Advanced Geometric Problem & Solution (Twice a week update) Now 4837problems posted.
<Tri-2026-2361>,hint
<Tri-2026-2361>, general, incenter
<Spain MO 2361>
<Tri-2026-2360>, hint
<Tri-2026-2360>, general, similar
<Spain MO 1998>
<Qua-2026-828>, hint
