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Construct a Point on an Object in Cabri Jr.

By C. C. Edwards

You can use the Cabri Jr. geometry application on the TI-84 Plus to construct a point so that it becomes part of an existing object. To construct a point on an object, first press [WINDOW] and use


to highlight the Point tool. Press


to display the Point submenu and use


to highlight the Point on tool.

  1. Press [WINDOW] and use


    to highlight the Point tool.

  2. Press


    to display the Point submenu and use


    to highlight the Point on tool. Press [ENTER] to select that tool.

  3. Use the arrow keys to move the cursor to the location on the object where the point is to be located.

    The object blinks when the cursor is on the object.

  4. Press [ENTER] to place the point on the object.

    The point is placed on the object at the location of the cursor. If you move this point at a later time, the point will move, but it will not move off the object.

After constructing one point on an object, the Point on tool remains active until you deactivate it. So if you want to construct more points on the same or different object, just repeat Steps 3 and 4. When you are finished using that tool, deactivate it by pressing [CLEAR] or by selecting another menu item.