Answer: line
Step-by-step explanation:
There are three undefined terms in Geometry that are used to define other terms.
i) A point (no dimension) ii) A line (one dimension) iii) A plane (two dimension)
An infinite set of points that has length but not width must n=be one dimensional and i.e. a line .
A line is described as an infinite set of points that has length but not width.
[A point has no length or width and a plane has both length and width]
