Texas Instruments TI-83-Plus - Page 60

TI-83 Plus GeoMaster™ Application Page 60
8. Press
s
to exit the
Label
tool.
Your screen should look similar to this:
9. Find the angle measurements for
o
EHD and
o
FGB.
10. Press
s
to exit the
Angle
tool.
11. Move the cursor to a point on one of the lines, and then
press
¯
.
Note
A dialog box lists all of the objects at the intersection point.
Highlight the point label, and then press
¯
to select it.
12. Press
¯
again, and use the arrow keys to rotate the line.
Notice that the alternate
exterior angles have
equal measure.