All places on Earth west from Prime Meridian to 180 degree are in the western hemisphere.
The anti-meridian opposite the prime meridian
The eastern hemisphere includes 180° of longitude from the Prime Meridian (0°) to the 180° meridian. It encompasses areas such as Europe, Africa, Asia, and Australia.
180 degree meridian is the meridiam ospposite to the Prime Meridean or The Greenwich Meridian. It helps to find the location of a place. The 180 degree west and the 180 degree east are the same meridians. Whereas, the International Date Line or the IDL is an imaginary line that runs ALONG the 180 degree meridian. It bend slightly to avoid land. If a person travells eastward of it , he /she gains a day, but if a person travells westward of it he/she loses a day.
In the Western Hemisphere.
eastern hemisphers
The 180 meridian crosses Vanua Levu, Rambi, and Taveuni islands in Fiji.
The eastern and western ones are.
90 degrees west
Longitude is labeled from zero (at the Prime Meridian) to 180 degreesin each direction, east and west, from it.
90 degrees west
The 0° meridian runs through England - roughly through Greenwich. On the opposite side of the Earth is the 180° meridian - which is about as far from England as you can get. The closest the 180° meridian runs to anything related to England is when it passes a bit east of New Zealand, which is part of the Commonwealth of Nations (Formerly British Commonwealth) which includes England.