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Peer reviewedFarrell, Ann M. – Ohio Journal of School Mathematics, 1995
Students can learn to make algebra, trigonometry, and geometry work for them by using matrices to rotate figures on the graphics screen of a graphing calculator. Includes a software program, TRNSFORM, for the TI-81 graphing calculator which can draw and rotate a triangle. (MKR)
Descriptors: Algebra, Computer Software, Geometry, Graphing Calculators
Peer reviewedSt. John, Dennis – Mathematics Teacher, 1998
Explains how to code and decode messages using Hill ciphers which combine matrix multiplication and modular arithmetic. Discusses how a graphing calculator can facilitate the matrix and modular arithmetic used in the coding and decoding procedures. (ASK)
Descriptors: Graphing Calculators, Mathematical Concepts, Mathematics Activities, Mathematics Instruction
Peer reviewedLowther, Martha H. – Mathematics Teacher, 1996
Presents cost analyses of building a patio, incorporating manipulatives, pattern building, graphing calculators, matrix applications, and functions. Includes reproducible student worksheet. (MKR)
Descriptors: Consumer Economics, Cost Effectiveness, Functions (Mathematics), Graphing Calculators
