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Let ABC be triangle having o and I as its circumcenter and incentre, respectively. If R and r are the circumradius and the inradius, respectively, then (OI)^(2) = ...... Further and also the triangle AIO is a right angle triangle if and only if a, b, c are in ...... |
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Answer» `R^(2) - 2Rr, A.P` |
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