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Huh, Young-Uk – MATYC Journal, 1980
The derivation of a formula relating areas of triangles formed by cutting the corner of a cube is given. (MK)
Descriptors: Geometric Concepts, Geometry, Mathematical Formulas, Mathematics Education
Peer reviewedPedersen, Jean J. – Two-Year College Mathematics Journal, 1980
A question posed by Euler is considered: How can polyhedra be classified so that the results is in some way analogous to the simple classification of polygons according to the number of their sides? (MK)
Descriptors: Classification, Geometric Concepts, Higher Education, Mathematics Education
Download full textChazan, Daniel – 1988
Previous work has identified four areas of difficulty that students seem to have with the topic of similarity: (1) understanding the definition of similarity; (2) proportional reasoning; (3) dimensional growth relationships; and (4) correspondences in right triangle similarity. This paper reports the results of an investigation into high school…
Descriptors: Computer Assisted Instruction, Computer Oriented Programs, Geometric Concepts, Geometric Constructions
