Using the TI-83

Area

Press and select 4:AreaForm
Press until you see this screen.
Select the first option.
Select one of the shapes.
For this example, we will use
5:TRAPEZOID. When you make the
selection, the definition will appear.
Now, select the Area option.
Selecting "WHY" will initiate a
geometric demonstration of how the
formula is developed.
Selecting "EXAMPLE" will initiate
an example being worked out.
If you wish to take the quiz, select
that option from the Select a Mode
screen.
Choose the level your wish to take.
A quiz question will look like this.