Texas Instruments TI-73 Explorer User manual

11/14/01 © 2001 Texas Instruments
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How To…
Start and Quit the Application
Use On-screen Options
View Definitions and Area Formulas
Take the Quiz
Delete the Application
More Information
Error Recovery
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TI-73 / TI-83 Plus Area Formulas Page 2
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Texas Instruments makes no warranty, either expressed or
implied, including but not limited to any implied warranties of
merchantability and fitness for a particular purpose, regarding
any programs or book materials and makes such materials
available solely on an “as-is” basis.
In no event shall Texas Instruments be liable to anyone for
special, collateral, incidental, or consequential damages in
connection with or arising out of the purchase or use of these
materials, and the sole and exclusive liability of Texas
Instruments, regardless of the form of action, shall not exceed
any applicable purchase price of this item or material. Moreover,
Texas Instruments shall not be liable for any claim of any kind
whatsoever against the use of these materials by any other
party.
Graphing product applications (Apps) are licensed. See the
terms of the license agreement for this product.
TI-GRAPH LINK and TI Connect are trademarks of Texas
Instruments. All other trademarks are the property of their
respective owners.

TI-73 / TI-83 Plus Area Formulas Page 3
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The Area Formulas application reviews the definitions and the
area formulas for the rectangle, square, parallelogram, triangle,
trapezoid, and circle. The development of the formulas is shown
graphically, and several examples of the calculation of the area
are given for each shape. A 15-question multiple-choice quiz—
you can choose between two levels of difficulty—provides
practice at applying the formulas. Immediate feedback is given
after each problem is answered, and the high score is saved.
The Area Formulas application is a concept application that TI
wants to share with our customers, educators, and students
before the product definition and testing are complete. It is an
alpha software version, and as such, it may contain
imperfections, or the coding may be incomplete.
TI invites your feedback concerning the functionality and
educational value of the Area Formulas application. Please send
your comments and questions to [e-mail].

TI-73 / TI-83 Plus Area Formulas Page 4
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Note
In this user guide, any information that pertains to the TI-83 Plus also
pertains to the TI-83 Plus Silver Edition, unless otherwise noted.
Hardware and software
Notes
TI-73 with version 1.50 or higher of the
Graph Explorer software
—or—
TI-83 Plus or TI-83 Plus Silver Edition
with version 1.13 or higher of the
operating system software
You can download a free copy of the
latest Graph Explorer or operating
system software from
education.ti.com/softwareupdates.
Follow the link to Operating Systems.
Computer with Windows®
95/98/2000/XP, Windows NT®, or
Apple® Mac® OS 7.1 or higher installed
TI-GRAPH LINK™ computer-to-
calculator cable
If you do not have this cable, call your
distributor, or order the cable from
TI's online store.
TI-GRAPH LINK software that is
compatible with the TI-73 or the
TI-83 Plus
—or—
TI™ Connect software (available at the
end of 2001). TI Connect works with all
supported models of TI graphing
calculators.
You can download free copies of
TI-GRAPH LINK and TI Connect from
education.ti.com/softwareupdates.
Follow the link to Connectivity
Software.

TI-73 / TI-83 Plus Area Formulas Page 5
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Detailed instructions on installing this and other applications are
available at education.ti.com/guides. Follow the link to Flash
installation instructions.
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The instructions in this guidebook are only for this application. If
you need help using the TI-73 or TI-83 Plus, refer to its
comprehensive guidebook at education.ti.com/guides.
TI invites your feedback concerning the functionality and
educational value of the Area Formulas application. Please send
your comments and questions to [e-mail].

TI-73 / TI-83 Plus Area Formulas Page 6
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1. Press
Œto display the list of applications on your
calculator.
2. Select
AreaForm. The application’s information screen is
displayed.
3. Press any key to continue. The programmer’s screen is
displayed.
4. Press any key to continue. The SELECT A MODE menu is
displayed.
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If you are in the middle of an activity, press y5repeatedly
until you get back to the main menu.
To quit the application, select QUIT from the application’s main
menu, or press y5.

TI-73 / TI-83 Plus Area Formulas Page 7
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Many of the screens in the Area Formulas application display
options across the bottom of the screen that you use to navigate
through the application. To select one of these options, press the
graphing key directly below the option.
opqrs
Press a graphing key
to select one of these
options. For example,
press ror s
to select EXAMPLE.

TI-73 / TI-83 Plus Area Formulas Page 8
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To display information about shapes, select DEFINITIONS &
FORMULAS from the SELECT A MODE menu. The SELECT A SHAPE
menu is displayed.
To display this
information…
Select this option:
Display
Shape definition
Shape name from the
SELECT A SHAPE
menu
—or—
DEF from the AREA,
EXAMPLE, or WHY?
screen
Area formula for
the shape
AREA from the shape
DEFINITION screen

TI-73 / TI-83 Plus Area Formulas Page 9
To display this
information…
Select this option:
Display
An example of
calculating a
shape’s area
EXAMPLE from the
AREA screen or the
DEFINITION screen
Tip: Select EXAMPLE
again to display a
different example for
the same shape.
Explanation of the
area formula (not
available for all
shapes)
WHY? from the AREA
screen
Tip: Select WHY?
again to return to the
original AREA screen.
To view information about another shape, select MENU to return
to the SELECT A SHAPE menu, and then select another shape.
Tip
Press y5to return to the previous menu.

