Texas Instruments TI-84 - Manual (Page 510)

Chapter 17: Activities 507
3. Enter N=4 and B=6 to find the area ( A ) of a square with a distance ( B ) from center to
vertex of 6 centimeters.
4. Press
} } to move the cursor onto
A , and then press
ă \. The solution for
A is displayed on the interactive solver editor.
5. Now solve for B for a given area with various number of sides. Enter A=200 and N=6 .
To find the distance B , move the cursor onto B , and then press
ƒ \.
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
p6
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
.