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Sum of Interior Angles of Polygons: A general Formula, and other updates
Posted:
Feb 1, 2011 5:39 AM


Just to announce for those interested that my homepage at http://mysite.mweb.co.za/residents/profmd/homepage4.html has been updated with the following new items: 1) PME (1989) paper "A comparative study of two Van Hiele testing instruments" 2) Feb 2011, Math eNewsletter with info regarding new books, websites, conferences, etc. 3) mathematical/mathematics education quote 4) mathematics/science cartoon My dynamic geometry sketches Link at http://math.kennesaw.edu/~mdevilli/JavaGSPLinks.htm has been updated with the following (new & revised) sketches: 1) De Villiers points & Hyperbola of a triangle (updated) 2) A generalization of Neuberg & Simson line (updated) 3) Interior Angle Sum of Polygons: A general formula to include crossed ones (new) 4) Some unproved conjectures (updated) and the Student Explorations section with: 1) Cyclic quadrilateral rectangle result (new) 2) Interior Angle Sum of Polygons: A general formula to include crossed ones (new), with introductory Logo (Turtle Geometry) activity 3) Quadrilateral Inequality involving Perimeter & Diagonals (updated) 4) Added links to 'Mathematical Digest' and 'School Maths'
Message was edited by: Michael de Villiers
Message was edited by: Michael de Villiers
Message was edited by: Michael de Villiers
Message was edited by: Michael de Villiers



