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TI-83 Plus Activities 590
6. Enter
N=8
. To find the distance
B
, move the cursor onto
B
, and then
press
ƒ
\
. Find
B
for
N=9
, and then for
N=10
.
Find the area given
B=6
, and
N=10
,
100
,
150
,
1000
, and
10000
. Compare
your results with
p
6
2
(the area of a circle with radius 6), which is
approximately 113.097.
7. Enter
B=6
. To find the area
A
, move the cursor onto
A
, and then press
ƒ
\
. Find
A
for
N=10
, then
N=100
, then
N=150
, then
N=1000
,
and finally
N=10000
. Notice that as
N
gets large, the area
A
approaches
p
B
2
.
Now graph the equation to see visually how the area changes as the
number of sides gets large.
8. Press
z
. Select the default mode settings.
9. Press
p
. Set the viewing window.
Xmin=0 Ymin=0 Xres=1
Xmax=200 Ymax=150
Xscl=10 Yscl=10
10.Press
o
. Turn off all functions and stat plots. Enter the equation for
the area. Use
X
in place of
N
. Set the graph styles as shown.