Advanced Geometric Problem & Solution (Twice a week update) Now 4818 problems posted.
<Tri-2026-2348>, hint
<Tri-2026-2348>, general, others
<Spain MO) 1971>
<Tri-2026-2347>, hint
<Tri-2026- 2347>, equilateral, construction
<Spain MO 1972>
<Cir-2026-804>, hint