What are important lines of longtitude(name them)?

Question

well what i know is 0 is greenwich meridian and 180 is prime meridian. Is this right and am i missing anything important out?

Answer 1

Those two are the only two that have names as well as numbers     Prime Meridian 0 degrees      

                    International date line 180 degrees

                  

(you have 180 incorrectly named!)

Answer 2

Time zones generally are every 15 degrees longitude.

Answer 3

all i know is the prime meridian and the IDL

Answer 4

Get extra points

Unlike latitude, which has the equator as a natural starting position, there is no natural starting position for longitude. Therefore, a reference meridian had to be chosen. While British cartographers had long used the Greenwich meridian in London, other references were used elsewhere, including: El Hierro, Rome, Copenhagen, Jerusalem, Saint Petersburg, Pisa, Paris, Philadelphia, and Washington. In 1884, the International Meridian Conference adopted the Greenwich meridian as the universal prime meridian or zero point of longitude.