The reference or primary line of longitude is:
A) the Tropic of Cancer.
B) the Tropic of Capricorn.
C) the Greenwich meridian.
D) the equator.
E) the International Date Line.

Question

Quizplus · Accepted Answer

The Greenwich meridian (also known as the Prime Meridian) is the reference or primary line of longitude, from which all other lines of longitude are measured. It is the line of longitude that passes through the Royal Observatory in Greenwich, London, and has been internationally recognized as the starting point for measuring longitude since 1884.

The Reference or Primary Line of Longitude Is