# Construct a Dihedral Angle of a Tetrahedron Given Its Plane Angles at a Vertex

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Given the tetrahedron , at the vertex let be the three plane angles , , . This Demonstration constructs the dihedral angle at the edge .

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Contributed by: Izidor Hafner (March 2017)

Open content licensed under CC BY-NC-SA

## Snapshots

## Details

The problem was posed in [1, pp. 222].

Reference

[1] V. V. Prasolov and I. F. Sharygin, *Problems in Stereometry* (in Russian), Moscow: Nauka, 1989.

## Permanent Citation