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 p62, which is approximately 113.097.
Y2=pB2 (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 (pr2)
as N gets large.