1.

Prove that the tetrahedron with vertices at the point O(0, 0, 0), A(0, 1, 1), B(1, 0, 1) and C(1, 1, 0) is a regular one.

Answer»

Prove that the tetrahedron with vertices at the point O(0, 0, 0), A(0, 1, 1), B(1, 0, 1) and C(1, 1, 0) is a regular one.



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