Question

how Longitudes are marked on the earth surface​

Answer 1

Answer:

Longitude is given as an angular measurement ranging from 0° at the Prime Meridian to +180° eastward and −180° westward. ... A specific longitude may then be combined with a specific latitude (usually positive in the northern hemisphere) to give a precise position on the Earth's surface

Explanation:

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Answer 2

Answer:

Longitude is given as an angular measurements ranging from 0° at the Prime Mardian to +180° eastern and -180° western .

A specific longitude may then be combined with a specific latitude ( usually positive in northern hemisphere ) to give a presise position on Earth's surface