His displacement is 4 km. The length of the route that he takes to get there is not relevant in measuring his displacement.
The Prime Meridian.
At the starting point and whenever you return to the starting point.
A displacement of 4 km from the starting point.
A displacement of 4 km from the starting point.
the prime meridian is the starting point when measuring the longitude
The starting point would be the equator. Lines of latitude run parallel to the equator.
reference point
the equator
For Latitude, the Equator is the zero point. For Longitude, the Prime Meridian at Greenwich UK, is the starting point of zero.
The car starting point
The car starting point
When measuring one point to another point you are measuring distance.
The Prime Meridian - in Greenwich, England - is where the starting point for measuring longitude is.
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A national census designed to determine it.
The Prime Meridian (long) The Equator (lat)