper sizes used in most countries in the world today, although not in Canada, the United States, Mexico, or the Dominican Republic.

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## Lens (optics)

A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction.

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## List of motion picture film formats

This list of film formats catalogues formats developed for shooting or viewing motion pictures, ranging from the Chronophotographe format from 1888, to mid-20th century formats such as the 1953 CinemaScope format, to more recent formats such as the 1992 IMAX HD format.

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## Page orientation

Page orientation is the way in which a rectangular page is oriented for normal viewing.

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## Paper size

Many paper size standards conventions have existed at different times and in different countries.

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## Photo print sizes

Standard photographic print sizes are used in photographic printing.

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## Photolithography

Photolithography, also termed optical lithography or UV lithography, is a process used in microfabrication to pattern parts of a thin film or the bulk of a substrate.

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## Pixel aspect ratio

Pixel aspect ratio (often abbreviated PAR) is a mathematical ratio that describes how the width of a pixel in a digital image compares to the height of that pixel.

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## Plus sizing

Plus sizing is the practice of replacing an automotive wheel with one of a larger diameter fitted with a new tire of lower aspect ratio so that the new tire has the same diameter and circumference as the original tire to prevent any changes in speedometer accuracy, torque and traction control, while reducing sidewall flex and (generally) increasing cornerning ability.

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## Ratio

In mathematics, a ratio is a relationship between two numbers indicating how many times the first number contains the second.

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## Rectangle

In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles.

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## Semi-major and semi-minor axes

In geometry, the major axis of an ellipse is its longest diameter: a line segment that runs through the center and both foci, with ends at the widest points of the perimeter.

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## Shape

A shape is the form of an object or its external boundary, outline, or external surface, as opposed to other properties such as color, texture or material composition.

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## Shape factor (image analysis and microscopy)

Shape factors are dimensionless quantities used in image analysis and microscopy that numerically describe the shape of a particle, independent of its size.

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## Square

In geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, or (100-gradian angles or right angles). It can also be defined as a rectangle in which two adjacent sides have equal length. A square with vertices ABCD would be denoted.

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## Squeeze mapping

In linear algebra, a squeeze mapping is a type of linear map that preserves Euclidean area of regions in the Cartesian plane, but is not a rotation or shear mapping.

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## Standard-definition television

Standard-definition television (SDTV or SD) is a television system which uses a resolution that is not considered to be either high- or enhanced-definition.

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## Tire code

Automobile tires are described by an alphanumeric tire code (in American English and Canadian English) or tyre code (in British English, Australian English and others), which is generally molded (or moulded) into the sidewall of the tire.

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## Video Graphics Array

Video Graphics Array (VGA) is the display hardware first introduced with the IBM PS/2 line of computers in 1987, following CGA and EGA introduced in earlier IBM personal computers.

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## Web banner

A web banner or banner ad is a form of advertising on the World Wide Web delivered by an ad server.

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## Widescreen

Widescreen images are images that are displayed within a set of aspect ratios (relationship of image width to height) that is used in film, television and computer screens.

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## 135 film

135 is photographic film in a film format used for still photography.

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## 16 mm film

16 mm film is a historically popular and economical gauge of film.

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## 16:10

16:10 is an aspect ratio mostly used for computer displays and tablet computers.

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## 21:9 aspect ratio

21:9 (2.:1) is the approximated screen aspect ratio of the true value 64:27 (2.:1) in comparison to the common ratio of 16:9 (1.:1).

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