need certain "equation"


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need certain "equation"



>ryanaggabao@juno.com wrote:
> I nees some sort of equation to draw the earth (more accurately than a circle)

Well, it sounds like you want an ellipse (flat on sides, round on top)
the standard form for an ellipse equation is
(x-h)^2  +  (y-k)^2  1
-------     ------- =
  a^2         b^2
In this equation, (h,k) is the center; a is the lenght of the verticle axis
(in your case, a^2 will be smaller than b^2); b is the horizontal axis.
j.k.w@lnk.goexcel.net