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Procedure – Casio SERIES FX-9860G User Manual

Page 393

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20070201

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 fi le name OCTA.

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

hw(Value of A)

S when A = 7

w

V when A = 7

w
wbaw

S when A = 10

w

V when A = 10

w
wbfw

S when A = 15

w*

3

V when A = 15

A

A

S = 2

'

3 A

2

, V = A

3

––––

'

2

3

S = 2

'

3 A

2

, V = A

3

––––

'

2

3

8-1-2

Basic Programming Steps

*

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*

xw

Volume V .............

!x(')c/d*

Mdw

*

3

Pressing

w while the fi nal 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 ”<fi le name>”

w.

# Pressing

w while the fi nal result of a program

executed using this method is on the display

re-executes the program.

# An error occurs if the program specifi ed by Prog

”<fi le name>” cannot be found.