Procedure – Casio fx-9860G SD User Manual
Page 390
20050401
○ ○ ○ ○ ○
Example 1
To calculate the surface area (cm
2
) and volume (cm
3
) of three regular
octahedrons when the length of one side is 7, 10, and 15 cm,
respectively
Store the calculation formula under the file name OCTA.
A
The following are the formulas used for calculating surface area S
and volume V of a regular octahedron for which the length of one side
A is known.
Procedure
1
m PRGM
2
3(NEW)OCTAw*
1
3
!J(PRGM)4(?)aav(A)6(g)5(:)*
2
c*
!x(
)d*av(A)x6(
g)5(^)
!x(
)c/d*av(A)
Md
JJ
4
1(EXE) or w
h
w(Value of A)
w
w
wbaw
w
w
wbfw
w*
3
8-1-2
Basic Programming Steps
2
S = 2 3 A
2
,
V = –––– A
3
3
*
1
Press 3(NEW) and the cursor changes form
to indicate alpha character input.
*
2
The following shows how the calculation of the
surface area and volume of a regular
octahedron would be calculated using a
manual calculation.
Surface Area S ... c*!x(
)d*
Volume V ............ !x(
)c/d*
Mdw
*
3
Pressing w while the final result of a program
is on the display changes to the program list.
# You can also run a program while in the RUN
•
MAT mode by inputting: Prog ”
# Pressing w while the final result of a program
executed using this method is on the display
re-executes the program.
# An error occurs if the program specified by Prog
”
S when A = 7
V when A = 7
S when A = 10
V when A = 10
S when A = 15
V when A = 15