Question

Explain the difference between a undefined term and defined term
In geometry

Answer 1

The difference between defined and undefined terms is that the defined terms can be combined with each other and with undefined terms to define still more terms.These are undefined terms:1.plane 2.point 3.line.
These are defined terms:1.ray 2.union of sets 3.space 4.subset 5.set 6.proper subset 7.opposite