Advanced Geometric Problem & Solution (Twice a week update) Now 4501 problems posted.
<Tri-2024-2156>, hint
Since <OCQ=90, <OQC=90- <A.
Suppose QN //AC, then <CNQ=<C, <CQN=CAN=<B, ANCM is a parallelogram.
(BOC) , NM and AQ meet in Q.
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