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Question Number 28240 by $@ty@m last updated on 22/Jan/18

Answered by ajfour last updated on 22/Jan/18

$$DE\times EA=CE\times EF$$$$6\times 2=6\sqrt{2}\times EF$$$$\Rightarrow EF=\sqrt{2}soCF=7\sqrt{2}$$$$letfootof\mathrm{\perp }fromFonBCbeG.$$$$CG=7,GB=1,FG=7$$$${BF}^2={GB}^2+{FG}^2$$$$=1+49=50$$$$BF=5\sqrt{2}\approx 7.07$$

Commented by $@ty@m last updated on 22/Jan/18

$$Thankyouverymuch.$$

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