Advanced Geometric Problem & Solution (Twice a week update) Now 4829 problems posted.
<Tri-2026-2357>, hint
<Tri-2026-2357> general,locus
<Spain MO 1994>
<Tri-2026-2356>, hint
<Tri-2026-2356>, general, center
<Spain MO 1993>
<Tri-2026-2355>, hint