Sentry Industries CA756 - Manual (Page 64)

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The octahedron program can be changed to a tetrahedron
program by deleting the parts marked with wavy lines,and
changing those that are marked with straight lines.
In actual practice,this would be performed as follows:
Program execution
Now this program will be executed.
Formulas
For a surface area S,volume V and one side A, S and V for
a regular tetrahedron are defined as:
Programming
As with the previous example,the length of one side is
stored in memory A and the program then constructed.
Numeric value A
Program editing
First, a comparison of the two programs would be
helpful.