Finish Case 1 of the proof we did today (2/4/05) in class for Problem II
from last HW. (We finished Case 2, but not Case 1.)
Prove that if point C is on ray AB, then point B is on ray AC.
(Finishing Case 4 of the solution handed out today in class for Problem I
from last HW would be involved and very time consuming. So, instead,
just do the following problem:) Prove that if A*B*C, then segment AB is a
subset of segment AC.