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In A B C ,l e tR=c i r c u m r a d i u ...

In ` A B C ,l e tR=c i r c u m r a d i u s ,r=in r a d i u sdot` If `r` is the distance between the circumcenter and the incenter, the ratio `R/r` is equal to `sqrt(2)-1` (b) `sqrt(3)-1` `sqrt(2)+1` (d) `sqrt(3)+1`

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