178 (one hundred
ndseventy-eight) is the
natural number
In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country").
Numbers used for counting are called '' cardinal ...
following
177
Year 177 ( CLXXVII) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Commodus and Plautius (or, less frequently, year 930 ''Ab urbe co ...
and preceding
179
Year 179 (Roman numerals, CLXXIX) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Aurelius and Veru (or, less frequently, year 932 ' ...
.
In mathematics
There are 178
biconnected graph
In graph theory, a biconnected graph is a connected and "nonseparable" graph, meaning that if any one vertex were to be removed, the graph will remain connected. Therefore a biconnected graph has no articulation vertices.
The property of being ...
s with six vertices, among which one is designated as the root and the rest are unlabeled. There are also 178
median graph
In graph theory, a division of mathematics, a median graph is an undirected graph in which every three vertices ''a'', ''b'', and ''c'' have a unique ''median'': a vertex ''m''(''a'',''b'',''c'') that belongs to shortest paths between each pai ...
s on nine vertices.
178 is one of the indexes of the smallest triple of
dodecahedral number A dodecahedral number is a figurate number that represents a dodecahedron. The ''n''th dodecahedral number is given by the formula
=
The first such numbers are 0, 1, 20, 84, 220, 455, 816, 1330, 2024, 2925, 4060, 5456, 7140, 9139, 11480, … .
Hi ...
s where one is the sum of the other two: the sum of the 46th and the 178th dodecahedral numbers is the 179th.
See also
* The year
178 AD or
178 BC
*
List of highways numbered 178
The following highways are numbered 178:
Canada
*Prince Edward Island Route 178
Japan
* Japan National Route 178
United States
* Interstate 178 (former proposal)
* U.S. Route 178
* Alabama State Route 178
* Arkansas Highway 178
* California ...
*
References
{{DEFAULTSORT:178 (Number)
Integers