Tangents of a Parabola to a Focal Chord

Author:
Robin Nagy

Move points A and B and slider a (focal length) to see that tangents to a parabola at the ends of a focal chord meet at right angles at the directrix.

Move points A and B and slider a (focal length) to see that tangents to a parabola at the ends of a focal chord meet at right angles at the directrix.

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