Counting the number of pairs of circles having a common point

Revision en2, by hongjun-7, 2016-03-04 09:29:00

You can see the problem here.

Every two circles touch in at most one point (in particular no circle can be contained in a different circle).

Does anyone have some ideas about the problem?

Tags geometry

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en2 English hongjun-7 2016-03-04 09:29:00 5 Tiny change: 'ome ideas of the probl' -> 'ome ideas about the probl'
en1 English hongjun-7 2016-03-04 08:59:56 298 Initial revision (published)