Concept information
Preferred term
0112/2///62720#UAA966Radiant
Definition
- The radian is the standard unit of angular measure, used in many areas of mathematics. It describes the plane angle subtended by a circular arc as the length of the arc divided by the radius of the arc. In the absence of any symbol radians are assumed, and when degrees are meant the symbol $^{\\ circ}$ is used.
Broader concept
- Angle (en)
Narrower concepts
- D61 ArcMinute (en)
- D62 ArcSecond (en)
- DD Degree (en)
- A91 Gon (en)
- grad Grad (en)
- B97 microradian (en)
- mil{NATO} Mil Angle (NATO) (en)
- m'' Milli ArcSecond (en)
- C25 milliradian (en)
- D61 Minute Angle (en)
- M44 Revolution (en)
Note
- The radian and steradian are special names for the number one that may be used to convey information about the quantity concerned. In practice the symbols rad and sr are used where appropriate, but the symbol for the derived unit one is generally omitted in specifying the values of dimensionless quantities.
- The radian is the standard unit of angular measure, used in many areas of mathematics. It describes the plane angle subtended by a circular arc as the length of the arc divided by the radius of the arc. The unit was formerly a SI supplementary unit, but this category was abolished in 1995 and the radian is now considered a SI derived unit. The SI unit of solid angle measurement is the steradian. The radian is represented by the symbol "rad" or, more rarely, by the superscript c (for "circular measure"). For example, an angle of 1.2 radians would be written as "1.2 rad" or "1.2c" (the second symbol is often mistaken for a degree: "1.2u00b0"). As the ratio of two lengths, the radian is a "pure number" that needs no unit symbol, and in mathematical writing the symbol "rad" is almost always omitted. In the absence of any symbol radians are assumed, and when degrees are meant the symbol u00b0 is used. [Wikipedia]
Notation
- 0112/2///62720#UAA966
- C81
- rad
In other languages
-
راديان
Arabic
-
радиан
Bulgarian
-
弧度
Chinese
-
radián
Czech
-
English
-
French
-
ακτίνιο
Greek
-
רדיאן
Hebrew
-
वर्ग मीटर
Hindi
-
radián
Hungarian
-
Italian
-
ラジアン
Japanese
-
radian
Latin
-
radian
Malay
-
رادیان
Persian
-
radian
Polish
-
radiano
Portuguese
-
radian
Romanian
-
радиан
Russian
-
radian
Slovenian
-
Spanish
-
radyan
Turkish
URI
https://vocab.sentier.dev/units/unit/RAD
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