Where to put static and variable values in this equation of an ellipse?

Question

From Wikipedia, here's the equation of an ellipse:

I want all ellipses to have a width of 240 pixels.

And want to the height of all ellipses to be a value between 10 and 60 pixels which will be randomly generated.

Something like this:

My questions is where do I plug in the 240, and where do I plug in my randomly generated height values?

Answer 1

a and b are the radii of the ellipse.

This is the answer I was looking for:

.. where h = randomly generated height between 10 and 60.

Because an ellipse has two radii, instead of just one in the case of a circle.