This website contains problems from math contests. Problems and corresponding tags were obtained from the Art of Problem Solving website.

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Found problems: 1

1956 Moscow Mathematical Olympiad, 345
Tags: pyramid , 3d geometry , equal faces , trihedral angle , geometry
* Prove that if the trihedral angles at each of the vertices of a triangular pyramid are formed by the identical planar angles, then all faces of this pyramid are equal.