Using the Geoboard to find areaHow to Watch Keep Learning Keep Learning is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon ...
Alan F. Beardon, Geoboards, Polygons and Pick's Theorem, The Mathematical Gazette, Vol. 93, No. 527 (Jul., 2009), pp. 228-231 ...
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