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TI-83 Plus Activities 591
11.Press
r
. After the graph is plotted, press
100
Í
to trace to
X=100
. Press
150
Í
. Press
188
Í
. Notice that as
X
increases,
the value of
Y
converges to
p
6
2
, which is approximately 113.097.
Y2=
p
B
2
(the area of the circle) is a horizontal asymptote to
Y1
. The
area of an N-sided regular polygon, with r as the distance from the
center to a vertex, approaches the area of a circle with radius r (
p
r
2
)
as N gets large.
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