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Radian

The radian, denoted by the symbol rad, is the unit of angle in the International System of Units (SI) and is the standard unit of angular measure used in many areas of mathematics. It is defined such that one radian is the angle subtended at the center of a plane circle by an arc that is equal in length to the radius. The unit is defined in the SI as the…

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degrees
⁠180/π⁠° ≈ 57.295779513° ≈ 57° 17′ 44.806″
gradians
⁠200/π⁠ grad ≈ 63.661977g
milliradians
1000 mrad
Symbol
rad
Unit of
angle
Unit system
SI

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Radian

Nodes85
Edges84
Triples99
Avg. degree1.98
Density0.023529
Components1

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Radian

Top relations

related to As an SI unit · 17
Radian → As Paul Quincey, CCU, CGPM, Consultative Committee, General Conference, In, In May, In October, International System, Measures, Mikhail Kalinin, Richard Nelson, SI, The, This, Units, Weights
related to Dimensional analysis · 13
Radian → Anthony French, For, Giacomo Prando, However, In SI, It, Oberhofer, One, Plane, SI, Similarly, The, When
related to Pre-20th century · 13
Radian → By, Cotes, For, Harmonia, In, Kashi, Newton, Now, Robert Smith, Roger Cotes, Smith, The, They
related to Prefixes and variants · 12
Radian → Being, Each, For, In, Metric, NATO, So, Sweden, The, There, This, USSR
related to Unit symbol · 9
Radian → Alternative, Hence, In, International Organization, Measures, Standardization, The International Bureau, Weights, When
related to Definition · 7
Radian → More, Multiplying, One, Since, The, This, Thus
related to Mathematics · 4
Radian → For, In, Results, This
related to Physics · 4
Radian → For, One, Similarly, The
is a · 3
Radian → angle subtended at the center of a plane circle by an arc that is equal in length to the radius, dimensionless unit equal to 1, measure of an angle that is subtended by an arc of a length equal to the radius of the circle
related to Between degrees · 3
Radian → As, For, Thus

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Important terminology

angle rad radians unit used si units displaystyle angular circle radius angles example arc one degrees pi measure 2π analysis

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Radiandegrees⁠180/π⁠° ≈ 57.295779513° ≈ 57° 17′ 44.806″1.00infobox
Radiangradians⁠200/π⁠ grad ≈ 63.661977g1.00infobox
Radianmilliradians1000 mrad1.00infobox
RadianSymbolrad1.00infobox
Radianturns.mw-parser-output .sfrac{white-space:nowrap}.mw-parser-output .sfrac.tion,.mw-parser-output .sfrac .tion{display:inline-block;vertical-align:-0.5em;font-size:85%;text-align:cent…1.00infobox
RadianUnit ofangle1.00infobox
RadianUnit systemSI1.00infobox
Radianis aangle subtended at the center of a plane circle by an arc that is equal in length to the radius0.90text
Radianis ameasure of an angle that is subtended by an arc of a length equal to the radius of the circle0.90text
Radianis adimensionless unit equal to 10.90text
meter per radianinstance ofis involved in derived units0.80text
Radianrelated to As an SI unitAs Paul Quincey0.60section

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