en.wikipedia.org/wiki/Longitude

Longitude is a geographic coordinate that specifies the east-west position of a
point on the Earth's surface. It is an angular measurement, usually expressed in
degrees and denoted by ... These ...

astro.unl.edu/naap/motion1/tc_units.html

The primary unit in which longitude and latitude are given is degrees (°). There
are 360° of longitude (180° E ↔ 180° W) and 180° of latitude (90° N ↔ 90° S).

www.geolounge.com/latitude-longitude/

Aug 25, 2014 ... The lines running north-south are known as lines of longitude. ... There are 360
degrees of latitude and the latitude line of 0 degrees is known as the Prime
Meridian ... Many mapping programs such as Google Maps use DD.

academic.brooklyn.cuny.edu/geology/leveson/core/linksa/lat_long.html

If we put both the latitude lines and the longitude lines together on the sphere, ...
Well, there's 360 degrees in a circle, so if we divide 24,901.92 miles by 360 ...

www.timeanddate.com/time/current-number-time-zones.html

If each time zone were one hour apart, there would be 24 in the world. ... At 150
degrees west (or 150° W) longitude, the time should be 150 degrees divided by ...

www.answers.com/Q/How_many_degrees_of_longitude_are_there

There are 180 degrees of longitude on both the east and west of the Prime
Meridian. They add up to 360 degrees, however, the maximum number of
degrees ...

www.reference.com/geography/many-lines-latitude-earth-9159d6cc755d062a

There are 180 lines of latitude assigned to the surface of the Earth, not ... grid
system used to map the earth consists of latitude and longitude lines. ... How
many degrees are there between the equator and the southern tip of Greenland?

www.worldatlas.com/aatlas/imageg.htm

For precision purposes, degrees of longitude and latitude have been divided into
minutes (') and seconds ("). There are 60 minutes in each degree. Each minute ...

www.quora.com/What-is-the-exact-number-of-latitudes-longitudes

Dec 25, 2015 ... The most accurate thing to say would be that they are infinite. You can subdivide
the ... You can subdivide the region between 1° N and 2° N as many times as ...
There are 360 Lines of Longitude, called “meridians”. ... This makes the total
number of latitudes 90+90+1 (including 0 degree - equator) = 181.

www.coastalnavigation.com/samples/sec_1/1_pages/1_2.htm

In theory there are an infinite number of parallels and meridians. For
convenience they are ordered into scales made up of degrees ( ° ) and fractions
of degrees.