Advanced Geometric Problem & Solution (Twice a week update) Now 4912 problems posted.
<Tri-2026-2810>, hint
<Tri-2026-2810 >, general , concurrency
<Swiss MO 2020>
<Tri-2026-2809>, hint
<Tri-2026-2809?. general, angle
<Swiss MO 2019>
<Cir-2026-814>, hint
