1970 IMO Problems/Problem 6
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Problem
In a plane there are 
points, no three of which are collinear. Consider all possible triangles having these point as vertices. Prove that no more than 
of these triangles are acute-angled.
Solution
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| 1970 IMO (Problems) | ||
| Preceded by Problem 5 | 1 • 2 • 3 • 4 • 5 • 6 | Followed by Last question |
