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It has become obvious that the Shapes category was in way over its head with all sorts of geometrical problems. So, the hard-core Geometry problems will now reside here, where they will fit in much better.
Prove the following theorem:
The radius r of the circle inscribed in any triangle, say ABC ,
equals 1/3 of the harmonic average of the 3 altitudes,
i.e.
1/r = 1/h(A)+1/h(B)+1/h(C)
(No Solution Yet, 3 Comments) Submitted on 2020-05-08 by Ady TZIDON   
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