http://www.shodor.org/interactivate/activities/tessellate
http://www.tessellations.org/tessellation-applet.htm
http://www.coolmath.com/tesspag1.htm
http://aleph0.clarku.edu/~djoyce/poincare/poincare.html
http://euler.slu.edu/escher/index.php/Hyperbolic_Geometry
Hey great links
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