It is called a circle.
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No A line segment has a beginning and an end, but a line has no beginning or end. A ray has a beginning but no end.
A line segment is a part of a line that has a specific beginning and end point. In contrast, a line is a one-dimensional geometric figure that extends infinitely in both directions without end points. Therefore, a line is the part of a line that has no beginning and end.
No. However, it does have to have a beginning number. beside the beginning number, on the actual line, you would put an arrow on the end of it, because numbers are infinite in both directions.
parallel ~ Actually, all lines are straight and endless. A ray has one endpoint, is straight, and the other end of the ray is endless. A segment has a defined beginning and end, and is straight.
A point is an undefined term. But given two points, they can be joined using a line segment.