Respuesta :
Answer:
Last choice is correct.
Step-by-step explanation:
In geometry, an undefined term is an primitive object that defines the rest of the objects in geometry. These undefined terms are: line, point and plane. Other elements are defined by these three.
Therefore, the right choice is the last option: A line extends both directs between point X and point Y; basically, because a line is graphed with an arrow at each extend, referring to the infinte extension of the line.