Question

Which of the following is called the Prime Meridian?

• A. $0^{\circ }$ longitude
• B. ${90}^{\circ }$ longitude
• C. ${120}^{\circ }$ longitude
• D. ${150}^{\circ }$ longitude

Answer 1

The correct option is A $0^{\circ }$ longitude

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.