import { Measure } from "../measure/numberMeasure" ; import { radians } from "./base" ; import { PlaneAngle } from "./quantities" ; export const piRadians = Measure . of ( Math . PI , radians , "pi rad" ) ; export const tauRadians = Measure . of ( 2 , piRadians , "tau rad" ) ; export const degrees = Measure . of ( 1 / 180 , piRadians , "deg" ) ; export const arcMinutes = Measure . of ( 1 / 60 , degrees , "arcmin" ) ; export const arcSeconds = Measure . of ( 1 / 60 , arcMinutes , "arcsec" ) ;