TI-73 / TI-83 Plus Area Formulas Page 10
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The Area Formulas quiz contains two levels. Level one assesses
your ability to compute the area of basic shapes. Level two is a
bit more challenging, assessing your ability to compute the area
of irregularly shaped objects. Each quiz consists of 15 problems.
Each correct answer in level one is worth 12 points. Each correct
answer in level two is worth 25 points. Incorrect answers are
worth 0 points in both levels.
1. Select
AREA QUIZ from the SELECT A MODE menu. The SELECT
A LEVEL screen is displayed.
2. Use the arrow keys to highlight a level, and then press
Í. The first problem is displayed.

TI-73 / TI-83 Plus Area Formulas Page 11
3. Calculate the area and then select the letter that
corresponds to your answer. Your answer is checked, and
then the next problem is displayed.
At the end of the quiz, your score and the high score are displayed.
Select PROBLEMS to return to the SELECT A LEVEL screen.
Tip
If you need to end the quiz before you have completed all 15
problems, press ‘to display your current score. The score
is reset to 0 when you return to the quiz.
After you select an answer, either “CORRECT!”
or your answer and the correct answer are
displayed for a few seconds before the next
problem is displayed.

TI-73 / TI-83 Plus Area Formulas Page 12
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1. Press
yLto display the MEMORY menu.
2. Select
Delete.
3. Select
Apps.
4. Move the cursor to AreaForm.
5. Press
Í. A confirmation message is displayed.
6. Select
Yes to delete the application.
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1. Press
yLto display the MEMORY menu.
2. Select
Mem Mgmt/Del.
3. Select
Apps.
4. Move the cursor to AreaForm and press {. A confirmation
message is displayed.
5. Select
Yes to delete the application.

TI-73 / TI-83 Plus Area Formulas Page 13
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Low Battery
Do not attempt to download a Flash application if the low-battery
message appears on the home screen. Low battery indication is
shown on the initial screen. If you receive this error during an
installation, change the batteries before trying again.
Invalid Signature or Certificate
Either this calculator does not have a certificate to run the
application, or electrical interference caused a link to fail. Try to
install the application again.
Error in Xmit
This problem is usually associated with the unit-to-unit cable and
its connection between the calculators. Make sure the cable is
firmly inserted in the link port of each calculator.

TI-73 / TI-83 Plus Area Formulas Page 14
Link Transmission Error
This error indicates that the TI-GRAPH LINK™ software or
TI™ Connect software is unable to communicate with the
calculator. The problem is usually associated with the
TI-GRAPH LINK cable and its connection to the calculator or to
the computer.
•Make sure the cable is firmly inserted in the calculator’s link
port and the computer’s serial or USB port.
•Verify that the correct cable type is selected in the software
link settings.
•Verify that the correct communications port (Com Port) is
selected in the software link settings. (This step does not
apply if you are using the USB port and TI Connect).
If this does not correct the problem, try a different
TI-GRAPH LINK cable and restart your computer.

TI-73 / TI-83 Plus Area Formulas Page 15
Archive Full
This error occurs when the TI-83 Plus does not have sufficient
memory for the application. In order to make room for another
application, you must delete an application or archived variables
from the TI-83 Plus. Before you delete an application from the
TI-83 Plus, you can save it on your computer using
TI-GRAPH LINK™ software for the TI-83 Plus or TI™ Connect
software. You can reload it to the TI-83 Plus later using the
TI-GRAPH LINK software or TI Connect software.
Memory Error
This error occurs when the TI-73 does not have sufficient
memory for the application. In order to make room for another
application, you must delete an application from the TI-73.
Before you delete an application from the TI-73, you can save it
on your computer using TI-GRAPH LINK software for the TI-73
or TI Connect software. You can reload it to the TI-73 later using
TI-GRAPH LINK software or TI Connect software.
Other Errors
See Appendix B in the TI-73 manual or pages B-6 through B-10
in the TI-83 Plus manual for information about the specific error.

TI-73 / TI-83 Plus Area Formulas Page 16
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The Area Formulas application is compatible with TI-73 Graph
Explorer software version 1.50 and higher or the TI-83 Plus
operating system 1.13 and higher.
To verify your operating system version number:
1. From the home screen, press yL.
2. Select
ABOUT.
The operating system version number is displayed below the
product name and has the format x.yy. The ID number appears
on the line below the product number.

TI-73 / TI-83 Plus Area Formulas Page 17
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The version number appears on the information screen below
the application name. To display the information screen, do one
of the following:
•Press Œ, and then select AreaForm.
—or—
•Select INFO from the application’s main menu.
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TI-73
1. From the home screen, press yL.
2. Select Check Apps.
The Area Formulas application requires one free space to load
the application.
For more information about memory and memory management,
refer to the TI-73 manual.

TI-73 / TI-83 Plus Area Formulas Page 18
TI-83 Plus
1. From the home screen, press yL.
2. Select Mem Mgmt/Del.
The Area Formulas application requires at least 16,535 bytes of
ARC FREE (Flash), or one space, to load the application.
For more information about memory and memory management,
refer to the TI-83 Plus manual.

TI-73 / TI-83 Plus Area Formulas Page 19
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(Including Preview, Prototype, and Demo Apps)
BY DOWNLOADING THE SOFTWARE AND/OR DOCUMENTATION YOU AGREE TO ABIDE BY
THE FOLLOWING PROVISIONS.
1. LICENSE: Texas Instruments Incorporated (“TI”) grants you a license to use and copy the
software program(s) (“License Materials”) contained on this diskette/CD/web site. You, and any
subsequent user, may only use the Licensed Materials on Texas Instruments calculator
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agrees that he/she will not delete the copyright notice, trademarks or protective notices from the
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support for this concept application may be available from TI.
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subjected concept applications to rigorous testing and that the concept application may cause
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is possible for a concept application to cause calculator crashes or lock ups which may be
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TI-73 / TI-83 Plus Area Formulas Page 20
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