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Ratio of Radii (Posted on 2008-03-27) Difficulty: 2 of 5
Let r, R, and s be the inradius, circumradius, and semiperimeter of triangle ABC.
If /A ≥ 90°, prove that

    r     a sin(A)
   --- ≤ ----------
    R        2s

See The Solution Submitted by Bractals    
Rating: 3.5000 (2 votes)

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  Subject Author Date
SolutionA useful intermediate!Chesca Ciprian2008-03-27 16:32:22
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