lorielle98777 lorielle98777
  • 18-10-2017
  • Mathematics
contestada

Find BC of AC=21 and AB=9

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tejanoajet
tejanoajet tejanoajet
  • 31-10-2017
The answer is 12. How did I get it?

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A                         B                         C

AC = 21 (the whole line adds up to 21)
AB = 9   (half of the line is 9)
BC = AC-AB 

21- 9 = 12 so BC is 12 
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