Figure 2: Three Conics
 
Figure 2: Three Conics

Three conics Q(D), Q(E) and Q(F) are shown. The conic Q(F) is the one that appears to come closest to the points D and E. In the dynamic figure, Q(F) is the one conic of these three that does not move as a function of F. The other two conics, Q(D) and Q(E) move as a function of F.

The three conics all meet at two points T1 and T2 on the line L1. Here both T1 and T2 are labeled simply by T.


The Cabri Geometry II source code is available for all figures used in this paper, as well as demonstration versions of Cabri Geometry II for Windows and Macintosh operating systems.
© 1997, 1999, Leroy J. Dickey