The aspect ratio of a shape is the ratio of its longer dimension to its shorter dimension. It may be applied to two characteristic dimensions of a three-dimensional shape, such as the ratio of the longest and shortest axis, or for symmetrical objects that are described by just two measurements, such as the length and diameter of a rod. The aspect ratio of a torus is the ratio of the major axis R to the minor axis.
There are multiple types of aspect ratios which are all used for different purposes. For example:
*4:3 is used for many computer monitors and older, non-widescreen televisions.
*1:1 is an uncommon square-format aspect ratio occasionally used in photography.
*5:4 is a computer monitor resolution, now more commonly used in mobile telephone cameras.
*16:9 is the aspect ratio used for High Definition television, as well as movies.
*14:9 is a compromise aspect ratio used to create a picture acceptable to both 4:3 and 16:9 televisions.
*16:10 is utilized in the majority of widescreen computer monitors.
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