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Topic:
BlankenhornRamanujan Ellipse circumference formula
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BlankenhornRamanujan Ellipse circumference formula
Posted:
Dec 25, 2012 7:35 PM


Added improvement to the BlankenhornRamanujan ellipse circumference formula with easier to memorize numbers:
C~pi(a+b)*(1+3h/(10+sqrt(43h)) +(1.5*h^60.5*h^12)/((11pi/(4414pi))+24100(1h)))
Where a and b are the half length axes and h = (ab)^2/(a+b)^2
Referencing http://i39.photobucket.com/albums/e191/toomers/ell1.jpg, replace the h^5.20114 with 1.5*h^60.5*h^12, and the 19176 with 24100.
See: http://ellipsecircumference.blogspot.com



