Texas Instruments TI-73 Manual Book page 35

Measuring the Length of an Arc
On a circular board, you can measure the length of any single
arc that you have drawn. You must specify the same starting and
ending points that you used to draw the arc. However, the
starting point must not be shared by another object. The length
is always measured clockwise from the starting point to the
ending point.
Tip If you are uncertain of the arc's starting and ending points, you can
use the
1. Select
appears.
2. Select
3. Use the  and  keys to move to the arc's starting point,
and press the E key.
E key. The arc length value appears.
4. Move the cursor to the arc's ending point, and press the
5. Select the TI 73 list in which you want to store the value, or
select
commands reappear.
TI-73 Geoboard
FMAT
command to display labels.
(press the key). The
MEAS
. The board reappears, with the
Arc Length
to discard the value. The main Geoboard
QUIT
MEASUREMENT
prompt.
Arc
menu
Page 35