Question

Write a short easy note on prime meridian
In few words.

Answer 1

Answer:

A prime meridian is the meridian in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian form a great circle. This great circle divides a spheroid into two hemispheres.

Explanation:

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Answer 2

Answer:

A prime meridian is ultimately arbitrary, unlike an equator, which is determined by the axis of rotation. For earth's prime meridian, various conventions have been used or advocated in different region throught history