1973 USAMO Problems/Problem 1
Problem
Two points 
and 
lie in the interior of a regular tetrahedron 
. Prove that angle 
.
Solution
See also
| 1973 USAMO (Problems • Resources) | ||
| Preceded by First Question |
Followed by Problem 2 | |
| 1 • 2 • 3 • 4 • 5 | ||
| All USAMO Problems and Solutions | ||
