2. Give a definition for each of the following terms. Are there other terms that need to be defined first? What are they, and how might you define them?
(i) parallel lines
Yes, there are other terms that are needed to be defined first which are:
Plane: A plane is a flat surface on which geometric figures are drawn.
Point: A point is a dimensionless dot which is drawn on a plane surface.
Line: A line is the collection of n number of points which can extend in both the directions and has only one dimension.
i) Parallel line:-
If the perpendicular distance between two lines is always constant and they never intersect with each other in a plane. Then, two lines are called parallel lines.