The lines joining the two poles are longitudes.
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A line segment (sometimes just a segment) is two endpoints and all the points on a line between them.
The subset of a line that contains two end points is a line segment.A line segment. The point directly between them is the midpoint.lineA (part of a) line that has two endpoints is called a line segment. (If there are no endpoints, it is just called a line.)
an arc
ehat describes how much a line rises or falls between any two on that line
It is a line segment