Advanced Geometric Problem & Solution (Twice a week update) Now 4827 problems posted.
<Tri-2026-2355>, hint
<Tri-2026-2355>, general, angle
<Spain MO 1992>
<Tri-2026-2354>, hint
<Tri-2026-2354>, general, bisector
<Spain MO 1991>
<Tri-2026-2353>, hint
