Advanced Geometric Problem & Solution (Twice a week update) Now 4876 problems posted.
<Tri-2026-2790>, hint
<Tri-2026-2790>, right, others
<Sweden MO 2011>
<Tri-2026-2789>, hint
<Tri-2026-2789>, general, angle
<Sweden MO 2010>
<Tri-2026-2788>, hint
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