1972 USAMO Problems/Problem 2
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Problem
A given tetrahedron 
is isosceles, that is, 
. Show that the faces of the tetrahedron are acute-angled triangles.
Solution
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See also
| 1972 USAMO (Problems) | ||
| Preceded by Problem 1 | 1 • 2 • 3 • 4 • 5 | Followed by Problem 3 |
| All USAMO Problems and Solutions | ||
