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21-04-2018
Mathematics

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What is BC if AC= 12, DC= 4 and EC=9

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calculista calculista

01-05-2018

the complete question in the attached figure

we know that
Based on the secant theorem
AC*BC=EC*DC
so
BC=[EC*DC]/AC
AC=12
DC=4
EC=9
BC=[9*4]/12------> BC=36/12------> BC=3

the answer is
BC=3

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