Cabri Geometry II Activity
1. Put the software CD in your computer. For a Windows system select Start
icon, choose Run, select your CD_ROM drive and double click on
TICD.exe. For a Macintosh double click on the TICD.exe icon on your
desktop. Choose the software option from the menu and install the
program. Because this is a demo program you will be limited to 15 minute
sessions, but you can restart the program as many times as needed.
2. Point to each menu option (menu bar and tool bars) and hold down the
mouse button then read the submenu options to get an overview of the
available options. An alternative would be to look through the list of menu
options at the end of the “Getting Started With Cabri Geometry” guidebook
http://education.ti.com/product/software/cabri/guide/cabriguideus.html
Note: This program does not have a standard Window’s interface.
You must hold the mouse button down and move to the menu option
before releasing the button.
3. From the Lines menu option (second after the pointer icon) select triangle.
Click on three non-collinear locations in the work area to create a triangle
on the screen. Point to a vertex, hold the mouse button down, and drag
the point. Observe how the triangle will be redrawn as you move the point.
4. From the Display menu option (ninth after the pointer icon) select Mark
Angle. Click on the three vertices of the triangle. The second vertex
selected will be the vertex of the marked angle.
5. From the Measure menu option (eighth after the pointer icon) select angle.
Select the marked angle by moving the mouse cursor to the vertex of the
angle and clicking the button when the message “this angle” is displayed.
Click on the pointer icon and again drag a vertex. Observe the effect it
has on the angle measure.
6. From the Construct menu option (fourth after the pointer icon) select
perpendicular. Draw an altitude of the triangle by selecting one of the
vertices of the triangle and then select the opposite side. Again drag a
vertex and observe what happens to the altitude.
7. From the Curves menu option (third after the pointer icon) select circle.
Draw a circle with the triangle altitude as the radius. (Choose the vertex as
the center and the intersection of the two lines as the end point.) Try
moving different parts of the figure and see which properties are
maintained.