Find Length X in Triangle: Learn How to Calculate It

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SUMMARY

The length X in the triangle can be calculated using the relationship established by similar triangles. The discussion confirms that if FH and HC are perpendicular, then angle CHF equals 90 degrees. The answer for length X is definitively 5, derived from the formula x = 4 * CF / BF, where CF and BF are the lengths of the respective segments in the triangle.

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ketanco
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what is the length x? (FH and HC perpendicular too, which I missed to write)
I am totally stuck can not make any progress on this question. Answer should be 5. I don't know how to obtain it

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ketanco said:
FH and HC perpendicular too
Does that mean that angleCHF = 90?
Your writing is terrible!
AB = 9 and EF = 4?

Not important but why is there no point G (you jumped from F to H!)
 
ketanco said:
what is the length x? (FH and HC perpendicular too, which I missed to write)
I am totally stuck can not make any progress on this question. Answer should be 5. I don't know how to obtain it

Hint: Which triangles are similar to each other?
(Two triangles are similar if they have 2 angles in common.)
 
Once you get Klaas' hint, you should "see" that x = 4 * CF / BF
 

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