perplexus.info :: Geometry : Ratio of Radii

Ratio of Radii (Posted on 2008-03-27)

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
	A useful intermediate!	Chesca Ciprian	2008-03-27 16:32:22

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