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 Feb 4, 2021
 #1
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BE = BC = 8           BD = EF = 2              BG = 5            CH = 4

 

∠CBE = cos-1(BG / BE)

 

∠ABC ≅ ∠ACB = 1/2(180 - ∠CBE)

 

AB = BH / cos∠ABC  smiley

   

 Feb 4, 2021
edited by jugoslav  Feb 4, 2021

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