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Peer reviewedCraine, Timothy V.; Rubenstein, Rheta N. – Mathematics Teacher, 1993
Presents the hierarchical structure of quadrilaterals as an illustration of learning a geometric concept by moving from the levels of visualization and analysis to the level of formal deduction. The development discusses the classification of quadrilaterals, the inheritance of properties within the hierarchy, connections between algebra and…
Descriptors: Analytic Geometry, Classification, Cognitive Processes, Concept Formation
