Texas Instruments TI-83 Plus Manual Book page 10

Guessing the Angle
After selecting an angle type from the main menu, the first scene
begins.
Two rays with a common endpoint (vertex) are drawn. Then an arc
is traced from one ray to the other. This is the angle you must
measure. The question
by a cursor.
make a change to the numbers you input, press ^ to
1. Input your answer using the number keys. If you want to
backspace. When you are done, press ¯.
2. If your guess is correct, the word
TI-83 Plus What Is My Angle? Application
WHAT IS MY ANGLE?
is displayed, followed
appears.
CORRECT!
Page 10