<center>![](https://images.ecency.com/DQmP6PGKAP26RFenQggRvpBQF9CzA5FDg2HHCHeCkUNaCf5/9_dots.jpg)</center>

**You may have seen this puzzle where you have to connect 9 dots with 4 straight lines without lifting the pen from the paper or going back on yourself — it’s a traditional ‘thinking outside the box’ puzzle.**

If you can do the 4-line solution, you may be interested in trying the *9 dots, 3 lines* version that I posted last Wednesday.

This week's challenge is to connect 9 dots with 1 line!

Next week's puzzle will be to connect 16 dots with 6 lines.
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This puzzle is part of my collection of icebreakers, exercises and puzzles which can be found on [LearningPages.org](https://learningpages.org/icebreakers)

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### Solution

The 1-line solution shown below involves placing the dots on the surface of the earth with a single line going around the planet three times!

<center>![](https://images.ecency.com/DQmfBVTNkATAu9ET49cYprw4rN2PdeCv2enBW9yuaY275ge/9_dots_1_line.jpg)</center>

If you object to this solution, the alternative is to use one very thick line.