![]() Use in mathematics, statistics, and science This notation only applies to duration, and is seldom used for durations longer than 60 minutes. ![]() Primes are sometimes used to indicate minutes, and double primes to indicate seconds of time, as in the John Cage composition 4′33″ (spoken as "four thirty-three"), a composition that lasts exactly 4 minutes 33 seconds. In historical astronomical works, the triple prime was used to denote " thirds" ( 1⁄ 60 of an arcsecond) and a quadruple prime ⁗ " fourths" ( 1⁄ 60 of a third of arc), but modern usage has replaced this with decimal fractions of an arcsecond. As an angular measurement, 3° 5′ 30″ means 3 degrees, 5 arcminutes and 30 arcseconds. The prime symbol ′ is used for arcminutes ( 1⁄ 60 of a degree), and the double prime ″ for arcseconds ( 1⁄ 60 of an arcminute). The triple prime ‴ as used in watchmaking represents a ligne ( 1⁄ 12 of a French inch or pouce, about 2.26 millimetres or 0.089 inches). The prime symbol ′ is commonly used to represent feet (ft), and the double prime ″ is used to represent inches (in). See also: Positional notation § Sexagesimal system
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |