Answer: line
Explanation:
The three undefined terms in geometry are :-
1) point [no dimension]
2) line [one dimension]
3) plane [two dimension]
In the given figure the arrow has only length and no thickness, so it is one dimensional.
Hence, the be undefined term that best defines the arrow pictured is "A line has one dimension because it is made up of all points that extend infinitely in either direction.'
- A line is a straight one-dimensional geometric undefined shape . It has only length . It extends infinitely in both directions.