Into how many degrees of longitude is the earth divided?

Answer 1

360 degrees

Longitude runs from 180 degees East to -180 degrees West
all based on the Prime Meridian which runs through Greenwich England.

Longitude: http://en.wikipedia.org/wiki/Longitude
"Each degree of longitude is further sub-divided into 60 minutes, each of which divided into 60 seconds. A longitude is thus specified in sexagesimal notation as 23° 27′ 30" E. For higher precision, the seconds are specified with a decimal fraction. An alternative representation uses degrees and minutes, where parts of a minute are expressed in decimal notation with a fraction, thus: 23° 27.500′ E. Degrees may also be expressed as a decimal fraction: 23.45833° E. For calculations, the angular measure usually must be converted to radians, so longitude may also be expressed in this manner as a signed fraction of π (pi), or an unsigned fraction of 2π."

" degree of latitude, which is always around sixty nautical miles or about 111 km (69 statute miles, each of 5280 feet) (exactly 111.1334 - 0.5594 cos (2φ) + 0.0012 cos (4φ) ), a degree of longitude varies from 0 to 111 km: it is 111 km times the cosine of the latitude, when the distance is laid out on a circle of constant latitude. More precisely, one degree of longitude = (111.320 + 0.373sin²φ)cosφ km, where φ is latitude)."

Latitude: runs from 90 degrees North and 90 degrees South; because the poles are at 90 degree to the equator.

Latitude: http://en.wikipedia.org/wiki/Latitude
"Latitude is measured north and south of the prime meridian. Latitude, usually denoted symbolically by the Greek letter phi, , gives the location of a place on Earth north or south of the equator. Lines of Latitude are the horizontal lines shown running east-to-west on maps. Technically, Latitude is an angular measurement in degrees (marked with °) ranging from 0° at the Equator (low latitude) to 90° at the poles (90° N for the North Pole or 90° S for the South Pole; high latitude). The complementary angle of a latitude is called the colatitude."

Answer 2

360 degrees of longitude, divided into 180 degrees West, and 180 degrees east. The notation for this is would be something like 112(degree symbol) East. 0 Degrees e/w is known as the prime meridian, and 180 degrees e/w would be the international date line.

Answer 3

180

(There might be a better answer in your textbook.)

By the way, the next answerer is wrong. Opposite of the prime meridian is not the international date line. The international date line is not straight. The numerically highest line of longitude, 180°, is called the antimeridian.
See: http://en.wikipedia.org/wiki/Antimeridian

Answer 4

24

Answer 5

360 total, 180 East and 180 West of the Prime Meridian

Answer 6

180, split evenly between the northern & southern hemispheres.