Geography Examples of Great Circles Log in to track progress The equator – O° Latitude. The Greenwich meridian— O° Longitude. Longitude 1 80°W and 1 80°E Longitude 1 50°E and 30°W Longitude 90°E & 90°W ← Previous Meaning of Great Circle Next → Longitude and Time Leave a comment Cancel replyYou must be logged in to post a comment.