Texas Instruments TI-73 Manual Book page 33

Measuring an Object's Perimeter
You can measure the perimeter of any closed polygon that has
no intersecting lines.
1. Select
appears.
2. Select
prompt.
3. Use the cursor keys (, , , and ) to move to any
vertex on the object, and press the E key. The perimeter
appears.
4. Select the TI 73 list in which you want to store the perimeter
value, or select
Geoboard commands reappear.
Tip If you have drawn multiple objects on the board, select a point
select a shared point instead, you must use the  key to select
that is unique to the object that you want to measure. If you
the object before pressing E.
5. Press to stop measuring.
TI-73 Geoboard
(press the key). The
MEAS
. The board reappears, with the
Perimeter
QUIT
to discard the value. The main
MEASUREMENT
Perimtr
menu
Page 33