Symmetrical or Equal Trihedral Angles

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Diagram used to prove the theorem: “Two trihedral angles, which have three face angles of the one equal respectively to three face angles of the other , are either equal or symmetrical.”

Keywords

face, faces, equal, angles, Symmetrical, congruent, trihedral angle, symmetric

Galleries

Geometric Theorems and Proofs

Source

Arthur Latham Baker The Elements of Solid Geometr with Numerous Exercises (Boston, MA: Ginn & Company, 1893)

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