ollysuper

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 #5
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triangle  XBA similar to triangle BCA

triangle  XCB similar to triangle BCA

look here

So

 

triangle XCB is similar to triangle XBA

 

So

 

CX / XB  = XB / AX

 

4 / XB   XB / 12

 

XB^2  =  48

 

XB  = sqrt (48)  =  4 sqrt (3) 

Thanks for explanation 

Sep 29, 2023
 #2
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+1

Also here is the explanation

Mar 2, 2023
 #3
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0
Jan 25, 2023
 #2
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0
Nov 16, 2022