A Special Theorem: Part 2 (V4)
Interact with the applet below for a few minutes.  Then answer the questions that follow.  
Be sure to alter the locations of points A, B, and C each time before (and even after) you re-slide the slider! 
Questions:
1) How would you describe the blue line p with respect to the segment with endpoints A and B?
    What exactly is line p?  
2) Notice how point C always stays on line p.  What can you conclude about the distances AC and BC?
3) Formally prove, (in the format of a 2-column proof, paragraph proof, or coordinate-geometry proof), that
    your conclusion for (2) is true for any point C that lies on line p.