Advanced Geometric Problem & Solution (Twice a week update) Now 4820 problems posted.
<Tri-2026-2349>, hint
<Tri-2026-2349>, general, tangency
<Spain MO 1977>
<Qua-2026-825>, hint
<Qua-2026-825>, square, construction
<Spain MO 1976>
<Tri-2026-2348>, hint
