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An Analogy of the Pythagorean Theorem.
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
The Challenge of Classifying Polyhedra.
Peer reviewed Peer reviewed
Pedersen, 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