Perimeter of Ellipse

[ggauny@live.fr]

(03-07-2016 03:34 PM)Joe Horn Wrote:  

(03-06-2016 02:16 PM)Wes Loewer Wrote:  or this work-around:

Code:

EXPORT EllipsePerimeter(a,b)
BEGIN
 RETURN approx(int(√(((a*COS(T))^2+(b*SIN(T))^2)),T,0,2*π));
END;

Your program above (unlike mine) always agrees with Wolfram Alpha's perimeter of an ellipse, even for very eccentric ellipses. Congratulations!