="Mike Stay" <metaweta@gmail.com> The mistake is leaving out the condition that the larger figure be similar to the smaller one. Seven hexagons are not similar to one, but seven Franceflakes are similar to one.
=David Makin <makinmagic@tiscali.co.uk> Surely some mistake - the fractal version also works with hexagons ? i.e. with something of unit boundary dimension. Or am I going insane ?
Sufficient, but not necessary. I suffered similar confusion (but then...) In order to be Certifiable for Classroom Use, along with the link, the text might say something like "tripling the boundary *while preserving the shape* of a 2-dimensional figure". And label the diagrams "Triangle", "Square" and "Franceflake" (except you can't seem to goog on the later, tsk tsk).