2.(iii) 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? iii) line segment
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 collection of n number of points which can extend in both the directions and has only one dimension.
iii) line segment : -
A straight line with two end points that cannot be extended further and has a definite length is called line segment