File talk:Congruencies-Labelled.svg
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Question over License[edit]
I regard this triangle counting puzzle image as being of similar status to the nine dots puzzle on the right. In that case the puzzle is a well known puzzle. The nine dots puzzle is not 'too simple' to be PD-ineligible. It would be hard to prove that the nine dots puzzle is old enough to merit PD-Old. I think exactly the same applies to this triangle puzzle here.
I redrew the image in Inkscape from memory. I do not have a copy, e.g. from a puzzle book, to refer to. JamesCrook (talk) 20:58, 20 October 2010 (UTC)
