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#6 (permalink) |
dontcareaboutyou
Join Date: Apr 2006
Location: North Carolina
Posts: 5,145
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Why?
If you explain I might remember stuff. Edit: I think BC= 21 4/(7+x)= 3/x The radi are 3 and 4 so that's where I got 7 from. X is BC. 4x=3x+21 x=21
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