Classifying triangles and quadrilaterals

• Autores: Orlando B. Alonso, Joseph Malkevitch, Ruth Dover (ed. lit.), Patrick Harless (ed. lit.)
• Localización: Mathematics teacher, ISSN-e 2330-0582, ISSN 0025-5769, Vol. 106, Nº 7, 2013, págs. 541-548
• Idioma: inglés
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• Resumen

  • The classification of shapes in middle and high school geometry often seems very mysterious to students, featuring strange terms such as isosceles, trapezoids, and kites, which are defined by a mixture of parallelism and metric ideas. The activities introduce a more natural way to classify triangles and quadrilaterals.