Three Disks


Lay three different size circular disks on a flat surface. Draw tangent pairs between all disks, six tangents in all. See diagram. Each tangent pair meets at a point, three intersections in all.


Why are the three intersection points on a line?
(No need to write down any equations)


If you are unsure of your answer you can request confirmation by emailing me at the address shown here. Please state which problem you need confirmation on clearly. Please do not email me simply for answers, the enjoyment derived from a puzzle is proportional to the time spent on it.

Return to the puzzle page index
Return to my "front" page