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Only 3 lines? (Posted on 2005-07-14) Difficulty: 2 of 5
It is well-known the solution to the problem of connecting nine dots, arranged in three rows of 3 dots, with four straight lines, without lifting up the pencil from the paper where they are drawn, and without any tricks at all, like folding the paper, etc...
           o        o        o


           o        o        o


           o        o        o
The question is: given the nine dots above, is it possible to connect them with only 3 straight lines ? The restrictions are the same, that is, without lifting up the pencil from the paper where they are drawn, no tricks allowed, and if you retrace a line, you must count one more line.

Prove your answer!

Note: this is a revisit to the problem Nine Dots already posted in this site and you can use that drawing for reference.

See The Solution Submitted by pcbouhid    
Rating: 2.3333 (3 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re(2): To all... | Comment 11 of 12 |
(In reply to re: To all... by Sam)

No, Sam, the solution I intended was first posted by Bob Smith.

I just put that comment to explain the "official" solution, or why "no mathematical" dots.

You can rest now.


  Posted by pcbouhid on 2005-07-15 23:03:44
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