JesusSoto1 JesusSoto1
  • 24-05-2017
  • Mathematics
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Find the missing length indicated

Find the missing length indicated class=

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paulancka
paulancka paulancka
  • 24-05-2017
12/21 = x/(x + 21) , x is the side of the smaller triangle 
12x + 252 = 21x
9x = 252
x = 28
Length needed 28 +21 = 491
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