4 years ago

Find BC of AC=21 and AB=9

1 answer:

7 0

The answer is 12. How did I get it?

< - - - - -- - - - - - - - - - - - - - - - - - - >
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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