Hi,

Since a lot of you are geometrically-inclined I thought I would share 
this: http://www.ics.uci.edu/~eppstein/junkyard/

So many different things :) A curious mind could spend hours here. There 
are even links to traditional methods, including this one for drawing 
regular pentagons using a compass and ruler: 
http://www.cut-the-knot.org/pythagoras/pentagon.shtml

I could have used that one a few times :D

Sam

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