Construct Points of Intersection with GeoMaster on the TI84 Plus
GeoMaster on the TI84 Plus graphing calculator can construct the points of intersection of any pair of the following types of objects: lines, segments, rays, vectors, sides of polygons, circles, and arcs. If there is more than one point of intersection, GeoMaster will find all of these points.
To construct points of intersection, follow these steps:

Select the Intersection tool from the DRAW menu.
To do this, press [WINDOW] if the Menu bar is visible at the bottom of the screen or [GRAPH][WINDOW] if it is not. Repeatedly press
to highlight the Intersection tool and press [ENTER]. The tool you selected appears in the upperright corner of the screen.

Use the arrow keys to move the cursor to one of the objects in the intersecting pair of objects and press [ENTER].
After pressing [ENTER], the object just selected appears as a dashed figure.

Use the arrow keys to move the cursor to the other object in the intersecting pair and press [ENTER].
The point or points of intersection appear on the screen and the Intersection tool remains active. You can construct more points of intersections by following Steps 2 and 3. When you are finished using this tool, you deactivate it by pressing [CLEAR] or by selecting another menu item.
When you press [ENTER] to select an object and GeoMaster isn’t sure which object you want, it gives you a list of objects from which you choose one by pressing the number of the object.