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If I is the incenter of Delta ABC and R(...

If `I` is the incenter of `Delta ABC and R_(1), R_(2), and R_(3)` are, respectively, the radii of the circumcircle of the triangle IBC, ICA, and IAB, then prove that `R_(1) R_(2) R_(3) = 2r R^(2)`

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The correct Answer is:
`2R^2r`
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