Where do all lines of longitude meet?

All lines of longitude converge at the North and South Poles. Longitude lines, which run from the North Pole to the South Pole, are used to represent degrees of east or west from the Prime Meridian, which is at 0 degrees longitude. As these lines extend toward the poles, they come closer together until they meet at a single point at each pole. This convergence is a fundamental concept in understanding how the Earth's coordinate system is organized, particularly in navigation and mapping.

In contrast, the equator is a circle of latitude and does not relate to the convergence of longitude lines. The Prime Meridian, while significant as a reference point for longitudes, does not represent a point of convergence either; it merely serves as the starting point from which longitude is measured. The International Date Line is another reference point for determining time zones and marks where the date changes but does not pertain to the meeting of longitude lines. Thus, the North and South Poles are the only locations where all lines of longitude intersect.