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.

(In reply to 2nd question about terminology by Ady TZIDON)

However you choose, but a sentence or two would be sufficient.

In terms of terminology I am having some difficulty in understanding how "straight lines and intersections" can be equated with "edges and vertices",  but if you can do that then I'd like to see.

Posted by brianjn on 2013-12-14 17:02:04