Advanced Geometric Problem & Solution (Twice a week update) Now 4849 problems posted.
<Tri-2026-2369>, hint
<Tri-2026-2369>, general, angle
<Spain MO 2011>
<Tri-2026-2368>, hint
<Tri-2026-2368>, general, bisector
<Spain MO 2010>
<Tri-2026-2367>, hint
