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)
Used in a Sentence
radian
How to use radian in a sentence. Example sentences and definitions for radian.
Editorial note
How many radians are in a quarter arc of the circle with area 2?
Examples6
Definitions1
Parts of speech1
Quick take
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)
Meaning at a glance
The clearest senses and uses of radian gathered in one view.
Definitions
Core meanings and parts of speech for radian.
noun
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)
See also: rad
Example sentences
How many radians are in a quarter arc of the circle with area 2?
Pi is the right unit because it represents the largest irreducible radian size.
My intuition is better for degrees here, but I think that would change if I spent ten minutes doing calculations involving real radian measures.
Of course radians expressed in decimal are user-unfriendly, but radians expressed in decimal are no less "actual" than radians expressed as fractions of or .
> I knew how to calculate with radians, but never understood their basis until viewing this animation, despite asking people on a number of occasions what the benefits were vs. degrees.
Proper noun examples
It wasn't a guarded secret... "Radian" is almost the same word as "radius", and 2pi * radius = circumference = 2pi radians.
Frequently asked questions
Short answers drawn from the clearest meanings and examples for this word.
How do you use radian in a sentence?
How many radians are in a quarter arc of the circle with area 2?
What does radian mean?
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)
What part of speech is radian?
radian is commonly used as noun.