Just in case a plugin doesn't already exist:
There are simpler equations, but I think this is one of the few that
will work in all cases.
r = ( (d^2+e^2) / (4a^2) - f/a )^(1/2)
Where 'r' is the radius and the other variables are 3x3 or 4x4
matrices involving the set of X,Y points. The matrices are defined at
http://mathworld.wolfram.com/Circle.html, equations #31-34.
On 7/25/06, Jim Son Chou <
[hidden email]> wrote:
> Hi, All:
>
>
>
> We are trying to find the radius of curvature of an arch. Is there a plug
> in that can perform this kind of operation?
>
>
>
> Jim