Definizione monolingua

radian

radian (infinitive radiar)

1. Second-person plural (ustedes) present indicative form of radiar.
2. Third-person plural (ellos, ellas, also used with ustedes^?) present indicative form of radiar.

Wikipedia radian (plural radians)

1. (geometry) In the International System of Units, the derived unit of plane angular measure of angle equal to the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle. Symbol: rad

Definizione dizionario radian

	radiante
	A unit of plane angle with symbol "rad".

Altri significati:

unit

(geometry) In the International System of Units, the derived unit of plane angular measure of angle equal to the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle. Symbol: rad

The angle between two radii of a circle such that the length of the arc between them is equal to the radius. The circumference of a circle is equal to 2p times the radius, so one radian contains 360/(2p) = 180/p = approximately 57.2958 degrees. Conversely, multiplying the number of degrees by p/180 gives the number of radians; 360 degrees equals 2p radians.