## A line is an undefined term because it

A) contains an infinite number of points

B) can be used to create other geometric shapes

**C) describes something that does not have width or depth**

D) is a term that does not have a formal definition

The correct answer is statement number 3. A line is an undefined term because it describes something that does not have width or depth. However, lines can extend their length on both sides infinitely. It contains arrowheads indicating it can extend.