Texas Instruments 83PL/CLM/1L1/V - 83 Plus Calc, Manual Book, Page: 591 / 827

TI-83 Plus Activities 588
Computing Areas of Regular N-Sided
Polygons
Problem
Use the equation solver to store a formula for the area of a regular
N-sided polygon, and then solve for each variable, given the other
variables. Explore the fact that the limiting case is the area of a circle,
p r
2
.
Consider the formula A = NB
2
sin( pà N) cos( pà N) for the area of a
regular polygon with N sides of equal length and B distance from the
center to a vertex.
N = 4 sides N = 8 sides N = 12 sides
Procedure
1. Press

0
to select
0:Solver
from the
MATH
menu. Either the
equation editor or the interactive solver editor is displayed. If the