Electronic Proceedings of the Twenty-sixth Annual International Conference on Technology in Collegiate Mathematics

San Antonio, Texas, March 20-23, 2014

Paper S030

This is an electronic reprint, reproduced by permission of Pearson Education Inc. Originally appeared in the Proceedings of the Twenty-sixth Annual International Conference on Technology in Collegiate Mathematics, ISBN 0113866726,Copyright (C) 2015 by Pearson Education, Inc.


Using Dual Graphics Views in Geogebra

Barbara K. D'Ambrosia


Department of Mathematics and Computer Science
John Carroll University
Cleveland, OH 44118


list of all papers by this author

Carl R. Spitznagel


Department of Mathematics and Computer Science
John Carroll University
Cleveland, OH 44118


list of all papers by this author

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ABSTRACT

One of the features that was added in Version 4 of GeoGebra is a secondary graphics view that can be dynamically linked to the primary graphics view. In this paper, we explore some of the opportunities provided by this second graphics window. Specifically, we explain how to create a zoom utility that shows students global and local views of a graph simultaneously, and a parametric equations tool that shows the graph of a parametrically defined curve together with the graphs of the component functions. We also give suggestions for worksheets that allow students to explore the relationship between Cartesian and polar graphs of the same function, and between the unit circle and the sine function.

GeoGebra is free software, distributed under the GNU General Public License. It can be run locally on multiple platforms without an internet connection, but one of its strengths is that you can create web applets and web pages that your students can use without having to download and install GeoGebra on their own computers. In addition to the GeoGebra computer software, there is now a GeoGebra app available for iOS and Android mobile devices. The mobile version of GeoGebra is currently not as rich as the computer version. In particular, the GeoGebra use described in this paper is not currently available through the mobile app. To get started with GeoGebra, visit the GeoGebra web site, at http://www.geogebra.org.

Keyword(s): GeoGebra