Perimeter of the Ellipse (HP-15C)

[PedroLeiva]

I have develop a program for HP67 to calculate perimeter, surface and volume of an ellipse. The inputs are diameters, but for calculation uses radius. When the 3 diameters are the same figure the body transforms into an sphere. The input and outputs can be printed or screen flashes (HP97/67), but also the results remains in the stack
In the attach PDF (3 pages A4) includes: a) program listing, b) formulas, c) Instructions, d) PGRM Crd diagram, e) example and calculation comparison for sphere using ellipse program (differences in the 8th. decimal only, dif.=+-1)