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Direct linkMammana, Maria Flavia; Micale, Biagio; Pennisi, Mario – International Journal of Mathematical Education in Science and Technology, 2009
In this note we show the existence of a surprising analogy between quadrilaterals and tetrahedra, determining some properties that hold for both families of figures. This analogy suggests some new properties of quadrilaterals. (Contains 11 figures,)
Descriptors: Mathematics Activities, Geometry, Mathematics Instruction, Computer Software
Micale, Biagio; Pennisi, Mario – International Journal of Mathematical Education in Science and Technology, 2005
In this article quadrilaterals with concurrent maltitudes are characterized. A generalization of the maltitudes is given, and a larger family of quadrilaterals for which an analogous property of concurrency holds is determined and studied.
Descriptors: Mathematics, Geometric Concepts, Computer Software, Plane Geometry
