Greenwich is a city in England and cities with its namesake also exist in former English colonies (such as the USA and Australia). There is no Arab country that has a Greenwich city. If the question seeks to ask which Arab country has the Prime Meridian (also called the Greenwich Meridian) going through it, that would be Algeria.
grece
Tahrir Square was the scene of huge demonstrations during the "Arab Spring." Where is Tahrir Square located?
in what later became the country of lebanin
Portugal
The Adriatic Seas lies off the coast of several countries. They are Croatia, Bosnia-Herzegovina, Slovenia, Italy, Montenegro and Albania.
Algeria,North Africa
Most of the Arab World is to the east of Greenwich, England. However, parts of Algeria and all of Morocco, Western Sahara, and Mauritania are west of Greenwich, England.
Arab world is east of Greenwitch.
The Latitude of Greenwich is 51° 28' 38" North.
Madagascar
Greenwich is not a city or a country. Greenwich is a district in London, UK, known for the Greenwich Mean Time (GMT) and the Prime Meridian line.
The Prime Meridian crosses, among others, the countries of Algeria, Mali, and Burkina Faso. I'm sure the answer to the question is among those, but I'm not sure which of those is considered an 'Arab' country.
The country in the region that lies farthest to the north in the middle east is Saudi Arabia. Saudi Arabia is the largest Arab state at approximately 870,000 square miles.
Greenwich Country Day School was created in 1926.
Eritrea is not an Arab country, but an African country.
Greenwich is a district in London, England, so the country that Greenwich is in is the United Kingdom. It is known for being the location of the Prime Meridian and the Royal Observatory.
There is no Arab country that crosses the equator. Somalia is a member of the Arab League and crosses the equator, but its people are Somalis, not Arabs.