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|Michael de Villiers; Mathematics Education, Univ. of Durban-Westville, South Africa|
|Articles by Villiers related to geometry and geometry education some in PDF format, including: An Extended Classification of Quadrilaterals; A Mathematical Treasure Hunt; Place Kicking Locus in Rugby; Sketchpad Solutions and Results; A Dual, and Generalizations, of a Sharp result; Overlapping Circles; Generalizing Van Aubel Using Duality; and Learners’ needs for conviction and explanation within the context of dynamic geometry. Sketchpad sketches related to some of these are also available in zip format for downloading, and can be used for demonstrations or investigations.|
|Levels:||High School (9-12)|
|Math Topics:||Euclidean Plane Geometry, Logic/Foundations|
|Math Ed Topics:||Constructivism|
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