I drew an oval using the ellipse tool of a vector-based drawing program. It's 23.5 mm wide and 21.5 mm high. There is a chord 15 mm long perpendicular to the minor axis. So the question is, how do I calculate the distance from the chord to the end of the ellipse (i.e., the end of the major axis).(adsbygoogle = window.adsbygoogle || []).push({});

(By the way, I've been wracking by brains trying to figure out an oval that's just a stretch-out circle could be a conic section. The best I can figure is a cone with an extremely small angle, cut diagonally many miles from the apex.)

http://lightcolorvision.wordpress.com/

(There a diagram near the top of this blog, entitled "Need help on this problem.")

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# Question about ellipse and chord

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