Texas Instruments TI-83-Plus - Page 69

TI-83 Plus GeoMaster™ Application Page 69
The next series of steps sets up the sum of the angle
measurements in L1, and displays the data in the list editor.
1. Press
e
["]
\ 
, and then select
L1GEO
.
2. Press
¥ \ 
, and then select
L2GEO
.
3. Press
¥ \ 
, and then select
L3GEO
.
4. Press
¡ \ G
.
5. Press
¯
to complete the setup.
6. Press
g
and then select
Edit
.
You can see that the sum
of the angles of the
triangle, no matter what its
shape, is 180 degrees.
This symbol
indicates that L1 is
a locked list. It will
be dynamically
updated if you
change any value
in L1GEO –
L3GEO.