Wow thanks all for your help! Lots of different solutions.
And the winner is Birdie with exactly what I needed (to know the radius at a given Y coord). Thx! Basically I didn't want to use an angle as I wanted to step the Y coord by a constant amount. Gosse also had a formula that would have worked by the look of things.
And the winner is Birdie with exactly what I needed (to know the radius at a given Y coord). Thx! Basically I didn't want to use an angle as I wanted to step the Y coord by a constant amount. Gosse also had a formula that would have worked by the look of things.