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)

(In reply to Solution with explanation by FrankM)

Nice!

Posted by Jason Booza on 2020-05-26 15:19:14