The time meridian is each standard time zone roughly centered on a line of longitude exactly divisible by 15 degrees and the prime meridian is the starting point for the standard time zones an arbitrary longitude line.
Longitude
The line of longitude for a place that is halfway between the prime meridian and the 80th line of longitude and west of the prime meridian would be -40 degrees longitude. The prime meridian is at 0 degrees, and halfway between 0 and 80 is 40 degrees. Since the location is west of the prime meridian, the longitude would be measured as negative.
the difference from the prime meridian
This is called the Prime meridian, it passes through Greenwich, England.
The Midnight Meridian refers to the line of longitude directly opposite the Prime Meridian, marking the halfway point between the International Date Line and the Prime Meridian. It is where each calendar day begins.
differences between equator and prime meridian
Prime Meridien is also called Greenwich Meridien. They are not different.
differences between equator and prime meridian
Nominally 180° of longitude, or halfway around the Earth.
Longitude
the difference from the prime meridian
The line of longitude for a place that is halfway between the prime meridian and the 80th line of longitude and west of the prime meridian would be -40 degrees longitude. The prime meridian is at 0 degrees, and halfway between 0 and 80 is 40 degrees. Since the location is west of the prime meridian, the longitude would be measured as negative.
The Prime Meridian is 1/2 of the boundary between the eastern and western hemispheres.
the difference from the prime meridian
This is called the Prime meridian, it passes through Greenwich, England.
35 degrees
The Midnight Meridian refers to the line of longitude directly opposite the Prime Meridian, marking the halfway point between the International Date Line and the Prime Meridian. It is where each calendar day begins.