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Radian (Noun)

Meaning

The unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees).

Classification

Nouns denoting quantities and units of measure.

Examples

  • The radian is a unit of angular measurement that is widely used in mathematics and physics.
  • One radian is the angle subtended at the center of a circle by an arc equal in length to the radius of the circle.
  • The angle of a sector of a circle is often measured in radians, rather than degrees.
  • To convert degrees to radians, you can multiply the angle in degrees by pi and divide by 180.
  • In calculus, the radian is the standard unit of angular measurement, and is used to define the trigonometric functions.

Synonyms

  • Rad
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