ATTENTION : MeritnationExperts (Maths) PLEASE EXPLAIN ASAP
Q: ABC is a triangle right angle at A. Find the area of the shaded region if AB and BC as sides and AC as hypotenuse. An incircle XYZ is inscribed in it with points X,Y,Z on sides AB, BC, CA respectively, and centre O. Prove that:

OX =OY = OZ = (AB + BC - AC)/2

Hi, 
If A is the right angle triangle then AC cannot be hypotenuse. So kindly recheck the question. 

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