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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: ( You must be logged in to post comments.)
  Subject Author Date
solutionjess2005-07-19 22:48:21
re(2): To all...pcbouhid2005-07-15 23:03:44
re: To all...Sam2005-07-15 22:42:34
To all...pcbouhid2005-07-15 18:05:06
Some Thoughtsre: Another wayBob Smith2005-07-15 14:10:04
Solutionre: another trickbrianjn2005-07-15 08:19:02
re: SolutionRichard2005-07-15 02:51:47
SolutionBrian Smith2005-07-15 01:23:15
another trickLarry2005-07-15 01:22:51
Another wayRichard2005-07-14 20:45:56
Solutionre: One way -- some numbersCharlie2005-07-14 19:08:24
SolutionOne wayBob Smith2005-07-14 17:25:46
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