Troy,
I am going to assume that your oval is an ellipse.
![](troy1.1.gif)
Unfortunately there is no simple expression for the perimeter of an ellipse, but there is an approximation that you can find in a solution to an earlier problem. To use this approximation you need the lengths of the semi-axes a and b of the ellipse. In your situation a = 19 ft and b = 9 ft. The approximation is to the perimeter is
![](troy1.3.gif)
Penny
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