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Kobotan [32]
3 years ago
12

Find BC of AC=21 and AB=9

Mathematics
1 answer:
Scrat [10]3 years ago
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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