Casio fx-7400G PLUS Programming - Manual (Page 12)

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Chapter 8 Programming
2. Recall the program.
• The procedures you use for editing program contents are identical to those used
for editing manual calculations. For details, see “Making Corrections”.
• The following function keys are also useful when editing program contents.
1 (TOP) ........ Moves the cursor to the top of the program
2 (BTM) ....... Moves the cursor to the bottom of the program
Example 2
To use the OCTA program to create a program that calculates
the surface area and volume of regular tetrahedrons when the
length of one side is known
Length of One Side (A) Surface Area (S) Volume (V)
7 cm cm 2 cm 3
10 cm cm 2 cm 3
15 cm cm 2 cm 3
The following are the formulas used for calculating surface area S and volume V of a
regular tetrahedron for which the length of one side is known.
2
S = 3 A 2 , V = –––– A 3
12
Use the following key operations when inputting the program.
Length of One Side A .. !W[1(?) aaA[3(:)
Surface Area S ............ !9d*aAx[[2( ^)
Volume V ..................... !9c/bc*aA Md
Compare this with the program for calculating the surface area and volume of a
regular octahedron.
Length of One Side A .. !W[1(?) aaA[3(:)
Surface Area S ............ c*!9d*aAx[[2( ^)
Volume V ..................... !9c/d*aA Md
P.20
A