Instructions

These animations are constructed using GeoGebra, a free, multi-platform dynamic mathematics software that joins geometry, algebra, and calculus. The animations appear in the form of  interactive applets. A most useful feature of these applets is the availability of so-called sliders that allow the readjustment of parameter values over prescribed ranges and increments either in manual or in animated modes. Other features include: a reset icon displayed in the upper right corner; a run/pause icon located in the lower left corner. The bottom right ? button opens a separate window with brief explanations. Right click an object in order to modify its properties; in particular, the speed of an animation can be changed after accessing the 'basic properties' of the slider controlling the animation. The graphics view can be moved by using Ctrl + mouse drag or it can be zoomed using Ctrl + mouse wheel. To erase unwanted traces, press Ctrl-F pair of keys or slightly move the graphics view. Right click the applet window in order to set up tools to change the looks of the graphics screen such as grid, axes, zoom, color. Double click the applet window to open a new window of the same applet which now includes GeoGebra construction tools that can be used to examine the inner workings of the applet and to revise and modify the code in order to meet the particular requirements of the user.

Press Ctrl + or Ctrl - pair of keys to increase or decrease the size of the page on the screen. Press F11 key to establish or exit full screen.

Be patient when retrieving a GeoGebra applet from the Internet for the first time.If an applet does not start,  make sure that Java 1.6 is installed and active in your web browser; click 柤 to install Java. To open a new blank GeoGebra applet in your browser,  click 桑.

The copyright symbol © at the bottom of a page is shown to serve as a reminder that, while the user is definitely encouraged to adopt, adapt, and disseminate the applets in this collection, the author would still appreciate getting  some credit, however brief, for the work presented; he would also be delighted to receive any comments or suggestions for improving, modifying, or correcting these applets -thank you. (Email address:  riaz@umn.edu )