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I don’t know these so please help me out

I don’t know these so please help me out-example-1

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1 vote

Answer:


BF=45

Explanation:

In the triangle
ABF and triangle
ACE


BF||CE\\ \Rightarrow \angle ABF=\angle ACE\\ \Rightarrow \angle AFB=\angle AEC\\ \angle A=\angle A

Hence from
AAA\ \
\Delta ABF\cong \Delta ACE


(BC)/(CE)=(AB)/(AC)\\(BF)/(CE)=(AB)/(2AB)\\BF=(1)/(2)* CE\\BF=(1)/(2)* 90\\BF=45

User Victor Dyachenko
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