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Recent Progress in Dynamic Geometry
http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/45456
title: Recent Progress in Dynamic GeometryConnecting Dynamic Geometry and Analytic Geometry
http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/45455
title: Connecting Dynamic Geometry and Analytic GeometrySome Unmotivated Cabri 3D Constructions
http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/45454
title: Some Unmotivated Cabri 3D ConstructionsFamous Curves and Their Tangents
http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/45453
title: Famous Curves and Their Tangents abstract: The MacTutor History of Mathematics archive (http://www-history.mcs.st-and.ac.uk/history/) contains an interesting section devoted to “famous curves”, many of which were studied before the publication of René Descartes' La Géométrie. The development of mathematics has since linked Algebra and Geometry so strongly that plane curves are introduced nowadays not in terms of their geometric shapes but the equations instead. In this study we shall demonstrate how some of the interesting famous curves, along with their tangents, can be constructed synthetically. According to our method, the appropriate algebraic formulation of the curves is chosen. The steps of the construction are then designed based on the analytic process. Finally Cabri Geometry is used to visualize the interpretation of algebraic formulae. The construction has the advantage that
1) it is exact;
2) no infinite process is involved;
3) nothing is hidden.
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