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Step-by-step guide:1. Have participants draw irregular polygons and fill in a similar chart. This time put the results on the overhead. Use the table on the opposite page for an overhead. Possible Problems and
Concerns:It may be very surprising to see that it makes no difference if the polygon is concave. Indeed, the mathematician on the algebra team that wrote these materials at first believed that it would make a difference. http://www.mste.uiuc.edu/m2t2/algebra/regs.gsp is a Geometer's Sketchpad file of regular polygons. Resources for this unit are available at http://www.mste.uiuc.edu/m2t2/algebra/ |

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