Casio FX-7400G PLUS User Manual page 150

Chapter 8 Programming
2. Recall the program.
P.20
Example 2
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.
Use the following key operations when inputting the program.
Compare this with the program for calculating the surface area and volume of a
regular octahedron.
136
• 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
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)
A
S = 3 A 2 , V = –––– A
Length of One Side A .. !W[1(?)aaA[3(:)
Surface Area S ............ !9d*aAx[[2(^)
Volume V ..................... !9c/bc*aAMd
Length of One Side A .. !W[1(?)aaA[3(:)
Surface Area S ............ c*!9d*aAx[[2(^)
Volume V ..................... !9c/d*aAMd
Surface Area (S)
7 cm
10 cm
15 cm
2
3
12
Volume (V)
cm cm
2
cm cm
2
cm cm
2
3
3
3