SOLUTION: if ab=16 and ac=21 find the lenght of bc how do i find this answer out can you show me step by step

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Question 215946: if ab=16 and ac=21 find the lenght of bc how do i find this answer out can you show me step by step
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Is it a triangle? A right triangle? Just a line?
More info is needed.