Answer:
True
Step-by-step explanation:
It is given in the question that D, E, and F are collinear points.
This is a piece of incomplete information because the point E may lie between D and F or, point E may also lie outside DF.
Therefore, the conclusion or conjecture can be made from the above incomplete information that DE + EF = DF is true provided E lies between D and F. (Answer)
Since D, E, and F are given in order, then we can assume that E lies between D and F.
