AD and BD touch the circule at points A and B(adsbygoogle = window.adsbygoogle || []).push({});

AC is parallel to BD

prove that:

1. DF^2 = AF*EF

2. BF = DF

its obvious that BF^2 = EF * AF i tried proving that DF = FB but with no luck.

edit: i uploaded the wrong picture earlier, terribly sorry i have so many of them

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# Homework Help: Geometry of circle

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