Respuesta :
Ray is a part of the line having one end point.
Angle is formed by the intersection of two lines .
A line segment is a part of the line having two end points.
But we cant define a plane .
So as we see that, ray, angle and line segment are defined but plane is not .
So the correct option is the third option .
Answer:- All of the given options are defined terms except plane.
Explanation :-
There are only three undefined terms in geometry :-
1) point 2) line 3) plane
The given options are ray, angle, plane and segment.
Thus the third option is the only undefined term i.e. plane .
Therefore, all of the given options are defined terms except plane.