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© 2012 Texas Instruments Educaon Technology Page 37
Measurement menu
Storing the measurement as a variable
Noce the range of other
possible measurements available
from this menu.
With a triangle drawn on your screen, the next step is
to measure its area. Choose opon from the
Measurement menu (b8) and then move the cursor to
one of the sides of the triangle. The triangle label and the
poinng-nger icon appear together with a calculated area
in the background. Click to conrm the choice of the triangle,
then move your cursor to where you want the measurement
displayed then click again to show the measurement and
nally press d to remove the icon from the top le corner.
The area is now displayed (to the number of signicant gures
set in the ~722).
Remember you can place the cursor over the calculated
value (you should see the open-hand icon) and press + or -
several mes. The eect is to reduce the number of displayed
decimal places. This feature can be applied to any numbers on
the screen in either the Graph or Geometry applicaon.
There are two ways to make it clear that the measurement at
the boom of the screen represents an area. One method is to
simply add some text alongside the measurement. However,
a more powerful method is to allocate the measurement to a
variable and display the variable name alongside it. To do this:
• move the cursor over the measurement (you will see the
open-hand icon;
• press h and choose opon (Alternavely
press /h)
• use the alphabec keys to give the variable the name
“area”. Press ·.
This variable may now be used on other pages of the
document. For example, if you move to a Calculator
page, type and enter area, the current value of the
area will be used.