Question

prime meridian or Greenwich meridian​

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. 

Answer 2

PRIME MERIDIAN - 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.

GREENWICH MERIDIAN - Greenwich Meridian is a imaginary line used to indicate 0° longitude that passes through Greenwich, a borough of London, and terminates at the North and South poles.

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