Question

defining terms based on unde
three undefined terms in mathematics:
i. point
ii. line
iii. plane
the mathematical term line - segment explicitly uses the undefined term(s)

Explanation:

A line - segment is part of a line. A line is an undefined term in mathematics. A point is used to define the endpoints of a line - segment. A plane is not directly involved in the definition of a line - segment.

Answer:

I and II