2.+Plane+Geometry+-+Teachers

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Textbook Commentary
//The following comments are personal views of contributors and do not reflect the views of our employers.//
 * Grove is very weak on the ideas of proof and reasoning.
 * Jones & Couchman has a nice description of the process on pp 74-75; and geometric proof layout on p83/85. Top quality explorations of areas of special quadrilaterals (Ex 6.8 - 6.9)

Student Activities

 * Experiment with and test congruency ideas using the NLVM Congruent Triangle app - the example that ASS is //not// a congruency proof is particularly powerful.
 * Construct different quadrilaterals using GeoGebra to explore their properties.