IMO Shortlist 1968 problem 18


Kvaliteta:
  Avg: 0,0
Težina:
  Avg: 0,0
Dodao/la: arhiva
2. travnja 2012.
LaTeX PDF
If an acute-angled triangle ABC is given, construct an equilateral triangle A'B'C' in space such that lines AA',BB', CC' pass through a given point.
Izvor: Međunarodna matematička olimpijada, shortlist 1968