180 (one hundred eighty in American English, one hundred and eighty in British English) is the natural number following 179 and preceding 181. For other uses, see American English (disambiguation). ...
British English (BrE) is a broad term used to distinguish the forms of the English language used in the United Kingdom from forms used elsewhere. ...
179 is the natural number between 178 and 180. ...
181 is the natural number between 180 and 182. ...
List of numbers — Integers  << 180 181 182 183 184 185 186 187 188 189 >> This is a list of articles about numbers (not about numerals). ...
The integers are commonly denoted by the above symbol. ...
179 is the natural number between 178 and 180. ...
181 is the natural number between 180 and 182. ...
182 is the natural number between 181 and 183. ...
Cardinal One hundred [and] eightythree Ordinal 183rd Factorization Roman numeral CLXXXIII Binary 10110111 Hexadecimal B7 183 is the natural number following 182 and preceding 184. ...
Cardinal One hundred [and] eightyfour Ordinal 184th Factorization Roman numeral CLXXXIV Binary 10111000 Hexadecimal B8 184 is the natural number following 183 and preceding 185. ...
185 (Roman: CLXXXV) is the number equal to 37 times 5. ...
186 is the natural number following 185 and preceding 187. ...
Cardinal One hundred [and] eightyseven Ordinal 187th Factorization Roman numeral CLXXXVII Binary 10111011 Hexadecimal BB 187 is the natural number following 186 and preceding 188. ...
Cardinal One hundred [and] eightyeight Ordinal 188th Factorization Roman numeral CLXXXVIII Binary 10111100 Hexadecimal BC 188 is the natural number following 187 and preceding 189. ...
Cardinal One hundred [and] eightynine Ordinal 189th Factorization Roman numeral CLXXXIX Binary 10111101 Hexadecimal BD 189 is the natural number following 188 and preceding 190. ...
190 is the natural number following one hundred eightynine and preceding one hundred ninetyone. ...
  Cardinal  One hundred [and] eighty  Ordinal  180th  Factorization   Roman numeral  CLXXX  Binary  10110100  Duodecimal  130  Hexadecimal  B4  Vigesimal  90  Aleph0, the smallest infinite cardinal In mathematics, cardinal numbers, or cardinals for short, are a generalized kind of number used to denote the size of a set. ...
Commonly, ordinal numbers, or ordinals for short, are numbers used to denote the position in an ordered sequence: first, second, third, fourth, etc. ...
In mathematics, factorization or factoring is the decomposition of an object (for example, a number, a polynomial, or a matrix) into a product of other objects, or factors, which when multiplied together give the original. ...
The system of Roman numerals is a numeral system originating in ancient Rome, and was adapted from Etruscan numerals. ...
The binary numeral system, or base2 number system, is a numeral system that represents numeric values using two symbols, usually 0 and 1. ...
The duodecimal (also known as base12 or dozenal) system is a numeral system using twelve as its base. ...
In mathematics and computer science, hexadecimal, base16, or simply hex, is a numeral system with a radix, or base, of 16, usually written using the symbols 0â€“9 and Aâ€“F, or aâ€“f. ...
The vigesimal or base20 numeral system is based on twenty (in the same way in which the ordinary decimal numeral system is based on ten). ...
In mathematics
One hundred [and] eighty is the sum of six consecutive primes (19 + 23 + 29 + 31 + 37 + 41), as well as the sum of eight consecutive primes (11 + 13 + 17 + 19 + 23 + 29 + 31 + 37). The sum of Euler's totient function φ(x) over the first twentyfour integers is 180. Since 180 is divisible by the total number of its divisors, it is a refactorable number. The first thousand values of Ï†(n) In number theory, the totient (n) of a positive integer n is defined to be the number of positive integers less than or equal to n and coprime to n. ...
A refactorable number or tau number is an integer n that is divisible by the count of its divisors, or to put it algebraically, n is such that . ...
Using degrees (°) to measure angles, 180° is called straight angle, and makes a semicircle. 180° is equivalent to π rads. In normal space, the interior angles of a triangle add up to 180°. A degree (in full, a degree of arc, arc degree, or arcdegree), usually symbolized Â°, is a measurement of plane angle, representing 1ï¼360 of a full rotation. ...
This article is about angles in geometry. ...
A semicircle of radius r. ...
Lowercase pi The mathematical constant Ï€ is a real number which may be defined as the ratio of a circles circumference (Greek Ï€ÎµÏÎ¹Ï†ÎÏÎµÎ¹Î±, periphery) to its diameter in Euclidean geometry, and which is in common use in mathematics, physics, and engineering. ...
Some common angles, measured in radians. ...
A triangle is one of the basic shapes of geometry: a polygon with three vertices and three sides which are straight line segments. ...
180 is a Harshad number in base 10. A Harshad number, or Niven number, is an integer that is divisible by the sum of its digits in a given number base. ...
In other fields  180° also means antipode. For example, a "180degree change" indicates a radical change.
 The maximum possible score in one turn at darts (three treble 20s).
 In astronomy, when two planets are 180 degrees apart, they are said to be in opposition. In astrology, this is an aspect that is considered to be negative in influence.
 The year AD 180 or 180 BC.
 A BMX trick where a rider rotates the bike and themselves through half a turn and lands, now rolling backwards.
