The geographic coordinate system consists of a set of east-west rings around the globe (parallel to the equator), and a set of north-south rings crossing the equator at right angles and converging at the poles. The east-west rings around the earth and parallel to the equator are knownas what?

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1. The geographic coordinate system consists of a set of east-west rings around the globe (parallel to the equator), and a set of north-south rings crossing the equator at right angles and converging at the poles. The east-west rings around the earth and parallel to the equator are knownas what?