Reconstruct a diagram where 10 straight lines, of finite length, form 12 intersections, viz:

----------------------
Intersections      by
   formed        Lines
    7              2
    4              3
    1              4
----------------------

Describe this relatively simple arrangement.

If you had two lines in the shape of a cross, would you consider that one intersection of 2 lines or of 4 lines?

Posted by Larry on 2013-12-13 18:22:46