What longitude value corresponds to the Greenwich meridian?

What longitude value corresponds to the Greenwich meridian?

• A. 90
• B. 0
• C. 180
• D. 270

Answer: (B)

Longitude measures how far east or west a point is from the Prime Meridian, the line that runs through Greenwich, England. That particular meridian is defined as 0 degrees longitude, serving as the reference starting point for all longitude measurements. Other listed values correspond to other meridians: 90 degrees would place you a quarter of the globe east or west of Greenwich, 180 degrees is the opposite side of the globe (the antipodal meridian), and 270 degrees is just another way some systems express 90 degrees west. The Greenwich meridian itself is the 0-degree line.

Longitude measures how far east or west a point is from the Prime Meridian, the line that runs through Greenwich, England. That particular meridian is defined as 0 degrees longitude, serving as the reference starting point for all longitude measurements. Other listed values correspond to other meridians: 90 degrees would place you a quarter of the globe east or west of Greenwich, 180 degrees is the opposite side of the globe (the antipodal meridian), and 270 degrees is just another way some systems express 90 degrees west. The Greenwich meridian itself is the 0-degree line.