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Peer reviewedPollak, Henry – Australian Mathematics Teacher, 1989
Possible ways of mechanization for counting using a binary system are discussed. Shows a binary representation of the numbers and geometric models having eight triples of lamps. Provides three problem sets. (YP)
Descriptors: Algorithms, Computation, Geometric Constructions, Geometry
Peer reviewedWielenberg, Peggy – Mathematics Teacher, 1990
Discusses geometric construction problems. Presents four ways to construct a regular octagon using different conditions. Provides drawings showing the constructions. (YP)
Descriptors: Geometric Concepts, Geometric Constructions, Geometry, Mathematics Materials
Peer reviewedRobinson, Philip – Mathematics in School, 1989
Analyzes fifth graders' approaches for solving the problem of the distance to the horizon. Describes determining the area bounded by the horizon. (YP)
Descriptors: Elementary School Mathematics, Geometry, Grade 5, Mathematical Applications
