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Interesting Geometry Website?

Somehow I think geometry (at least its spirit) is getting lost amongst all of the curricular adjustments, especially those that are backlashes to reform curricula. And, I am not speaking of the apparent loss of attention to the idea of proof, formal or informal. I tell my students: "Geometry is a verb, not a noun!" but the echo of my words gets lost amongst the counterclaims that at least numbers are useful but geometry is not. How sad!

The following web site can help change the situation, by providing some interesting geometrical explorations. I am not claiming that all of the suggested ideas are new, but perhaps they have been forgotten or subsumed by the quest for algorithmic proficiency.

The site was created by Ephraim Fithian, Professor Emeritus of Mathematics at Kutztown University (Kutztown, PA). Originally the web site was made available through Kutztown University, but is now offered via Ephrian's home page (THANKS!).

The site includes sixteen geometry activities, supported by explanations, illustrations, instructions for classroom use. The topics include:

  • Tangrams
  • The Golden Ratio
  • the Geoboard
  • Polygons
  • Symmetry using Miras
  • Constructions
  • Polyominoes and Polyiamonds
  • Star Polygons
  • Special Points in Polygons
  • Polygon Tessellations
  • Kaleidoscope Tessellations
  • Escher Tessellations
  • Space Cubes
  • Polyhedra
  • Symmetry in Space
  • Topological Considerations
This is only one of the many geometry sites available. I will discuss others in the future. If you have a favorite that you would like to recommend, please send it to my attention.