Let ABC be an acute angled triangle with angleBAC = 60 and AB > AC. Let

I be the incenter, and H the orthocenter of the triangle ABC. Prove that

angle AHI = 3/2 angle ABC:

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- Oct 2nd 2012, 03:25 AMgeniusgarvilpure geometry
Let ABC be an acute angled triangle with angleBAC = 60 and AB > AC. Let

I be the incenter, and H the orthocenter of the triangle ABC. Prove that

angle AHI = 3/2 angle ABC: