How to Use Cabri Jr. Menus on the TI-84 Plus

By C. C. Edwards

The Cabri Jr. geometry application on the TI-84 Plus has five menus that are accessed by pressing the Graphing keys ([Y=], [WINDOW], [ZOOM], [TRACE], and [GRAPH]) that appear on the calculator right below the screen. Here’s an overview of what’s available in these menus:

  • F1: File. (Press [Y=] to access this menu.)

    This is the menu you use when you want to create, save, or recall files or when you want to exit the Cabri Jr. application.

  • F2: Creation. (Press [WINDOW] to access this menu.)

    This menu contains the commands that allow you to create points, lines, segments, circles, triangles, and quadrilaterals.

  • F3: Construction. (Press [ZOOM] to access this menu.)

    This menu contains the commands that allow you to construct perpendicular and parallel lines, angle bisectors, and midpoints.

  • F4: Transform. (Press [TRACE] to access this menu.)

    This menu contains the commands that allow you to transform objects by translating, reflecting, rotating, and/or dilating them.

  • F5: Appearance. (Press [GRAPH] to access this menu.)

    As the title of the menu says, this is the menu that houses the commands that let you hide objects, display objects as dashed or solid lines, or label your objects. But what’s not conveyed by the title are the many other useful commands the menu contains, such as the commands for finding length, area, and angle measure.

If you are cruising through a Cabri Jr. menu and decide not to make a selection, press [CLEAR] to get out of the menu and back to the Cabri Jr. screen. If you are in a submenu, press [CLEAR] twice; once to get back to the main menu, and again to get back to the screen.

To select a menu item, first press the key that accesses the desired menu. The last command used in this menu is highlighted and a symbol representing this command appears in the upper left of the screen. The first picture illustrates this where Point was the last command selected from the F2 menu.


The right arrow next to a menu item, as in the first picture, indicates that the item has a submenu. To display that submenu, highlight the menu item and press


This is illustrated in the second picture where you see the submenu for the Point Command. Pressing


takes you back to the main menu.

If necessary, repeatedly press


to highlight the command you wish to use, and then press [ENTER] to select that command. The upper-left corner of the screen contains a pictorial reminder of what command is active. This is illustrated in the third picture for the Intersection command.