Using the TI-83

Area

Press and scroll down to
GeoMaster.
You can also press and then
, which is the letter G.
Select MEAS on the menu.
There are 7 choices.
Draw a figure and press
to access the menu.
Select Area from the menu
and press ENTER.
The area is calculated and
shown on the screen.
Select Slope from the menu.
Move the cursor to one of
the line segments and press
ENTER. The slope is shown.