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Geometric Concepts2
Geometry2
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Plane Geometry2
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Hirstein, James J.1
Pinker, Aron1
Rachlin, Sidney L.1
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The Method of Centroids in Plane Geometry.
Peer reviewed Peer reviewed
Pinker, Aron – Mathematics Teacher, 1980
Archimedes viewed the method of centroids as a valuable tool for intuitive discoveries. This article presents several uses of this technique and discusses how the method of centroids could be used in secondary schools. (Author/MK)
Descriptors: Geometric Concepts, Geometry, Mathematics Curriculum, Mathematics Instruction
The Pythagorean Theorem on an Isometric Geoboard.
Peer reviewed Peer reviewed
Hirstein, James J.; Rachlin, Sidney L. – Mathematics Teacher, 1980
A system of area measurement developed for the isometric geoboard is used to justify some relationships that are often proved using square units of area. (Author/MK)
Descriptors: Geometric Concepts, Geometry, Manipulative Materials, Mathematics Instruction