(35S) Perimeter of ellipse (Ramanujan 2nd Approximation)

[mchris]

And if we put the following code to the end we get also the distance of the focal points from the center, on stack Y

Code:

P029    RCL A
P030    X^2
P031    RCL B
P032    X^2
P033    -
P034    ABS
P035    SQRT
P036    X<>Y